CN115312883A - battery pack - Google Patents

Abstract

The present application discloses a battery pack for adapting to a first device or a second device, which includes a cell assembly, a power management module and a circuit board assembly. The power management module is electrically connected to the cell assembly, and is used for converting the input voltage of the cell assembly into a first target current for supplying power to the first device, and converting the input voltage of the cell assembly into a first target current for supplying power to the second device. Two target currents; the circuit board assembly is electrically connected to the cell assembly and the power management module, the circuit board assembly includes a first circuit board and a second circuit board, and the power management module, the first circuit board, and the second circuit board are located in the battery pack and the power management module is fixed on the first circuit board and the second circuit board. In the above arrangement, the power management modules are fixed on two circuit boards, and the three are arranged at the same end of the battery pack along the length direction. By stacking the power management modules, the waste of space can be avoided. , which is conducive to the miniaturization of the battery pack volume.

Description

battery pack

technical field

The present application relates to the field of batteries, in particular to a battery pack.

Background technique

In order to improve the versatility of the electric tool and make the working range of the electric tool not limited by the position of the socket, many electric tools on the market are powered by a battery pack. Electric tools have the characteristics of easy portability, simple operation, and various functions, which can greatly reduce labor intensity, improve work efficiency, and realize the mechanization of manual operation. Therefore, they are widely used in construction, housing decoration, automobiles, machinery, electricity, bridges, gardening and other fields. , and enters the home in large numbers. The volume of the battery pack has a great influence on whether it can be adapted to more electric tools.

Contents of the invention

The present application provides a battery pack, which is conducive to realizing the miniaturization of the structure of the battery pack.

According to the first aspect of the present application, there is provided a battery pack for adapting the first device or the second device, the battery pack comprising:

Cell components;

A power management module, electrically connected to the cell assembly, for converting the input voltage of the cell assembly into a first target current for supplying power to the first device, and converting the input voltage of the cell assembly into the first target current for supplying power to the first device. A second target current supplied by the second device;

A circuit board assembly, electrically connected to the cell assembly and the power management module, the circuit board assembly includes a first circuit board and a second circuit board, the power management module, the first circuit board, The second circuit board is located at the same end of the battery pack, and the power management module is fixed on the first circuit board and the second circuit board.

Further, the first circuit board and the second circuit board are perpendicular to each other.

Further, the battery pack further includes a support frame for fixing the cell assembly; the first circuit board and the second circuit board are fixed to the support frame and/or the cell assembly; or ,

The battery pack further includes a housing assembly, and the first circuit board and/or the second circuit board are fixed to the housing assembly.

Further, the first circuit board and the second circuit board are respectively fixedly connected to the support frame, and the first circuit board and the second circuit board are connected by wires.

Further, the plane where the second circuit board is located is perpendicular to the axial direction of the cell assembly; the cell assembly includes a first electrode and a second electrode;

The battery pack also includes a nickel sheet assembly, the nickel sheet assembly is fixed on the second circuit board, and is electrically connected to the first electrode and the second electrode of the cell assembly, and the nickel sheet assembly is The assembly is used to electrically connect the first electrode and the second electrode of the cell assembly to the second circuit board.

Further, the first circuit board and the second circuit board enclose an accommodating space for accommodating the power management module;

The transverse orthographic projection of the accommodation space is less than or equal to the transverse orthographic projection of the whole formed by the first circuit board and the second circuit board, and the vertical projection of the accommodation space is less than or equal to the first circuit board The overall vertical projection formed by the circuit board at the second point.

Further, the first circuit board and the second circuit board are parallel to each other, and the second circuit board is fixed to the first circuit board.

Further, the circuit board assembly also includes a conductive column, and the two ends of the conductive column are fixedly connected to the first circuit board and the second circuit board, and are electrically connected to the first circuit board and the second circuit board. circuit board.

Further, the battery pack also includes a support frame for fixing the battery cell assembly;

The first circuit board is arranged below the second circuit board, and the first circuit board is fixedly connected to the support frame.

Further, the first circuit board and the second circuit board are arranged at intervals and enclose an accommodating space for accommodating the power management module.

Further, the battery pack also includes a support frame for fixing the cell assembly, and the support frame includes:

a first supporting part, used to support the cell assembly;

a second supporting part, used to support the circuit board assembly;

Wherein, the first support part and the second support part are arranged along the length direction of the battery pack, and the length direction of the battery pack is parallel to the axial direction of the cell assembly.

Further, the cell assembly includes at least one cell; the first support portion includes an arc-shaped support end surface, and the support end surface abuts against a side surface of the cell.

Further, the support end surface extends from one end of the second support part to the other end of the second support part; or, the support end surface is only located at both ends of the first support part and is used for the The two ends of the cell assembly are supported.

Further, a first heat dissipation groove penetrates through the bottom of the first supporting part, and at least part of the cell assembly is exposed through the first heat dissipation groove.

Further, the first support part includes a positioning end plate, the positioning end plate is located at an end of the first support part far away from the second support part, and one end of the cell assembly abuts against the positioning end plate. end plate;

The positioning end plate is provided with a through second heat dissipation groove, and at least part of the cell assembly is exposed through the second heat dissipation groove.

Further, the battery pack further includes a nickel sheet assembly fixedly connected to the cell assembly, and the nickel sheet assembly includes a positioning part fixed to an end of the cell assembly;

At least part of the positioning portion located at the end of the cell assembly away from the second supporting portion is located in the second heat dissipation groove.

Further, the battery pack further includes a support frame for fixing the cell assembly, at least part of the power management module, the cell assembly, the circuit board assembly and the support frame are disposed on the shell inside of the body component.

Further, the housing assembly includes:

The casing, the cell assembly, the circuit board assembly and the support frame are penetrated inside the casing, and positioning notches are provided on the casing;

The latch slot is fixed to the positioning notch, and the latch slot is provided with a recessed buckle position. When the battery pack is matched with the first device, the buckle position on the latch slot is aligned with the first device. The positioning device on the device cooperates.

Further, one end of the latch groove is provided with a protruding portion extending outward, and the upper surface of the protruding portion is against the inner wall surface of the housing.

Further, the latch slot includes an arc-shaped abutting surface, and the abutting surface abuts against a side surface of the battery cell.

Further, both ends of the housing along the length direction are provided with openings, which are respectively a first opening and a second opening, and the positioning notch is provided at an end far away from the first opening;

The housing assembly also includes a limiting end plate, and the limiting end plate is fixed to the second opening; the cell assembly, the circuit board assembly and the supporting frame enter the second opening through the first opening. the inside of the enclosure.

Further, the support frame includes a positioning end plate, and the positioning end plate abuts against the end of the cell assembly away from the circuit board assembly; the end of the latch slot away from the first opening abuts against on the positioning end plate;

The housing assembly further includes a fastener, and the fastener is sequentially fixedly connected to the limiting end plate, the positioning end plate of the support frame, and the latch slot.

Further, the edge of the latch groove far away from the first opening extends outward to form a shielding portion, and the plane of the end face of the shielding portion far away from the first opening is located and the plane of the outer shell far away from the first opening. The planes in which the end faces of the openings lie coincident.

Further, the housing assembly further includes a decorative end plate, the decorative end plate is fixed to the second opening and abuts against the limiting end plate; the decorative end plate is far away from the first opening The plane of the end surface of the shielding part away from the first opening and the plane of the end surface of the housing away from the first opening are coincident.

Further, the battery pack also includes:

The first discharge interface is used to cooperate with the first device and provide power support for the first device;

The first charging interface is used to cooperate with the power supply device and to supply power to the battery pack;

Wherein, both the first discharging interface and the first charging interface are located at an end of the battery pack close to the circuit board assembly.

Further, the battery pack further includes a second discharge interface, which is used to cooperate with the second device and provide power support for the second device;

The battery pack includes an interface end plate, the interface end plate is arranged at one end of the battery pack close to the circuit board assembly, and the surface of the interface end plate is inwardly recessed to accommodate the second discharge interface positioning space.

Further, the second discharge interface includes a wire part and an interface part; the positioning space includes a first positioning cavity for accommodating the wire part and a second positioning cavity for accommodating the interface part;

The first positioning cavity is bent and arranged on the interface end plate; and/or, at least part of the second positioning cavity extends inward along the length direction of the battery pack.

Further, the battery pack also includes a support frame for fixing the cell assembly, and the interface end plate is at least part of the support frame; or, the battery pack also includes a support frame for accommodating the power management The shell assembly of the module, the cell assembly and the circuit board assembly, the interface end plate is at least a part of the shell assembly.

Further, the cell assembly also includes a first electrode and a second electrode;

The battery pack also includes a nickel sheet assembly, and the nickel sheet assembly includes a first connecting portion fixedly connected to the first electrode and a second connecting portion fixedly connected to the second electrode; the first connecting portion and the second connecting portion At least part of the two connecting parts are bent and pass through the circuit board assembly, and electrically connect the first electrode and the second electrode to the circuit board assembly.

Further, the power management module includes:

A first power management module, fixed on the first circuit board, for converting the input voltage into a first target output current, and the first target output current is used to supply power to the first device;

The second power management module is fixed on the second circuit board and is used to convert the input voltage into a second target output current, and the second target output current is used to supply power to the second device.

Further, the circuit board assembly also includes a button circuit board, and the battery pack also includes a support frame for fixing the battery cell assembly;

The button circuit board is fixed to the support frame and electrically connected to the first circuit board and/or the second circuit board;

The integral body formed by the first circuit board and/or the second circuit board and the button circuit board is arranged at two ends of the cell assembly opposite to each other in the axial direction.

Further, an indicator light is provided on the button circuit board, and the indicator light is used for displaying the charging and discharging conditions of the battery pack, and for displaying the electric quantity of the battery pack.

Further, the support frame includes a positioning end plate for abutting against the battery core assembly away from the first circuit board and the second circuit board; the button circuit board is fixed on the positioning end plate away from the positioning end plate. One end of the cell assembly.

Further, the end of the positioning end plate that is far away from the cell assembly extends outward to form a plurality of positioning columns, and the plurality of positioning columns encloses a locking space for locking the button circuit board, and the button circuit The board is fixed in the clamping space.

Further, the first target current is greater than the second target current.

According to the second aspect of the present application, there is provided a battery pack, the battery pack includes a cell assembly, a power management module, and a circuit board assembly;

The circuit board assembly includes first circuit boards and second circuit boards arranged in a staggered manner; the first circuit boards and the second circuit boards are arranged on the same side of the electric core assembly.

The power management module includes a first power management module and a second power management module, the first power management module is set on the first circuit board, and the second power management module is set on the second circuit board .

The technical solution provided by this application may include the following beneficial effects:

In the above setting, the power management module is fixed on two circuit boards, and the three are arranged at the same end of the battery pack along the length direction, and the waste of space can be avoided by stacking the power management modules , which is conducive to the miniaturization of the battery pack volume.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of a battery pack in an embodiment of the present application.

FIG. 2 is a schematic diagram of another three-dimensional structure of a battery pack in an embodiment of the present application.

FIG. 3 is a schematic diagram of an exploded structure of a battery pack in an embodiment of the present application.

FIG. 4 is a schematic diagram of another exploded structure of the battery pack in an embodiment of the present application.

FIG. 5 is a schematic perspective view of a cell assembly and a circuit board assembly of a battery pack in an embodiment of the present application.

FIG. 6 is another schematic perspective view of the cell assembly and the circuit board assembly of the battery pack in an embodiment of the present application.

FIG. 7 is a schematic perspective view of the internal structure of the battery pack in an embodiment of the present application.

FIG. 8 is another perspective view of the internal structure of the battery pack in an embodiment of the present application.

FIG. 9 is a schematic perspective view of a cell assembly and a nickel sheet assembly of a battery pack in an embodiment of the present application.

FIG. 10 is another schematic perspective view of the cell assembly and the nickel sheet assembly of the battery pack in an embodiment of the present application.

FIG. 11 is a schematic perspective view of the supporting frame of the battery pack in an embodiment of the present application.

FIG. 12 is another perspective view of the supporting frame of the battery pack in an embodiment of the present application.

FIG. 13 is another perspective view of the internal structure of the battery pack in an embodiment of the present application.

FIG. 14 is another perspective view of the internal structure of the battery pack in an embodiment of the present application.

FIG. 15 is a schematic perspective view of the latch slot of the battery pack according to an embodiment of the present application.

FIG. 16 is another perspective view of the latch slot of the battery pack in an embodiment of the present application.

FIG. 17 is a schematic cross-sectional structure diagram of a battery pack in an embodiment of the present application.

Fig. 18 is an enlarged view of area A in Fig. 17 .

Explanation of reference signs

battery pack 10

Cell assembly 100

Cell 110

first electrode 111

second electrode 112

Power management module 200

The first power management module 210

The second power management module 220

Circuit board assembly 300

first circuit board 310

second circuit board 320

Accommodating space 330

Conductive column 340

Button circuit board 350

Indicator light 351

Shade 352

Insulation board 360

control button 370

Housing assembly 400

Shell 410

positioning gap 411

first opening 413

second opening 414

Latch slot 420

Buckle bit 421

Protrusion 422

Abutment surface 423

Shield 424

Limiting end plate 430

Fastener 440

Decorative end plate 450

Support frame 500

first support part 510

Support end face 511

The first cooling slot 512

Positioning end plate 513

Positioning column 5131

Card design space 5132

Second cooling slot 514

Second support part 520

Nickel sheet assembly 600

first connection part 610

Second connection part 620

Positioning unit 630

The first discharge interface 710

Second discharge interface 720

Wire part 721

interface part 722

The first charging interface 800

Interface end plate 900

positioning space 910

First positioning cavity 911

Second positioning cavity 912

First discharge port 920

First charging port 930

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The manners described in the following exemplary embodiments do not represent all manners consistent with the present application. Rather, they are merely examples of means consistent with aspects of the present application as recited in the appended claims.

The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the usual meanings understood by those having ordinary skill in the field of this application. "First", "second" and similar words used in the specification and claims of this application do not indicate any sequence, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a limitation of quantity, but indicate that there is at least one, and if only "one" is referred to, it will be described separately. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front", "rear", "lower" and/or "upper" are used for convenience of description only and are not intended to be limiting to a position or orientation in space. "Includes" or "comprises" and similar terms mean that the elements or items listed before "comprises" or "comprises" include the elements or items listed after "comprises" or "comprises" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "the" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the features in the following embodiments can be combined with each other.

As shown in FIG. 1 and FIG. 2 , the present application relates to a battery pack 10 that can be adapted to a first device or a second device. Wherein, the power supply current of the battery pack 10 to the first device and the second device is different, in other words, the battery pack 10 can provide different sizes of target currents to different electronic devices, so as to adapt to different electronic devices.

In this embodiment, the first device is a large-current electrical device, such as a garden tool, an electric tool, and the like. The second device is a low-current power-consuming device, such as mobile phones, earphones, tablets, smart watches, etc. in 3C products.

In combination with what is shown in FIG. 3 and FIG. 4 , refer to what is shown in FIG. 5 when necessary. The battery pack 10 includes a cell assembly 100 , a power management module 200 , a circuit board assembly 300 , a housing assembly 400 and a supporting frame 500 .

Wherein, the power management module 200 is electrically connected to the cell assembly 100, and is used for converting the input voltage of the cell assembly 100 into a first target current for supplying power to the first device, and for converting the input voltage of the cell assembly 100 is the second target current to supply power to the second device. Specifically, referring to FIG. 5 , the power management module 200 includes a first power management module 210 and a second power management module 220 . The first power management module 210 is used to convert the input voltage into a first target output current, and the first target output current is used to supply power to the first device. The second power management module 220 is used to convert the input voltage into a second target output current, and the second target output current is used to supply power to the second device. The first target current is greater than the second target current.

As shown in FIGS. 5 and 6 , the circuit board assembly 300 is electrically connected to the cell assembly 100 and the power management module 200 , and the cell assembly 100 includes a first electrode (positive electrode) and a second electrode (negative electrode). Both the first electrode and the second electrode are electrically connected to the circuit board assembly 300 , and are electrically connected to the circuit board assembly 300 through the power management module 200 . Specifically, the circuit board assembly 300 includes a first circuit board 310 and a second circuit board 320 . The power management module 200 is fixed on the first circuit board 310 and the second circuit board 320 . In some embodiments, the first power management module 210 is fixed on the first circuit board 310, and the second power management module 220 is fixed on the second circuit board 320, which facilitates follow-up maintenance work and improves space utilization. Rate. At this time, the first circuit board 310 serves as a high current protection board and provides a large current for the first device; the second circuit board 320 serves as a PD protection board and provides a small current for the second device. Of course, in other embodiments, it is not necessary to fix the first power management module 210 and the second management module in the above manner. Various electronic components in the power management module 200 can be arranged according to the space enclosed by the first circuit board 310 and the second circuit board 320 after being fixed. For example, the first management module can be fixed on the first circuit board 310 and the second circuit board 320 at the same time, or only on the first circuit board 310 or the second circuit board 320; similarly, the The second management module is fixed on the first circuit board 310 and the second circuit board 320 at the same time, or only on the first circuit board 310 or the second circuit board 320. The space between the two circuit boards 320 is determined.

It should be noted that, in the embodiment shown in FIG. 6 , since the first circuit board and the second circuit board are arranged in parallel, the power management module 200 located between the two circuit boards is blocked and cannot be seen.

As shown in FIG. 7 and FIG. 8 , as shown in FIG. 1 to FIG. 4 if necessary, the support frame 500 is used to fix the cell assembly 100 and the circuit board assembly 300 . At least part of the power management module 200, the cell assembly 100, the circuit board assembly 300 and the support frame 500 are disposed inside the housing assembly 400, and the power management module 200, the first circuit board 310 and the second circuit board 320 Located at the same end of the battery pack 10 . In this embodiment, the battery cell assembly 100 , the circuit board assembly 300 and the power management module 200 can be connected to form a whole by using the support frame 500 , and then the whole is fixed inside the housing assembly 400 . Of course, in other embodiments, the supporting frame 500 may not be provided, and the electronic component and the circuit board component 300 can be fixed only by the housing component 400 .

As shown in Figure 9 and Figure 10, refer to Figure 5-Figure 8 when necessary. The cell assembly 100 includes at least one cell 110 . In this embodiment, the cell assembly 100 is formed by connecting multiple cylindrical cells 110 in series, and the cells 110 are arranged in a direction X perpendicular to the axis of the cells 110 . Specifically, the battery pack 10 further includes a nickel sheet assembly 600 , and the nickel sheet assembly 600 is used to connect a plurality of battery cells 110 in series to form the battery cell assembly 100 . The nickel sheet assembly 600 includes a first connection portion 610 fixedly connected to the first electrode 111 of the cell assembly 100 and a second connection portion 620 fixedly connected to the second electrode 112 . At least part of the first connecting portion 610 and the second connecting portion 620 are bent and pass through the circuit board assembly 300 , and electrically connect the first electrode 111 and the second electrode 112 to the circuit board assembly 300 . In the above arrangement, the nickel sheet assembly 600 is used to electrically connect the battery cells 110 to form the battery cell assembly 100 , and to electrically connect the battery cell assembly 100 to the circuit board assembly 300 . At the same time, the nickel sheet assembly 600 and the battery cell 110 are fixedly connected by spot welding, which plays a role of fixedly connecting each adjacent battery cell 110 , and at the same time, the battery cell assembly 100 and the circuit board assembly 300 are also fixedly connected. The first connecting portion 610 and the second connecting portion 620 penetrate into the circuit board assembly 300 by bending, which can effectively utilize the space and improve the utilization rate of the space.

Based on this, the power management module 200 , the first circuit board 310 and the second circuit board 320 are located at any end of the battery cell 110 in the axial direction. Of course, in other embodiments, the cells 110 can also be in other shapes, and the arrangement of the cells 110 can also be different. At this time, the power management module 200, the first circuit board 310 and the second circuit board 320 are located in the battery pack. 10 Any section along the length direction. Since the battery pack 10 needs to be adapted to the first electronic device and the second electronic device, and the current consumption of the two devices is different. In other words, the power management module 200 in the battery pack 10 needs to convert the same voltage into a first target current and a second target current with different magnitudes, therefore, two sets of management modules (first management module and second management module) are required .

In one design, the first management module and the second management module are flattened and fixed on the same circuit board, and the circuit board is placed on the peripheral side of the cell assembly 100, because the first management module and the second management module The module includes electronic components of various sizes, and some of them include electronic components with large sizes (for example, capacitors), which will cause the thickness or width of the battery pack 10 to be too large. At the same time, due to the way of tiling and fixing, in order to meet the installation of large-sized electronic components, it will lead to the need to reserve too much space, resulting in a large space in the housing assembly 400 being wasted, and finally it is difficult to realize the battery. Miniaturized design in pack of 10. However, in the above arrangement of the present application, the power management module 200 is fixed on two circuit boards (the first circuit board 310 and the second circuit board 320), and the three are arranged on the battery pack 10 along the lengthwise direction. At the same end, by stacking the power management modules 200 , the waste of space can be avoided, which is beneficial to realize the miniaturization of the battery pack 10 .

As shown in FIG. 3 , FIG. 5 and FIG. 7 , in an embodiment, the first circuit board 310 and the second circuit board 320 are perpendicular to each other. The first circuit board 310 and the second circuit board 320 arranged vertically can effectively utilize the end space of the battery pack 10 .

Further, the first circuit board 310 and the second circuit board 320 are fixed on the support frame 500 and the cell assembly 100 . At the same time, the supporting frame 500 plays a role of fixing and carrying the battery cell assembly 100 . Through the above manner, the fixed connection between the first circuit board 310 and the second circuit board 320 is realized. Certainly, in other embodiments, the first circuit board 310 may be fixedly connected only through the support frame 500 , or may be fixedly connected only through the cell assembly 100 . Alternatively, as mentioned above, when the battery pack 10 does not include the support frame 500 , the first circuit board 310 and/or the second circuit board 320 can also be fixedly connected to the case assembly 400 .

It should be noted that the first circuit board 310 and the second circuit board 320 are fixed to one end of the cell assembly 100 through the nickel sheet assembly 600 .

Since the first circuit board 310 and the second circuit board 320 are arranged vertically, the area of the opposing surface between the first circuit board 310 and the second circuit board 320 is relatively small. If the fixed connection and electrical connection of the two are realized by means of small-area welding or bonding, there will be risks such as fracture of the connection structure. Therefore, in this embodiment, the supporting frame 500 is provided with a locking position 421 for supporting and locking the circuit board assembly 300 , and the first circuit board 310 and the second circuit board 320 are respectively fixedly connected to the supporting frame 500 . Meanwhile, the first circuit board 310 and the second circuit board 320 are electrically connected through wires.

In the above arrangement, the first circuit board 310 and the second circuit board 320 are fixedly connected through the supporting frame 500, and are electrically connected flexibly through wires. While ensuring the stability of the fixed connection between the first circuit board 310 and the second circuit board 320 , the electrical connection between the two is realized.

Further, the plane where the second circuit board 320 is located is perpendicular to the axis of the cell assembly 100 , and the plane where the first circuit board 310 is located is parallel to or coincident with the axis of the cell assembly 100 . After the cells 110 are connected in series through the nickel sheet assembly 600 , the first electrode 111 and the second electrode 112 of the cell assembly 100 are formed. The nickel sheet assembly 600 is fixed on the second circuit board 320 and electrically connected to the first electrode 111 and the second electrode 112 of the cell assembly 100 . In other words, the nickel sheet assembly 600 is used to electrically connect the first electrode 111 and the second electrode 112 of the cell assembly 100 to the second circuit board 320 . Of course, in other embodiments, the positions of the first circuit board 310 and the second circuit board 320 may also be exchanged.

In the above arrangement, the nickel sheet assembly 600 plays the role of connecting and fixing multiple battery cells 110 in series, so that the multiple battery cells 100 are connected to form a whole. At the same time, the nickel sheet assembly 600 can also serve as an electrical connection between the cell assembly 100 and the circuit board assembly 300 . Furthermore, the nickel sheet assembly 600 is fixed to the circuit board assembly 300 and the battery cell 100 by welding or spot welding, which can strengthen the fixed connection relationship between the battery cell assembly 100 and the circuit board assembly 300 .

Further, the first circuit board 310 and the second circuit board 320 enclose an accommodating space 330 for accommodating the power management module 200 . The transverse orthographic projection of the accommodation space 330 is less than or equal to the transverse orthographic projection of the whole formed by the first circuit board 310 and the second circuit board 320, and the vertical projection of the accommodation space 330 is less than or equal to the first circuit board 310 and the second circuit board 320. The slabs form a whole in vertical projection. In other words, the power management module is fixed on the first circuit board 310 and the second circuit board 320, and the space where it is located will not exceed the area enclosed by the first circuit board 310 and the second circuit board 320, thereby ensuring power management The module 200 can make full use of the accommodating space 330 to improve space utilization as much as possible.

As shown in FIG. 4 , FIG. 6 and FIG. 8 , in another embodiment, the first circuit board 310 and the second circuit board 320 are parallel to each other. Wherein, the second circuit board 320 is fixed on the first circuit board 310 . In the embodiment corresponding to the above picture, the planes where the first circuit board 310 and the second circuit board 320 are located are both parallel to the axial direction of the electric core 110 . Certainly, in other embodiments, the planes where the first circuit board 310 and the second circuit board 320 are located may also be perpendicular to the axial direction of the electric core 110 .

Further, the circuit board assembly 300 further includes a conductive post 340 , the two ends of the conductive post 340 are fixedly connected to the first circuit board 310 and the second circuit board 320 , and are electrically connected to the first circuit board 310 and the second circuit board 320 .

In the above-mentioned setting, since the first circuit board 310 and the second circuit board 320 are arranged in parallel, the area of the surface opposite to the first circuit board 310 and the second circuit board 320 is relatively large, and the horizontal surface can be arranged on the larger surface. The conductive column 340 with a larger cross-section is used to realize the electrical connection and fixed connection between the first circuit board 310 and the second circuit board 320 . At this time, the first circuit board 310 and the second circuit board 320 can realize a stable fixed connection relationship and an effective electrical connection relationship through the conductive pillar 340 , with a simple structure and reliable stability.

Continuing to observe the above figure, the first circuit board 310 is disposed below the second circuit board 320 , and the first circuit board 310 is fixedly connected to the support frame 500 . At the same time, the nickel sheet assembly 600 is fixed on the first circuit board 310, while providing an electrical connection between the cell assembly 100 and the circuit board assembly 300, further strengthening the fixed connection between the cell assembly 100 and the circuit board assembly 300 relation. Certainly, in other embodiments, the positions of the first circuit board 310 and the second circuit board 320 may also be exchanged up and down.

Further, the first circuit board 310 and the second circuit board 320 are arranged at intervals, and enclose an accommodating space 330 for accommodating the power management module 200 . Electronic components in the power management module 200 are soldered to the first circuit board 310 and the second circuit board 320 respectively, and are located between the first circuit board 310 and the second circuit board 320 . It should be noted that when the circuit board assembly 300 and the cell assembly 100 are fixed inside the housing assembly 400, if there is a certain gap between the inner wall of the housing assembly 400 and the circuit board assembly 300, then the power management module 200 can be placed Part of the electronic components in the first circuit board 310 is fixed on the end surface away from the second circuit board 320 , or fixed on the end surface of the second circuit board 320 away from the first circuit board 310 . It is only necessary to ensure that most components in the power management module 200 are located between the first circuit board 310 and the second circuit board 320 .

Of course, in other embodiments, the first circuit board 310 and the second circuit board 320 can also be arranged alternately at other angles, but it is necessary to ensure that the first circuit board 310 and the second circuit board 320 are arranged on the same side to realize the miniaturization design of the battery pack 10 .

As shown in Figure 11 and Figure 12 , combined with Figure 3 , Figure 4 , Figure 7 and Figure 8 when necessary. The support frame 500 includes a first support part 510 and a second support part 520 .

Wherein, the first support portion 510 is used to support the cell assembly 100 . The second supporting portion 520 is used to support the circuit board assembly 300 . The first support part 510 and the second support part 520 are arranged along the length direction of the battery pack 10 . It should be noted that the length direction of the battery pack 10 is parallel to the axis of the cell assembly 100 and the cells 110 in the cell assembly 100 .

Through the above settings, the internal space of the support frame 500 is divided functionally and structurally, so that the structural arrangement of the support frame 500 is more reasonable, and can better match the corresponding battery cell assembly 100, circuit board assembly 300 and power management module. 200 structures. The circuit board assembly 300 can be fixed on the second supporting part 520 to realize the structure that the circuit board assembly 300 is located at one end of the battery pack 10 .

It should be noted that, in some embodiments, the support frame 500 can be completely located inside the shell assembly 400 and wrapped by the shell assembly 400 . Alternatively, in some other embodiments, the end surface of the support frame 500 may be exposed to the casing assembly 400 and constitute at least part of the end surface of the battery pack 10 .

Further, the first supporting portion 510 includes an arc-shaped supporting end surface 511 , the supporting end surface 511 leans against the side of the battery cell 110 , so as to play a role of stabilizing the battery cell 110 .

As shown in FIG. 11 , in one embodiment, the supporting end surface 511 extends from one end of the second supporting portion 520 to the other end of the second supporting portion 520 . Through the above arrangement, the side surface of the battery cell 110 is fully set off, thereby avoiding the risk of the battery cell 110 being displaced.

As shown in FIG. 12 , in another embodiment, the supporting end surfaces 511 are only located at both ends of the first supporting portion 510 and are used to support both ends of the cell assembly 100 . Through the above setting, while achieving sufficient support and fixation, the contact area between the support end surface 511 and the cell assembly 100 can be appropriately reduced, thereby improving the heat dissipation capacity of the cell assembly 100, protecting the safety of the battery pack 10, and improving its lifespan. .

Further, as shown in FIG. 12 , a first cooling groove 512 penetrating in a direction perpendicular to the axis of the battery cell 110 is opened below the first supporting portion 510 , and at least part of the battery cell assembly 100 is exposed through the first cooling groove 512 . Through the above configuration, the heat dissipation capability of the battery cell assembly 100 can be further improved, the safety of the battery pack 10 can be protected, and the service life of the battery pack 10 can be improved.

As shown in Figure 11- and Figure 14, the first support part 510 also includes a positioning end plate 513, the positioning end plate 513 is located at the end of the first support part 510 away from the second support part 520, and one end of the cell assembly 100 is against It is used to position the end plate 513 so as to limit the position of the cell assembly 100 . The positioning end plate 513 is provided with a second heat dissipation groove 514 through which at least part of the cell assembly 100 is exposed through the second heat dissipation groove 514 . Through the above setting, while the cell assembly 100 is limited, the contact area between the positioning end plate 513 and the cell assembly 100 can be appropriately reduced, thereby further improving the heat dissipation capacity of the cell assembly 100 and protecting the battery pack 10. Safety, improve its life.

As further shown in FIG. 2 and FIG. 3 , the nickel sheet assembly 600 includes a positioning portion 630 fixed to the end of the cell assembly 100 , and at least part of the positioning portion 630 located at the end of the cell assembly 100 away from the second support portion 520 Located in the second cooling slot 514 . Through the above arrangement, the problem that the positioning portion 630 in the nickel plate assembly 600 takes up too much space, resulting in an increase in the length of the battery pack 10 , is avoided. At the same time, it is also beneficial to improve the heat dissipation capability of the battery cell assembly 100 .

As shown in Figure 1-Figure 4, combined with Figure 15-Figure 18 when necessary. The housing assembly 400 includes a housing 410 , a latch slot 420 and a limiting end plate 430 .

Wherein, the cell assembly 100 , the circuit board assembly 300 and the supporting frame 500 are penetrated inside the casing 410 , and a positioning notch 411 is provided on a peripheral side of the casing 410 . The latch slot 420 is fixed to the positioning notch 411, and the latch slot 420 is provided with a recessed buckle position 421. When the battery pack 10 is matched with the first device, the buckle position 421 on the latch slot 420 is matched with the positioning device on the first device . For example, the positioning device on the first device is a latch. When the battery pack 10 is adapted to the first device, the buckle position 421 and the latch are snapped together, thereby realizing the fixing of the battery pack 10 and the first device, avoiding During the operation of the first device, the problem of the battery pack 10 falling occurs.

In this embodiment, the latch groove 420 and the casing 410 are relatively independent parts, and the two are fixed together when the battery pack 10 is to be assembled. With such an arrangement, the latch groove 420 and the housing 410 can be made of two different materials. For example, in order to ensure a stable connection between the latch groove 420 and the latch in the first device and reduce the difficulty of the process, the latch groove 420 can be made of a metal material with high hardness and good stability. In order to ensure the portability of the battery pack 10 , the casing 410 can be made of light plastic. Of course, in other embodiments, the latch slot 420 and the housing 410 can also be integrally formed parts.

Further, as shown in FIG. 17 and FIG. 18 , one end of the latch groove 420 is provided with a protruding portion 422 extending outward, the upper surface of the protruding portion 422 is against the inner wall surface of the housing 410 , and the latch groove 420 The end surface 4221 provided with the protruding portion 422 abuts against the sidewall surface 4111 of the housing 410 provided with the positioning notch 411 . Through the above arrangement, the movement of the latch slot 420 away from the battery cell 110 is restricted, and at the same time, the movement of the latch slot 420 to the left in the figure is restricted.

Further, as shown in FIG. 15 and FIG. 16 , it must be combined with that shown in FIG. 7 , FIG. 8 , FIG. 11 and FIG. 12 . The latch slot 420 and the positioning notch 411 are far away from the second supporting portion 520 and are disposed above the first supporting portion 510 . Specifically referring to FIG. 16 , the bottom of the latch slot 420 further includes an arc-shaped abutment surface 423 , and the abutment surface 423 abuts against the peripheral side of the battery cell 110 . Through the above method, the latch slot 420 is restricted from moving toward the battery cell 110 .

As shown in Figure 17 and Figure 18, combined with Figure 3 and Figure 4 when necessary, openings are provided at both ends of the housing 410 along the length direction, which are respectively a first opening 413 and a second opening 414, and the positioning notch 411 is arranged on One end away from the first opening 413 . In other words, the first opening 413 is close to the second support part 520 and away from the first support part 510 ; the second opening 414 is close to the first support part 510 and away from the second support part 520 .

The limiting end plate 430 is fixed on the second opening 414 . The cell assembly 100 , the circuit board assembly 300 and the supporting frame 500 enter the interior of the housing 410 through the first opening 413 . Afterwards, the latch slot 420 is fixed to the positioning notch 411 . Finally, the positioning end plate 513 is fixed to the second opening 414 . Through the above-mentioned manner, the fixed installation of the housing 410 assembly, the cell assembly 100 , the circuit board assembly 300 , the support frame 500 , and the latch slot 420 is realized.

Wherein, an end of the latch groove 420 away from the first opening 413 abuts against the positioning end plate 513 . The housing assembly 400 further includes a fastener 440 , and the fastener 440 is fixedly connected to the limiting end plate 430 , the positioning end plate 513 of the supporting frame 500 and the latch groove 420 in sequence. Through the above-mentioned manner, the fixed connection of the latch slot 420 , the support frame 500 and the housing assembly 400 is realized.

Further, the edge of the latch groove 420 away from the first opening 413 extends outward to form a shielding portion 424 , the plane where the end surface of the shielding portion 424 away from the first opening 413 is located and the end surface of the housing 410 away from the first opening 413 are located. plane coincidence. Through the above arrangement, the outer surface of the latch groove 420 is flush with the outer surface of the housing 410 , improving the overall aesthetics. At the same time, foreign impurities can be deposited on uneven joints.

Further, in order to avoid exposure of the fastener 440, the housing assembly 400 further includes a decorative end plate 450, the decorative end plate 450 is fixed to the second opening 414, and leans against the positioning end plate 513 of the limiting end plate 430 s surface. The decorative end plate 450 can be fixedly connected to the edge of the housing 410 by means of ultrasonic welding, so as to shield structures such as the fasteners 440 inside the housing 410 and realize ugliness. Wherein, the plane of the end surface of the decorative end plate 450 away from the first opening 413 , the plane of the end surface of the shielding portion 424 away from the first opening 413 , and the plane of the end surface of the housing 410 away from the first opening 413 coincide. Through the above arrangement, the flushness between the latch groove 420 and the outer surface of the casing assembly 400 can be further improved, and the flatness of the outer surface of the battery pack 10 can be improved, which is beneficial to improve the overall aesthetics. At the same time, foreign impurities can be deposited on uneven joints.

Further, as shown in FIG. 4 , the circuit board assembly 300 also includes a button circuit board 350 , the button circuit board 350 is fixed to the support frame 500 , and the button circuit board 350 is connected to the first circuit board 310 and/or the second circuit board 320 electrical connection. The integral body formed by the first circuit board 310 and the second circuit board 320 and the button circuit board 350 are arranged on opposite ends of the cell assembly 100 along the axial direction. In this embodiment, the first circuit board 310 and the second circuit board 320 are disposed close to the first opening 413 , and the button circuit board 350 is disposed close to the second opening 414 .

The button circuit board 350 is electrically connected to the first circuit board 310 or the second circuit board 320 through wires. The wires extend along the axis of the battery core 110 . The circuit board assembly 300 further includes an insulating plate 360 disposed on the peripheral side 110 of the electric core to isolate the above-mentioned wire from the electric core.

As shown in FIG. 4 , in this embodiment, the button circuit board 350 is fixed on the end of the positioning end plate 513 away from the cell assembly 100 . Specifically, the end of the positioning end plate 513 that is far away from the cell assembly 100 extends outward to form a plurality of positioning columns 5131, and the plurality of positioning columns 5131 enclose a clamping space 5132 for clamping the button circuit board 350. The button circuit board 350 It is fixed in the clamping space 5132. Through the above method, the fixed connection of the button circuit board 350 is realized, and at the same time, the button circuit board 350 can avoid occupying too much space, which is beneficial to realize the miniaturization design of the battery pack 10 .

Further, when the fastener 440 is used to fixedly connect the limiting end plate 430 , the positioning end plate 513 of the support frame 500 and the latch groove 420 , the fastener 440 is fixed to the protruding positioning column 5131 on the positioning end plate 513 . Through the above arrangement, it is possible to avoid the problem of excessive thickness of the positioning end plate 513 due to the need to provide positioning holes with a certain depth on the positioning end plate 513 for accommodating fasteners. The positioning column 5131 is fully utilized so that it has dual functions of fixing the fastener 440 and the button circuit board 350 .

In this embodiment, the button circuit board 350 can be used to control the charging and discharging of the battery pack 10 , and can also be used to control the display of the power of the battery pack 10 . Certainly, in other embodiments, the battery pack 10 can realize automatic charging and discharging, and at this time, the button circuit board 350 can only be used for controlling and displaying the power of the battery pack 10 . In this embodiment, a control button 370 is provided on the end surface of the battery pack 10 close to the button circuit board 350 . By clicking the control button 370 , the user can control the switch button on the button circuit board 350 to realize charging and discharging of the battery pack 10 and/or realize power display.

Further, as shown in FIG. 4 , an indicator light 351 is provided on the button circuit board 350 , and the indicator light 351 is used to display the charging and discharging status of the battery pack 10 and the power of the battery pack 100 . A lampshade 352 for guiding light is also installed on the indicator light 351 . One end of the lampshade 352 away from the button circuit board 350 is exposed, and is used to show the user the information that the indicator light 351 is on or off. Specifically, the indicator light 351 can display charging or discharging by displaying different colors, and can also display the electric quantity of the battery cell assembly 100 by displaying different colors. The color reminder can reduce or prevent the user from simultaneously discharging and discharging the battery pack 10, thereby improving the safety of use, and at the same time improving the life of the battery. It is also possible that the number of indicator lights 351 is set to be multiple, and different numbers of indicator lights 351 are turned on to correspond to the power of the battery cell assembly 100 . Through the above settings, the experience of human-computer interaction is increased.

As shown in Figure 5 and Figure 6, refer to Figure 1, Figure 3 and Figure 4 when necessary. The battery pack 10 also includes a first discharging interface 710 , a second discharging interface 720 and a first charging interface 800 .

The first discharge interface 710 is used for cooperating with the first device and providing power support for the first device. The second discharge interface 720 is used for cooperating with the second device and providing power support for the second device. The first charging interface 800 is used for cooperating with external power supply equipment and for supplying power to the battery pack 10 . Wherein, both the first discharging interface 710 and the first charging interface 800 are located at one end of the battery pack 10 close to the circuit board assembly 300 . In the above arrangement, it is convenient to realize the electrical connection between the first discharging interface 710 and the first charging interface 800 and the circuit board assembly 300 .

Further, the first discharging interface 710 and the first charging interface 800 are arranged on the same side of the battery pack 10 . In the above arrangement, when the battery pack 10 cooperates with the first device and supplies power to the first device, at least part of the battery pack 10 enters the interior of the first device. At this time, the first discharging interface 710 of the battery pack 10 matches the corresponding power supply interface of the first device. In other words, the end of the battery pack 10 provided with the first discharge interface 710 will enter the interior of the first device, then the first charging interface 800 located on the same side as the first discharge interface 710 will also enter the interior of the first device . Then, when the battery pack 10 supplies a large current to the first device, the first charging interface 800 is covered, and the battery pack 10 cannot be charged. Through the above settings, the scene of the battery pack 10 being powered on and discharged at the same time due to the user's misoperation is avoided, the safety performance of the battery pack 10 is improved, and its service life is extended.

In this embodiment, the second discharge interface 720 includes a wire portion 721 and an interface portion 722 . The interface part 722 can include a plurality of different discharge interfaces (for example: Lighting interface, Typr-C interface, etc.), through the above-mentioned settings, the second discharge interface 720 can charge the second device with different types of interfaces, increasing the use of convenience.

As shown in Figure 1, Figure 11 and Figure 12, the battery pack 10 includes an interface end plate 900, the interface end plate 900 is arranged on one end of the battery pack 10 close to the circuit board assembly 300, and the surface of the interface end plate 900 is recessed inward for forming In the positioning space 910 for accommodating the second discharge interface 720 . In this embodiment, the end plate on the side of the support frame 500 away from the first support portion 510 is used as the interface end plate 900, in other words, the interface end plate 900 is at least part of the support frame 500, the interface end plate 900 and the positioning end plate 513 is arranged oppositely along the length direction of the support frame 500 . Certainly, in other embodiments, the interface end plate 900 may also serve as at least a part of the housing assembly 400 , in other words, the interface end plate 900 serves as at least a part of the housing assembly 400 .

Further, as shown in FIG. 11 and FIG. 12 , the positioning space 910 includes a first positioning cavity 911 for accommodating the wire portion 721 and a second positioning cavity 912 for accommodating the interface portion 722 .

The first positioning cavity 911 is bent and set on the interface end plate 900, so that in a limited space, the space for accommodating the wire part 721 can be increased, so that the length of the wire part 721 can be appropriately increased, which is beneficial to the use of the second The charging interface 720 charges the second device.

At least part of the second positioning cavity 912 extends inward along the length direction of the battery pack 10 . In other words, the second positioning cavity 912 protrudes into the second supporting portion 520 . In the above arrangement, since only the circuit board assembly 300 and the power management module 200 are disposed inside the second supporting portion 520 , some remaining space is reserved. Extending the second positioning cavity 912 into the second supporting portion 520 can make full use of its space, effectively improve the utilization rate of the internal space of the battery pack 10 , and facilitate the miniaturization design of the battery pack 10 . At the same time, extending the second positioning cavity 912 to the inside of the battery pack 10 can reduce the end surface area of the interface end plate 900 occupied by the second positioning cavity 912, thereby reserving more end surface area for setting the first positioning cavity 911, the length of the wire portion 721 can be appropriately extended to improve the convenience of the user.

Further, as shown in FIG. 1 , a first discharge port 920 and a first charge port 930 are provided through the interface end plate 900 . The first discharge port 920 is disposed corresponding to the first discharge interface 710, so that the first discharge interface 710 is exposed. When the battery pack 10 cooperates with the first device to supply power thereto, the power supply interface of the first device is electrically connected to the first discharge interface 710 through the first discharge port 920 . The first charging port 930 is set corresponding to the first charging interface 800, so that the first charging interface 800 is exposed. When the battery pack 10 cooperates with an external power supply device so that the external power supply device supplies power to the battery pack 10 , the contacts of the external power supply device are electrically connected to the first charging interface 800 through the first charging port 930 .

In the above arrangement, the first discharge port 920 , the first charge port 930 and the second discharge port 720 are all disposed on the same side of the battery pack 10 . When the battery pack 10 cooperates with the first device and supplies power to the first device, at least part of the battery pack 10 enters the interior of the first device. At this time, the first discharging interface 710 of the battery pack 10 matches the corresponding power supply interface of the first device. In other words, one end of the battery pack 10 provided with the first discharge interface 710 and the first discharge port 920 will enter the interior of the first device, then the first charging interface 800, the corresponding first charging port 930 and the second The discharge interface also enters into the interior of the first device. Then, when the battery pack 10 supplies a large current to the first device, not only the first charging interface 800 and the first charging port 930 are covered, so that the battery pack 10 cannot be charged. At the same time, the second discharge interface 720 for cooperating with the second device will also be covered, so that the battery pack 10 cannot simultaneously discharge the first device and the second device. Since the output target currents of the first discharge interface 710 and the second discharge interface 720 are different in size, the battery pack 10 is prevented from simultaneously discharging the first device and the second device, improving the safety performance of the battery pack 10 and prolonging its service life.

The above description is only the preferred embodiment of the application, and does not limit the application in any form. Although the application has disclosed the above with the preferred embodiment, it is not used to limit the application. Anyone who is familiar with this professional technology Personnel, without departing from the scope of the technical solution of the present application, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present application, according to the technical content of the present application Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence of the application still fall within the scope of the technical solution of the application.

Claims (36)

1. A battery pack for adapting a first device or a second device, the battery pack comprising:

an electrical core assembly;

the power management module is electrically connected with the power core assembly and used for converting the input voltage of the power core assembly into a first target current for supplying power to the first equipment and converting the input voltage of the power core assembly into a second target current for supplying power to the second equipment;

the circuit board assembly is electrically connected with the battery pack assembly and the power management module, the circuit board assembly comprises a first circuit board and a second circuit board, the power management module, the first circuit board and the second circuit board are located at the same end of the battery pack, and the power management module is fixed on the first circuit board and the second circuit board.

2. The battery pack of claim 1, wherein the first circuit board and the second circuit board are perpendicular to each other.

3. The battery pack of claim 2, further comprising a support frame for securing the electrical core assembly; the first circuit board and the second circuit board are fixed on the support framework and/or the electric core assembly; or,

the battery pack further comprises a housing assembly, and the first circuit board and/or the second circuit board are/is fixed to the housing assembly.

4. The battery pack according to claim 3, wherein the first circuit board and the second circuit board are fixedly connected to the support frame, respectively, and the first circuit board and the second circuit board are connected by a wire.

5. The battery pack according to claim 3, wherein the second circuit board is located in a plane perpendicular to an axial direction of the electric core assembly; the electric core component comprises a first electrode and a second electrode;

the battery pack further comprises a nickel sheet assembly, the nickel sheet assembly is fixed on the second circuit board and electrically connected to the first electrode and the second electrode of the electric core assembly, and the nickel sheet assembly is used for electrically connecting the first electrode and the second electrode of the electric core assembly to the second circuit board.

6. The battery pack of claim 3, wherein the first circuit board and the second circuit board enclose a receiving space for receiving the power management module;

the horizontal orthographic projection of the accommodating space is smaller than or equal to the horizontal orthographic projection of the whole formed by the first circuit board and the second circuit board, and the vertical projection of the accommodating space is smaller than or equal to the vertical projection of the whole formed by the first circuit board and the second circuit board.

7. The battery pack of claim 1, wherein the first circuit board and the second circuit board are parallel to each other, the second circuit board being fixed to the first circuit board.

8. The battery pack of claim 7, wherein the circuit board assembly further comprises a conductive post, and two ends of the conductive post are fixedly connected with and electrically connected with the first circuit board and the second circuit board.

9. The battery pack of claim 7, further comprising a support frame for securing the electric core assembly;

the first circuit board is arranged below the second circuit board and fixedly connected to the supporting framework.

10. The battery pack according to claim 7, wherein the first circuit board and the second circuit board are spaced apart from each other and enclose an accommodating space for accommodating the power management module.

11. The battery pack of claim 1, further comprising a support frame for securing the battery cell assembly, the support frame comprising:

a first support part for supporting the cell assembly;

a second supporting part for supporting the circuit board assembly;

the first supporting part and the second supporting part are arranged along the length direction of the battery pack, and the length direction of the battery pack is parallel to the axial direction of the battery cell assembly.

12. The battery pack of claim 11, wherein the cell assembly comprises at least one cell; the first supporting part comprises an arc-shaped supporting end face, and the supporting end face abuts against the side face of the battery cell.

13. The battery pack according to claim 12, wherein the supporting end surface extends from one end of the second supporting portion to the other end of the second supporting portion; or the supporting end faces are only located at two ends of the first supporting part and are used for supporting two ends of the electric core assembly.

14. The battery pack of claim 11, wherein a first heat sink is formed below the first support, and at least a portion of the battery cell assembly is exposed through the first heat sink.

15. The battery pack of claim 11, wherein the first support includes a positioning end plate at an end of the first support remote from the second support, the end of the cell assembly abutting against the positioning end plate;

the positioning end plate is provided with a second heat dissipation groove which penetrates through the positioning end plate, and at least part of the electric core assembly is exposed through the second heat dissipation groove.

16. The battery pack according to claim 15, further comprising a nickel tab assembly fixedly coupled to the electric core assembly, the nickel tab assembly including a positioning part fixed to an end of the electric core assembly;

and at least part of the positioning part positioned at one end of the electric core assembly, which is far away from the second supporting part, is positioned in the second heat dissipation groove.

17. The battery pack of claim 1, further comprising a housing assembly and a support frame for securing the battery pack assembly, wherein at least a portion of the power management module, the battery pack assembly, the circuit board assembly, and the support frame are disposed within the housing assembly.

18. The battery pack of claim 17, wherein the housing assembly comprises:

the electric core assembly, the circuit board assembly and the supporting framework penetrate through the shell, and a positioning notch is formed in the shell;

the latch groove is fixed in the positioning notch, a concave buckle position is arranged on the latch groove, and when the battery pack is matched with the first equipment, the buckle position on the latch groove is matched with the positioning device on the first equipment.

19. The battery pack according to claim 18, wherein one end of the latch groove is provided with a projection extending outward, and an upper surface of the projection abuts against an inner wall surface of the case.

20. The battery pack of claim 18, wherein the latch slot comprises an arcuate abutment surface that abuts against a side surface of the cell.

21. The battery pack of claim 18, wherein the housing has openings at both ends in the length direction, namely a first opening and a second opening, and the positioning notch is disposed at an end away from the first opening;

the shell assembly further comprises a limiting end plate, and the limiting end plate is fixed to the second opening; the electric core assembly, the circuit board assembly and the supporting framework enter the inner part of the shell through the first opening.

22. The battery pack of claim 21, wherein the support backbone includes a positioning end plate that abuts an end of the cell assembly distal from the circuit board assembly; one end of the latch groove far away from the first opening abuts against the positioning end plate;

the shell assembly further comprises a fastener, and the fastener is fixedly connected with the limiting end plate, the supporting framework and the latch slot in sequence.

23. The battery pack of claim 22, wherein edges of the latch slot remote from the first opening extend outwardly to form a shield, and a plane of an end surface of the shield remote from the first opening coincides with a plane of an end surface of the housing remote from the first opening.

24. The battery pack of claim 23, wherein the housing assembly further comprises a decorative end plate secured to the second opening and abutting the retention end plate; the end face, far away from the first opening, of the decorative end plate, the plane where the end face, far away from the first opening, of the shielding portion is located and the plane where the end face, far away from the first opening, of the shell is located coincide.

25. The battery pack of claim 1, further comprising:

a first discharge interface for mating with the first device and providing power support for the first device;

the first charging interface is used for being matched with power supply equipment and supplying power to the battery pack;

the first discharging interface and the first charging interface are both located at one end, close to the circuit board assembly, of the battery pack.

26. The battery pack of claim 1, wherein the battery pack further comprises a second discharge interface for mating with and providing power support for the second device;

the battery pack comprises an interface end plate, the interface end plate is arranged at one end, close to the circuit board assembly, of the battery pack, and the surface of the interface end plate is inwards recessed to form a positioning space used for containing the second discharging interface.

27. The battery pack of claim 26, wherein the second discharge interface comprises a lead portion and an interface portion; the positioning space comprises a first positioning cavity for accommodating the wire part and a second positioning cavity for accommodating the interface part;

the first positioning cavity is arranged on the interface end plate in a bending mode; and/or at least part of the second positioning cavity extends inwards along the length direction of the battery pack.

28. The battery pack of claim 27, further comprising a support backbone for securing the battery cell assembly, the interface end plate being at least part of the support backbone; or, the battery pack further comprises a housing assembly for accommodating the power management module, the core assembly and the circuit board assembly, and the interface end plate serves as at least part of the housing assembly.

29. The battery pack of any one of claims 1-28, wherein the electrical core assembly further comprises a first electrode and a second electrode;

the battery pack also comprises a nickel sheet assembly, wherein the nickel sheet assembly comprises a first connecting part fixedly connected with the first electrode and a second connecting part fixedly connected with the second electrode; at least parts of the first connecting part and the second connecting part are bent and penetrate through the circuit board assembly, and the first electrode and the second electrode are electrically connected to the circuit board assembly.

30. The battery pack of any one of claims 1-28, wherein the power management module comprises:

the first power management module is fixed on the first circuit board and used for converting input voltage into first target output current, and the first target output current is used for supplying power to the first equipment;

and the second power management module is fixed on the second circuit board and used for converting the input voltage into second target output current, and the second target output current is used for supplying power to the second equipment.

31. The battery pack of any one of claims 1-28, wherein the circuit board assembly further comprises a button circuit board, the battery pack further comprising a support frame for securing the electrical core assembly;

the button circuit board is fixed on the support framework, is electrically connected to the first circuit board and/or the second circuit board, and is used for controlling charging and discharging of the battery pack;

the whole that first circuit board and/or the second circuit board formed with the button circuit board set up in the relative both ends that set up of electric core subassembly along the axial.

32. The battery pack of claim 31, wherein the button circuit board is provided with an indicator light for displaying charging and discharging conditions of the battery pack and displaying electric quantity of the electric core assembly.

33. The battery pack of claim 32, wherein the support backbone includes a positioning end plate distal from the first and second circuit boards for abutting the electrical core assembly; the button circuit board is fixed in the one end of keeping away from of location end plate electricity core subassembly.

34. The battery pack of claim 33, wherein an end of the positioning end plate away from the electric core assembly extends outward to form a plurality of positioning posts, the positioning posts enclose a clamping space for clamping the button circuit board, and the button circuit board is fixed in the clamping space.

35. The battery pack of any one of claims 1-28, wherein the first target current is greater than the second target current.

36. A battery pack is characterized by comprising a battery pack core component, a power management module and a circuit board component;

the circuit board assembly comprises a first circuit board and a second circuit board which are arranged in a staggered mode; the first circuit board and the second circuit board are arranged on the same side of the electric core assembly;

the power management module comprises a first power management module and a second power management module, wherein the first power management module is arranged on the first circuit board, and the second power management module is arranged on the second circuit board.

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