CN220368059U - battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and specifically to a battery device. The battery device includes a battery pack and a heat exchange component. The battery pack includes a plurality of batteries. A plurality of the batteries are arranged in sequence. The battery includes a casing. and a breathing mechanism, the housing includes two oppositely arranged first surfaces and a plurality of second surfaces located between the two first surfaces, the area of the first surface is larger than the area of the second surface, so The first surfaces of two adjacent batteries in the battery pack are opposite to each other, the breathing mechanism is provided on the casing, the breathing mechanism includes a breathing film, and the breathing film is used to discharge gas in the casing; The heat exchange assembly includes a heat exchange plate, and the heat exchange plate is disposed between the first surfaces of two adjacent batteries to exchange heat for the batteries. It can improve the safety of battery devices.

Description

battery device

Technical field

The present disclosure relates to the field of battery technology, and in particular, to a battery device.

Background technique

Electric vehicles are often provided with a battery device, and the battery device is used to provide power to the electric vehicle. The battery device may include a battery and a heat exchange plate, the heat exchange plate being at least partially in contact with the battery to cool the battery. At present, people have higher and higher requirements for the fast charging capability of the battery. When the battery is fast charged, the charging power is large, causing the battery to heat up seriously. In conventional technology, the heat dissipation needs of the battery cannot be met by setting a heat exchange plate at the bottom of the battery, and the battery is in use during use. Expansion will occur in the battery. After the battery expands, the contact area between the battery and the heat exchange plate is reduced, which in turn causes the heat exchange plate to reduce the cooling capacity of the battery, causing the battery temperature to rise and reducing the safety of the battery device.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Contents of the invention

An object of the present disclosure is to provide a battery device, thereby improving the safety of the battery device at least to a certain extent.

The present disclosure provides a battery device, which includes:

A battery pack, the battery pack includes a plurality of batteries, the plurality of batteries are arranged in sequence, the battery includes a casing and a breathing mechanism, the casing includes two oppositely arranged first surfaces and a plurality of first surfaces located on the two first surfaces. The second surface between the surfaces, the area of the first surface is greater than the area of the second surface, the first surfaces of two adjacent batteries in the battery pack are opposite, and the breathing mechanism is arranged on the casing , the breathing mechanism includes a breathing film, the breathing film is used to discharge gas in the housing;

A heat exchange assembly, the heat exchange assembly includes a heat exchange plate, and the heat exchange plate is disposed between the first surfaces of two adjacent batteries to exchange heat for the batteries.

The battery device provided by the embodiment of the present disclosure includes a battery pack and a heat exchange plate. The battery pack includes a plurality of batteries. The battery casing has two oppositely arranged first surfaces and a plurality of second surfaces located between the first surfaces. The area of the first surface is larger than the area of the second surface. The heat exchange plate is disposed between the first surfaces of two adjacent batteries. By contacting the heat exchange plate with the first surface of the battery, the heat dissipation area of the battery is increased. It solves the problem of insufficient heat exchange capacity in the related technology of installing a heat exchange plate at the bottom of the battery, which can effectively reduce the risk of safety accidents in the battery, and is equipped with a breathing mechanism on the outer shell to discharge the gas in the battery through the breathing membrane. , and then relieve the pressure of the battery, inhibit the expansion of the battery, avoid the problem of the reduction of the contact area between the battery and the heat exchange plate caused by the deformation of the first surface when the battery expands, ensure the heat dissipation capacity of the battery device, and thereby improve the battery device security.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a battery device provided by an exemplary embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of a battery provided by an exemplary embodiment of the present disclosure;

Figure 3 is a partial explosion schematic diagram of a battery provided by an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another battery device provided by an exemplary embodiment of the present disclosure.

Detailed ways

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Therefore, it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise expressly stated and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" is refers to two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of a possible plurality of such objects.

Unless otherwise specified or stated, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal. Connection; "Connection" can be a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

Further, in the description of the present disclosure, it should be understood that the directional terms such as “upper”, “lower”, “inner”, and “outer” described in the exemplary embodiments of the present disclosure are from the angle shown in the drawings. This description should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that when the context refers to one element or feature being connected to "on", "below", "in" or "outside" another element(s), it is not merely directly connected. "on", "below" or "inside" or "outside" another element (one or more), or can also be indirectly connected to another element (one or more) "on", "below" or "outside" through an intermediate element. inside and outside".

Exemplary embodiments of the present disclosure provide a battery device. As shown in Figures 1-3, the battery device includes: a battery pack 10 and a heat exchange assembly 20. The battery pack 10 includes a plurality of batteries 11. The multiple batteries 11 are arranged in sequence. 11 includes a housing 110 and a breathing mechanism 120. The housing 110 includes two opposite first surfaces and a plurality of second surfaces located between the two first surfaces. The area of the first surface is larger than the area of the second surface. The battery pack 10 The first surfaces of the two adjacent batteries 11 are opposite, and the breathing mechanism 120 is provided on the casing 110. The breathing mechanism 120 includes a breathing film 104. The breathing film 104 is used to discharge the gas in the casing 110; the heat exchange assembly 20 includes a heat exchanger. The heat exchange plate 21 is disposed between the first surfaces of two adjacent batteries 11 to exchange heat between the batteries 11 .

The battery device provided by the embodiment of the present disclosure includes a battery pack 10 and a heat exchange plate 21. The battery pack 10 includes a plurality of batteries 11. The casing 110 of the battery 11 has two oppositely arranged first surfaces and a plurality of first surfaces located between the first surfaces. The area of the first surface is larger than the area of the second surface. The heat exchange plate 21 is disposed between the first surfaces of the two adjacent batteries 11. Through the heat exchange plate 21 and the first surface of the battery 11 contact, increasing the heat dissipation area of the battery 11, solving the problem of insufficient heat exchange capacity in the related technology of installing a heat exchange plate at the bottom of the battery 11, which can effectively reduce the risk of safety accidents in the battery 11, and on the casing 110 A breathing mechanism 120 is provided to discharge the gas in the battery 11 through the breathing membrane 104, thereby releasing the pressure of the battery 11, suppressing the expansion of the battery 11, and avoiding the deformation of the first surface of the battery 11 when the battery 11 expands and heat exchange. The problem of reducing the contact area of the plate 21 ensures the heat dissipation capability of the battery 11 device, thereby improving the safety of the battery device.

Further, as shown in Figure 4, the battery device provided by the embodiment of the present disclosure may also include a box 30. The box 30 includes a bottom plate and a frame. The frame and the bottom plate are connected to form an accommodation space. The battery pack 10 and the heat exchange plate 21 are provided. in this accommodation space.

Each part of the battery device provided by the embodiment of the present disclosure will be described in detail below:

The battery 11 includes a casing 110, a battery core, a breathing mechanism 120 and a pole 130. The casing 110 has an accommodation cavity, the battery core is located in the accommodation cavity, the breathing mechanism 120 and the pole 130 are located in the casing 110, and the pole 130 and the pole 130 are arranged in the housing 110. core electrical connection. The breathing mechanism 120 includes a breathing film 121, and the breathing film 121 is breathable, so the breathing mechanism 120 can discharge the gas inside the battery 11 in time during the charging and discharging process of the battery 11. The gas in the housing 110 is discharged in time through the breathing mechanism 120 to avoid excessive pressure in the housing 110 .

The housing 110 may include two first surfaces located opposite each other and a second surface located between the two first surfaces, and the area of the first surface is greater than the area of the second surface. For example, the battery 11 may be a rectangular parallelepiped or a nearly rectangular parallelepiped structure (for example, the overall outline of the battery 11 is a rectangular parallelepiped, and the edges of the rectangular parallelepiped are provided with chamfers or rounded corners, and the rectangular parallelepiped is provided with protrusions or depressions, which can be considered as Cuboid or approximately cuboid structure). At this time, the housing 110 includes two opposite first surfaces and four second surfaces. The first surface is rectangular, and the four second surfaces are connected in sequence to form a rectangular frame. The two first surfaces are respectively connected to two sides of the rectangular frame. end. The breathing mechanism 120 can be disposed on the second surface of the housing 110 to avoid interference between the breathing mechanism 120 and the liquid cooling area on the first surface, which is detrimental to the heat dissipation of the battery by the heat exchange assembly 20 .

It can be understood that in the embodiment of the present disclosure, the battery 11 may also have other shapes. For example, the battery 11 may be a triangular prism battery, a pentagonal prism battery, or a hexagonal prism battery 11. When the battery 11 is a triangular prism battery, the first surface of the casing 110 is triangular, and the casing 110 has three second surfaces; when the battery 11 is a pentagonal prism battery, the first surface of the casing 110 is pentagonal, and the casing 110 has Five second surfaces; when the battery 11 is a hexagonal prism battery, the first surface of the casing 110 is hexagonal, and the casing 110 has six second surfaces.

The battery pack 10 includes a plurality of batteries 11 arranged in sequence. The first surfaces of two adjacent batteries 11 in the battery pack 10 are opposite to each other, that is, the batteries 11 are stacked on a large surface. A heat exchange plate 21 is provided between two adjacent batteries 11, and the heat exchange plate 21 is in contact with the first surface of the battery 11, or a thermal conductive adhesive layer is provided between the heat exchange plate 21 and the first surface of the battery 11. The thermal conductive adhesive layer is connected to the heat exchange plate 21 and the battery 11 respectively.

The casing 110 is used to form the outline of the battery 11 and protect the battery cells and other devices in the casing 110 . The shell 110 may include a shell body 102 and a cover plate 101. One end of the shell body 102 has an opening. The cover plate 101 is connected to the shell body 102, and the cover plate 101 blocks the opening on the shell body 102.

The shell body 102 may include an end plate and a cylinder, the cover plate 101 is connected to the cylinder, and the end plate is located at an end of the cylinder away from the cover plate 101 . The cylinder has a cylindrical structure with openings at both ends. The cover plate 101 and the side plates are flat plates. The cover plate 101 and the side plates respectively block the openings at both ends of the cylinder.

At least one of the cover plate 101 and the end plate and the barrel have a separate molding structure. For example, the cover plate 101 and the barrel have a separate structure, and the end plate and the barrel have an integrated structure. The cover plate 101 and the barrel are welded. Or connected by riveting. Alternatively, the end plate and the cylinder have a separate structure, the cover plate 101 and the cylinder have an integral structure, and the end plate and the cylinder are connected by welding or riveting. Alternatively, the end plate and the cover plate 101 are separated from the cylinder, and the cover plate 101 and the end plate are connected to the cylinder by welding or riveting.

The cover plate 101 forms a second surface of the housing 110 and the end plate forms a second surface of the housing 110 . The pole 130 can be provided on the cover 101. For example, the cover 101 can be provided with a first pole and a second pole, and the first pole and the second pole are electrically connected to the battery core respectively. The breathing mechanism 120 can be disposed on the cover 101 or the end plate so that the breathing mechanism 120 and the heat exchange component 20 are not on the same plane, thereby avoiding interference between the breathing mechanism 120 and the heat exchange component 20 and affecting the heat dissipation of the battery by the heat exchange component. Of course, the breathing mechanism 120 can also be provided on the first surface of the housing 110, and the embodiment of the present disclosure is not limited thereto.

The battery core is disposed in the housing 110. The battery core may include a battery core body, first tabs and second tabs. The first tabs and second tabs extend from the battery body. For example, the first tab and the second tab extend from an end of the cell body close to the cover 101 . Of course, in practical applications, the first pole and the second pole may also be distributed in other ways, and the embodiments of the present disclosure are not limited thereto.

The battery core includes a first pole piece, a second pole piece and a diaphragm. The first pole piece, the diaphragm and the second pole piece are integrated into the battery core. The first pole piece may include a positive electrode current collector and an active material layer (the active material layer may be a nickel-cobalt-manganese ternary active material, such as _LiNix Co _y Mn _1-xy O ₂ , where x is greater than or equal to 0.5.), and the active material The layer is provided on the positive electrode current collector, the second pole piece may include a negative electrode current collector and a negative electrode coating, and the negative electrode coating is coated on the negative electrode current collector.

In one embodiment, the battery 11 is a stacked battery, which is not only easy to assemble, but also can be processed to obtain a longer battery. Specifically, the battery core is a laminated battery core. The battery core has first pole pieces stacked on each other, a second pole piece electrically opposite to the first pole piece, and is arranged between the first pole piece and the second pole piece. diaphragm pieces, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery core.

Optionally, the battery 11 may be a wound battery, that is, a first pole piece, a second pole piece electrically opposite to the first pole piece, and a separator piece disposed between the first pole piece and the second pole piece. Winding to obtain a wound battery core.

The battery core may be a push-out battery core, that is, the first tab and the second tab extend from the side of the battery core body toward the cover 101, and the positions of the first tab and the second tab are respectively and The positions of the first pole and the second pole are corresponding.

It can be understood that the battery core may also be a side-out type battery core, with the first pole tab and the second pole tab respectively leading out from both sides of the battery core body. The first tab is located between the battery core body and the first side of the housing 110 , and the second tab is located between the battery core body and the second side of the housing 110 . The first side and the second side of the housing 110 are opposite, and the first side and the second side are respectively located on both sides of the end surface of the housing 110 and are perpendicular to the bottom plate. When the battery 11 is a side-out battery cell, the first tab and the first pole are connected through a first adapter. The first adapter has a right-angle structure. One side of the right angle is connected to the first tab, and the other side of the right angle is connected to the first tab. One side is connected to the first pole. The second tab and the second pole are connected through a second adapter. The second adapter has a right-angle structure. One side of the right angle is connected to the second tab, and the other side of the right angle is connected to the second pole.

The breathing mechanism 120 is provided on the housing 110. For example, the breathing mechanism 120 can be provided on the first surface or the second surface of the housing 110. When the breathing mechanism 120 is disposed on the first surface of the casing 110, in order to ensure that the first surface of the casing 110 is in close contact with the heat exchange plate 21, a recessed portion may be provided on the first surface of the casing 110, and the breathing mechanism 120 is disposed on the first surface of the casing 110. depression. The breathing mechanism 120 can have a certain ventilation function when the pressure in the battery 11 reaches a predetermined value, thereby achieving the purpose of one-way exhaust. In addition, the breathing mechanism 120 with a breathing effect can provide ventilation when the pressure is lower than a predetermined value. Able to be completely sealed.

In a feasible implementation, the breathing mechanism 120 includes a breathing membrane 104 , a breathing hole 106 is provided on the housing 110 , the breathing membrane 104 is connected to the housing 110 , and the breathing membrane 104 covers the breathing hole 106 . The breathing film 104 includes a polymer material. Polymer materials generally have breathable and water-blocking properties, so that the breathing film 104 can stably discharge the gas generated inside the battery while blocking the infiltration of external moisture. For example, polymer materials can be selected from FEP (fluorinated ethylene propylene copolymer), PCTFE (polychlorotrifluoroethylene), etc.

One or more breathing holes 106 may be provided on the housing 110 , and one or more breathing holes 106 may be provided on one surface (the first surface or the second surface) of the housing 110 . The breathing film 104 is connected to the surface of the housing 110 on which the breathing holes 106 are provided. The breathing film 104 can be connected by adhesion or hot melt connection.

When multiple breathing holes 106 are provided on the housing 110 , the plurality of breathing holes 106 are arranged at intervals, and the breathing film 104 is connected to the surface of the housing 110 around the breathing holes 106 , that is, the breathing film 104 is added by being connected to the housing 110 The strength of the breathing hole 106 avoids the problem that the breathing membrane 104 has low strength and is easily torn due to an excessively large area of the breathing hole 106 .

In another feasible embodiment of the present disclosure, the breathing mechanism 120 includes a connecting seat 103 and a breathing membrane 104. The housing 110 is provided with a mounting hole 105. The connecting seat 103 is connected to the housing 110, and the connecting seat 103 blocks the mounting hole 105. The connecting seat 103 is provided with a breathing hole 106; the breathing film 104 is connected to the connecting seat 103, and the breathing film 104 covers the breathing hole 106.

Among them, one or more breathing holes 106 may be provided on the connecting seat 103, and the breathing film 104 covers the one or more breathing holes 106. When multiple breathing holes 106 are provided on the connecting seat 103, the plurality of breathing holes 106 are arranged at intervals, and the breathing membrane 104 is connected to the surface of the connecting seat 103 around the breathing holes 106, that is, by being connected to the connecting seat 103, the breathing film 104 is connected to the connecting seat 103. The strength of the breathing membrane 104 avoids the problem that the breathing membrane 104 has low strength and is easily torn due to an excessively large ventilation hole area.

The breathing film 104 can be disposed on the side of the connecting seat 103 away from the battery core, or the breathing film 104 can be disposed on the side of the connecting seat 103 close to the battery core, or the breathing film 104 can be embedded in the connecting seat 103 . The respiratory membrane 104 and the connection base 103 may be connected by bonding or hot-melt connection.

The connecting seat 103 may have a rectangular structure, an elliptical structure or a circular structure, which is not specifically limited in the embodiment of the present disclosure. The breathing film 104 covers the connecting seat 103. The connecting seat 103 can also only be provided with a periphery of the breathing holes. The connecting seat 103 includes two layers, with the breathing film 104 sandwiched between the two layers.

The heat exchange assembly 20 may include a heat exchange plate 21 and a liquid collection part 22. The heat exchange plate 21 is provided between the first surfaces of two adjacent batteries 11, and the liquid collection part 22 is provided at the end of the heat exchange plate 21. The heat exchange plate 21 and the liquid collecting part 22 are connected. The liquid collecting part 22 is used to input the cooling medium into the heat exchange plate 21 , or the liquid collecting part 22 is used to output the cooling medium in the heat exchange plate 21 . For example, the heat exchange assembly 20 may include a first liquid collecting member and a second liquid collecting member. The first liquid collecting member and the second liquid collecting member are respectively provided at both ends of the heat exchange plate 21 . The first liquid collecting member is an inlet. The liquid collecting part 22, the second liquid collecting part is the liquid outlet liquid collecting part 22.

The heat exchange plate 21 is provided with a heat exchange space for transmitting the heat exchange medium. The thickness of the heat exchange plate 21 is W1. The wall thickness of the heat exchange plate is W2. The ratio range of W2 and W1 is 0.03-0.5. The heat exchange plate 21 The thickness of is the distance from one end surface to the other end surface of the heat exchange plate 21 along the arrangement direction of the batteries 11 (that is, the thickness of the heat exchange plate 21 is the sum of the wall thickness of the heat exchange plate and the thickness of the heat exchange space). For example, the ratio of W2 to W1 is 0.03, 0.05, 0.1, 0.2 or 0.5, etc. By setting the ratio range of W2 and W1 to 0.03-0.5, on the one hand, sufficient heat exchange space is ensured in the heat exchange plate 21 to improve the heat exchange efficiency, and on the other hand, the wall thickness of the heat exchange plate 21 is ensured.

The thickness of the heat exchange plate 21 is 3 mm to 15 mm, and the thickness of the heat exchange plate 21 is the size of the heat exchange plate 21 along the arrangement direction of the batteries 11 . For example, the thickness of the heat exchange plate 21 can be 3mm, 4mm, 6mm, 10mm, 11mm or 15mm, etc. The thickness of the heat exchange plate 21 is greater than 3mm, which ensures that there is enough space within the heat exchange plate 21 to transmit the heat exchange medium. The thickness of the heat exchange plate 21 is less than 15mm, which prevents the heat exchange plate 21 from occupying too much space in the battery device, which is beneficial to Ensure the energy density of battery devices. Although the heat exchange plate 21 with a thickness of 3mm-15mm can meet the requirements for heat exchange and energy density, the heat exchanger plate 21 with a thickness of 3mm-15mm has a small thickness. The battery 11 expands during the charging and discharging process, which easily causes heat exchange. Plate 21 is deformed. In the embodiment of the present disclosure, by providing the breathing mechanism 120 on the battery 11, the pressure inside the battery 11 can be reduced, thereby reducing the pressure of the battery 11 on the heat exchange plate 21, and avoiding deformation of the heat exchange plate 21.

The heat exchange space is used to transport the heat exchange medium. The heat exchange space extends from one end of the heat exchange plate 21 to the other end of the heat exchange plate 21, that is, the heat exchange space runs through the heat exchange plate 21. One end of the heat exchange space is connected to the first liquid collecting member, and the other end of the heat exchange space is connected to the first liquid collecting member. One end is connected to the second liquid collection piece.

A dividing rib 211 is provided in the heat exchange space, and the dividing rib 211 divides the heat exchange space into a plurality of heat exchange channels. The dividing ribs 211 can divide the heat exchange space into multiple uniform heat exchange channels, or the dividing ribs 211 can divide the heat exchange space into uneven heat exchange channels.

For example, the heat exchange plate 21 may include a first heat exchange surface and a second heat exchange surface. The first heat exchange surface and the second heat exchange surface are parallel, and there is a gap between the first heat exchange surface and the second heat exchange surface. . The wall thickness of the heat exchange plate 21 is the thickness of the first heat exchange surface or the second heat exchange surface, whichever is smaller. The interval between the first heat exchange surface and the second heat exchange surface forms a heat exchange space. The first heat exchange surface is opposite to the first surface of the first battery, and the second heat exchange surface is opposite to the first surface of the second battery. The first battery and the second battery are two adjacent batteries 11 in the battery pack 10 . The partition ribs 211 are respectively connected to the first panel and the second panel, and the partition ribs 211 extend from one end of the heat exchange plate 21 to the other end of the heat exchange plate 21 .

The height of the heat exchange plate 21 is H1, the height of the battery 11 is H2, the ratio range of H1 and H2 is 0.85-0.99, the height of the heat exchange plate 21 is the size of the heat exchange plate 21 in the direction perpendicular to the bottom plate, and the battery 11 The height of is the size of the battery 11 in the direction perpendicular to the bottom plate. For example, the ratio of H1 and H2 can be 0.85, 0.88, 0.9, 0.91 or 0.95, etc. The ratio range of H1 and H2 is greater than or equal to 0.85, which ensures the contact area between the heat exchange plate 21 and the first surface of the battery 11, which is beneficial to improving the heat dissipation efficiency of the battery device; the ratio range of H1 and H2 is less than or equal to 0.99, avoiding heat exchange The board 21 interferes with busbars or wire harness components, etc., which is beneficial to improving space utilization in the battery device.

It should be noted that in the embodiment of the present disclosure, the heat exchange plate 21 is not limited to a plate-shaped structure. The heat exchange plate 21 can also be of other structures. For example, the heat exchange plate 21 can also be of a tubular structure. That is, in this disclosure, the heat exchange plate 21 can also be of a tubular structure. The name heat exchange plate in the disclosed embodiments does not represent a limitation on the shape of the heat exchange plate.

The box 30 may include a bottom plate and a frame. The frame and the bottom plate are connected, and the frame and the bottom plate form at least one battery compartment, and the battery pack 10 is disposed in the battery compartment. The heat exchange assembly 20 and the battery pack 10 can also be located in the battery compartment.

For example, the box 30 may have a rectangular parallelepiped or approximately rectangular parallelepiped structure. The bottom plate has a flat structure and supports the battery pack 10 . The frame may include a first side, a second side, a third side and a fourth side, and the first side, the second side, the third side and the fourth side are connected end to end in order to form a rectangular frame. One or more dividing beams may be provided in the frame, and the dividing beams divide the space in the frame into multiple battery compartments. For example, a first dividing beam and a second dividing beam arranged vertically are provided in the frame. The first dividing beam and the second dividing beam divide the space in the frame into four battery compartments.

The breathing mechanism 120 is provided on the top surface of the battery 11; and/or the breathing mechanism 120 is provided on the bottom surface of the battery 11. The bottom surface of the battery 11 is the side of the battery facing the bottom plate, and the top surface of the battery is the side of the battery facing away from the bottom plate. That is, the breathing mechanism 120 is disposed on at least one side along the height direction of the box 30 , and the gas can be discharged to the bottom of the box 30 or the upper part of the box, and then discharged outside the box.

Furthermore, the battery device provided by the embodiment of the present disclosure may also include a busbar and a power management system. The busbar is provided in the box 30 , and the busbar electrically connects (series or parallel) the multiple batteries 11 in the battery pack 10 . The power management system is provided in the box 30 , and is used to manage charge and discharge of the battery 11 , thermal management of the battery 11 , etc.

The battery device provided by the embodiment of the present disclosure includes a battery pack 10 and a heat exchange plate 21. The battery pack 10 includes a plurality of batteries 11. The casing 110 of the battery 11 has two oppositely arranged first surfaces and a plurality of first surfaces located between the first surfaces. The area of the first surface is larger than the area of the second surface. The heat exchange plate 21 is disposed between the first surfaces of the two adjacent batteries 11. Through the heat exchange plate 21 and the first surface of the battery 11 contact, increasing the heat dissipation area of the battery 11, solving the problem of insufficient heat exchange capacity in the related technology of installing a heat exchange plate at the bottom of the battery 11, which can effectively reduce the risk of safety accidents in the battery 11, and on the casing 110 A breathing mechanism 120 is provided to discharge the gas in the battery 11 through the breathing membrane 104, thereby releasing the pressure of the battery 11, suppressing the expansion of the battery 11, and avoiding the deformation of the first surface of the battery 11 when the battery 11 expands and heat exchange. The problem of reducing the contact area of the plate 21 ensures the heat dissipation capability of the battery 11 device, thereby improving the safety of the battery device.

The battery device provided by the embodiment of the present disclosure can be applied to an electric vehicle. When the battery device is used in an electric vehicle, the battery device can be a battery pack. The battery pack is installed on the electric vehicle to provide energy to the electric vehicle.

In practical applications, the battery pack can be installed on the frame of an electric vehicle. The battery pack can be fixedly connected to the vehicle frame. Or the battery pack can be a modular battery pack, and the modular battery pack can be detachably connected to the vehicle body for easy replacement.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common common sense or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (12)

1. A battery device, characterized in that the battery device includes: A battery pack, the battery pack includes a plurality of batteries, the plurality of batteries are arranged in sequence, the battery includes a casing and a breathing mechanism, the casing includes two oppositely arranged first surfaces and a plurality of first surfaces located on the two first surfaces. The second surface between the surfaces, the area of the first surface is greater than the area of the second surface, the first surfaces of two adjacent batteries in the battery pack are opposite, and the breathing mechanism is arranged on the casing , the breathing mechanism includes a breathing film, the breathing film is used to discharge gas in the housing; A heat exchange assembly, the heat exchange assembly includes a heat exchange plate, and the heat exchange plate is disposed between the first surfaces of two adjacent batteries to exchange heat for the batteries. 2. The battery device according to claim 1, wherein the casing is provided with a breathing hole, the breathing film is connected to the casing, and the breathing film covers the breathing hole. 3. The battery device according to claim 1, wherein the breathing mechanism includes: A connecting seat, the housing is provided with a mounting hole, the connecting seat is connected to the housing, and the connecting seat blocks the mounting hole, the connecting seat is provided with a breathing hole, the breathing film and the The connecting base is connected, and the breathing film covers the breathing hole. 4. The battery device according to claim 1, wherein the breathing mechanism is provided on the second surface of the housing. 5. The battery device according to claim 1, wherein the heat exchange plate is provided with a heat exchange space for transmitting heat exchange medium, the thickness of the heat exchange plate is W1, and the thickness of the heat exchange plate is W1. The wall thickness is W2, and the ratio of W2 to W1 ranges from 0.03 to 0.5. The thickness of the heat exchange plate is the distance from one end surface to the other end surface of the heat exchange plate along the arrangement direction of the battery. 6. The battery device according to claim 5, wherein the thickness of the heat exchange plate is 3mm-15mm. 7. The battery device according to claim 6, wherein a dividing rib is provided in the heat exchange space, and the dividing rib separates the heat exchange space into a plurality of heat exchange channels. 8. The battery device according to claim 1, wherein the heat exchange plate and the first surface of the adjacent battery are connected through a thermally conductive adhesive layer. 9. The battery device of claim 1, further comprising: A box body, the box body has a bottom plate, and the battery pack and the heat exchange plate are provided on the bottom plate; The height of the heat exchange plate is H1, the height of the battery is H2, the ratio range of H1 and H2 is 0.85-0.99, the height of the heat exchange plate is the height of the heat exchange plate in the direction perpendicular to the bottom plate. The height of the battery is the size of the battery in the direction perpendicular to the bottom plate. 10. The battery device according to claim 9, wherein the breathing mechanism is provided on the top surface of the battery; And/or, the breathing mechanism is provided on the bottom surface of the battery, the bottom surface of the battery is the side of the battery facing the bottom plate, and the top surface of the battery is the side of the battery facing away from the bottom plate. 11. The battery device according to claim 1, wherein the heat exchange component further comprises: A liquid collecting part is provided at the end of the heat exchange plate, and the liquid collecting part is in communication with the heat exchange plate. 12. The battery device according to any one of claims 1 to 11, wherein the battery is a rectangular parallelepiped battery.