CN223245857U - Top cover module and battery - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover module and a battery, wherein the top cover module comprises a top cover plate, a pole assembly, a riveting piece, a pole pad and an insulating piece, a pole hole is arranged on the top cover plate, the pole assembly comprises a pole body and a welding piece, the welding piece is welded at one end of the pole body, the pole body is arranged in the pole hole in a penetrating way, the welding piece is used for being connected with a pole lug of a core bag, the welding area of the same tab of welding piece and core package is two at least, and the riveting piece is connected in the other end of utmost point post body, and riveting piece and welding piece are located the both sides of top cap piece respectively, and utmost point post pad presss from both sides and locates between riveting piece and the top cap piece, and the insulating part presss from both sides and locates between welding piece and the top cap piece in order to make welding piece and the insulating setting of top cap piece. The top cover module has the advantages of simple structure, low manufacturing cost, small thickness of the whole top cover module, contribution to improving the energy density of the battery, strong overcurrent capacity of the whole top cover module and contribution to improving the performance of the battery.

Description

Top cap module and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a top cover module and a battery.

Background

Current prismatic cell construction innovations are mainly focused on the cell top cover and its components connected thereto. The current riveting battery top cover generally comprises a top cover plate, upper plastic, lower plastic and a pole piece penetrating through the top cover plate, wherein in the actual assembly process, the lower plastic is connected to the lower surface of the top cover plate, the upper plastic is installed on the upper surface of the top cover plate, the riveting piece is placed on the upper plastic, then a sealing piece is sleeved on the pole piece, the pole piece sequentially penetrates through the lower plastic and the upper plastic from the lower side of the top cover plate and then is connected with the riveting piece, and finally the upper end of the pole body is welded with the riveting piece in a riveting mode, so that the assembly of the battery top cover is completed. In the process of connecting the battery top cover with the core pack, the lug connecting sheet is welded with the lug of the core pack, and the welded assembly body is used for welding the lug connecting sheet with the lower surface of the pole piece. This kind of post spare of riveting battery top cap adopts the integrated into one piece's of machine tooling structure generally, and includes the post portion of minor diameter size and jumbo size welding portion, and post portion is used for riveting with the riveting piece, and welding portion is used for with the connection piece welding, leads to having great waste in post body production process, has promoted manufacturing cost, and the connection piece of setting up can lead to the thickness of whole battery top cap great, and the overflow ability is limited.

Disclosure of utility model

The first object of the present utility model is to provide a top cover module, which has a simple structure, low manufacturing cost, and a small thickness of the whole top cover module, so as to facilitate the improvement of the energy density of the battery, and has a strong overcurrent capability, so as to facilitate the improvement of the performance of the battery.

A second object of the present utility model is to provide a battery having a simple structure, low manufacturing cost, high energy density, and good charge and discharge performance.

To achieve the purpose, the utility model adopts the following technical scheme:

The utility model discloses a top cover module which comprises a top cover plate, a pole assembly, a pole pad and an insulating piece, wherein a pole hole is formed in the top cover plate, the pole assembly comprises a pole body and the welding piece, the welding piece is welded to one end of the pole body, the pole body penetrates through the pole hole, the welding piece is used for being connected with a pole lug of a core pack, at least two welding areas of the welding piece and the same pole lug of the core pack are formed, the riveting piece is connected to the other end of the pole body, the riveting piece and the welding piece are respectively located on two sides of the top cover plate, the pole pad is clamped between the riveting piece and the top cover plate, and the insulating piece is clamped between the welding piece and the top cover plate to enable the welding piece and the top cover plate to be arranged in an insulating mode.

In some embodiments, the welding member has a post assembly hole provided therethrough, one end of the post body is inserted into the post assembly hole, and the post body is welded to an assembly edge of the post assembly hole.

In some specific embodiments, the welding piece is provided with a welding groove surrounding the pole assembly hole, the pole body is provided with a welding boss corresponding to the welding groove, and a welding seam is formed between the outer side wall of the welding boss and the inner side wall of the welding groove.

In some embodiments, at least two of the weld areas are located on either side of the connection area of the pole body and the weld.

In some embodiments, the top cover module further comprises a sealing piece, the sealing piece is sleeved on the pole body, one part of the sealing piece is pressed between the outer peripheral wall of the pole body and the inner peripheral wall of the pole hole, the other part of the sealing piece is pressed between the pole body and/or the welding piece and the surface of the top cover piece facing the welding piece, a first exhaust channel communicated with the pole hole is formed between the riveting piece and the pole pad, and/or a second exhaust channel communicated with the pole hole is formed between the insulating piece and the top cover piece.

In some embodiments, the pole pad has a first mounting groove, the rivet has a stop portion and a collar portion connected, the stop portion is mounted to the first mounting groove, the collar portion is stopped against a surface of the pole pad where the first mounting groove is provided, and/or the pole pad has an insulating collar extending into the pole bore, the insulating collar is compressed between an outer sidewall of the pole body and an inner sidewall of the pole bore.

In some embodiments, the top cover plate is provided with a pole hole, the pole body, the riveting piece and the welding piece are one and form a positive pole or a negative pole of the battery, or the top cover plate is provided with two pole holes which are arranged at intervals, and the pole body, the riveting piece and the welding piece are two and form the positive pole and the negative pole respectively.

In some specific embodiments, the electrode body of the negative electrode comprises a negative electrode riveting part and a negative electrode welding part, the negative electrode riveting part is connected with the riveting piece and is the same as the material of the riveting piece, the negative electrode welding part is connected with the welding piece and is the same as the material of the welding piece, wherein one side of the insulating piece, which is away from the top cover plate, is provided with a supporting part, the negative electrode welding part is provided with a supporting step corresponding to the supporting part, and the supporting step and the supporting part are both abutted against the welding piece.

In some embodiments, the top cover plate is provided with two pole holes arranged at intervals, the pole body, the riveting piece and the welding piece are two, and the top cover module is also provided with a fool-proof structure for distinguishing the polarity of the pole body matched with the pole holes.

The utility model also discloses a battery, which comprises a shell, a core pack and the top cover module, wherein the shell is provided with an installation cavity, the installation cavity is provided with an open end, the core pack is arranged in the shell, the top cover module is buckled at the open end of the installation cavity, and a welding piece of the top cover module is connected with the lug of the core pack.

Compared with the prior art, the top cover module has the beneficial effects that only one welding mark is arranged on the lug connecting sheet and the core bag, and the welding areas of the welding piece and the same lug of the core bag are at least two, so that the overcurrent capacity of the whole top cover module is improved. And if the same overcurrent capacity as the prior art is to be realized, the size of the welding piece of the embodiment can be smaller than that of the lug connecting piece in the prior art, thereby being beneficial to reducing the manufacturing cost of the top cover module. Meanwhile, in the actual assembly process, the whole pole assembly is formed by connecting two split structures of the pole body and the welding piece, on one hand, compared with the prior art that the pole part and the welding part are integrally formed in a machining mode, the pole assembly of the embodiment can be manufactured by adopting fewer raw materials, and the manufacturing cost of the pole assembly is reduced. On the other hand as the welding piece of the part of utmost point post subassembly and the lug welding of core package, need not to adopt the lug connection piece among the prior art, reduced the thickness of top cap module to be favorable to promoting the energy density of battery.

The battery has the beneficial effects that the battery is simple in structure, low in manufacturing cost, high in energy density and good in charge and discharge performance due to the top cover module.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a top cover module according to a first embodiment of the utility model;

FIG. 2 is an exploded view of a top cover module according to a first embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating welding of a top cover module and a core wrap tab according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a cap module at a positive electrode post assembly according to an embodiment of the utility model

Fig. 5 is an exploded view of a cap module at a negative electrode column assembly according to an embodiment of the utility model

FIG. 6 is a cross-sectional view of a cap module at a positive post assembly according to a first embodiment of the present utility model;

fig. 7 is a cross-sectional view of a cap module at a negative electrode stem assembly according to a first embodiment of the present utility model;

Fig. 8 is a schematic structural view of a positive electrode post body according to the first embodiment of the present utility model;

Fig. 9 is a schematic structural view of a negative electrode body according to a first embodiment of the present utility model;

FIG. 10 is a schematic structural view of a positive electrode welding member according to the first embodiment of the present utility model;

Fig. 11 is a schematic structural view of a negative electrode welding member according to the first embodiment of the present utility model;

fig. 12 is a schematic structural view of a positive electrode post rivet according to a first embodiment of the present utility model;

Fig. 13 is a schematic structural view of a negative electrode post rivet according to the first embodiment of the present utility model;

Fig. 14 is a schematic structural view of an insulating member according to a first embodiment of the present utility model.

Fig. 15 is an exploded view of a battery according to a fourth embodiment of the present utility model.

Reference numerals:

10. A top cover module;

100. Cover plate, 101, positive pole hole, 102, negative pole hole, 103, second positive pole mounting groove, 1031, positive pole fool-proof groove, 104, second negative pole mounting groove, 1041, negative pole fool-proof groove, 105, explosion-proof valve mounting hole, 106, liquid injection hole;

210. The positive electrode post assembly comprises a positive electrode post body, a 211, a positive electrode welding boss, a 2112, a positive electrode riveting part, a 21121, a positive electrode riveting groove, a 2113, a positive electrode welding part, a 212, a positive electrode welding piece, a 2121, a positive electrode welding area, a 2122, a positive electrode post assembly hole, a 2123, a positive electrode welding groove, a 2124 and a positive electrode fool-proof surface;

220. The anode column comprises an anode column assembly 221, an anode column body 2211, an anode riveting part 22111, an anode riveting groove 2212, an anode welding part 22121, an anode welding boss 22122, a supporting step 222, an anode welding piece 2221, an anode welding area 2222, an anode column assembly hole 2223, an anode welding groove 2224 and an anode fool-proof surface;

310. Positive electrode riveting pieces, 311, positive electrode abutting parts, 3111, a first positive electrode sub-channel, 312, positive electrode convex ring parts, 320, negative electrode riveting pieces, 321, negative electrode abutting parts, 3211, a first negative electrode sub-channel, 322, and negative electrode convex ring parts;

410. Positive electrode column pad 411, first positive electrode mounting groove 412, second positive electrode sub-channel 413, positive electrode insulation convex ring 420, negative electrode column pad 421, first negative electrode mounting groove 422, second negative electrode sub-channel 423, negative electrode insulation convex ring;

500. insulating part 510, supporting part 511, annular convex edge 512, supporting rib 520, positive electrode perforation 530, negative electrode perforation 540, second positive electrode exhaust passage 550, second negative electrode exhaust passage 560, positive electrode foolproof convex edge 570, negative electrode foolproof convex edge 580, positive electrode positioning convex, 590, negative electrode positioning convex;

610. 611, first positive sealing ring, 612, second positive sealing ring;

620. a negative electrode seal 621, a first negative electrode seal ring 622, a second negative electrode seal ring;

700. 800, explosion-proof valve patch;

20. Core pack, 201, positive electrode lug, 202, negative electrode lug, 30, shell, 40, top cover patch, 50, insulating film, 60, bottom support sheet, 70, protective film, 80, sealing nail, 90, sealing patch.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In the following description, the structure of the top cover module 10 of the present utility model is specifically and specifically analyzed by taking two pole holes on the top cover sheet 100, two pole assemblies, two rivet members and two pole pads as examples, and the other structural forms are briefly described.

Embodiment one:

For convenience of description, hereinafter, two post holes are referred to as a positive post hole 101 and a negative post hole 102, respectively, two post assemblies are referred to as a positive post assembly 210 and a negative post assembly 220, two rivets are referred to as a positive rivet 310 and a negative rivet 320, respectively, and two post pads are referred to as a positive post pad 410 and a negative post pad 420, respectively.

The utility model discloses a top cover module 10, referring to fig. 1-3, the top cover module 10 comprises a top cover sheet 100, a positive pole assembly 210, a negative pole assembly 220, a positive pole riveting member 310, a negative pole riveting member 320, a positive pole pad 410, a negative pole pad 420 and an insulating member 500. The top cover sheet 100 is provided with a positive pole hole 101 and a negative pole hole 102, the top cover sheet 100 is also provided with an explosion-proof valve mounting hole 105, the explosion-proof valve mounting hole 105 is provided with an explosion-proof valve 700, and the top cover sheet 100 is attached with an explosion-proof valve patch 800 covering the explosion-proof valve 700. The positive electrode column assembly 210 (negative electrode column assembly 220) comprises a positive electrode column body 211 (negative electrode column body 221) and a positive electrode welding member 212 (negative electrode welding member 222), wherein the positive electrode welding member 212 (negative electrode welding member 222) is welded at one end of the positive electrode column body 211 (negative electrode column body 221), the positive electrode column body 211 (negative electrode column body 221) is penetrated through the positive electrode column hole 101 (negative electrode column hole 102), the positive electrode welding member 212 (negative electrode welding member 222) is used for being connected with the positive electrode tab 201 (negative electrode tab 202) of the core pack 20, the positive electrode welding member 212 (negative electrode welding member 222) and the positive electrode welding region 2121 (negative electrode welding region 2221) of the core pack 20 are at least two, the positive electrode riveting member 310 (negative electrode riveting member 320) is connected to the other end of the positive electrode column body 211 (negative electrode column body 221), the positive electrode riveting member 310 (negative electrode riveting member 320) and the positive electrode welding member 212 (negative electrode welding member 222) are respectively positioned at two sides of the top cover plate 100, the positive electrode pad 410 (negative electrode pad 420) is clamped between the positive electrode riveting member 310 (negative electrode riveting member 320) and the top cover plate 100, and the positive electrode welding member 222 is arranged between the top cover plate 100 and the top cover plate 100, and the positive electrode welding member 222 is welded between the top cover plate 100 and the top cover plate welding member (top cover plate 100.

It can be appreciated that, since the number of the positive electrode welding member 212 (the negative electrode welding member 222) and the positive electrode welding region 2121 (the negative electrode welding region 2221) of the core pack 20 is at least two, compared with the prior art in which only one tab connecting sheet and the core pack are welded, the positive electrode welding member 212 (the negative electrode welding member 222) and the positive electrode tab 201 (the negative electrode tab 202) of the core pack 20 have at least two positive electrode welding regions 2121 (the negative electrode welding region 2221), thereby improving the overcurrent capacity of the whole top cover module 10. And if the same overcurrent capability as the prior art is to be achieved, the size of the positive electrode welding member 212 (the negative electrode welding member 222) of the present embodiment can be smaller than the tab connection piece in the prior art, thereby being beneficial to reducing the manufacturing cost of the top cover module 10. Meanwhile, in the actual assembly process, the positive electrode post body 211 (the negative electrode post body 221) and the positive electrode welding piece 212 (the negative electrode welding piece 222) are connected to form the whole positive electrode post assembly 210 (the negative electrode post assembly 220), on one hand, compared with the prior art that the integrated forming of the post portion and the positive electrode welding portion 2113 is realized by adopting a machining mode, the positive electrode post assembly 210 (the negative electrode post assembly 220) of the embodiment can be manufactured by adopting fewer raw materials, and the manufacturing cost of the positive electrode post assembly 210 (the negative electrode post assembly 220) is reduced. On the other hand, the positive electrode welding member 212 (negative electrode welding member 222) which is a part of the positive electrode post assembly 210 (negative electrode post assembly 220) is directly welded with the positive electrode tab 201 (negative electrode tab 202) of the core pack 20, so that a tab connecting sheet in the prior art is not required, the thickness of the top cover module 10 is reduced, and the energy density of the battery is improved.

Referring to fig. 3, the positive electrode welding member 212 (the negative electrode welding member 222) is connected to two core bags 20 at the same time, and one positive electrode welding member 212 (the negative electrode welding member 222) is welded to two positive electrode tabs 201 (the negative electrode tabs 202) of the two core bags 20, respectively, that is, one positive electrode welding member 212 (the negative electrode welding member 222) has four positive electrode welding regions 2121 (the negative electrode welding regions 2221), and the two positive electrode welding regions 2121 (the negative electrode welding regions 2221) are in a group. Two positive electrode welding regions 2121 (negative electrode welding regions 2221) of the same group are located on both sides of the positive electrode connection region (negative electrode connection region) of the positive electrode column body 211 (negative electrode column body 221) and the positive electrode welding member 212 (negative electrode welding member 222). It can be understood that in this embodiment, the pole single-side overcurrent structure in the prior art is changed into a pole double-side overcurrent structure, so that the overcurrent capacity of the top cover module 10 of this embodiment is greatly improved, thereby being beneficial to improving the use satisfaction of users. The two positive electrode welding regions 2121 (negative electrode welding regions 2221) may be symmetrically disposed with respect to the positive electrode connection region (negative electrode connection region), or may be asymmetrically disposed, and the two positive electrode welding regions 2121 (negative electrode welding regions 2221) may be located on both left and right sides of the positive electrode connection region (negative electrode connection region), or may be located on only one side of the positive electrode connection region (negative electrode connection region), as shown in fig. 3.

It should be noted that, in an alternative embodiment of the present utility model, the number of the positive electrode welding regions 2121 (the negative electrode welding regions 2221) may be three, in which two positive electrode welding regions 2121 (the negative electrode welding regions 2221) are located on the left and right sides of the positive electrode connection region (the negative electrode connection region), and the remaining one is located above or below the positive electrode welding region 2121 (the negative electrode welding regions 2221). The number and distribution of the two positive electrode welding areas 2121 (negative electrode welding areas 2221) may be selected according to the actual overcurrent capacity of the header module 10.

It should be noted that, in the actual welding process, the welding form of the positive electrode welding member 212 (the negative electrode welding member 222) and the positive electrode tab 201 (the negative electrode tab 202) of the core pack 20 varies according to the number of the core packs 20, and if one cap module 10 is disposed corresponding to one core pack 20 in the actual assembly process, one positive electrode welding member 212 (the negative electrode welding member 222) is welded with only one positive electrode tab 201 (the negative electrode tab 202), and at least two positive electrode welding regions 2121 (the negative electrode welding regions 2221) are required for one positive electrode welding member 212 (the negative electrode welding member 222). When one cap module 10 is disposed corresponding to two core bags 20, one positive electrode welding member 212 (negative electrode welding member 222) needs to be welded to two positive electrode tabs 201 (negative electrode tabs 202) at the same time, at least four positive electrode welding regions 2121 (negative electrode welding regions 2221) are needed for one positive electrode welding member 212 (negative electrode welding member 222), and at least two positive electrode welding regions 2121 (negative electrode welding regions 2221) are needed for one positive electrode tab 201 (negative electrode tabs 202).

Alternatively, referring to fig. 4 to 5, the insulating member 500 is provided with a positive positioning protrusion 580 (negative positioning protrusion 590), and the top cover sheet 100 is provided with a positive positioning groove (negative positioning groove). The positive electrode positioning protrusion 580 (negative electrode positioning protrusion 590) is engaged with the positive electrode positioning groove (negative electrode positioning groove). Therefore, the positioning of the top cover sheet 100 and the insulating member 500 can be facilitated, and the shaking phenomenon of the insulating member 500 relative to the top cover sheet 100 can be avoided. Of course, in other embodiments, positive locating tabs 580 (negative locating tabs 590) may be provided on the top cover sheet 100 and positive locating slots (negative locating slots) provided on the insulator 500.

Referring to fig. 4 to 7, the positive electrode welding member 212 (negative electrode welding member 222) has a positive electrode post assembly hole 2122 (negative electrode post assembly hole 2222) penetrating therethrough, and one end of the positive electrode post body 211 (negative electrode post body 221) is inserted into the positive electrode post assembly hole 2122 (negative electrode post assembly hole 2222) to be disposed, and the assembly edges of the positive electrode post body 211 (negative electrode post body 221) and the positive electrode post assembly hole 2122 (negative electrode post assembly hole 2222) are welded to each other. It can be appreciated that, in the actual assembly process, only one end of the positive electrode post body 211 (the negative electrode post body 221) needs to be inserted into the positive electrode post assembly hole 2122 (the negative electrode post assembly hole 2222) to be arranged, and then the assembly edges of the positive electrode post body 211 (the negative electrode post body 221) and the positive electrode post assembly hole 2122 (the negative electrode post assembly hole 2222) are welded on the bottom wall of the positive electrode welding member 212 (the negative electrode welding member 222), so that the positive electrode post body 211 (the negative electrode post body 221) can be welded on the positive electrode welding member 212 (the negative electrode welding member 222), the connection is very convenient, the connection mode is firm, and the structural stability of the whole positive electrode post assembly 210 (the negative electrode post assembly 220) is ensured.

Further, as shown in fig. 10 to 11, the positive electrode welding member 212 (negative electrode welding member 222) is provided with a positive electrode welding groove 2123 (negative electrode welding groove 2223) surrounding the positive electrode column fitting hole 2122 (negative electrode column fitting hole 2222), and as shown in fig. 8 to 9, the positive electrode column body 211 (negative electrode column body 221) is provided with a positive electrode welding boss 2111 (negative electrode welding boss 22121) provided corresponding to the positive electrode welding groove 2123 (negative electrode welding groove 2223), and a weld is formed between an outer side wall of the positive electrode welding boss 2111 (negative electrode welding boss 22121) and an inner side wall of the positive electrode welding groove 2123 (negative electrode welding groove 2223). It will be appreciated that during the actual welding process, the positive electrode post body 211 (the negative electrode post body 221) is first inserted into the positive electrode post assembly hole 2122 (the negative electrode post assembly hole 2222) so that the positive electrode welding boss 2111 (the negative electrode welding boss 22121) extends into the positive electrode welding groove 2123 (the negative electrode welding groove 2223), and the bottom wall of the positive electrode welding boss 2111 (the negative electrode welding boss 22121) is flush with the bottom wall of the positive electrode welding member 212 (the negative electrode welding member 222), so that a gap is formed between the outer side wall of the positive electrode welding boss 2111 (the negative electrode welding boss 22121) and the inner side wall of the positive electrode welding groove 2123 (the negative electrode welding groove 2223), and the welding seam can be formed only by filling solder into the gap during the welding process. That is, by providing the positive electrode welding boss 2111 (the negative electrode welding boss 22121) and the positive electrode welding groove 2123 (the negative electrode welding groove 2223), not only the pre-positioning in the welding process can be realized, but also the formation of the weld can be facilitated, the projection of the weld formed after the welding of the positive electrode welding member 212 (the negative electrode welding member 222) and the positive electrode column body 211 (the negative electrode column body 221) is avoided from the positive electrode welding member 212 (the negative electrode welding member 222) is arranged, that is, the aesthetic degree is improved, and the adverse effect of the projection of the weld generated when the positive electrode welding member 212 (the negative electrode welding member 222) and the positive electrode tab 201 (the negative electrode tab 202) of the core pack 20 are connected can be avoided. The welding method may be laser welding or other welding processes, and the welding method is not particularly limited here.

As shown in fig. 8, the positive electrode post body 211 includes a positive electrode caulking portion 2112 and a positive electrode welding portion 2113 integrally formed, a positive electrode caulking groove 21121 is formed in the positive electrode caulking portion 2112, and as shown in fig. 12, the positive electrode caulking 310 has a positive electrode insertion portion into which the positive electrode caulking groove 21121 is inserted. It will be appreciated that in the actual connection process, the positive electrode rivet 310 is first sleeved onto the positive electrode rivet portion 2112 and is stopped against the bottom wall of the positive electrode rivet groove 21121, and then the positive electrode rivet 310 is swaged such that a portion of the positive electrode rivet 310 is inserted into the positive electrode rivet groove 21121 to form a positive electrode insertion portion. This can improve the connection stability between the positive electrode post body 211 and the positive electrode rivet 310. Optionally, the material of the positive electrode post body 211 is aluminum, and the material of the positive electrode rivet 310 is aluminum.

Referring to fig. 9, the negative electrode stem body 221 includes a negative electrode rivet portion 2211 and a negative electrode welding portion 2212, which are integrally formed, the negative electrode rivet portion 2211 is connected to the negative electrode rivet 320 and is the same as the negative electrode rivet 320, and the negative electrode welding portion 2212 is connected to the negative electrode welding 222 and is the same as the negative electrode welding 222. It can be appreciated that the negative electrode riveting portion 2211 is connected with the negative electrode riveting member 320, and is the same as the negative electrode riveting member 320 in material, so that the riveting connection between the negative electrode column body 221 and the negative electrode riveting member 320 can be conveniently realized, the negative electrode welding portion 2212 is connected with the negative electrode welding member 222, and the welding connection between the negative electrode column body 221 and the negative electrode can be conveniently realized by the same material as the welding member.

Optionally, the materials of the cathode riveting portion 2211 and the cathode riveting member 320 are all aluminum, the materials of the cathode welding portion 2212 and the cathode welding member 222 are copper, the processing technology of the cathode column body 221 is that copper plate aluminum bars in the prior art are processed by friction welding and then machining, and the processing technology is simplified to that copper aluminum composite materials are processed through a stamping technology, and the raw materials can be plates or coiled materials.

Alternatively, as shown with reference to fig. 9, the negative electrode caulking portion 2211 has a negative electrode caulking groove 22111, and as shown with reference to fig. 13, the negative electrode caulking member 320 has a negative electrode insertion portion that is inserted into the negative electrode caulking groove 22111. It can be appreciated that in the actual connection process, the negative electrode rivet 320 is first sleeved on the negative electrode rivet portion 2211 and is stopped on the bottom wall of the negative electrode rivet groove 22111, and then the negative electrode rivet 320 is riveted so that a portion of the negative electrode rivet 320 is embedded in the negative electrode rivet groove 22111 to form a negative electrode embedded portion. Thereby, the connection stability of the negative electrode stem body 221 and the negative electrode rivet 320 can be improved.

Alternatively, the negative electrode post body 221 includes a negative electrode rivet portion 2211 and a negative electrode welding portion 2212 that are integrally formed, the negative electrode rivet portion 2211 is connected to the negative electrode rivet 320 and is made of aluminum, and the negative electrode welding portion 2212 is connected to the negative electrode welding member 222 and is made of copper. The insulating member 500 has a supporting portion 510 at a side facing away from the top cover 100, and the negative electrode welding portion 2212 is provided with a supporting step 22122 corresponding to the supporting portion 510, and the supporting step 22122 and the supporting portion 510 are both abutted against the negative electrode welding member 222. It will be appreciated that during the welding process, the negative electrode welding member 222 can be stopped against the supporting step 22122 and the supporting portion 510, and the supporting step 22122 and the supporting portion 510 can both perform a laser welding supporting function on the negative electrode welding member 222, so that it can be ensured that the negative electrode welding member 222 is not deformed during the welding process of the negative electrode welding member 222 and the negative electrode tab 202 of the core pack 20. Further alternatively, the supporting portion 510 includes an annular flange 511, the edge range of the annular flange 511 is similar to the edge range of the cathode welding member 222, the difference between the sizes is not more than 1mm, and a plurality of supporting ribs 512 are further disposed in the annular flange 511, so that the welding sheet is ensured to be free from deformation when the laser welding is pressed.

Optionally, the material of the positive electrode welding member 212 is aluminum, the material of the negative electrode welding member 222 is copper, and the thickness of the positive electrode welding member 212 is thicker than that of the negative electrode welding member 222, and the specific thickness is required to be confirmed according to the overcurrent requirements of the positive electrode welding member 212 and the negative electrode welding member 222, wherein the minimum difference of the thickness is 0.2mm.

Referring to fig. 2, 4 and 5, the top cover module 10 further includes a positive electrode seal 610 (negative electrode seal 620), wherein the positive electrode seal 610 (negative electrode seal 620) is sleeved on the positive electrode post body 211 (negative electrode post body 221), a portion of the positive electrode seal 610 (negative electrode seal 620) is compressed between an outer peripheral wall of the positive electrode post body 211 (negative electrode post body 221) and an inner peripheral wall of the positive electrode post hole 101 (negative electrode post hole 102), and another portion is compressed between the positive electrode post body 211 (negative electrode post body 221) and a surface of the top cover sheet 100 facing the positive electrode welding member 212 (negative electrode welding member 222). It can be appreciated that the additional positive electrode sealing member 610 and the additional negative electrode sealing member 620 can ensure the connection tightness of the connection position of the top cover module 10 and the positive electrode column assembly 210 (the negative electrode column assembly 220), and ensure that the inner space of the case 30 is isolated from the outside when the top cover module 10 is mounted on the case 30 of the battery, thereby improving the tightness of the top cover module 10.

Alternatively, referring to fig. 4 to 5, the positive electrode seal member 610 (seal member) includes a first positive electrode seal ring 611 (first negative electrode seal ring 621) and a second positive electrode seal ring 612 (second negative electrode seal ring 622), the first positive electrode seal ring 611 (first negative electrode seal ring 621) is pressed between the outer peripheral wall of the positive electrode post body 211 (negative electrode post body 221) and the inner peripheral wall of the positive electrode post hole 101 (negative electrode post hole 102), and the second positive electrode seal ring 612 (second negative electrode seal ring 622) is pressed between the positive electrode post body 211 (negative electrode post body 221) and the surface of the cap sheet 100 facing the positive electrode weld 212 (negative electrode weld 222).

Further alternatively, referring to fig. 8, the positive electrode post body 211 includes an integrally formed positive electrode caulking portion 2112 and positive electrode welding portion 2113, the size of the positive electrode welding portion 2113 is larger than the size of the positive electrode caulking portion 2112, the positive electrode seal 610 is fitted over the positive electrode caulking portion 2112, the bottom wall of the second positive electrode seal ring 612 abuts against the positive electrode caulking portion 2112, and the second positive electrode seal ring 612 is pressed between the positive electrode caulking portion 2112 and the top cover sheet 100. This can further enhance the sealing action of the positive electrode seal 610. It should be noted that, in an alternative embodiment, when the size of the positive electrode seal 610 is relatively large and the outer diameter of the second positive electrode seal ring 612 is larger than the diameter of the positive electrode welding portion 2113, the second positive electrode seal ring 612 is compressed between the positive electrode caulking portion 2112, the positive electrode welding member 212 and the top cover sheet 100 according to the sealing requirement.

Further alternatively, referring to fig. 9, the negative electrode stem body 221 includes a negative electrode caulking portion 2211 and a negative electrode welding portion 2212 integrally formed, the size of the negative electrode welding portion 2212 is larger than that of the negative electrode caulking portion 2211, the negative electrode sealing member 620 is sleeved on the negative electrode caulking portion 2211, and the bottom wall of the second negative electrode sealing ring 622 abuts against the negative electrode welding portion 2212 and is clamped between the negative electrode welding portion 2212 and the top cover sheet 100. Thereby, the sealing action of the anode seal 620 can be further improved. It should be noted that, in an alternative embodiment, when the size of the anode seal 620 is relatively large and the outer diameter of the second anode seal ring 622 is larger than the diameter of the anode weld 2212, the second anode seal ring 622 is compressed between the anode weld 2212, the anode weld 222 and the cap piece 100, as required for sealing.

Alternatively, as shown with reference to fig. 12 and 13, a first positive electrode exhaust passage (first negative electrode exhaust passage) communicating with the positive electrode post hole 101 (negative electrode post hole 102) is formed between the positive electrode caulking 310 (negative electrode caulking 320) and the positive electrode post pad 410 (negative electrode post pad 420). It will be appreciated that an important component in the cap module 10 to ensure its tightness is the positive electrode seal 610 (negative electrode seal 620), and helium gas detection is required for the cap module 10 after the cap module 10 is assembled, but if the positive electrode rivet 310 (negative electrode rivet 320) and the positive electrode post pad 410 (negative electrode post pad 420) achieve sealing of the positive electrode post hole 101 (negative electrode post hole 102), the cap module 10 can also be detected by helium gas even if the positive electrode seal 610 (negative electrode seal 620) is not assembled or the positive electrode seal 610 (negative electrode seal 620) has a sealing problem. In this embodiment, the added first positive exhaust channel (first negative exhaust channel) makes the positive rivet 310 (negative rivet 320) and the positive post pad 410 (negative post pad 420) unable to perform a sealing function, so as to realize effective detection of the positive seal 610 (negative seal 620).

Further alternatively, referring to fig. 12 to 13, the positive electrode tab 410 (negative electrode tab 420) has a first positive electrode mounting groove 411 (first negative electrode mounting groove 421), the positive electrode rivet 310 (negative electrode rivet 320) has a positive electrode abutment 311 (negative electrode abutment 321) and a positive electrode tab 312 (negative electrode tab 322) connected, the positive electrode abutment 311 (negative electrode abutment 321) is mounted to the first positive electrode mounting groove 411 (first negative electrode mounting groove 421), the positive electrode tab 312 (negative electrode tab 322) abuts Yu Zhengji tab 410 (negative electrode tab 420) to provide an inner surface of the first positive electrode mounting groove 411 (first negative electrode mounting groove 421), and it is understood that during the actual mounting process, the positive electrode abutment 311 (negative electrode abutment 321) is mounted to the first positive electrode mounting groove 411 (first negative electrode mounting groove 421), and the positive electrode tab 312 (negative electrode tab 322) abuts Yu Zhengji tab 410 (negative electrode tab 420) to provide the first positive electrode tab 420 (positive electrode tab 420) to support the first positive electrode tab 410 (negative electrode tab 420) and enable the positive electrode tab 320 to be stably riveted to the positive electrode tab 410 (negative electrode tab 410).

Still further alternatively, referring to fig. 4 to 5 and 12 to 13, the first positive electrode exhaust passage (first negative electrode exhaust passage) includes a first positive electrode sub-passage 3111 (first negative electrode sub-passage 3211) formed at the bottom of the positive electrode convex ring portion 312 (negative electrode convex ring portion 322) and a second positive electrode sub-passage 412 (second negative electrode sub-passage 422) formed at the side wall of the first positive electrode mounting slot 411 (first negative electrode mounting slot 421). Thus, the positive electrode post hole 101 (the negative electrode post hole 102) can be communicated with the outside through the first positive electrode sub-channel 3111 (the first negative electrode sub-channel 3211) and/or the second positive electrode sub-channel 412 (the second negative electrode sub-channel 422), so that the positive electrode rivet 310 (the negative electrode rivet 320) and the positive electrode post pad 410 (the negative electrode post pad 420) cannot perform a sealing function, and thus effective detection of the positive electrode seal 610 (the negative electrode seal 620) is realized. The first positive electrode sub-channel 3111 (first negative electrode sub-channel 3211) has a depth of 0.2mm to 1mm, the first positive electrode exhaust channel has a width of 0.5mm to 5mm, preferably a depth of 0.2mm, preferably a width of 2mm, the second positive electrode sub-channel 412 (second negative electrode sub-channel 422) has a depth of 0.2mm to 1mm, and the first positive electrode exhaust channel has a width of 0.5mm to 5mm, preferably a depth of 0.2mm, preferably a width of 2mm.

Of course, it should be noted that the first positive exhaust channel (first negative exhaust channel) may be formed in other manners, for example, in an alternative embodiment, the upper surface of the positive electrode pillar pad 410 (negative electrode pillar pad 420) is a plane, and the positive electrode rivet 310 (negative electrode rivet 320) directly abuts against the Yu Zhengji pillar pad 410. The first positive electrode exhaust passage (first negative electrode exhaust passage) is formed on the abutment surfaces of the positive electrode stem pad 410 (negative electrode stem pad 420) and the positive electrode rivet 310 (negative electrode rivet 320), may be formed only on the upper surface of the positive electrode stem pad 410 (negative electrode stem pad 420), may be formed only on the lower surface of the positive electrode rivet 310 (negative electrode rivet 320), and may be formed on the upper surface of the positive electrode stem pad 410 (negative electrode stem pad 420) and the lower surface of the positive electrode rivet 310 (negative electrode rivet 320).

Alternatively, as shown with reference to fig. 14, a second positive electrode exhaust passage 540 (second negative electrode exhaust passage 550) communicating with the positive electrode post hole 101 (negative electrode post hole 102) is formed between the insulator 500 and the top cover sheet 100. An important component in the cap module 10 to ensure its sealability is the positive electrode seal 610 (negative electrode seal 620), which requires helium gas detection of the cap module 10 after the cap module 10 is assembled, but if the insulator 500 achieves sealing of the positive electrode post hole 101 (negative electrode post hole 102), the cap module 10 can also detect helium gas even if the positive electrode seal 610 (negative electrode seal 620) is not assembled or the positive electrode seal 610 (negative electrode seal 620) has a sealing problem. In this embodiment, the added second exhaust channel makes the insulating member 500 unable to perform a sealing function, so as to realize effective detection of the positive electrode sealing member 610. Further alternatively, referring to fig. 14, a positive electrode perforation 520 (negative electrode perforation 530) is formed on the insulating portion, and a second positive electrode exhaust passage 540 (second negative electrode exhaust passage 550) communicates with the positive electrode perforation 520 (negative electrode perforation 530). Of course, it should be noted here that the second positive electrode exhaust passage 540 (second negative electrode exhaust passage 550) may be formed in other manners. For example, a second positive electrode exhaust passage 540 (second negative electrode exhaust passage 550) is formed on a side wall of the cap sheet 100 facing the insulator 500 and communicates with the positive electrode post hole 101 (negative electrode post hole 102), and for example, a second positive electrode exhaust passage 540 (second negative electrode exhaust passage 550) is formed on both the cap sheet 100 and the insulator 500.

Referring to fig. 6 to 7, the positive electrode tab pad 410 (negative electrode tab pad 420) has a positive electrode insulating collar 413 (negative electrode insulating collar 423) protruding into the positive electrode tab hole 101 (negative electrode tab hole 102), and the positive electrode insulating collar 413 (negative electrode insulating collar 423) is pressed between the outer side wall of the positive electrode tab body 211 (negative electrode tab body 221) and the inner side wall of the positive electrode tab hole 101 (negative electrode tab hole 102). It can be understood that the positive insulating collar 413 (the negative insulating collar 423) can prevent the micro-short phenomenon caused by the overlapping of the burr left by the stamping process and the positive post body 211 (the negative post body 221) at the position of the positive post hole 101 (the negative post hole 102) on the top cover sheet 100, thereby ensuring the insulating properties of the top cover sheet 100 and the positive post body 211 (the negative post body 221).

Alternatively, the negative electrode pad 420 is made of an insulating material, and the positive electrode pad 410 may be made of an insulating material or a weak conductive material. Specifically, when the positive electrode pad 410 and the negative electrode pad 420 are both made of insulating materials, it means that the positive electrode pad 410 and the negative electrode pad 420 can be interchanged, and foolproof design is not required. When the negative electrode post pad 420 is made of an insulating material and the positive electrode post pad 410 is made of a weak conductive material (the weak conductive material can make the position of the positive electrode post pad 410 have a higher potential and reduce the corrosion speed of the positive electrode rivet 310), foolproof distinction design needs to be performed on the positive electrode post pad 410 and the negative electrode post pad 420, and the foolproof distinction design can design the positive electrode post pad 410 and the negative electrode post pad 420 into different colors and can also distinguish by setting foolproof parts.

Further alternatively, as shown with reference to fig. 4 and 5, the positive electrode fool-proofing portion (negative electrode fool-proofing portion) includes a positive electrode fool-proofing protrusion (negative electrode fool-proofing protrusion) and a positive electrode fool-proofing groove 1031 (negative electrode fool-proofing groove 1041) which are mutually matched. In the present embodiment, as shown in fig. 4 and 9, a second positive electrode mounting groove 103 (second negative electrode mounting groove 104) is provided on the top cover sheet 100 around the positive electrode post hole 101 (negative electrode post hole 102), a positive electrode fool-proof groove 1031 (negative electrode fool-proof groove 1041) is provided on the bottom wall of the second positive electrode mounting groove 103 (second negative electrode mounting groove 104), and a positive electrode fool-proof protrusion (negative electrode fool-proof protrusion) is provided on the bottom walls of the positive electrode post pad 410 and the negative electrode post pad 420. The positive electrode fool-proof grooves 1031 (negative electrode fool-proof grooves 1041) are two, the two positive electrode fool-proof grooves 1031 are located at two diagonal positions (upper left corner and lower right corner) of the second positive electrode mounting groove 103, and the two negative electrode fool-proof grooves 1041 are located at two diagonal positions (upper right corner and lower left corner) of the second positive electrode mounting groove 103.

It should be noted that, the positions of the positive electrode fool-proof protrusion (negative electrode fool-proof protrusion) and the positive electrode fool-proof groove 1031 (negative electrode fool-proof groove 1041) may be selected according to actual needs, for example, the positive electrode fool-proof groove 1031 (negative electrode fool-proof groove 1041) is provided on the side wall of the second positive electrode mounting groove 103 (second negative electrode mounting groove 104), the positive electrode fool-proof protrusion (negative electrode fool-proof protrusion) is provided on the side wall of the positive electrode post pad 410 and the negative electrode post pad 420, and for example, the positive electrode fool-proof protrusion (negative electrode fool-proof protrusion) is provided on the bottom wall of the second positive electrode mounting groove 103 (second negative electrode mounting groove 104), and the positive electrode fool-proof groove 1031 (negative electrode fool-proof groove 1041) is provided on the bottom wall of the positive electrode post pad 410 and the negative electrode post pad 420.

It should be noted that, besides the different setting positions of the positive electrode fool-proofing portion and the negative electrode fool-proofing portion, the positive electrode fool-proofing portion and the negative electrode fool-proofing portion with different shapes and numbers can be designed, so as to realize the distinction between the positive electrode post pad 410 and the negative electrode post pad 420, and of course, a plurality of distinction can be set to better distinguish, for example, at least two of the setting positions, the numbers and the shapes of the positive electrode fool-proofing portion and the negative electrode fool-proofing portion are different, or all are different. Of course, in practical design, the positive electrode fool-proofing portion and the negative electrode fool-proofing portion may be designed in other ways that are convenient for distinction, so as to realize distinction of the positive electrode pillar pad 410 and the negative electrode pillar pad 420.

In order to well distinguish the positive electrode post assembly 210 from the negative electrode post assembly 220 during the assembly process, the top cover module 10 is further provided with a foolproof structure for distinguishing the polarities of the positive electrode post assembly 210 and the negative electrode post assembly 220 mated with the electrode post hole. The specific structure of the fool-proof structure is described below.

According to the foregoing, the structures of the positive electrode tab body 211 and the negative electrode tab body 221 are not identical, the positive electrode rivet 310 and the negative electrode rivet 320 are identical and interchangeable, and the positive electrode tab pad 410 and the negative electrode tab pad 420 can be distinguished by the foolproof portions described above. Therefore, it is also necessary to provide fool-proofing structures for the positive electrode welding 212 and the negative electrode welding 222. Specifically, a fool-proof structure is required to be designed between the positive electrode welding member 212 (the negative electrode welding member 222) and the insulating member 500, and the fool-proof structure includes a positive electrode fool-proof flange 560 (a negative electrode fool-proof flange 570) disposed on the insulating member 500, and a positive electrode fool-proof surface 2124 (a negative electrode fool-proof surface 2224) that is stopped on the positive electrode fool-proof flange 560 (the negative electrode fool-proof flange 570) is disposed on the positive electrode welding member 212 (the negative electrode welding member 222). It should be noted that, the shapes of the positive fool-proof convex edge 560 and the negative fool-proof convex edge 570 are different, and the shapes of the positive fool-proof surface 2124 and the negative fool-proof surface 2224 are also different, so as to realize the distinction between the positive electrode welding member 212 and the negative electrode welding member 222.

Embodiment two:

The roof module 10 of the present embodiment is substantially the same as the roof module 10 of the first embodiment except that the number of the insulators 500 is two, and the positive insulator and the negative insulator are respectively provided, and the positive insulator and the negative insulator are respectively mounted on the other side of the roof sheet 100. The positive electrode insulator is provided with a positive electrode fool-proof convex edge 560 for fool prevention, and the negative electrode insulator is provided with a negative electrode fool-proof convex edge 570 for fool prevention.

Embodiment III:

The top cover module 10 of the present embodiment is substantially the same as the top cover module 10 of the first embodiment, except that only one pole hole is provided on the top cover module 10 of the present embodiment, and the relevant structure of the pole Kong Weizheng, one of the pole hole and the negative pole hole, and the positive pole hole (negative pole hole) are completely the same as those of the first embodiment. The top cover module 10 of the present embodiment is suitable for a battery with a positive electrode lead-out structure and a negative electrode lead-out structure respectively arranged at two ends.

Embodiment four:

Referring to fig. 15, the battery of the present embodiment includes a housing 30, two core packages 20 and a top cover module 10 of the first embodiment, the housing 30 has a mounting cavity, the mounting cavity has an open end, the two core packages 20 are bundled together and are disposed in the housing 30, the top cover module 10 is buckled at the open end of the mounting cavity, and a positive electrode welding member 212 and a negative electrode welding member 222 of the top cover module 10 are respectively connected with a positive electrode tab 201 and a negative electrode tab 202 at one end of the core package 20.

Optionally, the battery further includes a top cover patch 40, and the top cover patch 40 is provided with a positive electrode avoidance hole and a negative electrode avoidance hole which are respectively and correspondingly provided with the positive electrode post assembly 210 and the negative electrode post assembly 220. The additional top cover patch 40 can completely shield other parts of the top cover sheet 100 except for the positive electrode column assembly 210 and the negative electrode column assembly 220, so as to avoid the phenomenon of short circuit of the top cover sheet 100.

Optionally, the battery further includes an insulating film 50 and a bottom support sheet 60, the insulating film 50 is sleeved on the core pack 20, and the bottom support sheet 60 is installed inside the housing 30 and is sandwiched between the core pack 20 and the bottom wall of the housing 30. This can realize the insulating function between the battery and the case 30, and prevent the case 30 from being charged.

Optionally, the outer side of the case 30 is further covered with a protective film 70, thereby improving the protection of the battery.

Optionally, the battery further comprises a sealing nail 80, the sealing nail 80 is used for sealing the liquid injection hole 106 on the top cover sheet 100, the sealing nail 80 is further provided with a sealing patch 90, and the sealing patch 90 can promote sealing effect and protect the sealing nail 80.

Fifth embodiment:

The battery of this embodiment includes casing 30, core package 20 and top cap module 10 in the embodiment III, and casing 30 has the installation cavity, and the both ends of installation cavity open the setting, and core package 20 is established in casing 30, and two top cap modules 10 lock are in the both open ends of installation cavity, and the welding piece of two top cap modules 10 respectively with the anodal ear 201 and the negative pole ear 202 welded connection at core package 20 both ends.

If the housing 30 serves as the positive electrode or the negative electrode of the battery, one end of the mounting cavity may be opened, the other end may be closed, one end of the closed cavity serves as the positive electrode or the negative electrode, the open end is provided with the cap module 10 of the third embodiment, and the welding member of the cap module 10 is welded with the positive electrode tab 201 (or the negative electrode tab 202) of the core pack 20.

In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A roof module, comprising:

A top cover sheet provided with a pole hole;

The pole assembly comprises a pole body and welding pieces, wherein the welding pieces are welded at one end of the pole body, the pole body is arranged in the pole hole in a penetrating mode, the welding pieces are used for being connected with pole lugs of a core pack, and at least two welding areas of the welding pieces and the same pole lug of the core pack are arranged;

the riveting piece is connected to the other end of the pole body, and the riveting piece and the welding piece are respectively positioned at two sides of the top cover piece;

The pole pad is clamped between the riveting piece and the top cover sheet;

And the insulating piece is clamped between the welding piece and the top cover sheet so that the welding piece and the top cover sheet are arranged in an insulating manner.

2. The roof module of claim 1, wherein the welding member has a post assembly hole formed therethrough, one end of the post body is inserted into the post assembly hole, and the post body is welded to an assembly edge of the post assembly hole.

3. The top cover module according to claim 2, wherein the welding member is provided with a welding groove surrounding the pole assembly hole, the pole body is provided with a welding boss corresponding to the welding groove, and a welding seam is formed between an outer side wall of the welding boss and an inner side wall of the welding groove.

4. A cap module according to any one of claims 1-3, wherein at least two of said welding areas are located on either side of the connection area of said pole body and said weldment.

5. A cap module according to any one of claims 1-3, further comprising a seal member which is fitted around the pole body, one part of the seal member being compressed between the outer peripheral wall of the pole body and the inner peripheral wall of the pole bore, the other part being compressed between the pole body and/or the welding member and the surface of the cap sheet facing the welding member;

The riveting piece and the pole pad are provided with a first exhaust channel communicated with the pole hole, and/or the insulating piece and the top cover piece are provided with a second exhaust channel communicated with the pole hole.

6. The top cover module of any one of claims 1-3, wherein the pole pad has a first mounting groove, the rivet has a stop portion and a collar portion connected, the stop portion being mounted to the first mounting groove, the collar portion being stopped against a surface of the pole pad where the first mounting groove is provided, and/or:

The pole pad is provided with an insulation convex ring extending into the pole hole, and the insulation convex ring is pressed between the outer side wall of the pole body and the inner side wall of the pole hole.

7. A roof module according to any one of claims 1 to 3, wherein the roof sheet is provided with one of the post holes, the post body, the rivet and the welding member are one and are a positive post or a negative post constituting a battery, or:

The top cover plate is provided with two pole holes arranged at intervals, and the pole body, the riveting piece and the welding piece are two and respectively form a positive pole and a negative pole.

8. The top cover module according to claim 7, wherein the pole body of the negative pole comprises a negative pole riveting part and a negative pole welding part, the negative pole riveting part is connected with the riveting piece and is made of the same material as the riveting piece, the negative pole welding part is connected with the welding piece and is made of the same material as the welding piece, one side of the insulating piece, which faces away from the top cover piece, is provided with a supporting part, the negative pole welding part is provided with a supporting step corresponding to the supporting part, and the supporting step and the supporting part are both abutted against the welding piece.

9. The top cover module according to any one of claims 1-3, wherein the top cover sheet is provided with two pole holes arranged at intervals, the pole body, the riveting piece and the welding piece are all two, and the top cover module is further provided with a fool-proof structure for distinguishing the polarity of the pole body matched with the pole holes.

10. A battery, characterized by comprising a shell, a core pack and the top cover module according to any one of claims 1-9, wherein the shell is provided with a mounting cavity, the mounting cavity is provided with an open end, the core pack is arranged in the shell, the top cover module is buckled at the open end of the mounting cavity, and a welding piece of the top cover module is connected with a lug of the core pack.