Battery top cover assembly, single battery and power storage equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover assembly, a single battery and electricity storage equipment, the battery top cover assembly comprises a top cover piece and at least one electrode assembly, and the electrode assembly comprises a pole, a first insulating piece, a second insulating piece and at least two insulating heat conduction pieces; wherein; the pole comprises a first end and a second end, the first end abuts against the first insulating part, and the second end sequentially penetrates through the first insulating part, the top cover part and the second insulating part in a sealed mode and is connected with the second insulating part in a limiting mode; and at least one insulating heat conduction piece is connected between the first end and the top cover piece as well as between the second end and the top cover piece, so that heat of the pole is conducted to the top cover piece from the first end and the second end respectively. According to the battery top cover assembly, the heat on the pole can be conducted to the top cover piece, and the heat is transferred out through the shell and / or the top cover piece, so that the heat dissipation efficiency of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly, a single battery and an electricity storage device. Background Art

[0002] As battery performance continues to improve, battery applications are becoming more and more extensive. As battery energy density increases, the heat generated during the battery charge and discharge cycle also gradually increases. Therefore, the heat dissipation problem of the battery has also attracted much attention.

[0003] In the prior art, heat dissipation of the battery is generally achieved by fitting the outer shell (including the top cover sheet and the shell) with the cooling system to dissipate the heat inside the battery. A portion of the heat inside the battery will also be conducted to the pole through the conductive current collector in the pole piece. The pole needs to be welded to the external system circuit for conductivity. In order to prevent a short circuit, the pole is often insulated with insulating materials. Since the insulating material has poor thermal conductivity, it is impossible for it to conduct the heat on the pole to the outer shell and then exchange heat with the cooling system, thereby reducing the heat dissipation efficiency of the battery.

[0004] Therefore, there is an urgent need for a battery top cover assembly, a single battery and a power storage device to solve the above technical problems. Utility Model Content

[0005] One purpose of the utility model is to provide a battery top cover assembly, which can conduct the heat on the pole to the top cover member, and transfer it to the shell through the top cover member, and transfer the heat out through the shell and / or the top cover member to improve the heat dissipation efficiency of the battery.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery top cover assembly comprises a top cover member and at least one electrode assembly, wherein the electrode assembly comprises a pole, a first insulating member, a second insulating member and at least two insulating heat-conducting members; wherein;

[0008] The pole comprises a first end and a second end, the first end abuts against the first insulating member, the second end is sequentially sealed and penetrated through the first insulating member, the top cover member and the second insulating member, and is positionally connected with the second insulating member;

[0009] At least one insulating heat-conducting member is connected between the first end and the top cover member, and between the second end and the top cover member, so as to conduct the heat of the pole from the first end and the second end to the top cover member respectively.

[0010] Optionally, the first insulating member is provided with a first through hole, and the insulating heat-conducting member between the first end and the top cover member is filled in the first through hole; and / or,

[0011] The second insulating member is provided with a second through hole, and the insulating heat-conducting member between the second end and the top cover member is filled in the second through hole.

[0012] Optionally, the first insulating member is provided with a first limiting protrusion, which is arranged on the hole wall of the first through hole and extends from the hole wall of the first through hole toward the corresponding insulating heat-conducting member to limit the insulating heat-conducting member; and / or,

[0013] The second insulating member is provided with a second limiting protrusion, which is arranged on the hole wall of the second through hole and extends from the hole wall of the second through hole toward the corresponding insulating heat conductive member to limit the insulating heat conductive member.

[0014] Optionally, a first limiting step is extended from a side of the first insulating member away from the top cover member, and the first end is arranged in the first limiting step; and / or,

[0015] A second limiting step is extended from a side of the second insulating member away from the top cover member, and the second end is arranged in the second limiting step.

[0016] Optionally, a plurality of clamping members are further provided on the first limiting step, and the clamping members are clamped to the first end of the pole.

[0017] Optionally, the insulating heat-conducting component is an insulating heat-conducting adhesive.

[0018] Optionally, the pole comprises a connecting portion and a fixing portion, one end of the connecting portion is sequentially sealed and penetrated through the first insulating member, the top cover member and the second insulating member and is riveted to the second insulating member to form the fixing portion, and at least one insulating heat conductive member is connected between the fixing portion and the top cover member, and between the connecting portion and the top cover member; or,

[0019] The above-mentioned pole includes a main body and a fixed block. The above-mentioned main body is sealed and penetrated through the above-mentioned first insulating member, the above-mentioned top cover member, the above-mentioned second insulating member and the above-mentioned fixed block in sequence and is fixedly connected to the above-mentioned fixed block. At least one of the above-mentioned insulating heat-conducting members is connected between the above-mentioned fixed block and the above-mentioned top cover member, and between the above-mentioned main body and the above-mentioned top cover member.

[0020] Optionally, a heat-conducting seal is provided between the outer periphery of the pole and the top cover.

[0021] Another object of the utility model is to provide a single battery, which can conduct the heat on the pole to the top cover, and transfer it to the shell through the top cover, and transfer the heat out through the shell and / or the top cover to improve the heat dissipation efficiency of the battery.

[0022] To achieve this purpose, the utility model adopts the following technical solutions:

[0023] A single cell battery comprises a shell, a core pack and a battery top cover assembly as described in any of the above schemes, wherein the core pack is arranged in the shell, and the battery top cover assembly is sealed and connected to the opening of the shell to form an outer shell of the core pack.

[0024] Another object of the utility model is to provide an electric storage device, which can conduct the heat on the pole to the shell, and conduct all the heat of the single battery through the shell, thereby improving the heat dissipation efficiency of the battery.

[0025] To achieve this purpose, the utility model adopts the following technical solutions:

[0026] The power storage device comprises the above-mentioned single battery.

[0027] Beneficial effects of the utility model:

[0028] The utility model provides a battery top cover assembly, a single cell and an electric storage device. By connecting an insulating heat-conducting member between the first end of the pole and the top cover member, and between the second end of the pole and the top cover member, a heat-conducting connection between the first end and the second end of the pole and the top cover member can be achieved; that is, the heat of the pole can be transferred from the first end and the second end to the top cover member respectively through the insulating heat-conducting member. Since the top cover member is connected to a shell, the heat of the top cover member can be transferred to the shell, and heat is exchanged with an external cooling system through the shell and / or the top cover member to achieve rapid heat dissipation of the entire single cell, thereby improving the heat dissipation effect and heat dissipation efficiency of the single cell using the battery top cover assembly on the internal core package, especially the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an axonometric view of the battery top cover assembly provided in the first embodiment of the utility model;

[0030] Figure 2 It is an exploded view of the battery top cover assembly provided in the first embodiment of the utility model;

[0031] Figure 3 It is a top view of the battery top cover assembly provided in the first embodiment of the utility model;

[0032] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0033] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 6It is a bottom view of the battery top cover assembly provided in the first embodiment of the utility model;

[0035] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle;

[0036] Figure 8 It is an axonometric diagram of the pole and the second insulating member in some other embodiments provided in the first embodiment of the utility model.

[0037] In the figure:

[0038] 10. Top cover;

[0039] 20. Electrode assembly; 21. Electrode column; 211. Main body; 212. Fixing block; 213. Connecting part; 214. Fixing part; 22. First insulating member; 221. First through hole; 222. First limiting protrusion; 223. First limiting step; 224. Clamping member; 23. Second insulating member; 231. Second through hole; 232. Second limiting protrusion; 233. Second limiting step; 24. Insulating heat conductive member; 25. Sealing member;

[0040] 30. Explosion-proof valve; 40. Liquid injection structure. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] Embodiment 1

[0046] This embodiment provides a battery top cover assembly, which is arranged on the shell of a single battery to facilitate the conductivity and sealing performance of the single battery.

[0047] Please refer to Figures 1 to 5 Specifically, the battery top cover assembly includes a top cover member 10 and at least one electrode assembly 20, the electrode assembly 20 includes a pole 21, a first insulating member 22, a second insulating member 23 and at least two insulating heat-conducting members 24; wherein; the pole 21 includes a first end and a second end, the first end abuts against the first insulating member 22, and the second end is sealed and penetrated through the first insulating member 22, the top cover member 10 and the second insulating member 23 in sequence, and is limitedly connected to the second insulating member 23; at least one insulating heat-conducting member 24 is connected between the first end and the top cover member 10, and between the second end and the top cover member 10, so as to conduct the heat of the pole 21 from the first end and the second end to the top cover member 10 respectively.

[0048] The battery top cover assembly of the present embodiment can achieve thermal connection between the first end and the second end of the pole 21 and the top cover member 10 by connecting the insulating heat conductive member 24 between the first end of the pole 21 and the top cover member 10, and between the second end of the pole 21 and the top cover member 10; that is, the heat of the pole 21 can be transferred from the first end and the second end to the top cover member 10 respectively through the insulating heat conductive member 24. Since the top cover member 10 is connected to the shell, the heat of the top cover member 10 can be transferred to the shell, and heat is exchanged with the external cooling system through the shell and / or the top cover member 10 to achieve rapid heat dissipation of the entire single cell, thereby improving the heat dissipation effect and heat dissipation efficiency of the single cell using the battery top cover assembly for the internal core package, especially the pole 21.

[0049] Optionally, the insulating heat conductive member 24 is an insulating heat conductive adhesive, which not only has a heat conductive effect but also has insulating properties. It is a soft structure, which is convenient for placing the insulating heat conductive member 24 and can also ensure its contact area with the pole 21 and the top cover member 10 respectively, thereby improving the heat dissipation effect.

[0050] Please refer to Figure 2 In this embodiment, the first insulating member 22 is provided with a first through hole 221, and the insulating heat-conducting member 24 between the first end and the top cover member 10 is filled and arranged in the first through hole 221; and / or the second insulating member 23 is provided with a second through hole 231, and the insulating heat-conducting member 24 between the second end and the top cover member 10 is filled and arranged in the second through hole 231; to ensure the thermal connection between the pole 21 and the top cover member 10, and at the same time, the insulating heat-conducting member 24 is filled in the corresponding through hole, which can ensure the insulation between the pole 21 and the top cover member 10, avoid the short circuit of the pole 21 caused by the gap between the two, and improve the reliability of the battery top cover assembly.

[0051] Optionally, the thickness of the insulating heat conductive member 24 is not less than the depth of the first through hole 221, and the thickness of the insulating heat conductive member 24 is not less than the depth of the second through hole 231, so as to ensure that the two sides of the insulating heat conductive member 24 can be fully in contact with the pole 21 and the top cover member 10 respectively, thereby increasing the heat dissipation area.

[0052] In some embodiments, the first insulating member 22 is provided with a first limiting protrusion 222, which is arranged on the hole wall of the first through hole 221 and extends from the hole wall of the first through hole 221 toward the corresponding insulating heat conductive member 24 to limit the insulating heat conductive member 24; and / or the second insulating member 23 is provided with a second limiting protrusion 232, which is arranged on the hole wall of the second through hole 231 and extends from the hole wall of the second through hole 231 toward the corresponding insulating heat conductive member 24 to limit the insulating heat conductive member 24; that is, the circumferential direction of the insulating heat conductive member 24 at each position is limited to define its installation position, and at the same time, the pole 21 and the top cover member 10 are cooperated to realize all-round fixation of the insulating heat conductive member 24.

[0053] Please refer to Figure 2 , Figure 6 and Figure 7 In some embodiments, a first limiting step 223 is extended from the side of the first insulating member 22 away from the top cover member 10, and the first end is arranged in the first limiting step 223; and / or a second limiting step 233 is extended from the side of the second insulating member 23 away from the top cover member 10, and the second end is arranged in the second limiting step 233; such a configuration facilitates the installation and positioning of the pole 21, and at the same time can achieve insulation between the outer peripheral wall of the first end of the pole 21 and the top cover member 10, and achieve insulation between the outer peripheral wall of the second end of the pole 21 and the top cover member 10, thereby better avoiding the risk of short circuit of the pole 21 and improving the safety of the battery top cover assembly.

[0054] In order to improve the limiting and fixing effect of the pole 21, optionally, a plurality of clamping parts 224 are further provided on the first limiting step 223, and the clamping part 224 is clamped to the first end of the pole 21, that is, after the circumferential position of the pole 21 is limited by the first limiting step 223, the pole 21 can also be limited and fixed in the vertical direction by the clamping part 224 to ensure the installation of the pole 21, prevent the first end of the pole 21 from tilting, and avoid affecting the heat dissipation of the pole 21 and the internal connection of the single battery.

[0055] Please refer to Figure 5 and Figure 8 In some embodiments, the second insulating member 23 may be square or circular, both of which can achieve the insulating limit function for the pole 21. Correspondingly, the insulating heat-conducting member 24 disposed in the second through hole 231 of the second insulating member 23 also changes with the change of the second insulating member 23.

[0056] Please refer to Figure 2 and Figure 5In some embodiments, the pole 21 includes a body 211 and a fixing block 212. The body 211 is sequentially sealed and penetrated through the first insulating member 22, the top cover 10, the second insulating member 23 and the fixing block 212 and is fixedly connected to the fixing block 212. That is, the pole 21 is divided into a separate fixing block 212 and a body 211. After installation, the two are fixedly connected to achieve a fixed connection between the pole 21 and the top cover 10, the second insulating member 23, and the first insulating member 22. Optionally, in the above-mentioned pole 21, at least one insulating heat conductive member 24 is connected between the fixing block 212 and the top cover 10, and between the body 211 and the top cover 10, so that a heat conductive connection between the pole 21 and the top cover 10 can be achieved.

[0057] Please refer to Figure 8 In some other embodiments, the pole 21 includes a connecting portion 213 and a fixing portion 214, one end of the connecting portion 213 is sealed and penetrated through the first insulating member 22, the top cover 10, and the second insulating member 23 in sequence, and is riveted with the second insulating member 23 to form the fixing portion 214, that is, the pole 21 is an integral structure, and its upper end is riveted with the second insulating member 23 after passing through the above structure, so that the fixed connection between the pole 21 and the top cover 10, the second insulating member 23, and the first insulating member 22 can be achieved. Optionally, in the above-mentioned pole 21, at least one insulating heat conductive member 24 is connected between the fixing portion 214 and the top cover 10, and between the connecting portion 213 and the top cover 10, so that the thermal connection between the pole 21 and the top cover 10 can be achieved.

[0058] Specifically, the connecting portion 213 is sealed and penetrated in sequence through the first insulating member 22, the top cover member 10, the second through hole 231 and the insulating heat-conducting member 24 arranged in the second through hole 231, and is riveted with the second insulating member 23 to form a fixing portion 214, thereby realizing the functions of heat conduction, insulation and fixation between the pole 21 and the top cover member 10.

[0059] Please refer to Figure 2 and Figure 5 In some embodiments, a seal 25 is further provided on the periphery of the pole 21, and the seal 25 is abutted and compressed between the periphery of the pole 21 and the top cover 10, between the periphery of the pole 21 and the first insulating member 22, and / or between the periphery of the pole 21 and the second insulating member 23 to achieve sealing between the pole 21 and the top cover 10.

[0060] Exemplarily, the seal 25 is disposed between the outer periphery of the pole 21 and the top cover 10 and between the outer periphery of the pole 21 and the first insulating member 22, and the seal 25 is compressed against the insulating heat conductive member 24 located in the second insulating member 23, forming a comprehensive seal between the pole 21 and the top cover 10.

[0061] Please refer to Figure 1 In this embodiment, the battery top cover assembly further includes an explosion-proof valve 30, which is disposed on the top cover member 10 to achieve an explosion-proof pressure relief function inside the single battery on which the battery top cover assembly is installed.

[0062] In some embodiments, the battery top cover assembly further includes a liquid injection structure 40, which is disposed on the top cover 10 to realize the injection of electrolyte into the single cell on which the battery top cover assembly is installed. Specifically, the liquid injection structure 40 includes a liquid injection hole and a sealing nail, and the liquid injection hole is opened on the top cover 10 to facilitate liquid injection into the single cell. After the liquid injection is completed, the sealing nail can be installed to achieve the sealing of the liquid injection hole to ensure the sealing of the single cell.

[0063] This embodiment also provides a single cell, which includes a shell, a core pack, and a battery top cover assembly as described in any of the above schemes, wherein the core pack is arranged in the shell, and the battery top cover assembly is sealed and connected to the opening of the shell to form an outer shell of the core pack. Through the arrangement of the battery top cover assembly, the single cell can exchange all its own heat with the external cooling system to ensure the heat dissipation effect and heat dissipation efficiency of each position of the single cell.

[0064] This embodiment also provides a power storage device, which is a device such as a battery module, a battery pack, etc. that loads the single battery and stores electricity, and includes the above-mentioned single battery. The power storage device has any beneficial effect of the single battery described in any of the above schemes, and the battery top cover assembly, which will not be repeated here.

[0065] Embodiment 2

[0066] This embodiment provides a battery top cover assembly, a single battery and a power storage device. The difference between this embodiment and the first embodiment is that the function of the sealing member 25 is different.

[0067] To be specific, in this embodiment, a heat-conductive seal is provided between the outer periphery of the pole 21 and the top cover 10, that is, the seal 25 of the first embodiment is a heat-conductive seal. The heat-conductive seal can not only realize the insulation seal between the top cover 10 and the pole 21, but also conduct the heat of the pole 21 to the top cover 10, thereby accelerating the heat conduction and heat dissipation efficiency.

[0068] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery top cover assembly, characterized in that: It comprises a top cover (10) and at least one electrode assembly (20), wherein the electrode assembly (20) comprises a pole (21), a first insulating member (22), a second insulating member (23) and at least two insulating heat-conducting members (24); wherein; The pole (21) comprises a first end and a second end, the first end abuts against the first insulating member (22), and the second end is sequentially sealed and penetrated through the first insulating member (22), the top cover member (10) and the second insulating member (23), and is positionally connected to the second insulating member (23); At least one insulating heat-conducting member (24) is connected between the first end and the top cover member (10), and between the second end and the top cover member (10), so as to transfer the heat of the pole (21) from the first end and the second end to the top cover member (10), respectively.

2. The battery top cover assembly according to claim 1, characterized in that: The first insulating member (22) is provided with a first through hole (221), and the insulating heat-conducting member (24) between the first end and the top cover member (10) is filled in the first through hole (221); and / or, The second insulating member (23) is provided with a second through hole (231), and the insulating heat-conducting member (24) between the second end and the top cover member (10) is filled in the second through hole (231).

3. The battery top cover assembly according to claim 2, characterized in that: The first insulating member (22) is provided with a first limiting protrusion (222), the first limiting protrusion (222) being arranged on the hole wall of the first through hole (221) and extending from the hole wall of the first through hole (221) toward the corresponding insulating heat-conducting member (24) to limit the position of the insulating heat-conducting member (24); and / or, The second insulating member (23) is provided with a second limiting protrusion (232), which is arranged on the hole wall of the second through hole (231) and extends from the hole wall of the second through hole (231) toward the corresponding insulating heat-conducting member (24) to limit the insulating heat-conducting member (24).

4. The battery top cover assembly according to claim 1, characterized in that: A first limiting step (223) is extended from a side of the first insulating member (22) away from the top cover member (10), and the first end is arranged in the first limiting step (223); and / or, A second limiting step (233) is provided on a side of the second insulating member (23) that is away from the top cover member (10), and the second end is arranged in the second limiting step (233).

5. The battery top cover assembly according to claim 4, characterized in that: A plurality of clamping members (224) are also provided on the first limiting step (223), and the clamping members (224) are clamped to the first end of the pole (21).

6. The battery top cover assembly according to claim 1, characterized in that: The insulating heat-conducting member (24) is an insulating heat-conducting glue.

7. The battery top cover assembly according to claim 1, characterized in that: The pole (21) comprises a connecting portion (213) and a fixing portion (214); one end of the connecting portion (213) is sealed and penetrated through the first insulating member (22), the top cover member (10) and the second insulating member (23) in sequence and is riveted to the second insulating member (23) to form the fixing portion (214); at least one insulating heat-conducting member (24) is connected between the fixing portion (214) and the top cover member (10), and between the connecting portion (213) and the top cover member (10); or, The pole (21) comprises a main body (211) and a fixing block (212); the main body (211) is sealed and penetrated through the first insulating member (22), the top cover member (10), the second insulating member (23) and the fixing block (212) in sequence and is fixedly connected to the fixing block (212); at least one insulating heat-conducting member (24) is connected between the fixing block (212) and the top cover member (10), and between the main body (211) and the top cover member (10).

8. The battery top cover assembly according to any one of claims 1 to 7, characterized in that: A heat-conducting sealing member is provided between the outer periphery of the pole (21) and the top cover member (10).

9. A single cell, characterized in that: It comprises a shell, a core pack and a battery top cover assembly as described in any one of claims 1 to 8, wherein the core pack is arranged in the shell, and the battery top cover assembly is sealed and connected to the opening of the shell to form an outer shell of the core pack.

10. An electric storage device, characterized in that: Comprising the single cell as claimed in claim 9.

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