Battery cover, battery, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery cover, a battery, a battery pack and electric equipment, and relates to the technical field of batteries, the battery cover comprises a cover plate, an insulating space ring, a pole terminal and a sealing ring, and a first mounting hole is formed in the cover plate. The insulating space ring is provided with a second mounting hole and is connected to one end of the cover plate. The pole terminal is inserted into the first mounting hole and the second mounting hole, and a mounting gap is defined by the pole terminal, the cover plate and the insulating space ring. The pole terminal is provided with a first stop part, and the first stop part is located in the installation gap and is far away from the insulation space ring. The sealing ring comprises a sealing ring body and a flange, and the sealing ring body is sleeved on the pole terminal. One end of the sealing ring body abuts against the first stopping part, the other end of the sealing ring body abuts against the insulating space ring, the flange is located between the cover plate and the insulating space ring, and a circulation part is reserved between the sealing ring body and / or the flange and the insulating space ring. According to the battery cover provided by the embodiment of the invention, poor shell pressure can be avoided.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cover, battery, battery pack and electrical device. Background Technology

[0002] Batteries can provide power for electrical devices, such as the power batteries used in new energy vehicles.

[0003] A battery typically consists of a cell, a casing, and a cover. The casing has a cavity where the cell is housed, and the cover is placed on the casing for encapsulation. In related technologies, the cover has mounting holes into which the electrode core is inserted. One side of the electrode core is connected to one end of the cover via an insulating ring and a disc, while the other side is connected to the other end of the cover via a lead-out piece and an insulating spacer. A spacer sleeve and a sealing ring are fitted onto the portion of the electrode core corresponding to the spacer between the insulating ring and the insulating spacer to insulate or seal the electrode core from the insulating ring, disc, cover, and insulating spacer.

[0004] However, once the electrolyte flows from the casing into the mounting gap formed by the electrode core, insulating ring, disc, cover plate, and terminal, it is not easy for it to flow back. This accumulated electrolyte is prone to forming a secondary galvanic cell with the terminal and cover plate, resulting in poor casing pressure and thus affecting the use of the battery. Utility Model Content

[0005] Based on this, this application provides a battery cover, a battery, a battery pack, and an electrical device to solve the problem of poor casing pressure on the battery cover of existing batteries.

[0006] In a first aspect, this application provides a battery cover, including a cover plate, an insulating spacer, a terminal post and a sealing ring, wherein a first mounting hole is provided on the cover plate;

[0007] The insulating spacer has a second mounting hole, which is connected to one end of the cover plate, and the second mounting hole communicates with the first mounting hole.

[0008] The pole terminal is sequentially inserted into the first mounting hole and the second mounting hole, and forms a mounting gap with the cover plate and the insulating spacer; the pole terminal has a first stop portion, which is located in the mounting gap and away from the insulating spacer.

[0009] The sealing ring includes a sealing ring body and a flange connected to the periphery of the sealing ring body. The sealing ring body is sleeved on the pole terminal and located in the installation gap.

[0010] One end of the sealing ring body abuts against the first stop portion, and the other end of the sealing ring body abuts against the insulating spacer. The flange is located between the cover plate and the insulating spacer, and a flow portion is left between the sealing ring body and / or the flange and the insulating spacer.

[0011] In one possible implementation, the flange abuts against the insulating spacer.

[0012] In one possible implementation, the flange thickness is 0.5 mm to 1.2 mm.

[0013] In one possible implementation, the sealing ring body and the flange are integrally formed.

[0014] In one possible implementation, the sealing ring body and the pole terminal are interference-fitted.

[0015] In one possible implementation, the pole terminal includes a pole core, an insulating ring, and a disc. The pole core is sequentially inserted into a first mounting hole and a second mounting hole, and a second stop is provided on the side of the pole core away from the insulating spacer.

[0016] Both the insulating ring and the disc are fitted onto the pole core. One end of the insulating ring is connected to the second stop, and the other end of the insulating ring is connected to one end of the disc. The other end of the disc is connected to the other end of the cover plate.

[0017] The pole core, insulating ring, disc, cover plate and insulating spacer form an installation gap, the sealing ring body is sleeved on the pole core, and the first stop is located on the insulating ring at the end facing the insulating spacer.

[0018] In one possible implementation, a first recessed platform is provided on the cover plate, a first mounting hole is located on the first recessed platform, and one end of the disc facing away from the insulating ring is connected to the first recessed platform.

[0019] And / or, the insulating spacer is provided with a second recessed platform, the second mounting hole is located on the second recessed platform, and the end of the sealing ring body facing away from the insulating ring abuts against the second recessed platform.

[0020] In one possible implementation, a lead sheet is also included, which abuts against the end of the insulating spacer away from the cover plate, and the electrode core is electrically connected to the lead sheet;

[0021] And / or, it also includes a rupture disc and a protective disc, with a third mounting hole provided on the cover plate, the rupture disc being sealed at the third mounting hole, and the protective disc being connected to the periphery of the rupture disc and the cover plate.

[0022] Secondly, this application also provides a battery, including a battery cell, a housing, and any of the battery covers provided in the first aspect, wherein the battery cell is disposed inside the housing, and a cover plate in the battery cover is disposed on the housing.

[0023] Thirdly, this application also provides a battery pack, including a battery pack body and at least one battery provided in the second aspect disposed on the battery pack body.

[0024] Fourthly, this application also provides an electrical device, including a device body, on which the battery provided in the second aspect is disposed;

[0025] Alternatively, the device itself may be equipped with the battery pack provided in the third aspect.

[0026] The battery cover, battery, battery pack, and electrical device provided in this application include a cover plate, an insulating spacer, terminal posts, and a sealing ring. A first mounting hole is formed on the cover plate, and a second mounting hole is formed on the insulating spacer. The insulating spacer is connected to one end of the cover plate, and the second mounting hole communicates with the first mounting hole. Terminal posts are sequentially inserted into the first and second mounting holes, forming a mounting gap with the cover plate and the insulating spacer. A first stop is provided on the terminal post, positioning it within the mounting gap and away from the insulating spacer. The sealing ring includes a sealing ring body and a sealing ring connected to the sealing ring. The flange on the periphery of the main body fits the sealing ring body onto the terminal post and is located in the installation gap, so that one end of the sealing ring body abuts against the first stop and the other end of the sealing ring body abuts against the insulating spacer. This can isolate and insulate between the terminal post and the cover plate. The flange is located between the cover plate and the insulating spacer, which can reduce the risk of discharge between the terminal post and the cover plate. By leaving a flow part between the sealing ring body and / or the flange and the insulating spacer, the electrolyte in the installation gap can flow back into the casing through the flow part, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the battery cover provided in an embodiment of this application;

[0029] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along section AA in the middle;

[0030] Figure 3 for Figure 1 Exploded view in the middle;

[0031] Figure 4 for Figure 1 A schematic diagram of the main cross-section structure.

[0032] Figure label:

[0033] 100: Cover plate;

[0034] 110: First mounting hole;

[0035] 120: Installation gap;

[0036] 130: First sinking platform;

[0037] 140: Third mounting hole;

[0038] 200: Insulating spacer;

[0039] 210: Second mounting hole;

[0040] 220: Second sinkhole;

[0041] 300: pole terminal;

[0042] 301: First stop section;

[0043] 302: Second stop section;

[0044] 310: Core;

[0045] 320: Insulating ring;

[0046] 330: Disc;

[0047] 400: Sealing ring;

[0048] 410: Sealing ring body;

[0049] 420: Flange;

[0050] 500: Lead-out sheet;

[0051] 600: Fragmentation;

[0052] 700: Protective film. Detailed Implementation

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of this application as detailed in the appended claims.

[0054] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] As mentioned in the background section, a spacer and a sealing ring are fitted onto the portion of the electrode core corresponding to the spacer between the insulating ring and the insulating spacer. The spacer insulates the electrode core from the insulating ring, disc, cover plate, and insulating spacer. The sealing ring easily forms a one-way seal at the gap between the insulating spacer and the electrode core. This allows electrolyte inside the casing to easily flow into the installation gap formed by the electrode core, insulating ring, disc, cover plate, and terminal, rather than flowing back. This accumulated electrolyte can easily form a secondary galvanic cell with the terminal and cover plate, causing poor casing pressure and affecting the battery's performance requirements and lifespan. Furthermore, since the spacer and sealing ring are two separate components, assembling them onto the electrode core increases assembly difficulty and cost, and they are prone to being omitted. Such omissions are difficult to detect and pose a significant safety hazard.

[0056] To address the aforementioned problems in the prior art, this application provides a battery cover, a battery, a battery pack, and an electrical device. The battery cover provided by this application includes a cover plate, an insulating spacer, terminal posts, and a sealing ring. A first mounting hole is formed on the cover plate, and a second mounting hole is formed on the insulating spacer. The insulating spacer is connected to one end of the cover plate, and the second mounting hole communicates with the first mounting hole. Terminal posts are sequentially inserted into the first and second mounting holes, forming a mounting gap with the cover plate and the insulating spacer. A first stop is provided on the terminal post, positioning it within the mounting gap and away from the insulating spacer. The sealing ring includes a sealing ring body and a flange connected to the periphery of the sealing ring body. The sealing ring body is fitted onto the terminal post and positioned within the installation gap, with one end of the sealing ring body abutting against the first stop and the other end abutting against the insulating spacer. This provides insulation between the terminal post and the cover plate. The flange is located between the cover plate and the insulating spacer, reducing the risk of discharge between the terminal post and the cover plate. By leaving a flow passage between the sealing ring body and / or the flange and the insulating spacer, the electrolyte in the installation gap can flow back into the casing through the flow passage, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance.

[0057] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0058] Firstly, please refer to Figures 1-4 As shown, this application provides a battery cover, including a cover plate 100, an insulating spacer 200, a terminal post 300 and a sealing ring 400, and a first mounting hole 110 is provided on the cover plate 100.

[0059] The insulating spacer 200 has a second mounting hole 210. The insulating spacer 200 is connected to one end of the cover plate 100, and the second mounting hole 210 is connected to the first mounting hole 110.

[0060] The pole terminal 300 is sequentially inserted into the first mounting hole 110 and the second mounting hole 210, and forms a mounting gap 120 with the cover plate 100 and the insulating spacer 200. The pole terminal 300 has a first stop portion 301, which is located in the mounting gap 120 and away from the insulating spacer 200.

[0061] The sealing ring 400 includes a sealing ring body 410 and a flange 420 connected to the periphery of the sealing ring body 410. The sealing ring body 410 is sleeved on the pole terminal 300 and located in the installation gap 120.

[0062] One end of the sealing ring body 410 abuts against the first stop portion 301, and the other end of the sealing ring body 410 abuts against the insulating spacer 200. The flange 420 is located between the cover plate 100 and the insulating spacer 200, and a flow portion is left between the sealing ring body 410 and / or the flange 420 and the insulating spacer 200.

[0063] In this embodiment, the cover plate 100 is also referred to as the battery cover plate, top cover, etc. It can be a rectangular or cylindrical thin plate structure, specifically matching the shape of the mounting opening on the housing. The cover plate 100 is provided with a first mounting hole 110, which is used to communicate between the inside of the housing and the outside, and is used to install the terminal 300. It can be a round hole, a square hole, etc. The specific shape, size, position, etc. of the first mounting hole 110 can be determined according to actual needs.

[0064] In this embodiment, the insulating spacer 200 serves to isolate and insulate between the cover plate 100 and the lead-out point. It can be plate-shaped, sheet-shaped, or other structures. The insulating spacer 200 also has a second mounting hole 210, which is sized to match the first mounting hole 110, for mounting the pole terminal 300. The insulating spacer 200 is connected to the end of the cover plate 100 facing inwards from the housing. The second mounting hole 210 is aligned with the first mounting hole 110 so that the pole terminal 300 can be sequentially inserted into the first mounting hole 110 and the second mounting hole 210.

[0065] In this embodiment, the pole terminal 300 is used to connect with the lead-out piece, pole tab, etc. inside the housing. It can be columnar, block, or other structures. The pole terminal 300 can be composed of a pole core 310, an insulating ring 320, and a disc 330. To facilitate installation, the pole terminal 300, the cover plate 100, and the insulating spacer 200 form an installation gap 120. That is, the gap fit design facilitates insertion and avoids installation damage. The size of the installation gap 120 can be determined according to actual needs.

[0066] Furthermore, the pole terminal 300 is provided with a first stop portion 301, which can be a stop step. The first stop portion 301 is located in the installation gap 120 and is away from the insulating spacer 200 in order to restrict the movement of the sealing ring 400.

[0067] In this embodiment, the sealing ring 400 is used to isolate and insulate the cover plate 100 and the insulating spacer 200 from the pole terminal 300. It can be a rubber ring and is generally sleeve-shaped. The sealing ring 400 includes a sealing ring body 410 and a flange 420. The flange 420 is connected to the periphery of the sealing ring body 410 to form a step or a raised edge.

[0068] Specifically, such as Figure 2 As shown, the sealing ring body 410 is sleeved on the outer wall of the terminal 300 corresponding to the portion between the cover plate 100 and the insulating spacer 200. One end of the sealing ring body 410 abuts against the first stop portion 301, and the other end of the sealing ring body 410 abuts against the insulating spacer 200. In this way, the sealing ring body 410 can provide insulation between the cover plate 100 and the insulating spacer 200. Moreover, by positioning the flange 420 between the cover plate 100 and the insulating spacer 200, the flange 420 can prevent discharge between the junction of the terminal 300 and the sealing ring body 410 and the cover plate 100. In addition, a flow portion is provided between the sealing ring body 410 and / or flange 420 and the insulating spacer 200. This flow portion can be a gap, a groove, a channel, etc. The flow portion is used to connect the mounting gap 120 and the second mounting hole 210 so that the electrolyte in the housing can enter the mounting gap 120 through the flow portion and can also flow back into the housing through the flow portion.

[0069] It should be noted that components such as injection holes, plugs, and explosion-proof valves can also be installed on the cover plate 100, which can be determined according to actual needs.

[0070] Understandably, compared to existing technologies where a spacer and sealing ring are installed between the electrode core and the insulating spacer to easily form a one-way seal, the application of the battery cover in this embodiment of the application prevents liquid accumulation between the casing and the installation gap 120, thereby avoiding poor casing pressure caused by the formation of a secondary primary cell and ensuring the battery's usage requirements and performance. Furthermore, by integrating it into a single component, the sealing ring 400, it is less likely to be missed during installation, thus avoiding significant potential hazards.

[0071] Therefore, the battery cover provided in this embodiment includes a cover plate 100, an insulating spacer 200, a terminal post 300, and a sealing ring 400. A first mounting hole 110 is formed on the cover plate 100, and a second mounting hole 210 is formed on the insulating spacer 200. The insulating spacer 200 is connected to one end of the cover plate 100, and the second mounting hole 210 communicates with the first mounting hole 110. The terminal post 300 is sequentially inserted into the first mounting hole 110 and the second mounting hole 210, forming a mounting gap 120 with the cover plate 100 and the insulating spacer 200. A first stop 301 is provided on the terminal post 300, so that the first stop 301 is located in the mounting gap 120 and away from the insulating spacer 200. The sealing ring 400 includes a sealing ring body 410 and a connecting... The flange 420 on the periphery of the sealing ring body 410 allows the sealing ring body 410 to be fitted onto the terminal 300 and located in the installation gap 120. One end of the sealing ring body 410 abuts against the first stop 301, and the other end of the sealing ring body 410 abuts against the insulating spacer 200. This provides insulation between the terminal 300 and the cover plate 100. The flange 420 is located between the cover plate 100 and the insulating spacer 200, which reduces the risk of discharge between the terminal 300 and the cover plate 100. By leaving a flow portion between the sealing ring body 410 and / or the flange 420 and the insulating spacer 200, the electrolyte in the installation gap 120 can flow back into the casing through the flow portion, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance.

[0072] In one possible design, the flange 420 abuts against the insulating spacer 200. This arrangement increases the contact area with the insulating spacer 200, and the flange 420 and the insulating spacer 200 together isolate the terminal 300 and the cover plate 100, resulting in better discharge prevention.

[0073] Furthermore, in this embodiment, the thickness H of the flange 420 is 0.5mm to 1.2mm. For example, the thickness H of the flange 420 is 0.8mm. It should be noted that the thickness H of the flange 420 should not be too thin or too thick. If it is too thin, it will not be able to prevent discharge, while if it is too thick, it will enhance the sealing between the flange and the insulating spacer 200, which is not conducive to the backflow of the installation gap 120 from the flow section.

[0074] Furthermore, the thickness H of the flange 420 is also related to its material, so it can be determined according to actual needs, and no excessive restrictions are imposed in this embodiment.

[0075] In some embodiments, the sealing ring body 410 and the flange 420 are integrally formed, for example, by injection molding. This facilitates manufacturing and ensures product consistency.

[0076] In some embodiments, the sealing ring body 410 and the electrode terminal 300 are interference-fitted. This configuration serves two purposes: firstly, it provides a seal between the sealing ring body 410 and the electrode terminal 300, preventing electrolyte from flowing through; secondly, once the sealing ring body 410 is fitted onto the electrode terminal 300, it is less likely to move freely and fall off.

[0077] In some embodiments, the pole terminal 300 includes a pole core 310, an insulating ring 320 and a disc 330. The pole core 310 is sequentially inserted into the first mounting hole 110 and the second mounting hole 210. The pole core 310 has a second stop portion 302 on the side away from the insulating spacer 200.

[0078] The insulating ring 320 and the disc 330 are both sleeved on the pole core 310. One end of the insulating ring 320 is connected to the second stop part 302, and the other end of the insulating ring 320 is connected to one end of the disc 330. The other end of the disc 330 is connected to the other end of the cover plate 100.

[0079] The pole core 310, insulating ring 320, disc 330, cover plate 100 and insulating spacer 200 are arranged to form an installation gap 120. The sealing ring body 410 is sleeved on the pole core 310. The first stop part 301 is located on the insulating ring 320 at one end facing the insulating spacer 200.

[0080] Specifically, such as Figures 1-3 As shown, the electrode core 310 has a columnar structure and is used for conducting electricity. The electrode core 310 is inserted into the first mounting hole 110 and the second mounting hole 210 in sequence. The electrode core 310 is provided with a second stop part 302, which can be a stop step. The second stop part 302 is located on the side of the electrode core 310 away from the insulating spacer 200.

[0081] The insulating ring 320 can be a ceramic ring, serving as an isolation and insulation element. The disc 330 is a metal component, which facilitates fixing the insulating ring 320 to the pole core 310 and also reinforces the first mounting hole 110.

[0082] Both the insulating ring 320 and the disc 330 are fitted onto the pole core 310. One end of the insulating ring 320 is connected to the second stop 302. If the connection is made by brazing, one end of the insulating ring 320 is connected to one end of the disc 330. If the connection is made by brazing, the other end of the disc 330 is connected to the other end of the cover plate 100. That is, the disc 330 is connected to the side of the cover plate 100 away from the insulating spacer 200. It can also be connected by laser welding.

[0083] In this way, such as Figure 2 As shown, the electrode core 310, insulating ring 320, disc 330, cover plate 100 and insulating spacer 200 are arranged to form the above-mentioned installation gap 120. The sealing ring body 410 is sleeved on the electrode core 310, and the end of the sealing ring body 410 abuts against the insulating ring 320 to seal the gap at the junction of the electrode core 310 and the insulating ring 320.

[0084] Furthermore, in this embodiment, a first recessed platform 130 is provided on the cover plate 100, a first mounting hole 110 is located on the first recessed platform 130, and one end of the disc 330 facing away from the insulating ring 320 is connected to the first recessed platform 130.

[0085] And / or, the insulating spacer 200 is provided with a second recess 220, the second mounting hole 210 is located on the second recess 220, and the end of the sealing ring body 410 facing away from the insulating ring 320 abuts against the second recess 220.

[0086] Specifically, such as Figure 2 As shown, the first recessed platform 130 can be used to position the disc 330. The first mounting hole 110 is located on the first recessed platform 130. The disc 330 is embedded in the first recessed platform 130 and can be connected by laser welding. The specific size, depth, etc. of the first recessed platform 130 can be determined according to actual needs, and are not specifically limited in this embodiment.

[0087] Additionally, the second recessed platform 220 can be used to stop and limit the sealing ring body 410. The second mounting hole 210 is located on the second recessed platform 220, and the sealing ring body 410 abuts against the second recessed platform 220, ensuring that there is a flow space between the sealing ring body 410 and the second recessed platform 220. The specific size, depth, etc. of the second recessed platform 220 can also be determined according to actual needs, and are not specifically limited in this embodiment.

[0088] Furthermore, in this embodiment, a lead-out piece 500 is also included. The lead-out piece 500 abuts against the end of the insulating spacer 200 away from the cover plate 100, and the electrode core 310 is electrically connected to the lead-out piece 500.

[0089] And / or, it also includes a rupture disc 600 and a protective disc 700, a third mounting hole 140 is provided on the cover plate 100, the rupture disc 600 is sealed at the third mounting hole 140, and the protective disc 700 is connected to the periphery of the rupture disc 600 and the cover plate 100.

[0090] Specifically, such as Figure 2 , Figure 3 As shown, the lead-out piece 500 is used to connect the electrode core 310 and the battery cell, and also serves to conduct electricity. It is a metal component and can be plate-shaped, sheet-shaped, or other structures. The lead-out piece 500 is connected to the end of the insulating ring 200 facing away from the cover plate 100. The electrode core 310 and the lead-out piece 500 can be connected by laser welding. The specific size, shape, and structure of the lead-out piece 500 can be determined according to actual needs, and are not specifically limited in this embodiment.

[0091] Additionally, a rupture disc 600 and a protective plate 700 can be provided on the cover plate 100. The rupture disc 600 is also called an explosion-proof valve or explosion-proof disc, while the protective plate 700 is also called a plastic sheet or plastic plate. A third mounting hole 140 matching the rupture disc 600 is made on the cover plate 100. The rupture disc 600 is then placed in the third mounting hole 140, and the protective plate 700 is placed on top of the rupture disc 600 and connected to the cover plate 100, such as by adhesive bonding. The specific size, shape, and structure of the rupture disc 600 and the protective plate 700 can be determined according to actual needs; this embodiment does not impose specific limitations.

[0092] Secondly, embodiments of this application also provide a battery, including a battery cell, a housing, and a battery cover provided in any of the above embodiments, wherein the battery cell is disposed inside the housing, and a cover plate 100 in the battery cover covers the housing.

[0093] The structure of the battery cover has been described in detail in the above embodiments and will not be repeated here.

[0094] Specifically, the housing has an internal cavity for accommodating components such as battery cells. An installation port is provided on one side of the housing, which communicates with the cavity. The battery cell is inserted into the cavity through the installation port, covered by a cover plate 100, and then welded and sealed, thereby completing the assembly of the battery cell.

[0095] The battery provided in this embodiment of the application, by configuring a battery cover, includes a cover plate 100, an insulating spacer 200, terminal posts 300, and a sealing ring 400. A first mounting hole 110 is formed on the cover plate 100, and a second mounting hole 210 is formed on the insulating spacer 200. The insulating spacer 200 is connected to one end of the cover plate 100, and the second mounting hole 210 communicates with the first mounting hole 110. The terminal posts 300 are sequentially inserted into the first mounting hole 110 and the second mounting hole 210, forming a mounting gap 120 with the cover plate 100 and the insulating spacer 200. A first stop portion 301 is provided on the terminal posts 300, so that the first stop portion 301 is located in the mounting gap 120 and away from the insulating spacer 200. The sealing ring 400 includes a sealing ring body 41. The sealing ring body 410 and the flange 420 connected to the periphery of the sealing ring body 410 are fitted onto the terminal 300 and located in the installation gap 120. One end of the sealing ring body 410 abuts against the first stop 301, and the other end of the sealing ring body 410 abuts against the insulating spacer 200. This can isolate and insulate the terminal 300 from the cover plate 100. The flange 420 is located between the cover plate 100 and the insulating spacer 200, which can reduce the risk of discharge between the terminal 300 and the cover plate 100. By leaving a flow portion between the sealing ring body 410 and / or the flange 420 and the insulating spacer 200, the electrolyte in the installation gap 120 can flow back into the casing through the flow portion, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance.

[0096] Thirdly, embodiments of this application also provide a battery pack, including a battery pack body and at least one battery provided in any of the above embodiments disposed on the battery pack body.

[0097] For example, a number of the aforementioned batteries can be arranged side by side on the battery pack body. Of course, the battery pack body may also include a thermal management module, a controller, etc., to ensure the normal operation of the batteries, and its specific components can be determined according to actual needs.

[0098] It is understood that the battery pack provided in this application embodiment, by configuring the battery, includes a battery cover, which includes a cover plate 100, an insulating spacer 200, terminal posts 300, and a sealing ring 400. A first mounting hole 110 is formed on the cover plate 100, and a second mounting hole 210 is formed on the insulating spacer 200. The insulating spacer 200 is connected to one end of the cover plate 100, and the second mounting hole 210 communicates with the first mounting hole 110. The terminal posts 300 are sequentially inserted into the first mounting hole 110 and the second mounting hole 210, forming a mounting gap 120 with the cover plate 100 and the insulating spacer 200. A first stop 301 is provided on the terminal posts 300, so that the first stop 301 is located in the mounting gap 120 and away from the insulating spacer 200. The sealing ring 400 encloses... The battery includes a sealing ring body 410 and a flange 420 connected to the periphery of the sealing ring body 410. The sealing ring body 410 is fitted onto the terminal 300 and located in the installation gap 120, so that one end of the sealing ring body 410 abuts against the first stop 301 and the other end of the sealing ring body 410 abuts against the insulating spacer 200, which can isolate and insulate between the terminal 300 and the cover plate 100. The flange 420 is located between the cover plate 100 and the insulating spacer 200, which can reduce the risk of discharge between the terminal 300 and the cover plate 100. By leaving a flow portion between the sealing ring body 410 and / or the flange 420 and the insulating spacer 200, the electrolyte in the installation gap 120 can flow back into the casing through the flow portion, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance.

[0099] Fourthly, embodiments of this application also provide an electrical device, including a device body, on which a battery or battery pack provided in any of the above embodiments is disposed. The electrical device may include new energy vehicles, energy storage devices, etc.

[0100] It is understood that the electrical equipment provided in this application embodiment, by configuring the above-mentioned battery or a battery pack having the battery, the battery includes a battery cover, the battery cover including a cover plate 100, an insulating spacer 200, a terminal post 300 and a sealing ring 400, by opening a first mounting hole 110 on the cover plate 100 and a second mounting hole 210 on the insulating spacer 200, the insulating spacer 200 is connected to one end of the cover plate 100, and the second mounting hole 210 communicates with the first mounting hole 110, by sequentially inserting the terminal post 300 into the first mounting hole 110 and the second mounting hole 210, and forming an installation gap 120 with the cover plate 100 and the insulating spacer 200, by providing a first stop portion 301 on the terminal post 300, the first stop portion 301 is located in the installation gap 120 and away from the insulating spacer 200, and the sealing ring 400 is sealed. The sealing ring 400 includes a sealing ring body 410 and a flange 420 connected to the periphery of the sealing ring body 410. The sealing ring body 410 is sleeved on the terminal 300 and located in the installation gap 120, so that one end of the sealing ring body 410 abuts against the first stop 301 and the other end of the sealing ring body 410 abuts against the insulating spacer 200, which can isolate and insulate between the terminal 300 and the cover plate 100. The flange 420 is located between the cover plate 100 and the insulating spacer 200, which can reduce the risk of discharge between the terminal 300 and the cover plate 100. By leaving a flow portion between the sealing ring body 410 and / or the flange 420 and the insulating spacer 200, the electrolyte in the installation gap 120 can flow back into the casing through the flow portion, thereby avoiding poor casing pressure caused by the formation of a secondary galvanic cell and ensuring the battery's usage requirements and performance.

[0101] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0102] It should be understood that this application is not limited to the precise structures described above and shown in the appendix, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery cover, characterized in that, It includes a cover plate (100), an insulating spacer (200), a pole terminal (300) and a sealing ring (400), wherein the cover plate (100) is provided with a first mounting hole (110); The insulating spacer (200) has a second mounting hole (210), the insulating spacer (200) is connected to one end of the cover plate (100), and the second mounting hole (210) communicates with the first mounting hole (110); The pole terminal (300) is sequentially inserted into the first mounting hole (110) and the second mounting hole (210), and forms a mounting gap (120) with the cover plate (100) and the insulating spacer (200); the pole terminal (300) has a first stop (301), which is located in the mounting gap (120) and away from the insulating spacer (200). The sealing ring (400) includes a sealing ring body (410) and a flange (420) connected to the periphery of the sealing ring body (410). The sealing ring body (410) is sleeved on the pole terminal (300) and located in the installation gap (120). One end of the sealing ring body (410) abuts against the first stop (301), and the other end of the sealing ring body (410) abuts against the insulating spacer (200). The flange (420) is located between the cover plate (100) and the insulating spacer (200), and a flow portion is provided between the sealing ring body (410) and / or the flange (420) and the insulating spacer (200).

2. The battery cover according to claim 1, characterized in that, The flange (420) abuts against the insulating spacer (200).

3. The battery cover according to claim 2, characterized in that, The thickness of the flange (420) is 0.5mm to 1.2mm.

4. The battery cover according to claim 1, characterized in that, The sealing ring body (410) and the flange (420) are integrally formed.

5. The battery cover according to claim 1, characterized in that, The sealing ring body (410) and the pole terminal (300) are interference fit.

6. The battery cover according to any one of claims 1 to 5, characterized in that, The pole terminal (300) includes a pole core (310), an insulating ring (320) and a disc (330). The pole core (310) is sequentially inserted into the first mounting hole (110) and the second mounting hole (210). The pole core (310) has a second stop (302) on the side away from the insulating spacer (200). The insulating ring (320) and the disc (330) are both sleeved on the pole core (310). One end of the insulating ring (320) is connected to the second stop (302), the other end of the insulating ring (320) is connected to one end of the disc (330), and the other end of the disc (330) is connected to the other end of the cover plate (100). The pole core (310), the insulating ring (320), the disc (330), the cover plate (100), and the insulating spacer (200) surround and form the installation gap (120). The sealing ring body (410) is sleeved on the pole core (310), and the first stop (301) is located on the insulating ring (320) at one end facing the insulating spacer (200).

7. The battery cover according to claim 6, characterized in that, The cover plate (100) is provided with a first recessed platform (130), the first mounting hole (110) is located on the first recessed platform (130), and one end of the disc (330) facing away from the insulating ring (320) is connected to the first recessed platform (130); And / or, the insulating spacer (200) is provided with a second recess (220), the second mounting hole (210) is located on the second recess (220), and one end of the sealing ring body (410) facing away from the insulating ring (320) abuts against the second recess (220).

8. The battery cover according to claim 6, characterized in that, It also includes a lead-out piece (500) that abuts against the insulating spacer (200) at one end away from the cover plate (100), and the pole core (310) is electrically connected to the lead-out piece (500); And / or, it also includes a rupture disc (600) and a protective plate (700), wherein a third mounting hole (140) is provided on the cover plate (100), the rupture disc (600) is sealed at the third mounting hole (140), and the protective plate (700) is connected to the periphery of the rupture disc (600) and the cover plate (100).

9. A battery, characterized in that, It includes a battery cell, a housing, and a battery cover as described in any one of claims 1 to 8, wherein the battery cell is disposed within the housing, and the cover plate (100) of the battery cover covers the housing.

10. A battery pack, characterized in that, It includes a battery pack body and at least one battery as described in claim 9 disposed on the battery pack body.

11. An electrical appliance, characterized in that, The device body, wherein the battery as described in claim 9 is disposed on the device body; Alternatively, the device body may be provided with a battery pack as described in claim 10.

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