Battery and battery pack with same

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and a battery pack with the battery, and the battery comprises a shell with two openings; the two cover plate assemblies comprise pole columns and cover plates, the cover plates cover the openings, the pole columns are arranged on the cover plates, one of the two cover plates is a first cover plate, the other cover plate is a second cover plate, and the second cover plate is provided with an opening; the sealing plate is connected with the second cover plate and seals and covers the opening; one of the insulating plate and the sealing plate is provided with a first clamping piece, the other one of the insulating plate and the sealing plate is provided with a second clamping piece, the first clamping piece comprises a plurality of clamping parts, and the clamping parts are clamped and matched with the second clamping piece; the pole group is arranged in the shell and comprises a first pole lug and a second pole lug, the first pole lug is connected with the pole column of the first cover plate, the second pole lug is connected with the pole column of the second cover plate through a connecting piece, and a part of the second pole lug is located between the connecting piece and the insulating plate. The second tab and the connecting piece of the battery are convenient to connect, and the insulating property is good.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and a battery pack having the same. Background Art

[0002] In related art, for a battery, it is usually necessary to weld a connecting piece to a tab. The connecting piece and the tab are usually welded outside the battery housing to avoid interference of the battery housing with the welding. In some processing techniques, in order to facilitate welding, a through hole is formed in the battery housing to expose the connecting piece and the tab for welding, and then the through hole is covered with a sealing plate. Short circuit is likely to occur between the sealing plate and the tab. Content of the Utility Model

[0003] In view of this, the utility model provides a battery and a battery pack having the same to solve the problem that short circuit is likely to occur between the sealing plate and the tab.

[0004] In a first aspect, the utility model provides a battery, comprising: a housing having two openings located on opposite sides of the housing; two cover plate assemblies respectively disposed on opposite sides of the housing, each cover plate assembly including a pole column and a cover plate, the cover plate being connected to the housing and covering the opening, the pole column being connected to the cover plate, one of the two cover plates being a first cover plate and the other being a second cover plate, the second cover plate being provided with an open mouth; a sealing plate connected to the second cover plate and covering the open mouth; an insulating plate, one of the insulating plate and the sealing plate being provided with a first engaging member and the other being provided with a second engaging member, the first engaging member including a plurality of engaging portions spaced along the circumference of the second engaging member, each engaging portion being in engaging cooperation with the second engaging member; a pole group disposed in the housing and including a first tab and a second tab, the first tab being connected to the pole column of the first cover plate, the second tab being connected to the pole column of the second cover plate through a connecting piece, and a part of the second tab being located between the connecting piece and the insulating plate.

[0005] Beneficial effects: By providing a sealing plate, the open end can be sealed, preventing the connecting piece, the second tab, and the electrode group from being exposed to the air, reducing the probability of contact between the connecting piece, the second tab, and the electrode group and the outside world, ensuring the normal operation of the battery, and reducing the probability of battery damage. By providing an insulating plate, both the second tab and the connecting piece can be isolated from the sealing plate, thus preventing the sealing plate from being charged and causing battery leakage, ensuring the insulation performance between the second tab and the sealing plate, and improving the reliability of the battery. In addition, the insulating plate and the sealing plate are cooperatively provided through the second clamping member and the first clamping member, increasing the contact surface between the sealing plate and the insulating plate, improving the binding force of the sealing plate on the insulating plate, fully ensuring the connection strength between the sealing plate and the insulating plate, improving the sealing performance, and since the second tab is located between the insulating plate and the connecting piece, the second tab only needs to be bent once, which can reduce the bending of the second tab, reduce the processing difficulty, and improve the space utilization rate inside the battery. In addition, the first cover plate and the second cover plate are respectively arranged on opposite sides of the housing, and the two pole columns are respectively arranged on opposite sides of the housing, which can reduce the thickness and width of the battery, facilitating the expansion of the application range of the battery.

[0006] In an alternative embodiment, the clamping portion includes: a base; an inverted buckle portion, the inverted buckle portion is connected to the top end of the base, and the size of the outer peripheral surface of the base exceeding the outer peripheral surface of the base is R, where R ≥ 0.5 mm.

[0007] Beneficial effects: The cooperation area between the inverted buckle portion and the second clamping member is large, which is beneficial to improving the assembly strength between the sealing plate and the insulating plate and reducing the probability of separation between the sealing plate and the insulating plate.

[0008] In an alternative embodiment, the diameter W of the bottom end of the base is 0.35 mm to 1.2 mm.

[0009] Beneficial effects: The area of the base is large, which can improve the structural strength of the bottom of the base, ensure the strength of the first clamping member during the assembly and disassembly of the sealing plate and the insulating plate, and reduce the probability of breakage of the first clamping member.

[0010] In an alternative embodiment, the height t1 of the inverted buckle portion is 0.25 mm to 0.55 mm.

[0011] Beneficial effects: The inverted buckle portion has sufficient structural strength and is not easily deformed, which can ensure the connection reliability between the sealing plate and the insulating plate, and the thickness of the insulating plate and the sealing plate can be reduced, saving space, improving the space utilization rate, and also avoiding the excessive height of the base and reducing the probability of bending of the base.

[0012] In an optional embodiment, the second clamping member is configured as a clamping groove, and an annular rib is provided on the inner wall of the second clamping member. The annular rib is inserted into the undercut portion and is located on the side of the undercut portion facing the base, and a height t2 of the annular rib is 0.25 mm to 0.55 mm.

[0013] Beneficial effects: The structural strength of the annular rib is sufficient and not easy to deform, which can ensure the reliability of the connection between the sealing plate and the insulating plate. The thickness of the insulating plate and the sealing plate can be reduced, saving space and improving space utilization. It can also avoid the height of the base being too large and reduce the probability of the base bending.

[0014] In an optional embodiment, the annular rib includes: a first ring segment, the diameter of which gradually decreases in a direction away from the bottom of the groove of the second clip; and a second ring segment, the second ring segment is connected to the first ring segment and is located on the side of the first ring segment facing away from the bottom of the groove of the second clip, and the diameter of the second ring segment gradually increases in a direction away from the first ring segment.

[0015] Beneficial effect: the first clamping component can be easily inserted into the second clamping component, and the plugging is convenient; at the same time, the first clamping component can be effectively limited, thereby improving the stability of the relative position between the sealing plate and the insulating plate.

[0016] In an optional embodiment, the angle between the inner circumference of the first ring segment and the central axis of the second clamping member is 10° to 80°.

[0017] Beneficial effect: It can ensure that the clamping part is reset to achieve the connection between the first clamping part and the second clamping part, and can also avoid the clamping part from being reset too quickly, thereby ensuring the stability of the relative position between the sealing plate and the insulating plate.

[0018] In an optional embodiment, the first cover plate is provided with a liquid injection hole and / or an explosion-proof valve.

[0019] Beneficial effects: the arrangement on the second cover plate is not affected, the setting of the open opening is convenient, the connection between the second pole ear and the connecting sheet is convenient, and the connection between the sealing plate and the second cover plate is also convenient.

[0020] In an optional embodiment, there are multiple first clips, and the multiple first clips are arranged at intervals along the length direction of the sealing plate; there are multiple second clips, and the multiple second clips are arranged at intervals along the length direction of the insulating plate, and the multiple first clips and the multiple second clips are connected one by one.

[0021] Beneficial effects: By setting a plurality of first clamping members and a plurality of second clamping members to cooperate, there are multiple-point connections between the sealing plate and the insulating plate, which can improve the connection strength between the sealing plate and the insulating plate and ensure the reliability of the relative position between the sealing plate and the insulating plate.

[0022] In a second aspect, the present utility model further provides a battery pack, including the battery described in the embodiments of the first aspect.

[0023] Beneficial effects: The battery pack has the advantages of good insulation performance, convenient connection and high space utilization rate. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Partial structural schematic diagram of the battery according to the embodiment of the present utility model;

[0026] Figure 2 Partial cross-sectional view of the battery according to the embodiment of the present utility model;

[0027] Figure 3 Schematic diagram of the cooperation between the sealing plate and the insulating plate of the battery according to the embodiment of the present utility model;

[0028] Figure 4 Cross-sectional view of the sealing plate and the insulating plate of the battery according to the embodiment of the present utility model;

[0029] Figure 5 Structural schematic diagram of the sealing plate of the battery according to the embodiment of the present utility model;

[0030] Figure 6 Cross-sectional view of the sealing plate of the battery according to the embodiment of the present utility model;

[0031] Figure 7 Structural schematic diagram of the insulating plate of the battery according to the embodiment of the present utility model;

[0032] Figure 8 Cross-sectional view of the insulating plate of the battery according to the embodiment of the present utility model;

[0033] Figure 9 Schematic diagram of the cooperation between the housing, the second cover assembly and the second ear of the battery according to the embodiment of the present utility model;

[0034] Figure 10This is a schematic diagram of the cooperation between the battery housing and the second cover plate of an embodiment of the utility model;

[0035] Figure 11 A cross-sectional view of a second cover assembly of a battery according to an embodiment of the utility model;

[0036] Figure 12 This is a schematic diagram of the structure of the first cover assembly of the battery according to an embodiment of the utility model

[0037] Description of reference numerals:

[0038] 1. Battery; 100. Shell; 200. Electrode group; 220. Second pole ear; 310. Pole; 320. Connecting piece; 400. Sealing plate; 410. Second clamping piece; 411. Annular rib; 412. First ring segment; 413. Second ring segment; 500. Insulating plate; 510. First clamping piece; 511. Base; 512. Undercut; 513. Clamping part; 600. First cover plate; 610. Explosion-proof valve; 620. Liquid injection hole; 700. Second cover plate; 710. Open mouth. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0040] All other obtained embodiments fall within the scope of protection of the present utility model.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, the meaning of "plurality" is two or more. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] The following combines Figures 1 to 12 to describe the embodiments of the present utility model.

[0045] According to an embodiment of the present utility model, on the one hand, a battery 1 is provided. The battery 1 includes a housing 100, a pole group 200, a cover plate assembly, a sealing plate 400, and an insulating plate 500.

[0046] The housing 100 has two openings, and the two openings are located on opposite sides of the housing 100, that is, one of the opposite sides of the housing 100 is provided with one opening, and the other of the opposite sides of the housing 100 is provided with the other opening.

[0047] The pole group 200 is disposed in the housing 100 and includes a first pole tab and a second pole tab 220. The pole group 200 may further include a pole group body. Both the first pole tab and the second pole tab 220 are connected to the pole group body, and the first pole tab and the second pole tab 220 are located on opposite sides of the pole group body.

[0048] Two cover plate assemblies are respectively disposed on opposite sides of the housing 100. The cover plate assembly includes a pole post 310 and a cover plate. The cover plate is connected to the housing 100 and seals the opening. The pole post 310 is connected to the cover plate. One of the two cover plates is a first cover plate 600 and the other is a second cover plate 700. The second cover plate 700 is provided with an open mouth 710.

[0049] The sealing plate 400 is connected to the second cover plate 700 and seals the open mouth 710. One of the insulating plate 500 and the sealing plate 400 is provided with a first engaging member 510 and the other is provided with a second engaging member 410. The first engaging member 510 includes a plurality of engaging portions 513. The plurality of engaging portions 513 are spaced along the circumference of the second engaging member 410. Each engaging portion 513 is elastically deformable and engages with the second engaging member 410. Since the plurality of engaging portions 513 are spaced, the structural strength of each engaging portion 513 is relatively low, and the engaging portion 513 is convenient for elastic deformation, thereby facilitating the connection and separation between the sealing plate 400 and the insulating plate 500.

[0050] The pole post 310 of the first cover plate 600 is connected to the first pole ear, and the pole post 310 of the second cover plate 700 is connected to the second pole ear 220 through the connecting piece 320. A part of the second pole ear 220 is located between the insulating plate 500 and the connecting piece 320.

[0051] For example, the second clamping member 410 can be circular, square, oval, polygonal, racetrack-shaped, etc. The shape of the first clamping member 510 can be adapted to the shape of the second clamping member 410, and the sealing plate 400 and the insulating plate 500 can be injection-molded and connected.

[0052] Among them, the second clamping member 410 can be a clamping groove, and the first clamping member 510 is inserted into the second clamping member 410, and the outer peripheral surface of the clamping portion 513 is clamped and matched with the inner peripheral surface of the second clamping member 410; alternatively, the second clamping member 410 can be a clamping post, and the second clamping member 410 is inserted into the first clamping member 510, and the inner peripheral surface of the clamping portion 513 is clamped and matched with the outer peripheral surface of the second clamping member 410.

[0053] The following describes the process of battery 1 processing by way of example:

[0054] First, connect the pole post 310 of the first cover plate 600 and the first pole ear, then insert the pole group 200 into the housing 100 through the first opening, and connect the first cover plate 600 and the housing 100 so that the first cover plate 600 seals the opening. Welding can be performed between the first cover plate 600 and the housing 100.

[0055] Then, connect the second cover plate 700 and the housing 100 so that the second cover plate 700 seals another opening, and the second pole ear 220 exposes from the open opening 710. Welding can be performed between the second cover plate 700 and the housing 100.

[0056] Next, bend a part of the second pole ear 220 above the connecting piece 320, and then weld the second pole ear 220 and the connecting piece 320. For example, welding processes such as laser welding or ultrasonic welding can be used to weld between the connecting piece 320 and the second pole ear 220.

[0057] Finally, insert the first clamping member 510 into the second clamping member 410 to fix the relative positions of the sealing plate 400 and the insulating plate 500, and connect the sealing plate 400 and the second cover plate 700 so that the sealing plate 400 seals the open opening 710. Welding can be performed between the sealing plate 400 and the second cover plate 700.

[0058] By providing the open opening 710, it is convenient for welding between the connecting piece 320 and the second pole ear 220, and it is also convenient for bending the second pole ear 220, reducing the bending process of the second pole ear 220 and improving the production efficiency.

[0059] By providing the sealing plate 400, the open mouth 710 can be sealed, preventing the connecting piece 320, the second tab 220, and the electrode group 200 from being exposed to the air, reducing the probability of contact between the connecting piece 320, the second tab 220, and the electrode group 200 and the outside world, ensuring the normal operation of the battery 1, and reducing the probability of damage to the battery 1. Among them, the sealing plate 400 can be made of a metal material, and the sealing plate 400 and the second cover plate 700 can be welded. The connection strength between the sealing plate 400 and the second cover plate 700 is high and the sealing performance is good. The insulating plate 500 can be made of a heat-melt material such as insulating plastic.

[0060] By providing the insulating plate 500, both the second tab 220 and the connecting piece 320 can be isolated from the sealing plate 400, thereby preventing the sealing plate 400 from being charged and causing the battery 1 to leak electricity. The insulation performance between the second tab 220 and the sealing plate 400 can be ensured, improving the reliability of the battery 1. In addition, the insulating plate 500 and the sealing plate 400 are provided in cooperation with the second engaging member 410 and the first engaging member 510, increasing the contact surface between the sealing plate 400 and the insulating plate 500, improving the binding force of the sealing plate 400 on the insulating plate 500, fully ensuring the connection strength between the sealing plate 400 and the insulating plate 500, improving the sealing performance, and since a part of the second tab 220 is located between the insulating plate 500 and the connecting piece 320, the second tab 220 only needs to be bent once, which can reduce the bending process of the second tab 220, reduce the processing difficulty, and improve the space utilization rate inside the battery 1.

[0061] In addition, the first cover plate 600 and the second cover plate 700 can be respectively arranged on opposite sides in the length direction of the housing 100, and the two pole posts 310 are respectively arranged on opposite sides of the housing 100, which can reduce the thickness and width of the battery 1, facilitating the expansion of the application range of the battery 1.

[0062] As Figure 8 shown, in the technical solution of this embodiment, the engaging portion 513 includes a base 511 and an inverted buckle portion 512. The inverted buckle portion 512 is connected to the top end of the base 511. The outer peripheral surface of the base 511 exceeds the outer peripheral surface of the base 511 by a dimension of R, and R ≥ 0.5 mm. Among them, R can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0063] In this way, the mating area between the inverted buckle portion 512 and the second engaging member 410 is large, which is beneficial to improving the assembly strength between the sealing plate 400 and the insulating plate 500 and reducing the separation probability of the sealing plate 400 and the insulating plate 500.

[0064] As Figure 8As shown, in the technical solution of this embodiment, the diameter W of the bottom end of the base 511 is 0.35mm-1.2mm, wherein the diameter W of the bottom end of the base 511 can be 0.35mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, or 1.2mm. In this way, the base 511 has a larger area, which can improve the structural strength of the bottom of the base 511, ensure the strength of the first clamping member 510 during the assembly and disassembly process of the sealing plate 400 and the insulating plate 500, and reduce the probability of the first clamping member 510 breaking.

[0065] like Figure 8 As shown, in the technical solution of this embodiment, the height t1 of the undercut portion 512 is 0.25 mm to 0.55 mm, and the height t1 of the undercut portion 512 can be 0.25 mm, 0.3 mm, 0.45 mm, 0.5 mm or 0.55 mm.

[0066] If the height t1 of the undercut portion 512 is less than 0.25 mm, the strength of the undercut portion 512 is too low and it is easy to deform, causing the sealing plate 400 and the insulating plate 500 to be easily separated and the connection reliability to be poor; if the height t1 of the undercut portion 512 is greater than 0.55 mm, it may cause the thickness of the insulating plate 500 and the sealing plate 400 to increase, thereby excessively occupying the space inside the shell 100.

[0067] By setting t1 to 0.25mm~0.55mm, the structural strength of the undercut portion 512 is sufficient and not prone to deformation, which can ensure the connection reliability between the sealing plate 400 and the insulating plate 500, and the thickness of the insulating plate 500 and the sealing plate 400 can be reduced, saving space and improving space utilization. It can also avoid the height of the base 511 being too large and reduce the probability of the base 511 bending.

[0068] like Figure 4 and Figure 6 As shown, in the technical solution of this embodiment, the second clip 410 is constructed as a clip groove, and the inner wall of the second clip 410 is provided with an annular rib 411, and the annular rib 411 is inserted on the side of the undercut portion 512 facing the base 511, and the height t2 of the annular rib 411 is 0.25mm~0.55mm, and the height t2 of the annular rib 411 can be 0.25mm, 0.3mm, 0.45mm, 0.5mm or 0.55mm.

[0069] If the height t2 of the annular rib 411 is less than 0.25 mm, the strength of the annular rib 411 is too low and it is easy to deform, causing the sealing plate 400 and the insulating plate 500 to be easily separated and the connection reliability to be poor; if the height t2 of the annular rib 411 is greater than 0.55 mm, it is easy to cause the height of the base 511 to be too large, and the base 511 is easy to bend, affecting the structural stability of the first clip 510, and may cause the thickness of the insulating plate 500 and the sealing plate 400 to increase, excessively occupying the space inside the shell 100.

[0070] By setting t2 to 0.25mm~0.55mm, the structural strength of the annular rib 411 is sufficient and not prone to deformation, which can ensure the connection reliability of the sealing plate 400 and the insulating plate 500, and the thickness of the insulating plate 500 and the sealing plate 400 can be reduced, saving space and improving space utilization. It can also avoid the height of the base 511 being too large and reduce the probability of the base 511 bending.

[0071] like Figure 4 and Figure 8 As shown, in the technical solution of this embodiment, the annular rib 411 includes a first ring segment 412 and a second ring segment 413 .

[0072] The diameter of the first ring segment 412 gradually decreases away from the groove bottom of the second clamping member 410, the second ring segment 413 is connected to the first ring segment 412 and is located on the side of the first ring segment 412 facing away from the groove bottom of the second clamping member 410, and the diameter of the second ring segment 413 gradually increases away from the first ring segment 412. The inner circumferential surface of the first ring segment 412 can be configured as an arc surface to reduce the difficulty of processing and improve the guiding efficiency.

[0073] When the first clip 510 is inserted into the second clip 410, the first clip 510 is first inserted into the second ring segment 413. The end of the second ring segment 413 away from the first ring segment 412 has the largest diameter, which is convenient for the insertion of the first clip 510 and can guide the first clip 510, thereby reducing the difficulty of plugging the first clip 510 and the second clip 410. As the first clip 510 goes deeper, the second ring segment 413 gradually presses the clipping portion 513 of the first clip 510 to cause elastic deformation. Then, the first clip 510 is inserted into the first ring segment 412, and the clipping portion 513 is gradually reset. Since the diameter of the connection between the first ring segment 412 and the second ring segment 413 is the minimum diameter of the annular rib 411, the clipping portion 513 can be limited, thereby reducing the probability of the first clip 510 detaching from the second clip 410.

[0074] The size of the base 511 may gradually increase from low to high, and the size of the base 511 gradually increases toward the undercut portion 512 , so that the shape of the annular rib 411 matches the shape of the base 511 .

[0075] In this way, it is convenient for the first clamping member 510 to be inserted into the second clamping member 410, facilitating the insertion, and it can effectively limit the first clamping member 510, improving the stability of the relative position between the sealing plate 400 and the insulating plate 500.

[0076] Furthermore, the included angle between the inner peripheral surface of the first ring segment 412 and the central axis of the second clamping member 410 is 10° to 80°, that is, the included angle between the inner peripheral surface of the first ring segment 412 and the central axis of the second clamping member 410 can be 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 75°, 70°, 75° or 80°.

[0077] When the included angle between the inner peripheral surface of the first ring segment 412 and the central axis of the second clamping member 410 is less than 10°, the inclination angle of the inner peripheral surface of the first ring segment 412 is too small to guide the clamping portion 513 to reset, resulting in the clamping portion 513 always remaining in the elastically deformed state, and the first clamping member 510 is easily pulled out from the second clamping member 410; when the included angle between the inner peripheral surface of the first ring segment 412 and the central axis of the second clamping member 410 is less than 90°, the inclination angle of the inner peripheral surface of the first ring segment 412 is too small, and the clamping portion 513 resets too quickly, and the first clamping member 510 may shake within the second clamping member 410, resulting in unreliable positioning between the sealing plate 400 and the insulating plate 500.

[0078] By limiting the included angle between the inner peripheral surface of the first ring segment 412 and the central axis of the second clamping member 410 to 10° to 80°, it can not only ensure the reset of the clamping portion 513 to realize the connection between the first clamping member 510 and the second clamping member 410, but also avoid the too fast reset of the clamping portion 513 and ensure the stability of the relative position between the sealing plate 400 and the insulating plate 500.

[0079] As Figure 6 shown, in the technical solution of this embodiment, the thickness T of the sealing plate 400 is 1.2 mm to 1.8 mm. If T is less than 1.2 mm, the thickness of the sealing plate 400 is too thin, the structural strength is low, and the sealing plate 400 is easily damaged; if T is greater than 1.8 mm, the thickness of the sealing plate 400 is too thick, occupying too much internal space of the housing 100 and affecting the arrangement of the electrode group 200. By setting T to 1.2 mm to 1.8 mm, the sealing plate 400 has a relatively high structural strength and is not easily damaged, and the thickness of the sealing plate 400 is relatively thin, occupying less space of the housing 100, saving internal space and improving space utilization.

[0080] As Figure 12As shown, in the technical solution of this embodiment, the first cover plate 600 is provided with a liquid injection hole 620. In this way, liquid injection into the battery 1 can be achieved, and since the liquid injection hole 620 is provided on the first cover plate 600, it will not affect the layout on the second cover plate 700, facilitating the setting of the open mouth 710, and facilitating the connection between the second tab 220 and the connecting piece 320, and also facilitating the connection between the sealing plate 400 and the second cover plate 700.

[0081] As Figure 12 shown, in the technical solution of this embodiment, the first cover plate 600 is provided with an explosion-proof valve 610. In this way, explosion of the battery 1 can be avoided, and since the explosion-proof valve 610 is provided on the first cover plate 600, it will not affect the layout on the second cover plate 700, facilitating the setting of the open mouth 710, and facilitating the connection between the second tab 220 and the connecting piece 320, and also facilitating the connection between the sealing plate 400 and the second cover plate 700.

[0082] In addition, the liquid injection hole 620 and the explosion-proof valve 610 can both be provided on the first cover plate 600, and the liquid injection hole 620, the explosion-proof valve 610 and the terminal 310 can be arranged along the length direction of the first cover plate 600.

[0083] As Figures 4 to 8 shown, in the technical solution of this embodiment, there are multiple first engaging members 510, and the multiple first engaging members 510 are arranged at intervals along the length direction of the sealing plate 400. There are multiple second engaging members 410, and the multiple second engaging members 410 are arranged at intervals along the length direction of the insulating plate 500, and the multiple first engaging members 510 and the multiple second engaging members 410 are connected in a one-to-one correspondence.

[0084] By arranging the cooperation of the multiple first engaging members 510 and the multiple second engaging members 410, there are multiple connection points between the sealing plate 400 and the insulating plate 500, which can improve the connection strength between the sealing plate 400 and the insulating plate 500 and ensure the relative position reliability between the sealing plate 400 and the insulating plate 500. In addition, since the width of the battery 1 is reduced, the widths of the sealing plate 400 and the insulating plate 500 are also reduced accordingly. By arranging the multiple first engaging members 510 at intervals along the length direction of the sealing plate 400 and arranging the multiple second engaging members 410 at intervals along the length direction of the insulating plate 500, the number of the second engaging members 410 and the number of the first engaging members 510 can be increased, further improving the connection strength between the sealing plate 400 and the insulating plate 500.

[0085] According to an embodiment of the present invention, on the other hand, a battery pack is also provided, including the battery 1 of the above embodiment. The battery pack of the embodiment of the present invention has the advantages of convenient processing and good insulation performance by using the battery 1.

[0086] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that, Comprising: A housing having two openings disposed on opposite sides of the housing; Two cover plate assemblies disposed on opposite sides of the housing. The cover plate assembly includes a terminal post and a cover plate. The cover plate is connected to the housing and seals the opening. The terminal post is connected to the cover plate. One of the two cover plates is a first cover plate and the other is a second cover plate. The second cover plate is provided with an open mouth; A sealing plate connected to the second cover plate and sealing the open mouth; An insulating plate, one of the insulating plate and the sealing plate is provided with a first engaging member and the other is provided with a second engaging member. The first engaging member includes a plurality of engaging portions. The plurality of engaging portions are spaced along the circumference of the second engaging member. Each engaging portion is in engaging cooperation with the second engaging member; A pole group disposed in the housing and including a first pole tab and a second pole tab. The first pole tab is connected to the terminal post of the first cover plate. The second pole tab is connected to the terminal post of the second cover plate through a connecting piece. A part of the second pole tab is located between the connecting piece and the insulating plate.

2. The battery according to claim 1, wherein The engaging portion includes: A base; An inverted buckle portion connected to the top end of the base. The outer peripheral surface of the inverted buckle portion extends beyond the outer peripheral surface of the base by a dimension R, where R≥0.5 mm.

3. The battery according to claim 2, wherein The diameter W of the bottom end of the base is 0.35 mm to 1.2 mm.

4. The battery according to claim 2, characterized in that, The height t1 of the inverted buckle portion is 0.25 mm to 0.55 mm.

5. The battery according to claim 2, wherein The second engaging member is configured as a card slot. The inner wall of the second engaging member is provided with an annular rib. The annular rib is located on the side of the inverted buckle portion facing the base. The height t2 of the annular rib is 0.25 mm to 0.55 mm.

6. The battery according to claim 5, characterized in that, The annular rib includes: A first ring segment whose diameter gradually decreases in a direction away from the bottom of the second engaging member; A second ring segment connected to the first ring segment and located on the side of the first ring segment facing away from the bottom of the second engaging member. The diameter of the second ring segment gradually increases in a direction away from the first ring segment.

7. The battery according to claim 6, characterized in that, The included angle between the inner peripheral surface of the first ring segment and the central axis of the second engaging member is 10° to 80°.

8. The battery according to any one of claims 1-7, characterized in that, The first cover plate is provided with a liquid injection hole and / or an explosion-proof valve.

9. The battery according to any one of claims 1-7, characterized in that, The first engaging members are multiple, and the multiple first engaging members are spaced along the length direction of the sealing plate; The second engaging members are multiple, and the multiple second engaging members are spaced along the length direction of the insulating plate. The multiple first engaging members and the multiple second engaging members are connected in one-to-one correspondence.

10. A battery pack, characterized in that, Including the battery according to any one of claims 1-9.

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