Battery and battery module

Abstract

The utility model relates to a battery and a battery module, and relates to the technical field of new energy battery modules. The utility model provides a battery. The battery comprises two pole assemblies, the two pole assemblies are arranged on the cover plate, a first groove is formed in the front face of the cover plate, the first groove is arranged opposite to one pole assembly, and the first groove is arranged between one pole assembly and the short edge of the cover plate. The first groove is formed, and the depth of the first groove is large, so that on one hand, fool-proof design is more obvious, and safety accidents caused by wrong manual assembly due to the fact that the fool-proof design is not obvious during manual feeding are avoided; on the other hand, the first groove is obvious and is not easy to identify mistakes, so that the situation that grabbing of equipment is affected due to unclear punching or shielding during feeding of the robot is avoided; meanwhile, the strength of the cover plate is increased, and any function and the internal space of the battery cell are not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery module technical field, specifically, relate to a kind of battery and battery module. BACKGROUND

[0002] The cover plate in the related art distinguishes positive and negative, usually adopts different color positive pole post injection molding piece and negative pole post injection molding piece to distinguish;Or distinguish by increasing "+" "-" mark on cover plate sheet or pole post.

[0003] The inventor found that, when the battery cell is assembled into a module, it is usually manually or robotically loaded. When manually loaded, the "+" "-" pole mark is usually designed to be not too large and not eye-catching, and long-time work leads to visual fatigue, so that the positive and negative poles are reversed, which can easily cause short circuit when welded and connected, thereby causing safety accidents. When robotically loaded, the "+" "-" mark is recognized by a vision system to distinguish positive and negative. If the positive and negative pole marks are not clear or are covered, the normal recognition is failed, thereby causing failure in grabbing. SUMMARY

[0004] The utility model aims to provide a kind of battery and battery module, it is prevented by setting more obvious first recess and identified.

[0005] The embodiment of the utility model can be realized as follows:

[0006] In a first aspect, the utility model provides a battery, comprising: two pole post assemblies;Cover plate, two pole post assemblies are arranged on the cover plate, the front surface of the cover plate is provided with first recess, the first recess is arranged opposite one of the pole post assemblies, and the first recess is arranged between one of the pole post assemblies and the short side of the cover plate.

[0007] Optionally, the two pole post assemblies include a positive pole post assembly and a negative pole post assembly, and the first recess is arranged opposite the negative pole post assembly.

[0008] The first recess is arranged along the extension direction of the short side of the cover plate.

[0009] Optionally, the back surface of the cover plate is provided with a protrusion arranged opposite the first recess.

[0010] The battery further comprises a lower plastic, and the lower plastic is arranged at the bottom of the cover plate. The two pole post assemblies are arranged on the cover plate and the lower plastic. The front surface of the lower plastic is provided with a second recess, and the protrusion is fitted and accommodated in the second recess.

[0011] The back surface of the lower plastic is provided with a first boss and a second boss, the two sides of the back surface of the lower plastic are provided with the second boss, and the second boss is arranged opposite to the second groove.

[0012] Optionally, the first boss is arranged in the middle of the back surface of the lower plastic, the front surface of the lower plastic is provided with a third groove opposite to the first boss, and a plurality of air holes are arranged on the first boss.

[0013] Optionally, the cover plate is provided with an explosion-proof mounting hole corresponding to the third groove, and the explosion-proof mounting hole is used for mounting an explosion-proof valve and a protective patch.

[0014] Optionally, the distance between the first groove and the short side of the cover plate ranges from 3mm to L1-W2.

[0015] The width of the first groove ranges from 3mm to L1.

[0016] The length of the first groove ranges from L2 to W1-6mm.

[0017] The depth of the first groove ranges from H1 to 2mm.

[0018] L1 is the width of the second boss, L2 is the length of the first groove, L3 is the distance between the first groove and the short side of the cover plate, W1 is the length of the second boss, and W2 is the width of the first groove.

[0019] Optionally, the battery further comprises a top patch, the top patch is arranged on the top of the cover plate, and the top patch is provided with a first through hole opposite to the first groove.

[0020] In a second aspect, the utility model further provides a battery module, which comprises: a plurality of batteries of any one of the above, and the plurality of batteries are arranged in sequence according to the order of positive electrode corresponding to negative electrode.

[0021] An upper support is provided, a plurality of first positioning grooves are arranged on the upper support, a positioning protrusion is arranged in the first positioning groove, the positioning protrusion is arranged in cooperation with the first groove, and the positioning protrusions in adjacent first positioning grooves are arranged in opposite directions, so that the upper support is arranged in a clamped manner above the plurality of batteries.

[0022] Optionally, the battery module further comprises a lower support, the upper parts of the plurality of batteries are clamped to the upper support, and the lower parts of the plurality of batteries are clamped to the lower support.

[0023] A plurality of second positioning grooves are arranged on the lower support, and the plurality of first positioning grooves and the plurality of second positioning grooves are arranged in correspondence.

[0024] Optionally, the upper support is further provided with a matching hole corresponding to the two pole column assemblies and the explosion-proof valve.

[0025] The battery and the battery module provided by the embodiments of the present application have the following beneficial effects:

[0026] The battery provided by the embodiments of the present application has the following beneficial effects: the first groove is deep, on the one hand, the foolproof design is more obvious, and safety accidents caused by manual loading due to the unobvious foolproof design are avoided; on the other hand, the first groove is obvious and not easy to be misidentified, and the robot loading is not affected due to unclear or blocked impact marking; meanwhile, the cover plate strength is increased, and any function and internal space of the battery cell are not affected.

[0027] The battery module provided by the embodiments of the present application has the following beneficial effects: the first positioning groove provided with the positioning protrusion is arranged on the upper support, the positioning protrusions in the adjacent first positioning grooves are oppositely arranged, and a plurality of batteries arranged in the order of positive electrode corresponding to negative electrode can be normally buckled with the upper support, so that the arrangement order of the battery module can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0029] Figure 1 The structure schematic view of the cover plate and the lower plastic provided by the embodiments of the present application is shown in the figure;

[0030] Figure 2 The partial sectional view of the cover plate and the lower plastic provided by the embodiments of the present application is shown in the figure;

[0031] Figure 3 The top view of the cover plate and the lower plastic provided by the embodiments of the present application is shown in the figure;

[0032] Figure 4 The partial schematic view of the middle A is shown in the figure; Figure 3

[0033] Figure 5 The bottom view of the cover plate and the lower plastic provided by the embodiments of the present application is shown in the figure;

[0034] Figure 6 The exploded view of the battery provided by the embodiments of the present application is shown in the figure;

[0035] Figure 7 The structure schematic view of the battery provided by the embodiments of the present application is shown in the figure; ​

[0036] Figure 8 A structural schematic diagram of a battery module provided for the embodiment is shown in the figure;

[0037] Figure 9 An exploded view of a battery provided for the embodiment is shown in the figure;

[0038] Figure 10 A structural schematic diagram of an upper support provided for the embodiment is shown in the figure;

[0039] Figure 11 A partial sectional view of the cooperation between the battery and the upper support provided for the embodiment is shown in the figure.

[0040] Icon: 010-battery module; 011-battery; 012-cell; 013-housing; 014-blue film; 100-cover plate; 110-first groove; 120-protrusion; 130-short side; 140-first liquid injection hole; 150-explosion-proof mounting hole; 160-explosion-proof valve; 170-protection patch; 200-lower plastic; 210-first boss; 211-vent hole; 220-second boss; 230-second groove; 240-second liquid injection hole; 300-positive column assembly; 400-negative column assembly; 500-top patch; 510-first through hole; 600-upper support; 610-first positioning groove; 611-positioning protrusion; 620-cooperation hole; 700-lower support; 710-second positioning groove. DETAILED DESCRIPTION

[0041] The inventor found that when the cells 012 are assembled into a module, they are usually manually or robotically loaded. When manually loaded, the "+" and "-" marks are usually not designed to be large enough to be eye-catching, and long-time work leads to visual fatigue, so that the positive and negative poles are reversed, which is easy to cause short circuit when welded and connected, thus causing safety accidents. When robotically loaded, a vision system is used to identify "+" and "-" marks to distinguish between positive and negative poles. If the positive and negative poles are not clear or are covered, the normal identification is failed, thus leading to failure in grabbing.

[0042] To solve the above problems, the utility model provides a battery 011 and a battery module 010, which are provided with more obvious first grooves 110 for preventing mistakes and identification, so that the above problems can be improved.

[0043] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0045] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, it is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0047] In addition, if the terms "first", "second" and the like are used only to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.

[0049] The overall structure, working principle and technical effects of the battery 011 and the battery module 010 provided by the application will be described in detail below through embodiments and in conjunction with the drawings.

[0050] Please refer to Figure 1 The battery 011 provided by the application is applied to the new energy battery module 010.

[0051] Please refer to Figure 6 and Figure 7 In this embodiment, the battery 011 includes a cover plate 100, two pole assembly, a shell 013, a battery cell 012 and a blue film 014; the battery cell 012 is provided with two tabs, and the two tabs are respectively welded to the two pole assemblies; the cover plate 100 and the battery cell 012 are welded together, and the battery cell 012 and the battery 011 are assembled into the shell 013, and the shell 013 and the cover plate 100 are sealed and connected. Finally, the shell 013 is wrapped with the blue film 014.

[0052] Among them, the two tabs include a positive tab and a negative tab, the positive tab is connected with the positive pole assembly 300, and the negative tab is connected with the negative pole assembly 400.

[0053] Optionally, the battery 011 can be a square battery or a circular battery.

[0054] Please refer to Figure 1 The utility model provides a battery 011, include: two pole post subassembly, the cover plate 100, two pole post subassembly set up on the cover plate 100, the cover plate 100's front surface is equipped with first recess 110, and first recess 110 is set up opposite one of pole post subassembly, and first recess 110 is set up between one of pole post subassembly and the short side 130 of cover plate 100.

[0055] It can be understood that by setting the first recess 110, the first recess 110 is deep, on the one hand, the foolproof design is more obvious, and the safety accident caused by manual loading due to the unobvious foolproof design is avoided; on the other hand, the first recess 110 is obvious and not easy to identify errors, and the grabbing of the equipment is affected due to the unclear or blocked first recess 110 when the robot loads; at the same time, the strength of the cover plate 100 is increased, and any function and internal space of the battery cell 012 are not affected.

[0056] In this embodiment, the battery 011 includes a cover plate 100.

[0057] In this embodiment, the cover plate 100 is a rectangular plate structure, and the cover plate 100 accordingly has two oppositely arranged long sides and oppositely arranged short sides 130. Among them, the cover plate 100 is provided with two first pole post mounting holes, one of which is used to mount the positive pole post assembly 300, and the other is used to mount the negative pole post assembly 400.

[0058] In this embodiment, please refer to Figure 1 The cover plate 100 is provided with a first recess 110 on the front surface, and the first recess 110 is arranged opposite one of the pole post assemblies, and the first recess 110 is arranged between one of the pole post assemblies and the short side 130 of the cover plate 100. Among them, the first recess 110 is arranged along the extension direction of the short side 130 of the cover plate 100.

[0059] It can be understood that the first recess 110 has a certain depth as an identifier, and the foolproof design is obvious, and it is used to mark one of the pole post assemblies to distinguish the two pole post assemblies, so as to distinguish the positive and negative poles, avoid the safety accident caused by manual loading due to the unobvious foolproof design, or avoid the problem that the visual system is not easy to identify.

[0060] In the embodiment, the first groove 110 is arranged relative to the negative pole assembly 400 between the negative pole assembly 400 and the short side 130 of the cover plate 100; and a "+" mark is arranged between the positive pole assembly 300 and the short side 130 of the cover plate 100, so as to distinguish the two positive and negative poles. Of course, in other embodiments, the first groove 110 is arranged relative to the positive pole assembly 300 between the negative pole and the short side 130 of the cover plate 100; and a corresponding mark is arranged between the negative pole assembly 400 and the short side 130 of the cover plate 100, so as to distinguish the two positive and negative poles.

[0061] In the embodiment, please refer to Figure 2 The back of the cover plate 100 is provided with a protrusion 120 arranged relative to the first groove 110; wherein the first groove 110 extends downward along the cover plate 100 towards the protrusion 120. Such arrangement increases the strength of the cover plate 100; meanwhile, the protrusion 120 is arranged corresponding to the second groove 230 of the lower plastic 200, facilitating the assembly of the cover plate 100 and the lower plastic 200, and not affecting any function and internal space of the battery cell 012.

[0062] The protrusion 120 is a rectangular structure with a smooth edge.

[0063] In the embodiment, please refer to Figure 1 and Figure 3 The cover plate 100 is further provided with a first liquid injection hole 140 and an explosion-proof mounting hole 150; the explosion-proof mounting hole 150 is arranged at the middle position of the cover plate 100, and the explosion-proof mounting hole 150 is arranged corresponding to the installation of the explosion-proof valve 160 and the protection patch 170; wherein the first liquid injection hole 140 is arranged adjacent to the explosion-proof mounting hole 150, and the first liquid injection hole 140 is used for injecting electrolyte.

[0064] The cover plate 100 is further provided with a reserved area for spraying the supplier's mold number, GB / T code area and supplier's traceability code.

[0065] In the embodiment, the battery 011 further comprises a lower plastic 200.

[0066] The lower plastic 200 is arranged between the battery cell 012 and the cover plate 100, and the lower plastic 200 is made of plastic insulating material and plays an insulating role.

[0067] In the embodiment, please refer to Figure 1 and Figure 5 The lower plastic 200 is arranged at the bottom of the cover plate 100, and the lower plastic 200 is provided with two second pole mounting holes corresponding to the two first pole mounting holes, and the two pole assemblies are arranged on the cover plate 100 and the lower plastic 200 through the cooperation of the first pole mounting hole and the second pole mounting hole; the lower plastic 200 is further provided with a second liquid injection hole 240 corresponding to the first liquid injection hole 140, so that the electrolyte can be injected into the inside of the shell 013.

[0068] In the embodiment, please refer to Figure 2 , the front surface of the lower plastic 200 is provided with a second groove 230, and the convex 120 is matched and accommodated in the second groove 230. Among them, the second groove 230 is in an inverted trapezoidal structure, so that the convex 120 can be matched and accommodated in the second groove 230.

[0069] In the embodiment, please refer to Figure 3 , the back surface of the lower plastic 200 is provided with a first boss 210 and a second boss 220; the back surface of the lower plastic 200 is provided with a second boss 220 on both sides, and the second boss 220 is arranged opposite to the second groove 230.

[0070] Among them, please refer to Figure 3 , the first boss 210 is arranged in the middle of the back surface of the lower plastic 200, and the front surface of the lower plastic 200 is provided with a third groove opposite to the first boss 210, the third groove extends along the first boss 210, and a plurality of air holes 211 are arranged on the first boss 210.

[0071] In the embodiment, please refer to Figure 2 , the depth of the first groove 110 ranges from H1≤2mm.

[0072] In the embodiment, please refer to Figure 2 , Figure 4 and Figure 5 , the length of the first groove 110 ranges from L2≤W1-6mm; wherein L2 is the length of the first groove 110, and W1 is the length of the second boss 220. In this way, the length of the existing second boss 220 of the lower plastic 200 can be matched.

[0073] In the embodiment, please refer to Figure 2 , the width of the first groove 110 ranges from 3mm≤W2≤L1; wherein W2 is the width of the first groove 110, and L1 is the width of the second boss 220. In this way, the width of the existing second boss 220 of the lower plastic 200 can be matched.

[0074] In the embodiment, please refer to Figure 2 and Figure 4 , the distance between the first groove 110 and the short side 130 of the cover plate 100 ranges from 3mm≤L3≤L1-W2; wherein L3 is the distance between the first groove 110 and the edge of the short side 130 of the cover plate 100, L1 is the width of the second boss 220, and W2 is the width of the first groove 110.

[0075] The depth, length, width and distance from the short side 130 of the cover plate 100 of the first recess 110 are set so that the first recess 110 has a certain depth, and meanwhile can be designed in cooperation with the lower plastic 200, so as to realize the function of not affecting any function and the internal space of the battery cell 012.

[0076] In the embodiment, the battery 011 further comprises a top patch 500.

[0077] In the embodiment, please refer to Figure 1 The top patch 500 is arranged on the top of the cover plate 100, and the top patch 500 is provided with a first through hole 510 corresponding to the first recess 110.

[0078] It can be understood that the top patch 500 is attached to the front surface of the cover plate 100, and the cover plate 100 metal surface corresponding to the first through hole 510 has a height difference with the top patch 500 due to the sinking of the first recess 110, so that there is no risk of short circuit in the hollowed-out position; at the same time, the top patch 500 is convenient for hole cutting, and there is no problem of shielding the first recess 110.

[0079] The top patch 500 is further provided with a hole corresponding to the two pole assembly and the explosion-proof valve 160.

[0080] Corresponding to the above-mentioned battery 011, please refer to Figure 8 The utility model further provides a battery module 010, can guarantee the arrangement order of multiple battery modules 010.

[0081] Please refer to Figure 8 and Figure 9 The utility model provides a battery module 010, which comprises: a plurality of batteries 011 and an upper support 600, the plurality of batteries 011 are arranged in sequence according to the order of positive pole corresponding to negative pole;The upper support 600 is provided with a plurality of first positioning recesses 610, the first positioning recess 610 is provided with a positioning convex 611, the positioning convex 611 is arranged in cooperation with the first recess 110, and the positioning convex 611 in the adjacent first positioning recess 610 is arranged reversely, so that the upper support 600 is arranged reversely on the plurality of batteries 011.

[0082] It can be understood that the adjacent batteries 011 are arranged reversely, so that the plurality of batteries 011 are arranged in sequence according to the order of positive pole corresponding to negative pole;The first positioning recess 610 of the upper support 600 is provided with the positioning convex 611, and the positioning convex 611 in the adjacent first positioning recess 610 is arranged reversely, so that the plurality of batteries 011 arranged in sequence according to the order of positive pole corresponding to negative pole can be normally buckled with the upper support 600, and the arrangement can guarantee the arrangement order of the battery module 010.

[0083] In the embodiment, please refer to Figure 9 and Figure 10The battery module 010 comprises the upper support 600.

[0084] In the embodiment, the upper part of the plurality of battery modules 010 is buckled to the upper support 600. The upper support 600 is provided with a plurality of first positioning grooves 610. The first positioning grooves 610 are provided with positioning protrusions 611. The positioning protrusions 611 are arranged in the first grooves 110. The positioning protrusions 611 in the adjacent first positioning grooves 610 are arranged oppositely.

[0085] The height of the positioning protrusions 611 is lower than the depth of the first grooves 110.

[0086] In the embodiment, the upper support 600 is provided with a plurality of first positioning grooves 610. Figure 10 The positioning protrusions 611 in the adjacent first positioning grooves 610 are arranged oppositely. It can be understood that the positioning protrusion 611 in one of the first positioning grooves 610 is arranged at the first end of the first positioning groove 610. The positioning protrusion 611 in the adjacent first positioning groove 610 is arranged at the second end of the first positioning groove 610.

[0087] In the embodiment, the upper support 600 is further provided with a matching hole 620 corresponding to the two pole assembly and the explosion-proof valve 160.

[0088] In the embodiment, the battery module 010 comprises the lower support 700. Figure 8 Figure 9 In the embodiment, the lower part of the plurality of battery modules 010 is buckled to the lower support 700. The lower support 700 is provided with a plurality of second positioning grooves 710. The plurality of first positioning grooves 610 and the plurality of second positioning grooves 710 are arranged correspondingly.

[0089] Optionally, the first positioning grooves 610 and the second positioning grooves 710 can be two, three, four or the like. The first positioning grooves 610 and the second positioning grooves 710 are arranged correspondingly and have the same number.

[0090] In the embodiment, the battery module 010 comprises the lower support 700.

[0091] In the embodiment, the battery module 010 comprises the lower support 700. Figure 5 Figure 6 The installation process of the battery 011 and the battery module 010 is as follows.

[0092] ​​First step, assemble battery 011: first, the protrusion 120 of the cover plate 100 is installed in the second groove 230 of the lower plastic 200. Secondly, the positive column assembly 300 and the negative column assembly 400 are installed in the cover plate 100 and the lower plastic 200, the positive column assembly 300 is installed in the first pole mounting hole corresponding to the "+" mark, and the negative column assembly 400 is installed in the first pole mounting hole corresponding to the first groove 110 mark. Then, the positive pole of the battery cell 012 is welded to the positive column assembly 300, the negative pole of the battery cell 012 is welded to the negative column assembly 400, the battery cell 012 and the top cover assembly are assembled into the shell 013 and are sealed and connected. Finally, the shell 013 is wrapped with a blue film 014; at the same time, the top patch 500 is pasted on the front of the cover plate 100, and the first through hole 510 of the top patch 500 is pasted on the first groove 110.

[0093] Second step, assemble the battery module 010: a plurality of batteries 011 are sequentially arranged in the second positioning groove 710 of the lower support 700, wherein the positive pole of the battery 011 corresponds to the negative pole of the adjacent battery 011. Please refer to Figure 11 The positioning protrusion 611 in the first positioning groove 610 is matched with the first groove 110 of the battery 011, and the upper support 600 is normally buckled above the plurality of batteries 011; otherwise, the upper support 600 cannot be buckled above the plurality of batteries 011.

[0094] In summary, the battery 011 provided by the embodiment of the utility model, through setting first groove 110, first groove 110 depth is deeper, on the one hand, make the foolproof design more obvious, avoid artificial loading when foolproof design is not obvious, artificial installation error causes safety accident; on the other hand, first groove 110 is obvious and not easy to identify error, avoid robot loading when impact is not clear or shielding and affect the equipment of grabbing, at the same time, increase the strength of cover plate 100, do not affect any function and the internal space of battery cell 012.

[0095] Further, the depth, width, length and distance from the short side 130 of the cover plate 100 of the first groove 110 are designed according to the second boss 220 of the lower plastic 200, so that the first groove 110 does not affect any function and the internal space of the battery cell 012.

[0096] The battery module 010 provided by the embodiment of the utility model is arranged with the first positioning groove 610 provided with the positioning protrusion 611 on the upper support 600, and the positioning protrusions 611 in the adjacent first positioning grooves 610 are arranged oppositely, so that the plurality of batteries 011 arranged in sequence according to the positive pole corresponding to the negative pole can be normally buckled with the upper support 600, and the arrangement can ensure the arrangement order of the battery module 010.

[0097] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A battery, characterized in that, include: Two pole piece components; A cover plate, two of the pole post assemblies are disposed on the cover plate, and a first groove is provided on the front side of the cover plate. The first groove is disposed opposite to one of the pole post assemblies and is disposed between one of the pole post assemblies and the short side of the cover plate. The back of the cover plate is provided with a protrusion that is aligned with the first groove, and the protrusion is used for assembly with the lower plastic.

2. The battery according to claim 1, characterized in that, The two electrode assembly includes a positive electrode assembly and a negative electrode assembly, and the first groove is disposed relative to the negative electrode assembly; The first groove is provided along the short side of the cover plate.

3. The battery according to claim 2, characterized in that, The battery also includes the lower plastic, which is disposed at the bottom of the cover plate. The two terminal post assemblies are disposed on the cover plate and the lower plastic. A second groove is provided on the front side of the lower plastic, and the protrusion is fitted and accommodated in the second groove. The back of the lower plastic is provided with a first boss and a second boss, and the second boss is provided on both sides of the back of the lower plastic. The second boss is arranged opposite to the second groove.

4. The battery according to claim 3, characterized in that, The first protrusion is located in the middle of the back of the lower plastic, and the front of the lower plastic is provided with a third groove opposite to the first protrusion. The first protrusion is provided with a plurality of ventilation holes.

5. The battery according to claim 4, characterized in that, The cover plate is provided with an explosion-proof mounting hole corresponding to the third groove. The explosion-proof mounting hole is used to install an explosion-proof valve and a protective patch.

6. The battery according to claim 1, characterized in that, The distance between the first groove and the short side of the cover plate is in the range of: 3mm≤L3≤L1-W2; The width range of the first groove is: 3mm≤W2≤L1; The length range of the first groove is: L2≤W1-6mm; The depth range of the first groove is: H1≤2mm; Wherein, L1 is the width of the second boss, L2 is the length of the first groove, L3 is the distance of the first groove from the short side of the cover plate, W1 is the length of the second boss, and W2 is the width of the first groove.

7. The battery according to claim 1, characterized in that, The battery also includes a top patch, which is disposed on the top of the cover plate, and the top patch has a first through hole opposite to the first groove.

8. A battery module, characterized in that, include: The battery according to any one of claims 1-7, wherein the plurality of batteries are arranged in sequence in the order of positive electrode corresponding to negative electrode; The upper bracket has multiple first positioning grooves, and each first positioning groove has a positioning protrusion. The positioning protrusion is configured to cooperate with the first groove, and the positioning protrusions in adjacent first positioning grooves are configured oppositely, so that the upper bracket is fastened and positioned above the multiple batteries.

9. The battery module according to claim 8, characterized in that, The battery module also includes a lower bracket, with the upper bracket fastened to the top of the plurality of batteries and the lower bracket fastened to the bottom of the plurality of batteries; The lower support is provided with a plurality of second positioning grooves, and the plurality of first positioning grooves are provided corresponding to the plurality of second positioning grooves.

10. The battery module according to claim 8, characterized in that, The upper bracket is also provided with mating holes corresponding to the two pole post assemblies and the explosion-proof valve.

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