Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack, and belongs to the technical field of batteries, and the battery comprises a shell with an accommodating cavity; the cover body assembly comprises a cover plate, a first pole and a second pole; the electrode assembly is arranged in the accommodating cavity, and the electrode assembly comprises a battery cell body, a first tab and a second tab; the connecting assembly is arranged in the accommodating cavity, the connecting assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is electrically connected with the first pole and the first tab, and the second connecting piece is electrically connected with the second pole and the second tab; one of the first pole and the first connecting piece is provided with a first fool-proof part, the other one of the first pole and the first connecting piece is provided with a first groove for embedding the first fool-proof part, one of the second pole and the second connecting piece is provided with a second fool-proof part, and the other one of the second pole and the second connecting piece is provided with a second groove for embedding the second fool-proof part. Stable positioning of the first connecting piece and the second connecting piece before welding can be achieved, the first connecting piece and the second connecting piece can be conveniently and rapidly recognized, and the assembling accuracy and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery and a battery pack. BACKGROUND

[0002] At present, a connecting sheet is usually welded between the tab and the pole to realize the switching of the tab and the corresponding pole. However, before the connecting sheet is welded, the connecting sheet often has problems such as position skewing, which is easy to cause the interference between the connecting sheet and the tab after welding, and further cause the tearing of the tab, thereby affecting the electrical connection stability and safety of the battery. Meanwhile, the connecting sheet structures corresponding to the positive pole and the negative pole have high similarity, and the connecting sheets corresponding to the positive pole and the negative pole cannot be shared, so the reverse assembly problem is easy to occur in the assembly process, which also affects the battery assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving the above technical problems, and another purpose of the application is to provide a battery pack using the above battery.

[0004] TECHNICAL SCHEME: The battery provided by the embodiment of the application has a first direction, and comprises:

[0005] a shell having a receiving cavity and an opening communicating with the receiving cavity;

[0006] a cover assembly comprising a cover plate, a first pole and a second pole, the cover plate being arranged on the opening, and the first pole and the second pole being arranged in the cover plate in the first direction;

[0007] an electrode assembly arranged in the receiving cavity, the electrode assembly comprising an electrode core body, a first tab and a second tab, the first tab and the second tab being connected to one end of the electrode core body facing the cover plate;

[0008] a connecting assembly arranged in the receiving cavity, the connecting assembly comprising a first connecting piece and a second connecting piece, the first connecting piece being electrically connected to the first pole and the first tab, and the second connecting piece being electrically connected to the second pole and the second tab;

[0009] wherein one of the first pole and the first connecting piece is provided with a first foolproof part, and the other is provided with a first groove for embedding the first foolproof part, one of the second pole and the second connecting piece is provided with a second foolproof part, and the other is provided with a second groove for embedding the second foolproof part.

[0010] In some embodiments, the first fool-proof part and the first recess have a same shape in a projection view in a plane perpendicular to the first direction.

[0011] In some embodiments, the first fool-proof part and the second fool-proof part have a same shape in a projection view in a plane perpendicular to the first direction.

[0012] In some embodiments, the first fool-proof part and the second fool-proof part have a same shape in a projection view in a plane perpendicular to the first direction.

[0013] In some embodiments, the first fool-proof part and the second fool-proof part have a same shape in a projection view in a plane perpendicular to the first direction.

[0014] In some embodiments, the first fool-proof part and the second fool-proof part have a same shape in a projection view in a plane perpendicular to the first direction.

[0015] In some embodiments, the first fool-proof part is arranged on the first pole, and the first recess is arranged on the first connecting piece, the second fool-proof part is arranged on the second connecting piece, and the second recess is arranged on the second pole.

[0016] In some embodiments, the first fool-proof part is arranged on the first connecting piece, and the first recess is arranged on the first pole, the second fool-proof part is arranged on the second pole, and the second recess is arranged on the second connecting piece.

[0017] In some embodiments, the battery further has a second direction and a third direction, the first direction, the second direction and the third direction intersect with each other.

[0018] The first connecting member includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are arranged in the second direction, the first connecting part has a first side and a second side arranged oppositely in the second direction, the first connecting part has a third side and a fourth side arranged oppositely in the third direction, the second connecting part is connected to the second side, the first connecting part is electrically connected to the first pole column, the second connecting part is electrically connected to the first tab, the first recess is provided with a plurality of first recesses, and the plurality of first recesses are distributed on at least one of the first side, the third side and the fourth side and penetrate the side in the first direction.

[0019] And / or, the second connecting member includes a third connecting part and a fourth connecting part, the third connecting part and the fourth connecting part are arranged in the second direction, the third connecting part has a fifth side and a sixth side arranged oppositely in the second direction, the third connecting part has a seventh side and an eighth side arranged oppositely in the third direction, the fourth connecting part is connected to the sixth side, the third connecting part is electrically connected to the second pole column, the fourth connecting part is electrically connected to the second tab, the second recess is provided with a plurality of second recesses, and the plurality of second recesses are distributed on at least one of the fifth side, the seventh side and the eighth side and penetrate the side in the first direction.

[0020] In some embodiments, the battery also has a second direction intersecting the first direction;

[0021] The first connecting member includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are arranged in the second direction, the first connecting part is electrically connected to the first pole column, and the second connecting part is electrically connected to the first tab, in the first direction, the distance between the second connecting part and the cell body is a, the distance between the first connecting part and the cell body is b, and a > b is satisfied.

[0022] And / or, the second connecting member includes a third connecting part and a fourth connecting part, the third connecting part and the fourth connecting part are arranged in the second direction, the third connecting part is electrically connected to the second pole column, and the fourth connecting part is electrically connected to the second tab, in the first direction, the distance between the fourth connecting part and the cell body is c, the distance between the third connecting part and the cell body is d, and c > d is satisfied.

[0023] Correspondingly, the battery pack provided in the embodiments of the present application includes the battery described above.

[0024] Beneficial effects: a battery of an embodiment of the application comprises a shell, a cover assembly, an electrode assembly and a connecting assembly. The shell has a receiving cavity and an opening communicating with the receiving cavity; the cover assembly comprises a cover plate, a first pole and a second pole, the cover plate covers the opening, and the first pole and the second pole are respectively provided in the cover plate in a first direction; the electrode assembly is arranged in the receiving cavity, and comprises a battery core body, a first tab and a second tab, the first tab and the second tab are respectively connected to one end of the battery core body facing the cover plate; the connecting assembly is arranged in the receiving cavity, and comprises a first connecting piece and a second connecting piece, the first connecting piece is electrically connected to the first pole and the first tab, and the second connecting piece is electrically connected to the second pole and the second tab; one of the first pole and the first connecting piece is provided with a first foolproof part, and the other is provided with a first groove for embedding the first foolproof part; one of the second pole and the second connecting piece is provided with a second foolproof part, and the other is provided with a second groove for embedding the second foolproof part. On the one hand, the first foolproof part and the first groove, and the second foolproof part and the second groove are matched to realize stable positioning of the first connecting piece and the second connecting piece before welding, and meanwhile, the first foolproof part and the second foolproof part are beneficial to quick identification of the first connecting piece and the second connecting piece by an assembler, thereby improving assembly accuracy and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0026] Figure 1 is a structural schematic diagram of a battery of an embodiment of the application;

[0027] Figure 2 is an exploded structural schematic diagram of a battery of an embodiment of the application;

[0028] Figure 3 is a structural schematic diagram of a cover assembly of an embodiment of the application;

[0029] Figure 4 is a structural schematic diagram of a connecting assembly of an embodiment of the application;

[0030] Figure 5 is a structural schematic diagram of a cover assembly of an embodiment of the application along a first direction;

[0031] Figure 6 is Figure 5 is a sectional view along line A-A in

[0032] Figure 7 is an exploded structural schematic diagram of a cover assembly and a connecting assembly of another embodiment of the application;

[0033] Figure 8 This is a schematic diagram of the structure of a connection component according to another embodiment of this application;

[0034] Figure 9 This is a structural schematic diagram of the cover assembly and connecting assembly viewed from the first direction according to another embodiment of this application;

[0035] Figure 10 This is an exploded structural diagram of the cover assembly and connecting assembly according to another embodiment of this application;

[0036] Figure 11 This is a schematic diagram of the structure of a connection component according to another embodiment of this application;

[0037] Figure 12 This is a schematic diagram of the structure of a connection component according to another embodiment of this application;

[0038] Reference numerals: 1. Housing; 10. Receiving cavity; 11. Opening; 2. Cover assembly; 20. Cover plate; 21. First electrode post; 22. Second electrode post; 23. Insulator; 3. Electrode assembly; 30. Cell body; 31. First tab; 32. Second tab; 4. Connecting assembly; 40. First connector; 400. First connecting part; 4000. First side; 4001. Second side; 4002. Third side; 4003. Fourth side; 401. Second connecting part 4010, First sub-part; 4011, First gap; 41, Second connector; 410, Third connecting part; 4100, Fifth side; 4101, Sixth side; 4102, Seventh side; 4103, Eighth side; 411, Fourth connecting part; 4110, Second sub-part; 4111, Second gap; 5, First anti-mistake part; 6, Second anti-mistake part; 7, First groove; 8, Second groove; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0041] Currently, power batteries typically use connecting tabs welded between the tabs and terminals to facilitate the connection between them. However, before welding these connecting tabs, issues such as misalignment often arise, which can lead to interference between the welded connecting tabs and the tabs, potentially causing problems like tab tearing and affecting the electrical connection stability and safety of the battery.

[0042] In addition, the connecting plates corresponding to the positive and negative terminals have a high degree of similarity in structure, and there are situations where the connecting plates corresponding to the positive and negative terminals cannot be used interchangeably. Therefore, reverse installation problems are prone to occur during the assembly process, which also affects the battery assembly efficiency.

[0043] In view of this, refer to Figures 1 to 12 This application provides a battery designed to solve at least one of the aforementioned technical problems.

[0044] It should be noted that the following embodiments introduce a first direction X, a second direction Y, and a third direction Z that intersect each other pairwise. (Refer to...) Figure 1 The first direction X is roughly parallel to the height direction of the battery as a whole, the second direction Y is roughly parallel to the length direction of the battery as a whole, and the third direction Z is roughly parallel to the thickness direction of the battery as a whole.

[0045] Reference Figures 1 to 12 A battery includes a casing 1, a cover assembly 2, an electrode assembly 3, and a connection assembly 4.

[0046] The housing 1 has a receiving cavity 10 and an opening 11 communicating with the receiving cavity 10. The cover assembly 2 includes a cover plate 20, a first electrode post 21, and a second electrode post 22. The cover plate 20 covers the opening 11, and the first electrode post 21 and the second electrode post 22 are respectively inserted through the cover plate 20 in a first direction X. The electrode assembly 3 is disposed in the receiving cavity 10 and includes a cell body 30, a first electrode tab 31, and a second electrode tab 32. The first electrode tab 31 and the second electrode tab 32 are respectively connected to the end of the cell body 30 facing the cover plate 20. The connecting assembly 4 is disposed in the receiving cavity 10 and includes a first connector 40 and a second connector 41. The first connector 40 is electrically connected to the first electrode post 21 and the first electrode tab 31, and the second connector 41 is electrically connected to the second electrode post 22 and the second electrode tab 32.

[0047] One of the first pole post 21 and the first connector 40 is provided with a first anti-mistake part 5, and the other is provided with a first groove 7 for the first anti-mistake part 5 to be inserted. One of the second pole post 22 and the second connector 41 is provided with a second anti-mistake part 6, and the other is provided with a second groove 8 for the second anti-mistake part 6 to be inserted.

[0048] On the one hand, by employing the first anti-misalignment part 5 and the first groove 7, the second anti-misalignment part 6 and the second groove 8 in conjunction, the first connector 40 can quickly align with the first pole post 21, and the second connector 41 can quickly align with the second pole post 22, thereby achieving stable positioning of the first connector 40 and the second connector 41 before welding, improving welding stability, and reducing misalignment and interference problems between the first connector 40 and the first pole post 21, the second connector 41 and the second pole post 22. Simultaneously, the first anti-misalignment part 5 and the second anti-misalignment part 6 facilitate assembly personnel in quickly identifying the first connector 40 and the second connector 41, improving assembly accuracy and efficiency.

[0049] In some embodiments, refer to Figures 3 to 6 In a plane perpendicular to the first direction X, the orthographic projection shape of the first anti-mistake part 5 and the second anti-mistake part 6 are different. The first anti-mistake part 5 fits into the groove sidewall of the first groove 7, and the second anti-mistake part 6 fits into the groove sidewall of the second groove 8. In this embodiment, the first anti-mistake part 5 protrudes along the first direction X onto the first pole post 21, and the second anti-mistake part 6 protrudes along the second direction Y onto the second pole post 22. Although the shapes of the first anti-mistake part 5 and the second anti-mistake part 6 are similar, they are not the same, which facilitates quick identification of the first connector 40 where the first groove 7 is located and the second connector 41 where the second groove 8 is located.

[0050] Furthermore, it is understood that in other embodiments, taking the example of having one first anti-mistake part 5 and one second anti-mistake part 6, the orthographic projection shape of the first anti-mistake part 5 in a plane perpendicular to the first direction X can be a circle, polygon, curve, arc, irregular shape, ring, etc. Correspondingly, the orthographic projection shape of the second anti-mistake part 6 is different from that of the first anti-mistake part 5. The goal is to allow for quick fixation of the first connector 40 and the second connector 41, and to enable quick identification of the first connector 40 and the second connector 41. Similarly, when the number of the first anti-mistake part 5 and / or the second anti-mistake part 6 increases, the achieved positioning and anti-mistake effects are similar.

[0051] Specifically, in some embodiments, reference is made to Figures 3 to 6 The first connector 40 includes a first connecting portion 400 and a second connecting portion 401 connected to each other. The first connecting portion 400 and the second connecting portion 401 are arranged in the second direction Y. The first connecting portion 400 is electrically connected to the first electrode post 21, and the second connecting portion 401 is electrically connected to the first electrode tab 31. In the first direction X, the distance between the second connecting portion 401 and the battery cell body 30 is a, and the distance between the first connecting portion 400 and the battery cell body 30 is b, satisfying that a > b. The first connecting portion 400 and the second connecting portion 401 form a stepped structure in the second direction Y, that is, more space is reserved between the second connecting portion 401 and the first electrode tab 31, thereby meeting the space required for bending the first electrode tab 31. This helps to reduce the risk of the first electrode tab 31 being squeezed due to insufficient bending space, and the battery cell body 30 being inserted into it causing a short circuit.

[0052] Similarly, in some embodiments, reference is made to Figures 3 to 6 The second connector 41 includes a third connector 410 and a fourth connector 411 connected to each other. The third connector 410 and the fourth connector 411 are arranged in the second direction Y. The third connector 410 is electrically connected to the second electrode post 22, and the fourth connector 411 is electrically connected to the second electrode tab 32. In the first direction X, the distance between the fourth connector 411 and the battery cell body 30 is c, and the distance between the third connector 410 and the battery cell body 30 is d, satisfying that c > d. The third connector 410 and the fourth connector 411 form a stepped structure in the second direction Y, that is, more space is reserved between the fourth connector 411 and the second electrode tab 32, thereby meeting the space required for bending the second electrode tab 32. This helps to reduce the risk of the second electrode tab 32 being squeezed due to insufficient bending space, and short circuit caused by inserting the battery cell body 30.

[0053] In some embodiments, refer to Figures 2 to 4The electrode assembly 3 has multiple first tabs 31 arranged in a Z-direction along a third direction. The second connecting portion 401 includes multiple first sub-parts 4010 arranged in a Z-direction along a third direction, and each first sub-part 4010 is connected to at least one first tab 31. The electrode assembly 3 also has multiple second tabs 32 arranged in a Z-direction along a third direction. The fourth connecting portion 411 includes multiple second sub-parts 4110 arranged in a Z-direction along a third direction, and each second sub-part 4110 is connected to at least one second tab 32. It is understood that the electrode assembly 3 may include multiple cell bodies 30, each cell body 30 having one first tab 31 and one second tab 32. Alternatively, the electrode assembly 3 may include a single cell body 30, with multiple first tabs 31 and multiple second tabs 32. The presence of multiple first sub-parts 4010 facilitates multi-point welding of multiple first tabs 31, thereby improving the connection stability of the overall first connector 40 and the first tabs 31. Similarly, the presence of multiple second sub-parts 4110 facilitates multi-point welding of multiple second tabs 32, thereby improving the connection stability of the overall second connector 41 and the second tabs 32.

[0054] In some embodiments, refer to Figure 4 In the third direction Z, at least some adjacent first sub-parts 4010 are provided with a first gap 4011, which penetrates the second connecting part 401 in the second direction Y, away from the end of the first connecting part 400. In this embodiment, the second connecting part 401 includes two first sub-parts 4010, which correspond one-to-one with the two first tabs 31. By setting the first gap 4011, it is beneficial to reduce the mutual influence between adjacent first sub-parts 4010 and improve the deformation adaptability of the overall second connecting part 401.

[0055] In some embodiments, refer to Figure 4 In the third direction Z, at least some adjacent second sub-parts 4110 are provided with a second gap 4111, which penetrates the second connecting part 401 away from the first connecting part 400 in the second direction Y. In this embodiment, the fourth connecting part 411 includes two second sub-parts 4110, and the two second sub-parts 4110 correspond one-to-one with the two second tabs 32. By setting the second gap 4111, it is beneficial to reduce the mutual influence between adjacent second sub-parts 4110 and improve the deformation adaptability of the overall fourth connecting part 411.

[0056] Furthermore, based on the above battery structure, this application also demonstrates other modifications to the first anti-mistake part 5, the second anti-mistake part 6, the first groove 7, and the second groove 8:

[0057] In some embodiments, refer to Figures 7 to 9The first anti-mistake part 5 is provided in multiple ways, and the arrangement direction of the multiple first anti-mistake parts 5 intersects with the first direction X. The second anti-mistake part 6 is provided in multiple ways, and the arrangement direction of the multiple second anti-mistake parts 6 intersects with the first direction X. In the direction intersecting with the first direction X, the distance between at least two adjacent first anti-mistake parts 5 is D1, and the distance between two adjacent second anti-mistake parts 6 is D2, satisfying D1 > D2.

[0058] In some embodiments, refer to Figures 7 to 9 The first connecting portion 400 has a first side 4000 and a second side 4001 disposed opposite to each other in the second direction Y. The first connecting portion 400 also has a third side 4002 and a fourth side 4003 disposed opposite to each other in the third direction Z. The second connecting portion 401 is connected to the second side 4001. The first connecting portion 400 is electrically connected to the first pole post 21 and the second connecting portion 401 is electrically connected to the first pole tab 31. Multiple first grooves 7 are provided, and the multiple first grooves 7 are distributed on at least one of the first side 4000, the third side 4002, and the fourth side 4003, and penetrate along the first direction X to the side where they are located. (Refer to...) Figure 8 In this embodiment, the first side 4000, the third side 4002 and the fourth side 4003 are each provided with a first groove 7.

[0059] In some embodiments, refer to Figures 7 to 9 The third connecting portion 410 has a fifth side 4100 and a sixth side 4101 disposed opposite to each other in the second direction Y. The third connecting portion 410 also has a seventh side 4102 and an eighth side 4103 disposed opposite to each other in the third direction Z. The fourth connecting portion 411 connects to the sixth side 4101. The third connecting portion 410 is electrically connected to the second pole post 22. The fourth connecting portion 411 is electrically connected to the second pole lug 32. Multiple second grooves 8 are provided, and these multiple second grooves 8 are distributed on at least one of the fifth side 4100, the seventh side 4102, and the eighth side 4103, and penetrate along the first direction X to the side where they are located. (Refer to...) Figure 8 In this embodiment, the fifth side 4100, the seventh side 4102 and the eighth side 4103 are each provided with a second groove 8.

[0060] Correspondingly, the number of the first anti-mistake part 5 and the second anti-mistake part 6 can be the same or different. In this embodiment, three first anti-mistake parts 5 and three second anti-mistake parts 6 are used as an example. The three first anti-mistake parts 5 are arranged along the edge of the end face of the first pole post 21 facing the first connector 40, that is, the three first anti-mistake parts 5 correspond one-to-one with the three adjacent sides of the end face of the first pole post 21 facing the first connector 40. The three second anti-mistake parts 6 are arranged along the edge of the end face of the second pole post 22 facing the second connector 41, that is, the three second anti-mistake parts 6 correspond one-to-one with the three adjacent sides of the end face of the second pole post 22 facing the second connector 41. Refer to Figure 9As shown, taking adjacent first anti-mistake parts 5 and second anti-mistake parts 6 in the second direction Y as an example, the distance between one first anti-mistake part 5 and its adjacent first anti-mistake part 5 is greater than the distance between two adjacent second anti-mistake parts 6, thereby achieving visual anti-mistake as well as structural anti-mistake. Similarly, as the number of first anti-mistake parts 5 and second anti-mistake parts 6 increases or decreases, the above-mentioned positioning and anti-mistake effects can also be achieved.

[0061] By distributing the first groove 7 around the edge of the first connecting part 400, the second groove 8 around the edge of the third connecting part 410, the first anti-mistake part 5 around the edge of the first pole post 21, and the second anti-mistake part 6 around the edge of the second pole post 22, the welding positions of the first pole post 21 and the first connecting part 400, as well as the welding positions of the second pole post 22 and the third connecting part 410, can be avoided.

[0062] In some embodiments, refer to Figures 7 to 9 It is understandable that, based on different arrangement structures, the orthographic projection shape of the first anti-mistake part 5 can be the same as the orthographic projection shape of the second anti-mistake part 6 in a plane perpendicular to the first direction X.

[0063] In some embodiments, refer to Figure 10 and Figure 11 The number of the first anti-mistake parts 5 and the number of the second anti-mistake parts 6 are different. The number of the first grooves 7 is the same as the number of the first anti-mistake parts 5 and corresponds one-to-one. The number of the second grooves 8 is the same as the number of the second anti-mistake parts 6 and corresponds one-to-one. It is understood that, based on the difference in quantity, in a plane perpendicular to the first direction X, the orthographic projection shape of the first anti-mistake part 5 can be the same as or different from the orthographic projection shape of the second anti-mistake part 6. Similarly, the spacing between the first anti-mistake parts 5 and the second anti-mistake parts 6 can also be the same or different. In this embodiment, as shown... Figure 10 and Figure 11 In the embodiment shown, the number of first anti-mistake parts 5 is less than the number of second anti-mistake parts 6. The arrangement of the multiple first anti-mistake parts 5 and the multiple second anti-mistake parts 6, as well as their projection shapes in the plane perpendicular to the first direction X, are different and will not be described in detail here.

[0064] Furthermore, in order to achieve the positioning and foolproofing of the first connector 40 and the second connector 41, in some embodiments, reference is made to... Figure 12 In a plane perpendicular to the first direction X, the orthographic projection shape of the first anti-mistake part 5 and the second anti-mistake part 6 are the same, but the dimensions of the first anti-mistake part 5 and the second anti-mistake part 6 intersecting in the first direction X are different. For example, in a plane perpendicular to the first direction X, the orthographic projection shape of the first anti-mistake part 5 and the second anti-mistake part 6 are both circular, but the radial dimensions of the two circles are different, corresponding to different first grooves 7 and second grooves 8, which can also achieve positioning and anti-mistake.

[0065] Furthermore, to achieve positioning and error prevention for the first connector 40 and the second connector 41, in some embodiments, the first error-prevention part 5 is disposed on the first pole post 21, the first groove 7 is disposed on the first connector 40, the second error-prevention part 6 is disposed on the second connector 41, and the second groove 8 is disposed on the second pole post 22. Alternatively, the first error-prevention part 5 is disposed on the first connector 40, the first groove 7 is disposed on the first pole post 21, the second error-prevention part 6 is disposed on the second pole post 22, and the second groove 8 is disposed on the second connector 41. That is, one of the first connector 40 and the second connector 41 corresponds to the error-prevention part, and the other corresponds to the groove, thereby achieving error prevention and positioning effects, which will not be elaborated further here.

[0066] Accordingly, this application provides a battery pack including the aforementioned battery. This battery pack can be applied to electronic devices, energy storage devices, electric vehicles, and other equipment. It is understood that this battery pack can possess all the technical features and corresponding beneficial effects of the aforementioned battery, which will not be elaborated upon here.

[0067] The present application provides a detailed description of a battery and battery pack, and uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of the present application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that, The battery has a first orientation, and the battery includes: The housing has a receiving cavity and an opening communicating with the receiving cavity; A cover assembly includes a cover plate, a first pole post, and a second pole post. The cover plate covers the opening, and the first pole post and the second pole post are respectively inserted through the cover plate in the first direction. An electrode assembly is disposed in the receiving cavity. The electrode assembly includes a battery cell body, a first electrode tab, and a second electrode tab. The first electrode tab and the second electrode tab are respectively connected to one end of the battery cell body facing the cover plate. A connecting assembly is disposed in the receiving cavity. The connecting assembly includes a first connector and a second connector. The first connector is electrically connected to the first electrode post and the first electrode tab, and the second connector is electrically connected to the second electrode post and the second electrode tab. Wherein, one of the first pole post and the first connector is provided with a first anti-fooling part, and the other is provided with a first groove for the first anti-fooling part to be inserted; one of the second pole post and the second connector is provided with a second anti-fooling part, and the other is provided with a second groove for the second anti-fooling part to be inserted.

2. The battery according to claim 1, characterized in that, In a plane perpendicular to the first direction, the orthographic projection shape of the first anti-mistake part is different from that of the second anti-mistake part. The first anti-mistake part is in contact with the groove sidewall of the first groove, and the second anti-mistake part is in contact with the groove sidewall of the second groove.

3. The battery according to claim 1, characterized in that, The number of the first error-proof part and the number of the second error-proof part are different. The number of the first groove and the number of the first error-proof part are the same and correspond one-to-one. The number of the second groove and the number of the second error-proof part are the same and correspond one-to-one.

4. The battery according to claim 1 or 3, characterized in that, The first error prevention part is provided in multiple ways, and the arrangement direction of the multiple first error prevention parts intersects with the first direction. The second error prevention part is provided in multiple ways, and the arrangement direction of the multiple second error prevention parts intersects with the first direction. In the direction intersecting with the first direction, the distance between at least two adjacent first error prevention parts is D1, and the distance between two adjacent second error prevention parts is D2, satisfying D1 > D2.

5. The battery according to claim 4, characterized in that, In a plane perpendicular to the first direction, the orthographic projection shape of the first error-proof part is the same as the orthographic projection shape of the second error-proof part.

6. The battery according to claim 1, characterized in that, In a plane perpendicular to the first direction, the orthographic projection shape of the first error-proof part and the orthographic projection shape of the second error-proof part are the same, but the dimensions of the first error-proof part and the second error-proof part are different when they intersect the first direction.

7. The battery according to claim 1, characterized in that, The first anti-fooling part is disposed on the first pole post, and the first groove is disposed on the first connector; the second anti-fooling part is disposed on the second connector, and the second groove is disposed on the second pole post. Alternatively, the first anti-mistake part is disposed on the first connector, and the first groove is disposed on the first pole post, the second anti-mistake part is disposed on the second pole post, and the second groove is disposed on the second connector.

8. The battery according to claim 4, characterized in that, The battery also has a second direction and a third direction, wherein the first direction, the second direction and the third direction intersect each other; The first connector includes a first connecting portion and a second connecting portion, which are arranged in the second direction. The first connecting portion has a first side and a second side that are oppositely arranged in the second direction. The first connecting portion has a third side and a fourth side that are oppositely arranged in the third direction. The second connecting portion is connected to the second side. The first connecting portion is electrically connected to the first pole post. The second connecting portion is electrically connected to the first pole tab. The first groove is provided in a plurality of places. The plurality of first grooves are distributed on at least one of the first side, the third side and the fourth side and penetrate through the side along the first direction. And / or, the second connector includes a third connecting portion and a fourth connecting portion, the third connecting portion and the fourth connecting portion being arranged in the second direction, the third connecting portion having a fifth side and a sixth side disposed opposite to each other in the second direction, the third connecting portion having a seventh side and an eighth side disposed opposite to each other in the third direction, the fourth connecting portion being connected to the sixth side, the third connecting portion being electrically connected to the second pole post, the fourth connecting portion being electrically connected to the second pole tab, and the second groove being provided in a plurality of them, the plurality of second grooves being distributed on at least one of the fifth side, the seventh side and the eighth side and penetrating the side along the first direction.

9. The battery according to claim 1, characterized in that, The battery also has a second direction intersecting the first direction; The first connector includes a first connecting part and a second connecting part connected to each other. The first connecting part and the second connecting part are arranged in the second direction. The first connecting part is electrically connected to the first electrode post, and the second connecting part is electrically connected to the first electrode tab. In the first direction, the distance between the second connecting part and the battery cell body is a, and the distance between the first connecting part and the battery cell body is b, satisfying: a > b. And / or, the second connector includes a third connecting portion and a fourth connecting portion connected to each other, the third connecting portion and the fourth connecting portion being arranged in the second direction, the third connecting portion being electrically connected to the second pole post, and the fourth connecting portion being electrically connected to the second pole tab. In the first direction, the distance between the fourth connecting portion and the cell body is c, and the distance between the third connecting portion and the cell body is d, satisfying: c > d.

10. A battery pack, characterized in that, Includes the battery as described in any one of claims 1 to 9.

Images