Battery cell structure and battery

Abstract

The utility model discloses a battery cell structure and a battery, and belongs to the technical field of batteries. The battery cell structure comprises a first switching piece, a second switching piece and at least one battery cell single body, the battery cell single body comprises a pole piece body, at least two positive tab groups and at least two negative tab groups, the positive tab groups and the negative tab groups are formed on the pole piece body, each positive tab group comprises a plurality of stacked positive tabs, and each negative tab group comprises a plurality of stacked negative tabs; each positive tab group is connected to the first adapter sheet; and each negative tab group is connected to the second adapter sheet. The internal resistance of the battery cell structure can be reduced, so that the fast charging capability of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cell structure and a battery. Background Technology

[0002] A secondary battery, also known as a rechargeable battery or accumulator, is a type of battery that can be reused after being discharged by recharging to reactivate the active materials. Traditional secondary batteries are typically formed by winding or stacking. In both structures, the positive (and negative) electrode includes multiple tabs, which are laminated onto an adapter plate for simultaneous charging and discharging. More tabs mean more current paths, increasing fast-charging performance. However, increasing the number of tab layers also increases the thickness of the welded tabs, occupying more space and reducing battery energy density. Furthermore, an increased number of welded layers often leads to increased internal resistance of the tabs, limiting the improvement of fast-charging capabilities.

[0003] Therefore, there is an urgent need for a cell structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a cell structure and battery that can increase the current path, reduce the internal resistance of the cell structure, and thus improve the fast charging capability of the battery.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery cell structure, comprising:

[0007] At least one battery cell, the battery cell comprising an electrode body and at least two sets of positive tabs and at least two sets of negative tabs formed on the electrode body, each set of positive tabs comprising a plurality of stacked positive tabs, and each set of negative tabs comprising a plurality of stacked negative tabs.

[0008] The first adapter plate, and each group of positive electrode tabs is connected to the first adapter plate;

[0009] The second adapter plate is connected to each of the negative electrode groups.

[0010] As a preferred embodiment of the battery cell structure provided by this utility model, the projections of each group of positive electrode tabs on the first adapter plate do not completely overlap; and / or the projections of each group of negative electrode tabs on the second adapter plate do not completely overlap.

[0011] As a preferred embodiment of the battery cell structure provided by this utility model, the positive electrode groups are arranged at intervals; and / or the negative electrode groups are arranged at intervals.

[0012] As a preferred embodiment of the battery cell structure provided by this utility model, each group of positive electrode tabs is connected to the same side or different sides of the first adapter plate; and / or, each group of negative electrode tabs is connected to the same side or different sides of the second adapter plate.

[0013] As a preferred embodiment of the battery cell structure provided by this utility model, the battery cell unit is a wound core unit or a stacked unit.

[0014] As a preferred embodiment of the battery cell structure provided by this utility model, the number of winding turns of the core unit is M, the number of positive tabs per winding turn is a, and the number of negative tabs is a. The number of positive tabs in each group of positive tabs is a*M / b, and the number of negative tabs in each group of negative tabs is a*M / c. Wherein, a, b, and c are positive integers, and b≥2, c≥2, b is the number of groups of positive tabs, and c is the number of groups of negative tabs; b and c may be equal or unequal.

[0015] As a preferred embodiment of the battery cell structure provided by this utility model, the number of stacked layers of the laminated unit is N, the number of positive tabs in each stacked layer is d or the number of negative tabs in each stacked layer is e, the number of positive tabs in each group of positive tabs is d*N / f, and the number of negative tabs in each group of negative tabs is e*N / g; wherein d, e, f, and g are positive integers, f≥2, g≥2, f is the number of groups of positive tabs, g is the number of groups of negative tabs, and d and e are equal or unequal, and f and g are equal or unequal.

[0016] As a preferred embodiment of the battery cell structure provided by this utility model, a portion of the positive tabs of each of the positive tab groups are connected to one side of the first adapter plate, and the remaining portion of the positive tabs are connected to the other side of the first adapter plate; and / or a portion of the negative tabs of each of the negative tab groups are connected to one side of the second adapter plate, and the remaining portion of the negative tabs are connected to the other side of the second adapter plate.

[0017] As a preferred embodiment of the battery cell structure provided by this utility model, the distance between adjacent positive electrode groups and negative electrode groups is L1, the distance between two adjacent positive electrode groups is L2, and the distance between two adjacent negative electrode groups is L3.

[0018] Where: L1>L2=L3.

[0019] This utility model also provides a battery, including a casing and a cell structure as described above, wherein the cell structure is disposed in the casing.

[0020] The beneficial effects of this utility model are as follows:

[0021] The battery cell structure provided by this utility model includes at least one battery cell, a first adapter plate, and a second adapter plate. The battery cell includes an electrode body and at least two sets of positive tabs and at least two sets of negative tabs formed on the electrode body. Each set of positive tabs includes multiple stacked positive tabs, and each set of negative tabs includes multiple stacked negative tabs. Each set of positive tabs is connected to the first adapter plate, and each set of negative tabs is connected to the second adapter plate. Compared to the prior art where all positive tabs and all negative tabs of each battery cell are welded together in groups, this utility model divides all positive tabs and all negative tabs of the battery cell into multiple groups, and each set of positive tabs is welded to the first adapter plate, and each set of negative tabs is welded to the second adapter plate. This reduces the internal resistance of the battery cell structure, thereby improving the battery's fast-charging capability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a front view of a single battery cell provided in Embodiment 1 of this utility model;

[0024] Figure 2 This is a top view of a single battery cell provided in Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of a single battery cell connected to a first adapter piece and a second adapter piece according to Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the battery cell connected to the first adapter piece and the second adapter piece according to Embodiment 2 of this utility model;

[0027] Figure 5 This is a schematic diagram of the first structure of the battery cell connected to the first adapter piece and the second adapter piece according to Embodiment 3 of this utility model;

[0028] Figure 6 This is a schematic diagram of the second structure provided in Embodiment 3 of this utility model, showing the connection between a single battery cell and the first and second adapter pieces;

[0029] Figure 7 This is a schematic diagram of the battery cell structure provided in Embodiment 3 of this utility model;

[0030] Figure 8This is a schematic diagram of the structure of the battery cell connected to the first adapter piece and the second adapter piece according to Embodiment 4 of this utility model.

[0031] Figure label:

[0032] 100. Single cell; 110. Electrode body; 120. Positive tab assembly; 130. Negative tab assembly; 200. First adapter piece; 300. Second adapter piece. Detailed Implementation

[0033] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0034] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0035] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0036] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0037] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0038] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0039] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0040] Example 1

[0041] Figure 1 A front view of the battery cell 100 provided in this embodiment is shown. Figure 2 A top view of the battery cell 100 provided in this embodiment is shown. Figure 3 This diagram illustrates the structure of the battery cell 100 provided in this embodiment when connected to the first adapter plate 200 and the second adapter plate 300. Figures 1-3As shown, this embodiment provides a battery cell structure, which includes a first adapter plate 200, a second adapter plate 300, and at least one battery cell unit 100. The battery cell unit 100 includes an electrode body 110 and at least two sets of positive electrode tabs 120 and at least two sets of negative electrode tabs 130 formed on the electrode body 110. Each set of positive electrode tabs 120 includes multiple stacked positive electrode tabs, and each set of negative electrode tabs 130 includes multiple stacked negative electrode tabs. Each set of positive electrode tabs 120 is connected to the first adapter plate 200, and each set of negative electrode tabs 130 is connected to the second adapter plate 300. Compared to the existing technology where all positive tabs and all negative tabs of each battery cell are welded in groups, this embodiment divides all positive tabs and all negative tabs of the battery cell into multiple groups, and each group of positive tabs 120 is welded to the first adapter piece 200, and each group of negative tabs 130 is welded to the second adapter piece 300. This reduces the internal resistance of the battery cell structure and improves the fast charging capability of the battery.

[0042] In this embodiment, the battery cell 100 is a wound core cell. Specifically, the number of turns of the wound core cell is M, the number of positive tabs per turn of the wound core is a, the number of negative tabs is a, the number of positive tabs in each positive tab group 120 is a*M / b, and the number of negative tabs in each negative tab group 130 is a*M / c, where a, b, and c are positive integers, and b≥2, c≥2, b is the number of positive tab groups 120, and c is the number of negative tab groups 130; b and c may be equal or unequal.

[0043] In this embodiment, the number of positive and negative tabs per turn of the core is 2, i.e., a = 2. This reduces the number of positive and negative tabs while ensuring the battery's fast charging capability, thus facilitating manufacturing and reducing material costs to some extent. Of course, in other embodiments, designers can adjust the specific value of a according to actual use and processing requirements; it can be any value of 3, 4, 5, or higher.

[0044] Optionally, such as Figure 3 As shown, when the positive tab group 120 is connected to the first adapter plate 200 and the negative tab group 130 is connected to the second adapter plate 300, the projections of each positive tab group 120 on the first adapter plate 200 do not completely overlap; the projections of each negative tab group 130 on the second adapter plate 300 do not completely overlap. This design can reduce the welding thickness between the positive tab group 120 and the first adapter plate 200 and between the negative tab group 130 and the second adapter plate 300, thereby increasing the energy density of the battery.

[0045] Optionally, the positive electrode tabs 120 are arranged at intervals; the negative electrode tabs 130 are arranged at intervals. That is, the projections of each positive electrode tab 120 on the first adapter plate 200 do not overlap, and the projections of each negative electrode tab 130 on the second adapter plate 300 do not overlap, so as to further reduce the welding thickness between the positive electrode tab 120 and the first adapter plate 200 and between the negative electrode tab 130 and the second adapter plate 300.

[0046] In this embodiment, b and c are preferably equal, and the spacing between two adjacent positive electrode groups 120 is equal; the spacing between two adjacent negative electrode groups 130 is equal. This design, while ensuring a small welding thickness, can improve the uniformity of the electrode distribution, thereby making the current distribution inside the cell structure more uniform. On the other hand, it can reduce the risk of local overheating of the cell structure, thus ensuring its safety during use.

[0047] like Figure 3 As shown, in this embodiment, each group of positive electrode tabs 120 is connected to different sides of the first adapter plate 200; each group of negative electrode tabs 130 is connected to different sides of the second adapter plate 300. This design reduces the welding thickness between the positive electrode tabs 120 and the first adapter plate 200, and between the negative electrode tabs 130 and the second adapter plate 300. Furthermore, it allows for cross-connection structures between the positive electrode tabs 120 and the first adapter plate 200, and between the negative electrode tabs 130 and the second adapter plate 300, thereby improving the structural stability of the battery cell structure.

[0048] In one example, when the number of positive tab groups 120 is 2, one group of positive tab groups 120 is connected to one side of the first adapter plate 200, and the other group of positive tab groups 120 is connected to the other side of the first adapter plate 200; when the number of negative tab groups 130 is 2, one group of negative tab groups 130 is connected to one side of the second adapter plate 300, and the other group of negative tab groups 130 is connected to the other side of the second adapter plate 300. In another example, when the number of positive tab groups 120 is 3, one group of positive tab groups 120 is connected to one side of the first adapter plate 200, and the other two groups of positive tab groups 120 are connected to the other side of the first adapter plate 200. The two positive tab groups 120 connected to the same side of the first adapter plate 200 can be arranged adjacently or separately on both sides of the other group of positive tab groups 120. When the number of negative tab groups 130 is 3, one group of negative tab groups 130 is connected to one side of the second adapter plate 300, and the other group of negative tab groups 130 is connected to the other side of the second adapter plate 300. The two negative tab groups 130 connected to the same side of the second adapter plate 300 can be arranged adjacently or separately on both sides of the other group of negative tab groups 130.

[0049] Optionally, the positive electrode lug 120 is connected to the first adapter piece 200 by ultrasonic welding. Ultrasonic welding has the advantages of high welding efficiency and good welding quality.

[0050] like Figure 2 As shown, the distance between adjacent positive tab groups 120 and negative tab groups 130 is L1, the distance between two adjacent positive tab groups 120 is L2, and the distance between two adjacent negative tab groups 130 is L3; where L1 > L2 = L3. This design facilitates the connection of multiple positive tab groups 120 to the same first adapter plate 200 and multiple negative tab groups 130 to the same second adapter plate 300, while preventing short circuits caused by contact between the first adapter plate 200 and the second adapter plate 300 due to an insufficient L1, thereby further ensuring the safety of the battery cell structure.

[0051] Example 2

[0052] This embodiment provides a battery cell structure, which is roughly the same as the battery cell structure in Embodiment 1. The main difference is that the connection method between the positive electrode group 120 and the first adapter piece 200 and the connection method between the negative electrode group 130 and the second adapter piece 300 are different from those in Embodiment 1.

[0053] Figure 4 This diagram illustrates the structure of the battery cell 100 connected to the first adapter plate 200 and the second adapter plate 300 according to this embodiment. Figure 4 As shown, each group of positive electrode tabs 120 is connected to the same side of the first adapter plate 200; each group of negative electrode tabs 130 is connected to the same side of the second adapter plate 300. Compared with Embodiment 1, this arrangement can improve the convenience of the connection process between each group of positive electrode tabs 120 and the first adapter plate 200, and between each group of negative electrode tabs 130 and the second adapter plate 300. That is, the welding equipment can perform welding on the same side of the first adapter plate 200 or the second adapter plate 300, resulting in higher welding efficiency.

[0054] Example 3

[0055] This embodiment provides a battery cell structure, which is roughly the same as the battery cell structure in Embodiment 1, except that the number of individual battery cell 100 is different.

[0056] Figure 5 This diagram illustrates the first structural schematic of the connection between the battery cell 100 provided in this embodiment and the first adapter piece 200 and the second adapter piece 300. Figure 6 This diagram illustrates a second structure in which the battery cell 100 provided in this embodiment is connected to the first adapter piece 200 and the second adapter piece 300. Figure 7A schematic diagram of the cell structure provided in this embodiment is shown. Figures 5-7 As shown, in this embodiment, the battery cell 100 is a wound cell, and they are arranged in pairs, i.e., the number of wound cells is two, four, six, etc. All positive tabs 120 on the two paired wound cells are connected to the same first adapter plate 200, and all negative tabs 130 on the two paired wound cells are connected to the same second adapter plate 300. This design can increase the number of wound cells, thereby improving the battery's charging capacity.

[0057] The following is combined Figures 5-7 Briefly describe the assembly process of this battery cell structure:

[0058] 1) A positive electrode sheet with a positive tab, a diaphragm, and a negative electrode sheet with a negative tab are wound together to form a core unit;

[0059] 2) Place the two core units opposite each other, and connect all the positive tabs 120 to the same first adapter plate 200, and connect all the negative tabs 130 to the same second adapter plate 300.

[0060] 3) Fold the two oppositely placed core units in half so that the outer surfaces of the two core units are attached to each other, thereby forming a cell structure.

[0061] It should be noted that when the positive electrode group 120 is connected to the first adapter piece 200, each positive electrode group 120 can be connected to the same side of the first adapter piece 200, or some positive electrode groups 120 can be connected to one side of the first adapter piece 200 and the other part of the positive electrode groups 120 can be connected to the other side of the first adapter piece 200; similarly, when the negative electrode group 130 is connected to the second adapter piece 300, each negative electrode group 130 can be connected to the same side of the second adapter piece 300, or some negative electrode groups 130 can be connected to one side of the second adapter piece 300 and the other part of the negative electrode groups 130 can be connected to the other side of the second adapter piece 300.

[0062] Example 4

[0063] This embodiment provides a battery cell structure, which is roughly the same as the battery cell structure in Embodiment 1. The main difference is that the connection method between the positive electrode group 120 and the first adapter piece 200 and the connection method between the negative electrode group 130 and the second adapter piece 300 are different from those in Embodiment 1.

[0064] Figure 8 This diagram illustrates the structure of the battery cell 100 connected to the first adapter plate 200 and the second adapter plate 300 according to this embodiment. Figure 8As shown, in this embodiment, some positive tabs of each positive tab group 120 are connected to one side of the first adapter piece 200, and the remaining positive tabs are connected to the other side of the first adapter piece 200; some negative tabs of each negative tab group 130 are connected to one side of the second adapter piece 300, and the remaining negative tabs are connected to the other side of the second adapter piece 300. That is, each positive tab group 120 is divided into two parts along its thickness direction, and the first adapter piece 200 is inserted between these two parts of the positive tabs, with one part of the positive tabs connected to one side of the first adapter piece 200 and the other part connected to the other side of the first adapter piece 200; each negative tab group 130 is divided into two parts along its thickness direction, and the second adapter piece 300 is inserted between these two parts of the negative tabs, with one part of the negative tabs connected to one side of the second adapter piece 300 and the other part connected to the other side of the second adapter piece 300. This arrangement can further reduce the welding thickness, thereby increasing the energy density of the battery.

[0065] Example 5

[0066] This embodiment provides a battery cell structure, which is roughly the same as the battery cell structure in Embodiment 1. The main difference is that the molding process of the battery cell 100 is different.

[0067] In this embodiment, the battery cell 100 is a laminated cell. Specifically, the number of laminated layers in the laminated cell is N, the number of positive tabs in each laminated layer is d or the number of negative tabs in each laminated layer is e, the number of positive tabs in each positive tab group 120 is d*N / f, and the number of negative tabs in each negative tab group 130 is e*N / g; where d, e, f, and g are positive integers, f≥2, g≥2, f is the number of positive tab groups 120, g is the number of negative tab groups 130, and d and e are equal or unequal, and f and g are equal or unequal.

[0068] This embodiment does not limit the connection method between the positive electrode assembly 120 and the first adapter piece 200, or the connection method between the negative electrode assembly 130 and the second adapter piece 300. Designers can refer to Embodiment 1, Embodiment 2, Embodiment 3 or Embodiment 4 to select any connection method between the positive electrode assembly 120 and the first adapter piece 200, or the connection method between the negative electrode assembly 130 and the second adapter piece 300.

[0069] Example 6

[0070] This embodiment also provides a battery, which includes a casing and the aforementioned cell structure. By applying the cell structure, the current path can be increased and the internal resistance of the cell structure can be reduced, thereby improving the battery's fast-charging capability. The cell structure can be any one of the cell structures described in Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, or Embodiment 5.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A battery cell structure, characterized in that, include: At least one battery cell (100), the battery cell (100) includes an electrode body (110) and at least two sets of positive tabs (120) and at least two sets of negative tabs (130) formed on the electrode body (110), each set of positive tabs (120) includes a plurality of stacked positive tabs, and each set of negative tabs (130) includes a plurality of stacked negative tabs; The first adapter plate (200) is connected to each of the positive electrode tab groups (120). The second adapter plate (300) is connected to each of the negative electrode tabs (130).

2. The cell structure according to claim 1, characterized in that, The projections of each positive tab group (120) onto the first adapter plate (200) do not completely overlap; and / or the projections of each negative tab group (130) onto the second adapter plate (300) do not completely overlap.

3. The cell structure according to claim 1, characterized in that, The positive electrode tabs (120) of each group are arranged at intervals; and / or the negative electrode tabs (130) of each group are arranged at intervals.

4. The cell structure according to claim 1, characterized in that, Each of the positive electrode tabs (120) is connected to the same side or different sides of the first adapter plate (200); and / or, each of the negative electrode tabs (130) is connected to the same side or different sides of the second adapter plate (300).

5. The cell structure according to claim 1, characterized in that, The battery cell (100) is a wound cell or a laminated cell.

6. The cell structure according to claim 5, characterized in that, The number of turns of the core unit is M, the number of positive tabs per turn of the core is a, and the number of negative tabs is a. The number of positive tabs in each group of positive tabs (120) is a*M / b, and the number of negative tabs in each group of negative tabs (130) is a*M / c. Wherein, a, b, and c are positive integers, and b≥2, c≥2, b is the number of groups of positive tabs (120), and c is the number of groups of negative tabs (130); b and c may be equal or unequal.

7. The cell structure according to claim 5, characterized in that, The number of stacked layers of the stacked unit is N, the number of positive tabs in each stacked layer is d or the number of negative tabs in each stacked layer is e, the number of positive tabs in each group of positive tabs (120) is d*N / f, and the number of negative tabs in each group of negative tabs (130) is e*N / g; where d, e, f, and g are positive integers, f≥2, g≥2, f is the number of groups of positive tabs (120), g is the number of groups of negative tabs (130), and d and e are equal or unequal, and f and g are equal or unequal.

8. The cell structure according to claim 1, characterized in that, A portion of the positive tabs of each of the positive tab groups (120) are connected to one side of the first adapter plate (200), and the remaining portion of the positive tabs are connected to the other side of the first adapter plate (200); and / or a portion of the negative tabs of each of the negative tab groups (130) are connected to one side of the second adapter plate (300), and the remaining portion of the negative tabs are connected to the other side of the second adapter plate (300).

9. The cell structure according to any one of claims 1 to 8, characterized in that, The distance between adjacent positive electrode tabs (120) and negative electrode tabs (130) is L1, the distance between two adjacent positive electrode tabs (120) is L2, and the distance between two adjacent negative electrode tabs (130) is L3. Where: L1>L2=L3.

10. A battery, characterized in that, It includes a housing and a cell structure as described in any one of claims 1 to 9, wherein the cell structure is disposed in the housing.

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