Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, the battery comprises a first shell, the first shell is provided with a storage cavity, the cavity wall of the storage cavity comprises a first wall and a second wall which are arranged in a surrounding manner, the first wall is connected with the second wall, and the thickness of the first wall is greater than that of the second wall; and the second shell is connected to the cavity wall of the storage cavity, and the opening of the storage cavity is covered with the second shell in a sealing mode. The battery provided by the utility model can have relatively high energy density.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electrical device. Background Art

[0002] In related technologies, a battery consists of a cover plate, a housing, and a battery cell. The housing is typically made of metal. After the battery cell is installed in the housing, the cover plate is welded to the housing, completing the cell packaging. The housing is provided with a flange structure, and the cover plate and the flange structure are welded to complete the assembly of the cover plate and the housing. Although the flange structure can be used to weld to the cover plate, the design of the flange structure results in a low energy density of the battery. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a battery having a higher energy density.

[0004] The utility model also provides an electricity-consuming device.

[0005] A battery according to an embodiment of the first aspect of the present invention includes:

[0006] A first shell is provided with a storage cavity, wherein a cavity wall of the storage cavity includes a first wall and a second wall arranged around the first wall, the first wall is connected to the second wall, and the thickness of the first wall is greater than the thickness of the second wall;

[0007] The second shell is connected to the cavity wall of the storage cavity and covers the opening of the storage cavity.

[0008] The battery according to the embodiment of the present invention has at least the following beneficial effects: the second shell is connected to the cavity wall of the storage cavity, thereby the second shell closes the opening of the storage cavity; in the prior art, when the first shell and the second shell are connected, a flange structure is provided on the first shell, which results in a low energy density of the battery. In the present application, the first shell and the second shell are connected mainly by connecting the second shell to the cavity wall of the storage cavity, so the flange structure is omitted in the first shell, which can effectively improve the energy density of the battery. Specifically, the battery can have a higher energy density.

[0009] According to some embodiments of the battery of the present invention, the cavity wall of the storage cavity further includes a transition wall, the two ends of the transition wall are respectively connected to the first wall and the second wall, the thickness of the transition wall gradually decreases from the first wall to the second wall, the maximum thickness of the transition wall is equal to the thickness of the first wall, and the minimum thickness of the transition wall is equal to the thickness of the second wall.

[0010] According to some embodiments of the battery of the present invention, along the thickness direction of the first shell, the dimension of the transition wall is A, and A is less than 2 mm.

[0011] In the battery according to some embodiments of the present invention, the thickness of the first shell is H, the dimension of the first wall in the thickness direction of the first shell is L, and 1.5%≤L / H<80%.

[0012] In the battery according to some embodiments of the present invention, the thickness of the first wall is B, the thickness of the second wall is C, and 0.25≤C / B≤0.8.

[0013] According to some embodiments of the battery of the present invention, the first wall is provided with a mounting groove communicating with the storage cavity, and the second shell is connected to the groove wall of the mounting groove.

[0014] According to some embodiments of the battery of the present invention, along the thickness direction of the first shell, the size of the mounting groove is D, 0.03 mm ≤ D < 1 mm.

[0015] According to some embodiments of the battery of the present invention, along the thickness direction of the first wall, the size of the mounting groove is E, the thickness of the first wall is B, and 0.2≤E / B≤0.8.

[0016] According to some embodiments of the battery of the present invention, the thickness of the second shell is G, and along the thickness direction of the first shell, the size of the mounting groove is D, where G≤D.

[0017] According to some embodiments of the present invention, the battery further includes a first pole and a second pole, wherein the first pole is insulated and connected to the first shell, and the second pole is electrically connected to the cavity wall of the storage cavity.

[0018] According to some embodiments of the battery of the present invention, the first electrode includes an outer insulating member and a rivet, the rivet is penetrated by the outer insulating member, two sides of the outer insulating member are respectively connected to the first shell and the rivet, the thickness of the first shell is H, and along the thickness direction of the first shell, the distance between the outer insulating member and the transition wall is N, 0≤N≤1 / 3H.

[0019] The electrical device according to the second embodiment of the present invention includes the battery described in any one of the first embodiment.

[0020] The electrical device according to the embodiment of the present invention has at least the following beneficial effects: the second shell is connected to the wall of the storage cavity, so that the second shell closes the opening of the storage cavity; in the prior art, when the first shell and the second shell are connected, a flange structure is provided on the first shell, which results in a lower energy density of the battery. In the present application, the first shell and the second shell are connected mainly by connecting the second shell to the wall of the storage cavity, so the flange structure is omitted in the first shell, which can effectively improve the energy density of the battery. Specifically, the battery can have a higher energy density. Furthermore, the electrical device with the battery has a better endurance.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 Schematic diagram of explosion of batteries according to some embodiments of the present invention;

[0024] Figure 2 Schematic diagram of batteries according to some embodiments of the present invention;

[0025] Figure 3 A partial cross-sectional schematic diagram of a battery according to a first embodiment of the present invention;

[0026] Figure 4 A partial cross-sectional schematic diagram of a battery according to a second embodiment of the present invention;

[0027] Figure 5 It is a partial cross-sectional schematic diagram of a battery according to a third embodiment of the present invention.

[0028] Reference numerals:

[0029] Battery 100, first shell 200, storage cavity 210, first wall 220, second wall 230, transition wall 240, mounting groove 250, second shell 300, first pole 400, rivet 410, outer insulator 420, inner insulator 430, connector 440, second pole 500, explosion-proof valve 600. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] In related art, a battery 100 includes a cover plate, a housing, and a battery cell. The housing is typically made of metal. After the battery cell is installed in the housing, the cover plate is welded to the housing to complete the cell packaging. The housing is provided with a flange structure, and the cover plate and the flange structure are welded to complete the assembly of the cover plate and the housing. Although the flange structure can be used to weld to the cover plate, the design of the flange structure results in a low energy density of the battery 100. In view of this, the present application proposes a battery 100.

[0036] Please refer to Figures 1 to 4 In some embodiments, the battery 100 includes: a first shell 200, a second shell 300 and a battery cell (not shown). The first shell 200 is provided with a storage cavity 210. The storage cavity 210 can be used to place the battery cell. The second shell 300 can be a cover plate, that is, the second shell 300 is plate-shaped. The battery cell includes a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet is generally composed of materials such as a positive electrode active material, a conductive agent, a binder and a current collector (such as aluminum foil). It is responsible for providing lithium ions when the battery 100 is discharged. The negative electrode sheet is mainly composed of materials such as a negative electrode active material, a conductive agent, a binder and a current collector (such as copper foil). It receives lithium ions from the positive electrode when the battery 100 is charged. The separator is located between the positive electrode sheet and the negative electrode sheet. Its main function is to prevent the positive and negative electrodes from directly contacting each other and causing a short circuit, while allowing lithium ions to pass through during the charging and discharging process. The electrolyte is filled inside the battery cell and provides the necessary medium for the migration of lithium ions. The positive electrode sheet and the negative electrode sheet can be formed into a battery cell by winding or stacking. The cavity wall of the storage cavity 210 includes a first wall 220 and a second wall 230 that are arranged in a surrounding manner. The cavity wall of the storage cavity 210 also includes a bottom wall, and the bottom wall is arranged opposite to the second shell 300. The first wall 220 is connected to one end of the second wall 230, and the other end of the second wall 230 is connected to the edge of the bottom wall in a surrounding manner. The thickness of the first wall 220 is greater than the thickness of the second wall 230, and the first wall 220 is provided with a mounting groove 250 that is connected to the storage cavity 210. The mounting groove 250 has a first opening facing the cover plate, and the mounting groove 250 also has a second opening, and the direction of the second opening is perpendicular to the direction of the first opening. The mounting groove 250 is located at the end of the first wall 220. The second housing 300 may be connected to the wall of the storage cavity 210. The second housing 300 may be disposed in the mounting groove 250 and connected to the wall of the mounting groove 250. Specifically, the second housing 300 may be welded to the wall of the mounting groove 250. The second housing 300 covers the opening of the storage cavity 210. Specifically, the second shell 300 is connected to the cavity wall of the storage cavity 210. After the first wall 220 is provided with the mounting groove 250, the second shell 300 can be set in the mounting groove 250, and the second shell 300 is connected to the groove wall of the mounting groove 250, so that the second shell 300 closes the opening of the storage cavity 210; in the prior art, when the first shell 200 and the second shell 300 are connected, a flange structure is provided on the first shell 200, which will result in a low energy density of the battery 100. In the present application, the first shell 200 and the second shell 300 are connected mainly by providing the second shell 300 in the mounting groove 250. Therefore, the flange structure is omitted in the first shell 200, which can effectively improve the energy density of the battery 100. Specifically, the battery 100 can have a higher energy density. Furthermore, the electric device with the battery 100 has a better endurance.

[0037] Furthermore, it should be noted that the wall thickness of the first wall 220 is greater than the wall thickness of the second wall 230. This not only facilitates the provision of the mounting groove 250 on the first wall 220, but also effectively ensures that the rigidity of the first wall 220 is high after the first wall 220 is thickened, thereby having higher stability. Moreover, after the first wall 220 is thickened, there will be no loss in the energy density of the battery 100. The battery 100 of the present application does not provide a flange structure to achieve the connection between the first shell 200 and the second shell 300. This not only reduces the material waste of the flange structure and reduces the manufacturing cost of the battery 100, but also has the characteristics of simple process. In addition, after not designing the flange structure, the problem of poor welding effect caused by poor flatness of the flange structure can be effectively avoided.

[0038] Furthermore, the first housing 200 can be formed by a stamping process. The material of the first housing 200 can be one of metal, alloy, polymer, and carbon material. If the thickness of the first wall 220 is greater than the thickness of the second wall 230, the first housing 200 may break during stamping, resulting in a low yield rate for the first housing 200. To address this issue, a transition wall 240 can be provided between the first wall 220 and the second wall 230. Specifically, in some embodiments, the walls of the storage chamber 210 further include a transition wall 240. The transition wall 240 has two ends connected to the first wall 220 and the second wall 230, respectively. That is, the second wall 230 has two ends connected to the transition wall 240 and the bottom wall, respectively. The thickness of the transition wall 240 gradually decreases from the first wall 220 to the second wall 230, with the maximum thickness of the transition wall 240 being equal to the thickness of the first wall 220 and the minimum thickness of the transition wall 240 being equal to the thickness of the second wall 230. In this way, by providing the transition wall 240 , the occurrence of breakage of the first shell 200 can be effectively reduced during stamping of the first shell 200 , thereby improving the yield of the first shell 200 and reducing production difficulty.

[0039] For further information, please refer to Figure 3In some embodiments, along the thickness direction of the first shell 200, the dimension of the transition wall 240 is A, and A is less than 2 mm. That is, the length of the transition wall 240 is A. In particular, along the thickness direction of the first shell 200, the dimension of the transition wall 240 can be 1.5 mm, 1 mm, 0.8 mm, or 0.5 mm. When the length of the transition wall 240 is greater than 2 mm, it will lead to greater difficulty in processing the first shell 200. In addition, if the length of the transition wall 240 is greater than 2 mm, it will also lead to an increase in the material usage and weight of the first shell 200, thereby making the weight energy density of the battery 100 low and the cost too high, and will also affect the installation of the pole. The length of the transition wall 240 is less than 2 mm, which can achieve a smooth transition from the thickness of the first wall 220 to the thickness of the second wall 230.

[0040] Further, please refer to Figure 3 In some embodiments, the thickness of the first shell 200 is H. Specifically, the thickness of the first shell 200 is H, which means that the dimension of the first shell 200 in the thickness direction is H. The dimension of the first wall 220 in the thickness direction of the first shell 200 is L, and 1.5% ≤ L / H < 80%. Specifically, the ratio of L / H can be 0.015, 0.2, 0.5, 0.6 or 0.7. It is conceivable that the dimension of the first wall 220 in the thickness direction of the first shell 200 cannot be too small, such as the ratio of L / H is not less than 0.015, otherwise it will make it difficult to process the mounting groove 250 on the first wall 220. The dimension of the first wall 220 in the thickness direction of the first shell 200 does not need to be too large, such as the ratio of L / H is not greater than 0.8, otherwise it will result in excessive material consumption in the first shell 200, increasing the manufacturing cost of the first shell 200.

[0041] For further information, please refer to Figure 4In some embodiments, the thickness of the first wall 220 is B, specifically referring to the thickness of the first wall 220. The thickness of the second wall 230 is C, specifically referring to the thickness of the second wall 230, and 0.25 ≤ C / B ≤ 0.8. Specifically, the ratio of C / B can be 0.25, 0.3, 0.5, 0.7, or 0.8. A larger thickness of the first wall 220 facilitates the processing of the mounting groove 250 and facilitates welding to the second housing 300. A smaller thickness of the second wall 230 reduces the weight of the first housing 200 while ensuring high strength. When the thickness ratio of the second wall 230 to the first wall 220 is less than 0.25, two situations may occur: first, the second wall 230 is too thin, resulting in a lower strength of the first housing 200; second, the first wall 220 is too thick, resulting in a heavier battery 100. When the thickness ratio of the second wall 230 to the first wall 220 is greater than 0.8, there are two situations. In the first situation, the first wall 220 is too thin, which makes the mounting groove 250 difficult to process. In the second situation, the second wall 230 is too thick, which makes the battery 100 heavier.

[0042] For further information, please refer to Figure 4 In some embodiments, the dimension of the mounting groove 250 along the thickness direction of the first shell 200 is D. The dimension D of the mounting groove 250 along the thickness direction of the first shell 200 specifically refers to the depth of the mounting groove 250 being D, where 0.03 mm ≤ D < 1 mm. Specifically, D can be 0.03 mm, 0.5 mm, 0.8 mm, 0.9 mm, or 1 mm. When the dimension of the mounting groove 250 along the thickness direction of the first shell 200 is less than 0.03 mm, the smaller dimension D increases the difficulty in processing and makes welding the second shell 300 more difficult. When the dimension of the mounting groove 250 along the thickness direction of the first shell 200 is greater than 1 mm, since the thickness of the second shell 300 is fixed, if D is too large, after the second shell 300 is installed in the mounting groove 250, the second shell 300 will be recessed relative to the surface of the first shell 200, thereby reducing the space in the storage cavity 210 and resulting in a lower energy density of the battery 100.

[0043] For further information, please refer to Figure 4In some embodiments, along the thickness direction of the first wall 220, the dimension of the mounting groove 250 is E, the thickness of the first wall 220 is B, and 0.2≤E / B≤0.8. Specifically, the dimension E of the mounting groove 250 along the thickness direction of the first wall 220 can be specifically, and the width of the mounting groove 250 is E. The ratio of E / B can specifically be 0.2, 0.3, 0.5, 0.7 or 0.8. When the ratio of E / B is less than 0.2, there are two situations. In the first case, the width of the mounting groove 250 is too small, which will result in a small contact area between the second shell 300 and the mounting groove 250, and poor connection stability between the second shell 300 and the first shell 200. In the second case, the first wall 220 is too thick, and the excessive thickness of the first wall 220 will result in a larger overall weight of the battery 100. When the E / B ratio is greater than 0.8, two situations may occur. In the first situation, the width of the mounting groove 250 is too large, and accordingly, the groove wall of the mounting groove 250 is relatively thin (the sum of the width of the mounting groove 250 and the thickness of the groove wall of the mounting groove 250 is equal to the thickness of the first wall 220), which leads to poor stability of the mounting groove 250. In the second situation, the first wall 220 is too thin, which makes the manufacturing of the mounting groove 250 difficult and reduces the strength of the first wall 220.

[0044] For further information, please refer to Figure 1 and Figure 5In some embodiments, the battery 100 further includes a first electrode 400 and a second electrode 500. The first electrode 400 is insulated and connected to the first shell 200, and the second electrode 500 is electrically connected to the wall of the storage cavity 210. The electrical connection of the second electrode 500 to the wall of the storage cavity 210 may specifically be achieved by welding the second electrode 500 to the wall of the storage cavity 210. Specifically, the battery cell includes a first electrode sheet and a second electrode sheet. The first electrode sheet may be a positive electrode sheet or a negative electrode sheet. The second electrode sheet may be a positive electrode sheet or a negative electrode sheet. The first electrode sheet has a first tab, and the second electrode sheet has a second tab. The first tab is electrically connected to the first electrode 400, and the second tab is electrically connected to the second electrode 500, thereby enabling charging and discharging of the battery cell with the outside world. After the second electrode 500 is electrically connected to the wall of the storage cavity 210, the first shell 200 and the second shell 300 can be positively or negatively charged. After the first pole 400 is insulated and connected to the first shell 200, a short circuit in the battery 100 can be effectively prevented. The specific method of insulating the first pole 400 to the first shell 200 can be: the first pole 400 includes a rivet 410, an outer insulator 420, an inner insulator 430, and a connector 440. The rivet 410 passes through the outer insulator 420, the first shell 200, and the inner insulator 430 in sequence. The rivet 410 and the connector 440 are connected together, and the connector 440 is welded to the first tab. The material of the rivet 410 is one of aluminum alloy, nickel-plated copper, and red copper. The material of the inner insulator 430 and the outer insulator 420 is one of PFA, PBT, PPS, PP, PE, and fluororubber. The material of the connector 440 is aluminum or other conductive materials with a melting point difference of less than 300°C from aluminum. The material of the second pole 500 can be one of nickel, copper, nickel-plated copper, and copper-nickel composite.

[0045] For further information, please refer to Figure 5 In some embodiments, the first terminal 400 includes an outer insulator 420 and a rivet 410. The rivet 410 is disposed through the outer insulator 420. The outer insulator 420 is connected to the first housing 200 and the rivet 410 on either side. The thickness of the first housing 200 is H. The distance between the outer insulator 420 and the transition wall 240 along the thickness direction of the first housing 200 is N, where 0 ≤ N ≤ 1 / 3H. Specifically, when the distance between the outer insulator 420 and the transition wall 240 is less than 0, the outer insulator 420 overlaps the transition wall 240, resulting in poor sealing between the outer insulator 420 and the first housing 200. When the distance between the outer insulator 420 and the transition wall 240 is greater than 1 / 3H, since the thickness of the first housing 200 is generally fixed, the larger the distance between the outer insulator 420 and the transition wall 240, the smaller the transition wall 240 in the thickness direction of the first housing 200, thereby increasing the difficulty of manufacturing.

[0046] For further information, please refer to Figure 1 In some embodiments, the second housing 300 is further provided with an explosion-proof valve 600. After the explosion-proof valve 600 is provided in the second housing 300, when the pressure in the storage chamber 210 is high, the explosion-proof valve 600 can discharge the gas in the storage chamber 210, thereby effectively preventing the risk of explosion of the battery 100. The explosion-proof valve 600 can be formed on the second housing 300 after etching.

[0047] For further information, please refer to Figure 3 and Figure 4 In some embodiments, the thickness of the second housing 300 is G, and the dimension of the mounting groove 250 along the thickness direction of the first housing 200 is D, where G ≤ D. Specifically, the second housing 300 is positioned within the mounting groove 250 along the thickness direction of the first housing 200. When the thickness of the second housing 300 is greater than the dimension of the mounting groove 250 along the thickness direction of the first housing 200, the second housing 300 protrudes relative to the surface of the first housing 200, which results in a lower volumetric energy density of the battery 100.

[0048] In some embodiments, the electrical device includes the battery 100 of any of the above embodiments. Specifically, the second shell 300 is connected to the cavity wall of the storage cavity 210. After the first wall 220 is provided with the mounting groove 250, the second shell 300 can be set in the mounting groove 250, and the second shell 300 and the groove wall of the mounting groove 250 are connected, so that the second shell 300 closes the opening of the storage cavity 210. In the prior art, when the first shell 200 and the second shell 300 are connected, a flange structure is set on the first shell 200, which will result in a low energy density of the battery 100. In the present application, the first shell 200 and the second shell 300 are connected mainly by setting the second shell 300 in the mounting groove 250. Therefore, the flange structure is omitted in the first shell 200, which can effectively improve the energy density of the battery 100. Specifically, the battery 100 can have a higher energy density. Furthermore, the electrical device with the battery 100 has a better endurance.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A battery, characterized in that include: A first shell is provided with a storage cavity, wherein a cavity wall of the storage cavity includes a first wall and a second wall arranged around the first wall, the first wall is connected to the second wall, and the thickness of the first wall is greater than the thickness of the second wall; The second shell is connected to the cavity wall of the storage cavity and covers the opening of the storage cavity.

2. The battery according to claim 1, characterized in that The cavity wall of the storage cavity also includes a transition wall, the two ends of which are respectively connected to the first wall and the second wall. The thickness of the transition wall gradually decreases from the first wall to the second wall. The maximum thickness of the transition wall is equal to the thickness of the first wall, and the minimum thickness of the transition wall is equal to the thickness of the second wall.

3. The battery according to claim 2, characterized in that Along the thickness direction of the first shell, the dimension of the transition wall is A, where A is less than 2 mm.

4. The battery according to claim 1, characterized in that The thickness of the first shell is H, the dimension of the first wall in the thickness direction of the first shell is L, and 1.5%≤L / H<80%.

5. The battery according to claim 1, characterized in that The thickness of the first wall is B, the thickness of the second wall is C, and 0.25≤C / B≤0.

8.

6. The battery according to claim 1, characterized in that The first wall is provided with a mounting groove communicated with the storage cavity, and the second shell is connected to the groove wall of the mounting groove.

7. The battery according to claim 6, characterized in that Along the thickness direction of the first shell, the size of the installation groove is D, 0.03mm≤D<1mm.

8. The battery according to claim 6, characterized in that Along the thickness direction of the first wall, the size of the installation groove is E, the thickness of the first wall is B, and 0.2≤E / B≤0.

8.

9. The battery according to claim 6, characterized in that The thickness of the second shell is G, and along the thickness direction of the first shell, the size of the installation groove is D, G≤D.

10. The battery according to claim 2, characterized in that The battery further includes a first pole and a second pole, wherein the first pole is insulated and connected to the first shell, and the second pole is electrically connected to the cavity wall of the storage cavity.

11. The battery according to claim 10, characterized in that The first pole includes an outer insulating member and a rivet, the rivet is penetrated by the outer insulating member, and the two sides of the outer insulating member are respectively connected to the first shell and the rivet, the thickness of the first shell is H, and along the thickness direction of the first shell, the distance between the outer insulating member and the transition wall is N, 0≤N≤1 / 3H.

12. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 11.

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