Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, the battery includes: a battery cell including a body and a tab connected to the body; the shell comprises a storage part, a cover body part and a sealing part, the storage part is provided with a storage cavity, and the cover body part is connected to the storage part through the sealing part so as to cover and seal the storage cavity; the cavity wall of the storage cavity comprises a first wall and a second wall, the second wall is connected to the circumferential edge of the first wall in a surrounding mode, the first wall is provided with a thinned area, the battery cell is located in the thinned area, and the second wall comprises a first heat sealing layer, a first metal layer and a first outer layer which are arranged in a stacked mode; the sealing part comprises a second outer layer, a second metal layer, a second heat sealing layer, a second heat sealing layer, a second metal layer and a second outer layer which are arranged in a laminated manner, the tab is positioned between two adjacent second heat sealing layers, the distance between the tab and the second metal layer is L1, the thickness of the first heat sealing layer is L2, L1 is greater than L2, and L1 is equal to 25-90 microns. According to the battery disclosed by the utility model, the anti-corrosion performance can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and electrical equipment. Background Technology

[0002] In related technologies, a battery includes a casing and battery cells, with the casing being an aluminum-plastic film. To increase the battery's energy density, the aluminum-plastic film can be thinned. Specifically, by thinning or removing the PP layer of the aluminum-plastic film, the casing can accommodate more battery cells, thereby increasing the battery's energy density.

[0003] Furthermore, thinning the aluminum-plastic film can lead to battery corrosion. Specifically, thinning the aluminum-plastic film can cause the battery cell to come into contact with the aluminum layer, creating ion channels. Additionally, the tabs may also come into contact with the aluminum layer, creating electron channels. When ion and electron channels form, the battery may corrode, resulting in poor battery performance. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery that can effectively improve corrosion resistance.

[0005] This utility model also proposes an electrical device.

[0006] The battery according to a first aspect embodiment of the present invention includes:

[0007] A battery cell includes a body and tabs, wherein the tabs are connected to the body;

[0008] The housing includes a storage section, a cover section, and a sealing section. The storage section has a storage cavity, and the cover section is connected to the storage section through the sealing section to seal the storage cavity.

[0009] The cavity wall of the storage chamber includes a first wall and a second wall. The second wall surrounds the circumferential edge connected to the first wall. The first wall has a thinned area. The battery cell is located in the thinned area, and the thinned area is located on one side of the battery cell thickness direction. The second wall includes a first heat-sealing layer, a first metal layer, and a first outer layer stacked together. The sealing portion includes a second outer layer, a second metal layer, a second heat-sealing layer, a second heat-sealing layer, a second metal layer, and a second outer layer stacked together. The tab is located between two adjacent second heat-sealing layers. The distance between the tab and the second metal layer is L1. The thickness of the first heat-sealing layer is L2. L1 > L2. L1 = 25 μm ~ 90 μm.

[0010] The battery according to the embodiments of this utility model has at least the following beneficial effects: the first wall has a thinned area, and the cell is located in the thinned area, which can effectively improve the energy density of the battery. The cover portion is connected to the storage portion through a sealing portion, thereby sealing the storage cavity. The electrode tabs are located between two adjacent second heat-sealing layers. The distance between the electrode tabs and the second metal layer is greater than the thickness of the first heat-sealing layer. In the prior art, the distance between the electrode tabs and the second metal layer is small, so the electrode tabs may contact the second metal layer, thereby forming an electronic channel. In this application, the distance between the electrode tabs and the second metal layer is large, which can effectively avoid the electrode tabs contacting the second metal layer and forming an electronic channel. With a very low probability of electronic channel formation, the battery has better corrosion resistance. Specifically, the battery can effectively improve corrosion resistance.

[0011] In some embodiments of the battery according to this utility model, the thickness of the second heat-sealing layer is greater than the thickness of the first heat-sealing layer.

[0012] According to some embodiments of the present invention, the thinned area of ​​the battery includes a third heat-sealing layer, a third metal layer and a third outer layer stacked together. The thickness of the third heat-sealing layer is X, and the thickness difference between the second heat-sealing layer and the first heat-sealing layer is Y, where 1.1Y≥15μm-0.4X≥0.9Y.

[0013] According to some embodiments of the present invention, the thinned area of ​​the battery includes a third metal layer and a third outer layer stacked together, and the thickness difference between the second heat-sealing layer and the first heat-sealing layer is Y, where Y = 5 μm to 50 μm.

[0014] According to some embodiments of the present invention, the battery further includes tab adhesive, one side of which is connected to the second heat-sealing layer, and the other side of which is connected to the tab.

[0015] According to some embodiments of the present invention, the thickness of the tab adhesive in the battery is A, where 10μm≤A≤30μm.

[0016] According to some embodiments of the present invention, the battery further includes a protective layer covering both sides of the tab in the thickness direction.

[0017] According to some embodiments of the present invention, the thickness of the protective layer in the battery is B, where 10μm≤B≤60μm.

[0018] According to some embodiments of the present invention, the battery further includes an adhesive member, one side of which is adhered to the thinned area and the other side of which is adhered to the body.

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

[0020] The electrical device according to the embodiments of this utility model has at least the following beneficial effects: the first wall has a thinned area, and the battery cell is located in the thinned area, which can effectively improve the energy density of the battery. The cover portion is connected to the storage portion through a sealing portion, thereby sealing the storage cavity. The electrode tab is located between two adjacent second heat-sealing layers. The distance between the electrode tab and the second metal layer is greater than the thickness of the first heat-sealing layer. In the prior art, the distance between the electrode tab and the second metal layer is small, so the electrode tab may contact the second metal layer, thereby forming an electronic channel. In this application, the distance between the electrode tab and the second metal layer is large, which can effectively avoid the electrode tab and the second metal layer contacting, thereby preventing the formation of an electronic channel. With a very low probability of electronic channel formation, the battery has better corrosion resistance. Specifically, the battery can effectively improve corrosion resistance. Furthermore, the electrical device with this battery has higher reliability.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of a battery according to some embodiments of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the tabs and tab adhesive in a battery according to some embodiments of the present invention;

[0026] Figure 4 This is a schematic diagram of the tabs, tab adhesive, and protective layer in a battery according to some embodiments of the present invention.

[0027] Figure label:

[0028] Battery 10, cell 100, body 110, tab 120, casing 200, storage section 210, storage cavity 220, first wall 230, thinned area 231, third heat-sealing layer 232, third metal layer 234, third outer layer 235, second wall 240, first heat-sealing layer 241, first metal layer 242, first outer layer 243, cover section 250, sealing section 260, second outer layer 261, second metal layer 262, second heat-sealing layer 263, tab adhesive 300, protective layer 400, adhesive component 500. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] In related technologies, a battery includes a casing and battery cells, with the casing being an aluminum-plastic film. To increase the battery's energy density, the aluminum-plastic film can be thinned. Specifically, by thinning or removing the PP layer of the aluminum-plastic film, the casing can accommodate more battery cells, thereby increasing the battery's energy density.

[0035] Furthermore, thinning the aluminum-plastic film may lead to battery corrosion. Specifically, after thinning the aluminum-plastic film, the battery cell may come into contact with the aluminum layer, thus forming ion channels. Additionally, the tabs may also come into contact with the aluminum layer, forming electron channels. When ion and electron channels occur, the battery's edge voltage increases, its corrosion resistance decreases, and corrosion may occur, resulting in poor battery performance. Therefore, this application proposes a battery.

[0036] Please refer to Figures 1 to 2In some embodiments, the battery 10 includes a cell 100 and a casing 200. The cell 100 includes a body 110 and tabs 120 connected to the body 110. The body 110 includes a positive electrode and a negative electrode. The body 110 can be formed by stacking and winding the positive and negative electrode sheets, or by alternately stacking multiple positive and negative electrode sheets. In some cases, the outermost part of the body 110 in the thickness direction is the positive electrode. The casing 200 includes a storage section 210, a cover section 250, and a sealing section 260. The casing 200 can be an aluminum-plastic film, with the storage section 210 formed by punching indentations in the aluminum-plastic film. The storage section 210 is provided with a storage cavity 220, and the cover section 250 is connected to the storage section 210 through the sealing section 260 to seal the storage cavity 220. Specifically, the cover portion 250 can be rectangular, with one edge of the cover portion 250 connected to the storage portion 210, and the other three edges of the cover portion 250 connected to the storage portion 210 by heat sealing. The sealing portion 260 can be an edge seal. The cavity wall of the storage cavity 220 includes a first wall 230 and a second wall 240. The second wall 240 surrounds the circumferential edge connected to the first wall 230. The first wall 230 has two sections, and each section has a thinning area 231. Specifically, the thinning area 231 refers to a groove formed on the first wall 230, wherein the depth of the groove depends on the thinning degree of the third heat-sealing layer 232, and the bottom wall of the groove can be the third heat-sealing layer 232, or the bottom wall of the groove can be a third metal layer 234. The battery cell 100 is located in the thinning area 231, and the thinning area 231 is located on one side of the thickness direction of the battery cell 100. The second wall 240 includes a first heat-sealing layer 241, a first metal layer 242, and a first outer layer 243 stacked together. The first heat-sealing layer 241 can be a PP layer, the first metal layer 242 can be an aluminum layer, and the first outer layer 243 can be a nylon layer. The sealing portion 260 includes a second outer layer 261, a second metal layer 262, a second heat-sealing layer 263, a second metal layer 262, and a second outer layer 261 stacked together. The second heat-sealing layer 263 can be a PP layer, the second metal layer 262 can be an aluminum layer, and the second outer layer 261 can be a nylon layer. The tab 120 is located between two adjacent second heat-sealing layers 263 and extends outside the storage cavity 220. It should be noted that at the location where the sealing portion 260 does not contact the tab 120, two adjacent second heat-sealing layers 263 will melt together to form a single second heat-sealing layer 263. The distance between the tab 120 and the second metal layer 262 is L1, and the thickness of the first heat-sealing layer 241 is L2, where L1 > L2 and L1 = 25 μm ~ 90 μm.Specifically, the first wall 230 has a thinned area 231, and the battery cell 100 is located in the thinned area 231, which can effectively improve the energy density of the battery 10. The cover portion 250 is connected to the storage portion 210 through the sealing portion 260, thereby sealing the storage cavity 220. The tab 120 is located between two adjacent second heat-sealing layers 263. The distance between the tab 120 and the second metal layer 262 is greater than the thickness of the first heat-sealing layer 241. In the prior art, the distance between the tab 120 and the second metal layer 262 is small, so the tab 120 may contact the second metal layer 262, thus forming an electronic channel. In this application, the distance between the tab 120 and the second metal layer 262 is large, which can effectively prevent the tab 120 and the second metal layer 262 from contacting and forming an electronic channel. With a very low probability of electronic channel formation, the battery 10 has better corrosion resistance. Specifically, the battery 10 can effectively improve corrosion resistance.

[0037] Furthermore, when the thinning degree of the thinning region 231 is large, such as when the third metal layer 234 forms the bottom wall of the groove, the body 110 will come into contact with the third metal layer 234, thereby forming an ion channel. In this case, the formation of the ion channel is unavoidable. Therefore, it is necessary to further avoid the formation of electron channels. In the prior art, when the distance between the tab 120 and the second metal layer 262 is small, the tab 120 may come into contact with the second metal layer 262, thereby forming an electron channel. In this application, the distance between the tab 120 and the second metal layer 262 is large, with a minimum value of 25 μm, which can further prevent the formation of electron channels. The edge voltage of the battery 10 is related to the corrosion resistance of the battery 10. When the edge voltage is large, the corrosion resistance of the battery 10 is poor. Therefore, the edge voltage value of the battery 10 in this application is small, which can improve the corrosion resistance.

[0038] Further, please refer to Figures 1 to 2The value of L1, specifically 25μm to 90μm, can be 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, or 90μm. When L1 < 25μm, the distance between the tab 120 and the second metal layer 262 is too close, and after prolonged use, the tab 120 may come into contact with the second metal layer 262. When L1 > 90μm, the distance between the tab 120 and the second metal layer 262 is too far. While this effectively prevents contact between the tab 120 and the second metal layer 262, it results in poor flatness of the casing 200 at the tab 120 location. L1 > L2 can occur in several ways. For example, if the thickness of the second heat-sealing layer 263 is greater than the thickness of the first heat-sealing layer 241, then L1 > L2 can be achieved by increasing the thickness of the second heat-sealing layer 263. Alternatively, a tab adhesive 300 can be provided between the second heat-sealing layer 263 and the tab 120, or the thickness of the tab adhesive 300 can be increased after its provision, which also achieves L1 > L2. Another example is providing a protective layer 400 on the tab 120, thereby indirectly increasing the distance between the tab 120 and the second metal layer 262, which also achieves L1 > L2. The first scenario is described below: in some embodiments, the thickness of the second heat-sealing layer 263 is greater than the thickness of the first heat-sealing layer 241. This greater thickness can be achieved by increasing the thickness of the second heat-sealing layer 263. For instance, during the manufacturing of the aluminum-plastic film, the position of the sealing portion 260 can be identified, and then the second heat-sealing layer 263 at that position can be thickened. Please refer to the table below.

[0039]

[0040] In the table above, both Comparative Example 1 and Example 1 completely removed the first heat-sealing layer 241, allowing the cell 100 to directly contact the aluminum layer. Compared to Comparative Examples 1 to 4, Examples 1 to 4 thickened the second heat-sealing layer 263 by 11 μm. Examples 2 and Comparative Example 2 had the same thickness of the first heat-sealing layer 241 removed; Examples 3 and Comparative Example 3 had the same thickness of the first heat-sealing layer 241 removed; and Examples 4 and Comparative Example 4 had the same thickness of the first heat-sealing layer 241 removed. The table shows that increasing the thickness of the second heat-sealing layer 263 reduces the edge voltage, thereby improving the corrosion resistance of the battery 10.

[0041] Further, please refer to Figures 1 to 2In some embodiments, the thinning region 231 includes a third heat-sealing layer 232, a third metal layer 234, and a third outer layer 235 stacked together. For example, thinning of the housing 200 can be achieved by providing a groove in the third heat-sealing layer 232. The thickness of the third heat-sealing layer 232 is X, and the thickness difference between the second heat-sealing layer 263 and the first heat-sealing layer 241 is Y, where 1.1Y≥15μm-0.4X≥0.9Y. Specifically, X refers to the remaining thickness of the third heat-sealing layer 232 after thinning. When X=10μm, that is, the thickness of the third heat-sealing layer 232 after thinning is 10μm, the second heat-sealing layer 263 has an additional thickness of 10μm~12.2μm relative to the first heat-sealing layer 241. When 0.9Y > 15μm - 0.4X, the increased thickness of the second heat-sealing layer 263 is too large, which leads to poor flatness and appearance of the casing 200, and also wastes materials. When 1.1Y < 15μm - 0.4X, this results in a higher side voltage of the battery 10, and its corrosion resistance performance will be reduced.

[0042] Further, please refer to Figures 1 to 2 In some embodiments, the thinning region 231 includes a third metal layer 234 and a third outer layer 235 stacked together, that is, the third heat-sealing layer 232 is removed, thereby increasing the energy density of the battery 10. The thickness difference between the second heat-sealing layer 263 and the first heat-sealing layer 241 is Y, where Y = 5 μm to 50 μm. Specifically, Y = 5 μm, 6 μm, 8 μm, 9 μm, 10 μm, 12 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 48 μm, or 50 μm. When Y is greater than 50 μm, the increased thickness of the second heat-sealing layer 263 is too large, which leads to poor flatness of the casing 200, poor appearance, and also wastes material. When Y is less than 5 μm, this leads to a higher side voltage of the battery 10 and a decrease in its corrosion resistance.

[0043] Further, please refer to Figure 3 In some embodiments, the battery 10 further includes tab adhesive 300, one side of which is connected to the second heat-sealing layer 263, and the other side of which is connected to the tab 120. Specifically, the tab adhesive 300 can prevent short circuits between the tab 120 and the aluminum-plastic film, ensuring the safe operation of the battery 10. During the battery 10 encapsulation process, the tab adhesive 300 is heat-sealed and bonded to the aluminum-plastic film, effectively preventing electrolyte leakage. The tab adhesive 300 can firmly fix the tab 120, preventing it from moving or falling off inside the battery 10, thereby maintaining the structural stability of the battery 10. The tab adhesive 300 forms a good sealing effect during encapsulation, preventing external moisture, dust, and other impurities from entering the battery 10 and affecting its performance and lifespan.

[0044] Furthermore, in some embodiments, the thickness of the tab adhesive 300 is A, where 10μm ≤ A ≤ 30μm. Specifically, the greater the thickness of the tab adhesive 300, the greater the distance between the tab 120 and the second heat-sealing layer 263, which can effectively improve the corrosion resistance of the battery 10. Here, A can specifically be equal to 10μm, 12μm, 15μm, 18μm, 20μm, 22μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm, or 30μm. When A is less than 10μm, the distance between the tab 120 and the second metal layer 262 is too close, and after long-term use, the tab 120 may come into contact with the second metal layer 262. When A is greater than 30 μm, the distance between the tab 120 and the second metal layer 262 is too large. Although this can effectively prevent the tab 120 and the second metal layer 262 from contacting, it will result in poor flatness of the housing 200 at the position of the tab 120. It should be noted that the thickness of the tab adhesive 300 in this embodiment is thickened compared to the thickness of the tab adhesive 300 in the prior art.

[0045] Further, please refer to Figure 4 In some embodiments, the battery 10 further includes a protective layer 400, which covers both sides of the tab 120 in the thickness direction. Specifically, the protective layer 400 can be made of vinyl acetate polymer or polyamide adhesive. The protective layer 400 can be applied to the tab 120 by coating, which indirectly increases the distance between the tab 120 and the second heat-sealing layer 263, thereby improving the corrosion resistance of the battery 10.

[0046] Furthermore, in some embodiments, the thickness of the protective layer 400 is B, where 10μm ≤ B ≤ 60μm. Specifically, B can be equal to 10μm, 12μm, 15μm, 18μm, 20μm, 22μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, or 60μm. When B is less than 10μm, the distance between the tab 120 and the second metal layer 262 is too close, and after long-term use, the tab 120 may come into contact with the second metal layer 262. When B is greater than 60μm, the distance between the tab 120 and the second metal layer 262 is too far. Although this can effectively prevent the tab 120 from coming into contact with the second metal layer 262, it will result in poor flatness of the housing 200 at the position of the tab 120.

[0047] Further, please refer to Figure 1In some embodiments, the battery 10 further includes an adhesive member 500, one side of which is adhered to the thinning area 231, and the other side of which is adhered to the body 110. The adhesive member 500 can be adhesive tape, and the body 110 is adhered to the thinning area 231 by the adhesive tape. The adhesive member 500 can fix the battery cell 100. That is, the adhesive member 500 fixes the battery cell 100 in the storage cavity 220, which can effectively prevent the battery cell 100 from sliding in the storage cavity 220.

[0048] In some embodiments, the electrical device includes the battery 10 of any of the above embodiments. Specifically, the first wall 230 has a thinned area 231, and the cell 100 is located in the thinned area 231, which can effectively improve the energy density of the battery 10. The cover portion 250 is connected to the storage portion 210 through the sealing portion 260, thereby sealing the storage cavity 220. The tab 120 is located between two adjacent second heat-sealing layers 263. The distance between the tab 120 and the second metal layer 262 is greater than the thickness of the first heat-sealing layer 241. In the prior art, the distance between the tab 120 and the second metal layer 262 is small, so the tab 120 may contact the second metal layer 262, thereby forming an electronic channel. In this application, the distance between the tab 120 and the second metal layer 262 is large, which can effectively avoid the tab 120 and the second metal layer 262 contacting each other and forming an electronic channel. When the probability of forming an electronic channel is very small, the battery 10 has better corrosion resistance. Specifically, the battery 10 can effectively improve corrosion resistance. Furthermore, electrical devices equipped with this battery 10 have higher reliability.

[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. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery, characterized in that, include: A battery cell includes a body and tabs, wherein the tabs are connected to the body; The housing includes a storage section, a cover section, and a sealing section. The storage section has a storage cavity, and the cover section is connected to the storage section through the sealing section to seal the storage cavity. The cavity wall of the storage chamber includes a first wall and a second wall. The second wall surrounds the circumferential edge connected to the first wall. The first wall has a thinned area. The battery cell is located in the thinned area, and the thinned area is located on one side of the battery cell thickness direction. The second wall includes a first heat-sealing layer, a first metal layer, and a first outer layer stacked together. The sealing portion includes a second outer layer, a second metal layer, a second heat-sealing layer, a second heat-sealing layer, a second metal layer, and a second outer layer stacked together. The tab is located between two adjacent second heat-sealing layers. The distance between the tab and the second metal layer is L1. The thickness of the first heat-sealing layer is L2. L1 > L2. L1 = 25 μm ~ 90 μm.

2. The battery according to claim 1, characterized in that, The thickness of the second heat-sealing layer is greater than the thickness of the first heat-sealing layer.

3. The battery according to claim 2, characterized in that, The thinning region includes a third heat-sealing layer, a third metal layer, and a third outer layer stacked together. The thickness of the third heat-sealing layer is X, and the thickness difference between the second heat-sealing layer and the first heat-sealing layer is Y, where 1.1Y≥15μm-0.4X≥0.9Y.

4. The battery according to claim 2, characterized in that, The thinning zone includes a third metal layer and a third outer layer stacked together, and the thickness difference between the second heat-sealing layer and the first heat-sealing layer is Y, where Y = 5 μm to 50 μm.

5. The battery according to claim 1, characterized in that, The battery also includes tab adhesive, one side of which is connected to the second heat-sealing layer, and the other side of which is connected to the tab.

6. The battery according to claim 5, characterized in that, The thickness of the tab adhesive is A, where 10μm≤A≤30μm.

7. The battery according to claim 1, characterized in that, The battery also includes a protective layer that covers both sides of the tab in the thickness direction.

8. The battery according to claim 7, characterized in that, The thickness of the protective layer is B, where 10μm≤B≤60μm.

9. The battery according to claim 1, characterized in that, The battery also includes an adhesive component, one side of which is bonded to the thinned area, and the other side of which is bonded to the main body.

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

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