Batteries and electrical equipment

Abstract

This utility model provides a battery and an electrical device. The battery includes a casing, a cell assembly, and a terminal assembly. The casing has an internal cavity and includes a first inner sidewall and a second inner sidewall opposite to each other, with a distance A between them. The top of the casing has an opening. The cell assembly includes multiple cell bodies and a tab assembly, with one end of the tab assembly connected to the multiple cell bodies. The terminal assembly is connected to the other end of the tab assembly and covers the opening. The tab assembly forms at least one bend between the cell body and the terminal assembly. In the direction from the cell assembly to the terminal assembly, the first bend has a first recess facing the first inner sidewall, with a distance B between the first recess and the first inner sidewall. The ratio of B to A satisfies 0.18-1.6. This battery is based on improvements to the length and bending direction of the tabs to reduce the occurrence of poor overcurrent performance or short circuits due to overlap.

Description

Technical Field

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

[0002] A battery typically includes a casing, a cell housed within the casing, and terminals connected to the cell. In related technologies, to simplify battery assembly, an opening for terminal connection is usually provided on one side of the casing. The cell is led out through a tab at one end and directly connected to the terminal, and then the terminal is covered by the opening to complete the battery assembly. However, after the terminal is covered by the opening, the tab connecting the terminal and the cell will be bent inside the casing. If the length and bending direction of the tab are not controlled, poor overcurrent performance or short circuits may occur. Utility Model Content

[0003] In view of the above-mentioned technical problems, this utility model provides a battery and electrical device, which improves the length and bending direction of the tabs to reduce the occurrence of poor overcurrent performance or short circuits due to overlap, thereby at least partially solving the above-mentioned technical problems.

[0004] In a first aspect, this disclosure provides a battery, comprising: a housing having an internal cavity, the housing including a first inner sidewall and a second inner sidewall opposite to each other, the distance between the first inner sidewall and the second inner sidewall being A, and an opening at the top of the housing; a cell assembly including a plurality of cell bodies and a tab assembly, one end of the tab assembly being electrically connected to the plurality of cell bodies; and a terminal assembly connected to the other end of the tab assembly and covering the opening, the tab assembly forming at least one bend between the cell bodies and the terminal assembly, the first bend having a first recess in the direction along the cell assembly to the terminal assembly, the first recess being disposed toward the first inner sidewall, the distance between the first recess and the first inner sidewall being B, and the ratio of B to A satisfying 0.18-1.6.

[0005] By controlling the distance B between the first recess and the first inner sidewall, the battery can be assembled by first inserting multiple battery cells into the housing cavity, then pre-connecting the two ends of the tab assembly to the battery cells and the terminal assembly, respectively. Before covering the opening with the terminal assembly, the bending shape of the tab assembly can be finely adjusted so that the distance B between the first recess and the first inner sidewall is within the range of the minimum and maximum values ​​of B and A. Then, the terminal assembly can be welded and fixed to the opening to complete the battery assembly. After the battery is assembled, the distance between the first recess and the first inner sidewall inside the housing is determined so that the ratio of B to A is between 0.18 and 1.6. This can reduce short circuits caused by the first recess of the tab assembly being too close to the first inner sidewall, and also reduce the problem of poor current flow performance caused by the first recess of the tab assembly being too far from the first inner sidewall.

[0006] Secondly, this disclosure provides an electrical device that includes the battery described in the above solution. Since the battery pack includes the battery described above and has the same effect as the battery described above, it will not be described again here. Attached Figure Description

[0007] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the battery structure provided in an exemplary embodiment of the present utility model;

[0009] Figure 2 for Figure 1 A magnified view of the area at position F in the middle;

[0010] Figure 3 for Figure 1 A magnified view of the area at position F'.

[0011] Explanation of reference numerals in the attached figures:

[0012] 1. Shell; 101. Receiving cavity; 102. Opening; 110. First inner wall; 120. Second inner wall;

[0013] 2. Battery cell assembly; 210. Battery cell body; 220. Electrode assembly; 2201. First segment; 2202. Second segment; 2203. Third segment; 221. Electrode; 222. Adapter; 230. Bending portion; 231. First bending portion; 232. Second bending portion; 2322. First protrusion; 2311. First recess;

[0014] 3. Pole post assembly. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] A battery typically includes a casing, a cell housed within the casing, and terminals connected to the cell. In related technologies, to simplify battery assembly, an opening for terminal connection is usually provided on one side of the casing. The cell is led out through a tab at one end and directly connected to the terminal. The terminal is then covered by the opening to complete the battery assembly. However, after the terminal is covered by the opening, the tab connecting the terminal and the cell will be bent inside the casing. If the length and bending direction of the tab are not controlled, poor overcurrent performance or short circuits may occur.

[0017] In view of the above-mentioned technical problems, the first aspect of this disclosure provides a battery, with reference to... Figures 1 to 3 As shown, the battery includes a casing 1, a cell assembly 2, and a terminal assembly 3. The casing 1 has an internal cavity 101 and includes opposing first inner sidewalls 110 and 120, with a distance A between them. The top of the casing 1 has an opening 102. The cell assembly 2 includes multiple cell bodies 210 and a tab assembly 220, one end of which is electrically connected to the multiple cell bodies 210. The terminal assembly 3 is connected to... The tab assembly 220 is attached to the other end of the tab assembly 220 and covers the opening 102. The tab assembly 220 forms at least one bend 230 between the cell body 210 and the terminal assembly 3. In the direction along the cell assembly 2 to the terminal assembly 3, the first bend 230 has a first recess 2311. The first recess 2311 is disposed toward the first inner sidewall 110. The distance between the first recess 2311 and the first inner sidewall 110 is B. The ratio of B to A satisfies 0.18-1.6.

[0018] Through the above-described technical solution, namely the battery provided in this disclosure, by controlling the distance B between the first recess 2311 and the first inner sidewall 110, during battery assembly, multiple cell bodies 210 can be first installed into the receiving cavity 101 of the housing 1. Then, the two ends of the electrode assembly 220 are pre-connected to the cell body 210 and the terminal assembly 3, respectively. Before covering the opening 102 with the terminal assembly 2, the bending shape of the electrode assembly 220 can be finely adjusted in advance so that the distance B between the first recess 2311 and the first inner sidewall 110 satisfies the minimum and maximum values ​​of B and A. Within the specified range, the terminal assembly 3 and the opening 102 can be welded and fixed to complete the battery assembly. After the battery is assembled, the distance between the first recess 2311 and the first inner wall 110 inside the housing 1 can be determined by computer tomography, that is, the ratio of B to A is between 0.18 and 1.6. This can reduce the short circuit caused by the first recess 2311 of the electrode assembly 220 being too close to the first inner wall 110, and can also reduce the problem of poor current flow performance caused by the first recess 2311 of the electrode assembly 220 being too far from the first inner wall 110.

[0019] It should be noted that in the above embodiments, the battery can be either a prismatic battery or a cylindrical battery. When a prismatic battery is used, multiple cell bodies 210 can be arranged side by side along the length direction of the prismatic battery casing 1. In this case, the first inner sidewall 110 and the second inner sidewall 120 can respectively represent two inner sidewalls of the prismatic battery that are spaced apart in the length direction, and the distance A can also be understood as the straight-line distance between the two inner sidewalls. When a cylindrical battery is used, the distance A between the first inner sidewall 110 and the second inner sidewall 120 can be understood as the diameter of the cylindrical battery casing 1, that is, the diameter of the inner wall of the cylindrical battery casing 1.

[0020] Furthermore, if the ratio of distance B to A exceeds 1.6, i.e., exceeds the maximum value, the distance between the first recess 2311 and the first inner sidewall 110 will be too far. In this case, the bending degree of the tab assembly 220 itself will increase, and the length of the tab assembly 220 itself will also need to be increased, which will easily cause the current carrying capacity of the tab assembly 220 to decrease. On the other hand, if the ratio of distance B to A is less than 0.18, i.e. less than the minimum value, the distance between the first recess 2311 and the first inner sidewall 110 will be too close. With the total length of the tab assembly 220 unchanged, the tab assembly 220 is likely to overlap with the inner wall of the housing 1, which may easily lead to a short circuit in the battery.

[0021] To facilitate a further understanding of the background technology and the present solution by those skilled in the art, the battery function mentioned above typically has the ability to store chemical energy and controllably convert chemical energy into electrical energy. In recyclable batteries, the active materials can be activated by charging after discharge and can continue to be used. It typically includes a casing and a battery cell disposed within the casing.

[0022] The aforementioned battery cell is the component in a battery where electrochemical reactions occur. It is the smallest unit in a battery capable of performing electrochemical reactions such as charging and discharging, and typically includes a positive electrode, a negative electrode, and a separator. Lithium-ion battery cells primarily function by the insertion and extraction of lithium ions between the positive and negative electrodes. In cylindrical cells, a three-layer thin-film structure is wound into a cylindrical electrode assembly, while in cuboid cells, the thin-film structure is wound or stacked into an electrode assembly with a roughly cuboid shape.

[0023] The aforementioned housing is a component used to provide a space to house electrode assemblies and other parts, isolating them from the external environment. The housing generally includes a body with an opening at at least one end and a receiving cavity. The opening can be closed by a cover plate, sealing and isolating the internal environment of the battery cell from the external environment. Housing materials include, but are not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and aluminum-plastic film.

[0024] The aforementioned tab assembly is typically located on one side of the positive / negative current collector and is either separate from or integrally formed with the current collector. It is electrically connected to the current collector to conduct current through it. It is made of a highly conductive metallic material (such as copper, aluminum, or nickel).

[0025] Furthermore, in the above embodiments, by limiting the ratio of B to A to between 0.18 and 1.6, the ratio of B to A can be any value among 0.18, 0.2, 0.6, 0.8, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 or 0.18-1.6.

[0026] To further limit the scope of A and B, you can refer to... Figures 1 to 3 As shown, in some smaller batteries, the range of A is 22mm-70mm, and the range of B is 12mm-35mm.

[0027] In the above manner, for smaller square or cylindrical batteries, the range of A can be 22mm-70mm, and the range of B can be 12mm-35mm. Thus, the ratio of B to A remains within the range of 0.18 to 1.6, and the lengths of A and B can also match the internal space of the battery casing 1.

[0028] Specifically, the range of A can be any suitable value between 22mm and 70mm. For example, 22mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, etc. can be selected. Different values ​​can be selected according to the actual situation. This embodiment does not make specific limitations on this.

[0029] Furthermore, the range of B can be any suitable value between 12mm and 35mm, such as 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, etc. The specific value can be selected according to the actual situation, and this embodiment does not impose too many restrictions on this.

[0030] In some implementations, reference Figures 1 to 3 As shown, along the direction from the cell assembly 2 to the terminal assembly 3, the bending portion 230 includes a first bending portion 231 and a second bending portion 232. A first recess 2311 is formed on the first bending portion 231, and a second recess 2321 is provided on the second bending portion 232. The orientations of the first recess 2311 and the second recess 2321 are opposite.

[0031] By bending the tab assembly 220 into three segments via the first bending portion 231 and the second bending portion 232, the tab assembly 220 can be positioned more flexibly within the receiving cavity 101 when connected to the terminal assembly 3 and the cell body 210. Furthermore, referring to… Figure 2 As shown, the tab assembly 220 is bent into an S-shape by the first bending portion 231 and the second bending portion 232, which can reduce or prevent the tab assembly 220 from being inserted upside down into the cell body 210 and causing a short circuit.

[0032] In some implementations, reference Figures 1 to 3 As shown, a first protrusion 2322 is provided on the second bending portion 232. The first protrusion 2322 is positioned toward the first inner sidewall 110. The distance between the first protrusion 2322 and the first inner sidewall 110 is C, where C satisfies 10mm-25mm.

[0033] To further prevent short circuits between the tab assembly 220 and the housing, the distance between the first protrusion 2322 and the first inner wall 110 needs to be limited. Specifically, C must be within the range of 10mm-25mm. If C is less than 10mm (the minimum value), the distance between the first protrusion 2322 and the first inner wall 110 will be too close, potentially causing the first protrusion 2322 to short circuit against the inner wall of the housing 1, or due to the tab assembly 220... If the length is too long, the first protrusion 2322 may be inserted upside down into the cell body 210 due to gravity, causing a short circuit. When C is greater than 25mm, that is, greater than the maximum value, the tab assembly 220 may be too short, making it difficult to assemble with the terminal assembly 3. Therefore, limiting C to between 10mm and 25mm can ensure that the tab assembly 220 will not cause a short circuit due to excessive length, and also ensure that the tab assembly 220 will not cause assembly difficulties due to excessive length.

[0034] Furthermore, the specific value of C can be reasonably selected according to the actual situation, as long as it is between 10mm and 25mm. For example, the distance of C can be selected as 10mm, 15mm, 20mm, 25mm, etc. This embodiment does not impose too many restrictions on this.

[0035] In some implementations, reference Figures 1 to 3 As shown, the minimum distance between the first recess 2311 and the cell body 210 is D, which satisfies 0.1mm-0.6mm, and the minimum distance between the cell body 210 and the inner top wall of the casing 1 is E, which satisfies 2.3mm-5mm.

[0036] In the above manner, the position of the first recess 2311 in the height direction of the battery also needs to be reasonably controlled. Here, distance D can be understood as the vertical distance between the first recess 2311 and the cell body 210 in the height direction of the battery, and distance E can be understood as the vertical distance between the cell body 210 and the inner top wall of the casing 1. By limiting the range of D and E, the situation where the first recess 2311 is too close to the terminal assembly 3 and sticks to the terminal assembly 3 can be reduced, thereby reducing the occurrence of short circuits. It can also reduce or prevent the first recess 2311 from being too far from the terminal assembly 3 and too close to the cell body 210, thereby allowing the bending part 230 to stably form the bending of the first recess 2311.

[0037] It can be understood that when D is less than 0.1mm, the first recess 2311 will be too close to the terminal assembly 3, and the first recess 2311 will easily stick to the terminal assembly 3, which will easily cause a short circuit. When D is greater than 0.6mm, the first recess 2311 will be too close to the cell body 210, the bending part 230 cannot stably form the first recess 2311, and the tab assembly 220 is also prone to breakage due to inability to bend properly. Therefore, by comprehensively considering the ranges of D and E, the normal overcurrent performance of the tab assembly 220 can be maximized.

[0038] Furthermore, in the above embodiments, the specific value of D can be any suitable value selected according to the actual situation, as long as it is within the range of 0.1mm to 0.6mm. For example, D can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm. This embodiment does not impose any restrictions on this.

[0039] The specific value of E can be any suitable value depending on the actual situation, as long as it is within the range of 2.3mm-5mm. For example, E can be 2.3mm, 2.5mm, 3mm, 3.2mm, 4mm, 4.5mm, or 5mm. This embodiment does not impose any restrictions on this.

[0040] Furthermore, in the above embodiment, when the number of bending portions 230 is one, and A satisfies 22mm-70mm and B satisfies 12mm-35mm, the distance between the first recess 2311 and the cell body 210, i.e., the range of D, can be further reduced to 0.11mm-0.42mm. Within this range, the range of D is the distance range of the tab assembly 220 under pressure after bending.

[0041] When arranging according to the above implementation method, the specific size of D can also be reasonably selected according to the actual situation. For example, D can be selected as 0.11mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, or 0.42mm, as long as the selection range of D is between 0.11mm and 0.42mm.

[0042] In the above embodiment, when the bending portion 230 includes the first bending portion 231 and the second bending portion 232, the distance D between the first recess 2311 and the cell body 210 can be further reduced to 0.15mm-0.6mm. Within this range, the range of D is the distance with some redundant space after the tab assembly 220 is bent.

[0043] When arranging according to the above implementation method, the specific size of D can also be reasonably selected according to the actual situation. For example, D can be selected as 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm, as long as the selection range of D is between 0.15mm and 0.6mm.

[0044] In some implementations, reference Figures 1 to 3 As shown, multiple battery cell bodies 210 are connected to tabs 221, and the multiple tabs 221 are brought together to form a tab assembly 220.

[0045] In the above manner, multiple tabs 221 can be connected to multiple cell bodies 210 one by one, and after being gathered together, they are connected to the terminal assembly 3, so as to realize the transmission of electrical energy from the cell body 210 to the terminal assembly 3, so as to realize the normal power supply of the battery.

[0046] It should be noted that the convergence position of the multiple tabs 221 can be any suitable position. Specifically, a reasonable position can be selected based on the actual space of the receiving cavity 101 inside the battery casing 1. For example, the convergence position of the multiple tabs 221 can be selected as the position of the multiple cell bodies 210 located at the edge, or it can be converged towards the center of the multiple cell bodies 210.

[0047] Specifically, you can refer to Figure 2 and Figure 3 As shown, multiple tabs 221 converge toward the center of multiple battery cell bodies 210, and after the multiple tabs 221 converge, they are bent to form a first bent portion 231.

[0048] In this way, multiple tabs 221 converge toward the center of the cell body 210, which can minimize the bending of some tabs 221 connected to the edge of the cell body 210, thereby reducing the possibility of tabs 221 breaking due to bending and further improving the service life of the tabs.

[0049] In some implementations, reference Figures 1 to 3 As shown, the portion of the tab assembly 220 located between the cell body 210 and the first bending portion 231 is the first segment 2201; the portion of the tab assembly 220 located between the first bending portion 231 and the second bending portion 232 is the second segment 2202; and the portion of the tab assembly 220 located between the second bending portion 232 and the terminal assembly 3 is the third segment 2203.

[0050] In the above manner, the tab assembly 220 is divided into a first segment 2201, a second segment 2202, and a third segment 2203. When the terminal assembly 3 is connected to the cell body 210, the tab assembly 220 can form an S-shaped structure through the three segments, which facilitates the connection between the cell body 210 and the terminal assembly 3 via the tab assembly 220, and also provides good overcurrent performance. Figure 2 and Figure 3 As shown, the second segment 2202 and the third segment 2203 can be straight segments connected to both ends of the second bend 232, respectively. In this arrangement, the straight second segment 2202 and the straight third segment 2203 can further improve the overall current flow performance of the tab assembly 220.

[0051] The first segment 2201 can be connected to multiple battery cell bodies 210, and after forming a converged segment, it is connected to the first bending part 231, thereby enabling the electrical energy released by multiple battery cell bodies 210 to be combined.

[0052] Furthermore, the second segment 2202 is connected to the first bending portion 231 and the second bending portion 232 respectively, which facilitates the bending of the first bending portion 231 and the second bending portion 232 themselves, making it easier to form two bent grooves. The second segment 2202 can also play a good buffering role. The third segment 2203 facilitates the welding of the tab 221 and the pole post assembly 3, and also has a certain buffering role.

[0053] In some implementations, reference Figures 1 to 3 As shown, the length G of the second segment 2202 is less than half the distance A between the first inner wall 110 and the second inner wall 120; the length H of the third segment 2203 is less than half the distance A between the first inner wall 110 and the second inner wall 120.

[0054] By controlling the lengths of the second segment 2202 and the third segment 2203 through the two methods described above, short circuits that might occur due to excessive length of the second segment 2202 and the third segment 2203 potentially causing the battery cell body 210 to be inserted upside down or to overlap with the inner wall of the housing 1 can be reduced or prevented. Figure 2 and Figure 3As shown, when the length G of the second segment 2202 exceeds half of A, the distance between the first protrusion 2322 and the first inner wall 110 will also shorten. At this time, the second segment 2202 is prone to short circuit due to its excessive length overlapping the first inner wall 110 of the housing 1. Alternatively, the increased length of the second segment 2202 will also increase the gravity, making it easy for the end near the first protrusion 2322 to droop and for the battery cell body 210 to be inserted upside down. When the length H of the third segment 2203 exceeds half of A, since the position of the third segment 2203 connected to the pole assembly 3 remains unchanged, the distance between the first protrusion 2322 and the first inner wall 110 will also shorten, which will also easily cause the first protrusion 2322 to overlap the first inner wall 110 and short circuit.

[0055] In some implementations, reference Figures 1 to 3 As shown, the tab assembly 220 also includes an adapter 222, through which the tab assembly 220 is connected to the pole assembly 3.

[0056] In the above manner, the adapter 222 can stably transmit the current output from the battery cell 210 to the terminal assembly 3. The adapter 222 can specifically adopt any suitable structure, for example... Figures 1 to 3 In this case, the adapter can adopt a sheet-like structure.

[0057] A second aspect of this disclosure provides an electrical device that includes the battery mentioned in the above-described embodiments and has all the beneficial effects of the above-described embodiments. The electrical device can be any device capable of using the battery, such as a mobile phone, tablet computer, or power bank in a smart device; it can also be a lighting device such as a flashlight or work light; or it can be a cooking device such as an electric cooker, electric baking pan, or rice cooker, etc. This disclosure does not impose any further limitations on this.

[0058] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope of protection claimed in this disclosure.

Claims

1. A battery, characterized by, include: The housing (1) has an internal cavity (101). The housing (1) includes a first inner sidewall (110) and a second inner sidewall (120) opposite to each other. The distance between the first inner sidewall (110) and the second inner sidewall (120) is A. The top of the housing (1) is provided with an opening (102). The battery cell assembly (2) includes a plurality of battery cell bodies (210) and a tab assembly (220), one end of the tab assembly (220) being electrically connected to the plurality of battery cell bodies (210); A terminal assembly (3) is connected to the other end of the tab assembly (220) and covers the opening (102). The tab assembly (220) forms at least one bend (230) between the cell body (210) and the terminal assembly (3). In the direction along the cell assembly (2) to the terminal assembly (3), the first bend (230) has a first recess (2311) facing the first inner sidewall (110). The distance between the first recess (2311) and the first inner sidewall (110) is B, and the ratio of B to A satisfies 0.18-1.

6.

2. The battery of claim 1, wherein, A is within the range of 22mm-70mm.

3. The battery according to claim 1 or 2, characterized in that, The range of B is 12mm-35mm.

4. The battery of claim 1, wherein, Along the direction from the cell assembly (2) to the terminal assembly (3), the bending portion (230) includes a first bending portion (231) and a second bending portion (232), the first recess (2311) is formed on the first bending portion (231), and the second bending portion (232) is provided with a second recess (2321), the first recess (2311) and the second recess (2321) are oriented oppositely.

5. The battery of claim 4, wherein, The second bending portion (232) is provided with a first protrusion (2322), the first protrusion (2322) is disposed toward the first inner sidewall (110), and the distance between the first protrusion (2322) and the first inner sidewall (110) is C, where C satisfies 10mm-25mm.

6. The battery of claim 4, wherein, The minimum distance between the first recess (2311) and the cell body (210) is D, where D satisfies 0.1mm-0.6mm. The minimum distance between the cell body (210) and the inner top wall of the shell (1) is E, where E satisfies 2.3mm-5mm.

7. The battery of claim 6, wherein, The distance between the first recess (2311) and the battery cell body (210) is 0.11mm-0.42mm.

8. The battery of claim 6, wherein, The distance between the first recess (2311) and the battery cell body (210) is 0.15mm-0.6mm.

9. The battery of claim 4, wherein, Each of the multiple battery cell bodies (210) is connected to a tab (221), and the multiple tabs (221) are brought together to form the tab assembly (220).

10. The battery of claim 9, wherein, The multiple tabs (221) converge toward the center of the multiple battery cell bodies (210), and after the multiple tabs (221) converge, they are bent to form the first bent portion (231).

11. The battery of claim 10, wherein, The portion of the electrode assembly (220) located between the battery cell body (210) and the first bent portion (231) is the first segment (2201); The portion of the electrode assembly (220) located between the first bend (231) and the second bend (232) is the second segment (2202); The portion of the tab assembly (220) located between the second bend (232) and the pole assembly (3) is the third segment (2203).

12. The battery of claim 11, wherein, The length G of the second segment (2202) is less than half the distance A between the first inner wall (110) and the second inner wall (120).

13. The battery of claim 11, wherein, The length H of the third segment (2203) is less than half the distance A between the first inner wall (110) and the second inner wall (120).

14. The battery of claim 1, wherein, The tab assembly (220) further includes an adapter (222), through which the tab assembly (220) is connected to the pole assembly (3).

15. An electrical device, characterized by Includes the battery as described in any one of claims 1-14.

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