A battery and an electrical device

Abstract

This application discloses a battery and an electrical device. The battery includes a cell and a circuit board. The cell includes a main body, a sealing edge, and a tab. The main body and the sealing edge form a receiving cavity, and the circuit board is disposed within the receiving cavity. The tab extends from the end of the sealing edge away from the main body and includes a bent section and an extension section. The extension section is electrically connected to the circuit board. One end of the bent section is connected to the end of the sealing edge away from the main body, and the other end of the bent section extends obliquely toward the receiving cavity and connects to the extension section. By providing a bent section and an extension section in the tab, with one end of the bent section connected to the end of the sealing edge away from the main body and the other end extending obliquely toward the receiving cavity and connecting to the extension section, this application can distribute some of the force when the tab is subjected to external force, reducing the risk of the tab breaking easily due to local stress concentration and improving the reliability of the tab connection.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery and an electrical device. Background Technology

[0002] Batteries, with their advantages such as high energy density and environmental friendliness, are being used more and more widely. As battery production technology continues to develop, people's performance requirements for batteries are also gradually increasing.

[0003] A battery typically consists of a cell, a casing surrounding the cell, and a protection board. The tabs on the cell are electrically connected to the protection board via nickel strips. However, in batteries of certain technologies, the tabs can deform under external forces, leading to tab breakage. This affects the reliability of the tab connection and may even cause battery safety issues. Utility Model Content

[0004] This application aims to provide a battery and electrical device that can solve the problem that the large space occupied by the protection board and nickel sheet in the related technology leads to the low energy density of the battery.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a battery, comprising: a battery cell and a circuit board; The height direction of the battery cell is a first direction; the battery cell includes a main body, an edge sealing part, and a tab, the edge sealing part is disposed on one side of the main body along the first direction, the main body and the edge sealing part enclose a receiving cavity, and the circuit board is disposed in the receiving cavity; The electrode tab extends from the end of the sealing portion away from the main body portion. The electrode tab includes a bent section and an extension section. The extension section is electrically connected to the circuit board. One end of the bent section is connected to the end of the sealing portion away from the main body portion. The other end of the bent section extends obliquely toward the receiving cavity and is connected to the extension section.

[0006] Optionally, the circuit board has a first plane on the side facing the extension section. Along the direction perpendicular to the first plane, the distance from the end of the sealing portion away from the main body to the first plane is D1, and the distance from the end of the bent section connected to the extension section to the first plane is D2, satisfying: 0.1mm≤D1-D2≤0.8mm.

[0007] Optionally, the bent section and the extended section form an angle θ that satisfies: 105°≤θ≤165°.

[0008] Optionally, the main body has a top wall on the side facing the sealing portion, and the sealing portion is connected to the top wall and surrounds the top wall to form the receiving cavity; along the first direction, the distance between the end face of the sealing portion away from the main body and the top wall is D3, which satisfies: D3≤2 mm.

[0009] Optionally, the battery cell further has a second direction perpendicular to the first direction, the sealing portion includes a first vertical segment extending along the first direction and a horizontal segment extending along the second direction, one end of the first vertical segment is connected to the main body portion, and the other end of the first vertical segment is connected to the horizontal segment; the bent segment is connected to the end of the horizontal segment away from the first vertical segment, and the extension segment extends along the second direction in a direction away from the first vertical segment.

[0010] Optionally, the battery further includes an electrical connector, wherein the circuit board is disposed between the main body and the extension section along the first direction, the electrical connector is disposed between the extension section and the circuit board, one side of the electrical connector is electrically connected to the circuit board, and the other side of the electrical connector is electrically connected to the extension section.

[0011] Optionally, the battery cell further has a second direction perpendicular to the first direction, and the sealing portion includes a first vertical segment extending along the first direction, a horizontal segment extending along the second direction, and a second vertical segment extending along the first direction; One end of the first vertical segment is connected to the main body, the horizontal segment is connected to the other end of the first vertical segment, one end of the second vertical segment is connected to the end of the horizontal segment away from the first vertical segment, and the other end of the second vertical segment extends toward the main body; the bent segment is connected to the other end of the second vertical segment, and the extended segment extends along the first direction toward the direction closer to the main body. Optionally, the battery further includes an electrical connector. Along the second direction, the circuit board is disposed between the first vertical section and the extension section, the electrical connector is disposed between the circuit board and the extension section, one side of the electrical connector is electrically connected to the circuit board, and the other side of the electrical connector is electrically connected to the extension section.

[0012] Optionally, the battery further includes an adhesive layer disposed between the main body and the circuit board for bonding the main body and the circuit board.

[0013] Secondly, embodiments of this application provide an electrical device including a battery as described in any of the preceding claims.

[0014] In the embodiments of this application, by providing a bent section and an extension section in the tab, one end of the bent section is connected to the end of the sealing portion away from the main body, and the other end of the bent section extends obliquely towards the receiving cavity and is connected to the extension section. The extension section is electrically connected to the circuit board. In this way, when the tab is subjected to external force, the deformation of the bent section can be used to disperse part of the force, reducing the risk of the tab breaking easily due to local stress concentration, improving the reliability of the tab connection, and thus ensuring the safety and reliability of battery operation. At the same time, by using the main body and the sealing portion to form a receiving cavity, the circuit board is placed in the receiving cavity. This can make reasonable use of the sealing space at the top of the battery, thereby reducing the internal space of the battery required to install the circuit board, and thus improving the energy density of the battery.

[0015] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a first structure of a battery according to an embodiment of this application; Figure 2 This is a schematic diagram of a second structure of a battery according to an embodiment of this application; Figure 3 This is a schematic diagram of a third structure of a battery according to an embodiment of this application; Figure 4 This is a side view of a first structure of a battery according to an embodiment of this application; Figure 5 This is a schematic diagram of a fourth structure of a battery according to an embodiment of this application; Figure 6 This is a side view of a second structure of a battery according to an embodiment of this application.

[0017] Figure label: 10: Battery cell; 11: Main body; 111: Top wall; 12: Edge sealing; 121: First vertical section; 122: Horizontal section; 123: Second vertical section; 13: Receiving cavity; 20: Circuit board; 21: First plane; 30: Electrical connector; 40: Electrode; 41: Bending section; 42: Extension section; 50: Adhesive layer; X: First direction; Y: Second direction. Detailed Implementation

[0018] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated 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 application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The batteries and electrical devices provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0023] like Figure 1 and Figure 2As shown, a battery according to some embodiments of this application includes: a battery cell 10 and a circuit board 20; the height direction of the battery cell 10 is a first direction X; the battery cell 10 includes a main body 11, a sealing edge 12 and a tab 40, the sealing edge 12 is disposed on one side of the main body 11 along the first direction X, and the main body 11 and the sealing edge 12 enclose a receiving cavity 13, and the circuit board 20 is disposed in the receiving cavity 13; the tab 40 extends from the end of the sealing edge 12 away from the main body 11, the tab 40 includes a bent section 41 and an extension section 42, the extension section 42 is electrically connected to the circuit board 20, one end of the bent section 41 is connected to the end of the sealing edge 12 away from the main body 11, and the other end of the bent section 41 extends obliquely toward the receiving cavity 13 and is connected to the extension section 42.

[0024] In the embodiments of this application, by providing a bent section 41 and an extension section 42 in the tab 40, one end of the bent section 41 is connected to the end of the sealing portion 12 away from the main body portion 11, and the other end of the bent section 41 extends obliquely toward the receiving cavity 13 and is connected to the extension section 42. The extension section 42 is electrically connected to the circuit board 20. In this way, when the tab 40 is subjected to external force, the deformation of the bent section 41 can be used to disperse part of the force, reducing the risk of the tab 40 easily breaking due to local stress concentration, improving the reliability of the tab 40 connection, and thus ensuring the safety and reliability of battery operation. At the same time, by using the main body portion 11 and the sealing portion 12 to enclose and form the receiving cavity 13, the circuit board 20 is placed in the receiving cavity 13. This can make reasonable use of the sealing space at the top of the battery, thereby reducing the internal space of the battery required to set the circuit board 20, thereby improving the energy density of the battery.

[0025] It should be noted that in the battery manufacturing process, the sealing portion 12 needs to be located on one side of the main body 11 of the cell 10 along the first direction X. This is to ensure that the electrolyte in the main body 11 does not leak out, thus avoiding environmental pollution or causing environmental problems. The sealing portion 12 can be connected to the main body 11 by welding processes, such as laser welding, or by structural adhesive. Of course, the connection method between the sealing portion 12 and the main body 11 can be flexibly selected according to actual process requirements, and this application embodiment does not limit it.

[0026] In addition, circuit board 20 is a Protection Circuit Module (PCM). The PCM can monitor the battery's operating status in real time and prevent danger caused by overcharging, over-discharging, overcurrent, short circuit, or abnormal temperature through active control circuitry. Specifically, due to the chemical characteristics of the battery, during normal use, chemical reactions involving the interconversion of electrical and chemical energy occur inside the cell 10. However, under certain conditions, overcharging, over-discharging, and overcurrent can lead to chemical side reactions inside the cell 10. If these side reactions intensify, they can severely affect the battery's performance and lifespan, and may generate a large amount of gas. These gases can cause a rapid increase in pressure inside the cell 10, potentially leading to explosions and other safety issues. The PCM has a protective function and is used to effectively monitor the battery's charging and discharging status, and under certain conditions, shut down the charging and discharging circuits to prevent damage to the battery.

[0027] In some embodiments, such as Figure 1 and Figure 2 As shown, the circuit board 20 has a first plane 21 on the side facing the extension section 42. Along the direction perpendicular to the first plane 21, the distance from the end of the sealing part 12 away from the main body part 11 to the first plane 21 is D1, and the distance from the end of the bent section 41 connected to the extension section 42 to the first plane 21 is D2, satisfying: 0.1mm≤D1-D2≤0.8mm.

[0028] In this embodiment, by controlling the range of the difference between the distance D1 from the end of the sealing portion 12 away from the main body portion 11 to the first plane 21 and the distance D2 from the end of the bent section 41 connected to the extension section 42 to the first plane 21, that is, by controlling the height difference between the two ends of the bent section 41, on the one hand, the height difference is controlled to be greater than or equal to 0.1mm, so that the tab 40 bends into the receiving cavity 13 after being led out from the sealing portion 12. Thus, during use, the external force on the tab 40 can be dispersed by the bent section 41, avoiding stress concentration on the tab 40 and reducing the risk of the tab 40 breaking. On the other hand, the height difference is controlled to be less than or equal to 0.8mm, so that the tab 40 can avoid occupying too much space in the receiving cavity 13, thus affecting the arrangement of other structural components such as the circuit board 20 in the receiving cavity 13.

[0029] It should be noted that, as Figure 1 As shown, the first plane 21 is the surface of the circuit board 20 facing away from the main body 11 along the first direction X, and the direction perpendicular to the first plane 21 is the first direction X; as Figure 2 As shown, the first plane 21 is the surface of the circuit board 20 facing the extension section 42 along the second direction Y, and the direction perpendicular to the first plane 21 is the second direction Y.

[0030] For example, the difference between D1 and D2 can be set to any value such as 0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.8mm, or a range between any two values.

[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, the angle θ between the bent section 41 and the extended section 42 satisfies: 105°≤θ≤165°.

[0032] In this embodiment, by making the included angle θ between the bent section 41 and the extension section 42 greater than or equal to 105°, it is possible to avoid the angle at the connection position of the bent section 41 and the extension section 42 being too small, which would lead to a greater concentration of stress at that position, making the tab 40 prone to breakage at the connection position of the bent section 41 and the extension section 42 when subjected to external force. At the same time, by making the included angle θ between the bent section 41 and the extension section 42 less than or equal to 165°, it is possible to avoid the bent section 41 being unable to effectively disperse the stress on the tab 40, thereby reducing the risk of the tab 40 breaking under the action of external force.

[0033] It should be noted that the surface of the bent section 41 facing away from the main body 11 along the first direction X is the first surface, and the surface of the extended section 42 facing away from the main body 11 along the first direction X is the second surface. The connection between the first surface and the second surface forms an included angle θ.

[0034] For example, the included angle θ can be set to any angle or a range between any two angles, such as 105°, 120°, 135°, 150°, 165°.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, the main body 11 has a top wall 111 on the side facing the edge sealing part 12. The edge sealing part 12 is connected to the top wall 111 and surrounds the top wall 111 to form a receiving cavity 13. Along the first direction X, the distance between the end face of the edge sealing part 12 away from the main body 11 and the top wall 111 is D3, which satisfies: D3≤2 mm.

[0036] In this embodiment, by setting the distance D3 between the end face of the sealing portion 12 away from the main body 11 and the top wall 111 to less than or equal to 2mm, it not only allows a certain receiving cavity 13 to be formed between the sealing portion 12 and the main body 11, so that other structural components such as the circuit board 20 can be arranged in the receiving cavity 13, but also avoids the distance D3 from being too large, so that D3 is controlled to be less than or equal to 2mm, thereby reducing the thickness of the battery head along the first direction X, which is composed of the sealing portion 12, the tab 40 and the circuit board 20, etc., thereby greatly reducing the space occupied by the battery head along the first direction X and improving the energy density of the battery.

[0037] For example, D3 can be set to any value such as 0.4mm, 0.8mm, 1.2mm, 1.6mm, 2mm, or a range between any two values.

[0038] In some embodiments, such as Figure 1 As shown, the battery cell 10 also has a second direction Y perpendicular to the first direction X. The sealing portion 12 includes a first vertical segment 121 extending along the first direction X and a horizontal segment 122 extending along the second direction Y. One end of the first vertical segment 121 is connected to the main body portion 11, and the other end of the first vertical segment 121 is connected to the horizontal segment 122. The bent segment 41 is connected to the end of the horizontal segment 122 away from the first vertical segment 121, and the extension segment 42 extends along the second direction Y in a direction away from the first vertical segment 121.

[0039] In this embodiment, by providing a first vertical segment 121 extending along the first direction X and a horizontal segment 122 extending along the second direction Y in the sealing portion 12, one end of the first vertical segment 121 is connected to the main body portion 11, and the other end of the first vertical segment 121 is connected to the horizontal segment 122. This allows the first vertical segment 121 and the horizontal segment 122 to protect the circuit board 20 placed in the receiving cavity 13, preventing damage to the protective plate from external forces. Simultaneously, the extension segment 42 extends along the second direction Y in a direction away from the first vertical segment 121. Thus, as... Figure 1 As shown, the circuit board 20 can be placed horizontally in the receiving cavity 13, which facilitates the connection between the extension 42 of the tab 40 and the circuit board 20.

[0040] It should be noted that for a rectangular circuit board having two wide surfaces arranged opposite each other along the first direction X and four narrow surfaces arranged sequentially around the first direction X, the circuit board 20 is connected to the main body 11 along one wide surface along the first direction X, and the circuit board 20 is connected to the extension section 42 along the other wide surface along the first direction X.

[0041] In addition, the included angle at the connection between the first vertical segment 121 and the horizontal segment 122 can be set as a right angle, which can enhance the strength of the sealing part 12 and improve its resistance to deformation. When the battery is subjected to external pressure or impact, the right angle between the first vertical segment 121 and the horizontal segment 122 can make the sealing part 12 have a more stable structure. The included angle at the connection between the first vertical segment 121 and the horizontal segment 122 can also be set as an approximate right angle. For example, the included angle can be 80°, 82°, 84°, 86° or 88°, etc. Of course, the specific value of the included angle at the connection between the first vertical segment 121 and the horizontal segment 122 can be flexibly set according to actual needs, and the embodiments of this application do not limit it.

[0042] In some embodiments, such as Figure 1 and Figure 4 As shown, the battery also includes an electrical connector 30. The circuit board 20 is disposed between the main body 11 and the extension section 42 along the first direction X. The electrical connector 30 is disposed between the extension section 42 and the circuit board 20. One side of the electrical connector 30 is electrically connected to the circuit board 20, and the other side of the electrical connector 30 is electrically connected to the extension section 42.

[0043] In this embodiment, by placing the circuit board 20 between the main body 11 and the extension 42, and the electrical connector 30 between the extension 42 and the circuit board 20, one side of the electrical connector 30 is electrically connected to the circuit board 20, and the other side of the electrical connector 30 is connected to the extension 42. In this way, the circuit board 20 and the electrical connector 30 are placed sequentially in the receiving cavity 13 along the first direction, which not only facilitates connection, but also reduces the space occupied by the electrical connector 30 and the circuit board 20 in the receiving cavity 13, thereby improving the compactness of the internal structure of the battery.

[0044] In some embodiments, such as Figure 3 As shown, the electrical connector 30 extends at least partially along the first direction X and covers the side of the circuit board 20 away from the sealing edge 12.

[0045] In this embodiment, by extending the electrical connector 30 at least partially along the first direction X to cover the side of the circuit board 20 away from the sealing edge 12, the electrical connector 30 on the end face of the circuit board 20 away from the main body 11 can be connected to the tab 40. At the same time, the electrical connector 30 on the end face of the circuit board 20 away from the sealing edge 12 can be connected to the circuit board 20. This not only makes full use of the space of the receiving cavity 13, but also improves the stability and reliability of the connection between the electrical connector 30 and the circuit board 20.

[0046] It should be noted that the end face of the circuit board 20 that is positioned opposite to the first direction X is a wide face, and the end face that is positioned opposite to the second direction Y is a narrow face. The wide face is opposite to the main body 11, and the narrow face is opposite to the first vertical section 121 of the sealing edge 12. The circuit board 20 is placed in the receiving cavity 13 in this way, which can reduce the space occupied by the head of the battery in the first direction X.

[0047] In some embodiments, such as Figure 2As shown, the battery cell 10 also has a second direction Y perpendicular to the first direction X. The sealing portion 12 includes a first vertical segment 121 extending along the first direction X, a horizontal segment 122 extending along the second direction Y, and a second vertical segment 123 extending along the first direction X. One end of the first vertical segment 121 is connected to the main body portion 11, the horizontal segment 122 is connected to the other end of the first vertical segment 121, one end of the second vertical segment 123 is connected to the end of the horizontal segment 122 away from the first vertical segment 121, and the other end of the second vertical segment 123 extends toward the main body portion 11. The bent segment 41 is connected to the other end of the second vertical segment 123, and the extension segment 42 extends along the first direction X toward the direction close to the main body portion 11.

[0048] In this embodiment, by providing a first vertical segment 121 extending along the first direction X, a horizontal segment 122 extending along the second direction Y, and a second vertical segment 123 extending along the first direction X in the sealing portion 12, one end of the first vertical segment 121 is connected to the main body portion 11, the horizontal segment 122 is connected between the first vertical segment 121 and the second vertical segment 123, and the end of the second vertical segment 123 away from the horizontal segment 122 extends towards the main body portion 11, thus the first vertical segment 121, the horizontal segment 122, and the second vertical segment 123 can protect the circuit board 20 placed in the receiving cavity 13, preventing damage to the protective plate from external forces; simultaneously, the extension segment 42 extends along the first direction X towards the direction close to the main body portion 11, thus, as Figure 2 As shown, placing the circuit board 20 vertically inside the receiving cavity 13 facilitates the connection between the extension 42 of the tab 40 and the circuit board 20.

[0049] It should be noted that for a rectangular circuit board having two narrow surfaces arranged opposite each other along the first direction X and two wide surfaces arranged opposite each other along the second direction Y, the circuit board 20 is connected to the main body 11 along one narrow surface along the first direction X, and the circuit board 20 is connected to the extension section 42 along one wide surface along the second direction Y.

[0050] In some embodiments, such as Figure 2 and Figure 6 As shown, the battery also includes an electrical connector 30. Along the second direction Y, the circuit board 20 is disposed between the first vertical section 121 and the extension section 42, and the electrical connector 30 is disposed between the circuit board 20 and the extension section 42. One side of the electrical connector 30 is electrically connected to the circuit board 20, and the other side of the electrical connector 30 is electrically connected to the extension section 42.

[0051] In this embodiment, by placing the circuit board 20 between the first vertical section 121 and the extension section 42, and the electrical connector 30 between the extension section 42 and the circuit board 20, one side of the electrical connector 30 is electrically connected to the circuit board 20, and the other side of the electrical connector 30 is connected to the extension section 42. In this way, the circuit board 20 and the electrical connector 30 are placed sequentially in the receiving cavity 13 along the second direction Y, which not only facilitates connection, but also reduces the space occupied by the electrical connector 30 and the circuit board 20 in the receiving cavity 13, thereby improving the compactness of the internal structure of the battery.

[0052] In some embodiments, such as Figure 5 As shown, the electrical connector 30 extends at least partially along the second direction Y and covers the side of the circuit board 20 away from the main body 11.

[0053] In this embodiment, by extending the electrical connector 30 at least partially along the second direction Y to cover the side of the circuit board 20 away from the main body 11, the electrical connector 30 on the end face of the circuit board 20 away from the sealing edge 12 can be connected to the tab 40. At the same time, the electrical connector 30 on the end face of the circuit board 20 away from the main body 11 can be connected to the circuit board 20. This not only makes full use of the space of the receiving cavity 13, but also improves the stability and reliability of the connection between the electrical connector 30 and the circuit board 20.

[0054] It should also be noted that the electrical connector 30 can be made of either nickel or copper, as long as it can transmit current. Nickel sheets have strong corrosion resistance and are easy to weld, while copper sheets have high conductivity and are suitable for high-current batteries. Of course, the specific type of electrical connector 30 can be flexibly selected according to actual process requirements, and this application embodiment does not limit it.

[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery also includes an adhesive layer 50, which is disposed between the main body 11 and the circuit board 20 for bonding the main body 11 and the circuit board 20.

[0056] In this embodiment, an adhesive layer 50 is provided between the main body 11 and the circuit board 20 to connect the main body 11 and the circuit board 20. This not only makes operation convenient but also ensures a firm connection, thereby improving the reliability of battery operation.

[0057] It should be noted that the adhesive layer 50 can be double-sided tape or structural adhesive. Double-sided tape has better flatness, which can further improve the connection between the main body 11 and the circuit board 20; structural adhesive has good bonding effect and low cost. Of course, the specific type of adhesive layer 50 can be flexibly selected according to actual process requirements, and this embodiment does not limit it.

[0058] In some embodiments, the connection between the bent section 41 and the extension section 42 is provided as an arc transition section.

[0059] In this embodiment, by setting the connection between the bent section 41 and the extension section 42 as an arc transition section, the connection between the bent section 41 and the extension section 42 can be made smoother, avoiding stress concentration at the connection point, which would make the tab 40 prone to breakage at that location.

[0060] Optionally, embodiments of this application also propose an electrical device, including a battery as described in the above embodiments.

[0061] It should be noted that the electrical devices in this application embodiment can be mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc., and the batteries provide power to these electrical devices.

[0062] In the embodiments of this application, by providing a bent section 41 and an extension section 42 in the tab 40, one end of the bent section 41 is connected to the end of the sealing portion 12 away from the main body portion 11, and the other end of the bent section 41 extends obliquely toward the receiving cavity 13 and is connected to the extension section 42. The extension section 42 is electrically connected to the circuit board 20. In this way, when the tab 40 is subjected to external force, the deformation of the bent section 41 can be used to disperse part of the force, reducing the risk of the tab 40 easily breaking due to local stress concentration, improving the reliability of the tab 40 connection, and thus ensuring the safety and reliability of battery operation. At the same time, by using the main body portion 11 and the sealing portion 12 to enclose and form the receiving cavity 13, the circuit board 20 is placed in the receiving cavity 13. This can make reasonable use of the sealing space at the top of the battery, thereby reducing the internal space of the battery required to set the circuit board 20, thereby improving the energy density of the battery.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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.

[0064] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, characterized by, The application relates to a battery cell (10) and a circuit board (20). The height direction of the battery cell (10) is a first direction (X); the battery cell (10) comprises a main body part (11), an edge sealing part (12) and a tab (40), the edge sealing part (12) is arranged on one side of the main body part (11) along the first direction (X), a containing cavity (13) is formed between the main body part (11) and the edge sealing part (12), and the circuit board (20) is arranged in the containing cavity (13). The tab (40) is led out from one end of the edge sealing part (12) away from the main body part (11), the tab (40) comprises a bending section (41) and an extension section (42), the extension section (42) is electrically connected with the circuit board (20), one end of the bending section (41) is connected with one end of the edge sealing part (12) away from the main body part (11), and the other end of the bending section (41) is inclinedly extended towards the containing cavity (13) and connected with the extension section (42). One side of the circuit board (20) towards the extension section (42) is provided with a first plane (21), in a direction perpendicular to the first plane (21), the distance from one end of the edge sealing part (12) away from the main body part (11) to the first plane (21) is D1, the distance from one end of the bending section (41) connected with the extension section (42) to the first plane (21) is D2, and the following condition is met: 0.1mm<=D1-D2<=0.8mm.

2. The battery of claim 1, wherein, An included angle (theta) is formed between the bending section (41) and the extension section (42), and the following condition is met: 105<=theta<=165.

3. The battery of claim 1, wherein, One side of the main body part (11) towards the edge sealing part (12) is provided with a top wall (111), the edge sealing part (12) is connected with the top wall (111) and forms the containing cavity (13) together with the top wall (111); in the first direction (X), the distance between one side end surface of the edge sealing part (12) away from the main body part (11) and the top wall (111) is D3, and the following condition is met: D3<=2mm.

4. The battery of claim 1, wherein, The battery cell (10) further has a second direction (Y) perpendicular to the first direction (X), the edge sealing part (12) comprises a first vertical section (121) extending along the first direction (X) and a horizontal section (122) extending along the second direction (Y), one end of the first vertical section (121) is connected with the main body part (11), the other end of the first vertical section (121) is connected with the horizontal section (122); the bending section (41) is connected with one end of the horizontal section (122) away from the first vertical section (121), and the extension section (42) extends along the second direction (Y) towards a direction away from the first vertical section (121).

5. The battery according to any one of claims 1 to 4, characterized in that, ​ 6. The battery of claim 5, wherein, The battery further comprises an electrical connecting member (30), the circuit board (20) is arranged between the main body portion (11) and the extension section (42) along the first direction (X), the electrical connecting member (30) is arranged between the extension section (42) and the circuit board (20), one side of the electrical connecting member (30) is electrically connected with the circuit board (20), and the other side of the electrical connecting member (30) is electrically connected with the extension section (42).

7. The battery according to any one of claims 1 to 4, wherein The battery further comprises an electrical connecting member (30), the circuit board (20) is arranged between the main body portion (11) and the extension section (42) along the first direction (X), the electrical connecting member (30) is arranged between the extension section (42) and the circuit board (20), one side of the electrical connecting member (30) is electrically connected with the circuit board (20), and the other side of the electrical connecting member (30) is electrically connected with the extension section (42). The first vertical section (121) is connected with the main body portion (11) at one end, the horizontal section (122) is connected with the other end of the first vertical section (121), one end of the second vertical section (123) is connected with the end of the horizontal section (122) away from the first vertical section (121), and the other end of the second vertical section (123) extends towards the main body portion (11); the bending section (41) is connected with the other end of the second vertical section (123), and the extension section (42) extends towards the main body portion (11) along the first direction (X).

8. The battery of claim 7, wherein, The battery further comprises an electrical connecting member (30), the circuit board (20) is arranged between the main body portion (11) and the extension section (42) along the first direction (X), the electrical connecting member (30) is arranged between the extension section (42) and the circuit board (20), one side of the electrical connecting member (30) is electrically connected with the circuit board (20), and the other side of the electrical connecting member (30) is electrically connected with the extension section (42).

9. The battery of claim 1, wherein, The battery further comprises a sticking layer (50) arranged between the main body portion (11) and the circuit board (20) for sticking the main body portion (11) and the circuit board (20).

10. An electric device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 9.

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