Battery, electronic device, and method for manufacturing a battery

Abstract

The present invention discloses a battery, a manufacturing method of the battery and an electronic device. The battery includes: at least one battery cell, each battery cell respectively having at least two tabs, each battery cell respectively having a top sealing edge, at least two windows being provided on the top sealing edge, and the tabs being respectively received in a corresponding one of the windows; a protection board, at least two welding parts being provided on the protection board, the welding parts being respectively located in a corresponding one of the windows, the welding parts on the protection board being respectively connected to the corresponding tabs, and the protection board being attached to the top sealing edge. The battery of the present invention can reduce the overall size of the battery. Under the condition of a fixed battery size, the size of the battery cell can be increased, thereby increasing the capacity of the battery. At the same time, by attaching the protection board to the top sealing edge of the battery cell, the internal winding core can be effectively prevented from moving. During the fall of the whole machine, the risk of the internal winding core of the battery leaking liquid due to breaking through the top sealing edge can be reduced, and the safety of the battery can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery manufacturing, and particularly relates to a battery, an electronic device, and a manufacturing method of the battery. Background Art

[0002] The battery core and the protection board are the two main components of the battery. Among them, the top sealing size of the battery core is usually about 2.0 - 3.0 mm, and the width size of the protection board is usually about 3.5 - 7.5 mm. The size of the protection board is much larger than the size of the top sealing edge.

[0003] In the prior art, the tabs of the battery core usually extend out of the top sealing edge of the battery core. After the nickel sheets of the protection board are connected and bent with the tabs, a large part of the edge of the protection board will extend beyond the top sealing edge of the battery core, resulting in waste of the overall size of the battery and reduction of the battery capacity in a fixed mobile phone compartment. Summary of the Invention

[0004] The present invention aims to provide a battery and a manufacturing method thereof, which can at least solve the problems in the prior art that after the protection board is connected and bent with the tabs, a large part of the protection board will extend beyond the top sealing edge of the battery core, resulting in waste of the overall size of the battery and reduction of the battery capacity in a limited space.

[0005] In order to solve the above technical problems, the present invention is implemented as follows:

[0006] In a first aspect, the present invention provides a battery, comprising:

[0007] At least one battery core, each of the battery cores respectively having at least two tabs, each of the battery cores respectively having a top sealing edge, at least two windows corresponding to the tabs are provided on the top sealing edge, the tabs are respectively accommodated in the corresponding windows, and the tabs do not exceed the top sealing edge;

[0008] A protection board, at least two welding parts are provided on the protection board, the positions of the welding parts correspond to the positions of the windows, the protection board is connected with the tabs through the welding parts, and the protection board is attached to the top sealing edge.

[0009] In a second aspect, the present invention provides a manufacturing method of a battery for manufacturing the battery described in the above embodiment, and the manufacturing method comprises:

[0010] Cutting the tabs on a part of the battery core so that the tabs do not exceed the top sealing edge;

[0011] Connecting the welding parts on the protection board with the corresponding tabs;

[0012] Inserting into the corresponding windows and connecting the welding parts with the corresponding tabs;

[0013] Bend the welded part and the tab after connection so that the protection board fits against the top sealing edge.

[0014] In a third aspect, an electronic device is provided, including the battery described in the above embodiments.

[0015] In the present invention, by providing a window in the top sealing edge, the tab extending beyond the top sealing edge is cut off, so that the tab is located within the window, and the welded part on the protection board can extend into the window to be connected to the corresponding tab. After the welded part is connected to the tab, by bending, it is ensured that the protection board fits against the top sealing edge. By providing a window in the top sealing edge, the present invention makes full use of the internal space of the top sealing edge. After the welded part of the protection board is connected to the tab, the protection board can be bent to be close to the top sealing edge, ensuring that the protection board does not exceed the top sealing edge as much as possible, reducing the overall size of the battery. Under the condition of a fixed battery size, the size of the battery core can be increased, thereby increasing the battery capacity. At the same time, by attaching the protection board to the top sealing edge of the battery core, the internal wound core can be effectively prevented from moving. During the fall of the whole machine, the risk of the internal wound core of the battery causing liquid leakage due to breaking through the top sealing edge can be reduced, improving the safety of the battery.

[0016] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0018] Figure 1 is a schematic diagram before the tab of the battery according to Embodiment 1 of the present invention is cut;

[0019] Figure 2 is a schematic diagram after the tab of the battery according to Embodiment 1 of the present invention is cut;

[0020] Figure 3 is a schematic diagram of window opening of the battery according to Embodiment 1 of the present invention;

[0021] Figure 4 is a schematic diagram before the protection board of the battery according to Embodiment 1 of the present invention is welded to the battery core;

[0022] Figure 5 is a schematic diagram after the protection board of the battery according to Embodiment 1 of the present invention is welded to the battery core;

[0023] Figure 6 is a schematic diagram of bending after the protection board of the battery according to Embodiment 1 of the present invention is welded to the battery core;

[0024] Figure 7It is a schematic diagram of the window opening of the battery cell according to Embodiment 2 of the present invention;

[0025] Figure 8 It is a schematic diagram of the battery before the tab is cut according to Embodiment 2 of the present invention;

[0026] Figure 9 It is a schematic diagram of the battery after the tab is cut according to Embodiment 2 of the present invention;

[0027] Figure 10 It is a schematic diagram of the window opening of the battery according to Embodiment 3 of the present invention;

[0028] Figure 11 It is a schematic diagram of the protection board of the battery according to Embodiment 3 of the present invention;

[0029] Figure 12 It is a schematic diagram of the window opening of the battery according to Embodiment 4 of the present invention;

[0030] Figure 13 It is a schematic diagram of the window opening of the battery according to Embodiment 5 of the present invention.

[0031] Reference numerals:

[0032] Battery cell 10; tab 11; top sealing edge 12; window 13;

[0033] Protection board 20; welding part 21. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0035] In the description and claims of the present invention, features related to the terms "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0036] In the description of the present invention, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are involved, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" involved should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The battery provided by the embodiment of the present invention will be described in detail below with reference to the drawings through specific embodiments and their application scenarios.

[0039] As Figures 1 to 6 shown, the battery according to the embodiment of the present invention includes at least one battery cell 10 and a protection board 20.

[0040] Specifically, each battery cell 10 respectively has at least two tabs 11, each battery cell 10 respectively has a top sealing edge 12, the top sealing edge 12 is provided with at least two windows 13 corresponding to the tabs 11, and the tabs 11 are respectively received in the corresponding windows 13. The protection board 20 is provided with at least two welding parts 21, the positions of the welding parts 21 correspond to the positions of the windows 13, the protection board 20 is connected to the tabs 11 through the welding parts 21, and the protection board 20 is attached to the top sealing edge 12.

[0041] In other words, referring to Figures 1 to 6 , the battery according to the embodiment of the present invention mainly consists of at least one battery cell 10 and a protection board 20. Among them, each battery cell 10 respectively has at least two tabs 11 (refer to Figure 1 and Figure 8 ), at least one of the at least two tabs 11 is a positive tab, and at least one is a negative tab. Each battery cell 10 respectively has a top sealing edge 12, and the top sealing edge 12 can be coated with an aluminum-plastic film. At least two windows 13 are provided on the top sealing edge 12 (such as Figure 3 , Figure 9 , Figure 10 ,Figure 12 and Figure 13 ), the number of windows 13 corresponds to the number of tabs 11. Each tab 11 is formed by cutting off a part located at the top sealing edge 12 (see Figure 1 and Figure 2 ), so that each tab 11 is respectively received in a corresponding window 13.

[0042] At least two welding parts 21 can be provided on the protection plate 20 (see Figure 4 , Figure 5 and Figure 11 ). The number of welding parts 21 corresponds to the number of tabs 11 or windows 13. The welding parts 21 can be made of nickel sheets. Among them, at least one welding part 21 is a positive electrode plate, at least one welding part 21 is a negative electrode plate, and the positive electrode plate corresponds to the positive tab, and the negative electrode plate corresponds to the negative tab; the welding parts can also be other filamentous or columnar metal parts. Each welding part 21 is respectively located in a corresponding window 13, and each welding part 21 on the protection plate 20 is respectively connected to the corresponding tab 11 (see Figure 5 ). After the welding part 21 is connected to the tab 11, the protection plate 20 and the tab 11 are bent (see Figure 6 ), so that the protection plate 20 can be attached to the top sealing edge 12, ensuring that the protection plate 20 does not protrude beyond the top sealing edge 12 as much as possible, reducing the overall size of the battery. Under the condition of a fixed battery size, the size of the battery core 10 can be increased, thereby increasing the capacity of the battery.

[0043] At the same time, by attaching the protection plate 20 to the top sealing edge 12 of the battery core 10, the internal winding core can be effectively prevented from moving. During the whole machine drop, the risk of the internal winding core of the battery breaking through the top sealing edge 12 and causing liquid leakage can be reduced, and the safety of the battery can be improved.

[0044] It should be noted that there are two key parameters related to the capacity of the battery. One is the energy density, and the other is the volume of the battery core 10. The improvement of the energy density of the battery has entered a bottleneck period, and the available space for improving the energy density is currently less than 1%. Therefore, in order to increase the capacity of the battery, only the volume of the battery core 10 can be increased to meet the requirements. However, the space inside the electronic device is very limited. Therefore, it is necessary to save the space of the battery as much as possible and reserve more dimensions for the battery core 10 in the limited space to increase the capacity of the battery.

[0045] At present, the protection board 20 of the battery can utilize the size of the top sealing edge 12 of a part of the battery cells 10 (the size of the top sealing edge 12 is generally 2.0 - 3.0 mm). However, the width size of the protection board 20 is generally about 3.5 - 7.5 mm, which is much larger than the size of the top sealing edge 12 of the battery cells 10. Therefore, after the protection board 20 is bent, a large part of the edge of the protection board 20 will extend beyond the top sealing edge 12 of the battery cells 10, resulting in waste of the length size of the battery. In the limited space of an electronic device (taking a mobile phone as an example), the capacity of the battery will be reduced. Especially for high-power fast charging projects, due to more circuit protection devices and a large overcurrent of the protection board 20, the width size of the protection board 20 is large, and thus the lost battery capacity is also greater.

[0046] On the other hand, in order to increase the capacity of the battery in the prior art, the thickness of the battery cells 10 is usually increased, generally with a thickness of more than 4.5 mm. During the dropping process of the electronic device (mobile phone), the winding core inside the battery cells 10 is prone to move forward, resulting in the battery cells 10 breaking through the top sealing edge 12, causing battery leakage, and even safety problems such as fire.

[0047] In the present invention, by optimizing the battery structure, a part of the tab 11 located at the top sealing edge 12 is cut off, and a window design is carried out on the top sealing edge 12. The welding part 21 of the protection board 20 is extended into the window 13 to be connected with the tab 11, thereby utilizing the structural space of the top sealing edge 12, reducing the capacity loss caused by the over-wide protection board 20. In addition, the protection board 20 is used as the top sealing retaining wall of the battery cells 10 to slow down the forward movement of the battery during the dropping process and improve the dropping reliability of the battery.

[0048] Thus, for the battery according to the embodiment of the present invention, by providing the window 13 on the top sealing edge 12, the tab 11 extending beyond the top sealing edge 12 is cut off, so that the tab 11 is located inside the window 13. The welding part 21 on the protection board 20 can be extended into the window 13 to be connected with the corresponding tab 11. After the welding part 21 is connected with the tab 11, by bending, it is ensured that the protection board 20 is attached to the top sealing edge 12. By providing the window 13 on the top sealing edge 12, the internal space of the top sealing edge 12 is fully utilized. After the welding part 21 of the protection board 20 is connected with the tab 11, the protection board 20 can be bent to be close to the top sealing edge 12, ensuring that the protection board 20 does not extend beyond the top sealing edge 12 as much as possible, reducing the overall size of the battery. Under the condition of a fixed battery size, the size of the battery cells 10 can be increased, thereby increasing the capacity of the battery. At the same time, by attaching the protection board 20 to the top sealing edge 12 of the battery cells 10, the internal winding core can be effectively prevented from moving. During the dropping process of the whole machine, the risk of battery leakage caused by the internal winding core of the battery breaking through the top sealing edge 12 can be reduced, and the safety of the battery can be improved.

[0049] In some specific embodiments of the present invention, such as Figure 4 and Figure 5As shown, the welded part 21 can be a pad, and the welded part 21 can be arranged on the side of the protection plate 20 facing the top sealing edge 12. The welded part 21 protrudes from the surface of the protection plate 20 towards the top sealing edge 12 respectively. The orthographic projection of the protection plate 20 on the top sealing edge 12 is located within the top sealing edge 12. Each welded part 21 on the protection plate 20 is respectively welded and connected to the corresponding tab 11 in the battery cell 10. The cross-sectional shape of the window 13 can be square, triangular or circular (such as Figure 3 , Figure 7 , Figure 9 , Figure 10 Figure 12 and Figure 13 shown). Of course, the shape of the window 13 is not limited to rectangular or square, and can also be any other shape, such as arc, triangle, polygon, etc.

[0050] For the battery of the present invention, by opening a window at the position of the top sealing edge 12, inserting the welded part 21 into the window 13, and welding the welded part 21 to the tab 11, and after connection, by bending, see Figure 6 , the protection plate 20 can be attached to the top sealing edge 12 (the width of the protection plate 20 is much larger than its thickness dimension), which can make the protection plate 20 make more full use of the size of the top sealing edge 12 of the battery cell 10, so as to reduce the size of the battery or increase the size of the battery cell 10 under the fixed battery size, and then increase the capacity of the battery. The size of the top sealing edge 12 of the battery is generally 2.0 - 3.0 mm, and the width dimension of the protection plate 20 is generally about 3.5 - 7.5 mm, both of which are much larger than the size of the top sealing edge 12 of the battery cell 10. Therefore, by adopting the design scheme of the present invention, a length dimension of 0.5 - 5.0 mm can be saved, and the converted battery capacity is increased by about 0.7% - 3%. Moreover, the wider the protection plate 20 of the battery, the greater the benefit.

[0051] At the same time, in terms of the reliability of the battery, during the drop test of the whole machine, since a retaining wall (the erected protection plate 20) with a width of 3.5 - 7.5 mm is added in front of the core of the battery cell 10, the movement of the core can be greatly alleviated, thus solving the problem of liquid leakage caused by the core breaking through the top seal, and the safety of the battery is significantly improved by more than 50%.

[0052] According to an embodiment of the present invention, such as Figures 1 to 9As shown, the number of battery cells 10 is one, and the battery cell 10 has two tabs 11, one of which is a positive tab and the other is a negative tab. The top sealing edge 12 is provided with two windows 13, and the protection board 20 is provided with two welding parts 21. One of the welding parts 21 is welded to the positive tab, and the other welding part 21 is welded to the negative tab, which can save the length dimension of the battery by 0.5 - 5.0 mm and effectively improve the battery capacity. At the same time, in terms of the reliability of the battery, during the drop test of the whole machine, since a retaining wall (the erected protection board 20) with a thickness of 3.5 - 7.5 mm is added in front of the core of the battery cell 10, the movement of the core can be greatly alleviated, thus solving the problem of liquid leakage caused by the core breaking through the top seal, and the safety of the battery is significantly improved by more than 50%.

[0053] Optionally, the number of battery cells 10 is one, and the battery cell 10 has at least three tabs 11. The top sealing edge 12 is provided with at least three windows 13, and the protection board 20 is provided with at least three welding parts 21.

[0054] That is to say, the battery cell 10 can have at least three tabs 11. For example, for a battery with three tabs 11, by adopting the design scheme of the present invention, the overall occupied space of the battery can be effectively reduced, the size of the battery cell 10 can be increased, and the capacity and safety of the battery can be improved.

[0055] According to an embodiment of the present invention, as Figure 10 shown, the number of battery cells 10 is multiple, and the multiple battery cells 10 are arranged in a row. Each battery cell 10 has at least two tabs 11 respectively. Each top sealing edge 12 is provided with at least two windows 13. The number of welding parts 21 on the protection board 20 corresponds to the number of tabs 11 on the multiple battery cells 10. Each welding part 21 on the protection board 20 is respectively connected to the corresponding tab 11 of each battery cell 10, and the protection board 20 is attached to the top sealing edge 12 of each battery cell 10. By adopting the design scheme of the present invention, the overall occupied space of the battery can be effectively reduced, the size of the battery cell 10 can be increased, and the capacity and safety of the battery can be improved.

[0056] In the present invention, when the aluminum-plastic sealing film of the battery cell 10 is formed, two windows 13 can also be opened at the position of the top sealing edge 12 of the aluminum-plastic sealing film to reserve for the tabs 11 of the battery cell 10 to leak out. The aluminum-plastic film is made into the battery cell 10, and the tabs 11 of the battery cell 10 are leaked out from the windows 13 of the aluminum-plastic film, and the redundant part of the aluminum-plastic film is cut off. Then, each welding part 21 on the protection board 20 is respectively connected to the corresponding tab 11 of each battery cell 10 through the window 13, and the protection board 20 is attached to the top sealing edge 12 of each battery cell 10, effectively reducing the overall occupied space of the battery, increasing the size of the battery cell 10, and improving the capacity and safety of the battery.

[0057] Of course, for those skilled in the art, other structures of the battery and their working principles are understandable and achievable, and will not be elaborated in detail in the present invention.

[0058] In summary, for the battery according to the embodiment of the present invention, by providing a window 13 on the top sealing edge 12, the tab 11 extending beyond the top sealing edge 12 is cut off, so that the tab 11 is located within the window 13. The welding member 21 on the protection plate 20 can extend into the window 13 to be connected to the corresponding tab 11. After the welding member 21 is connected to the tab 11, by bending, it is ensured that the protection plate 20 is in close contact with the top sealing edge 12. By providing the window 13 on the top sealing edge 12, the present invention makes full use of the internal space of the top sealing edge 12. After the welding member 21 on the protection plate 20 is connected to the tab 11, the protection plate 20 can be bent to be close to the top sealing edge 12, ensuring that the protection plate 20 does not extend beyond the top sealing edge 12 as much as possible, reducing the overall size of the battery. Under the condition of a fixed battery size, the size of the battery core 10 can be increased, thereby increasing the capacity of the battery. At the same time, by attaching the protection plate 20 to the top sealing edge 12 of the battery core 10, the internal wound core can be effectively prevented from moving. During the drop of the whole machine, the risk of leakage caused by the internal wound core breaking through the top sealing edge 12 can be reduced, improving the safety of the battery.

[0059] According to a second aspect of the present invention, there is provided a method for manufacturing a battery for manufacturing the battery in the above embodiment. The manufacturing method includes:

[0060] Cut the tab 11 on a part of the battery core 10 so that the tab 11 does not exceed the top sealing edge 12;

[0061] Connect the welding member 21 on the protection plate 20 to the corresponding tab 11;

[0062] Bend the connected welding member 21 and tab 11 so that the protection plate 20 is in close contact with the top sealing edge 12.

[0063] In other words, as Figures 1 to 6 shown, the method for manufacturing a battery according to the embodiment of the present invention is mainly used to manufacture the battery in the above embodiment. In the manufacturing method of the present invention, first, the tab 11 of the battery core 10 in the prior art can be cut off, leaving the top sealing edge 12 part, so that the tab 11 does not exceed the top sealing edge 12. Then, the welding member 21 on the protection plate 20 can be connected to the corresponding tab 11. After the welding member 21 on the protection plate 20 is connected to the corresponding tab 11, by bending the connected welding member 21 and tab 11, the protection plate 20 is in close contact with the top sealing edge 12. After bending, the protection plate 20 stands up and closely adheres to the top sealing edge 12 part at the top of the battery core 10, and it is preferably that the protection plate 20 does not extend beyond the top sealing edge 12 part, or the extended part is as little as possible (the thickness of the protection plate 20 is much smaller than the width of the protection plate 20).

[0064] In one embodiment of the present invention, during the process of cutting the tabs on the partial cell 10, first, the tab 11 extending beyond the top sealing edge 12 can be cut. Then, a hole is dug at the position of the top sealing edge 12 corresponding to the tab 11 to form a window 13. Finally, the welding member 21 on the protection board 20 is inserted into the corresponding window 13.

[0065] In another embodiment of the present invention, during the process of cutting the tab 11 on the partial cell 10, first, a hole can be dug at the position of the top sealing edge 12 corresponding to the tab 11 to reserve a window 13 for the tab 11 to extend out. Then, the tab 11 extending beyond the window 13 can be cut. Finally, the welding member 21 on the protection board 20 can be inserted into the corresponding window 13.

[0066] In the present invention, as Figures 1 to 6 shown, the manufacturing method of the battery according to the embodiment of the present invention is mainly used to manufacture the battery in the above embodiment. In the manufacturing method of the present invention, first, the tab 11 of the cell 10 in the prior art can be cut off, and the top sealing edge 12 part is reserved so that the tab 11 does not exceed the top sealing edge 12. Then, a hole is dug at the position of the top sealing edge 12 corresponding to the tab 11 to form a window 13. For example, a small part of the surface aluminum-plastic film at the top sealing edge 12 of the cell 10 can be removed to expose a part of the original positive tab and negative tab of the cell 10. Specifically, two small windows 13 can be opened on the top sealing edge 12 of the cell 10 by using a laser machine to remove the aluminum-plastic film on the surface of the cell 10, and the size of the window is designed according to the size of the welding member 21 of the protection board 20 to ensure that the tab 11 (at the top sealing edge 12 part) of the cell 10 is exposed, which can meet the welding requirement between the protection board 20 and the tab 11.

[0067] Next, the welding member 21 on the protection board 20 can be inserted into the corresponding window 13 to weld the positive tab, negative tab of the cell 10 and the welding member 21 (nickel sheet) on the protection board 20 together. Finally, the nickel sheet (welding member 21) of the protection board 20 is bent. After bending, the protection board 20 stands up and closely adheres to the top sealing edge 12 part at the top of the cell 10. As much as possible, the protection board 20 does not exceed the top sealing edge 12 part, or the exceeding part is as little as possible (the thickness of the protection board 20 is much smaller than the width of the protection board 20).

[0068] In summary, according to the manufacturing method of the battery of the embodiment of the present invention, by providing a window 13 on the top sealing edge 12, the tab 11 protruding from the top sealing edge 12 is cut off, and the tab 11 is located within the window 13. The welding member 21 on the protection plate 20 can extend into the window 13 to be connected with the corresponding tab 11. After the welding member 21 is connected to the tab 11, by bending, it is ensured that the protection plate 20 fits against the top sealing edge 12. By providing the window 13 on the top sealing edge 12, the present invention makes full use of the internal space of the top sealing edge 12. After the welding member 21 of the protection plate 20 is connected to the tab 11, the protection plate 20 can be brought close to the top sealing edge 12 by bending, ensuring that the protection plate 20 does not protrude beyond the top sealing edge 12 as much as possible, reducing the overall size of the battery. Under the condition of a fixed battery size, the size of the battery cell 10 can be increased, thereby increasing the capacity of the battery. At the same time, by attaching the protection plate 20 to the top sealing edge 12 of the battery cell 10, the internal winding core can be effectively prevented from moving. During the fall of the whole machine, the risk of leakage caused by the internal winding core of the battery breaking through the top sealing edge 12 can be reduced, improving the safety of the battery.

[0069] In a third aspect of the present invention, there is provided an electronic device including the battery in the above embodiment. Since the battery according to the embodiment of the present invention has the above technical effects, therefore, the box device according to the embodiment of the present invention should also have corresponding technical effects, that is, the electronic device of the present invention can improve the battery life of the electronic device by adopting this battery. During the fall of the whole machine, the risk of leakage caused by the internal winding core of the battery breaking through the top sealing edge 12 can be reduced, improving the safety of the battery.

[0070] The electronic device of the present invention can be an electronic product such as a mobile phone. Of course, for those skilled in the art, other structures and working principles of the electronic device can be understood and implemented, and will not be described in detail in the present invention.

[0071] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that, Comprising: At least one battery cell, each of the battery cells respectively having at least two tabs, each of the battery cells respectively having a top sealing edge, the top sealing edge being provided with at least two windows corresponding to the tabs, the tabs being respectively received in the corresponding windows, and the tabs not exceeding the top sealing edge; A protection board, the protection board being provided with at least two welding parts, the positions of the welding parts corresponding to the positions of the windows, the welding parts on the protection board extending into the corresponding windows, and the protection board being connected to the tabs through the welding parts, and bending the connected welding parts and tabs to make the protection board be attached to the top sealing edge.

2. The battery according to claim 1, characterized in that, The welding parts are arranged on a side of the protection board facing the top sealing edge, and the welding parts protrude from the surface of the protection board.

3. The battery according to claim 1, wherein, The orthographic projection of the protection board on the top sealing edge is located within the top sealing edge.

4. The battery according to claim 1, characterized in that, The cross-sectional shape of the window is square, triangular or circular.

5. The battery according to claim 1, wherein The welding parts are solder pads.

6. A method for manufacturing a battery, for manufacturing the battery according to any one of claims 1-5, characterized in that, The manufacturing method includes: Cutting the tabs on a part of the battery cell so that the tabs do not exceed the top sealing edge; Connecting the welding parts on the protection board to the corresponding tabs; Bending the connected welding parts and tabs to make the protection board fit with the top sealing edge.

7. The manufacturing method of the battery according to claim 6, characterized in that, The step of cutting the tabs on a part of the battery cell includes: Cutting the tabs protruding from the top sealing edge; Digging holes at positions corresponding to the tabs on the top sealing edge to form windows; Extending the welding parts on the protection board into the corresponding windows.

8. The manufacturing method of the battery according to claim 6, characterized in that, The step of cutting the tabs on a part of the battery cell includes: Digging holes at positions corresponding to the tabs on the top sealing edge to reserve windows for the tabs to extend out; Cutting the tabs protruding from the windows; Extending the welding parts on the protection board into the corresponding windows.

9. The manufacturing method of the battery according to claim 6, characterized in that, The welding parts on the protection board are respectively welded and connected to the corresponding tabs in the battery cell.

10. An electronic device, characterized in that, Including the battery according to any one of claims 1-5.

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