Battery protection plate, battery and electronic device
By vertically placing the main body of the protection board on the head of the cell and setting conductive parts on the assembly sidewall to connect with the tabs, and embedding electronic components inside the protection board or on the extended circuit board, the problem of large space occupation of the protection board is solved, and the battery capacity and connection strength are increased.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA ELECTRONICS CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-10
Smart Images
Figure CN224480968U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lithium-ion battery technology, and in particular to a battery protection board, a battery, and an electronic device. Background Technology
[0002] Lithium-ion batteries are widely used in various electronic devices. Currently, most electronic devices aim to maximize battery capacity to improve battery life. A lithium-ion battery typically consists of a cell and a battery protection board packaged on top of the cell. Given a fixed battery size, the smaller the size of the packaging structure housing the protection board, the more space the cell can have, thus creating conditions for increasing battery capacity.
[0003] Based on this principle, existing technologies have made many improvements, such as changing the protection board from being placed parallel to the head of the cell to being placed vertically. Here, parallel placement means that the surface of the protection board is parallel to the length direction of the cell, and vertical placement means that the surface of the protection board is perpendicular to the length direction of the cell. This reduces the space occupied by the protection board in the length direction of the battery, thereby reducing the packaging size of the protection board and increasing the battery capacity.
[0004] However, when using this setting method, such as Figure 1 As shown, it is usually necessary to set a patch device 21' on the surface of the protection board 2' away from the cell 1', and set a conductive structural component 22' on the side of the protection board 2' facing the cell 1' to weld it to the tab 11' of the cell 1' to achieve electrical connection between the cell 1' and the protection board 2'. Both the tab 11' and the structural component 22' need to be bent 180°. These structural settings occupy the dimensions of the protection board's encapsulation structure in the length direction of the battery, which affects the further improvement of battery capacity. Utility Model Content
[0005] The purpose of this invention is to provide a battery protection board, a battery, and an electronic device to improve battery capacity to a certain extent.
[0006] The first aspect of this utility model provides a battery protection board, including a protection board body and a first electronic device;
[0007] The body of the first electronic device is at least partially embedded within the main body of the protective plate;
[0008] The protection plate body is placed vertically at the head of the battery cell. The protection plate body includes an assembly sidewall extending along the length of the battery cell. The assembly sidewall is provided with a conductive part for electrical connection with the electrode tab of the battery cell.
[0009] Furthermore, the battery protection board also includes a second electronic component;
[0010] The protection board body is encapsulated in the head of the battery cell by an encapsulation structure. One end of the protection board body has an extension circuit board that extends out of the encapsulation structure, and the second electronic device is disposed on the extension circuit board.
[0011] Furthermore, the surface of the protection plate body facing the battery cell is the first surface;
[0012] The conductive portion extends toward one side of the battery cell to form a first extension portion, and the first extension portion is bent to be in contact with the first surface;
[0013] The electrode tab includes an assembly part and a first electrode tab part. The assembly part is attached to and welded to the conductive part. The first electrode tab part is connected to the assembly part in an L-shape. The first electrode tab part is attached to and welded to the first extension part.
[0014] Furthermore, a first clearance groove is formed at the position opposite to the first extension on the first surface to accommodate the first extension.
[0015] Furthermore, the surface of the protection board body facing away from the battery cell is the second surface;
[0016] The conductive portion extends to the side away from the battery cell to form a second extension, which is bent to be in contact with the second surface.
[0017] The electrode includes an assembly part and a second electrode part. The assembly part is attached to and welded to the conductive part. The second electrode part is connected to the assembly part in an L-shape. The second electrode part is attached to and welded to the second extension part.
[0018] Furthermore, a second clearance groove is formed at the position opposite to the second extension on the second surface to accommodate the second extension.
[0019] Furthermore, there are multiple second electronic devices, each of which is mounted on the extended circuit board and encapsulated on the extended circuit board by an adhesive layer or a plastic encapsulation layer.
[0020] Furthermore, there are multiple second electronic devices, which are mounted and encapsulated on a carrier board to form a module, which is mounted on the extended circuit board.
[0021] The second aspect of this utility model provides a battery, including the battery protection board described in any of the above claims.
[0022] The third aspect of this utility model provides an electronic device, including the aforementioned battery.
[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0024] The battery protection board provided by this utility model includes a protection board body, which is vertically placed at the head of the battery cell. The circumferential sidewall of the protection board body includes an assembly sidewall extending along the length direction of the battery cell. The assembly sidewall is provided with a conductive part for electrical connection with the tabs of the battery cell. Therefore, by setting the conductive part on the assembly sidewall on one side of the width direction of the protection board body, when the tabs of the battery cell are assembled with the protection board body, neither the tabs nor the conductive part need to be bent 180° between the protection board body and the battery cell. This effectively reduces the space occupied by the connection between the tabs and the protection board body in the length direction of the battery cell, thereby reducing the size of the packaging structure of the protection board body in the length direction of the battery cell. Consequently, within the constraints of a given battery size, the length of the battery cell can be extended to a certain extent to increase the battery capacity.
[0025] Meanwhile, the battery protection board also includes a first electronic component, the body of which is at least partially embedded inside the main body of the protection board. This avoids the first electronic component occupying additional space along the length of the battery, thereby further reducing the size of the protection board's encapsulation structure along the length of the cell and increasing battery capacity.
[0026] This utility model also provides a battery and an electronic device including the battery. The battery includes a battery protection board, so the battery and the electronic device also have the beneficial effects of a battery protection board. Attached Figure Description
[0027] 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.
[0028] Figure 1 This is a schematic diagram of the assembly structure of a battery protection board and a battery cell in the prior art.
[0029] Figure 2 A schematic diagram of an assembly structure of a battery protection board and a battery cell provided for an embodiment of this utility model (the tabs do not include the second tab portion).
[0030] Figure 3 A schematic diagram of another assembly structure of the battery protection board and the battery cell provided for an embodiment of this utility model (the tab includes a second tab portion).
[0031] Figure 4A schematic diagram of the battery protection board provided in an embodiment of this utility model from a first-view perspective;
[0032] Figure 5 This is a schematic diagram of the battery protection board provided in an embodiment of the present invention from a second perspective.
[0033] Figure label:
[0034] exist Figure 1 In the diagram, 1'-cell, 11'-tab, 2'-protection board, 21'-surface mount device, 22'-structural component;
[0035] exist Figures 2 to 5 In the middle, 1-battery cell, 11-tab, 12-assembly part, 13-first tab part, 14-second tab part, 2-protection board body, 21-assembly side wall, 22-conductive part, 3-extension circuit board, 4-first electronic device, 5-second electronic device. Detailed Implementation
[0036] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0037] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
[0038] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0041] The following reference Figures 2 to 5 This application describes a battery protection board, battery, and electronic device according to some embodiments.
[0042] The first aspect of this application provides a battery protection board, such as Figure 2 As shown, the battery protection board includes a protection board body 2. The end of the battery cell 1 with the tab 11 in the length direction is the head of the battery cell 1. The protection board body 2 is placed vertically on the head of the battery cell 1 and is encapsulated in the head of the battery cell 1 through an encapsulation structure. The vertical placement of the protection board body 2 means that the plate surface of the protection board body 2 is perpendicular to the length direction of the battery cell 1, that is, the thickness direction of the protection board body 2 extends along the length direction of the battery cell 1.
[0043] like Figure 4 As shown, the protective plate body 2 includes two surfaces (i.e., the first surface and the second surface hereinafter referred to as the first surface and the second surface) that are opposite each other along its own thickness direction, and a circumferential sidewall connecting the two surfaces. The circumferential sidewall of the protective plate body 2 includes a mounting sidewall 21. It can be understood that the mounting sidewall 21 extends along the thickness direction of the protective plate body 2, i.e., the length direction of the battery cell 1. Specifically, the protective plate body 2 has a predetermined width along the thickness direction of the battery cell 1, and the mounting sidewall 21 is located on one side of the width direction of the protective plate body 2.
[0044] In this embodiment, the mounting sidewall 21 is provided with a conductive portion 22 for electrical connection with the tab 11 of the battery cell 1. Therefore, by providing the conductive portion 22 on the mounting sidewall 21 on one side of the width direction of the protection board body 2, when the tab 11 of the battery cell 1 is assembled with the protection board body 2, neither the tab 11 nor the conductive portion 22 needs to be bent 180° between the protection board body 2 and the battery cell 1. This effectively reduces the space occupied by the connection between the tab 11 and the protection board body 2 in the length direction of the battery cell 1, thereby reducing the size of the encapsulation structure of the protection board body 2 in the length direction of the battery cell 1. Consequently, under the constraint of a given battery size, the length of the battery cell 1 can be extended to a certain extent to increase the battery capacity.
[0045] At the same time, such as Figure 5As shown, the battery protection board also includes a variety of electronic components. Some of these electronic components are located on the main body 2 of the protection board and are defined as the first electronic component 4. The other electronic components are located on the extension circuit board 3 described below and are defined as the second electronic component 5.
[0046] Regarding the arrangement of the first electronic device 4, in this embodiment, preferably, the body of the first electronic device 4 is partially or entirely embedded inside the protective plate body 2. Therefore, compared to the prior art where the first electronic device 4 is arranged on one side of the protective plate body 2 in the thickness direction, the arrangement of the first electronic device 4 in this application avoids the first electronic device 4 occupying additional space in the length direction of the battery, thereby further reducing the size of the packaging structure of the protective plate body 2 in the length direction of the cell 1, and thus further increasing the battery capacity.
[0047] In this embodiment, preferably, there are multiple first electronic devices 4, which are spaced apart and embedded inside the protective plate body 2.
[0048] Regarding the arrangement of the second electronic device 5, in this embodiment, preferably, the protection board body 2 is encapsulated in the head of the battery cell 1 by a packaging structure, and an extension circuit board 3 extending out of the packaging structure is formed at one end of the protection board body 2. The second electronic device 5 is arranged on the extension circuit board 3. Therefore, by moving a portion of all the electronic devices of the battery protection board out of the packaging structure and placing them on the extension circuit board 3 outside the packaging structure, the space occupied by the electronic device arrangement in the packaging structure can be effectively reduced, allowing the packaging structure to have a smaller size, thus creating conditions for increasing battery capacity.
[0049] Regarding the arrangement of the second electronic device 5 on the extension circuit board 3, in this embodiment, preferably, there are multiple second electronic devices 5. Multiple second electronic devices 5 can be mounted on the extension circuit board 3 using surface mount technology, and the second electronic devices 5 can be encapsulated on the extension circuit board 3 by an adhesive layer or a plastic encapsulation layer to reinforce the assembly strength.
[0050] Alternatively, multiple second electronic devices 5 can be first mounted on a carrier board using surface mount technology to integrate them into a module, and then the entire module can be mounted onto the extension circuit board 3 using surface mount technology. All second electronic devices 5 can be integrated into one module, or they can be divided into multiple modules according to their functions.
[0051] In one embodiment of this application, preferably, one side surface of the protective plate body 2 in the thickness direction is the first surface, and the first surface of the protective plate body 2 faces the battery cell 1.
[0052] like Figure 2As shown, the tab 11 of the battery cell 1 includes an assembly portion 12 and a first tab portion 13. Specifically, after the tab 11 of the battery cell 1 extends from the top sealing edge of the battery cell 1, it first forms the first tab portion 13. The first tab portion 13 continues to extend outward to form the assembly portion 12. The assembly portion 12 is bent away from the battery cell 1 relative to the first tab portion 13, so that the first tab portion 13 and the assembly portion 12 are connected in an L-shape. The protective plate body 2 is located in the L-shaped space formed by the first tab portion 13 and the assembly portion 12, and the conductive portion 22 on the assembly sidewall 21 of the protective plate body 2 is attached to and welded to the assembly portion 12 to form an electrical connection. The first surface of the protective plate body 2 is opposite to the first tab portion 13.
[0053] In this embodiment, the conductive part 22 extends toward one side of the battery cell 1 to form a first extension. The first extension is bent toward the first surface to be in contact with the first surface, so that the first extension is in contact with the second tab and welded together, thereby increasing the connection area between the tab 11 of the battery cell 1 and the protective plate body 2 to a certain extent and increasing the connection strength.
[0054] In this embodiment, preferably, a first clearance groove is formed on the first surface of the protective plate body 2, and the first clearance groove is opposite to the first extension to accommodate the first extension; preferably, the first extension does not protrude from the first surface of the protective plate body 2. This avoids the first extension occupying the space of the packaging structure of the protective plate body 2 in the length direction of the cell 1.
[0055] In this embodiment, preferably, as follows: Figure 3 As shown, the side surface of the protective plate body 2 that is away from the battery cell 1 along its own thickness direction is the second surface; the conductive part 22 extends to the side away from the battery cell 1 and forms a second extension, which is bent toward the second surface until it is in contact with the second surface.
[0056] The tab 11 includes an assembly portion 12 and a second tab portion 14. The assembly portion 12 is attached to and welded to the conductive portion 22 to form an electrical connection. The second tab portion 14 extends from the side of the assembly portion 12 away from the battery cell 1, and the second tab portion 14 is bent relative to the assembly portion 12, so that the second tab portion 14 and the assembly portion 12 are connected in an L-shape. The second tab portion 14 is also attached to and welded to the second extension portion. This increases the connection area between the tab 11 of the battery cell 1 and the protection plate body 2, thereby increasing the connection strength.
[0057] In this embodiment, preferably, a second clearance groove is formed on the second surface of the protective plate body 2, and the second clearance groove is opposite to the second extension to accommodate the second extension; preferably, the second extension does not protrude from the second surface of the protective plate body 2. This avoids the second extension occupying the space of the encapsulation structure of the protective plate body 2 in the length direction of the cell 1.
[0058] It should be noted that in this application, the conductive portion 22 may only have a first extension portion or a second extension portion, or it may have both a first extension portion and a second extension portion.
[0059] When the conductive portion 22 extends only to form the first extension portion, the electrode tab 11 includes the first electrode tab portion 13 and the assembly portion 12.
[0060] When the conductive portion 22 extends only to form the second extension portion, or when the conductive portion 22 extends to form both the first extension portion and the second extension portion, the electrode tab 11 includes the first electrode tab portion 13, the assembly portion 12, and the second electrode tab portion.
[0061] The second aspect of this application provides a battery including the battery protection board of any of the above embodiments. Therefore, the battery also has all the beneficial effects of the battery protection board, which will not be described in detail here.
[0062] The third aspect of this application provides an electronic device that includes the aforementioned battery. Therefore, the electronic device also has all the beneficial effects of a battery protection board, which will not be described in detail here.
[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A battery protection board, characterized in that, Includes the main body of the protection board and the first electronic component; The body of the first electronic device is at least partially embedded within the main body of the protective plate; The protection plate body is placed vertically at the head of the battery cell. The protection plate body includes an assembly sidewall extending along the length of the battery cell. The assembly sidewall is provided with a conductive part for electrical connection with the electrode tab of the battery cell.
2. The battery protection board according to claim 1, characterized in that, The battery protection board also includes a second electronic component; The protection board body is encapsulated in the head of the battery cell by an encapsulation structure. One end of the protection board body has an extension circuit board that extends out of the encapsulation structure, and the second electronic device is disposed on the extension circuit board.
3. The battery protection board according to claim 1, characterized in that, The surface of the protection board body facing the battery cell is the first surface; The conductive portion extends toward one side of the battery cell to form a first extension portion, and the first extension portion is bent to be in contact with the first surface; The electrode tab includes an assembly part and a first electrode tab part. The assembly part is attached to and welded to the conductive part. The first electrode tab part is connected to the assembly part in an L-shape. The first electrode tab part is attached to and welded to the first extension part.
4. The battery protection board according to claim 3, characterized in that, A first clearance groove is formed at the position of the first surface opposite to the first extension to accommodate the first extension.
5. The battery protection board according to claim 1, characterized in that, The surface of the protection board body facing away from the battery cell is the second surface; The conductive portion extends to the side away from the battery cell to form a second extension, which is bent to be in contact with the second surface. The electrode includes an assembly part and a second electrode part. The assembly part is attached to and welded to the conductive part. The second electrode part is connected to the assembly part in an L-shape. The second electrode part is attached to and welded to the second extension part.
6. The battery protection board according to claim 5, characterized in that, A second clearance groove is formed at the position of the second surface opposite to the second extension to accommodate the second extension.
7. The battery protection board according to claim 2, characterized in that, The number of the second electronic devices is multiple, and the multiple second electronic devices are respectively mounted on the extension circuit board and encapsulated on the extension circuit board by an adhesive layer or a plastic encapsulation layer.
8. The battery protection board according to claim 2, characterized in that, The number of the second electronic devices is multiple, and the multiple second electronic devices are mounted and encapsulated on a carrier board to form a module, which is mounted on the extension circuit board.
9. A battery, characterized in that, Includes the battery protection board according to any one of claims 1 to 8.
10. An electronic device, characterized in that, Includes the battery as described in claim 9.