Battery protection plate and battery assembly
Patent Information
- Application Number
- CN202522314261.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]通常电芯和电池保护板的连接器均设置于电池保护板的保护板主体的同一面，且位于同一高度，这导致连接器与外部设备的电连接受保护板主体的限制，无法根据实际连接需求进行位置调整，从而造成电池组件的适用范围较小
[0011]相对于现有技术中的电池保护板采用一个一体的保护板主体，本申请将电池保护板的保护板主体设置为包括第一硬性线路板、第二硬性线路板和柔性线路板的组合结构，柔性线路板的第一端与第一硬性线路板的第一端电连接，柔性线路板的第二端与第二硬性线路板的第一端电连接，即将保护板主体设置为间隔的两部分硬性线路板，并在第一硬性线路板和第二硬性线路板之间设置柔性线路板，然后将连接器设置于第二硬性线路板。当电池组件安装至电子设备时，连接器通过柔性线路板可相对于第一硬性线路板进行灵活运动，以调节连接器的位置，避免受第一硬性线路板的限制，从而方便连接器与外部设备电连接，进而扩大电池组件的适用范围。
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Figure CN224842218U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of battery design technology, specifically relating to a battery protection board and a battery assembly. Background Technology
[0002] Battery modules, as power supply devices for electronic devices, provide electrical energy for the normal operation of these devices. A battery module mainly consists of battery cells and a battery protection board. The battery cells store and release electrical energy, while the battery protection board provides overcharge, over-discharge, and short-circuit protection for the battery module.
[0003] Typically, the connectors for the battery cell and the battery protection board are located on the same side of the protection board body and at the same height. This restricts the electrical connection between the connector and external devices, making it impossible to adjust the position according to actual connection requirements, thus limiting the applicability of the battery assembly. Utility Model Content
[0004] The purpose of this application is to provide a battery protection board and battery assembly that can solve the problem of the limited applicability of current battery assemblies.
[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 protection board, including a protection board body and a connector. The protection board body includes a first rigid circuit board, a second rigid circuit board, and a flexible circuit board. A first end of the flexible circuit board is electrically connected to a first end of the first rigid circuit board, and a second end of the flexible circuit board is electrically connected to a first end of the second rigid circuit board. The connector is disposed on the second rigid circuit board and is electrically connected to the second rigid circuit board.
[0006] Optionally, the flexible circuit board has a first connecting segment and a second connecting segment facing away from each other, the first rigid circuit board has a third connecting segment, the first connecting segment and the third connecting segment are stacked and electrically connected, and the second rigid circuit board has a fourth connecting segment, the second connecting segment and the fourth connecting segment are stacked and electrically connected.
[0007] Optionally, the first rigid circuit board includes a first circuit board body and the third connecting segment connected together. The battery protection board also includes a functional device, which is disposed on the first circuit board body and electrically connected to the first circuit board body. The functional device and the first connecting segment are located on the same side of the first rigid circuit board. Optionally, the second rigid circuit board includes a second circuit board body and the fourth connecting segment connected together, the connector being disposed on the second circuit board body, and the width of the second circuit board body being greater than the width of the fourth connecting segment. Optionally, the flexible circuit board has a first connecting segment and a second connecting segment facing away from each other, the first rigid circuit board has a third connecting segment, the first connecting segment is sandwiched inside the third connecting segment and the two are electrically connected, and the second rigid circuit board has a fourth connecting segment, the second connecting segment is sandwiched inside the fourth connecting segment and the two are electrically connected. Optionally, the battery protection board further includes functional devices, wherein the first rigid circuit board is provided with the functional devices on a first side and a second side opposite to each other in the thickness direction, and the functional devices are electrically connected to the first rigid circuit board.
[0008] Optionally, the first end of the flexible circuit board is welded to the first end of the first rigid circuit board; and / or, the second end of the flexible circuit board is welded to the first end of the second rigid circuit board. Optionally, the length of the second rigid circuit board is less than the length of the first rigid circuit board, and in a direction perpendicular to the second rigid circuit board, the orthographic projection of the connector is located within the orthographic projection of the second rigid circuit board.
[0009] Secondly, embodiments of this application also provide a battery assembly, including a battery cell and the aforementioned battery protection board, wherein the tabs of the battery cell are electrically connected to the first rigid circuit board of the battery protection board.
[0010] Optionally, the first rigid circuit board has a first tab connection area and a second tab connection area respectively on its first edge and second edge opposite to each other in the width direction. The number of battery cells is at least two, including a first battery cell and a second battery cell arranged at intervals. The first battery cell and the second battery cell are respectively located on two opposite sides of the first rigid circuit board in the width direction. The tab of the first battery cell is electrically connected to the first tab connection area, and the tab of the second battery cell is electrically connected to the second tab connection area. The battery assembly also includes a battery bracket with a receiving space. The first battery cell, the second battery cell, and the battery protection board are all disposed in the receiving space.
[0011] Compared to existing battery protection boards that use a single, integrated protection board body, this application presents a combined structure comprising a first rigid circuit board, a second rigid circuit board, and a flexible circuit board. The first end of the flexible circuit board is electrically connected to the first end of the first rigid circuit board, and the second end of the flexible circuit board is electrically connected to the first end of the second rigid circuit board. In other words, the protection board body is composed of two spaced-apart rigid circuit boards, with the flexible circuit board positioned between the first and second rigid circuit boards. The connector is then positioned on the second rigid circuit board. When the battery assembly is installed in an electronic device, the connector can move flexibly relative to the first rigid circuit board via the flexible circuit board to adjust its position, avoiding restriction by the first rigid circuit board. This facilitates electrical connection between the connector and external devices, thereby expanding the applicability of the battery assembly. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the battery protection board disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the protective plate body disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the battery assembly disclosed in the embodiments of this application; Figure 4 for Figure 3 A magnified view of a portion of the structure shown.
[0013] Explanation of reference numerals in the attached figures: 100-Battery protection board, 110-Protection board body, 111-First rigid circuit board, 111a-Third connecting segment, 111b-First circuit board body, 111c-First tab connection area, 111d-Second tab connection area, 112-Second rigid circuit board, 112a-Fourth connecting segment, 112b-Second circuit board body, 113-Flexible circuit board, 113a-First connecting segment, 113b-Second connecting segment, 120-Connector, 130-Functional device; 200 - Cell, 200' - First cell, 200” - Second cell, 210 - Tab; 300-Battery bracket. Detailed Implementation
[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0015] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0016] The battery protection board and battery assembly provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0017] like Figures 1 to 4 As shown in the figure, this application embodiment provides a battery protection board, which includes a protection board body 110 and a connector 120. The protection board body 110 is used for electrical connection with the tabs 210 of the battery cell 200, and the connector 120 is used for electrical connection with the contact terminals of external devices to realize functions such as current transmission and signal transmission. The protection board body 110 includes a first rigid circuit board 111, a second rigid circuit board 112, and a flexible circuit board 113. The first rigid circuit board 111 and the second rigid circuit board 112 can both be PCB boards, which have the characteristics of high rigidity, good bending resistance, high reliability, and long service life. The flexible circuit board 113 can be an FPC board, which has the characteristics of high integration, thinness, and flexibility. The first end of the flexible circuit board 113 is electrically connected to the first end of the first rigid circuit board 111, and the second end of the flexible circuit board 113 is electrically connected to the first end of the second rigid circuit board 112. A connector 120 is disposed on the second rigid circuit board 112 and electrically connected to it. That is, the current in the battery cell 200 flows sequentially through the first rigid circuit board 111, the flexible circuit board 113, and the second rigid circuit board 112 to the connector 120. Optionally, the connector 120 can be connected to the second rigid circuit board 112 by soldering, or it can be plugged into the second rigid circuit board 112 via contact terminals. This embodiment does not impose specific limitations on this.
[0018] Compared to existing battery protection boards that use a single integrated protection board body, this application sets the protection board body 110 of the battery protection board as a combination structure including a first rigid circuit board 111, a second rigid circuit board 112, and a flexible circuit board 113. The first end of the flexible circuit board 113 is electrically connected to the first end of the first rigid circuit board 111, and the second end of the flexible circuit board 113 is electrically connected to the first end of the second rigid circuit board 112. In other words, the protection board body 110 is configured as two spaced-apart rigid circuit boards, with the flexible circuit board 113 positioned between the first and second rigid circuit boards 111 and 112. Then, the connector 120 is positioned on the second rigid circuit board 112. When the battery assembly is installed in an electronic device, the connector 120 can move flexibly relative to the first rigid circuit board 111 via the flexible circuit board 113 to adjust the position of the connector 120, avoiding restriction by the first rigid circuit board 111. This facilitates electrical connection between the connector 120 and external devices, thereby expanding the applicability of the battery assembly. Therefore, the embodiments of this application can solve the problem of the limited applicability of current battery modules.
[0019] Optionally, the two opposite ends of the flexible circuit board 113 can be electrically connected to the end faces of the first rigid circuit board 111 and the second rigid circuit board 112, respectively; or, in other optional embodiments, the flexible circuit board 113 is provided with a first connecting segment 113a and a second connecting segment 113b opposite to each other, the first rigid circuit board 111 is provided with a third connecting segment 111a, the first connecting segment 113a and the third connecting segment 111a are stacked and electrically connected, the second rigid circuit board 112 is provided with a fourth connecting segment 112a, and the second connecting segment 113b and the fourth connecting segment 112a are connected to each other. The connecting segments 112a are stacked and electrically connected, that is, the two opposite ends of the flexible circuit board 113 are partially stacked with the first rigid circuit board 111 and the second rigid circuit board 112, respectively, to increase the connection area between the flexible circuit board 113 and the first rigid circuit board 111 and between the flexible circuit board 113 and the second rigid circuit board 112, thereby improving the connection stability and firmness between the flexible circuit board 113 and the first rigid circuit board 111 and the second rigid circuit board 112, and thus improving the stability of the current and signal transmission of the battery protection board.
[0020] In a further optional embodiment, the first rigid circuit board 111 includes a first circuit board body 111b connected to the aforementioned third connecting segment 111a. The battery protection board also includes a functional device 130. Optionally, the functional device 130 can be a control IC, a MOS switch, a resistor, a capacitor, and auxiliary devices (NTC temperature sensor, ID memory, etc.). This application embodiment does not impose specific limitations on this. The functional device 130 is disposed on the first circuit board body 111b and is electrically connected to the first circuit board body 111b. Optionally, the functional device 130 and the first connecting segment 113a can be located on different sides of the first rigid circuit board 111, or the functional device 130 and the first connecting segment 113a can be located on the same side of the first rigid circuit board 111. In this case, the functional device 130 and the first connecting segment 113a are arranged in the same plane in the thickness direction of the first rigid circuit board 111, occupying the same space. The functional device 130 does not need to occupy additional space, which can reduce the thickness of the battery protection board. In another optional embodiment, the second rigid circuit board 112 includes a connected second circuit board body 112b and the aforementioned fourth connecting segment 112a. A connector 120 is disposed on the second circuit board body 112b, and the width of the second circuit board body 112b is greater than the width of the fourth connecting segment 112a. In this application, the connector 120 is disposed on the second circuit board body 112b, and the width of the second circuit board body 112b is greater than the width of the fourth connecting segment 112a. In this case, the area of the second circuit board body 112b is larger, which facilitates the placement of the connector 120.
[0021] Optionally, the width of the fourth connecting segment 112a can be equal to the width of the flexible circuit board 113 to ensure a stable connection between the second rigid circuit board 112 and the flexible circuit board 113.
[0022] Optionally, the width of the first rigid circuit board 111 can be equal to or slightly larger than the width of the flexible circuit board 113. On the basis of ensuring a stable connection between the first rigid circuit board 111 and the flexible circuit board 113, the size of the part of the protection board body 110 other than the first circuit board body 111b can be set to be smaller, thereby reducing its space occupation and thus reducing the size of the battery assembly.
[0023] In another optional embodiment, the flexible circuit board 113 is provided with a first connecting segment 113a and a second connecting segment 113b facing away from each other, the first rigid circuit board 111 is provided with a third connecting segment 111a, the first connecting segment 113a is sandwiched inside the third connecting segment 111a and the two are electrically connected, the second rigid circuit board 112 is provided with a fourth connecting segment 112a, the second connecting segment 113b is sandwiched inside the fourth connecting segment 112a and the two are electrically connected, that is, the two opposite ends of the flexible circuit board 113 are respectively sandwiched inside the first rigid circuit board 111 and the second rigid circuit board 112, so as to further increase the connection area between the flexible circuit board 113 and the first rigid circuit board 111 and between the flexible circuit board 113 and the second rigid circuit board 112, thereby improving the connection stability and firmness between the flexible circuit board 113 and the first rigid circuit board 111 and the second rigid circuit board 112, and thus improving the stability of the current and signal transmission of the battery protection board.
[0024] In another optional embodiment, the battery protection board further includes functional devices 130. The first rigid circuit board 111 has functional devices 130 on both its first and second opposing sides in the thickness direction, and the functional devices 130 are electrically connected to the first rigid circuit board 111. In this solution, the first rigid circuit board 111 adopts a double-sided layout, which allows for the arrangement of a larger number of functional devices 130, thereby enhancing the multifunctionality of the battery protection board. Of course, functional devices 130 can also be provided only on the first or second side of the first rigid circuit board 111.
[0025] Optionally, the first and second ends of the flexible circuit board 113 opposite to each other can be electrically connected to the first end of the first rigid circuit board 111 and the first end of the second rigid circuit board 112 respectively using contact terminals; or, in other optional embodiments, the first end of the flexible circuit board 113 is welded to the first end of the first rigid circuit board 111. Since welding has the characteristics of high connection strength and low cost, it is beneficial to improve the connection firmness between the flexible circuit board 113 and the first rigid circuit board 111.
[0026] And / or, in another optional embodiment, the second end of the flexible circuit board 113 is welded to the first end of the second rigid circuit board 112. Since welding has the characteristics of high connection strength and low cost, it is beneficial to improve the connection between the flexible circuit board 113 and the second rigid circuit board 112. Optionally, the first end of the flexible circuit board 113 and the first end of the first rigid circuit board 111, as well as the second end of the flexible circuit board 113 and the first end of the second rigid circuit board 112, can be welded by spot welding. This ensures a strong connection between the two and also has the advantages of high welding efficiency and low cost.
[0027] In another optional embodiment, the length of the second rigid circuit board 112 is less than the length of the first rigid circuit board 111. In the direction perpendicular to the second rigid circuit board 112, the orthographic projection of the connector 120 lies within the orthographic projection of the second rigid circuit board 112. Since the second rigid circuit board 112 serves as the basis for the connector 120, its length can be set to be smaller, thereby reducing the space occupied by the second rigid circuit board 112. Furthermore, in the direction perpendicular to the second rigid circuit board 112 (i.e., in the thickness direction of the second rigid circuit board 112), the orthographic projection of the connector 120 lies within the orthographic projection of the second rigid circuit board 112. This ensures a larger connection area between the connector 120 and the second rigid circuit board 112, thereby improving the stability and robustness of the connection between them.
[0028] Based on the battery protection board provided in the embodiments of this application, the embodiments of this application also provide a battery assembly, which includes a battery cell 200 and a battery protection board 100 as described in any of the above embodiments, wherein the tab 210 of the battery cell 200 is electrically connected to the first rigid circuit board 111 of the battery protection board 100. In one optional embodiment, the first rigid circuit board 111 has a first tab connection area 111c and a second tab connection area 111d respectively on its first and second opposite edges in the width direction. The number of battery cells 200 is at least two, including a first battery cell 200' and a second battery cell 200" spaced apart. The first and second battery cells 200' are located on opposite sides of the first rigid circuit board 111 in the width direction. The tab 210 of the first battery cell 200' is electrically connected to the first tab connection area 111c, and the tab 210 of the second battery cell 200" is electrically connected to the second tab connection area 111d. That is, multiple battery cells 200 share the same battery protection board 100, which not only improves the utilization rate of the battery protection board 100 but also reduces the space occupied by the battery protection board 100. Of course, the battery protection board 100 can also be configured in a one-to-one correspondence with the battery cells 200.
[0029] Optionally, the battery assembly also includes a battery bracket 300, which has a receiving space. Optionally, the battery bracket 300 can be a ring structure, and the first battery cell 200', the second battery cell 200" and the battery protection board 100 are all disposed within the receiving space. As a fixing structure for fixing the battery assembly to the main body of the electronic device, the battery bracket 300 can not only prevent the battery assembly from loosening or falling off during use, but also ensure the safety of the battery cell 200 and the battery protection board 100, preventing them from being damaged by external forces.
[0030] Optionally, both the first tab connection area 111c and the second tab connection area 111d can be provided with a transition nickel sheet. Since the tab 210 is usually made of aluminum and the rigid circuit board is usually made of copper, it is not easy to apply solder when copper and aluminum are directly soldered. Therefore, by setting the first tab connection area 111c and the second tab connection area 111d, direct contact between copper and aluminum is avoided, thereby facilitating a stable connection between the tab 210 and the first rigid circuit board 111.
[0031] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A battery protection board, characterized in that, The system includes a protection board body (110) and a connector (120). The protection board body (110) includes a first rigid circuit board (111), a second rigid circuit board (112), and a flexible circuit board (113). The first end of the flexible circuit board (113) is electrically connected to the first end of the first rigid circuit board (111), and the second end of the flexible circuit board (113) is electrically connected to the first end of the second rigid circuit board (112). The connector (120) is disposed on the second rigid circuit board (112) and is electrically connected to the second rigid circuit board (112).
2. The battery protection board according to claim 1, characterized in that, The flexible circuit board (113) has a first connecting segment (113a) and a second connecting segment (113b) facing away from each other. The first rigid circuit board (111) has a third connecting segment (111a). The first connecting segment (113a) and the third connecting segment (111a) are stacked and electrically connected. The second rigid circuit board (112) has a fourth connecting segment (112a). The second connecting segment (113b) and the fourth connecting segment (112a) are stacked and electrically connected.
3. The battery protection board according to claim 2, characterized in that, The first rigid circuit board (111) includes a first circuit board body (111b) and the third connecting segment (111a) connected together. The battery protection board also includes a functional device (130). The functional device (130) is disposed on the first circuit board body (111b) and electrically connected to the first circuit board body (111b). The functional device (130) and the first connecting segment (113a) are located on the same side of the first rigid circuit board (111).
4. The battery protection board according to claim 2, characterized in that, The second rigid circuit board (112) includes a second circuit board body (112b) and the fourth connecting segment (112a) connected together. The connector (120) is disposed on the second circuit board body (112b). The width of the second circuit board body (112b) is greater than the width of the fourth connecting segment (112a).
5. The battery protection board according to claim 1, characterized in that, The flexible circuit board (113) has a first connecting segment (113a) and a second connecting segment (113b) facing away from each other. The first rigid circuit board (111) has a third connecting segment (111a). The first connecting segment (113a) is sandwiched inside the third connecting segment (111a) and the two are electrically connected. The second rigid circuit board (112) has a fourth connecting segment (112a). The second connecting segment (113b) is sandwiched inside the fourth connecting segment (112a) and the two are electrically connected.
6. The battery protection board according to claim 1, characterized in that, The battery protection board also includes a functional device (130). The first rigid circuit board (111) has the functional device (130) on its first and second sides opposite to each other in the thickness direction. The functional device (130) is electrically connected to the first rigid circuit board (111).
7. The battery protection board according to claim 1, characterized in that, The first end of the flexible circuit board (113) is welded to the first end of the first rigid circuit board (111); and / or, the second end of the flexible circuit board (113) is welded to the first end of the second rigid circuit board (112).
8. The battery protection board according to claim 1, characterized in that, The length of the second rigid circuit board (112) is less than the length of the first rigid circuit board (111), and the orthographic projection of the connector (120) is located within the orthographic projection of the second rigid circuit board (112) in a direction perpendicular to the second rigid circuit board (112).
9. A battery assembly, characterized in that, The battery includes a battery cell (200) and a battery protection board (100) according to any one of claims 1 to 8, wherein the tabs (210) of the battery cell (200) are electrically connected to the first rigid circuit board (111) of the battery protection board (100).
10. The battery assembly according to claim 9, characterized in that, The first rigid circuit board (111) has a first tab connection area (111c) and a second tab connection area (111d) respectively on its first and second opposite edges in the width direction. The number of the battery cells (200) is at least two, including a first battery cell (200') and a second battery cell (200") arranged at intervals. The first battery cell (200') and the second battery cell (200") are respectively located on opposite sides of the first rigid circuit board (111) in the width direction. The tab (210) of the first battery cell (200') is electrically connected to the first tab connection area (111c), and the tab (210) of the second battery cell (200") is electrically connected to the second tab connection area (111d). The battery assembly also includes a battery bracket (300). The battery bracket (300) has a receiving space. The first battery cell (200'), the second battery cell (200") and the battery protection board (100) are all disposed in the receiving space.