Battery with stop function
By incorporating stop components and vent holes in the battery, the problems of component damage and insulation wear caused by cell shaking are solved, thereby improving the stability and safety of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU PYLON BATTERY CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-14
Smart Images
Figure CN224502209U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery with a stop function. Background Technology
[0002] Currently, lightweight power batteries are quite active in the market, mainly used in electric two-wheeled or three-wheeled vehicles. Application scenarios include electric motorcycles, electric tricycles, and smart battery swapping. Current lightweight power batteries generally consist of a casing and multiple battery cells, a circuit board, and a Battery Management System (BMS) module housed within the casing. Multiple cells are stacked to form a cell assembly, with the circuit board positioned on top. The BMS module is integrated on the upper surface of the circuit board. To protect the BMS module, a gap exists between the casing's top cover and the BMS module. This gap creates a risk of movement between the battery cells and their top structure, potentially damaging the cells and other structures. Furthermore, movement can cause the insulating material protecting the tabs on the circuit board to come into contact with the top cover, leading to wear and failure, and potentially causing short circuits. Utility Model Content
[0003] The purpose of this application is to provide a battery with a stop function, which to some extent solves the technical problems existing in the prior art, such as the cell and electrical components on top of the lightweight power battery shaking, which may lead to damage to the above-mentioned components, and may also cause the insulating material attached to the circuit board to protect the tabs to come into contact with the top cover and wear out, resulting in short circuits.
[0004] This application provides a battery with a stop function, including: a casing, a cell module, and a stop member; wherein, the cell module and the stop member are both disposed inside the casing, and the stop member is disposed between the top of the cell module and the top of the casing and / or the bottom of the cell module and the bottom of the casing along the height direction of the cell module, and the stop member abuts against the cell module and the casing respectively.
[0005] In the above technical solution, further, along the height direction of the battery cell module, the stop member contacts the electrode tab of the battery cell of the battery cell module; the stop member is formed with an opening facing the heat dissipation chamber disposed away from the battery cell module, and a vent hole is formed on the side of the stop member near the battery cell module, and the vent hole is connected to the heat dissipation chamber.
[0006] In any of the above technical solutions, further, along the height direction of the battery cell module, the vent holes are provided at least in correspondence with a portion of the tabs.
[0007] In any of the above technical solutions, the stop member is further defined as a box-shaped structure with its opening facing away from the battery cell module, and the hollow interior of the box-shaped structure is a heat dissipation chamber.
[0008] In any of the above technical solutions, the number of the air vents is multiple, and they are arranged in a grid shape.
[0009] In any of the above technical solutions, the battery with the stop function further includes a heat dissipation component, which is fixed in the heat dissipation chamber and contacts the inner wall of the heat dissipation chamber and the top or bottom of the outer shell respectively; the heat dissipation component is correspondingly arranged with the vent hole.
[0010] In any of the above technical solutions, the heat dissipation component further includes a heat dissipation part and two heat-conducting parts connected to the heat dissipation part; wherein the two heat-conducting parts are respectively disposed on opposite sides of the heat dissipation part; the heat-conducting parts are connected to the inner wall of the heat dissipation chamber, and the heat dissipation part abuts against the top or bottom of the outer shell.
[0011] In any of the above technical solutions, the heat dissipation component is further made of a thermally conductive and insulating material.
[0012] In any of the above technical solutions, a main clearance groove is further formed on the side of the stop member near the cell module. The battery with the stop function also includes a battery management module. The battery management module is disposed at the top or bottom of the cell module and located in the main clearance groove. A through clearance notch is formed on the side wall of the main clearance groove.
[0013] In any of the above technical solutions, the battery with the stop function further includes a wire harness clamp, and the wire harness clamp is disposed on the inner wall of the main clearance groove for clamping the wire harness.
[0014] In any of the above technical solutions, an auxiliary avoidance groove is further formed on the side of the stop member near the battery cell module.
[0015] In any of the above technical solutions, the stop member is further connected to the top or bottom of the housing by heat fusion.
[0016] In any of the above technical solutions, the stop member is further made of a thermally conductive and insulating material.
[0017] In any of the above technical solutions, the battery cell module further includes a battery cell, a support member, a circuit board, and an insulating protective layer; wherein, there are multiple battery cells, which are stacked sequentially; along the height direction of the battery cell, the top and / or bottom of the battery cell are formed with tabs, and at least one end of the battery cell with tabs is provided with the support member and the circuit board, the support member is disposed at the top or bottom of the structure after the multiple battery cells are stacked together, and the circuit board is disposed on the side of the support member opposite to the battery cell;
[0018] The supporting member has a first clearance through hole, the circuit board has a second clearance through hole, the electrode tab passes through the first clearance through hole and the second clearance through hole in sequence and bends on the circuit board, the insulating protective layer covers the side of the electrode tab near the stop member; the circuit board is disposed on the side of the supporting member away from the battery cell; the stop member abuts against the circuit board and is pressed onto the insulating protective layer.
[0019] Compared with the prior art, the beneficial effects of this application are as follows:
[0020] This application provides a battery with a stop function. A stop member is provided between the cell module and the casing to limit the cell module, thereby effectively preventing the cell module from moving up and down during use, protecting the cell module and its electronic components from damage, and also preventing the insulating protective layer attached to the circuit board to protect the tabs from wear and failure. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or 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 application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of a battery with a stop function provided in an embodiment of this application;
[0023] Figure 2 An assembly diagram of the battery cell module and the stop component provided in an embodiment of this application;
[0024] Figure 3 A schematic diagram of the top structure of the battery cell module provided in an embodiment of this application;
[0025] Figure 4 Another structural schematic diagram of the top of the battery cell module provided in an embodiment of this application;
[0026] Figure 5 This is another assembly drawing of the battery cell module and the stop component provided in an embodiment of this application;
[0027] Figure 6 for Figure 5 A partially enlarged structural diagram;
[0028] Figure 7 Assembly drawings of the support members, circuit boards, and stop members provided in the embodiments of this application;
[0029] Figure 8 This is a schematic diagram of the structure of the stop member provided in the embodiments of this application;
[0030] Figure 9 This is another structural schematic diagram of the stop member provided in the embodiments of this application;
[0031] Figure 10 Another structural schematic diagram of the stop member provided in the embodiments of this application;
[0032] Figure 11 This is another structural schematic diagram of the stop member provided in the embodiments of this application.
[0033] Figure label:
[0034] 1-Outer shell, 11-Top cover, 12-Lower shell, 2-Cell module, 21-Cell, 211-Taper, 22-Supporting component, 23-Circuit board, 24-Insulating protective layer, 3-Stop component, 31-Bottom plate, 32-Side plate, 33-Heat dissipation chamber, 34-Ventilation hole, 35-Main clearance groove, 36-Clearing notch, 37-Auxiliary clearance groove, 4-Heat dissipation component, 41-Heat conduction part, 42-Heat dissipation part, 5-Battery management module, 6-Wire harness clamp, a-Height direction of cell module. Detailed Implementation
[0035] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0036] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0037] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0040] The following reference Figures 1 to 11 This application describes a battery with a stop function according to some embodiments.
[0041] See Figures 1 to 11 As shown, an embodiment of this application provides a battery with a stop function, including: a casing 1, a cell module 2, and a stop member 3; wherein, the cell module 2 and the stop member 3 are both disposed inside the casing 1, and along the height direction a of the cell module, the stop member 3 is disposed between the top of the cell module 2 and the top of the casing 1 and / or the bottom of the cell module 2 and the bottom of the casing 1, and the stop member 3 abuts against the cell module 2 and the casing 1 respectively.
[0042] As can be seen from the structure described above, this application provides a battery with a stop function. A stop member 3 is provided between the cell module 2 and the outer casing 1, which can limit the cell module 2 and effectively prevent the cell module 2 from moving up and down during use, protecting the cell module 2 and its electronic components from damage. At the same time, it can also prevent the insulating material on the top of the cell module 2, such as the insulating protective layer 24 attached to the circuit board 23 to protect the tab 211 as described below, from being worn and failing.
[0043] It should also be noted that the height direction 'a' of the aforementioned cell module refers to the height direction of cell 21.
[0044] In this embodiment, preferably, as follows: Figures 2 to 7As shown, along the height direction a of the battery cell module, the stop member 3 contacts the tab 211 of the battery cell 21 of the battery cell module 2; the stop member 3 has an opening facing the heat dissipation chamber 33 located away from the battery cell module 2, and a vent hole 34 is formed on the side of the stop member 3 near the battery cell module 2, and the vent hole 34 is connected to the heat dissipation chamber 33.
[0045] As can be seen from the structure described above, the hollow part inside the stop member 3 is the heat dissipation chamber 33. The heat generated at the tab 211 of the cell 21 during operation will enter the heat dissipation chamber 33 through the vent hole 34, and finally be dissipated to the outside through the outer shell 1. It can be seen that the aforementioned heat dissipation chamber 33 and vent hole 34 help to dissipate heat from the cell 21 and electronic components, ensure the performance of the battery, and help to extend the battery's lifespan. In addition, the aforementioned vent hole 34 can also reduce weight.
[0046] Furthermore, preferably, along the height direction of the cell 21, a tab 211 is formed on the top of the cell 21, and no tab 211 is provided on the bottom of the cell 21. The circuit board 23 that cooperates with the tab 211 and the battery management module 5 that cooperates with the circuit board 23 are also integrated on the top of the cell 21. Therefore, the stop member 3 is set between the top of the cell module 2 and the top of the outer shell 1, that is, the top cover 11, to limit the position of the cell 21 and the circuit board 23. This will be explained as an example later.
[0047] Furthermore, since the tab 211 generates a large amount of heat during operation, the aforementioned heat dissipation chamber 33 and ventilation hole 34 are opened on the stop member 3 to dissipate heat from the tab 211.
[0048] Of course, it is not limited to this. The tab 211 can be set only at the bottom of the cell 21. The circuit board 23 that cooperates with the tab 211 and the battery management module 5 that cooperates with the circuit board 23 are both integrated at the bottom of the cell 21. In this case, the stop member 3 is set between the bottom of the cell module 2 and the bottom of the shell 1. Alternatively, the tab 211 can be set at both the top and bottom of the cell 21. In this case, the stop member 3 can be provided at both the top and bottom of the cell module 2. In addition, it should be noted that even if the tab 211 is set only at the top or bottom of the cell 21, the stop member 3 can be provided at both the top and bottom of the cell module 2. That is to say, the setting of the stop member 3 is not limited to the tab 211 and the circuit board 23. It can be selected according to the actual needs.
[0049] In this embodiment, preferably, as follows: Figures 2 to 4As shown, there are multiple ventilation holes 34, and along the height direction a of the cell module, some ventilation holes 34 are set to correspond to some tabs 211. This helps to quickly dissipate the heat generated by the tabs 211 to the heat dissipation chamber 33 through the ventilation holes 34. Of course, due to the arrangement, other ventilation holes 34 are not set to correspond to the tabs 211.
[0050] It should be noted that: of course, it is not limited to this. All the ventilation holes 34 can also be set to correspond to the tabs 211. In addition, it should be noted that: the number of ventilation holes 34 is not limited to multiple, but can also be one. When the number of ventilation holes 34 is one, it can be set to correspond to the tabs 211 or not, depending on the actual needs.
[0051] In this embodiment, preferably, as follows: Figures 8 to 10 As shown, the stop member 3 is a box-shaped structure with its opening facing away from the battery cell module 2, and the hollow part inside the box-shaped structure is a heat dissipation chamber 33.
[0052] As can be seen from the structure described above, the stop component 3 adopts a box-shaped structure, which is lightweight, which helps with lightweight design, and can also avoid excessive compression of the battery cell 21.
[0053] Furthermore, preferably, the stop member 3 includes a bottom plate 31 connected to each other and a plurality of side plates 32. The plurality of side plates 32 are arranged sequentially along the circumference of the bottom plate 31 and connected together to form a box structure. Preferably, it is an integral structure with high overall strength. Of course, it is not limited to this.
[0054] It should be noted that the stop component 3 is not limited to a box structure, but can also be other types of structures, depending on the actual needs.
[0055] In this embodiment, preferably, as follows: Figure 9 As shown, there are multiple air vents 34, which are arranged in a grid pattern.
[0056] As described above, the structure employs multiple ventilation holes 34 arranged in a grid pattern to improve the uniformity of heat dissipation. However, this is not the only option; the multiple ventilation holes 34 can be arranged arbitrarily according to actual needs. Furthermore, it should be noted that the number of ventilation holes 34 is not limited to multiple; it can also be a single hole, depending on the specific requirements.
[0057] In this embodiment, preferably, as follows: Figures 8 to 10 As shown, the battery with the stop function also includes a heat dissipation component 4, which is fixed inside the heat dissipation chamber 33 and contacts the inner wall of the heat dissipation chamber 33 and the top of the outer casing 1 respectively.
[0058] As can be seen from the structure described above, the heat dissipation component 4 plays the role of quickly conducting heat to the outer shell 1, thereby accelerating heat dissipation.
[0059] In this embodiment, preferably, as follows: Figure 10 As shown, the heat dissipation component 4 includes a heat dissipation part 42 and two heat-conducting parts 41 connected to the heat dissipation part 42; wherein, the two heat-conducting parts 41 are respectively disposed on opposite sides of the heat dissipation part 42; the heat-conducting parts 41 are connected to the inner wall of the heat dissipation chamber 33, and the heat dissipation part 42 abuts against the top or bottom of the outer shell 1.
[0060] As can be seen from the structure described above, the heat-conducting part 41 transfers the heat generated by the battery cell 21 to the heat dissipation part 42 above, and finally conducts it to the metal top cover through the heat dissipation part 42, and conducts the heat out to the outside. Moreover, the provision of two heat dissipation parts 42 in this application not only improves the efficiency of heat conduction, but also plays a role in stabilizing and supporting the heat dissipation part 42, making the overall structure of the heat dissipation component 4 more stable.
[0061] In this embodiment, preferably, the heat dissipation component 4 is made of a thermally conductive and insulating material, which ensures both insulation and thermal conductivity.
[0062] Furthermore, preferably, the heat dissipation component 4 can be made of PBT material, but of course, it is not limited to this.
[0063] In this embodiment, preferably, as follows: Figure 3 , Figure 6 and Figure 9 As shown, a main clearance groove 35 is formed on the side of the stop member 3 near the cell module 2. The battery with the stop function also includes a battery management module 5. The battery management module 5 is disposed on the top or bottom of the cell module 2 and is located in the main clearance groove 35. A through clearance notch 36 is formed on the side wall of the main clearance groove 35.
[0064] As can be seen from the structure described above, a main clearance groove 35 is provided on the side of the stop member 3 near the cell module 2, which can then serve as a barrier for the battery management module 5. Preferably, the side wall of the main clearance groove 35 is also provided with a through clearance notch 36, which also serves to avoid the components on the battery management module 5.
[0065] In this embodiment, preferably, as follows: Figure 9 and Figure 11 As shown, the battery with a stop function also includes a wire harness clip 6, which is disposed on the inner wall of the main clearance groove 35 for holding the wire harness.
[0066] As can be seen from the structure described above, the wire harness clip 6 serves to hold the wire harness, preventing it from becoming tangled and effectively avoiding internal shaking and wear of the cable, which could lead to poor insulation.
[0067] Furthermore, preferably, the wire harness clip 6 can be a C-shaped structure with a constricted opening. Of course, it is not limited to this, and its structure can be designed according to actual needs.
[0068] In this embodiment, preferably, as follows: Figure 9 As shown, an auxiliary clearance groove 37 is also formed on the side of the stop member 3 near the cell module 2. The auxiliary clearance groove 37 is used to avoid interference with the circuit board 23 and / or other electrical components on the battery management module 5. It should be noted that the number and position of the auxiliary clearance groove 37 can be selected according to actual needs.
[0069] In this embodiment, preferably, the stop member 3 is connected to the top or bottom of the housing 1 by heat fusion.
[0070] As can be seen from the structure described above, the stop component 3 is connected to the outer shell 1 by heat fusion, resulting in a more robust and stable structure, as well as simple and convenient operation. Of course, the connection method between the stop component 3 and the outer shell 1 is not limited to the above; it can also be achieved by adhesive, screws, clips, or welding.
[0071] Furthermore, preferably, the outer edge of the stop member 3 can be used as the area for heat fusion with the top of the outer shell 1, i.e., the top cover 11, so that the connection between the two is more stable and stronger.
[0072] In this embodiment, preferably, the stop member 3 is made of a thermally conductive and insulating material, which serves to provide insulation and heat conduction, preventing short circuits and making it safer and more reliable. Of course, it is not limited to this; the stop member 3 can also be made of metal, and an insulating layer can be provided on its outer layer, depending on the actual needs.
[0073] Furthermore, preferably, the stop member 3 is made of plastic material, such as thermally conductive PBT material.
[0074] In this embodiment, preferably, as follows: Figure 6 and Figure 7 As shown, the battery cell module 2 includes a battery cell 21, a support member 22, a circuit board 23, and an insulating protective layer 24; wherein, there are multiple battery cells 21, which are stacked together in sequence; along the height direction of the battery cell 21, a tab 211 is formed on the top of the battery cell 21, and the support member 22 and the circuit board 23 are provided on the top of the battery cell 21 where the tab 211 is formed. The support member 22 is disposed on the top or bottom of the structure after multiple battery cells 21 are stacked together, and the circuit board 23 is disposed on the side of the support member 22 away from the battery cell 21;
[0075] The support member 22 has a first clearance through hole, the circuit board 23 has a second clearance through hole, the electrode tab 211 passes through the first clearance through hole and the second clearance through hole in sequence and bends on the circuit board 23, and the insulating protective layer 24 covers the side of the electrode tab 211 near the stop member 3; the circuit board 23 is disposed on the side of the support member 22 away from the battery cell 21; the stop member 3 abuts against the circuit board 23 and is pressed on the insulating protective layer 24.
[0076] As can be seen from the structure described above, both the support member 22 and the circuit board 23 serve to support the tab 211. The circuit board 23 can also collect information from the tab 211 to obtain information about the cell 21. The insulating protective layer 24 serves to protect the tab 211. Moreover, the stop member 3 presses the circuit board 23 tightly and, in turn, presses the cell 21 below through the circuit board 23 and the support member 22, thereby limiting the position of the cell 21. In addition, the stop member 3 can also prevent the insulating protective layer 24 attached to the circuit board 23 to protect the tab 211 from being worn and failing.
[0077] It should be noted that the structure of the battery cell module 2 is not limited to this and can be selected according to actual needs.
[0078] In this embodiment, preferably, as follows: Figure 1 As shown, the outer casing 1 includes a lower casing 12 and a top cover 11. The lower casing 12 and the top cover 11 are separate structures, which facilitates the installation of components such as the battery cell 21, support member 22, circuit board 23 and stop member 3 inside the lower casing 12. After installation, the top cover 11 can be installed at the top opening of the lower casing 12. The top cover 11 and the lower casing 12 can be connected by bolts, clips or welding. Of course, the structure of the outer casing 1 is not limited to this and can be designed according to actual needs.
[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application.
Claims
1. A battery with a stop function, characterized in that, include: The device comprises a housing, a battery cell module, and a stop member; wherein the battery cell module and the stop member are both disposed within the housing, and the stop member is disposed between the top of the battery cell module and the top of the housing and / or the bottom of the battery cell module and the bottom of the housing along the height direction of the battery cell module, and the stop member abuts against the battery cell module and the housing respectively.
2. The battery with a stop function according to claim 1, characterized in that, Along the height direction of the battery cell module, the stop member contacts the electrode tab of the battery cell in the battery cell module; the stop member has an opening facing a heat dissipation chamber disposed away from the battery cell module, and a vent hole is formed on the side of the stop member near the battery cell module, and the vent hole is connected to the heat dissipation chamber.
3. The battery with a stop function according to claim 2, characterized in that, Along the height direction of the battery cell module, the vent holes are provided at least in relation to a portion of the tabs.
4. The battery with a stop function according to claim 2, characterized in that, The stop member is a box-shaped structure with its opening facing away from the battery cell module, and the hollow interior of the box-shaped structure serves as a heat dissipation chamber; and / or The number of ventilation holes is multiple, and they are arranged in a grid pattern.
5. The battery with a stop function according to claim 2, characterized in that, The battery with a stop function also includes a heat dissipation component, which is fixed in the heat dissipation chamber and contacts the inner wall of the heat dissipation chamber and the top or bottom of the outer shell respectively; the heat dissipation component is correspondingly arranged with the vent hole.
6. The battery with a stop function according to claim 5, characterized in that, The heat dissipation component includes a heat dissipation section and two heat-conducting sections connected to the heat dissipation section; wherein the two heat-conducting sections are respectively disposed on opposite sides of the heat dissipation section; the heat-conducting sections are connected to the inner wall of the heat dissipation chamber, and the heat dissipation section abuts against the top or bottom of the outer shell; and / or The heat dissipation component is made of a thermally conductive and insulating material.
7. The battery with a stop function according to claim 1, characterized in that, The stop member has a main clearance groove on the side near the cell module. The battery with the stop function also includes a battery management module. The battery management module is disposed at the top or bottom of the cell module and is located in the main clearance groove. The side wall of the main clearance groove has a through clearance notch.
8. The battery with a stop function according to claim 7, characterized in that, The battery with a stop function also includes a wire harness clamp, which is disposed on the inner wall of the main clearance groove for holding the wire harness.
9. The battery with a stop function according to claim 1, characterized in that, An auxiliary clearance groove is also formed on the side of the stop member closest to the battery cell module.
10. The battery with a stop function according to any one of claims 1 to 9, characterized in that, The stop member is connected to the top or bottom of the housing by heat fusion; and / or The stop component is made of a thermally conductive and insulating material; and / or The battery cell module includes a battery cell, a support member, a circuit board, and an insulating protective layer; wherein, there are multiple battery cells, which are stacked together in sequence; along the height direction of the battery cell, the top and / or bottom of the battery cell are formed with tabs, and at least one end of the battery cell with tabs is provided with the support member and the circuit board; the support member is disposed at the top or bottom of the structure after multiple battery cells are stacked together, and the circuit board is disposed on the side of the support member opposite to the battery cell; The supporting member has a first clearance through hole, the circuit board has a second clearance through hole, the electrode tab passes through the first clearance through hole and the second clearance through hole in sequence and bends on the circuit board, the insulating protective layer covers the side of the electrode tab near the stop member; the circuit board is disposed on the side of the supporting member away from the battery cell; the stop member abuts against the circuit board and is pressed onto the insulating protective layer.