Battery module protection plate and battery
By setting a special extension section for electrode lines and signal lines on the substrate of the battery protection plate, the problem of insufficient flow capacity of the battery protection plate is solved, and the reliability and safety of the battery module are improved.
Patent Information
- Application Number
- CN202421855198.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The current battery protection plate has poor flow capacity, resulting in poor reliability and safety of the battery module.
By providing the first and second extension sections on the substrate of the battery protection plate, the electrode lines and the signal lines are respectively used to set the electrode lines and the signal lines, and output through the corresponding electrical connectors, it is ensured that the signal lines do not occupy the set area of the electrode lines.
The flow capacity of the battery protection plate is improved, and the reliability and safety of the battery module are improved.
Smart Images
Figure CN222981756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery protection board and a battery module. Background Art
[0002] As Figure 1 shown, the battery module includes battery cells and a battery protection board, and the battery protection board is electrically connected to the tabs of the battery cells. Protection devices are arranged on the battery protection board to form a battery management unit, so as to protect the charging and discharging of the battery module.
[0003] In the related art, the battery protection board includes a substrate and electronic components. The electronic components are arranged on the substrate. Positive wires, negative wires and signal wires are arranged on the substrate. The positive wire and the negative wire are used for charging and discharging the battery module, and the signal wire is used for specific auxiliary functions of the battery module, such as clock signal wires, bidirectional data wires, ground detection wires, thermistors and other signal wires.
[0004] However, in the related art, each additional signal wire consumes 0.3 mm of width on the substrate, so it will occupy the setting area of the positive wire and the negative wire, and further cause the setting width of the positive wire and the negative wire to be small, thus resulting in a reduction in the current-carrying capacity of the battery protection board, and therefore the reliability and safety of the battery module are poor. Summary of the Utility Model
[0005] The utility model discloses a battery protection board and a battery module to solve the problem of poor current-carrying capacity of the battery protection board.
[0006] To solve the above problems, the utility model adopts the following technical solutions:
[0007] A battery protection board includes a substrate, a first electrical connector and a second electrical connector;
[0008] The substrate includes a main body section, a first extension section and a second extension section. The first extension section and the second extension section both extend from the edge of the main body section, and the first extension section and the second extension section are arranged at intervals; the main body section is used for arranging electronic components, the first extension section is used for arranging electrode wires, and the second extension section is used for arranging signal wires;
[0009] The first electrical connector is arranged at one end of the first extension section departing from the main body section, and the first electrical connector is electrically connected to the electrode wire; the second electrical connector is arranged at one end of the second extension section departing from the main body section, and the signal wire is electrically connected to the second electrical connector.
[0010] A battery module includes battery cells and the above-mentioned battery protection board, and the battery cells are connected to the battery protection board.
[0011] The technical solution adopted by the present utility model can achieve the following beneficial effects:
[0012] In the battery protection board disclosed by the present utility model, the electrode wire is arranged on the first extension section and is electrically connected to the electrode wire through the first electrical connector; the signal wire is arranged on the second extension section and is electrically connected to the signal wire through the second electrical connector. At this time, the electrode wire and the signal wire are arranged on two spaced extension sections and are output through the corresponding electrical connectors. Therefore, the electrode wire and the signal wire are output separately, and the signal wire does not occupy the setting area of the electrode wire, so that the electrode wire has a sufficiently large setting area, thereby improving the current-carrying capacity of the battery protection board, and further improving the reliability and safety of the battery module. Description of the Drawings
[0013] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:
[0014] Figure 1 is a schematic structural diagram of a battery module;
[0015] Figure 2 is a schematic structural diagram of a battery protection board in the related art;
[0016] Figure 3 is a schematic structural diagram of the first battery protection board disclosed in the embodiment of the present utility model;
[0017] Figure 4 is a schematic structural diagram of the second battery protection board disclosed in the embodiment of the present utility model;
[0018] Figure 5 is a schematic structural diagram of the third battery protection board disclosed in the embodiment of the present utility model.
[0019] Description of the reference numerals:
[0020] 10 - Substrate, 11 - Electrical connector, 12 - Output terminal;
[0021] 100 - Battery protection board, 101 - Positive output terminal, 102 - Negative output terminal, 103 - Signal output terminal, 110 - Substrate, 111 - Main body section, 111a - Device pad, 112 - First extension section, 112a - First sub-extension section, 112b - Second sub-extension section, 1121 - First strip section, 1122 - Second strip section, 113 - Second extension section, 1131 - Third strip section, 1132 - Fourth strip section, 120 - First electrical connector, 130 - Second electrical connector, 200 - Battery cell. Detailed Embodiments
[0022] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.
[0023] As Figure 1 shown, the battery module includes battery cells 200 and a battery protection board 100, and the battery protection board 100 is electrically connected to the tabs of the battery cells 200. Protection devices are arranged on the battery protection board 100 to form a battery management unit, thereby protecting the charging and discharging of the battery module. Figure 1 The battery protection board 100 in
[0024] As Figure 2 shown, the battery protection board 100 includes a substrate 10, electronic components, and an electrical connector 11. Here, the substrate 10, electronic components, and electrical connector 11 are all arranged on the substrate 10. Electrode lines and signal lines are formed on the substrate 10, and the electrode lines and signal lines are output from the same side of the substrate 10 and electrically connected to the same electrical connector 11. As Figure 2 shown, the right side of the substrate 10 has an output terminal 12, and electrode lines and signal lines can be formed on the output terminal 12. Here, the electrode lines include a positive electrode line and a negative electrode line. The positive electrode line can be denoted as p+, and the negative electrode line can be denoted as p-. Figure 2 The electrical connector 11 in Figure 1 forms the positive output terminal 101, negative output terminal 102, and signal output terminal 103 in
[0025] However, Figure 2The electrode line and the signal line in it are output from the same position of the substrate 10. At this time, for each additional signal line, 0.3 mm of the width on the substrate 10 is consumed. The current-carrying capacity of the battery protection board 100 is positively correlated with the width D, the thickness L, and the allowable temperature rise T of the substrate 10. Assuming that the current-carrying capacity of the electrode line of the substrate 10 is 1 A, when the thickness of the substrate 10 is 1L, the allowable temperature rise is 1T, and the width is 1 mm, the equivalent formula is: 1A = kLT, where K is a constant; assuming that one signal line is added under the width of 1D (consuming 0.3 mm of width), the current-carrying capacity at this time is: k(TD)×(1 - 0.3) = 0.7kLT. That is: adding one signal line will cause the current-carrying capacity to decrease: 1 - (0.7kLT÷kLT) = 30%. Therefore, the signal line will occupy the setting area of the electrode line, which will further result in a smaller setting width of the positive electrode line and the negative electrode line, thus causing the current-carrying capacity of the battery protection board 100 to decrease, and therefore causing the reliability and safety of the battery module to be poor.
[0026] The following will combine with the attached drawings to detail the technical solutions disclosed in each embodiment of the present invention.
[0027] As Figures 3 to 5 shown, an embodiment of the present invention discloses a battery protection board 100, and the disclosed battery protection board 100 includes a substrate 110, a first electrical connector 120, and a second electrical connector 130.
[0028] The substrate 110 includes a main body section 111, a first extension section 112, and a second extension section 113. Both the first extension section 112 and the second extension section 113 extend from the edge of the main body section 111, and the first extension section 112 and the second extension section 113 are spaced apart. At this time, the first extension section 112 and the second extension section 113 are two extension sections extending from different positions of the main body section 111. The main body section 111 is used to set electronic components. Specifically, device pads 111a are provided on the main body section 111, and electronic components can be soldered to the main body section 111 through the device pads 111a. The electronic components here include but are not limited to devices such as capacitors, resistors, and inductors. The first extension section 112 is used to set the electrode line, that is, the electrode line is output from the first extension section 112. The second extension section 113 is used to set the signal line, that is, the signal line is output from the second extension section 113. At this time, due to the different positions of the first extension section 112 and the second extension section 113, the setting positions of the signal line and the electrode line are different.
[0029] A first electrical connector 120 is provided at one end of the first extension section 112 facing away from the main body section 111, and the first electrical connector 120 is electrically connected to the electrode line. At this time, part of the circuit structure on the main body section 111 is electrically conducted to the first electrical connector 120 through the electrode line. The first electrical connector 120 here forms Figure 1The positive output terminal 101 and the negative output terminal 102 in it. One end of the second extension segment 113 departing from the main body segment 111 is provided with a second electrical connector 130, and the signal line is electrically connected to the second electrical connector 130. At this time, part of the circuit structure on the main body segment 111 is electrically conducted to the second electrical connector 130 through the signal line. The second electrical connector 130 here forms Figure 1 the signal output terminal 103 in it. Optionally, the first electrical connector 120 and the second electrical connector 130 can be gold fingers, electrical connection elastic sheets, board-to-board connectors, etc. Of course, the first electrical connector 120 and the second electrical connector 130 can also be other electrical connection structures, which are not limited in this article.
[0030] In the embodiments disclosed in the present application, the electrode line is arranged on the first extension segment 112 and is electrically connected to the electrode line through the first electrical connector 120. The signal line is arranged on the second extension segment 113 and is electrically connected to the signal line by arranging the second electrical connector 130. At this time, the electrode line and the signal line are arranged on two spaced extension segments and are output through the corresponding electrical connectors. Therefore, the electrode line and the signal line are output separately, and the signal line does not occupy the setting area of the electrode line, so that the electrode line has a sufficiently large setting area, thereby improving the current-carrying capacity of the battery protection board 100, and further improving the reliability and safety of the battery module.
[0031] The battery protection board 100 in the present application compared to Figure 2 the solution in it, the electrode line and the signal line are arranged on two spaced extension segments. At this time, when the width of the substrate 110 is the same, the battery protection board 100 in the present application has better current-carrying capacity.
[0032] In addition, the battery protection board 100 in the present application and Figure 2 the solution in it, in the case of the same current-carrying capacity, since the electrode line and the signal line are arranged on two spaced extension segments and the width of each extension segment is smaller, it is possible to reduce the overall width of the battery protection board 100.
[0033] In addition, the electrode line and the signal line are output separately, which can also further reduce the impedance of the battery protection board 100, thereby further improving the performance of the battery protection board 100.
[0034] In the embodiments of the present application, since the signal line does not need to conduct large current, the thickness of the second extension segment 113 can be reduced, and the overall weight of the battery protection board 100 can be reduced.
[0035] In another alternative embodiment, the first extension segment 112 may include a first strip segment 1121 and a second strip segment 1122. One end of the first strip segment 1121 may be connected to the main body segment 111, and the other end of the first strip segment 1121 may be connected to the second strip segment 1122. The extending direction of the first strip segment 1121 intersects with the extending direction of the second strip segment 1122, and the first electrical connector 120 is disposed on the second strip segment 1122. Here, the extending directions of the first strip segment 1121 and the second strip segment 1122 are their length directions, that is to say, the extending direction of the first strip segment 1121 is the length direction of the first strip segment 1121, and the extending direction of the second strip segment 1122 is the length direction of the second strip segment 1122.
[0036] In this solution, the first extension segment 112 is composed of two connected strip segments. The strip segment has the characteristics of a large dimension in the length direction and a small dimension in the width direction. Therefore, while ensuring that the first extension segment 112 is relatively long, the width of the first extension segment 112 is made smaller. In addition, since the extending direction of the first strip segment 1121 intersects with the extending direction of the second strip segment 1122, the extending direction of the electrode wire can be changed, so that the output orientation of the electrode wire is more flexible.
[0037] In another solution, the extending direction of the first strip segment 1121 is perpendicular to the extending direction of the second strip segment 1122, that is to say, the length direction of the first strip segment 1121 is perpendicular to the length direction of the second strip end.
[0038] Similarly, the second extension segment 113 includes a third strip segment 1131 and a fourth strip segment 1132. One end of the third strip segment 1131 is connected to the main body segment 111, and the other end of the third strip segment 1131 is connected to the fourth strip segment 1132. The extending direction of the third strip segment 1131 intersects with the extending direction of the fourth strip segment 1132, and the second electrical connector 130 is disposed on the fourth strip segment 1132.
[0039] In this solution, the second extension segment 113 is composed of two connected strip segments. The strip segment has the characteristics of a large dimension in the length direction and a small dimension in the width direction. Therefore, while ensuring that the second extension segment 113 is relatively long, the width of the second extension segment 113 is made smaller. In addition, since the extending direction of the third strip segment 1131 intersects with the extending direction of the fourth strip segment 1132, the extending direction of the signal wire can be changed, so that the output orientation of the signal wire is more flexible.
[0040] In another solution, the extending direction of the third strip segment 1131 is perpendicular to the extending direction of the fourth strip segment 1132, that is to say, the length direction of the third strip segment 1131 is perpendicular to the length direction of the fourth strip end.
[0041] In another alternative embodiment, as Figure 3 and Figure 4 shown, the first extension segment 112 and the second extension segment 113 may be distributed along the length direction of the main body segment 111, and are respectively located at two opposite ends of the main body segment 111. Specifically, the main body segment 111 may have a first end and a second end arranged opposite to each other along its length direction. The first extension segment 112 may extend from the first end of the main body segment 111, and the second extension segment 113 may extend from the second end of the main body segment 111.
[0042] In this solution, the signal line and the electrode line are output from two opposite ends of the main body segment 111, thus avoiding the risk of mutual influence and interference between the signal line and the electrode line, and further improving the safety and reliability of the battery protection board 100.
[0043] Furthermore, as Figure 3 shown, the extending direction of the first strip segment 1121 may be parallel to the extending direction of the third strip segment 1131. The extending direction of the second strip segment 1122 may be parallel to the extending direction of the third strip segment 1131. This solution can make the outer shape structure of the substrate 110 more regular, thereby more contributing to reducing the overall outer dimension of the substrate 110, and thus being beneficial to reducing the width of the battery protection board 100.
[0044] In the above embodiment, as Figure 3 shown, the second strip segment 1122 and the fourth strip segment 1132 may extend in the same direction. At this time, the second strip segment 1122 and the fourth strip segment 1132 are parallel and have the same extending direction. In another alternative solution, the second strip segment 1122 and the fourth strip segment 1132 may extend in opposite directions. At this time, the second strip segment 1122 and the fourth strip segment 1132 are parallel and have opposite extending directions.
[0045] In another alternative embodiment, the first extension segment 112 and the second extension segment 113 may be located on two adjacent sides of the main body segment 111. Specifically, the main body segment 111 includes a first side, a second side, a third side, and a fourth side connected end to end. The first side and the third side are the sides in the width direction of the main body segment 111, and the second side and the fourth side are the sides in the length direction of the main body segment 111. One of the first extension segment 112 and the second extension segment 113 may be disposed on the side in the width direction of the main body segment 111, and the other may be disposed on the side in the length direction of the main body segment 111. For example, the first extension portion may extend from the first side, and the second extension segment 113 may extend from the second place for filing.
[0046] This solution can reduce the dimension of the substrate 110 in the length direction, thus being more beneficial to reducing the length of the protection board.
[0047] In another alternative embodiment, as Figure 4 shown, the second extension segment 113 may be located at one end of the main body segment 111 facing away from the first extension segment 112, and the extending direction of the first strip segment 1121 is perpendicular to the extending direction of the second strip segment 1122, and the fourth strip end extends in a direction away from the first extension segment 112.
[0048] In this solution, while reducing the size in the length direction of the substrate 110, the signal line and the electrode line are output from opposite ends of the main body segment 111, thus avoiding the risk of mutual influence and interference between the signal line and the electrode line, and further improving the safety and reliability of the battery protection board 100.
[0049] Figure 3 and Figure 4 The solution shown in Figure 5 is different from the solution shown in Figure 3 and Figure 4 in that the number of the first extension segments 112 in Figure 5 is one, while the solution shown in
[0050] In another alternative embodiment, the number of the first electrical connectors 120 may be multiple, the first extension segment 112 may include multiple sub-extension segments, and the multiple sub-extension segments and the second extension segment 113 may be distributed at intervals along the edge of the main body segment 111. Each sub-extension segment may be correspondingly arranged with one first electrical connector 120. Each sub-extension segment is provided with an electrode line. At this time, the electrode lines corresponding to each sub-extension segment are independently output.
[0051] In this solution, the battery protection board 100 is formed with multiple electrode output ends, so that the charging and discharging efficiency of the battery module can be improved, and further the performance of the battery module can be improved.
[0052] Further, the number of the sub-extension segments may be two, namely a first sub-extension segment 112a and a second sub-extension segment 112b. The first sub-extension segment 112a and the second sub-extension segment 112b may be distributed along the length direction of the main body segment 111 and are respectively located at opposite ends of the main body segment 111, and the second extension segment 113 is located between the first sub-extension segment 112a and the second sub-extension segment 112b.
[0053] This solution can not only improve the performance of the battery module, but also avoid the risk of interference caused by too many sub-extension segments.
[0054] Specifically, the first sub-extension segment 112a may be arranged on the first side, the second sub-extension segment 112b may be arranged on the third side, and the second extension segment 113 may be arranged on the second side or the fourth side.
[0055] In another alternative embodiment, as Figure 5 shown, both the first sub-extension segment 112a and the second sub-extension segment 112b may include a first strip segment 1121 and a second strip segment 1122. One end of the first strip segment 1121 is connected to the main body segment 111, the other end of the first strip segment 1121 is connected to the second strip segment 1122, the extending direction of the first strip segment 1121 intersects with the extending direction of the second strip segment 1122, and the first electrical connector 120 is disposed on the second strip segment 1122.
[0056] The extending direction of the first strip segment 1121 of the first sub-extension segment 112a is parallel to the extending direction of the first strip segment 1121 of the second sub-extension segment 112b. The extending direction of the second strip segment 1122 of the first sub-extension segment 112a is parallel to the extending direction of the second strip segment 1122 of the second sub-extension segment 112b, and both the second strip segment 1122 of the first sub-extension segment 112a and the second strip segment 1122 of the second sub-extension segment 112b may extend in a direction away from the second extension segment 113.
[0057] In this solution, both the first sub-extension segment 112a and the second sub-extension segment 112b are composed of two connected strip segments. The strip segment has the characteristics of a large dimension in the length direction and a small dimension in the width direction. Therefore, while ensuring that the first sub-extension segment 112a and the second sub-extension segment 112b are relatively long, the widths of the first sub-extension segment 112a and the second sub-extension segment 112b are relatively small. In addition, the extending direction of the first strip segment 1121 intersects with the extending direction of the second strip segment 1122, so that the extending direction of the electrode wire can be changed, thereby making the output orientation of the electrode wire more flexible.
[0058] Figure 5 The first sub-extension segment 112a and the second sub-extension segment 112b in Figure 3 and Figure 4 have the same structure as the first extension segment 112 in Figure 5 The solution in Figure 3 and Figure 4 differs only in the quantity and the setting position from the solution in
[0059] Only several specific setting manners of the substrate 110 are disclosed herein. Of course, the structures in which the signal lines and the electrode lines on the substrate 110 are independently output all fall within the scope protected by this article.
[0060] Based on the battery protection board 100 of any one of the above embodiments of the present application, an embodiment of the present application further discloses a battery module. The disclosed battery module device includes the battery protection board 100 of any one of the above embodiments.
[0061] The battery module disclosed in the present application may further include a battery cell 200, and the battery protection board 100 may be electrically connected to the battery cell 200. The specific connection structure between the battery cell 200 and the battery protection board 100 is a well-known technology and will not be limited herein.
[0062] In the above embodiments of the present utility model, the differences between the various embodiments are mainly described. As long as the different optimized features between the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. For the sake of brevity of the description, they will not be elaborated herein.
[0063] The above are only the embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.
Claims
1. A battery protection board, characterized in that: It comprises a substrate (110), a first electrical connector (120) and a second electrical connector (130); The substrate (110) comprises a main section (111), a first extension section (112) and a second extension section (113); the first extension section (112) and the second extension section (113) both extend from the edge of the main section (111), and the first extension section (112) and the second extension section (113) are arranged at intervals; the main section (111) is used to arrange electronic components, the first extension section (112) is used to arrange electrode lines, and the second extension section (113) is used to arrange signal lines; The first electrical connector (120) is provided at one end of the first extension section (112) facing away from the main section (111), and the first electrical connector (120) is electrically connected to the electrode line; the second electrical connector (130) is provided at one end of the second extension section (113) facing away from the main section (111), and the signal line is electrically connected to the second electrical connector (130).
2. The battery protection board according to claim 1, characterized in that: The first extension section (112) comprises a first strip section (1121) and a second strip section (1122); one end of the first strip section (1121) is connected to the main section (111), and the other end of the first strip section (1121) is connected to the second strip section (1122); an extension direction of the first strip section (1121) intersects with an extension direction of the second strip section (1122); and the first electrical connector (120) is arranged on the second strip section (1122); and / or, The second extension section (113) comprises a third strip section (1131) and a fourth strip section (1132); one end of the third strip section (1131) is connected to the main section (111), and the other end of the third strip section (1131) is connected to the fourth strip section (1132); an extension direction of the third strip section (1131) intersects with an extension direction of the fourth strip section (1132); and the second electrical connector (130) is arranged on the fourth strip section (1132).
3. The battery protection board according to claim 2, characterized in that: The first extension section (112) and the second extension section (113) are distributed along the length direction of the main section (111), and are respectively located at two opposite ends of the main section (111).
4. The battery protection board according to claim 3, characterized in that: The extension direction of the first strip segment (1121) is parallel to the extension direction of the third strip segment (1131), and the extension direction of the second strip segment (1122) is parallel to the extension direction of the third strip segment (1131).
5. The battery protection board according to claim 2, characterized in that: The first extension section (112) and the second extension section (113) are located on two adjacent sides of the main body section (111).
6. The battery protection board according to claim 5, characterized in that: The second extension section (113) is located at one end of the main section (111) away from the first extension section (112), and the extension direction of the first strip section (1121) is perpendicular to the extension direction of the second strip section (1122), and the fourth strip section (1132) extends in a direction away from the first extension section (112).
7. The battery protection board according to claim 1, characterized in that: There are multiple first electrical connectors (120), the first extension segment (112) includes multiple sub-extension segments, and the multiple sub-extension segments and the second extension segment (113) are distributed along the edge of the main segment (111); each sub-extension segment is arranged in a one-to-one correspondence with a first electrical connector (120), and each sub-extension segment is provided with the electrode line.
8. The battery protection board according to claim 7, characterized in that: The number of the sub-extension sections is two, namely a first sub-extension section (112a) and a second sub-extension section (112b); the first sub-extension section (112a) and the second sub-extension section (112b) are distributed along the length direction of the main section (111), and are respectively located at two opposite ends of the main section (111); the second extension section (113) is located between the first sub-extension section (112a) and the second sub-extension section (112b).
9. The battery protection board according to claim 8, characterized in that: The first sub-extension section (112a) and the second sub-extension section (112b) both comprise a first strip section (1121) and a second strip section (1122); one end of the first strip section (1121) is connected to the main section (111); the other end of the first strip section (1121) is connected to the second strip section (1122); an extension direction of the first strip section (1121) intersects with an extension direction of the second strip section (1122); and the first electrical connector (120) is arranged on the second strip section (1122); The extension directions of the first strip segment (1121) of the first sub-extension segment (112a) and the first strip segment (1121) of the second sub-extension segment (112b) are parallel; the extension directions of the second strip segment (1122) of the first sub-extension segment (112a) and the second strip segment (1122) of the second sub-extension segment (112b) are parallel, and the second strip segment (1122) of the first sub-extension segment (112a) and the second strip segment (1122) of the second sub-extension segment (112b) both extend in a direction away from the second extension segment (113).
10. A battery module, characterized in that: It comprises a battery cell (200) and a battery protection board (100) according to any one of claims 1 to 9, wherein the battery cell (200) is connected to the battery protection board (100).