Battery sampling assembly and battery pack

Abstract

The utility model provides a kind of battery sampling assembly and battery pack, wherein battery sampling assembly includes FPC body and battery sampling cantilever, FPC body is electrically connected with battery sampling cantilever;Battery sampling cantilever includes connecting portion, stretch part and sampling part, at least partial area of connecting portion is connected with FPC body, connecting portion and sampling part are connected by stretch part, stretch part and sampling part are all stretched out FPC body, and fuse zone is provided on stretch part.The battery sampling assembly can realize the independent fusing of each battery sampling cantilever, and the sampling current of the battery sampling cantilever of the single road can be disconnected in the case of overcurrent, so as to protect the FPC body and other BMS components from being damaged, and further protect the smooth operation of the whole battery management system.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery sampling component and battery pack. Background Technology

[0002] In a Battery Management System (BMS), the Flexible Printed Circuit Board (FPC) plays a crucial role. It uses a sampling cantilever to accurately sample the voltage and temperature of the battery pack, providing key data for the BMS to effectively monitor and manage the battery status. However, in actual battery pack operation, overcurrent situations frequently occur. Overcurrent can be caused by various factors, such as internal short circuits or sudden changes in external load. Once an overcurrent occurs, the instantaneous large current can cause serious damage to the FPC and other BMS components.

[0003] Meanwhile, other BMS components, such as control chips, sampling resistors, and capacitors, may also experience excessively high voltage and current due to overcurrent, leading to component performance degradation and burnout. This can cause the BMS to malfunction, fail to provide timely and effective protection and management of the battery pack, and ultimately result in serious safety accidents such as battery overheating and fire. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a battery sampling component that can effectively protect the FPC and other BMS components from damage when the sampled battery experiences overcurrent.

[0005] Another objective of this invention is to provide a battery pack.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery sampling assembly includes an FPC body and a battery sampling cantilever, wherein the FPC body is electrically connected to the battery sampling cantilever.

[0008] The battery sampling cantilever includes a connecting part, a tensioning part, and a sampling part. At least a portion of the connecting part is connected to the FPC body. The connecting part and the sampling part are connected through the tensioning part. Both the tensioning part and the sampling part extend out of the FPC body. A fusible area is provided on the tensioning part.

[0009] As can be seen from the above technical solution, when the sampling section of the battery sampling assembly samples the voltage and temperature of the battery pack, the current is transmitted sequentially through the sampling section, tension section, and connection section of the battery sampling cantilever connected to the corresponding battery cell to the FPC body. When one or more battery cells experience overcurrent, the current will be interrupted in the fuse zone, thus preventing the current from flowing through the FPC body and burning out the sampling circuit at the back end. Therefore, this battery sampling assembly can achieve independent fuse breaking for each battery sampling cantilever, and can disconnect the sampling current of the battery sampling cantilever in a single circuit in the event of overcurrent, thereby protecting the FPC body and other BMS components from damage, and thus ensuring the smooth operation of the entire battery management system. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the connection between the battery sampling device and the FPC body disclosed in the embodiment of this utility model.

[0012] Figure 2 This is a schematic diagram of the battery sampling assembly disclosed in the embodiments of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the tensioning part disclosed in the embodiment of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 100. FPC body;

[0016] 200. Battery sampling cantilever; 201. Connecting part; 202. Tensioning part; 2021. Insulating film; 2022. Fuse; 2022a. First section; 2022b. Second section; 2022c. Third section; 203. Sampling part; 204. Fuse zone; 205. First weak zone; 206. Second weak zone. Detailed Implementation

[0017] In view of this, the core of this utility model is to provide a battery sampling component that can effectively protect the FPC and other BMS components from damage when the sampled battery experiences overcurrent.

[0018] Another objective of this invention is to provide a battery pack.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Please refer to... Figures 1-3 .

[0020] Please refer to Figures 1 to 2 The battery sampling assembly disclosed in this embodiment of the present invention includes an FPC body 100 and a battery sampling cantilever 200, wherein the FPC body 100 and the battery sampling cantilever 200 are electrically connected.

[0021] The battery sampling cantilever 200 includes a connecting part 201, a tensioning part 202, and a sampling part 203. At least a portion of the connecting part 201 is connected to the FPC body 100. The connecting part 201 and the sampling part 203 are connected through the tensioning part 202. Both the tensioning part 202 and the sampling part 203 extend out of the FPC body 100. A fusible area 204 is provided on the tensioning part 202.

[0022] When the sampling section 203 of the battery sampling assembly samples the voltage and temperature of the battery pack, the current is transmitted sequentially through the sampling section 203, tension section 202, and connection section 201 of the battery sampling cantilever 200 connected to the corresponding battery cell to the FPC body 100. When one or more battery cells experience overcurrent, the current will be interrupted in the fuse zone 204, thereby preventing the current from flowing through the FPC body 100 and burning out the sampling circuit at the back end. Therefore, this battery sampling assembly can achieve independent fuse breaking of each battery sampling cantilever 200, and can disconnect the sampling current of the battery sampling cantilever 200 in the event of overcurrent in a single circuit, thereby protecting the FPC body 100 and other BMS components from damage, and thus ensuring the smooth operation of the entire battery management system.

[0023] It should be noted that the stretching portion 202 disclosed in this embodiment of the present invention includes two insulating films 2021 and a fuse 2022 disposed between the two insulating films 2021, with a fusing area 204 disposed on the fuse 2022. The insulating films 2021 provide insulation to the fuse 2022. When the sampling portion 203 of the battery sampling assembly samples a battery cell, the current of the battery cell can be transmitted to the FPC body 100 through the fuse 2022.

[0024] As a further embodiment, the tensioning portion 202 disclosed in this utility model embodiment includes at least a first tensioning segment and a second tensioning segment, wherein the first tensioning segment and the second tensioning segment are connected in a curved structure. With this configuration, when the battery pack encounters bumps and vibrations, the battery sampling cantilever 200 undergoes greater deformation under the same external force, thereby reducing energy dissipation caused by structural stress concentration.

[0025] In order to achieve insulation protection for the fuse 2022, the fuse 2022 and the insulating film 2021 disposed in the tension zone in the present utility model embodiment are basically configured in a contour-following manner.

[0026] As a further embodiment, please refer to Figure 3 The battery sampling cantilever 200 disclosed in this embodiment of the utility model has a fuse 2022 disposed in the tension part 202, which includes a first segment 2022a, a second segment 2022b, and a third segment 2022c. The first segment 2022a, the second segment 2022b, and the third segment 2022c are connected in an S-shaped structure. The fusing area 204 is disposed on at least one of the first segment 2022a, the second segment 2022b, and the third segment 2022c.

[0027] In other words, the circuit breaker zone 204 can be set only on the first segment 2022a, or the second segment 2022b, or the third segment 2022c, or it can be set on the first segment 2022a and the second segment 2022b, the second segment 2022b and the third segment 2022c, or the first segment 2022a and the third segment 2022c. Of course, it can also be set on the first segment 2022a, the second segment 2022b and the third segment 2022c at the same time.

[0028] As a further embodiment, the total length of the fusion zone 204 of the battery sampling cantilever 200 disclosed in this embodiment of the present invention is at least 5mm-20mm.

[0029] As a specific embodiment, the total length of the fusible region 204 of the battery sampling cantilever 200 disclosed in this utility model embodiment can be 5mm, 10mm, 15mm, 17mm or 20mm.

[0030] Because the fuse zone 204 is long enough, the arc can be extinguished by heat dissipation during the elongation process, reducing the risk of arc reignition. If the length of the fuse zone 204 is too short, the arc may continue to conduct, causing the fuse 2022 to fail or the circuit to be damaged. Therefore, the setting of the length of the fuse zone 204 disclosed in this utility model embodiment can achieve precise overload failure control.

[0031] As a further embodiment, the fusing current of the fusing zone 204 disclosed in this utility model embodiment is 5A-10A. This allows for precise threshold control between "normal circuit operation" and "abnormal overcurrent protection".

[0032] As a specific embodiment, the fusing current of the fusing area 204 disclosed in this utility model embodiment can be 5A, 7A, 8A or 10A.

[0033] As a further embodiment, a first weak region 205 is provided between the stretching part 202 and the insulating film 2021 of the sampling part 203, and a second weak region 206 is provided between the stretching part 202 and the insulating film 2021 of the connecting part 201.

[0034] When the tension section 202 is subjected to load, the stress in the first weak zone 205 and the second weak zone 206 is significantly higher than that in other areas due to the abrupt change in cross-section. They reach the material yield strength or fracture strength first, thus absorbing vibration energy and reducing the fatigue stress amplitude between the tension section 202 and the sampling section 203 and between the tension section 202 and the connecting section 201, thereby achieving stress release, overload protection and fracture control.

[0035] It should be noted that the battery sampling cantilever 200 disclosed in this embodiment of the present invention is multiple and is distributed sequentially on both sides of the FPC body 100.

[0036] This utility model embodiment does not limit the specific material of the battery sampling cantilever 200. The battery sampling cantilever 200 can be made of copper or aluminum. Any material that meets the requirements of this utility model is within the protection scope of this utility model.

[0037] This utility model embodiment also discloses a battery pack, including a battery sampling component as disclosed in any of the above embodiments.

[0038] Since the battery pack uses the battery sampling component disclosed in the present invention, the battery pack also has the technical advantages of the battery sampling component disclosed in the present invention, and the present invention will not elaborate on these advantages further.

[0039] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0040] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery sampling component, characterized in that, It includes an FPC body and a battery sampling cantilever, wherein the FPC body is electrically connected to the battery sampling cantilever; The battery sampling cantilever includes a connecting part, a tensioning part, and a sampling part. At least a portion of the connecting part is connected to the FPC body. The connecting part and the sampling part are connected through the tensioning part. Both the tensioning part and the sampling part extend out of the FPC body. A fusible area is provided on the tensioning part.

2. The battery sampling assembly according to claim 1, characterized in that, The stretching portion includes two insulating films and a fuse disposed between the two insulating films, and the fusing zone is disposed on the fuse.

3. The battery sampling assembly according to claim 2, characterized in that, The stretching section includes at least a first stretching segment and a second stretching segment, which are connected to form a curved structure.

4. The battery sampling assembly according to claim 3, characterized in that, The fuse disposed in the tension section includes a first section, a second section, and a third section, which are connected in an S-shaped structure, and the fusing zone is disposed on at least one of the first section, the second section, and the third section.

5. The battery sampling assembly according to claim 1 or 4, characterized in that, The total length of the fusion zone is at least 5mm-20mm.

6. The battery sampling assembly according to claim 1 or 4, characterized in that, The fusing current of the fusing zone is 5A-10A.

7. The battery sampling assembly according to claim 2, characterized in that, A first weak zone is provided between the insulating film of the stretching part and the sampling part, and a second weak zone is provided between the insulating film of the stretching part and the connecting part.

8. The battery sampling assembly according to claim 1, characterized in that, The battery sampling cantilever consists of multiple arms, which are distributed sequentially on both sides of the FPC body.

9. The battery sampling assembly according to claim 1, characterized in that, The battery sampling cantilever is made of copper or aluminum.

10. A battery pack, characterized in that, Includes the battery sampling component as described in any one of claims 1-9.

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