CN217881815U - Sampling assembly and battery module - Google Patents
Sampling assembly and battery module Download PDFInfo
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- CN217881815U CN217881815U CN202221696683.5U CN202221696683U CN217881815U CN 217881815 U CN217881815 U CN 217881815U CN 202221696683 U CN202221696683 U CN 202221696683U CN 217881815 U CN217881815 U CN 217881815U
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- circuit board
- busbar
- sampling assembly
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a sampling subassembly and battery module, the sampling subassembly includes: the bus bar is used for being connected with the positive electrode or the negative electrode of the battery cell; the circuit board is arranged on one side of the battery cell and positioned between the positive electrode and the negative electrode of the battery cell, and comprises a circuit board main body and a bus bar connecting part arranged on the circuit board main body and used for being connected with a bus bar to transmit voltage information; wherein, the preparation material of circuit board is copper, the one end and the circuit board main part integrated into one piece of busbar connecting portion, and the other end and the busbar welded connection of busbar connecting portion to solve among the battery module among the prior art because of the many and higher problem of the risk that leads to taking place to lose efficacy of switching point on the FPC sampling assembly.
Description
Technical Field
The utility model relates to a battery sampling technical field particularly, relates to a sampling subassembly and battery module.
Background
The whole vehicle power battery pack is used for providing a power source for the electric vehicle, and voltage information and temperature information of a battery cell in the battery pack need to be collected for monitoring the electric quantity and the temperature state of the battery pack.
A Flexible Printed Circuit (FPC) in a Printed Circuit Board (PCB) is a common acquisition device, and has the characteristics of high wiring density, light weight, thin lamination, good bending property and the like.
An FPC sampling assembly in the prior art generally consists of a nickel plate, an FPC body, a Negative Temperature Coefficient thermistor (NTC for short) and a connector; wherein, the nickel sheet used for heat transfer has the function of voltage acquisition.
In the sampling process, the transmission path of the voltage information is as follows: cell → module bus → nickel plate → FPC body → connector → wire harness relay → Battery Management System (BMS for short); the transmission path of the temperature information is as follows: bus bar → nickel plate → NTC → FPC body → connector → wire harness relay → BMS.
However, since the voltage information of the battery module needs to be collected by being connected to the FPC through the nickel sheet, the number of connection points is large, and the risk of failure is high.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a sampling subassembly and battery module to because of the more higher problem that leads to taking place the risk of inefficacy of the switching point on the FPC sampling assembly in the battery module of solving among the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a sampling assembly, including: the busbar is used for being connected with the positive electrode or the negative electrode of the battery cell; the circuit board is arranged on one side of the battery cell and positioned between the positive electrode and the negative electrode of the battery cell, and comprises a circuit board main body and a busbar connecting part which is arranged on the circuit board main body and is used for being connected with a busbar so as to transmit voltage information; the circuit board is made of copper, one end of the bus bar connecting part is integrally formed with the circuit board main body, and the other end of the bus bar connecting part is connected with the bus bar in a welding mode.
Further, the welding mode between the busbar connecting part and the busbar is ultrasonic welding.
Further, a glue layer is coated at the welding position between the busbar connecting part and the busbar.
Furthermore, a plurality of strip-shaped grooves which are arranged around one end of the bus bar connecting part at intervals are arranged on the circuit board main body.
Further, an avoiding groove for avoiding the explosion-proof valve of the battery cell is arranged on the circuit board main body.
Further, busbar connecting portion include connecting portion body and the cladding is at this external protection film of connecting portion, is provided with the mouth of dodging that is used for dodging the busbar on the protection film, and the connecting portion body is through dodging mouth and corresponding busbar contact.
Furthermore, the bus bars are multiple, and the circuit board comprises a plurality of bus bar connecting parts which are connected with the bus bars in a one-to-one correspondence manner; and/or the circuit board also comprises a nickel sheet, the circuit board main body is connected with the bus bars in a welding mode through the nickel sheet, and the nickel sheet is provided with a temperature detection component for detecting the temperature of the corresponding bus bars transmitted to the nickel sheet.
Further, the sampling assembly further comprises: the information acquisition module is connected with the circuit board, and the voltage information of electric core loops through busbar and circuit board and then transmits to the information acquisition module.
Further, the thickness of the copper foil substrate used for manufacturing the circuit board is 1.5oz to 2.5oz; and/or the outer part of the busbar connecting part is treated by a tinning process or a gold immersion process; and/or the circuit on the circuit board is processed by adopting a die cutting process.
According to the utility model discloses an on the other hand provides a battery module, including the sampling subassembly, the sampling subassembly is foretell sampling subassembly.
Use the technical scheme of the utility model, the utility model discloses a sampling subassembly includes: the busbar is used for being connected with the positive electrode or the negative electrode of the battery cell; the circuit board is arranged on one side of the battery cell and positioned between the positive electrode and the negative electrode of the battery cell, and comprises a circuit board main body and a bus bar connecting part arranged on the circuit board main body and used for being connected with a bus bar to transmit voltage information; the circuit board is made of copper, one end of the bus bar connecting part is integrally formed with the circuit board main body, and the other end of the bus bar connecting part is connected with the bus bar in a welding mode. Thus, the utility model discloses a circuit board is connected with the busbar through the busbar connecting portion with circuit board main part integrated into one piece and is carried out voltage information's collection, the setting of carrying out voltage information's collection through the welding nickel piece has been cancelled, voltage information transmits from the utmost point post of electric core to rather than the busbar of being connected, then on transmitting the connector through the circuit board, transmit the battery management system through the pencil at last, the quantity of switching point has been reduced, the higher problem of risk that leads to taking place to become invalid because of the switching point on the FPC sampling assembly is more in the battery module among the prior art has been solved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a top view of an embodiment of a battery module having a sampling assembly of the present invention;
fig. 2 shows a partially enlarged view of the battery module shown in fig. 1 at a.
Wherein the figures include the following reference numerals:
1. a bus bar; 2. a circuit board; 21. a circuit board main body; 211. a strip-shaped plate body; 22. a busbar connection portion; 23. a strip-shaped groove; 231. a first bar-shaped groove; 2311. a first tank body; 2312. a second tank body; 2313. a third tank body; 2314. a fourth tank body; 232. a second strip groove; 233. a third strip groove; 24. an avoidance groove; 25. a nickel sheet; 26. a glue layer; 27. a welding area; 3. an electric core; 4. an explosion-proof valve.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, the utility model provides a sampling assembly, include: the bus bar 1 is used for being connected with the positive electrode or the negative electrode of the battery cell 3; the circuit board 2 is arranged on one side of the battery cell 3 and located between the positive electrode and the negative electrode of the battery cell 3, and the circuit board 2 comprises a circuit board main body 21 and a busbar connecting part 22 which is arranged on the circuit board main body 21 and used for being connected with the busbar 1 to transmit voltage information; the circuit board 2 is made of copper, one end of the bus bar connecting portion 22 is integrally formed with the circuit board main body 21, and the other end of the bus bar connecting portion 22 is connected to the bus bar 1 by welding.
Thus, the utility model discloses a circuit board 2 is connected with busbar 1 through the busbar connecting portion 22 with circuit board main part 21 integrated into one piece in order to carry out voltage information's collection, the setting of carrying out voltage information's collection through the welding nickel piece has been cancelled, voltage information transmits from electric core 3's utmost point post rather than the busbar 1 of being connected, then on transmitting the connector through circuit board 2, transmit the battery management system for through the pencil at last, the quantity of switching point has been reduced, the higher problem of risk that leads to taking place to become invalid because of the switching point on the FPC sampling assembly is more among the battery module of having solved among the prior art.
Specifically, the thickness of the copper foil base material for manufacturing the circuit board 2 is 1.5oz to 2.5oz; and/or the outside of the bus bar connection part 22 is treated by a tin plating process or a gold plating process to coat the outside of the bus bar connection part 22 with a tin plating layer or a gold plating layer to enhance the solderability of the bus bar connection part 22; and/or the circuit on the circuit board 2 is processed by adopting a die cutting process; the die cutting process comprises the following specific steps: incoming material inspection → bottom film hole position side-by-side waste material cutting → hot pressing fit copper foil → die cutting line side-by-side waste material cutting → cut film hole position side-by-side waste material cutting → surface film compounding to line → AOI detection (automatic optical detection).
Thus, the utility model discloses a circuit board 2 replaces the flexible line way board FPC who adopts the etching technology to handle the circuit among the prior art through the flexible line way board FDC who adopts cross cutting technology to handle the circuit, has reduced circuit board 2's manufacturing procedure, has reduced required manual work, has reduced the processing cost, and produced copper foil waste material can be retrieved and recycled, and is comparatively friendly to the environment.
Preferably, the copper foil base material used to fabricate the circuit board 2 has a thickness of 2oz to ensure reliability of soldering between the bus bar connection part 22 and the bus bar 1.
Where oz is ounces in imperial units, and 1oz is equal to 36 microns in length.
As shown in fig. 1 and 2, the bus bar connecting portion 22 and the bus bar 1 are welded by ultrasonic welding, and the welding region 27 is a position where the ultrasonic welding is performed.
As shown in fig. 1, a glue layer 26 is coated at the welding position between the bus bar connecting portion 22 and the bus bar 1 to reinforce the connection strength between the bus bar connecting portion 22 and the bus bar 1.
Specifically, the adhesive layer 26 is a UV adhesive (i.e., ultraviolet light curable adhesive, shadowless adhesive).
As shown in fig. 1 and 2, the circuit board main body 21 is provided with a plurality of strip-shaped grooves 23 spaced around one end of the bus bar connecting portion 22, so that the connecting portion between the circuit board main body 21 and the corresponding bus bar connecting portion 22 can be flexibly arranged, so as to buffer the deformation of the battery cells 3 when the battery cells 3 are deformed, and prevent the connecting structure between the corresponding bus bar connecting portion 22 and the corresponding bus bar 1 from being damaged due to the deformation of the battery cells 3.
As shown in fig. 1, the circuit board main body 21 is provided with an escape groove 24 for escaping the explosion-proof valve 4 of the battery cell 3.
Specifically, the circuit board main body 21 includes two strip-shaped plate bodies 211, each strip-shaped plate body 211 extends along the arrangement direction of the plurality of battery cells 3 in the battery module, and the two strip-shaped plate bodies 211 are respectively arranged near the positive electrode and the negative electrode of the battery cells 3; wherein, the one end of two bar plate bodies 211 is passed through the transition connecting plate and is connected, and the equal interval of the remainder of two bar plate bodies 211 sets up to form the groove 24 of dodging of the bar of arranging the direction extension of a plurality of electric cores 3 in the battery module, dodge with explosion-proof valve 4 to each electric core 3.
As shown in fig. 2, the plurality of bar-shaped grooves 23 includes a first bar-shaped groove 231, a second bar-shaped groove 232, and a third bar-shaped groove 233; the first bar groove 231 includes a first groove body 2311, a second groove body 2312 and a third groove body 2313 which are sequentially connected around the end portion of the corresponding bus bar connecting portion 22, the extending direction of the second groove body 2312 is parallel to the extending direction of the circuit board main body 21 and the second groove body 2312 is positioned at one side of the corresponding bus bar connecting portion 22 far away from the corresponding bus bar 1, and the first groove body 2311 and the third groove body 2313 are respectively connected with two ends of the second groove body 2312 and extend towards one side of the second groove body 2312 close to the corresponding bus bar connecting portion 22; the first bar-shaped groove 231 includes a fourth groove body 2314 connected to the middle of the second groove body 2312 and extending toward one side of the second groove body 2312 close to the corresponding bus bar connection part 22, the third groove body 2313 and the fourth groove body 2314 are both disposed at intervals from the outer edge of the circuit board main body 21, and the first groove body 2311 extends to the outer edge of the circuit board main body 21; the second and third bar- shaped grooves 232 and 233 are disposed on the outer edge of the circuit board main body 21 and spaced along the outer edge of the circuit board main body 21, the second and third bar- shaped grooves 232 and 233 extend toward the direction close to the second groove body 2312 and are spaced from the second groove body 2312, and the third bar-shaped groove 233 is located on the side of the second bar-shaped groove 232 away from the corresponding busbar connection portion 22; the first groove body 2311 and the second groove body 2312 are respectively located on two opposite sides of the corresponding busbar connecting portion 22, the second strip-shaped groove 232 and the third strip-shaped groove 233 are both located between the corresponding first groove body 2311 and the corresponding second groove body 2312, and the fourth groove body 2314 is located between the corresponding second strip-shaped groove 232 and the corresponding third strip-shaped groove 233.
The utility model discloses a busbar connecting portion 22 includes connecting portion body and the cladding is at this external protection film of connecting portion, is provided with the mouth of dodging that is used for dodging busbar 1 on the protection film, and the connecting portion body is through dodging mouthful and the contact of corresponding busbar 1 to make copper part and the 1 direct contact of corresponding busbar in the busbar connecting portion 22, in order to guarantee the reliability of the electricity connection between busbar connecting portion 22 and the corresponding busbar 1.
As shown in fig. 1, the bus bar 1 is plural, and the circuit board includes a plurality of bus bar connection portions 22 connected to the plurality of bus bars 1 in one-to-one correspondence; and/or the circuit board 2 further comprises a nickel sheet 25, the circuit board main body 21 is connected with the bus bar 1 through the nickel sheet 25 in a welding mode, and the nickel sheet 25 is provided with a temperature detection component for detecting the temperature transmitted to the nickel sheet 25 by the corresponding bus bar 1 so as to acquire temperature information; one end of the nickel sheet 25 is connected with the circuit board main body 21 by welding, and the other end of the nickel sheet 25 is connected with the corresponding bus bar 1 by welding.
Specifically, the temperature detecting member is an NTC, i.e., a negative temperature coefficient thermistor.
As shown in fig. 1, the plurality of busbars 1 are divided into two busbar combinations, the two busbar combinations are respectively located at two opposite sides of the circuit board main body 21, and the plurality of busbars 1 in each busbar combination are arranged at intervals along the extending direction of the circuit board main body 21; accordingly, the plurality of bus bar connection portions 22 are also divided into two bus bar connection combinations, the two bus bar connection combinations are provided in one-to-one correspondence with the two bus bar combinations, and the plurality of bus bar connection portions 22 in each bus bar connection combination are each connected in one-to-one correspondence with the plurality of bus bars 1 in the corresponding bus bar combination.
Specifically, the utility model discloses a sampling subassembly still includes: the information acquisition module, the information acquisition module is connected with circuit board 2, and the voltage information of electricity core 3 loops through busbar 1 and circuit board 2 back transmission to the information acquisition module.
The utility model also provides a battery module, including the sampling subassembly, the sampling subassembly is foretell sampling subassembly.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
the utility model discloses a sampling subassembly includes: the busbar 1 is used for being connected with the positive electrode and the negative electrode of the battery cell 3; the circuit board 2 is arranged on one side of the battery cell 3 and located between the positive electrode and the negative electrode of the battery cell 3, and the circuit board 2 comprises a circuit board main body 21 and a busbar connecting part 22 which is arranged on the circuit board main body 21 and is used for being connected with the busbar 1 to transmit voltage information; the circuit board 2 is made of copper, one end of the bus bar connecting portion 22 is integrally formed with the circuit board main body 21, and the other end of the bus bar connecting portion 22 is connected to the bus bar 1 by welding. Thus, the utility model discloses a circuit board 2 is connected with busbar 1 through the busbar connecting portion 22 with circuit board main part 21 integrated into one piece in order to carry out voltage information's collection, the setting of carrying out voltage information's collection through the welding nickel piece has been cancelled, voltage information transmits from electric core 3's utmost point post rather than the busbar 1 of being connected, then on transmitting the connector through circuit board 2, transmit the battery management system for through the pencil at last, the quantity of switching point has been reduced, the higher problem of risk that leads to taking place to become invalid because of the switching point on the FPC sampling assembly is more among the battery module of having solved among the prior art.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A sampling assembly, comprising:
the busbar (1) is used for being connected with the positive electrode or the negative electrode of the battery cell (3);
the circuit board (2) is arranged on one side of the battery cell (3) and located between the positive electrode and the negative electrode of the battery cell (3), and the circuit board (2) comprises a circuit board main body (21) and a busbar connecting part (22) which is arranged on the circuit board main body (21) and used for being connected with the busbar (1) to transmit voltage information;
the circuit board (2) is made of copper, one end of the bus bar connecting part (22) is integrally formed with the circuit board main body (21), and the other end of the bus bar connecting part (22) is connected with the bus bar (1) in a welding mode.
2. The sampling assembly according to claim 1, characterized in that the welding between the busbar connection (22) and the busbar (1) is an ultrasonic welding.
3. The sampling assembly according to claim 1, characterized in that the welding position between the busbar connection (22) and the busbar (1) is coated with a glue layer (26).
4. The sampling assembly according to claim 1, characterized in that the circuit board body (21) is provided with a plurality of strip-shaped grooves (23) arranged at intervals around one end of the busbar connection portion (22).
5. The sampling assembly according to claim 1, characterized in that an evacuation groove (24) for evacuating the explosion-proof valve (4) of the cell (3) is provided on the circuit board body (21).
6. The sampling assembly according to claim 1, wherein the busbar connection portion (22) comprises a connection portion body and a protection film covering the connection portion body, wherein an avoidance port for avoiding the busbar (1) is arranged on the protection film, and the connection portion body is in contact with the corresponding busbar (1) through the avoidance port.
7. The sampling assembly of claim 1,
the number of the bus bars (1) is multiple, and the circuit board (2) comprises a plurality of bus bar connecting parts (22) which are connected with the bus bars (1) in a one-to-one correspondence manner; and/or
The circuit board (2) further comprises a nickel sheet (25), the circuit board main body (21) is connected with the bus bars (1) in a welding mode through the nickel sheet (25), and a temperature detection component is arranged on the nickel sheet (25) and used for detecting the temperature of the bus bars (1) transmitted to the nickel sheet (25).
8. The sampling assembly of claim 1, further comprising: the information acquisition module is connected with the circuit board (2), and the voltage information of the battery core (3) is transmitted to the information acquisition module after sequentially passing through the busbar (1) and the circuit board (2).
9. The sampling assembly of any one of claims 1 to 8,
the thickness of the copper foil base material for manufacturing the circuit board (2) is 1.5oz to 2.5oz; and/or
The outer part of the busbar connecting part (22) is treated by a tinning process or a gold immersion process; and/or
The circuit on the circuit board (2) is processed by adopting a die cutting process.
10. A battery module comprising a sampling assembly, wherein the sampling assembly is the sampling assembly of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221696683.5U CN217881815U (en) | 2022-07-01 | 2022-07-01 | Sampling assembly and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221696683.5U CN217881815U (en) | 2022-07-01 | 2022-07-01 | Sampling assembly and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN217881815U true CN217881815U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221696683.5U Active CN217881815U (en) | 2022-07-01 | 2022-07-01 | Sampling assembly and battery module |
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| Country | Link |
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| CN (1) | CN217881815U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116632465A (en) * | 2023-07-19 | 2023-08-22 | 中国第一汽车股份有限公司 | Direct-connection battery module, design method thereof, battery pack and vehicle |
| CN116761378A (en) * | 2023-08-14 | 2023-09-15 | 苏州维信电子有限公司 | Circuit board structure for new energy battery pack and new energy battery pack |
-
2022
- 2022-07-01 CN CN202221696683.5U patent/CN217881815U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116632465A (en) * | 2023-07-19 | 2023-08-22 | 中国第一汽车股份有限公司 | Direct-connection battery module, design method thereof, battery pack and vehicle |
| CN116632465B (en) * | 2023-07-19 | 2023-10-27 | 中国第一汽车股份有限公司 | Direct-connection battery module, design method thereof, battery pack and vehicle |
| CN116761378A (en) * | 2023-08-14 | 2023-09-15 | 苏州维信电子有限公司 | Circuit board structure for new energy battery pack and new energy battery pack |
| CN116761378B (en) * | 2023-08-14 | 2023-11-14 | 苏州维信电子有限公司 | Circuit board structure for new energy battery pack and new energy battery pack |
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