CN220569918U - Flexible circuit board assembly for collecting voltage of battery module and battery module - Google Patents
Flexible circuit board assembly for collecting voltage of battery module and battery module Download PDFInfo
- Publication number
- CN220569918U CN220569918U CN202321839434.1U CN202321839434U CN220569918U CN 220569918 U CN220569918 U CN 220569918U CN 202321839434 U CN202321839434 U CN 202321839434U CN 220569918 U CN220569918 U CN 220569918U
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- China
- Prior art keywords
- battery module
- circuit board
- flexible circuit
- voltage
- connecting strip
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 238000005476 soldering Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a flexible circuit board assembly for collecting voltage of a battery module and the battery module, which comprise a flexible circuit board, a connector and a plurality of voltage collecting terminals, wherein the connector is arranged at one end of the flexible circuit board, one ends of the voltage collecting terminals are welded on the flexible circuit board and are electrically connected with the connector, the other ends of the voltage collecting terminals are welded on a busbar of the battery module, the voltage collecting terminals comprise a first rectangular end, a second rectangular end and a snake-shaped connecting strip connected between the first rectangular end and the second rectangular end, and hollow grooves which are the same as the snake-shaped connecting strip in shape are formed in the middle of the snake-shaped connecting strip, so that a double snake-shaped connecting strip is formed. The voltage acquisition terminal is composed of nickel plates. According to the utility model, under the condition that the battery module is subjected to the maximum expansion force, the voltage acquisition points of the FPC are firmly connected, and the welded nickel sheet can play a role in flexible buffering, so that the voltage monitoring reliability of the battery module is improved, and the space utilization rate of the battery module is improved.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a flexible circuit board assembly for collecting voltage of a battery module and the battery module.
Background
In the present power battery system, the battery module is responsible for providing energy for the load, as shown in fig. 1 and 2, the most commonly used voltage sampling structure in the battery module is a traditional form of soldering a plurality of rectangular voltage acquisition terminals 3 on a flexible circuit board 1 (FPC), the voltage acquisition terminals usually adopt nickel sheets, the nickel sheets are connected to a busbar of the battery module through laser welding, so that voltage acquisition of the battery module is realized, but the battery module has the characteristic of deformation expansion after being recycled, so that the laser welding point or the soldering welding point of the nickel sheets can be stressed and pulled, and particularly in a high-intensity vibration environment, the laser welding point or the soldering welding point of the nickel sheets are very easy to fall off, and potential safety hazards exist. As shown in fig. 3, the existing FPC improvement strategy is based on a body of FPC material, on which a flexible buffer tape 4 is formed by cutting "wings" at the expense of the substrate width, which is 2-3 times the wiring width. However, along with the development trend of large power battery modules, the method has higher requirements on the width of the FPC and the number of voltage collection, and the existing FPC scheme has low width utilization rate of the base material and low space utilization rate of the battery module, and is not suitable for voltage sampling of the battery module under the large module.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a flexible circuit board assembly for collecting the voltage of a battery module and the battery module, and the flexible circuit board assembly and the battery module improve the voltage monitoring reliability of the battery module and the space utilization rate of the battery module.
In order to solve the technical problems, the utility model adopts the following technical scheme: a flexible circuit board assembly for battery module voltage acquisition, includes flexible circuit board, connector, a plurality of voltage acquisition terminal, and the connector sets up in flexible circuit board one end, and a plurality of voltage acquisition terminal one end welding is at flexible circuit board and with connector electric connection, and the other end welds on connecting the aluminium busbar that converges of battery module, voltage acquisition terminal include with the flexible circuit board welded first rectangle end of rectangle, with the aluminium busbar welded second rectangle end of battery module, connect the snakelike connecting strip between first rectangle end and second rectangle end, open in the middle of the snakelike connecting strip have with snakelike connecting strip the fretwork fluting that the shape was walked the same, form two snakelike connecting strips.
The voltage acquisition terminals are welded with the flexible circuit board through tin soldering, and are welded with the busbar aluminum of the battery module through laser.
The voltage acquisition terminal is formed by nickel plates.
The connecting strip is double-S-shaped and is respectively and smoothly connected with the first rectangular end and the second rectangular end.
A battery module adopting the voltage acquisition flexible circuit board assembly.
The beneficial effects of the utility model are as follows: according to the utility model, under the condition that the battery module is subjected to the maximum expansion force, the voltage acquisition points of the FPC are firmly connected, and the welded nickel sheet can play a role in flexible buffering, so that the voltage monitoring reliability of the battery module is improved, the flat cable utilization rate of the FPC under the same material width is increased, and the space utilization rate of the battery module is improved.
Drawings
Fig. 1 is a schematic structure of a prior art unbuffered FPC.
Fig. 2 is a schematic structural view of a conventional rectangular voltage collecting terminal of the prior art.
Fig. 3 is a schematic diagram of a prior art FPC substrate body with a buffer structure thereon.
Fig. 4 is a schematic structural view of a dual S-shaped voltage acquisition terminal of the present utility model.
Fig. 5 is a schematic structural view of a flexible circuit board assembly for battery module voltage acquisition according to the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The working principle of the flexible circuit board assembly for collecting the voltage of the battery module is the same as that of the prior art, and reference can be made to the prior art, so that description is not made, the difference between the flexible circuit board assembly and the prior art is that the structure of the voltage collecting terminal is different, and the following detailed description is made:
as shown in fig. 4 and 5, the flexible circuit board assembly for collecting voltage of the battery module of the utility model comprises a flexible circuit board 1, a connector 2 and a plurality of voltage collecting terminals 3, wherein the connector 2 is arranged at one end of the flexible circuit board 1, one end of each voltage collecting terminal 3 is welded on the flexible circuit board 1 and is electrically connected with the connector 2, and the other end of each voltage collecting terminal 3 is welded on a busbar aluminum of the battery module, and the flexible circuit board assembly is characterized in that the voltage collecting terminals 3 comprise a first rectangular end 9 welded with the rectangular flexible circuit board 1, a second rectangular end 7 welded with the busbar aluminum of the battery module, and a snake-shaped connecting strip 8 connected between the first rectangular end 9 and the second rectangular end 7, and a hollow groove 10 which is the same as the snake-shaped connecting strip in shape is formed in the middle of the snake-shaped connecting strip 8, so as to form a double snake-shaped connecting strip 8.
Preferably, the plurality of voltage collecting terminals 3 are soldered to the flexible circuit board 1 by soldering, and are soldered to the aluminum busbar of the battery module by laser.
The voltage acquisition terminal 3 is formed by nickel plates.
In this embodiment, the connecting strip 8 is S-shaped and is smoothly connected to the first rectangular end 9 and the second rectangular end 7 respectively.
The battery module adopting the voltage acquisition flexible circuit board assembly.
According to the utility model, the double-S-shaped voltage acquisition terminal is designed to have a flexible stretching characteristic, after being welded on the FPC, the nickel sheet and the battery module busbar are welded together by laser, and after the battery circularly generates expansion force, the double-S-shaped structure can deform, so that the expansion stress is counteracted, and the reliable and unstressed connection of the welding point is ensured.
In this embodiment, as shown in fig. 4, a double "S" shaped connecting strip 8 is machined in the middle of a square nickel sheet by means of die stamping, the thickness of the nickel sheet is generally 0.1mm-0.3mm, and the width of the double "S" shaped connecting strip of the nickel sheet is 1mm. One end of the nickel sheet of the double-S structure is a second rectangular end 7 welded with the battery module busbar aluminum bar by laser, and the other end is a first rectangular end 9 welded with the FPC flexible circuit board by soldering. One end of the first rectangular end 9 is placed on a bonding pad of the FPC flexible circuit board for soldering connection, and the second rectangular end 7 is placed on a battery module busbar aluminum for laser welding.
According to the utility model, the nickel sheet of the battery module FPC is improved, the voltage acquisition structure of the FPC is not damaged under the condition that the battery module is subjected to the maximum expansion force, the connection reliability of the nickel sheet for FPC voltage acquisition and the laser welding point of the bus bar of the battery module is improved under the strong vibration use environment, the number of voltage sampling wires can be increased under the condition of the same width of the FPC base material, the battery module is suitable for the trend of large battery modules in a power battery system, and the voltage monitoring reliability of the battery module is improved.
The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present utility model are still within the scope of the present utility model.
Claims (4)
1. The utility model provides a flexible circuit board subassembly for battery module voltage acquisition, includes flexible circuit board (1), connector (2), a plurality of voltage acquisition terminal (3), and connector (2) set up in flexible circuit board (1) one end, and a plurality of voltage acquisition terminal (3) one end welding is at flexible circuit board (1) and with connector (2) electric connection, and the other end welds on connecting the aluminium busbar of battery module, a serial communication port, voltage acquisition terminal (3) include with flexible circuit board (1) welded first rectangle end (9) of rectangle, with aluminium busbar welded second rectangle end (7) of battery module, connect serpentine connecting strip (8) between first rectangle end (9) and second rectangle end (7), open in the middle of serpentine connecting strip (8) have with serpentine connecting strip shape the same fretwork fluting (10), form two serpentine connecting strip rounding off (8), connecting strip (8) are two S shapes, are connected with first rectangle end (9) and second rectangle end (7) respectively.
2. The flexible circuit board assembly for voltage collection of a battery module according to claim 1, wherein the plurality of voltage collection terminals (3) are soldered to the flexible circuit board (1) by soldering and are soldered to a bus bar of the battery module by laser.
3. The flexible circuit board assembly for voltage acquisition of a battery module according to claim 1, wherein the voltage acquisition terminal (3) is formed by a nickel plate.
4. A battery module employing the voltage acquisition flexible circuit board assembly of any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321839434.1U CN220569918U (en) | 2023-07-13 | 2023-07-13 | Flexible circuit board assembly for collecting voltage of battery module and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321839434.1U CN220569918U (en) | 2023-07-13 | 2023-07-13 | Flexible circuit board assembly for collecting voltage of battery module and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220569918U true CN220569918U (en) | 2024-03-08 |
Family
ID=90103819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321839434.1U Active CN220569918U (en) | 2023-07-13 | 2023-07-13 | Flexible circuit board assembly for collecting voltage of battery module and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220569918U (en) |
-
2023
- 2023-07-13 CN CN202321839434.1U patent/CN220569918U/en active Active
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