CN216903249U

CN216903249U - Power battery module with low pressure collection system

Info

Publication number: CN216903249U
Application number: CN202220564693.7U
Authority: CN
Inventors: 韩敏; 张宏飞; 薛泽锋; 付垚
Original assignee: Huading Guolian Power Battery Co ltd
Current assignee: Huading Guolian Power Battery Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-07-05
Anticipated expiration: 2032-03-15

Abstract

A power battery module with a low-voltage acquisition device comprises the low-voltage acquisition device and a battery module, wherein the low-voltage acquisition device comprises an FPC (flexible printed circuit) board, an acquisition nickel sheet, a connector, a reinforcing plate and a temperature sensor; the FPC is I-shaped, one end of the FPC is provided with a connector, and the connecting end is bonded with a reinforcing plate; two ends of the FPC are respectively welded with a plurality of collecting nickel sheets, and each nickel sheet is connected with the connector through a circuit; welding part of the collecting nickel plates with a bus copper bar of the battery module, and collecting voltage signals; the other nickel sheets are bonded on each electric core through heat-conducting glue and connected with the temperature sensor through a connector; the connector is connected with a battery management system outside the module. The device adopts integral type FPC flexible circuit board, can promote battery energy density, convenient automated production assembly, promotes the reliability of battery module work simultaneously.

Description

Power battery module with low pressure collection system

Technical Field

The utility model relates to a power battery module, and belongs to the technical field of electric automobile battery modules.

Background

In the current electric automobile, a power battery pack is responsible for providing energy for the whole automobile. The power battery pack generally comprises a box body, a battery module, a BMS (battery management system), a high-voltage power distribution unit, a cooling system and the like. The BMS, which is equivalent to a core control unit of the battery pack, is mainly responsible for monitoring, controlling and protecting various parameters of the battery. The single voltage and temperature signal of the battery are the basis for realizing each function of the BMS. And the device responsible for collecting the cell voltage and temperature signals and transmitting them to the BMS is called a low voltage collecting device. The low-voltage acquisition device can be divided into an inner part and an outer part of the module according to the installation position. The common low pressure collection device is traditional pencil form in the module at present, and the temperature acquisition point or the voltage acquisition point of electricity core are connected to one end adoption spiro union mode, and another termination module external low pressure collection device after reconnection BMS. The contact resistance of the acquisition device in the form at the acquisition point is larger, and the reliability is poorer. And the automation can not be realized only by manual assembly, and the production efficiency is lower.

The FPC refers to a flexible circuit board, also called a flexible circuit board or a flexible circuit board, which takes polyimide or polyester film as a base material, and the circuit made of the material can be bent at will, and has the advantages of light folding weight, small volume, good heat dissipation and convenient installation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power battery module with a low-voltage acquisition device, wherein the low-voltage acquisition device adopts an integrated FPC (flexible printed circuit), so that the energy density of a battery can be improved, the automatic production and assembly are facilitated, and the working reliability of the battery module is improved.

In order to achieve the purpose, the utility model comprises the following technical scheme:

a power battery module with a low-voltage acquisition device comprises the low-voltage acquisition device and a battery module 5;

the low-voltage acquisition device comprises an FPC (flexible printed circuit) 2, an acquisition nickel sheet 1, a connector 3, a reinforcing plate 4 and a temperature sensor;

the FPC 2 is I-shaped, one end of the FPC is provided with a connector 3, and the connecting end is bonded with a reinforcing plate 4;

two ends of the FPC (flexible printed circuit) 2 are respectively welded with a plurality of collecting nickel sheets 1, and each nickel sheet 1 is connected with a connector 3 through a circuit; welding part of the collecting nickel sheets with a bus bar 6 of the battery module 5, and collecting voltage signals; the rest nickel sheets are bonded on each electric core of the battery module through heat-conducting glue and are connected with the temperature sensor through the connector 3;

the connector 3 is connected to a battery management system outside the module.

As mentioned above, the connector 3 is preferably an automobile-grade connector socket.

In the power battery module as described above, preferably, the temperature sensor is a thermistor.

As above power battery module, preferably, the FPC flexible circuit board 2 is tiled on the top of the battery module 5, and both ends of the FPC flexible circuit board are bent and then attached to the frames on both sides of the battery module, and the collection nickel plate 1 is welded to the bus copper bars 6 on the frames on both sides, or is bonded to the battery core by a heat conducting adhesive.

The utility model has the beneficial effects that: the low-voltage acquisition device of the power battery module adopts the integrated FPC flexible circuit board, so that the weight of the battery module can be reduced, the energy density is improved, the automatic production and assembly are facilitated, meanwhile, the flexibility of the FPC can absorb the stress and energy during vibration, and the working reliability of the battery module is improved. The voltage and temperature signals in the module are uniformly concentrated in the connector. The BMS outside the module can realize real-time monitoring in the module only by accessing the connector.

Drawings

Fig. 1 is a schematic structural view of a low-voltage collection device of a power battery module in embodiment 1.

Fig. 2 is an exploded schematic view of a low-voltage collection device of a power battery module in embodiment 1.

Fig. 3 is an exploded view of the low voltage collecting device and the battery module.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Embodiment 1 Power Battery Module

Low-voltage acquisition device of power battery module

As shown in fig. 1 and 2, the low voltage collecting device of the power battery module comprises an FPC flexible circuit board 2, a collecting nickel sheet 1, a connector 3, a reinforcing plate 4 and a temperature sensor.

The FPC flexible circuit board 2 is in an I shape, and a plurality of collecting nickel sheets 1 are welded at two ends of the FPC flexible circuit board. Welding part of the collecting nickel sheets with a bus bar 6 of the battery module 5, and collecting voltage signals; the rest nickel sheets are bonded on each battery cell through heat conducting glue, and are connected with a temperature sensor through an FPC flexible circuit board to acquire the temperature of the battery cells, wherein the temperature sensor can be a thermistor.

One end of the FPC flexible circuit board 2 is connected to a connector 3, and the connection end is bonded to a reinforcing plate 4. The connector 3 may be an automotive grade connector receptacle, such as a 14Pin connector, the connector 3 being connected to an off-module Battery Management System (BMS).

Two, have low pressure collection system's power battery module

As shown in fig. 3, the power battery module is composed of an FPC flexible circuit board 2 and a battery module 5. When the module assembly, FPC flexible circuit board 2 tiling is at 5 tops of battery module, and the laminating is on battery module both sides frame after the both ends are crooked, gathers the copper bar 6 welding that converges on nickel piece 1 and the both sides frame, gathers voltage signal, is connected to connector 3 through FPC's circuit. The other part of the acquisition nickel sheet 1 is bonded on the battery core through a heat conducting adhesive, acquires the temperature of the nickel sheet and connects the temperature signal to the connector 3 through an FPC circuit. Thus, the voltage and temperature signals in the module are uniformly concentrated in the connector. The BMS outside the module can realize real-time monitoring in the module only by accessing the connector.

Claims

1. A power battery module with a low-voltage acquisition device is characterized by comprising the low-voltage acquisition device and a battery module (5);

the low-voltage acquisition device comprises an FPC (flexible printed circuit) board (2), an acquisition nickel sheet (1), a connector (3), a reinforcing plate (4) and a temperature sensor;

the FPC flexible circuit board (2) is I-shaped, one end of the FPC flexible circuit board is provided with a connector (3), and the connecting end is bonded with a reinforcing plate (4);

two ends of the FPC (2) are respectively welded with a plurality of collecting nickel sheets (1), and each nickel sheet (1) is connected with a connector (3) through a circuit; welding part of the collecting nickel sheets with a bus copper bar (6) of the battery module (5) and collecting voltage signals; the rest nickel sheets are bonded on each electric core of the battery module through heat-conducting glue and are connected with the temperature sensor through a connector (3);

the connector (3) is connected with a battery management system outside the module.

2. The power battery module according to claim 1, characterized in that the connector (3) is an automotive grade connector socket.

3. The power battery module as claimed in claim 1, wherein the temperature sensor is a thermistor.

4. The power battery module as set forth in any one of claims 1-3, wherein the FPC flexible circuit board (2) is laid on top of the battery module (5), two ends of the FPC flexible circuit board are bent and then attached to frames on two sides of the battery module, and the collecting nickel plate (1) is welded with the bus bars (6) on the frames on the two sides, or is bonded on the battery core through a heat conducting adhesive.