CN213340650U

CN213340650U - Collection system and battery module

Info

Publication number: CN213340650U
Application number: CN202022105747.7U
Authority: CN
Inventors: 陈健宝; 张国江
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-06-01
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to a power battery technical field discloses a collection system and battery module. The collection system is used for monitoring the battery module. The acquisition device comprises a PCB acquisition assembly and an output interface. The PCB is fixed in the battery module. The collection assembly comprises a voltage collection piece, the voltage collection piece comprises a deformation portion and a connecting portion, one end of the connecting portion is electrically connected to one end of the deformation portion, the other end of the connecting portion is electrically connected to a busbar in the battery module, the other end of the deformation portion is electrically connected with the PCB, and the deformation portion can change the distance between the connecting portion and the PCB. The output interface is arranged on the PCB and electrically connected with the PCB for outputting the signals collected by the collecting assembly. The utility model discloses avoided the voltage acquisition piece to break away from the busbar, guaranteed the functional of gathering voltage, avoided the battery module can not normally supply power.

Description

Collection system and battery module

Technical Field

The utility model relates to a power battery technical field especially relates to an acquisition device and battery module.

Background

With the development of new energy technology, the usage amount of electric automobiles is increasing day by day, people put forward higher requirements on the safety and the cruising ability of the electric automobiles, and the key point of battery pack design is to ensure the safety performance of the electric automobiles and simultaneously improve the energy density of power battery packs. At present, the battery module is internally provided with a collecting device which collects the voltage and temperature data of the single battery in real time and avoids the battery from losing efficacy so as to ensure the performance of the vehicle. Generally, a PCB (Printed Circuit Board) is disposed inside the battery module, a voltage collecting plate and an output interface are disposed on the PCB, and one end of the voltage collecting plate extends to the outside of the PCB and is welded to a bus bar inside the battery module. When the battery module receives external extrusion or vibration, the condition that the atress drops appears easily between voltage acquisition piece and the busbar, leads to the user state that can not real-time supervision battery module.

Accordingly, there is a need for a collection device and a battery module for solving the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a collection system and battery module, avoided the voltage acquisition piece to break away from the busbar, guaranteed the functional of gathering voltage, avoided the battery module can not normally supply power.

To achieve the purpose, the utility model adopts the following technical proposal:

an acquisition device for monitoring a battery module, comprising:

the PCB is fixed in the battery module;

the battery module comprises a battery module, a collecting assembly and a connecting part, wherein the collecting assembly comprises a voltage collecting sheet, the voltage collecting sheet comprises a deformation part and a connecting part, one end of the connecting part is electrically connected to one end of the deformation part, the other end of the connecting part is electrically connected to a busbar in the battery module, the other end of the deformation part is electrically connected with the PCB, and the deformation part can change the distance between the connecting part and the PCB;

and the output interface is arranged on the PCB, is electrically connected to the PCB and is used for outputting the signal acquired by the acquisition assembly.

Preferably, the PCB includes a first PCB and a second PCB, the first PCB is electrically connected to the second PCB, the first PCB and the second PCB are respectively fixed to the end plates at the two ends of the battery module, and the output interface is disposed on the first PCB and electrically connected to the first PCB.

Preferably, the collection device further comprises an FFC connection line, and the first PCB and the second PCB are electrically connected through the FFC connection line.

Preferably, the PCB board is provided with a positioning hole, and the positioning hole is used for determining the position of the PCB board on the battery module.

Preferably, the collection assembly further comprises a temperature collection unit, the temperature collection unit is electrically connected to the PCB, and the temperature collection unit is used for detecting the temperature of the single battery in the battery module.

Preferably, the temperature acquisition unit comprises a temperature probe attached to the single battery.

Preferably, a heat-conducting glue is arranged between the temperature measuring probe and the single battery.

Preferably, the temperature measuring probe is in a drop shape.

Preferably, the deformation portion is wavy.

A battery module comprises the collecting device.

The utility model has the advantages that: the voltage acquisition piece includes deformation portion and connecting portion, and when the battery module received outside extrusion or vibration, deformation portion can change the distance between connecting portion and the PCB board, has certain shock attenuation effect, has avoided the voltage acquisition piece to break away from the busbar, has guaranteed the functional of gathering voltage for the voltage of the battery module that collection device can gather all the time has avoided the battery module can not normally supply power.

Drawings

Fig. 1 is a schematic structural diagram of a first view angle of an acquisition device provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a second viewing angle of the collecting device according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a third viewing angle of the collecting device according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 6 is a schematic view of a partial structure of a battery module according to an embodiment of the present invention;

fig. 7 is a partially enlarged view at B in fig. 6.

In the figure:

100. a battery module; 10. a single battery; 20. an end plate; 30. a protective cover; 40. aluminum bars;

1. a PCB board; 11. a first PCB board; 12. a second PCB board;

2. a voltage acquisition sheet; 21. a deformation section; 22. a connecting portion;

3. an output interface;

4. FFC connecting lines;

5. positioning holes;

6. a temperature measuring probe.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

This embodiment provides a collection system for monitoring battery module has avoided the voltage acquisition piece to break away from the busbar, has guaranteed the functional of gathering voltage, has avoided battery module can not normally supply power.

Specifically, as shown in fig. 1-4, the acquisition device includes a PCB board 1, an acquisition assembly, and an output interface 3. The PCB board 1 is fixed in the battery module. Gather the subassembly and include voltage acquisition piece 2, voltage acquisition piece 2 includes deformation portion 21 and connecting portion 22, and the one end electricity of connecting portion 22 is connected in the one end of deformation portion 21, and the other end electricity of connecting portion 22 is connected in the busbar in the battery module, and the other end and the 1 electricity of PCB board of deformation portion 21 are connected, and deformation portion 21 can change the distance between connecting portion 22 and the PCB board 1. The output interface 3 is arranged on the PCB board 1 and electrically connected to the PCB board 1 for outputting the signal collected by the collecting component. Voltage acquisition piece 2 includes deformation portion 21 and connecting portion 22, and when the battery module received outside extrusion or vibration, deformation portion 21 can change the distance between connecting portion 22 and PCB board 1, has certain shock attenuation effect, has avoided voltage acquisition piece 2 to break away from the busbar, has guaranteed the functional of gathering voltage for the voltage of the battery module that collection device can gather all the time has avoided the battery module can not normally supply power. In the present embodiment, the connecting portion 22 is welded to the bus bar.

Preferably, the deformation portion 21 is wavy, so that the shock absorption effect is ensured, and the processing is facilitated. The deformable portion 21 is integrally formed with the connecting portion 22. The voltage acquisition sheet 2 is made of nickel, and the nickel sheet is in an M soft state.

Further, the PCB board 1 includes a first PCB board 11 and a second PCB board 12. First PCB board 11 electricity is connected in second PCB board 12, and first PCB board 11 and second PCB board 12 are fixed respectively on the end plate at battery module both ends, and output interface 3 arranges in on first PCB board 11 and the electricity is connected in first PCB board 11. Set up two PCB boards 1 and be convenient for pass through voltage acquisition piece 2 with the busbar at battery module both ends and be connected, reduced the inside unnecessary line of walking of battery module.

In this embodiment, two voltage collecting plates 2 are fixed on the first PCB 11, and three voltage collecting plates 2 are fixed on the second PCB 12. In other embodiments, the number of the voltage collecting tabs 2 is determined according to the number of the actual unit cells.

Specifically, the acquisition device further includes an FFC connection line 4(Flexible Flat Cable). The first PCB 11 and the second PCB 12 are electrically connected by the FFC connection line 4. Because FFC connecting wire 4 has advantages such as soft, the bending is folding at will, thickness is thin, small, connect simple, dismantle convenient, and low cost is convenient for buckle at will inside the battery module, has promoted space utilization. In this embodiment, the FFC connection line 4 is electrically connected with the PCB board 1 through the FFC connector, which reduces the difficulty of welding and labor cost.

Preferably, the PCB board 1 is provided with a positioning hole 5, the positioning hole 5 is used for determining the position of the PCB board 1 on the battery module, the PCB board 1 is convenient to position, and the time for installing the collecting device on the battery module is shortened. In the present embodiment, the first PCB 11 and the second PCB 12 are both provided with positioning holes 5.

Preferably, the collection subassembly still includes the temperature acquisition unit, and the temperature acquisition unit electricity is connected in PCB board 1, and the temperature acquisition unit is used for detecting the temperature of the battery cell in the battery module. The collection assembly can collect the voltage of the battery module and can also collect the temperature of the single battery in the battery module, the state of the battery module is judged by using the voltage and the temperature value, the use safety of the battery module is improved, and the problem that the battery module cannot normally supply power is avoided.

Specifically, the temperature acquisition unit includes a temperature probe 6. Temperature probe 6 pastes and establishes on battery cell, directly pastes temperature probe 6 and establishes on battery cell, and the temperature of the battery cell of collection that can be accurate has improved the accuracy of temperature acquisition numerical value, has improved the safety in utilization of battery module, has avoided the battery module can not normally supply power. The temperature measuring probe 6 is electrically connected with the first PCB 11 through a temperature sensing connector.

Preferably, be equipped with the heat conduction between temperature probe 6 and the battery cell and glue, the heat conduction glues viscidity and heat conductivity concurrently, can enough fix temperature probe 6 on the battery cell, has guaranteed the temperature of the battery cell that temperature probe 6 can be accurate collection again, has improved the safety in utilization of battery module, has avoided the battery module can not normally supply power.

Preferably, temperature probe 6 is the water droplet form, and temperature probe 6 adopts the encapsulation shape of water droplet form, and the extrusion that comes from the outside can be better born, has reduced the probability of temperature probe 6's damage, has guaranteed the functionality of temperature acquisition unit, has improved the security that the battery module used, has also reduced collection system's maintenance replacement cost.

The embodiment also provides a battery module 100 comprising the collecting device. Specifically, as shown in fig. 5 to 7, the battery module 100 includes the unit batteries 10, the end plates 20, the protective cover 30, and the aluminum row 40. The end plates 20 are disposed at both ends of the battery module 100. The aluminum bars 40 are bus bars and fixed on the end plates 20, and the aluminum bars 40 are arranged on both the two end plates 20. The unit cells 10 are placed inside the battery module 100, and the aluminum bars 40 are electrically connected to the unit cells 10. The protective cover 30 covers a side of the end plate 20 opposite to the unit cells 20. The first PCB 11 and the second PCB 12 are fixed on the two end plates 20, respectively, and are disposed between the protective cover 30 and the end plates 20, and the aluminum row 40 is also disposed between the protective cover 30 and the end plates 20. The PCB board 1 and the aluminum row 40 are sequentially arranged from top to bottom, so that the space of the battery module 100 is reasonably utilized, and the compactness of the structure is improved. The middle part of the upper end of the end plate 20 is fixed to the PCB board 1, and the output interface 3 on the PCB board 1 faces to the left end or the right end of the battery module 100, so that the signal output lines collected by the output collecting device are wired from the two ends of the battery module 100, the redundant space of the battery module 100 is further utilized, and the space utilization rate is improved. In the present embodiment, four single batteries 10 are provided in the battery module 100.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides an acquisition device for monitor battery module, its characterized in that includes:

the PCB (1), the said PCB board (1) is fixed in the said battery module;

the collecting assembly comprises a voltage collecting piece (2), the voltage collecting piece (2) comprises a deformation part (21) and a connecting part (22), one end of the connecting part (22) is electrically connected to one end of the deformation part (21), the other end of the connecting part (22) is electrically connected to a busbar in the battery module, the other end of the deformation part (21) is electrically connected with the PCB (1), and the deformation part (21) can change the distance between the connecting part (22) and the PCB (1);

the output interface (3) is arranged on the PCB (1), is electrically connected to the PCB (1) and is used for outputting the signals collected by the collecting assembly.

2. The collecting device according to claim 1, wherein the PCB board (1) comprises a first PCB board (11) and a second PCB board (12), the first PCB board (11) is electrically connected to the second PCB board (12), the first PCB board (11) and the second PCB board (12) are respectively fixed on the end plates at two ends of the battery module, and the output interface (3) is disposed on the first PCB board (11) and electrically connected to the first PCB board (11).

3. The pickup apparatus as claimed in claim 2, further comprising an FFC connection line (4), wherein the first PCB board (11) and the second PCB board (12) are electrically connected by the FFC connection line (4).

4. The collecting device according to claim 1, wherein the PCB (1) is provided with a positioning hole (5), and the positioning hole (5) is used for determining the position of the PCB (1) on the battery module.

5. The collection device according to claim 1, wherein the collection assembly further comprises a temperature collection unit electrically connected to the PCB (1), and the temperature collection unit is used for detecting the temperature of the single batteries in the battery module.

6. The collection device according to claim 5, wherein the temperature collection unit comprises a temperature probe (6), and the temperature probe (6) is attached to the single battery.

7. The acquisition device according to claim 6, characterized in that a heat-conducting glue is arranged between the temperature probe (6) and the single battery.

8. The collecting device according to claim 6, characterized in that the temperature probe (6) is drop-shaped.

9. The acquisition device according to claim 1, characterized in that said deformation (21) is undulated.

10. A battery module comprising the collecting device according to any one of claims 1 to 9.