CN220963687U - Voltage acquisition assembly, battery module and battery pack - Google Patents

Abstract

The application relates to the technical field of power batteries, in particular to a voltage acquisition assembly, a battery module and a battery pack. The voltage acquisition assembly comprises an acquisition PCB, a busbar and an acquisition connecting sheet, wherein the acquisition connecting sheet is clamped on the battery cell bracket, and two ends of the acquisition connecting sheet are respectively and electrically connected with the acquisition PCB and the busbar so as to realize voltage acquisition. The application realizes voltage acquisition through the independently arranged acquisition connecting sheet, has small occupied space, is beneficial to improving the energy density of the battery pack, has small dead weight and is beneficial to the lightweight design of the battery pack; meanwhile, the electric core bracket is not easy to bend and damage in the transportation and installation processes, and the collecting connecting piece can be clamped on the electric core bracket so as to position the collecting connecting piece through the electric core bracket, so that the problem that the collecting connecting piece is not connected in place due to dislocation in the assembly process is avoided, and the stability of electric core voltage collection is ensured.

Description

Voltage acquisition assembly, battery module and battery pack

Technical Field

The application relates to the technical field of power batteries, in particular to a voltage acquisition assembly, a battery module and a battery pack.

Background

In the current battery pack, the voltage of the battery module is collected by means of a wire harness, namely, a collection circuit of the battery cell busbar and the PCB is connected through the wire harness, but the wire harness occupies a large space, has a large dead weight and is high in cost, and the requirement of light weight of the battery pack cannot be met; the other is that a busbar with a leading-out lug is adopted and welded to a PCB (printed circuit board) through the leading-out lug so as to realize electric connection, but the busbar with the leading-out lug is easy to deform in the processes of transportation and production and assembly, so that the problems of falling off, false welding and the like are frequently caused during welding.

Disclosure of utility model

The utility model aims to provide a voltage acquisition assembly, a battery module and a battery pack, so as to provide a safe and reliable battery cell voltage acquisition structure with small occupied space, light weight and low cost.

The utility model provides a voltage acquisition assembly, comprising:

The acquisition PCB is fixedly arranged on one side of the battery cell bracket of the battery module;

The busbar and the acquisition PCB are positioned on the same side of the battery cell bracket, and two ends of the busbar are respectively and electrically connected with the lugs of the two battery cells of the battery module so as to connect the two battery cells in series;

The collection connection piece, the collection connection piece card is located on the electric core support, the one end of collection connection piece forms first connecting portion, first connecting portion with the busbar is relative and the electricity is connected, the other end of collection connection piece forms second connecting portion, second connecting portion with gather PCB is relative and the electricity is connected.

Further, the acquisition PCB is electrically connected with an acquisition touch piece, and the acquisition touch piece is opposite to the acquisition connecting piece and is electrically connected with the acquisition connecting piece.

Further, the collecting bump piece is a nickel piece, and is fixed on the collecting PCB through soldering tin so as to be electrically connected with the collecting PCB.

Further, the laser welding is adopted between the bus bar and the lugs of the two battery cores, between the second connecting part of the collecting connecting piece and the collecting collision piece, and between the first connecting part of the collecting connecting piece and the bus bar.

Further, the collecting connecting piece is formed with a clamping notch between the first connecting portion and the second connecting portion, the battery cell support is provided with a positioning rib, and the positioning rib is inserted into the clamping notch.

Further, the cell support surrounds the busbar is formed with a limiting groove, the limiting groove is formed with an opening at the collecting connecting sheet, and a side plate of the limiting groove at the opening forms the positioning rib.

Further, a cambered buffer part is formed in the middle of the busbar, and the busbar is electrically connected with the acquisition connecting sheet through the buffer part.

Further, the thickness of the bus bar is 1mm-2mm, and the bus bar is made of aluminum or copper; the collecting connecting sheet is a nickel sheet.

The utility model also provides a battery module, which comprises any one of the voltage acquisition components.

The utility model also provides a battery pack, which comprises the battery module.

Compared with the prior art, the utility model has the beneficial effects that:

The utility model provides a voltage acquisition assembly which comprises an acquisition PCB, a busbar and an acquisition connecting sheet, wherein the acquisition PCB is fixedly arranged on one side of a battery cell bracket of a battery module; the busbar and the acquisition PCB are positioned on the same side of the battery cell bracket, and the busbar is used for connecting two adjacent battery cells in the battery module in series. The collecting connection piece is a sheet-shaped connecting piece which is independently arranged relative to the bus bar and the collecting PCB, one end of the collecting connection piece is a first connecting part, the other end of the collecting connection piece is a second connecting part, the collecting connection piece is clamped on the battery cell support, the first connecting part of the collecting connection piece is fixedly connected to the bus bar relative to the bus bar, so that the collecting connection piece is electrically connected with the bus bar, the second connecting part of the collecting connection piece is fixedly connected to the collecting PCB relative to the collecting PCB, the collecting connection piece is electrically connected with the collecting PCB, and the collecting PCB is electrically connected with the bus bar through the collecting connection piece, so that the collecting PCB can conduct voltage collection on the battery cells connected to the bus bar in series.

Compared with the traditional mode of connecting the busbar and the acquisition PCB by utilizing the wire harness, the acquisition connecting piece disclosed by the application is small in occupied space, beneficial to improving the energy density of the battery pack, small in dead weight and beneficial to the lightweight design of the battery pack. Meanwhile, compared with the traditional mode that the bus bar is electrically connected with the acquisition PCB through the leading-out lugs, the application adopts the independently arranged acquisition connecting pieces, compared with the leading-out lugs, in the transportation and subsequent installation processes, the bus bar is not easy to bend and damage, so that the electric connection between the bus bar and the acquisition PCB is firmer, and the acquisition connecting pieces can be clamped on the battery cell bracket when the bus bar is connected with the acquisition PCB, so that the acquisition connecting pieces are positioned through the battery cell bracket, the problem of incomplete connection caused by dislocation of the acquisition connecting pieces during assembly is avoided, and the stability of the acquisition of the voltage of the battery cell is ensured.

The utility model also provides a battery module and a battery pack comprising the battery module, wherein the battery module comprises the voltage acquisition assembly, so the battery module and the battery pack comprising the battery module also have the beneficial effects of the voltage acquisition assembly.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a voltage acquisition assembly according to an embodiment of the present utility model;

Fig. 2 is a schematic structural view of an acquisition connection piece of the pressure acquisition assembly according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a busbar of a voltage acquisition assembly according to an embodiment of the present utility model.

Reference numerals:

The device comprises a 1-acquisition PCB, a 2-acquisition connecting sheet, a 21-first connecting part, a 22-second connecting part, a 23-clamping notch, a 3-busbar, a 31-buffer part, a 4-cell bracket, a 41-positioning rib and a 5-acquisition collision sheet.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships 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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" 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," "connected," and "connected" 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.

A voltage acquisition assembly, a battery module, and a battery pack according to some embodiments of the present application are described below with reference to fig. 1 to 3.

The application provides a voltage acquisition assembly, as shown in fig. 1, which comprises an acquisition PCB1, a busbar 3 and an acquisition connecting sheet 2, wherein the acquisition PCB1 is fixedly arranged on one side of a cell support 4 of a battery module, for example, the acquisition PCB1 is fixedly connected to the cell support 4 through a fastening screw; the busbar 3 and the acquisition PCB1 are positioned on the same side of the cell support 4, and the busbar 3 is used for connecting two adjacent cells in the battery module in series, namely one end of the busbar 3 is electrically connected with the positive lug of one cell, and the other end of the busbar 3 is electrically connected with the negative lug of the other cell.

The collection connection piece 2 is the sheet-like connecting piece that relative busbar 3 and collection PCB1 set up independently, the one end of collection connection piece 2 is for forming first connecting portion 21, the other end of collection connection piece 2 forms second connecting portion 22, the collection connection piece 2 card is located on the electric core support 4, and the first connecting portion 21 of collection connection piece 2 is fixed on busbar 3 relatively with busbar 3, so that collection connection piece 2 is connected with busbar 3 electricity, the second connecting portion 22 of collection connection piece 2 is fixed on collection PCB1 relatively with collection PCB1, so that collection connection piece 2 is connected with collection PCB1 electricity, thereby carry out the electricity to collection PCB1 and busbar 3 through collection connection piece 2, make collection PCB1 can carry out the voltage acquisition to the electric core that concatenates on busbar 3.

Compared with the traditional mode of connecting the busbar 3 and the acquisition PCB1 by utilizing the wire harness, the acquisition connecting piece 2 disclosed by the application is small in occupied space, beneficial to improving the energy density of the battery pack, small in dead weight and beneficial to the lightweight design of the battery pack. Meanwhile, compared with the traditional mode that the bus bar 3 is electrically connected with the acquisition PCB1 through the leading-out lugs, the application adopts the independently arranged acquisition connecting piece 2, compared with the leading-out lugs, in the transportation and subsequent installation processes, the bus bar 3 and the acquisition PCB1 are not easy to bend and damage, so that the electric connection between the bus bar 3 and the acquisition PCB1 is firmer, and the acquisition connecting piece 2 can be clamped on the cell bracket 4 when the bus bar 3 and the acquisition PCB1 are connected, so that the acquisition connecting piece 2 is positioned through the cell bracket 4, the problem that the acquisition connecting piece 2 is not connected in place due to dislocation in the assembly process is avoided, and the stability of the cell voltage acquisition is ensured.

In one embodiment of the present application, preferably, as shown in fig. 1, a collecting bump piece 5 is disposed at a position where the collecting PCB1 is connected to the collecting connecting piece 2, the collecting bump piece 5 is a nickel piece, and the collecting nickel piece is fixed on the collecting PCB1 by soldering tin to be electrically connected to the collecting PCB1, specifically, to a voltage collecting circuit on the collecting PCB 1. When the collection connection piece 2 is clamped at the preset position of the battery cell support 4, the second connection part 22 of the collection connection piece 2 is opposite to the collection bump piece 5 on the collection PCB1, and the second connection part 22 of the collection connection piece 2 is electrically connected with the collection bump piece 5, so that the collection connection piece 2 is electrically connected with the collection PCB1 through the collection bump piece 5.

In one embodiment of the present application, preferably, the welding connection is performed between the two ends of the busbar 3 and the corresponding battery cell tabs, between the first connection portion 21 of the collecting connection piece 2 and the busbar 3, and between the second connection portion 22 of the collecting connection piece 2 and the collecting bump piece 5, so as to achieve the electrical connection while achieving the fixed connection.

In a specific assembly process, the collecting PCB1 provided with the collecting bump piece 5 can be fixed on the cell support 4, the busbar 3 and the collecting connecting piece 2 are respectively placed at corresponding positions, and then the welding of the plurality of positions is finished through laser welding, so that the assembly process is simplified to a certain extent, the production efficiency is improved, and the production cost is reduced.

In one embodiment of the present application, as shown in fig. 1 and 2, preferably, a clamping notch 23 is disposed between the first connection portion 21 and the second connection portion 22 of the collecting connection piece 2, a positioning rib 41 is disposed at a position where the cell support 4 is used for installing the collecting connection piece 2, when the collecting connection piece 2 connects the busbar 3 and the collecting PCB1, the collecting connection piece 2 can be clamped on the positioning rib 41 of the cell support 4 through the self clamping notch 23, even if the positioning rib 41 is inserted into the clamping notch 23 of the collecting connection piece 2, the collecting connection piece 2 is positioned, so that the first connection portion 21 can be exactly opposite to the busbar 3 and welded, and the second connection portion 22 can be opposite to the collecting bump piece 5 on the collecting PCB1 and welded, so as to avoid the situation that the collecting connection piece is not in place due to dislocation during welding.

In one embodiment of the present application, preferably, two ends of the busbar 3 are respectively used for electrically connecting with the tabs of the corresponding battery cells, that is, when two adjacent battery cells of the battery module are connected in series as described above, one end of the busbar 3 is welded with the positive tab of one battery cell, and the other end of the busbar 3 is welded with the negative tab of the other battery cell; the middle part of the bus bar 3 is formed with a arched buffer part 31, and the bus bar 3 is welded with the first connection part 21 of the acquisition connection piece 2 through the buffer part 31. Therefore, when the two ends of the busbar 3 are respectively welded with the corresponding battery cell lugs, the internal stress generated during connection can be effectively eliminated through the arched buffer parts 31; meanwhile, when the two ends of the collecting connecting piece 2 are respectively welded with the busbar 3 and the collecting bump piece 5, the problem of cold joint caused by uneven matching of the first connecting part 21 and the second connecting part 22 at the two ends of the collecting connecting piece 2 can be avoided through the arched buffer part 31.

In one embodiment of the present application, as shown in fig. 1, preferably, the cell support 4 is further formed with a limit groove at a position for installing the bus bar 3, the bus bar 3 can be adaptively disposed in the limit groove, and when the bus bar 3 is installed in the limit groove, one end of the bus bar can be opposite to the positive tab of one cell, and the other end of the bus bar can be opposite to the negative tab of the other cell, so that the bus bar 3 is limited by the limit groove, so as to facilitate subsequent welding connection.

In this embodiment, preferably, as shown in fig. 1, the limit groove is provided with an opening at a position opposite to the collecting tab 2, so that the second connection portion 22 at one end of the bus bar 3 can be welded to the collecting tab 5 on the collecting PCB1, and the first connection portion 21 at the other end of the bus bar 3 can extend into the limit groove to be welded with the bus bar 3.

Preferably, the side plate at the opening of the limit slot forms the positioning rib 41, that is, the collecting connecting piece 2 can be clamped at the opening of the limit slot.

In one embodiment of the present application, it is preferable that the thickness of the bus bar 3 is 1mm to 2mm, for example, the thickness of the bus bar 3 is 1.2mm, so that the buffer portion 31 of the middle arch of the bus bar 3 has good buffer property.

Preferably, the bus bar 3 is an aluminum bus bar 3 or a copper bus bar 3, so that the bus bar 3 has good conductivity.

Preferably, the collecting connecting piece 2 is a nickel piece, so that the collecting connecting piece 2 has good conductivity.

The application also provides a battery module and a battery pack comprising the battery module, wherein the battery module comprises the voltage acquisition assembly of any one of the embodiments, so that the battery module and the battery pack have all the beneficial effects of the voltage acquisition assembly, and the details are not repeated here.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A voltage acquisition assembly, comprising:

The acquisition PCB is fixedly arranged on one side of the battery cell bracket of the battery module;

The busbar and the acquisition PCB are positioned on the same side of the battery cell bracket, and two ends of the busbar are respectively and electrically connected with the lugs of the two battery cells of the battery module so as to connect the two battery cells in series;

The collection connection piece, the collection connection piece card is located on the electric core support, the one end of collection connection piece forms first connecting portion, first connecting portion with the busbar is relative and the electricity is connected, the other end of collection connection piece forms second connecting portion, second connecting portion with gather PCB is relative and the electricity is connected.

2. The voltage acquisition assembly of claim 1, wherein the acquisition PCB is electrically connected with an acquisition strike plate, the acquisition strike plate being opposite to and electrically connected with the acquisition connecting plate.

3. The voltage acquisition assembly of claim 2, wherein the acquisition strike is a nickel strike and is secured to the acquisition PCB by solder to electrically connect with the acquisition PCB.

4. The voltage acquisition assembly of claim 2, wherein laser welding is performed between the bus bar and the tabs of the two electric cores, between the second connection portion of the acquisition connection piece and the acquisition touch piece, and between the first connection portion of the acquisition connection piece and the bus bar.

5. The voltage acquisition assembly according to claim 1, wherein the acquisition connecting piece is provided with a clamping notch between the first connecting portion and the second connecting portion, the cell support is provided with a positioning rib, and the positioning rib is inserted into the clamping notch.

6. The voltage acquisition assembly according to claim 5, wherein the cell support is formed with a limit groove around the busbar, the limit groove is formed with an opening at the acquisition connecting piece, and a side plate of the limit groove at the opening forms the positioning rib.

7. The voltage acquisition assembly of claim 1 wherein the middle portion of the buss bar is formed with a domed buffer and the buss bar is electrically connected to the acquisition tab through the buffer.

8. The voltage acquisition assembly of claim 1, wherein the bus bar is 1mm-2mm thick, and the bus bar is an aluminum or copper bus bar;

The collecting connecting sheet is a nickel sheet.

9. A battery module comprising the voltage acquisition assembly of any one of claims 1 to 8.

10. A battery pack comprising the battery module of claim 9.