CN209896158U

CN209896158U - Lithium battery confluence connecting sheet

Info

Publication number: CN209896158U
Application number: CN201920791182.7U
Authority: CN
Inventors: 黄进德; 欧阳长春; 任海斌
Original assignee: Jiangsu Core Amperex Technology Ltd
Current assignee: Zhongan Xinjie Laixi New Energy Technology Co ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-01-03
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses a lithium cell connection piece that converges, including first module, connection piece and the second module that converges, be provided with first contact shell fragment and second contact shell fragment on the connection piece that converges, and first contact shell fragment is located second contact shell fragment one side, connection piece one end that converges is provided with utmost point ear, first module and second module outer wall both sides all are provided with the piece that converges, all be provided with solid screw rod hole on first module, second module and the connection piece that converges. The utility model discloses a setting of a series of structures can the adjacent module of stable connection, reduces the confluent connection cost between the module, improves assembly efficiency.

Description

Lithium battery confluence connecting sheet

Technical Field

The utility model relates to the technical field of batteries, specifically a lithium cell connection piece that converges.

Background

Lithium batteries are more and more widely applied in daily life, the lithium batteries are arranged in different ways according to different use requirements, and the shapes of bus bars required by the lithium batteries are naturally different. The bus bar occupies an extremely important position in the battery PACK because it determines the quality of the overcurrent conduction capability in the battery module. It can also be said that the quality of the bus current directly affects the performance of the entire battery system.

The lithium battery module comprises one or more modules, wherein a positive electrode and a negative electrode in one module are connected with the bus sheet in a welding mode, and the bus sheet is fixed together by the aid of pressure generated after the modules are compressed by the aid of screw sets. The former key lies in avoiding leaking welding, rosin joint, spot explosion etc. spot welding badly, and the latter key lies in the torsion and the quantity of screw that the screw compresses tightly, and quantity can influence the confluence effect of module inadequately, causes bad consequences such as generate heat, and quantity is too much then can increase various manufacturing cost, causes unnecessary extravagant.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell connection piece that converges to solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a lithium cell connection piece that converges, includes first module, connection piece and the second module that converges, it is provided with first contact shell fragment and second contact shell fragment on the connection piece to converge, and first contact shell fragment is located second contact shell fragment one side, connection piece one end that converges is provided with utmost point ear, first module and second module outer wall both sides all are provided with the piece that converges, all be provided with solid screw rod hole on first module, second module and the connection piece that converges.

Preferably, the bus connecting piece is made of nickel-plated steel material, and the contact elastic piece has enough contact area with the bus pieces on the first module and the second module under the action of certain pressure.

Preferably, the first contact spring pieces and the second contact spring pieces are distributed on the whole confluence connecting piece in a staggered mode, and the front side and the back side of each of the first contact spring pieces and the second connecting piece are in a symmetrical state.

Preferably, the bus bar connection tab is located between the first module and the bus bar on the second module in the vicinity.

Preferably, the bus bar is fixedly connected with the positive electrode and the negative electrode of each cell through four welding points formed by spot welding.

Compared with the prior art, the beneficial effects of the utility model are that: the bus connecting pieces with corresponding sizes are selected according to the arrangement mode of the battery cells in the first module and the second module of the battery, the supports are fixed at two ends of the battery cells, the bus connecting pieces are positioned at two sides of the positions of the positive and negative electrode supports, the cross-shaped groove position of the bus piece and the positive electrode and the negative electrode of the battery cell are positioned on the same straight line, the bus piece and the positive electrode or the negative electrode of the battery cell are welded together, the bus connecting pieces are positioned between the first module and the second module, the contact elastic pieces can be reliably contacted under the mutual pressure of nuts at two ends of the whole module and the module, the current is conducted, the contact area can be increased to a certain extent under the condition of mutual acting force, the contact internal resistance can be correspondingly reduced, the bus between the modules in the module is improved, and the quality of. The utility model discloses a setting of a series of structures can the adjacent module of stable connection, reduces the confluent connection cost between the module, improves assembly efficiency.

Drawings

Fig. 1 is an exploded view of the overall structure of the bus bar connector of the present invention between modules.

Fig. 2 is an overall schematic view of the bus bar connecting piece of the present invention.

Fig. 3 is a side view of the bus bar connector of the present invention.

Fig. 4 is a front view of the bus bar connecting piece of the present invention.

Fig. 5 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.

Fig. 6 is an enlarged schematic view of a portion a of fig. 2 according to the present invention.

In the figure: 1. a first module; 2. a confluence connecting sheet; 3. a second module; 4. a solid screw hole; 5. a confluence sheet; 6. a first contact spring; 7. a second contact dome; 8. and (7) a tab.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 6, in an embodiment of the present invention, a lithium battery busbar connection piece includes a first module 1, a busbar connection piece 2 and a second module 3, the busbar connection piece 2 is provided with a first contact spring 6 and a second contact spring 7, the first contact spring 6 is located on one side of the second contact spring 7, one end of the busbar connection piece 2 is provided with a tab 8, both sides of the outer walls of the first module 1 and the second module 3 are provided with a busbar 5, the first module 1, the second module 3 and the busbar connection piece 2 are provided with a solid screw hole 4, the busbar connection piece 2 is made of nickel-plated steel material, the contact springs have enough contact area with the busbar 5 on the first module 1 and the second module 3 under a certain pressure, the first contact springs 6 and the second contact springs 7 are distributed on the whole busbar connection piece 2 in a staggered manner, the first contact springs 6 and the second connection piece are symmetrical with respect to each other, the confluence connecting piece 2 is positioned between the first module 1 and the confluence piece 5 on the second module 3, the confluence pieces 5 are fixedly connected with the positive pole and the negative pole of each battery cell through four welding points formed by spot welding, the pole ear 8 is used for connecting a voltage collecting line, and if the plane where the pole ear 8 is positioned is lower than the outer plane of the support or interferes with the support to a certain degree, the pole ear can be led out to a proper position by adopting a bending method.

The utility model discloses a theory of operation is: the collecting connection piece 2 with corresponding size is selected according to the arrangement mode of the battery cell in the first module and the second module of the battery, the support is fixed at two ends of the battery cell, the collecting connection piece 2 is positioned at two sides of the position of the positive and negative electrode supports, the position of the cross-shaped groove of the collecting piece 5 is positioned on the same straight line with the positive electrode and the negative electrode of the battery cell, the collecting connection piece is welded with the positive electrode or the negative electrode of the battery cell, the collecting connection piece 2 is positioned between the first module 1 and the second module 3, the contact elastic piece can reliably contact under the mutual pressure of the nuts at two ends of the whole module and the module, the current is conducted, the contact area can be increased to a certain extent under the condition of mutual acting force, the contact internal resistance can be correspondingly reduced, the collecting current among the modules in the module is improved, and the.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a lithium cell connection piece that converges, includes first module (1), connection piece (2) and second module (3) converge, its characterized in that, it is provided with first contact shell fragment (6) and second contact shell fragment (7) on connection piece (2) to converge, and first contact shell fragment (6) are located second contact shell fragment (7) one side, connection piece (2) one end that converges is provided with utmost point ear (8), first module (1) and second module (3) outer wall both sides all are provided with converge piece (5), all be provided with solid screw rod hole (4) on first module (1), second module (3) and connection piece (2) converge.

2. The lithium battery busbar connection piece according to claim 1, wherein the busbar connection piece (2) is made of nickel-plated steel material, and the contact spring piece has a sufficient contact area with the busbar pieces (5) on the first module (1) and the second module (3) under a certain pressure.

3. The lithium battery busbar connection piece according to claim 1, wherein the first contact spring pieces (6) and the second contact spring pieces (7) are distributed on the whole busbar connection piece (2) in a staggered manner, and the front and back surfaces of the first contact spring pieces (6) and the second connection piece are in a symmetrical state.

4. A lithium battery busbar connection piece according to claim 1, wherein the busbar connection piece (2) is located between the first module (1) and the busbar (5) on the second module (3) adjacent to each other.

5. The lithium battery busbar connection piece according to claim 1, wherein the busbar piece (5) is fixedly connected with the positive electrode and the negative electrode of each cell by spot welding four welding points.