CN210926134U

CN210926134U - Bus bar sheet and battery module with same

Info

Publication number: CN210926134U
Application number: CN201920901080.6U
Authority: CN
Inventors: 张旭; 朱丽丽; 许玉林; 王爱淑
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Suzhou Ankao Energy Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-07-03
Anticipated expiration: 2029-06-14

Abstract

The application discloses a converge piece and battery module of configuration this converge piece are proposed, wherein the suppression has on the converge piece: a plurality of circular protrusion that is the matrix form and arranges encloses respectively and locates each a plurality of fold ring of circular protrusion outlying. The commonality of this kind of confluence piece of this application is good, can promote the assembly efficiency of battery module to reduce the cost of battery module.

Description

Bus bar sheet and battery module with same

Technical Field

The present invention relates to a bus bar and a battery module equipped with the same.

Background

In the assembly process of the battery module, the positive end face of a single battery cell (namely a single battery) is provided with an outward-protruding pole, the negative end face is a plane, and the distances from the two ends of the battery cell to the plane outside the battery clamp are inconsistent, so that a positive pole bus sheet and a negative pole bus sheet with different structures are required to be used.

However, the positive bus bar and the negative bus bar have different structural forms, two sets of processing equipment are required to be respectively configured on the positive bus bar and the negative bus bar, the manufacturing cost is high, two different bus bars are required to be configured during assembly of the module, and the assembly efficiency is very low.

Disclosure of Invention

The purpose of the application is: to the not enough of prior art, provide a piece and the battery module of configuration this piece that converges, the commonality of this piece that converges is good, can promote the assembly efficiency of battery module to reduce the cost of battery module

The technical scheme of the application is as follows:

a bus bar sheet having pressed thereon:

a plurality of circular protrusions arranged in a matrix, an

And the plurality of fold rings are respectively arranged around the periphery of each circular bulge.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

the axial section of the fold ring is in an N shape.

And the confluence sheet is provided with a plurality of opening holes positioned at the fold ring in a run-through manner.

The holes are uniformly distributed at intervals along the circumferential direction of the fold ring.

The break hole is a long hole extending along the radial direction of the corrugated ring,

the elongated holes have the same radial dimension as the corrugated rings.

The bus bar sheet is provided with a first surface and a second surface which are mutually deviated, and the circular bulges are uniformly distributed on the second surface of the bus bar sheet.

The outer end face, far away from the first surface, of the circular protrusion is a plane.

A battery module, comprising:

left and right battery clamps arranged at intervals, and

the cylindrical single batteries are positioned between the left battery clamp and the right battery clamp and are arranged in parallel in a matrix shape;

the left battery clamp and the right battery clamp are both provided with a plurality of battery inserting holes which are arranged in a matrix shape in a left-right through way, the hole wall of each battery inserting hole is integrally provided with a circle of annular inner convex edge which protrudes radially, the left end and the right end of the battery monomer are respectively inserted into the battery inserting holes of the left battery clamp and the right battery clamp, the left end face of the battery monomer is provided with a negative pole column which axially protrudes leftwards and is negatively charged, the right end face of the battery monomer is of a positively charged planar structure, the left end surface and the right end surface of the battery monomer are respectively abutted with the annular inner flanges in the left battery clamp and the right battery clamp, and the negative pole column extends into the central hole of the annular inner flange, and the left end face of the left battery clamp and the right end face of the right battery clamp are respectively attached and provided with a left confluence piece and a right confluence piece.

The left confluence piece and the right confluence piece are confluence pieces with the structure, wherein a circular bulge on the left confluence piece extends into a central hole of an annular inner flange on the left battery clamp to be connected with a negative pole column of a battery monomer in an abutting mode, the circular bulge on the right confluence piece penetrates through the central hole of the annular inner flange on the right battery clamp to be connected with a positive pole end face of the battery monomer in an abutting mode, and the circular bulge on the left confluence piece is extruded by the negative pole column to be axially collapsed and deformed.

The application has the advantages that: this application is a plurality of circular archs that are the matrix form and arrange and enclose and locate each circular protruding outlying a plurality of fold rings of converging on converging the piece of an organic whole suppression to guarantee that free positive terminal of battery and negative pole end homoenergetic and correspond in the battery module and converge the piece and lean on to be connected, need not to set up the piece that converges of isostructure specially to the difference of the structure of the positive negative pole end of battery monomer, it is good to converge the piece commonality, thereby promote the assembly efficiency of battery module, reduce the cost of battery module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present application;

fig. 2 is a partial sectional view of a battery module according to an embodiment of the present application;

FIG. 3 is a side view of a bus bar in an embodiment of the present application;

FIG. 4 is a cross-sectional view of a bus bar in an embodiment of the present application;

FIG. 5 is an enlarged view of a portion of FIG. 4;

wherein: 1-confluence piece, 2-left battery clamp, 3-right battery clamp, 4-single battery, 101-circular bulge, 102-fold ring, 103-opening hole, 2301-battery insertion hole and 2301 a-annular inner flange.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Fig. 1 to 4 show a specific embodiment of the battery module of the present application, and like the conventional battery module, the battery module also includes a left battery clamp 2 and a right battery clamp 3 which are separated from each other and are made of plastic material, the structures of the left battery clamp 2 and the right battery clamp 3 are completely the same, and a plurality of cylindrical battery cells 4 arranged in parallel in a matrix shape are arranged between the left battery clamp and the right battery clamp. All seted up a plurality of battery cartridge holes 2301 that link up about and on each battery anchor clamps to these battery cartridge holes 2301 are the matrix form and arrange on respective battery anchor clamps, and the pore wall department of every battery cartridge hole 2301 an organic whole is provided with the radial convex annular inner flange 2301a of round. The left end of the battery cell 4 is inserted into the battery insertion hole 2301 of the left battery clamp 2, and the right end of the battery cell is inserted into the battery insertion hole 2301 of the right battery clamp 3. The left end face of the single battery 4 is provided with a negative pole 401 protruding axially leftwards and having negative electricity, and the right end face of the single battery 4 is of a plane structure having positive electricity. The left end face of the battery cell 4 abuts (is connected against) the annular inner flange 2301a in the left battery holder 2, and the negative pole column 401 of the battery cell 4 protrudes into the center hole of the annular inner flange 2301 a. The right end surface of the battery cell 4 abuts against the annular inner flange 2301a in the right battery holder 3. The left end face of the left battery clamp 2 and the right end face of the right battery clamp 3 are both attached with the bus bar 1, and for convenience of describing the structure of the present embodiment, the bus bar 1 attached with the left battery clamp 2 is called a left bus bar (also called a negative bus bar), and the bus bar 1 attached with the right battery clamp 3 is called a right bus bar (also called a positive bus bar).

It can be seen from the above that, since the left end surface of the battery cell 4 has the protruded negative pole column 401, and the negative pole extends into the central hole of the annular inner flange 2301a, and the right end surface of the battery cell 4 is a plane completely located at the side of the annular inner flange 2301a, the distance between the left end surface of the left battery clamp 2 and the battery cell negative pole column 401 is smaller than the distance between the right end surface of the right battery clamp and the right end surface of the battery cell plane. How to let the left busbar piece and the right busbar piece have the same structure in order to improve the assembly efficiency of the module, not only can the left busbar piece be ensured to abut against the contact with the negative pole column 401 at the left end of the single battery so as to weld the two and lead out the negative pole of the battery, but also can the right busbar piece be ensured to abut against the contact with the planar right end surface of the single battery so as to weld the two and lead out the positive pole of the battery?

In contrast, in the present embodiment, each manifold sheet 1 is optimally designed as follows: the plurality of circular bulges 101 and the plurality of corrugated rings 102 are uniformly pressed on each manifold sheet 1, wherein the circular bulges 101 are arranged in a matrix shape, the corrugated rings 102 are circular, and each corrugated ring 102 is respectively arranged around the periphery of each circular bulge 101, so that the corrugated rings 102 are also arranged in a matrix shape.

So set up the structure of convergent current piece 1, aim at lets the convergent current piece homoenergetic of the left and right sides to lean on the contact with the battery tip to draw forth the electric energy of module.

The protruding height of the circular protrusion 101 is slightly larger than (at least equal to) the distance between the right end surface of the right battery clamp and the right end surface of the battery cell plane. After the assembly is completed, the circular protrusion 101 on the left bus bar extends into the central hole of the annular inner flange 2301a on the left battery clamp to be directly or indirectly abutted against and connected with the negative pole column 401 of the battery monomer 4 (in some battery molds, a thin series metal sheet is clamped between the bus bar and the end part of the battery monomer, in this case, the circular protrusion 101 on the left bus bar is indirectly abutted against and connected with the negative pole column of the battery monomer 4), and the circular protrusion 101 on the right bus bar penetrates through the central hole of the annular inner flange 2301a on the right battery clamp to be directly or indirectly abutted against and connected with the positive pole end face of the battery monomer 4. Because the distance between the left end face of the left battery clamp 2 and the battery cell negative pole 401 is small, and the protruding height of the circular protrusion 101 is greater than the distance value, the circular protrusion 101 on the left bus bar is extruded by the negative pole 401 to be axially collapsed and deformed. The circular protrusion 101 on the right bus bar is also pressed by the right end face of the battery cell to undergo a relatively small axial collapse deformation (the deformation is a recoverable elastic deformation because the bus bar is made of metal).

In order to improve the connection strength between the bus bar 1 and the battery cell 4, if necessary, the circular protrusion 101 on the bus bar may be welded and fixed to the negative pole or the positive pole end face of the battery cell.

The corrugated ring 102 on the periphery of the circular protrusion 101 is configured to make the circular protrusion 101 more likely to collapse and deform when subjected to an axial pressing force. Specifically, when the circular protrusion 101 is pressed, the pressing force is transmitted to the crimp ring 102 to deform the crimp ring 102, thereby collapsing the circular protrusion 101.

In this embodiment, the axial cross section of the corrugated ring 102 is N-shaped.

In order to make the wrinkle ring 102 deform more easily when being stressed and further make the circular protrusion 101 collapse more easily when being stressed, the current collecting plate 1 of the present embodiment is provided with a plurality of holes 103 penetrating and located at the wrinkle ring 102. The openings 103 are uniformly spaced along the circumferential direction of the corrugated ring 102.

These cutouts 103 are elongated holes extending in the radial direction of the pleat rings 102 and having substantially equal radial dimensions as the pleat rings 102.

Obviously, the bus bar 1 has a first surface and a second surface facing away from each other, and each circular protrusion 101 is uniformly disposed on the second surface of the bus bar 1, that is, each circular protrusion 101 is uniformly disposed on the same side of the bus bar 1. Moreover, the outer end face of the circular protrusion 101, which is far away from the first surface, is a plane, so as to ensure that the contact area of the circular protrusion 101 and the cathode pillar or the anode end face is large enough.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims

1. A bus bar sheet, wherein the bus bar sheet (1) is pressed with:

a plurality of circular protrusions (101) arranged in a matrix, and

a plurality of corrugated rings (102) respectively arranged around the periphery of each circular bulge.

2. Bus bar according to claim 1, characterized in that the axial cross section of the crimp ring (102) is N-shaped.

3. The bus bar according to claim 2, wherein a plurality of holes (103) are formed through the bus bar (1) at the position of the corrugated ring (102).

4. The bus bar according to claim 3, wherein the openings (103) are evenly spaced along the circumference of the corrugated ring (102).

5. The bus bar according to claim 4, characterized in that the break-through hole (103) is an elongated hole extending in a radial direction of the pleat ring (102).

6. The bus bar as set forth in claim 5 wherein said slot holes have the same radial dimension as the pleat rings (102).

7. Bus bar according to claim 1, characterized in that the bus bar (1) has a first surface and a second surface facing away from each other, and that the circular protrusions (101) are each arranged on the second surface of the bus bar (1).

8. The bus bar as claimed in claim 7 wherein an outer end surface of the circular protrusion (101) distal from the first surface is planar.

9. A battery module, comprising:

a left battery clamp (2) and a right battery clamp (3) which are arranged at intervals, an

The cylindrical battery single cells (4) are positioned between the left battery clamp and the right battery clamp and are arranged in parallel in a matrix shape;

the left battery clamp (2) and the right battery clamp (3) are provided with a plurality of battery inserting holes (2301) which are arranged in a matrix shape in a left-right through mode, a circle of annular inner flanges (2301a) which protrude in the radial direction are integrally arranged at the hole walls of the battery inserting holes, the left end and the right end of the battery monomer (4) are respectively inserted into the battery inserting holes of the left battery clamp and the right battery clamp, the left end face of the battery monomer (4) is provided with a negative pole column (401) which protrudes towards the left in the axial direction and is negatively charged, the right end face of the battery monomer (4) is of a positively charged planar structure, the left end face and the right end face of the battery monomer (4) are respectively abutted against the annular inner flanges (2301a) in the left battery clamp and the right battery clamp, and the negative pole column (401) extends into the center hole of the annular inner flanges (2301a), the left end face of the left battery clamp (2) and the right end face of the right battery clamp (3) are respectively attached and arranged with a left manifold piece and a right manifold piece;

the left bus bar piece and the right bus bar piece are both the bus bar piece (1) as claimed in any one of claims 1 to 8, wherein a circular protrusion (101) on the left bus bar piece extends into a central hole of an annular inner flange (2301a) on a left battery clamp to be connected with a negative pole column (401) of a battery monomer (4) in an abutting mode, the circular protrusion (101) on the right bus bar piece penetrates through the central hole of the annular inner flange (2301a) on the right battery clamp to be connected with a positive pole end face of the battery monomer (4) in an abutting mode, and the circular protrusion (101) on the left bus bar piece is extruded by the negative pole column (401) to be axially collapsed and deformed.