CN210692661U - Battery confluence piece and battery pack with fusing protection mechanism - Google Patents

Abstract

The application discloses battery conflux piece and group battery with fusing protection mechanism, wherein the battery conflux piece includes the piece body that converges of sheetmetal structure, it has a plurality of orientation to stamp on the piece body that converges the piece body with the convex arch in side surface, link up in the arch and set up four fan-shaped holes that are the rectangular distribution, these four the fan-shaped hole will protruding division become by the battery weld part that is located the center and a body coupling in the cross structure that four peripheral electrically conductive arms of battery weld part constitute, every all link up on the electrically conductive arm and set up a plurality of holes. When a certain battery monomer in this application battery pack takes place short circuit or thermal runaway, can in time cut off the free electric connection of trouble battery and heat-conduction, effectively avoid further thermal expansion.

Description

Battery confluence piece and battery pack with fusing protection mechanism

Technical Field

The application relates to a battery bus bar and a battery pack with a fuse protection mechanism.

Background

In recent years, power batteries and energy storage batteries are applied and developed rapidly. The power battery is a key part of equipment such as an electric automobile. The power battery is generally composed of a battery module consisting of a plurality of battery cells (i.e. single batteries). The lithium ion battery cell has the characteristics of stable mature process, low cost, flexible design and the like, and plays an important role in battery application. The lithium ion battery cell has very high utilization rate in various standardized modules, and is fully applied to power batteries and energy storage batteries. In order to obtain higher operating current, tens or even hundreds of lithium ion cells are connected through bus bars to form a combination.

In the prior art, the number of the parallel-connected battery cells in each battery module is often large, and if a single battery cell is short-circuited or thermally out of control, the circuit of the whole module can influence the whole parallel-connected battery cells due to electric connection or heat conduction.

Disclosure of Invention

The purpose of the application is: in order to solve the problems, the battery confluence piece with the fusing protection mechanism and the battery pack with the confluence piece are provided, when a certain battery monomer is in short circuit or thermal runaway, the electric connection and the heat conduction of a fault battery conductor can be cut off in time, and further thermal expansion is effectively avoided.

The technical scheme of the application is as follows:

the utility model provides a battery manifold piece with fusing protection mechanism, includes the piece body that converges of sheetmetal structure, it has a plurality of orientation to press on the piece body that converges the convex arch of piece body with one side surface of piece body that converges, link up in the arch and set up four fan-shaped holes that are the rectangular distribution, these four the fan-shaped hole will the arch is cut apart into by the battery weld part that is located the center and an organic whole connect in the crisscross structure that four peripheral electrically conductive arms of battery weld part constitute, every all link up on the electrically conductive arm and set up a plurality of holes.

The fan-shaped hole is arranged at the outer edge of the bulge.

At least three holes are formed in each conductive arm.

The holes are uniformly arranged at intervals along the width direction of the conductive arm.

The bulges are arranged on the confluence sheet body in a matrix shape.

And the confluence sheet body is also provided with lightening holes which are arranged between the bulges in a penetrating way.

And a cutting groove positioned between the holes is formed on the surface of the conductive arm.

The cross section of the cutting groove is triangular.

A battery pack, comprising:

two battery supports which are arranged at intervals at the left and the right and are made of insulating materials,

a plurality of battery cells arranged between the two battery supports and having a positive terminal and a negative terminal at the left and right ends, respectively, and

the battery confluence pieces of the two structures are respectively attached to the sides, which are far away from the two battery supports, of the two battery supports;

a plurality of battery jacks are formed in the battery bracket in a left-right through manner, and the left end and the right end of each battery monomer are respectively inserted into the battery jacks of the two battery brackets;

the bulge extends into the battery jack, and the battery welding part on the bulge is welded and fixed with the battery monomer.

And the battery welding part on the protrusion is fixed with the battery monomer through laser welding.

The application has the advantages that:

1. this application stamping process goes out the arch in a plurality of battery jacks that can stretch into battery holder on battery converges piece to make the arch lean on contact and welded fastening with free positive terminal of battery or negative pole end.

2. This application is protruding four fan-shaped holes of seting up of confluence piece, not only has and subtracts the heavy effect, moreover after the group battery assembly is accomplished, can insert the welding strength of fan-shaped hole in order to detect battery monomer and confluence piece with the instrument.

3. The through holes on the conductive arms reduce the overcurrent area of the conductive arms at the hole positions, and when a single battery has a short circuit or a thermal runaway fault, the conductive arms at the holes can be fused due to larger heat productivity to cut off short-circuit current, so that the thermal runaway accident of the whole battery pack is prevented.

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 perspective view illustrating a battery pack according to an embodiment of the present disclosure;

fig. 2 is a front view of a battery bus bar according to an embodiment of the present disclosure;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic perspective view illustrating a battery bus bar according to an embodiment of the present disclosure;

fig. 5 is a schematic perspective view of a battery bus bar in the second embodiment of the present application;

fig. 6 is a front view of a battery bus bar according to a second embodiment of the present application;

FIG. 7 is a sectional view taken along line B-B of FIG. 6;

FIG. 8 is an enlarged view of the portion X of FIG. 7;

wherein: 100-battery bus bars, 200-battery supports, 300-battery cells, 101-bus bar bodies, 102-bulges, 102 a-fan-shaped holes, 102 b-battery welding parts, 102 c-conductive arms, 102 d-holes, 102 e-cutting grooves, 103-lightening holes and 201-battery jacks.

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).

The first embodiment is as follows:

fig. 1 to 4 show an embodiment of the battery pack of the present application, which is similar to some conventional battery packs, and the battery pack also includes two battery supports 200 (also referred to as battery clamps in the art) made of insulating material, the outer contours of the two battery supports 200 are substantially rectangular plate structures, the two battery supports 200 are arranged in a left-right interval, a plurality of cylindrical battery cells 300 are arranged between the two battery supports 200, the outer side surfaces of the two battery supports 200 facing away from each other are respectively abutted to a battery bus bar 100, and the battery bus bar 100 includes a bus bar body 101 of a metal plate structure. Specifically, the method comprises the following steps: the battery support 200 is provided with a plurality of battery jacks 201 which are communicated left and right, the left end and the right end of the battery monomer 300 are respectively inserted into the battery jacks of the two battery supports, the left end and the right end of the battery monomer 300 are respectively a positive end and a negative end, the left end (the positive end) of the battery monomer 300 is in conductive connection with the battery bus sheet 100 on the left side, the right end (the negative end) of the battery monomer 300 is in conductive connection with the battery bus sheet 100 on the right side, and therefore the battery monomers 300 are connected in parallel by means of the two battery bus sheets 100.

The key improvement of this embodiment is that a plurality of protrusions 102 protruding toward the same side surface of the bus bar body are stamped on the bus bar body 101 of each battery bus bar 100, four rectangular fan-shaped holes 102a are formed through the protrusions 102, the four fan-shaped holes 102a divide the protrusions 102 into a cross-shaped structure formed by a battery welding portion 102b located at the center and four conductive arms 102c integrally connected to the periphery of the battery welding portion, and a plurality of holes 102d are formed through each conductive arm 102 c. The protrusion 102 extends into the battery receptacle 201, and the battery welding portion 102b on the protrusion 102 is fixed to (the positive terminal or the negative terminal of) the battery cell 300 by laser welding, so as to achieve the above-mentioned conductive connection between the battery bus bar 100 and the battery cell 300.

During operation, current flows from the positive terminal of the battery cell to the battery welding portion 102b, then flows from the battery welding portion 102b to the conductive arm 102c, and flows from the conductive arm 102c to the bus bar body 101.

Further, the fan-shaped holes 102a are provided at the outer edge of the projection 102. And three holes 102d are provided on each of the conductive arms 102c, and the three holes 102d are arranged at regular intervals along the width direction of the conductive arm 102 c.

The protrusions 102 are arranged in a matrix on the bus bar body 101.

In order to reduce the weight of the battery pack and increase the energy density of the battery pack, a plurality of lightening holes 103 located between the protrusions 102 are further perforated on the bus bar body 101 in the present embodiment.

Example two:

fig. 5 to 8 show a specific embodiment of the battery bus bar of the present application, and the battery bus bar 100 of the present embodiment has substantially the same structure as the battery bus bar of the first embodiment, and the difference between the two embodiments is that:

each conductive arm 102c is formed with only two holes 102d, and the surface of the conductive arm 102c is formed with a slot 102e between the holes 102 d. The purpose of the notch 102e is to further reduce the flow area of the hole 102d, so that the fuse can be more sensitive.

The cross section of the cut groove 102e is triangular, and the groove depth is 0.7 mm.

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 (10)

1. The battery collector plate (100) with the fusing protection mechanism comprises a collector plate body (101) of a metal plate structure, and is characterized in that a plurality of protrusions (102) protruding towards the same side surface of the collector plate body are stamped on the collector plate body (101), four fan-shaped holes (102a) distributed in a rectangular shape are formed in the protrusions (102) in a penetrating mode, the four fan-shaped holes (102a) divide the protrusions (102) into a cross-shaped structure formed by a battery welding portion (102b) located in the center and four conductive arms (102c) integrally connected to the periphery of the battery welding portion, and a plurality of holes (102d) are formed in each conductive arm (102c) in a penetrating mode.

2. The battery bus bar with fuse protection mechanism as claimed in claim 1, wherein the scallops (102a) are provided at the outer edge of the protrusion (102).

3. The battery bus bar with fuse protection mechanism as claimed in claim 1, wherein each of the conductive arms (102c) is provided with at least three holes (102 d).

4. The battery bus bar with fuse protection mechanism as claimed in claim 1, wherein the holes (102d) are uniformly spaced along the width direction of the conductive arm (102 c).

5. The battery bus bar with fuse protection mechanism as claimed in claim 1, wherein each of the protrusions (102) is arranged in a matrix on the bus bar body (101).

6. The battery bus bar with the fusing protection mechanism as claimed in claim 1, wherein the bus bar body (101) is further perforated with lightening holes (103) located between the protrusions (102).

7. The battery lug with fuse protection mechanism of claim 1, wherein the surface of the conductive arm (102c) defines a slot (102e) between the holes (102 d).

8. The battery bus bar with fuse protection mechanism as claimed in claim 7, wherein the cross-section of the cut groove (102e) is triangular.

9. A battery pack, comprising:

two battery supports (200) which are arranged at intervals at the left and the right and are made of insulating materials,

a plurality of battery cells (300) arranged between the two battery supports and having a positive terminal and a negative terminal at the left and right ends, respectively, and

two battery confluence pieces (100) respectively arranged at the sides of the two battery supports in an abutting mode;

a plurality of battery jacks (201) are formed in the battery bracket (200) in a left-right through mode, and the left end and the right end of each battery monomer (300) are respectively inserted into the battery jacks of the two battery brackets;

the battery manifold piece (100) is the battery manifold piece as claimed in any one of claims 1 to 8, the protrusion (102) extends into the battery insertion hole (201), and the battery welding part (102b) on the protrusion (102) is welded and fixed with the battery unit (300).

10. The battery pack according to claim 9, wherein the battery welding part (102b) on the protrusion (102) is fixed to the battery cell (300) by laser welding.

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