CN217387462U

CN217387462U - Connection piece for lithium iron phosphate battery

Info

Publication number: CN217387462U
Application number: CN202220831883.0U
Authority: CN
Inventors: 陆海军
Original assignee: Shenzhen Ampere Times Digital Energy Technology Co ltd
Current assignee: Shenzhen Ampere Times Digital Energy Technology Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-09-06
Anticipated expiration: 2032-04-11

Abstract

The utility model provides a connecting piece for lithium iron phosphate batteries, which comprises a plate body, wherein the middle part of the plate body is provided with a bending part, the bending part is provided with at least one strip-shaped hole, and the strip-shaped hole extends along the length direction of the plate body; welding areas are arranged at two ends of the plate body, and a plurality of through holes which are uniformly distributed are formed in the welding areas; the structure is novel, the connection between the connecting sheet and the battery pole can be enhanced, and the loosening is effectively prevented; and also provides a deformation space for coping with the expansion of the battery, thereby preventing the damage of the battery and improving the use safety.

Description

Connecting sheet for lithium iron phosphate battery

Technical Field

The utility model relates to a battery accessories field, more specifically relates to a connection piece for lithium iron phosphate battery.

Background

Lithium iron phosphate batteries are one type of lithium batteries, and lithium ion power battery packs are generally formed by connecting and combining single batteries in series or parallel or series-parallel connection. Therefore, various performance requirements on the connection part between the single batteries are higher and higher; and the lithium ion battery inevitably has certain degree of inflation in the use, makes the distance increase between the battery pack monomer battery.

At present, strip metal plates or flexible connections are mainly used in connection between power battery cells; generally, in order to ensure the reliability and firmness of the battery pack, the combination between the single batteries is very tight; after the battery expands, the strip-shaped metal plate has no elasticity, so that great pulling force is generated on the pole column, the pole column is easily damaged, the battery sealing component is also easily damaged, and the probability of safety risk is increased; if the flexible connection is used, the problem that the tensile force on the battery pole is increased due to the increase of the space between the battery poles can be solved, but the flexible connection is to press the metal plates at the two ends and the middle multi-layer metal net together by using mechanical force, so that the contact resistance of the connecting sheet is increased, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a connecting sheet for a lithium iron phosphate battery, which has a novel structure, can strengthen the connection between the connecting sheet and a battery pole column and effectively prevent the connecting sheet from loosening; and also provides a deformation space for coping with the expansion of the battery, thereby preventing the damage of the battery and improving the use safety.

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

the utility model provides a connecting piece for lithium iron phosphate battery, which comprises a plate body, wherein the middle part of the plate body is provided with a bending part, the bending part is provided with at least one strip-shaped hole, and the strip-shaped hole extends along the length direction of the plate body; welding areas are arranged at two ends of the plate body, and a plurality of through holes which are uniformly distributed are formed in the welding areas.

The utility model discloses among the technical scheme of preferred, the kink is wavy structure, and wherein the crest tip of one side and the face parallel and level of plate body, and the opposite side crest is unified protruding.

The utility model discloses among the technical scheme of preferred, the concave first heavy groove that is equipped with in plate body position that corresponds the weld zone, first heavy groove is located the bellied one side of kink crest, and first heavy groove department is all located to the through-hole.

The utility model discloses among the technical scheme of preferred, the length in bar hole is greater than the length of kink, makes the both ends in bar hole extend to the outside of kink.

The utility model discloses in the technical scheme of preferred, the four corners position of plate body all is equipped with the fillet, and each edge department all is equipped with the chamfer.

The utility model discloses among the technical scheme of preferred, the wall that the welding area kept away from first heavy groove is gone up the concave second heavy groove that is equipped with, and the through-hole all falls into the second heavy inslot.

The invention has the beneficial effects that:

the connecting sheet for the lithium iron phosphate battery is novel in structure, the connecting sheet can be conveniently welded with a pole of a battery cell by virtue of the design of a welding area and a through hole, the through hole can be conveniently penetrated by laser to directly heat the pole, the contact point and the contact area of laser welding can be increased by virtue of the through hole, the connection between the connecting sheet and the pole can be enhanced, and the connecting sheet and the pole can be prevented from loosening; the bending part is arranged on the plate body, so that a deformation space for coping with the expansion of the battery can be provided, the battery is prevented from being damaged, and the use safety can be improved; and the strip-shaped holes are formed in the bent parts, so that the structural strength of the bent parts can be weakened to a certain extent, and the subsequent stretching deformation can be conveniently carried out under the condition of not influencing the normal connection, so that the expansion of the battery can be conveniently dealt with.

Drawings

Fig. 1 is a front view of a connection sheet for a lithium iron phosphate battery provided in an embodiment of the present invention;

fig. 2 is a rear view of a connection sheet for a lithium iron phosphate battery provided in an embodiment of the present invention;

fig. 3 is a top view of a connection sheet for a lithium iron phosphate battery provided in an embodiment of the present invention;

fig. 4 is a schematic view of a usage state of a connection sheet for a lithium iron phosphate battery provided in an embodiment of the present invention.

In the figure:

100. a plate body; 110. a bent portion; 120. a strip-shaped hole; 130. a welding area; 140. a through hole; 150. a first sink tank; 160. a second sink tank.

Detailed Description

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

As shown in fig. 1 to 3, the embodiment of the present invention discloses a connecting sheet for lithium iron phosphate battery, including a sheet body 100, wherein a bending portion 110 is disposed at the middle portion of the sheet body 100, at least one strip-shaped hole 120 is disposed at the bending portion 110, and the strip-shaped hole 120 extends along the length direction of the sheet body 100; the board body 100 has two ends each having a bonding pad 130, and the bonding pad 130 has a plurality of through holes 140 uniformly distributed therein.

The connecting sheet for the lithium iron phosphate battery is novel in structure, the connecting sheet can be conveniently welded with a pole of a battery cell through the design of a welding area and a through hole, the through hole can be conveniently penetrated by laser to directly heat the pole, the contact point and the contact area of laser welding can be effectively increased through the through hole, the connection between the connecting sheet and the pole can be enhanced, and the connecting sheet and the pole can be prevented from loosening; the plate body is provided with a bending part, so that a deformation space for coping with the expansion of the battery can be provided, the battery is prevented from being damaged, and the use safety can be improved; and the strip-shaped holes are formed in the bent parts, so that the structural strength of the bent parts can be weakened to a certain extent, and the subsequent stretching deformation can be conveniently carried out under the condition of not influencing the normal connection, so that the expansion of the battery can be conveniently dealt with.

Further, kink 110 is wavy structure, can provide more deformation position relatively to tensile deformation carries out at a certain position, fully deals with the expansion deformation of battery, and the crest tip of one side and the face parallel and level of plate body 100 wherein, the unified arch of opposite side crest, this structural design then can make things convenient for the processing of kink to buckle, also can support to hold the meeting through bellying and electric core department realization, prevents the built on stilts of connection piece, and still can prevent outwards protruding and occupy battery case's space.

Furthermore, a first sinking groove 150 is concavely arranged at a position of the board body 100 corresponding to the soldering region 130, the first sinking groove 150 is located at one side of the protruding wave peak of the bending portion 110, and the through holes 140 are all arranged at the first sinking groove 150; first heavy groove can conveniently cooperate the screens with the utmost point post of electric core, conveniently counterpoints and connects.

Further, the length of the strip-shaped hole 120 is greater than that of the bending part 110, so that two ends of the strip-shaped hole 120 extend to the outer side of the bending part 110; the bending part can be effectively penetrated, and the deformation resistance of the bending part area is weakened, so that subsequent deformation is facilitated.

Furthermore, the four corners of the plate body 100 are provided with round corners, and the edges are provided with chamfers, so that the edges and corners of the connecting sheet can be prevented from being too sharp, and the human body can be prevented from being scratched in the assembling and processing process.

Furthermore, the wall surface of the welding area 130, which is far away from the first sinking groove 150, is concavely provided with a second sinking groove 160, the through holes 140 all fall into the second sinking groove 160, in the laser welding process, laser is applied to the welding area, the welding part is melted through high temperature and is rapidly cooled and solidified to form connection, and the design of the second sinking groove can enable the position to be in a thin-wall structure, facilitate rapid transmission of temperature, and even facilitate the entering of a melt into the second sinking groove and further enhance the connection.

As shown in fig. 4, in an actual use process, the lithium iron phosphate battery includes a plurality of battery cells arranged in parallel, two adjacent battery cells are connected in series through a connecting sheet, and the connecting sheet needs to be welded and fixed on a corresponding pole to achieve electrical conduction of the whole battery; the first sinking groove is arranged and can be used for connecting the sheet to be matched with the pole of the battery cell, so that the alignment is convenient; the arrangement of a plurality of through holes and the second sink groove can effectively strengthen the welding connection strength and prevent loosening.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. The utility model provides a connection piece for lithium iron phosphate battery which characterized in that:

the plate comprises a plate body, wherein a bent part is arranged in the middle of the plate body, at least one strip-shaped hole is arranged at the bent part, and the strip-shaped hole extends along the length direction of the plate body;

welding areas are arranged at two ends of the plate body, and a plurality of through holes which are uniformly distributed are formed in the welding areas.

2. The connecting sheet for a lithium iron phosphate battery according to claim 1, characterized in that:

the kink is wavy structure, and the face parallel and level of the face of crest tip and plate body of one side wherein, and the unified arch of opposite side crest.

3. The connecting sheet for a lithium iron phosphate battery according to claim 2, characterized in that:

the plate body is concavely provided with a first sinking groove corresponding to the welding area, the first sinking groove is positioned on one side of the wave crest of the bending part, and the through holes are all arranged at the first sinking groove.

4. The connecting sheet for a lithium iron phosphate battery according to claim 1, characterized in that:

the length in bar hole is greater than the length of kink, makes the both ends in bar hole extend to the outside of kink.

5. The connecting sheet for a lithium iron phosphate battery according to claim 1, characterized in that:

the four corners of the plate body are provided with round corners, and the edges are provided with chamfers.

6. The connecting sheet for a lithium iron phosphate battery according to claim 3, characterized in that:

the wall surface of the welding area, which is far away from the first sinking groove, is concavely provided with a second sinking groove, and the through holes all fall into the second sinking groove.