CN218525700U

CN218525700U - Connection piece welding low internal resistance structure and battery pack

Info

Publication number: CN218525700U
Application number: CN202222116675.5U
Authority: CN
Inventors: 李�亨; 王凤岗
Original assignee: Zhejiang Tekang Electronic Technology Co ltd
Current assignee: Zhejiang Tekang Electronic Technology Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-02-24
Anticipated expiration: 2032-08-11

Abstract

The utility model relates to a connection piece welding low internal resistance structure sets up and is used for connecting battery and PCB board in the group battery unit, including the body, the body includes two battery connection pieces, and the one end of battery connection piece is buckled and is divided into connecting portion, the portion of bending and conductive part with the battery connection piece, and two battery connection pieces are connected through connecting portion and are the mirror image setting, and wherein the portion of bending of a slice battery connection piece is equipped with first opening, and the portion of bending of another battery connection piece is equipped with the second opening, first opening and second opening dislocation set. The utility model discloses set up first opening and second opening, reduced the area of contact of two battery connection pieces, constitute the battery package with two liang of series connection of group battery unit, during the welding of rethread PCB board, can effectively reduce two continuous battery connection piece welding point internal resistances, increase the ability of overflowing, make the battery package generate heat in the use speed slow, get into the time lapse of high temperature protection state, release more battery capacity, consumer experiences effectually.

Description

Connection piece welding low internal resistance structure and battery pack

Technical Field

The utility model relates to a battery technology field, especially a connection piece welding hangs down internal resistance structure and battery package.

Background

The problem that the battery package exists at present is that the battery package gets into high temperature protection just not discharged because of generating heat in the use, influences the use.

Chinese patent No. CN201345384Y in the prior art discloses a battery pack, which comprises a plurality of single batteries and battery connecting sheets, wherein the single batteries are connected in series or in parallel or in series-parallel by the battery connecting sheets, and grooves are arranged on the surfaces of the battery connecting sheets, and the grooves are broken to play a safety role when mechanical external force is applied.

Above-mentioned prior art can get up two liang of series connections of group battery through the connection piece and constitute the battery package, rethread PCB welding, but the connection piece welding point internal resistance value that links to each other is high, and the current capacity is relatively poor, can lead to the battery package to generate heat faster in the use that discharges, gets into the high temperature protection state and in advance, can't emit more battery capacity, and consumer user experience effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to reach the purpose provide exactly a connection piece welding hangs down internal resistance structure, effectively reduces and connects the internal resistance, increases the ability of overflowing.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a connection piece welding low internal resistance structure, sets up and is used for connecting battery and PCB board in group battery unit, includes the body, the body includes two battery connection pieces, the one end of battery connection piece is buckled and is divided into connecting portion, the portion of bending and conductive part with the battery connection piece, and two battery connection pieces are connected through connecting portion and are the mirror image setting, and wherein the portion of bending of a slice battery connection piece is equipped with first opening, and the portion of bending of another battery connection piece is equipped with the second opening, first opening and second opening dislocation set.

Preferably, the opening directions of the first opening and the second opening extend outwards to the end part of the battery connecting sheet along the connecting part.

Preferably, the connection parts of the two battery connection pieces are arranged on the PCB in a penetrating mode and fixed through soldering tin.

Preferably, the conductive parts of the two battery connecting sheets are far away from each other and arranged in parallel, and a heat dissipation channel is formed between the two conductive parts.

Preferably, at least one shunt groove is arranged on the conductive part, and the shunt groove is arranged in a long strip shape along the length direction of the conductive part.

Preferably, a plurality of bumps are arranged on two sides of the shunting groove, and the bumps are arranged on the outer side of the heat dissipation channel and used for being in spot welding with a battery cell of a battery.

Preferably, both sides of the conductive part are respectively provided with a positioning slot.

Another object of the utility model is to provide a battery pack, establish ties or parallelly connected or the series-parallel connection constitutes including a plurality of battery pack units, be equipped with the low internal resistance structure of foretell connection piece welding in the battery pack unit.

After the technical scheme is adopted, the utility model has the advantages of as follows:

through setting up first opening and second opening, the area of contact of two battery connection pieces has been reduced, constitute the battery package with two liang of series connection of group battery unit, during the welding of rethread PCB board, can effectively reduce two continuous battery connection piece welding point internal resistances, increase the ability of overflowing, and first opening and second opening dislocation set, the opening leaks from first opening and second opening from making molten tin too greatly when avoiding soldering tin, make the battery package generate heat in the use speed and slow, the time that gets into the high temperature protection state shifts backward, can release more battery capacity, consumer user experiences effectually.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of a battery pack unit according to the present invention;

fig. 2 is a schematic side view of the body of the present invention;

fig. 3 is a schematic perspective view of the body of the present invention;

fig. 4 is a schematic perspective view of the body of the present invention;

fig. 5 is a front view of the body of the present invention;

fig. 6 is a schematic structural view of the battery pack of the present invention.

Reference numerals:

1. a battery; 2. a PCB board; 3. a body; 31. a battery connecting sheet; 311. a connecting portion; 312. a bending part; 313. a conductive portion; 3131. a splitter box; 3132. salient points; 3133. positioning the clamping groove; 314. a first opening; 315. a second opening; 4. and a heat dissipation channel.

Detailed Description

In order to explain the overall concept of the present invention more clearly, the present invention will be further explained with reference to the accompanying drawings and specific embodiments. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used in an orientation or positional relationship relative to one another only as illustrated in the accompanying drawings and are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.

The utility model provides a connection piece welds low internal resistance structure, as shown in fig. 1-6, sets up and is used for connecting battery 1 and PCB board 2 in the group battery unit, includes body 3, body 3 includes two battery connection pieces 31, the one end of battery connection piece 31 is buckled and is divided into connecting portion 311, the portion of bending 312 and conductive part 313 with battery connection piece 31, and two battery connection pieces 31 are connected through connecting portion 311 and are the mirror image setting, and wherein the portion of bending 312 of a battery connection piece 31 is equipped with first opening 314, and the portion of bending 312 of another battery connection piece 31 is equipped with second opening 315, first opening 314 and second opening 315 dislocation set.

Specifically, referring to fig. 3 and 4, the opening directions of the first opening 314 and the second opening 315 each extend outward along the connecting portion 311 to the end of the cell connecting tab 31.

The utility model discloses a set up first opening 314 and second opening 315, reduced the area of contact of two battery connection pieces 31, constitute the battery package with two liang of series connection of battery pack unit, when passing through PCB board 2 welding again, can effectively reduce two battery connection pieces 31 welding point internal resistances that link to each other, increase the ability of overflowing, and first opening 314 and second opening 315 dislocation set, the opening leaks down from first opening 314 and second opening 315 when avoiding soldering tin too big messenger's fused tin.

In order to improve the stability of the connection structure and better heat dissipation, the connection portions 311 of the two battery connection plates 31 are inserted into the PCB 2 and fixed by solder. The conductive portions 313 of the two battery connecting sheets 31 are arranged away from each other and in parallel, and a heat dissipation channel 4 is formed between the two conductive portions 313. The whole battery connecting sheet 31 is only clung to the connecting part 311, other parts are separated, heat dissipation of the battery connecting sheet 31 is facilitated, and a heat insulation medium can be filled in the heat dissipation channel 4, so that the heat insulation effect is further improved.

In order to facilitate better spot welding with the battery cell of the battery 1, as shown in fig. 5, at least one shunt slot 3131 is disposed on the conductive portion 313, and the shunt slot 3131 is disposed in a long strip shape along the length direction of the conductive portion 313. A plurality of bumps 3132 are disposed on two sides of the shunt slot 3131, and the bumps 3132 are disposed outside the heat dissipation channel 4 for spot welding with a battery cell of the battery 1. The battery 1 is separated on two sides of the shunt groove 3131 and is electrically welded, so that local overheating of the battery 1 in the use process is effectively avoided, and the service life of the battery 1 is prolonged.

In order to facilitate the installation and fixation of the battery connecting sheet 31, two sides of the conductive portion 313 are respectively provided with a positioning slot 3133. The number and the position of the positioning clamping groove 3133 can be increased, decreased and adjusted according to actual application requirements, the battery connecting sheet 31 can be stably limited in the battery pack through the positioning clamping groove 3133, and the position deviation in the moving and carrying processes is avoided.

Another object of the utility model is to provide a battery pack, establish ties or parallelly connected or the series-parallel connection constitutes including a plurality of battery pack units, be equipped with the low internal resistance structure of foretell connection piece welding in the battery pack unit. The heating speed of the battery pack in the using process is reduced, the time for entering a high-temperature protection state is shifted backwards, more battery capacity can be released, and the experience effect of a consumer is good.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a connection piece welding hangs down internal resistance structure, sets up and is used for connecting battery and PCB board in group battery unit, its characterized in that: the battery connecting piece comprises a body, the body includes two battery connecting pieces, the one end of battery connecting piece is buckled and is divided into connecting portion, the portion of bending and conductive part with the battery connecting piece, and two battery connecting pieces pass through connecting portion and connect and be the mirror image setting, and wherein the portion of bending of a slice battery connecting piece is equipped with first opening, and the portion of bending of another slice battery connecting piece is equipped with the second opening, first opening and second opening dislocation set.

2. The connecting sheet welding low internal resistance structure according to claim 1, characterized in that: the opening directions of the first opening and the second opening extend outwards to the end part of the battery connecting sheet along the connecting part.

3. The connecting sheet welding low internal resistance structure according to claim 2, characterized in that: the connecting parts of the two battery connecting sheets penetrate through the PCB and are fixed through soldering tin.

4. The connection piece welding low internal resistance structure according to claim 3, characterized in that: the conductive parts of the two battery connecting sheets are far away from each other and arranged in parallel, and a heat dissipation channel is formed between the two conductive parts.

5. The connection piece welding low internal resistance structure according to claim 4, characterized in that: and heat insulation media are filled in the heat dissipation channel.

6. The connecting sheet welding low internal resistance structure according to claim 5, characterized in that: the conductive part is provided with at least one shunt groove which is arranged in a long strip shape along the length direction of the conductive part.

7. The connecting sheet welding low internal resistance structure according to claim 6, characterized in that: a plurality of salient points are arranged on two sides of the shunting groove, and the salient points are arranged on the outer side of the heat dissipation channel and used for being in spot welding with a battery core of a battery.

8. The connection piece welding low internal resistance structure according to claim 7, characterized in that: and positioning clamping grooves are respectively arranged on two sides of the conductive part.

9. A battery pack comprises a plurality of battery pack units which are connected in series or in parallel or in series-parallel, and is characterized in that: the battery pack unit is internally provided with a connecting sheet welding low internal resistance structure according to claims 1-8.