CN216389651U

CN216389651U - Cylindrical battery

Info

Publication number: CN216389651U
Application number: CN202123206112.7U
Authority: CN
Inventors: 何锦镖; 江英凯; 李钦培
Original assignee: Guangdong Haozhi Technology Co Ltd
Current assignee: Guangdong Haozhi Technology Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-04-26
Anticipated expiration: 2031-12-20

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a cylindrical battery which comprises a cap, an outer shell and a bare cell, wherein the bare cell is a full-lug cell, the upper end and the lower end of the outer shell are respectively provided with a punching groove, the positive pole and the negative pole of the bare cell are respectively connected with the surfaces of an upper confluence sheet and a lower confluence sheet, the upper confluence sheet and the lower confluence sheet are respectively connected with the cap, and the cap is fixed on the punching groove to form a structure of a sealed outer shell. The utility model can prevent the battery from deforming and the electrolyte from leaking and has high use efficiency.

Description

Cylindrical battery

Technical Field

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a cylindrical battery.

Background

Along with electronic toy, electronic fitment apparatus, other electric actuator's such as electronic agricultural tool use increases, market is also higher and higher to the demand of high magnification battery, the battery commonly used is unipolar ear or two utmost point ear, the multiplying power of battery is lower, can't satisfy the operation requirement, nowadays, also there is the battery of full utmost point ear, like chinese utility model patent CN 207765484U discloses a full utmost point ear cylinder battery includes the casing and locates on this casing and with the block and the full utmost point ear of this casing insulating connection, the block is connected with the electrode water conservancy diversion end face contact of full utmost point ear electricity core, the block is used as mass flow body and packaging structure simultaneously. In the process of assembling the battery, the positive and negative caps are connected to the corresponding electrode flow guide end faces at one time by adopting an ultrasonic connection mode, but the current collector and the caps of the battery are directly connected, so that the contact point is small, the conductivity is poor, poor contact can occur in the use process, and the battery cannot be normally used. Still some connection methods of mass flow body and block are connected battery tab lead-out wire and block, however when the perforation appears in the tie point, the weeping will appear, cause electrolyte can corrode the casing surface, cause the deformation of battery, unable normal use, therefore prior art needs further improvement.

Disclosure of Invention

The utility model aims to provide a cylindrical battery which can prevent the deformation of the battery and the leakage of electrolyte and has high use efficiency.

The utility model provides a cylindrical battery, includes block, shell and naked electric core, the upper end and the lower extreme of shell set up the dashpot respectively, the positive pole and the negative pole of naked electric core are connected with last confluence piece and lower confluence piece respectively, and wherein go up the confluence piece and be connected with the block respectively with lower confluence piece. The cylindrical battery provided by the utility model comprises the upper and lower confluence pieces, and the structure enables the two ends of the bare cell to be connected with the outer conductor (cap) in a large area, so that the heat productivity of the connection part is reduced in the charging and discharging process, and the high-rate charging and discharging performance of the battery is improved. The purpose of setting up the dashing groove is in order to fix naked electric core, makes it can not take place to shift at the in-process of processing.

Furthermore, the naked electric core is a full-lug electric core or a multi-lug (the number of lugs is more than or equal to 3) winding electric core. When this naked electric core structure made electric core operating mode to use, electric current evenly distributed was inside electric core.

Further, the cap comprises an upper cap and a lower cap, and the upper bus bar and the lower bus bar are respectively connected with the upper cap and the lower cap.

Furthermore, the shell is made of steel materials. The traditional shell material usually uses aluminum material, and the hardness of the aluminum material is not high, so that the mechanical property is poor, and a punching groove cannot be arranged on the aluminum shell, so that a welding method is needed when the tab is packaged, the process is more complicated, and the cost is higher. According to the utility model, the shell is made of steel material, so that the hardness of the material is high, the mechanical property is good, the punching groove can be arranged on the shell, the processing procedure is simplified, and the cost is reduced.

Furthermore, the upper and lower bus bars are made of conductive metal.

Furthermore, the upper and lower confluence plates are both circular and are provided with holes at the center of the circular cross section. The holes may be used to inject electrolyte into the cell through the holes during the cell manufacturing process.

Furthermore, the upper confluence sheet is provided with a first L-shaped connecting sheet, the transverse sheet surface of the first L-shaped connecting sheet is connected with the upper surface of the upper confluence sheet, and the vertical sheet surface of the first L-shaped connecting sheet is connected with the upper cover cap.

Furthermore, the lower confluence piece is provided with a second L-shaped connecting piece, the transverse piece surface of the second L-shaped connecting piece is connected with the lower surface of the lower confluence piece, and the vertical piece surface of the second L-shaped connecting piece is connected with the lower cover cap.

Further, the washtrough is the ring form to the circular cross section of washtrough is parallel with the circular cross section of naked electric core.

Furthermore, the block include block body and retainer plate, the block body be circular, the retainer plate is the ring form, retainer plate and block body integrated into one piece, can fix the block on the notching through the punching press effect.

The bare cell is sleeved with the outer shell, so that the deformation of the cell or the corrosion of electrolyte can be effectively prevented, the bare cell uses a full-lug cell, the service efficiency of the cell can be increased, the bare cell is also provided with the upper bus piece and the lower bus piece which are connected with the bare cell, the upper bus piece and the lower bus piece are also connected with the cap, the upper bus piece and the lower bus piece can increase the contact area between the cap and the full-lug cell and increase the conduction efficiency, the outer shell is also provided with the punching groove, and the cap can be punched and fixed by using the acting force generated by punching in the process of connecting the cap and the outer shell, and the cap and the outer shell are tightly connected after being fixed, so that the structure for sealing the whole bare cell is formed, and the leakage of the electrolyte is prevented.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Example (b):

as shown in fig. 1, a cylindrical battery comprises a bare cell 1, the bare cell 1 is a full-tab cell, the bare cell 1 is cylindrical, a cylindrical outer shell 2 is sleeved outside the bare cell 1, the upper part and the lower part of the outer shell 2 are respectively provided with a notching 21, an upper confluence plate 3 and a lower confluence plate 4 are both circular conductive metal sheets, a hole 9 is arranged at the center of the circular cross section of the upper confluence plate 3 and the lower confluence plate 4, the positive electrode of the bare cell 1 is connected with the lower surface of the upper confluence plate 3, the negative electrode of the bare cell 1 is connected with the upper surface of the lower confluence plate 4, the upper confluence plate 3 and the lower confluence plate 4 are respectively connected with a cap, the cap is circular, the block be two and be upper cover block 5 and lower cover block 6 respectively, go up to be equipped with first L type connection piece 7 on the piece 3 that converges, the horizontal piece face of first L type connection piece 7 is connected with the upper surface of last piece 3 that converges, the vertical piece face of first L type connection piece 7 is connected with the inboard lower surface of upper cover block 5. The lower confluence piece 4 is provided with a second L-shaped connecting piece 8, the transverse piece surface of the second L-shaped connecting piece 8 is connected with the lower surface of the lower confluence piece 4, and the vertical piece surface of the second L-shaped connecting piece 7 is connected with the upper surface of the inner side of the lower cover cap 6. First L type connection piece 7 and second L type connection piece 8 are formed by conductive metal, and the dashpot 21 is located the upper end and the lower tip of shell 2 respectively for the ring form, and the circular cross section of dashpot 21 is parallel with the circular cross section of naked electric core 1. The upper cap 5 and the lower cap 6 are fixed on the punching groove 21 by punching action, and the structure of the sealed shell 2 is formed. The cap comprises a cap body 51 and a fixing ring 52, the fixing ring 52 is annular, the cap body 51 and the fixing ring 52 are integrated, and the cap is fixed on the punching groove 21 through punching. The connection mode is welding.

During the use, establish in shell 2 with naked electric core 1 cover earlier, the inside wall of shell 2 and the inseparable laminating of the lateral wall of naked electric core 1, then carry out the punching press in order to form the dashpot 21 to the shell to it is fixed with naked electric core. At this moment, naked electric core 1's positive pole and 3 lower surface connections of last confluence piece, naked electric core 1's negative pole and 4 upper surface connections of lower confluence piece, then, with the vertical plate surface and the last block 5 welding of first L type connection piece 7, the vertical plate surface of second L shape connection piece and the welding of block 6 down form the electric current return circuit, afterwards, fix on the dashing groove 21 through the punching press effect with lower block 6, pour into electrolyte into, finally, fix on the dashing groove 21 through the punching press effect with upper block 5 again.

Claims

1. The utility model provides a cylindrical battery, includes block, shell and naked electric core, its characterized in that, the upper end and the lower extreme of shell set up the dashpot respectively, the positive pole and the negative pole of naked electric core converge piece and lower confluence piece respectively and be connected with last confluence piece, and wherein it converges piece and lower confluence piece respectively and is connected with the block to go up.

2. The cylindrical battery according to claim 1, wherein the cap comprises an upper cap and a lower cap, and wherein the upper bus bar and the lower bus bar are connected to the upper cap and the lower cap, respectively.

3. The cylindrical battery as claimed in claim 1, wherein the material of the case is a steel material, and the material of the upper and lower bus bars is a conductive metal.

4. The cylindrical battery as claimed in claim 1, wherein the upper and lower bus bars are circular and have a hole at the center of the circular cross section.

5. The cylindrical battery according to claim 1, wherein the upper bus bar is provided with a first L-shaped connecting piece, the transverse piece surface of the first L-shaped connecting piece is connected with the upper surface of the upper bus bar, and the vertical piece surface of the first L-shaped connecting piece is connected with the upper cover cap.

6. The cylindrical battery according to claim 1, wherein the lower bus bar is provided with a second L-shaped connecting piece, the transverse piece surface of the second L-shaped connecting piece is connected with the lower surface of the lower bus bar, and the vertical piece surface of the second L-shaped connecting piece is connected with the lower cover cap.

7. The cylindrical battery of claim 1, wherein the notching is circular and has a circular cross-section parallel to the circular cross-section of the bare cell.

8. The cylindrical battery as claimed in claim 1, wherein the cap comprises a cap body and a fixing ring, and the cap body and the fixing ring are integrated.