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Cylindrical lithium ion power battery shell and manufacturing method thereof

A technology of power battery and manufacturing method, applied in the manufacture of battery case and cylindrical lithium-ion power battery case, can solve the problems of battery explosion, low mechanical strength, poor thermal conductivity, etc. The effect of anti-vibration performance

Pending Publication Date: 2019-04-05
广州云通锂电池股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are significant deficiencies in these two structures of lithium-ion power batteries: First, because the battery case is made of single-layer stainless steel, the mechanical strength is low, and it is easy to be inflated and deformed, squeezed and deformed, or even explode in extreme cases. Safety accidents; second, the hard plastic battery case has poor thermal conductivity and little room for shrinkage, which may also lead to the possibility of battery explosion in extreme cases
The lithium-ion power battery produced by the battery shell of the existing structure has great potential safety hazards
Third, lithium-ion batteries produced from hard plastic battery cases have many technical problems in the recycling of the case, and discarding them will cause serious environmental pollution problems

Method used

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  • Cylindrical lithium ion power battery shell and manufacturing method thereof
  • Cylindrical lithium ion power battery shell and manufacturing method thereof
  • Cylindrical lithium ion power battery shell and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of safety battery shell of cylindrical lithium-ion power battery provided by the present invention, refer to Figure 1 to Figure 5 , including the outer shell 1, the inner shell 2, the connecting part 3 of the inner and outer shells, and the foam filling layer 4 between the inner and outer shells; the bottom of the cylindrical outer shell 1 and the outer shell The bottom edge of 2 is connected by welding, the outer cylindrical outer wall of outer shell 1 is connected by welding, and the S-shaped connecting part 3 is connected with the outer cylindrical wall of inner shell 2 by welding, and the lower edge of inner shell 2 is connected with outer shell 1 The inner side of the bottom is welded and connected, and there is a light, elastic foam filling layer 4 between the inner and outer shells.

[0044] More specifically, the outer shell 1 is pressed into a cylindrical body by a metal plate with a thickness of 1-5mm, specifically including the shell wall and the shel...

Embodiment 2

[0049] A manufacturing method of a cylindrical lithium-ion power battery case provided in Example 1 includes the following steps:

[0050] Step A): pressing a stainless steel plate with a thickness of 1 mm to form a cylindrical outer shell; Step B): cutting the stainless steel with a thickness of 0.1 mm to the required size, pressing two Z-shaped folded parts with a width of 1 mm, Re-rolling / welding to make a cylindrical inner shell; step C): press a stainless steel plate with a thickness of 0.1mm and a hole with a diameter of 2.5mm to form an S-shaped connection; step D): put 2 One end of the S-shaped connection part is bonded to the outside of the inner shell with conductive glue; Step E): Weld the bottom edge of the memory case (2) to the bottom of the outer shell (1), and the other end of the S-shaped connection part Bond or weld the inner side of the outer shell with conductive adhesive; Step F): Inject the foam filling layer between the inner and outer shells to about 1-...

Embodiment 3

[0061] Another manufacturing method of a cylindrical lithium-ion power battery case provided in Example 2 includes the following steps:

[0062] Step A): pressing a stainless steel plate with a thickness of 5mm to form a cylindrical outer shell; Step B): cutting the stainless steel with a thickness of 0.5mm into the required size, pressing four Z-shaped folding parts with a width of 5mm, Then crimp / weld to make a cylindrical inner shell; step C): press a stainless steel plate with a thickness of 0.5mm and a hole diameter of 10mm to form an S-shaped connection; step D): put 4 S One end of the S-shaped connection part is glued or welded to the outside of the inner shell; Step E): Weld the bottom edge of the memory shell to the bottom of the outer shell, and the other end of the S-shaped connection part is glued with conductive glue Or welded on the inner side of the outer shell; Step F): Inject the foam filling layer between the inner and outer shells to about 1-3mm higher than ...

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Abstract

The invention discloses a cylindrical lithium ion power battery shell and a manufacturing method thereof, and aims to provide the cylindrical lithium ion power battery shell and the manufacturing method which have good safety performance and have the advantage that the waste battery shell does not cause serious environmental pollution after the produced battery is discarded. In the technical scheme, the manufacturing method comprises the steps of (A) pressing a metal plate with a thickness of 1-5 mm into a cylindrical outer-layer shell; (B) cutting the metal plate with the thickness of 0.1-0.5mm into the required size, pressing 2-4 Z-shaped folding parts with a width of 1-5 mm, rolling or welding a seam to prepare the cylindrical inner-layer shell; (C) pressing the metal plate with a thickness of 0.1-0.5 mm into S-shaped connecting parts, wherein one ends of the 2-4 S-shaped connecting parts are bonded to an outer side of the inner-layer shell by using a conductive adhesive; (D) welding the bottom edge of the inner-layer shell to the bottom of the outer-layer shell, wherein the other ends of the S-shaped connecting parts in the step (3) are bonded to an inner side of the outer-layer shell by using the conductive adhesive; and (E) injecting a foam filling layer between the inner-layer shell and the outer-layer shell. The cylindrical lithium ion power battery shell and the manufacturing method thereof belong to the technical field of chemical power supply.

Description

technical field [0001] The invention relates to a method for manufacturing a battery case, in particular to a method for manufacturing a cylindrical lithium-ion power battery case, and belongs to the technical field of chemical power sources. Background technique [0002] With the development and application of new energy technologies, especially the widespread promotion and application of all-electric vehicles and hybrid vehicles, the safety of lithium-ion power batteries has become an important issue for the whole society, especially for new energy vehicle manufacturers and new energy vehicles. One of the important hotspots of concern to readers. [0003] As we all know, the safety essence of lithium-ion batteries is determined by the characteristics of the existing lithium-ion generation raw materials, mainly due to the oxygen released by the decomposition of the positive active material of lithium-ion batteries and the flammable electrolyte, followed by the structure of ...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M2/10H01M10/04H01M10/0525H01M10/613H01M10/625H01M10/643H01M10/653H01M10/654H01M10/6551H01M10/058B82Y30/00H01M50/10H01M50/116H01M50/124H01M50/249
CPCH01M10/0422H01M10/0525H01M10/058H01M10/613H01M10/625H01M10/643H01M10/653H01M10/654H01M10/6551B82Y30/00H01M2200/20H01M2200/00H01M50/10H01M50/116H01M50/124H01M50/20Y02E60/10Y02P70/50
Inventor 詹炳然王建红
Owner 广州云通锂电池股份有限公司
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