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Cylindrical power battery and assembly method thereof

A power battery and cylinder technology, applied in the field of cylindrical power battery and its assembly, can solve the problems of high cost, complex assembly process, low preparation efficiency, etc., and achieve the effects of saving welding process, improving preparation efficiency, and simplifying preparation process

Pending Publication Date: 2020-08-07
GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cylindrical power battery and its assembly method to alleviate the technical problems of the existing large-size cylindrical lithium-ion battery with complex assembly process, low production efficiency and high cost

Method used

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  • Cylindrical power battery and assembly method thereof
  • Cylindrical power battery and assembly method thereof
  • Cylindrical power battery and assembly method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like figure 1 As shown, this embodiment provides a cylindrical power battery, which includes an accommodating case 100 for placing the battery cells 500, a first current collecting disk 200, a second current collecting disk 300 and a sealing assembly 400; the accommodating case One end of the 100 is provided with an assembly port, the first collector plate 200 is fixedly connected to the inner wall of the end of the accommodating case 100 away from the assembly port, and the second collector disk 300 is arranged in the accommodating case 100 and located at the assembly port. ; The sealing assembly 400 is in sealing cooperation with the assembly port, and the second collecting plate 300 is connected with the sealing assembly 400 .

[0047] Specifically, the accommodating shell 100 is set as a cylindrical hollow shell made of aluminum, and one end of the accommodating shell 100 is closed and the other end is provided with an opening, that is, an assembly port; the first c...

Embodiment 2

[0067] On the basis of the above embodiment, further, an assembly method based on a cylindrical power battery provided in this embodiment includes the assembly of the cell assembly, the welding of the first current collecting plate 200 and the packaging procedure; the assembly of the cell assembly includes: : Weld the first current collecting disc 200 on the positive aluminum foil surface of the battery core 500, and weld the second current collecting disc 300 on the negative electrode copper foil surface of the battery core 500 to form the battery core assembly; the first current collecting disc 200 welding includes: inserting the cell assembly into the accommodating case 100 through the assembling port, so that the first current collecting plate 200 abuts the inner wall of the end of the accommodating case 100 away from the assembling port; ultrasonic welding or laser Welding makes the first current collecting disc 200 connect with the inner wall of the accommodating case 100...

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Abstract

The invention provides a cylindrical power battery and an assembly method thereof, and relates to the technical field of lithium batteries. The cylindrical power battery comprises an accommodating shell for placing a battery cell, a first current collecting disc, a second current collecting disc and a sealing assembly; one end of the accommodating shell is provided with the assembling port; the first current collecting disc and the battery cell are placed in the accommodating shell through the assembling opening; the first current collecting disc is connected with the first electrode of the battery cell; the second current collecting disc is connected with the second electrode of the battery cell; and the second flow collecting disc is arranged in the containing shell and located at the assembling opening. The second flow collecting disc is also connected with the sealing assembly; the sealing assembly is in sealing fit with the assembling opening. Based on the structure, the first current collecting disc and the second current collecting disc are connected with the accommodating shell without the help of positive and anode cover plates, so that the production cost is saved, one end of the assembly port does not need to be welded, at least one welding procedure is omitted, the preparation process is simplified, and the preparation efficiency of the large-size cylindrical lithium ion battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a cylindrical power battery and an assembling method thereof. Background technique [0002] Lithium-ion batteries are widely used in new energy vehicles due to their high energy density and long service life. Lithium-ion batteries include conventional cylindrical lithium-ion batteries and large-sized cylindrical lithium-ion batteries. [0003] At present, there are openings at both ends of the shell of the conventional large-sized cylindrical lithium-ion battery. When assembling, the battery cell needs to be placed in the battery shell first, and then the positive and negative current collector plates are respectively connected to the positive and negative electrode cover plates. The welding method is to weld and seal the periphery of the positive and negative cover plates with the battery casing, and the assembly process is complicated and lengthy, resulting in low pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M2/30H01M2/22H01M2/08H01M2/02H01M10/0525H01M50/107H01M50/183H01M50/528H01M50/543
CPCH01M10/058H01M10/0525H01M50/10H01M50/183H01M50/528H01M50/543Y02E60/10Y02P70/50
Inventor 张贵萍夏信德刘建生姚培新曾炯新周彬陈高罗杰陈家辉
Owner GUANGZHOU GREAT POWER ENERGY & TECH CO LTD