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A kind of lithium-ion battery assembly method

A lithium-ion battery, battery technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., to achieve the effects of excellent efficiency, high capacity, and large depth of discharge

Active Publication Date: 2016-05-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no simple and effective sorting method that can realize the capacity and self-discharge consistency of each module in the battery pack

Method used

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  • A kind of lithium-ion battery assembly method
  • A kind of lithium-ion battery assembly method
  • A kind of lithium-ion battery assembly method

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with specific embodiments.

[0018] Take the produced IFP1965140 model 13L25 batch capacity range of 12.8-13.5Ah fully charged battery cells 1# box and 2# box, 80 each, and it is required to form 5 parallel battery packs. According to the traditional grouping method and the grouping method of the present invention, a group of battery packs are respectively equipped for detection. Wherein the number of the battery pack made by the traditional matching method is P13L2501, and the number of the battery pack made by the matching method of the present invention is P13L2502, the process and test data are as follows:

[0019] Traditional matching method P13L2501 matching process:

[0020] Conduct voltage test on 80 batteries in 2# box, pick out 2 batteries with open circuit voltage lower than 3.340V, then conduct internal resistance test, pick out 1 battery with internal resistance greater than 6mΩ...

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Abstract

The invention discloses a lithium ion battery assembling method which comprises the following steps that (1) single lithium ion batteries are subjected to a small-current capacity test and a large-current capacity test one time respectively, testing data C2 and C2 are stored, R is defined as the large-current charging ability and is equal to C2 / C1, the R value is calculated, and cells with abnormal R values are picked out; (2) the remaining qualified single batteries after selection are stored in a fully-charged mode and then is charged, and battery classification is carried out according to the charging capacities; (3) single batteries in the same charging capacity level form S-series P-parallel battery packs according to large-current capacity through the assembling method that high-capacity batteries are matched with low-capacity batteries. By means of the method, through simple operation, consistency of module capacity and self-discharging in the battery packs is effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a lithium ion battery assembly method. Background technique [0002] Under the dual impetus of the national "863" electric vehicle major project and market prospects, the research on key technologies, key materials and products of lithium-ion power batteries has made significant progress. Its technical and economic advantages are significant, and the conditions for popularization and application have become increasingly mature: (1) specific power and service life have basically met the requirements of electric vehicles; (2) lithium-ion power batteries themselves have no serious safety problems; (3) From the perspective of operating economy and year-on-year price, the economy of lithium-ion power batteries is far better than that of lead-acid power batteries; (4) The current production capacity construction of lithium-ion power batteries has begun to take shape. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42
CPCH01M10/4207Y02E60/10
Inventor 马冬梅贺狄龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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