Pack matching method of lithium ion battery modules

A lithium-ion battery and battery technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, can solve the problems of time-consuming, labor-intensive, difficult operation, etc., achieve simple operation, improve the efficiency of grouping, and save time Effect

Active Publication Date: 2015-03-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Some battery manufacturers sort the battery capacity one by one for battery module

Method used

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  • Pack matching method of lithium ion battery modules

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Embodiment Construction

[0018] Take the 10F14 batch capacity of the produced IFP1965140 model 10F14 3000 fully charged batteries with a capacity range of 12.5-13.8Ah, which are required to be combined into 6 parallel modules. The capacity difference between modules is required to be 480mAh. The process and test data are as follows:

[0019] The extreme difference between modules is required to be 480mAh, and the number of parallel connections in each battery module is 6, so the capacity gear interval Z=480 / 6=80mAh is obtained;

[0020] Test 3,000 batteries according to their capacity, and classify the batteries that meet the capacity range of 12.5-13.8Ah into 16 levels according to the capacity standard of 80mh;

[0021] The selected gears can be combined in the following three sequence forms:

[0022] Gear sequence of Group 1: 1, 4, 7, 10, 13, 16;

[0023] Gear sequence of group 2: 2, 5, 8, 9, 12, 15;

[0024] Gear sequence of group 3: 3, 6, 8, 9, 11, 14;

[0025] And 1+4+7+10+13+16=2+5+8+9+12+1...

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Abstract

The invention discloses a pack matching method of lithium ion battery modules. The pack matching method comprises the following steps: (1) battery screening: taking a group of lithium ion batteries with qualified performance, carrying out capacity test and carrying out capacity screening according to the battery capacity requirements; (2) capacity gear division: calculating a capacity gear spacing Z according to a battery module capacity difference D and a module parallel parameter P, wherein Z is equal to D/P; dividing all the batteries into N gears according to the capacity from small to big based on the capacity gear spacing Z and setting gear serial numbers as 1 to N according to the sequence of a natural number excluding zero; (3) capacity pack matching: dividing the batteries into N gears according to the step (2), wherein Ai is the gear serial number of the selected battery; i indicates is the ith battery in each module and is less than or equal to P; the total gears among the modules of the selected matched group meets the following formula: A1(1)+A2(1)+to+AP(1)=A(2)1+A(2)2+to+A(2)P=to=A(t)1+A(t)2+to+A(t)P, wherein the superscript (t) indicates the tth battery module. The pack matching method has the advantages of high simplicity in calculation, high easiness in operation and improved pack matching efficiency.

Description

technical field [0001] The invention relates to a grouping method of lithium ion battery modules. Background technique [0002] Under the double protection of the support of relevant national policies and the continuous improvement of market application prospects, major breakthroughs have been made in lithium-ion battery technology, battery material research and related battery products, and its application prospects are already very broad: (1) The battery life of electric cars It has met the requirements of urban scooter; (2) electric buses and buses have been popularized in cities; (3) battery safety has also been greatly improved; The worst module in the group, so the key to group matching technology is to solve the consistency of battery modules. [0003] The existing matching technology focuses on solving the consistency of battery packs by strengthening the screening of battery modules. [0004] Some battery manufacturers sort battery capacity one by one for battery ...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/42
CPCH01M10/058H01M10/4207Y02E60/10Y02P70/50
Inventor 寇晓亮马冬梅贺狄龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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