Charge method of lithium ion power storage battery

A technology of power battery and charging method, which is applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, etc., which can solve problems such as rising and aggravating differences, so as to improve imbalance, improve work performance, and avoid cycle loss Effect

Inactive Publication Date: 2010-08-11
江苏华富控股集团有限公司
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Problems solved by technology

But even if all of them can be maintained, but only one cannot be maintained, then since the total voltage is constant, when one voltage drops, the other voltages will inevitably rise as a whole or individually, which is also the same. There will be increased differences

Method used

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  • Charge method of lithium ion power storage battery

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Embodiment Construction

[0019] Take the charging of 36V / 10Ah lithium iron phosphate power lithium-ion battery as an example.

[0020] 1. Traditional charging method:

[0021] Under the condition of 1 standard atmospheric pressure, ambient temperature 25±5℃, ambient humidity ≤85%RH, charge at 0.33C constant current to battery pack charge limit voltage 43.8V (single cell limit voltage 3.65V) and then constant voltage charge When the charging cut-off current is 0.01C, the charging ends, and the charging curve is figure 1 shown.

[0022] 2. Adopt the multi-stage constant current method of the present invention:

[0023] Under the conditions of 1 standard atmospheric pressure, ambient temperature 25±5°C, and ambient humidity ≤85%RH, different charging currents are adopted at different voltages. Since the current in the constant voltage stage decreases gradually, the smooth curve of the constant voltage stage is divided into multiple small steps in the form of calculus for approximation, and the approxi...

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Abstract

The invention discloses a charge method of a lithium ion power storage battery, relating to the field of charge technology of lithium ion power storage batteries. The charge environmental conditions are as follow: one standard atmospheric pressure, temperature 25 plus or minus 5 DEG C and humidity is less than or equal to 85% RH, and different constant currents are adopted to charge the battery under different voltage limiting stages. Through the charge method, the battery can not be overcharged and can be charged fully, thus having equilibration function. Meanwhile, the voltage range of the current equilibration process is reduced, thus unnecessary circulation loss of a single battery cell can be avoided as much as possible, the problem of charge unbalancedness of a battery pack can be solved and the working performance can be improved.

Description

technical field [0001] The invention relates to the technical field of accumulators, in particular to the technical field of charging power lithium-ion accumulators. Background technique [0002] With the soaring price of international crude oil, the research of various new energy sources has become the focus of public attention. Electric energy has been widely used as a power source in various vehicles. Lithium batteries have become the first choice for power electric energy due to their high energy-to-mass ratio and energy-to-volume ratio, no memory effect, many rechargeable times, and long service life. However, under the existing conditions, the consistency of the produced batteries is not good, which in turn affects the performance and overall life of the batteries, so there are certain obstacles in the application in the field of power batteries. [0003] The charging process of the lithium-ion battery pack currently used is divided into two stages: the constant curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCY02E60/10
Inventor 沙树勇孙庆王晓玲代云飞周寿斌
Owner 江苏华富控股集团有限公司
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