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Method for charging battery of electric road vehicle

A technology for battery charging and road vehicles, applied in the field of batteries, can solve the problems of easy rise of charging voltage, rapid battery temperature rise, large battery internal resistance, etc., and achieve the effects of reducing charging time, reducing battery heat, and reducing temperature coefficient

Active Publication Date: 2013-10-02
ZHEJIANG TIANNENG BATTERY JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the great influence of temperature on the chemical reaction of the battery, the charging acceptance capacity of the battery is different under different temperature conditions. In a high-temperature environment, the battery heats up quickly and loses water quickly. In a low-temperature environment, the internal resistance of the battery is large, and the charging voltage is easy to rise.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Charging method of 12V100Ah battery in 25℃ environment

[0023] (1) Pre-charging: 5A (100A×0.05) charge to 12.6V / pc (2.1V / cell×6) or charge for 1.8h, switch to stage (2), if the battery charge does not reach 12.6V / pc, the charger Alarm, eliminate substandard batteries;

[0024] (2) Constant current charging in stage A: 19A (100A×0.19) charge to 14.4V / pc (2.4V / cell×6) or charging time reaches 4h, switch to stage (3);

[0025] (3) B stage constant current charging: 12A (100A×0.12) charging to 15V / pc (2.5V / monomer×6) or charging time reaches 1.5h, switch to (4) stage;

[0026] (4) Constant voltage charging: constant voltage 15V / piece (2.5V / cell x 6), current limit 4A (100A x 0.04) charging, charging until the current reaches 2A (100A x 0.02) or the charging time reaches 1.5h; if When step (2) is charged to 14.4V / pc, the charging time is less than 3h to switch to (5) stage, and directly switch to (6) stage under other conditions;

[0027] (5) Double-limited charging: lim...

Embodiment 2

[0030] Charging method of 12V100Ah battery in 40℃ environment

[0031] (1) Pre-charging: 4.25A (100A×0.05-50mA×(40-25)) to 12.15V / piece (2.1V×6-5mV / unit×6×(40-25)) or 1.8h , switch to stage (2), if the charging of the battery does not reach 12.15V / pc, the charger will give an alarm, and the battery that does not meet the standard will be eliminated;

[0032] (2) Constant current charging in stage A: 18.25A (100A×0.19-50mA×(40-25)) charging to 13.95V / piece (2.4V×6-5mV / unit×6×(40-25)) or When the charging time reaches 4h, switch to stage (3);

[0033] (3) B stage constant current charging: 11.25A (100A×0.12-50mA×(40-25)) charging to 14.55V / piece (2.5V×6-5mV / unit×6×(40-25)) or When the charging time reaches 1.5h, switch to stage (4);

[0034] (4) Constant voltage charging: constant voltage 14.55V / piece (2.5V×6-5mV / unit×6×(40-25)), current limit 3.25A (100A×0.04-50mA×(40-25)) Charging, charging until the current reaches 1.25A (100A×0.02-50mA×(40-25)) or the charging time reach...

Embodiment 3

[0038] Charging method of 12V100Ah battery in -15℃ environment

[0039] (1) Pre-charging: 7A (100A×0.05+50mA×(25+15)) charging to 13.8V / piece (2.1V×6+5mV / unit×6×(25+15)) or charging for 1.8h, Switch to stage (2), if the charging of the battery does not reach 13.8V / pc, the charger will give an alarm, and the battery that does not meet the standard will be eliminated;

[0040] (2) A stage constant current charging: 21A (100A×0.19+50mA×(25+15)) charging to 15.6V / piece (2.4V×6+5mV / unit×6×(25+15)) or charging When the time reaches 4h, switch to (3) stage;

[0041] (3) Phase B constant current charging: 14 A (100A×0.12+50mA×(25+15)) charging to 16.2V / piece (2.5V×6+5mV / unit×6×(25+15)) or When the charging time reaches 1.5h, switch to stage (4);

[0042] (4) Constant voltage charging: constant voltage 16.2V / piece (2.5V×6+5mV / unit×6×(25+15)), limited current 6A (100A×0.04+50mA×(25+15)) charging , charge until the current reaches 4A (100A×0.01+50mA×(25+15)) or the charging time reac...

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PUM

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Abstract

The invention discloses a method for charging a battery of an electric road vehicle. The method comprises the following steps of: (1) pre-charging; (2) A-period constant current charging; (3) B-period constant current charging; (4) constant voltage charging; (5) double-threshold charging; and (6) float charging, wherein the base number of the charging environment temperature is 25 DEG C, current and voltage in the whole charging process are adjusted in inverse proportion to the environment temperature, a current adjustment coefficient is 30 to 80 mA / DEG C, a voltage adjustment coefficient in the step (6) is 3 to 4 mV / monomer.DEG C, and a voltage adjustment coefficient in other steps is 5 to 6 mV / monomer.DEG C. By adjusting charging parameters under different temperature conditions, a charging effect of the battery at different temperatures is ensured, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the field of accumulators, in particular to a battery charging method for electric road vehicles. Background technique [0002] Electric road vehicle batteries are used in low-speed electric vehicles. As power energy storage devices, they are generally connected in series from 48V to 96V. Due to the great influence of temperature on the chemical reaction of the battery, the charging acceptance capacity of the battery is different under different temperature conditions. In a high temperature environment, the battery heats up quickly and loses water quickly. In a low temperature environment, the internal resistance of the battery is large, and the charging voltage is easy to rise. Therefore, it is particularly important to ensure the charging effect of the battery at different temperatures by adjusting the charging parameters under different temperature conditions. Contents of the invention [0003] The technical problem to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44B60L11/18
CPCY02E60/10Y02T10/70
Inventor 李春景方明学陈战营
Owner ZHEJIANG TIANNENG BATTERY JIANGSU
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