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Valve-regulated lead-acid battery equalizing charge method

A lead-acid battery, balanced charging technology, applied in secondary battery charging/discharging, secondary battery repair/maintenance, etc.

Active Publication Date: 2011-07-27
泰州方略科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when charging in series, it must be charged with a total full-charge termination voltage higher than the theoretical sum of each single cell battery in series, so that it is possible to equalize the capacity and achieve the purpose of balanced charging, but this method not only makes each single cell battery The large increase in water loss also makes the water loss of a single cell battery with a lower capacity more serious

Method used

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  • Valve-regulated lead-acid battery equalizing charge method
  • Valve-regulated lead-acid battery equalizing charge method
  • Valve-regulated lead-acid battery equalizing charge method

Examples

Experimental program
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Effect test

Embodiment 1）

[0031] The balanced charging method of the valve-regulated lead-acid battery of this embodiment includes: charging the battery with a constant current charging method at the initial stage of charging, and the charging current is 0.1C; when the measured current battery voltage reaches the theoretical oxygen voltage, stop charging for several minutes (take any value between 5-10 minutes) After cooling down, start charging with constant voltage charging, and the initial charging current of constant voltage charging is 0.09C, and control the charging current during constant voltage charging to charge for 5 seconds and stop for 2 Seconds; until the battery voltage reaches the rated saturation voltage, suspend charging for a few minutes (take any value between 8-12 minutes), enter the balanced charging stage; balanced charging is based on the charging current of 0.03C, charging The charging method is 2 seconds and 5 seconds off. When the difference between the measured battery voltag...

Embodiment 2）

[0048] See Figure 4-6 , the charging device applying the balanced charging method of the above-mentioned valve-regulated lead-acid battery, comprising: a rectification power supply circuit 1, a pulse power amplification and a voltage transformer for providing charging power to the storage battery connected to the power supply output end of the rectification power supply circuit 1 Circuit 4, a charge sampling circuit 3 for detecting charging current and voltage, and a charge control circuit 2 for controlling the output voltage of the pulse power amplification and voltage transformation circuit 4; the charge control circuit 2 is suitable for passing through the charge sampling circuit 3 Collect the rising speed of the battery voltage, and the charging control circuit 2 is also suitable for calculating the real-time internal resistance R of the battery through the charging current measured by the charging sampling circuit 3 and the fixed charging voltage t , in the case of ambie...

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PUM

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Abstract

The invention relates to a valve-regulated lead-acid battery equalizing charge method suitable for equalizing the capacity of each single-cell battery in a charging process, and avoiding from losing a lot of water in the charging process, comprising the following steps: charging a storage battery by adopting a constant-current charging manner at the beginning of charging; when the voltage of the storage battery reaches the voltage of theatrical oxygen evolution, stopping charging for minutes and cooling; starting constant-current charging; controlling the charging current; and charging by a manner of charging for 5 seconds and stopping for 2 seconds; when the rated saturated voltage is reached, stopping charging for minutes; and entering an equalizing charge stage. The equalizing charge is carried out in the charging manner of taking 0.03C as a charging current and charging for 2 seconds and stopping for 5 seconds; charging is stopped for some time when the condition that the difference of the storage battery voltage and the rated saturated voltage of the storage battery is larger than a preset value is detected; and meanwhile, the decreasing speed of the voltage is detected, if the decreasing speed is larger than the set value, the equalizing charge is continued, and if the decreasing speed does not reach the set value, the whole charging process is stopped.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a method for equalizing charging of a valve-regulated lead-acid battery. Background technique [0002] A lead-acid battery is composed of multiple cells connected in series. The two most important factors for the premature end of life of valve-regulated lead-acid batteries are softening corrosion of the positive grid and excessive loss of water from the electrolyte. For the maintenance-free valve-regulated lead-acid battery, the capacity will be reduced by 20% if the water loss is 10%, and the life will be terminated if the water loss is 25%. Therefore, how to reduce the water loss during the charging process of this type of battery has become the key to prolonging the life of the valve-regulated lead-acid battery. [0003] The main form of dehydration of valve-regulated lead-acid batteries is that when the charging voltage rises to a single cell voltage of 2.35V, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 杨龙兴
Owner 泰州方略科技咨询有限公司