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Grading constant current charging method with voltage-controlled pulse

A technology of constant current charging and pulse charging and discharging, which is applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, etc., and can solve the problems of charging power loss and long charging process time, etc.

Inactive Publication Date: 2014-03-12
中国船舶重工集团公司第七〇一研究所 +1
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Problems solved by technology

The result of this phenomenon is: the whole charging process takes a long time, the battery voltage in the final charging stage is higher than the gas evolution point for a long time, resulting in violent gas evolution, and most of the charged electric energy is lost in the electrolytic water reaction of the solution instead of increasing the solution density. / battery storage

Method used

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  • Grading constant current charging method with voltage-controlled pulse
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Embodiment

[0019] as attached figure 1 As shown, the charging is divided into three stages, and each stage is divided into two processes of constant current charging and pulse charging and discharging: the first stage constant current charging current I 1 The value is set according to the rated current of the battery electrode terminal and its connecting cable, the constant current charging current I of the second and third stages 2 , I 3 I 1 1 / 2 and 1 / 3 of 1 / 2 and 1 / 3; the charging current value of each stage charge and discharge pulse process is the same as the current value of constant current charging at this stage, that is, I 1 , I 2 and I 3 ; The discharge current of each stage charge and discharge pulse process uniformly adopts the same small current in each stage, and the value I f = 0.006I 1 .

[0020] The charging process control method of the above three stages: the first stage constant current I 1 The charging process continues until the battery voltage rises to the g...

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Abstract

The invention relates to a grading constant current charging method with voltage-controlled pulse. A section of a pulse charging and discharging process with the depolarization function is attached when storage battery voltage rises to a gassing point at each grade of constant current charging stage. Charging current amplitude of the pulse charging and discharging process is equal to constant current amplitude at the same grade, and discharging current amplitude value is 0.5-1% of first constant current amplitude. A pulsating voltage average value of a storage battery in the pulse charging and discharging process is fixed and controlled to be a litter lower than the gassing point. Compared with a traditional grading constant current charging method used by a high-capacity lead-acid storage battery at present, the grading constant current charging method has the advantages of being short in charging time, high in charging efficiency, small in battery gassing amount, small in battery damage and the like.

Description

technical field [0001] The invention relates to a graded constant current charging method, in particular to a graded constant current charging method with voltage control pulses. Background technique [0002] Large-capacity lead-acid batteries with thousands of ampere-hours or more have been using the hierarchical constant current charging method for many years, that is, the charging current is gradually reduced. The entire charging process is usually divided into 5~7 levels according to the battery model, and the final current is generally set to the first level. About 10% of the current, the criterion for the step-over control is that the battery voltage rises to the gassing point. There is a phenomenon in this traditional graded constant current charging method in practice: due to the cumulative effect of polarization, the battery voltage quickly rises to the gassing point after each grade change (reducing the charging current) and the battery voltage is reversed again, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 邢剑钱珞江王云鹤邹永铸张海艳任思敏
Owner 中国船舶重工集团公司第七〇一研究所
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