Lead-acid battery charger controller capable of reducing charging coefficient and control method thereof
A lead-acid battery and charging coefficient technology, applied in battery circuit devices, energy-saving charging equipment, collectors, etc., can solve problems such as charging voltage differences, battery undercharging or overcharging, and misjudgment at the end of charging, and achieve improved Charging efficiency, reducing the charging coefficient, and the effect of fast charging
Active Publication Date: 2014-08-20
ECU ELECTRONICS INDAL
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Problems solved by technology
[0004] Under the U_I curve, the determination of the constant voltage point directly determines the charging state of the battery. However, due to the consistency of the battery and the performance of the old and new batteries, the required charging voltage will have a large difference, resulting in the battery being in a light state. degree of undercharging or overcharging
The segmented WA curve changes the output current of the charger in stages according to the voltage of the battery, which relatively reduces the influence caused by the difference in the constant voltage point, but the segmented current setting changes when the output current setting changes. It will lead to changes in the terminal voltage of the battery, which may easily lead to misjudgment of the end of charging
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[0020] A lead-acid battery charger controller capable of reducing the charging coefficient, including an isolated sampling module 1 for collecting DC output voltage and DC output current, the output terminal of which is connected by an A / D converter 2 and a logic function control module 3 The input terminals are connected, the output terminal of the logic function control module 3 is connected with the input terminal of the charging curve control module 4 , and the output terminal of the charging curve control module 4 is connected with the D / A converter 5 . It also includes a timer 6, the output terminal of the timer 6 is connected to the input terminal of the A / D converter 2; the isolated sampling module 1 is composed of a DC voltage sampling circuit and a DC current sampling circuit. like figure 1 shown. Timer 6 generates a 100-millisecond interrupt, which provides a time reference for the control system, and completes tasks such as analog-to-digital conversion, logic func...
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The invention relates to a lead-acid battery charger controller capable of reducing a charging coefficient. The controller comprises an isolation sampling module used for acquiring DC output voltage and DC output current, wherein the output end of the isolation sampling module is connected with the input end of a logic function control module through an A / D converter, the output end of the logic function control module is connected with the input end of a charging curve control module; and the output end of the charging curve control module is connected with a D / A converter. The invention also discloses a control method of the controller. According to the invention, voltage and current are output as a WA curve, the characteristics of both a motor and a battery are fully utilized to reliably and quickly carry out charging. Moreover, as for the charging completion judgment, a plurality of judgment combinations are adopted to carry out reliable judgment so as to ensure that the battery is fully charged, but not overcharged and charged insufficiently; and the charging coefficient is remarkably reduced, and the charging efficiency is improved.
Description
technical field [0001] The invention relates to a controller, in particular to a lead-acid battery charger controller capable of reducing the charging coefficient and a control method thereof. Background technique [0002] In recent years, the new energy industry represented by the new energy automobile industry has attracted enough attention and has achieved considerable development. The charging process of new energy vehicles involves the conversion of energy. The concept of charging coefficient is proposed. The charging coefficient is equal to the ratio of the input energy of the charger to the output energy of the battery. According to the law of energy conservation, the charging coefficient is greater than or equal to 1. The charging coefficient intuitively reflects the proportion of energy loss in a complete charging and discharging cycle, and the smaller the charging coefficient, the smaller the energy loss during the conversion process. [0003] Since the output pow...
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IPC IPC(8): H02J7/00
CPCY02E70/40Y02E60/10
Inventor 陈滋健王雪飞程益德曹明秀
Owner ECU ELECTRONICS INDAL