Charging method for prolonging service life of lead-acid storage battery

A technology of lead-acid battery and charging method, which is applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., can solve problems such as potential safety hazards, high charging voltage, long charging time, etc., to prevent Gas evolution reaction, improve cycle life, and ensure the effect of charging capacity

Pending Publication Date: 2021-03-12
ZHEJIANG NARADA POWER SOURCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method of charging, although the charging capacity can be properly supplemented, the charging current is small, the charging time is long, and it generally takes more than ten hours to fully charge; and the charging efficiency is low, the charging voltage is high, the overcharge is serious, and the "thermal runaway" battery Many, with serious security risks

Method used

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  • Charging method for prolonging service life of lead-acid storage battery
  • Charging method for prolonging service life of lead-acid storage battery
  • Charging method for prolonging service life of lead-acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 uses a battery with a capacity of 20Ah and a voltage of 12V.

[0054] The first constant current charging step S11: Charge to 13.5V / piece with 20A, and the charging time is 30min;

[0055] The second constant current charging step S12: Charge to 14.1V / piece with 15A, and the charging time is 20min; and

[0056] The third constant current charging step S13: continue to reduce the charging current, and charge it to 14.7V / piece with 6A;

[0057] Constant voltage charging stage S2: In the third constant current charging step, the charging voltage reaches 14.7V / piece and then constant voltage charging, the charging time of the third constant current charging step and the constant voltage charging stage is 130min, and the transfer condition is 0.5A;

[0058] Float charge stage S3: limited current 0.2A, 13.8V / float charge only for 3h, carried out after 10 cycles of the constant current charge stage and the constant voltage charge stage.

[0059] The charging vol...

Embodiment 2 Embodiment 3

[0062] What embodiment 2 to embodiment 3 adopt is the battery of capacity 20Ah voltage 12V.

[0063] The method steps in Embodiment 2 to Embodiment 3 are exactly the same as those in Embodiment 1, and only the parameters are different. The different parameters are shown in Table 1, and will not be repeated here.

[0064] Embodiment one to embodiment three and comparative example one, comparative example two cycle test graphs see Figure 4 .

[0065] Embodiment four to embodiment six

[0066] Embodiment 4 to Embodiment 6 are charging curve systems for batteries with a corresponding capacity of 12Ah and a voltage of 12V. The method steps are completely consistent with the method steps in Embodiment 1. Only the parameters are different. The different parameters are shown in Table 1, and will not be repeated here. repeat. According to this method of charging, the cycle life is more than 560 times;

[0067] Embodiment seven to embodiment nine

[0068] Embodiment 7 to Embodimen...

Embodiment 10 Embodiment 15

[0070] Embodiment 10 to Embodiment 15 are 3 batteries corresponding to capacity 12A, 20Ah, 200Ah and voltage 12V to form a 36V battery pack and 5 batteries corresponding to capacity 12A, 20Ah and 200Ah and voltage 12V to form a 60V battery pack. The steps of the method are exactly the same as the steps of the method in Embodiment 1, only the parameters are different, and the different parameters are shown in Table 1, and will not be repeated here. According to this method of charging, the cycle life is more than 540 times.

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Abstract

The invention provides a charging method for prolonging the service life of a lead-acid storage battery. The charging method is characterized by comprising a constant-current charging stage, a constant-voltage charging stage and a floating charging stage. The constant-current charging stage comprises multiple sections of constant-current charging steps, each section of constant-current charging step has a voltage threshold and a charging current value, and the charging current value of each section of constant-current charging step is decreased progressively in sequence, wherein the voltage threshold of the last section of constant-current charging step is a final voltage threshold, and except the final voltage threshold, each of the other voltage thresholds is smaller than the gassing potential of the lead-acid storage battery. The constant-voltage charging stage carries out constant-voltage charging with the final voltage threshold value, and the floating charging stage is carried out after the constant-current charging stage and the constant-voltage charging stage are circulated for one or more times.

Description

technical field [0001] The invention relates to the technical field of accumulators, in particular to a charging method for improving the service life of lead-acid accumulators. Background technique [0002] At present, the number of deep cycles (full charge and discharge) of lead-acid batteries of electric vehicles on the market is generally about 100-350 times. The charging method of the existing lead-acid battery is a three-stage charging method. The first stage is charging with a small current and constant current at the beginning of charging, and the second stage is constant voltage charging. When the current decays to a predetermined value, it will be converted from the second stage. The third stage is the float charging stage. Using this method of charging, although the charging capacity can be properly supplemented, the charging current is small, the charging time is long, and it generally takes more than ten hours to fully charge; and the charging efficiency is low...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCH01M10/44H01M10/446Y02E60/10
Inventor 苑景春陈加成张育红韩振丁平陈冬
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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