Matching method and device for lead-acid storage batteries

Abstract

The invention discloses a matching method for lead-acid storage batteries. The matching method comprises the following steps: carrying out vacuum acid adding on assembled single batteries, and carrying out charging inner formation on the single batteries in a water tank frame; discharging the single batteries which have been subjected to inner formation, and measuring final voltage of the single batteries; carrying out constant-voltage charging on the single batteries, and measuring charging voltage of the single batteries when charging current reaches a preset current value; after leaving the charged single batteries standstill for a preset time interval, measuring open-circuit voltage of the single batteries; and matching the batteries according to the final voltage, the charging voltage and the open-circuit voltage of the single batteries. In addition, the invention further discloses a matching device for the lead-acid storage batteries. By the matching method and device for the lead-acid storage batteries, the service life of a battery pack is prolonged.

Description

technical field [0001] The invention relates to a battery matching method, in particular to a lead-acid storage battery matching method and a matching device. Background technique [0002] At present, the grouping method of lead-acid batteries is based on the discharge voltage of the battery (20 12V batteries) to the discharge voltage of the 214V scale, and the static voltage after standing for 24 hours according to the process requirements of the two. The process of grouping pays more attention to the capacity of the battery, but not enough attention to the voltage of the single battery itself. Therefore, the battery capacity of the assembled battery pack is almost the same. However, during the user's use, because the entire battery pack (including multiple batteries) is charged with constant voltage and current limitation during the charging process, and because the battery voltage is between the batteries when they are charged in series. There are differences, so high-vo...

AI Technical Summary

Problems solved by technology

The process of grouping pays more attention to the capacity of the battery, but not enough attention to the voltage of the single battery itself

Therefore, the battery capacity of the assembled battery pack is almost the same. However, during the user's use, because the entire battery pack (including multiple batteries) is charged with constant voltage and current limitation during the charging process, and because the battery voltage is between the batteries when they are charged in series. There are differences, so high-voltage batteries are prone to overcharging, which will lead to more serious water loss, higher acid concentration, larger capacity, and faster capacity decay; low-voltage batteries are prone to not being fully charged. , resulting in severe sulfation of the plate, larger particles, and lower discharge capacity

As a result, the differences between the batteries in the battery pack are increased. Low-voltage batteries appear to be undercharged, and large particles of sulfuric acid appear on the plates. As the cycle progresses, a single battery will gradually fall behind and the capacity will decrease.

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