A new acid absorption process before capacity inspection that can improve the uniformity of valve-regulated lead-acid batteries

Abstract

The invention discloses a new process of absorbing acid before capacity inspection that can improve the uniformity of a valve-regulated lead-acid battery, which comprises the following steps: a) after completing the conversion and charging of the active material in the formation process of the valve-regulated lead-acid battery, that is, in static Start the online constant current charging and suction acid before the capacity inspection, in which the current is constant at 0.025C2A, and the acid suction completion time is 0.1~1h. b) Test the discharge capacity after standing for 2 to 5 hours; c) Check the acid absorption quality online with constant current charging after formation and charging. The constant current is 0.025C2A. Compared with the prior art, the invention can improve the uniformity of the discharge voltage among the batteries in the valve-regulated lead-acid battery pack, and effectively prolong the cycle life of the batteries.

Description

[0001] 【Technical field】 [0002] The invention relates to a new process of absorbing acid before capacity inspection that can improve the uniformity of a valve-regulated lead-acid battery, and belongs to the field of electrochemical energy. [0003] 【Background technique】 [0004] In the manufacturing process of valve-regulated lead-acid batteries, the traditional acid absorption is carried out after capacity inspection. Since sulfuric acid is also one of the active substances for the battery to complete the electrode reaction, the sulfuric acid absorbed after the capacity inspection will cause the content and density of sulfuric acid in the battery to be inconsistent with that during the capacity inspection, and the performance of the battery is based on the sulfuric acid content during the capacity inspection. The capacity data measured based on concentration and concentration are used as the basis for matching, which greatly affects the consistency of the discharge voltage ...

AI Technical Summary

Problems solved by technology

Since sulfuric acid is also one of the active substances for the battery to complete the electrode reaction, the sulfuric acid absorbed after the capacity inspection will cause the content and density of sulfuric acid in the battery to be inconsistent with that during the capacity inspection, and the performance of the battery is based on the sulfuric acid content during the capacity inspection. The capacity data measured based on concentration and concentration are used as the basis for matching, which greatly affects the consistency of the discharge voltage between the batteries in the subsequent cycle discharge process of the battery pack, and early or accelerates the occurrence of the single battery lagging behind, thus shortened battery life