Review of on-line monitoring and health assessment techniques for valve-controlled sealed lead-acid batteries

Abstract

Because of their low cost, high stability, less explosive nature, and mature regeneration technology, valve regulated sealed lead-acid batteries are widely used; however, they have drawbacks such as a short life span, more defects, and more frequent failures. As a result, online monitoring and health assessment of lead-acid batteries are critical to their long-term operation. This paper investigates the failure mechanism of lead-acid batteries and its impact on battery performance, the online monitoring indexes and calculation methods of lead-acid batteries, the online monitoring technology of lead-acid batteries based on substations, communication rooms, and distribution terminals, and the construction of a topology diagram of the battery online monitoring system. Then, from the standpoint of health assessment technology, existing health assessment methods based on both single and multiple variables are examined.