How is the battery activation device configured?
发布时间：2022-03-15
Before leaving the factory and being put into service, batteries must undergo an activation test. The data obtained serve as an important reference for assessing battery performance; therefore, a battery activation tester is required. Prior to use, the device must be configured with appropriate parameters—only when these settings are properly adjusted can accurate test results be achieved. This article provides a brief overview of how to configure a battery activation tester. During testing, the accuracy of the experimental data depends critically on the pre‑test parameter settings; thus, electrical technicians should tailor these settings to the specific characteristics of the battery under test in order to obtain reliable results.
Theoretical analysis demonstrates that the terminal voltage of a VRLA battery is unrelated to its discharge capacity. During operation, as service time accumulates, individual cells or localized cell groups within a VRLA battery pack inevitably experience increasing internal resistance and progressive aging. According to theory, the overall capacity of the battery pack is determined by the lowest‑performing cell, rather than by the average or rated (initial) capacity. When a cell’s actual capacity drops below 90% of its rated capacity, it enters a degradation phase; and when the capacity falls below 80% of its original value, the cell undergoes rapid deterioration. This degradation phase is brief, and since battery packs are typically connected in series, a single faulty cell can render the entire pack inoperable, posing a significant safety hazard.
The operating and managing entities often focus solely on the localized maintenance and management of standby power equipment, overlooking the critical role of the battery pack—unaware that the risk of a power outage is, to a large extent, concealed within the battery pack itself. The charging behavior of an entire battery pack is such that, if one or several cells within the pack have increased internal resistance due to aging, their capacity will inevitably decline. When the charger attempts to charge the pack, these aged cells, having lower capacity, will reach full charge much more quickly. The charger will then mistakenly conclude that the entire pack is fully charged and switch to float‑charge mode, maintaining a constant voltage with a small current. Meanwhile, the other healthy cells cannot be fully charged. As a result, the pack’s charge‑discharge cycles are governed by the capacity of the weakest, aged cells. Through repeated cycles of float‑charge, discharge, equalization, discharge, and float‑charge—a vicious spiral—the overall capacity continues to degrade, leading to a progressively shorter backup runtime.
2024/06/29
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