The effect of charging voltage on the service life of UPS battery

The battery charger is a very important part of the UPS, the charging conditions of the battery have a big impact on the battery life. UPS battery life is maximized if the battery is kept under constant voltage or "floating" electrical charge. In fact, the life of the battery state of charge is much longer than that of the pure storage state. Because battery charging slows the natural aging process of the battery, the UPS should keep the battery charged whether it is running or shutting down.

The battery is composed of a single "primary battery", and the voltage of each primary battery is about 2 volts. The primary batteries are connected in series to form a battery with a higher voltage. A 12-volt battery consists of 6 primary cells, and a 24-volt battery consists of 12 volts. A primary battery composition and so on. When the battery of the UPS is charged, each primary battery connected in series is charged. The slightly different performance of the primary battery will cause some primary batteries to have a higher charging voltage than other primary batteries, and this part of the battery will age ahead of time. As long as the performance of a certain primary battery connected in series decreases, the performance of the entire battery will also decrease. Tests have shown that battery life is related to the number of primary batteries connected in series, the higher the battery voltage, the faster the aging. When the UPS capacity is fixed, the battery voltage should be as low as possible in the design, so that the battery life of the UPS will be longer. When the battery voltage is constant, a small number of primary batteries with a high voltage should be selected in series, and a large number of primary batteries with a low voltage should not be selected. Batteries in series. The battery voltage of some manufacturers' UPS is relatively high. This is because when the capacity is constant, the higher the voltage, the smaller the current. Thinner wires and semiconductors with less power can be selected, thereby reducing the cost of UPS. The battery voltage of a UPS with a capacity of about 1KVA is generally 24 to 96V.