Temperature has a great impact on the natural aging process of UPS power batteries. Detailed experimental data shows that every 5 degrees Celsius temperature rise, battery life decreases by 10%, so the UPS should be designed to keep the battery as hot as possible. All online and backup / online hybrid UPSs generate more heat than backup or online interactive UPS during operation, which is also an important reason for the relatively long replacement cycle of backup or online interactive UPS power batteries.
The higher the battery voltage, the faster it ages. The battery is a single primary battery. Each primary battery has a voltage of about 2 volts. The primary batteries are connected in series to form a higher voltage battery. A 12 volt battery consists of 6 primary batteries and a 24 volt battery consists of 12 primary batteries. Battery composition and so on. When the UPS power battery is charged, each primary battery connected in series is charged.
The slightly different performance of primary batteries will cause some primary batteries to charge at a higher voltage than other primary batteries, which will age in advance. As long as the performance of one of the primary batteries connected in series decreases, the performance of the entire battery will also decline.
3.Battery ripple current
Ideally, in order to extend the life of the UPS power battery, the battery should always be kept in a floating or constant voltage state. In this state, the fully charged battery will absorb a small charger current, which is called floating or self-discharge current. Ripple current is generated when the battery continuously supplies power to the inverter, because according to the principle of energy conservation, the inverter must have input DC power to produce AC output. In this way, the battery forms a small charge and discharge cycle, and the frequency of the charge and discharge current is twice the output frequency of the UPS.