The UPS is called an uninterruptible power supply because it can quickly switch to the "inverter" state when the power is off, so that the computer in use will not lose important files due to a sudden power outage in the future. It is not used for backup power. If you just want to use electricity when the power is off, it is enough to buy the inverter. Most of the household UPS uses a maintenance-free lead-acid battery. The UPS battery is a device used by the UPS to store electrical energy. It consists of several batteries connected in series, and its capacity determines the time it takes to maintain the discharge (power supply).
Ordinary backup, online interactive or backup/ferromagnetic UPS will not have ripple current, other designs of UPS will produce ripple current of different sizes, depending on the specific design method. Just check the structure diagram of the UPS to see if the UPS can generate ripple current. If the online UPS battery is between the charger and the inverter, then the battery will have ripple current, which is a common "double conversion" UPS. If the battery is isolated from the inverter with a cut-off diode, relay, converter or rectifier, the ups battery will not have ripple current. Of course, UPSs of this design are not always "online", so this type of UPS is called a "mixed backup/online" UPS.
The battery is the most unreliable part of the UPS system, but the design of the UPS directly affects the reliability of the battery. Keeping the UPS battery charged (even if the UPS is down) can extend the battery life and avoid using a UPS with a high battery voltage. Some UPS designs can cause ripple current in the battery, causing unnecessary overheating of the battery. Most UPSs use similar batteries, but different UPS designs can significantly affect battery life.
Be sure to observe the following when installing the UPS battery:
1. Do not install the UPS battery in the sealed space or near the fire, otherwise there is a danger of explosion and fire.
2. Do not cover the UPS battery with vinyl film that may cause static electricity. Sometimes it may cause an explosion when static electricity is generated.
3. Do not install the UPS battery in places where water may enter the water. Otherwise, there is a risk of electric shock or fire.
4. Please do not install the UPS battery in the environment above -40 ° C ~ 60 ° C.
5. Do not use the battery in a place with dust, otherwise it may cause a short circuit in the UPS battery.
6. When using the battery in the box, pay attention to the air circulation.
7. Do not stick the upper cover with adhesive or label-like objects. Because there is an exhaust valve under the upper cover, the gas generated in the battery will not escape.
8. Number of parallel connections - When floating charging, the plug-in terminal battery can only be associated with up to three columns. The bolt-tight terminals are not particularly limited, but the number of parallel connections is small and the reliability is increased. In addition, when connecting in parallel, it is necessary to consider the wiring conductor and the contact resistance between the columns to be equal. In order to maintain the balance of the charge and discharge batteries in each column, do not exceed three columns in actual use.