Views:98 Author:Site Editor Publish Time: 2019-12-10 Origin:Site
The main part of emergency starting power supply is a battery, its most basic function is to store electricity. In the case of freeze or failure of the automobile battery, the emergency starting power supply can be used as a 12V start-up system for starting cars, trucks, ships and so on without any AC power supply. At present, the cars need 12V voltage from the battery of the cars when the engine starts. When the batteries of the cars can not be used, the cars can not be started. At this time, the emergency staring power supply can be used instead of the batteries of the cars to start the cars. Today's emergency starting power supply can also have many other rich functions to become a broader sense of emergency starting power supply, such as charging mobile phones and other electrical appliances, can be used as lighting, can be used as a laptop power supply. In the selection of products, it should be noted that a good emergency starting power supply should be easy to maintain, or even not need to be maintained, and the battery life is long, which can adapt to harsh working conditions.
The emergency starting power supply adopts single inverter technology, which integrates charger, battery, inverter and controller.
When the power grid is normal, the power supply is supplied to the important load by the mutual switching device, and then the DC power supply is provided to the inverter by the battery pack. At this time, the charger is a small DC power supply which only needs to provide the battery pack with a charging current equivalent to 10% of the battery pack capacity. It does not have the ability to provide DC power supply directly to the inverter.
At this time, the power supply system composed of AC bypass and switch of EPS supplies power to all kinds of emergency loads of users. At the same time, under the control of the logic control board of EPS, the inverter stops working in the automatic shutdown state. Under these conditions, the actual power supply used by the user load is from the power grid, which can effectively achieve the effect of energy saving.
When the power supply of the power grid is interrupted or the voltage of the power grid exceeds the limit, the switching device will be immediately switched to the inverter for power supply. With the support of the DC energy provided by the battery pack, the power supply used by the user load is the AC power supply converted by the inverter of EPS, not from the power grid.
When the voltage of the power grid returns to normal operation, the control center of EPS sends out a signal to shut down the inverter automatically, and the switching operation from inverter power supply to AC bypass power supply is also performed through its conversion switch. After that, the EPS also charges the battery pack through the charger while the power grid is supplied to the load via the AC bypass power supply path.