main emergency power supply is a vehicle battery, its basic function is to store electrical energy, in the case of vehicle batteries cold or broken, without any AC power supply can be started as cars, trucks, ships and other voltage 12-volt starting system. Currently cars, trucks required to provide 12-volt battery that comes with the car when the engine is started, when the car battery is not available, the car will not start, then you can replace the car comes with emergency power storage battery, start the car. The emergency power supply can now also comes with a lot of other rich features, become an emergency power source on a broader sense, for example, can give mobile phones and other electrical charge, can be used as lighting, can provide power to the laptop; with an air pump can also give tire pump; with inverter 220 may also output to other electrical power volts. The choice of products should be noted, first of all to good emergency power supply easy to maintain, or even no maintenance, long battery life, can adapt to harsh working conditions, for example, some products in a wide range of temperatures can work properly.
1. Car emergency power supply works
emergencySingle power supply with inverter technology, set charger, battery, inverter, and a controller in one.
⑴ when the mains is normal, after each vote municipal electric means to supply the critical load, at the same time mains detection and battery charging management, and then to provide DC energy to the inverter by the battery. Here, the charger 10 is equivalent to a percentage only provide battery capacity (Ah) of the charging current to the low-power direct current power source battery, it does not have the ability to provide DC power directly to the inverter.
At this time, various emergency electricity supply to the loads via the power supply system of the user of the EPS and the AC bypass switch thereof. At the same time, under the control of the logic board of the EPS, the inverter is stopped automatically turned off. Under these conditions, the user load power is actually used electricity from the grid, therefore, EPS emergency power supply is often said that the state has been working in sleep, can effectively achieve energy saving effect.
⑵ when the electricity supply mains voltage interruption or overrun (plusmn; 15 percent or plusmn; 20% of the rated input voltage), each switch device will be administered immediately cut power to the inverter, the battery pack the support provided by the DC energy, time, user load power used is converted by an inverter EPS AC power from the commercial power instead.
⑶ When the mains voltage returns to normal operation, EPS control center sends a signal to the automatic shutdown of the inverter, but also by its switch performs power supply from the inverter to the AC bypass switching operation. Thereafter, EPS to provide electricity to the load via AC bypass passage while also charging the battery pack by the charger.
2. The vehicle classification emergency power supply
Emergency lighting power supply is no longer available when the normal minimum brightness required normal lighting state, i.e., when the normal lighting supply voltage drop below 60% of rated voltage, converted to the emergency lighting supply. Emergency lighting power supply can be divided into the following types:
(1) the power grid effectively separated from the normal power supply feeder line.
(2) diesel generator.
(3) a combination of power: that of any combination of two or more and even three power supply.
(4) a battery pack: divided into the following situations:
A, light comes inside the battery, i.e. Self-contained emergency lights.
B, a centrally located battery pack.
C, a centrally located partition battery pack.
3. Note optional large ones
1) input is a dual or a single feed into electrical power.
2) the number of input phase, single-phase or three phase.
3) Total load capacity, refers to a total load capacity of EPS emergency power.
4) type of load, do lighting means, or powered by what load belt.
5) can be used long emergency backup.
6) output branch number, the number refers to the required output loop.
7) into the round mode and the position of the inlet and outlet pore size, inlet and outlet means whether there are special requirements.
8) Other requirements, means are there any requirements other than the above-mentioned requirements.
9) if required fire linkage and number of branches.