Emergency power supply device based on direct current low-voltage protection and control circuit

Abstract

The present invention discloses an emergency power supply device based on a direct current low-voltage protection and control circuit. The device comprises an energy storage battery pack and a DC / AC converter connected with the energy storage battery pack, and the output end of the DC / AC converter is electrically connected with an alternating current charge socket; the energy storage battery packcomprises a plurality of power batteries with attenuation rates larger than 80% for an electric car, and a power battery socket having a plurality of parallel connection ends, the power batteries areplugged on the parallel connection ends in a pluggable mode; a first moulded case circuit breaker is connected between the DC / AC converter and the alternating current charge socket, a control end of ashunt release of the first moulded case circuit breaker is connected with the output end of the DC / AC converter through a normally open controlled end of a direct current undervoltage relay; and thecontrol end of the direct current undervoltage relay is connected with the parallel connection ends. The emergency power supply device based on the direct current low-voltage protection and control circuit is high in the recovery utilization rate of retired power batteries, low in cost and good in protection effect on power battery and facilitates prolonging of the service life of the power batteries.

Description

technical field [0001] The invention relates to the technical field of mobile power supply, in particular to an emergency power supply device based on a DC low voltage protection control loop. Background technique [0002] In response to global warming and environmental pollution, electric vehicles are gradually replacing traditional fuel vehicles, and the number of electric vehicles in my country continues to rise sharply. However, as the service life of electric vehicles increases, the attenuation rate of power batteries is getting higher and higher. When the power battery capacity decays below 80%, it is not easy to be used as a power battery for electric vehicles. At present, the power batteries of electric vehicles are mainly dismantled and recycled. However, dismantling and recycling greatly reduces the residual value of power batteries, and the cost of recycling is high. [0003] On the other hand, since the field construction work is far away from the power point, di...

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Problems solved by technology

[0002] In response to global warming and environmental pollution, electric vehicles are gradually replacing traditional fuel vehicles, and the number of electric vehicles in my country continues to rise sharply. However, as the service life of electric vehicles increases, the attenuation rate of power batteries is getting higher and higher. When the power battery capacity decays below 80%, it is not easy to be used as a power battery for electric vehicles

At present, the power battery of electric vehicles is mainly dismantled and recycled. However, dismantling and recycling greatly reduces the residual value of the power battery, and the cost of recycling is high.

[0003] On the other hand, since the field construction work is far away from the power point, diesel generators are usually used for power generation, which is difficult to carry, fuel storage is risky, and diesel generators cause great environmental pollution.

In addition, many low-voltage users, including restaurants and commercial areas, will purchase diesel generators as emergency power sources to deal with the risk of power outages. In practice, the utilization rate of this part of emergency power sources is not high, resulting in waste of resources and increased costs.

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