Charging device and charging method

Abstract

The invention discloses a charging device and a charging method. The charging device comprises a high-voltage power supply system used for charging a low-voltage accumulator system and a control unit used for controlling the high-voltage power supply system to provide charging voltage for the low-voltage accumulator system according to the temperature of an environment in which the low-voltage accumulator system is positioned, wherein the high-voltage power supply system is connected with the control unit. When the temperature of the environment in which the low-voltage accumulator system is positioned is higher, the charging voltage of the low-voltage accumulator system is lowered, so that the increase value of the temperature of a battery is lowered so as to lower the side reaction of electrolyte in the battery, reduce the decomposition of the electrolyte, avoid the occurrence of swelling of the battery and enhance the safety performance of the battery; when the temperature of the environment in which the low-voltage accumulator system is positioned is lower, the charging voltage of the low-voltage accumulator system is enhanced, so that the decrease value of the temperature of the battery is lowered so as to avoid the condition of continuously lowering the temperature of the battery due to the fact that the environment is too cold in the temperature, relieve the decrease of the speed of an electrochemical reaction in the battery and enhance the utilization rate of energy; and therefore, the energy is effectively converted into electric energy.

Description

technical field [0001] The invention belongs to the field of charging low-voltage storage batteries, and in particular relates to a charging device of a battery management system and a charging method using the charging device. Background technique [0002] At present, the world's oil resources are decreasing day by day, accompanied by rising oil prices. With the progress of society, people's awareness of environmental protection is getting stronger and stronger, so it has become an urgent goal to find a kind of green energy that is less polluting and can replace petroleum. [0003] Electric vehicles use electricity as a power source, and reduce the pollution of the exhaust gas of fuel vehicles to the atmospheric environment, and also save fuel costs for drivers. As an environmentally friendly and energy-saving means of transportation, electric vehicles are increasingly recognized by the public. At present, the main electric energy storage unit of an electric vehicle is a ...

AI Technical Summary

Problems solved by technology

Usually when the ambient temperature is high, the heat accumulation generated by the low-voltage battery during the charging process will increase the temperature of the battery, increase the side reactions in the low-voltage battery, and promote the decomposition of the electrolyte, which may cause the battery to expand. The safety performance of the battery is reduced; when the ambient temperature is low, the heat generated by the low-voltage battery during charging is continuously transferred to the environment, while the electrochemical reaction in the battery is slow, the energy utilization rate is low, and the low-voltage battery is not fully charged. status

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