New energy automobile storage battery electric quantity control system

Abstract

The invention provides a new energy automobile battery electric quantity control system. The system comprises a storage battery current sampling unit, an output control and sampling unit and a temperature sampling unit, wherein the storage battery current sampling unit is used for collecting current and voltage data of a storage battery, and adjusting a charging current of a charger or closing a DC / DC charger in real time through a microprocessor; the output control and sampling unit is used for controlling the working state of an automotive electrical appliance load and collecting the currentand voltage of the storage battery to electrical load equipment of the whole automobile, and the microprocessor can turn off output or reduce the power output in a PWM mode according to sampling abnormal information; and the temperature sampling unit is used for collecting real-time temperature data of the storage battery and sending the real-time temperature data to the microprocessor, and the microprocessor controls opening and closing of a cooling device according to the real-time temperature data. According to the system, the charging and normal work of the battery are ensured, the DC / DCcharger output power is reduced under the condition of guaranteeing the normal supply of the electric quantity of the storage battery, the charging time of the DC / DC charger is shortened, the reliability of the charger is improved, and the electricity lack caused by continuous discharging of the storage battery is avoided.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a battery power control system for new energy vehicles. Background technique [0002] With the development of new energy vehicle technology, the requirements for the mileage and service life of electric vehicles are getting higher and higher. In order to prolong the service life and cruising range of batteries, battery constant temperature systems are a good development trend. The battery constant temperature system consists of water cooling system, heating system, control system and circulation pipeline. When the temperature of the battery compartment is high, the water cooling system starts to work, dissipating the heat through the radiator; when the temperature of the battery compartment is low, the heating system starts to work, introducing the heat source into the battery box and heating it to a suitable temperature. Make the temperature accurate and constant betw...

AI Technical Summary

Problems solved by technology

The power of the battery has been consumed. If it is not charged for a long time, it will soon cause the battery to lose power. On the contrary, if the DC / DC charger is always in working condition, its internal circuit is in a state of high voltage and high current when it is working. High du / dt and di / dt are generated, causing strong electromagnetic interference heat, which not only affects the thermal stability of the charger itself, but also causes overcharging of the battery and affects the service life of the battery, and the charger itself also has certain power consumption

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