Lithium ion battery short-circuit heating system

Abstract

The invention discloses a lithium ion battery short-circuit heating system. The lithium ion battery short-circuit heating system comprises a discharge power unit and a discharge control unit, wherein the discharge power unit comprises a power component, a discharge resistor and a battery pack module; the discharge control unit comprises a temperature sensor, a current sensor, a controller and a power supply module. The lithium ion battery short-circuit heating system is simple in structure and reasonable in design; the temperature sensor is used for detecting the ambient environment temperature of the lithium battery; the current sensor is used for detecting the current value of amplification current of the output end of the power component; the controller is used for controlling the power component in real time, so that the temperature control accuracy in the battery is improved; the heating response time of the battery is reduced; the operation performance of electric automobiles in the low-temperature environment is improved; the service life of the lithium battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a lithium-ion battery short-circuit heating system. Background technique [0002] An electric vehicle is a vehicle that uses an on-board energy storage battery to convert electrical energy into mechanical energy through an electric motor. The energy storage battery materials used in electric vehicles currently on the market are generally lithium batteries. Considering that the car needs to drive under complex road conditions and environmental conditions, or some electronic equipment needs to be used in poor environmental conditions, the battery used as the power supply of electric vehicles or electronic equipment needs to adapt to these complex conditions, especially when electric When the vehicle or electronic equipment is in a low-temperature environment, the battery needs to have excellent low-temperature charge and discharge performance and high output and input po...

AI Technical Summary

Problems solved by technology

At present, there are two auxiliary heating methods used when the battery is low temperature: one is to use the industrial power supply as the heater to provide electric energy for the lithium battery for heating; the other is to use the vehicle power supply of the electric vehicle as the heater to provide the lithium battery Electric energy is used for heating. Although this method can heat the battery when the battery is charging and discharging, it will cause the problem of shortening the mileage of the vehicle.

These two heating methods have the problems of long heating time and inconvenient control of heating temperature

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