Charging and discharging control method and device for automobile electronic double layer super-capacitor

Abstract

The invention provides a charging and discharging control method and device for an automobile electronic double layer super-capacitor. The control method comprises the steps of 1, obtaining voltage and temperature information of the electronic double layer capacitor (EDLC); 2, judging whether the EDLC continues to be used or is stored for a long time, executing the step 3 if the EDLC is stored for a long time, and executing the step 4 if the EDLC continues to be used; 3, controlling the EDLC to be stored with voltage not larger than the storage voltage; 4, according to a vehicle control unit charging and discharging instruction, determining whether automobile starting discharging or automobile load discharging is performed when the EDLC needs to be discharged, and determining whether constant voltage charging or low current pre-charging or high current rapid charging is performed when the EDLC needs to be charged. The using efficiency of the EDLC can be improved on the premise that the service life of the EDLC is ensured.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a charging and discharging control method and device for electric double layer supercapacitors used in automobiles. Background technique [0002] EDLC (Electric Double Layer Capacitor), an electric double layer supercapacitor, is currently mainly used in the recovery of vehicle braking energy, energy recovery of cranes and other machinery, solar power generation, and UPS emergency power supply. [0003] In the recovery of vehicle braking energy, the requirement for EDLC is to convert as much energy as possible from the braking of the vehicle or the falling of heavy objects into electrical energy, store it in the capacitor, and release the electrical energy in the capacitor when electricity is needed. Other loads are powered, so as to achieve the purpose of energy recovery, energy saving and emission reduction. Because EDLC has low energy density and high power density, in or...

AI Technical Summary

Problems solved by technology

[0005] The life of EDLC is greatly affected by the temperature. Every time the temperature rises by 10°C, the life of EDLC will be halved, and EDLC cannot work beyond the temperature limit.

When the EDLC is charged and discharged rapidly and frequently, it is easy to cause a rapid rise in its internal temperature, thereby affecting its service life.

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