Device for improving transient power of low-temperature starting of vehicle and power supply system

Abstract

The invention discloses a device for improving transient power of low-temperature starting of a vehicle, and the device comprises a DC / DC, a super capacitor, a state detection module and a control module, and is characterized in that one end of the DC / DC is connected with an external storage battery, and the other end of the DC / DC is connected with the super capacitor; the super capacitor is usedfor storing electric energy; the state detection module is used for collecting signals required by the control module and providing an external communication interface for software upgrading and receiving control of external equipment; the control module receives signals of the state detection module and controls the super capacitor and the DC / DC, and the control of the super capacitor comprises control of charging and discharging time, charging and discharging current and charging and discharging voltage. The reliability of the system can be greatly improved, and continuous upgrading and improvement are facilitated.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a device and a power supply system for increasing the transient power of a vehicle at low temperature starting. Background technique [0002] Existing vehicles use storage batteries as starting power sources. According to data, because the battery is affected by the ambient temperature, the capacity will decrease by 1% for every 1 degree Celsius decrease. In order to solve the problem of starting the vehicle under low temperature conditions, the existing technology is to use the super capacitor, which has better low temperature and discharge performance than the battery, and add the super capacitor as the starting power supply. [0003] The main technical solutions of the prior art using supercapacitors are as follows: figure 1 As shown, the battery charges the supercapacitor directly or through DC / DC, and the supercapacitor discharges to the load when starting; the role of ...

AI Technical Summary

Problems solved by technology

[0005] One: The reliability is reduced, and the switch or diode is damaged arbitrarily, which makes the whole vehicle unable to start;

[0006] Two: the cost increases, diodes and switches are high-power devices, and the cost is high;

[0007] Three: Increased volume, high-power devices require more heat dissipation space, resulting in increased volume

[0008] 4. Directly charging the supercapacitor with the battery will cause the power of the supercapacitor to be directly affected by the state of the battery, affecting the energy storage efficiency and charge and discharge current of the supercapacitor

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