Composite power source based on charge pump and switching method thereof under different work conditions

Abstract

The invention discloses a composite power source based on a charge pump and a switching method thereof under different work conditions, and belongs to the field of new energy automobiles. The composite power source comprises a composite power source management system, a switch controller, the charge pump, a sampling device and a power battery, wherein the charge pump is composed of a super-capacitor and a switch module, the output voltage can be changed according to different work condition requirements, operation is simple, only a few elements are needed, and electromagnetic interference (EMI) can be lowered. The composite power source management system is connected with the switch controller through a CAN bus, so that the super-capacitor is connected in parallel or in series. The charge pump is connected with the power battery in parallel, the super-capacitor can assist the power battery in the power output and energy recycling functions, the workload of the power battery is reduced, and the service life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to a composite power supply based on a charge pump and a switching method thereof under different working conditions. Background technique [0002] At present, the development of new energy vehicles with batteries as the power source is an effective way to alleviate the problems of energy shortage and environmental pollution, but the battery as a power source has its limitations, which restricts the development of pure electric vehicles. As a new type of energy storage element, supercapacitor has high power density and long cycle life compared with batteries; compared with ordinary electrostatic capacitors, it has high energy density; at the same time, supercapacitors have high current charging and discharging characteristics, which can realize Instantaneous large current output, high charge and discharge efficiency and other performances have been widely used in new e...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large volume, high cost, low energy conversion efficiency and high complexity of the inductive DC / DC converter in the composite power supply system of the prior art, the present invention provides a composite power supply based on a charge pump and its application in different industries. It is not only applicable to the field of electric vehicles, but also applicable to various high-voltage and high-power equipment

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