Instantaneous current control system of hybrid energy storage power supply

Abstract

The invention discloses an instantaneous current control system of a hybrid energy storage power supply, and belongs to the field of DC power supply energy storage. The control system comprises a hybrid energy storage power supply, a DC / AC inverter, a current detection module, a digital control module and a voltage detection module, wherein the current detection module is used for detecting a current of a load and sending the current to the digital control module, the voltage detection module is used for detecting port voltages of a storage battery pack and a supercapacitor bank in the hybrid energy storage power supply and sending the port voltages to the digital control module, the digital control module is used for driving the DC / AC inverter according to the port voltages of the storage battery pack and the supercapacitor bank and an instantaneous current required by the load, and the hybrid energy power supply is used for providing the instantaneous current for the DC / AC inverter. A steady-state current is output through the storage battery pack, a peak current is output through the supercapacitor, the running ranges of the port voltages of the storage battery pack and the supercapacitor bank are fully considered, and the system has the advantages of high efficiency, high controllability and longer service lifetime, and is applicable to an occasion of an impact load.

Description

technical field [0001] The invention relates to a control system of a hybrid energy storage power supply, and more specifically relates to an instantaneous current control system of a hybrid energy storage power supply, which is suitable for applications with impact loads. Background technique [0002] DC energy storage is an important technology in the application fields of new energy vehicles and mobile energy storage power stations. A single battery energy storage has the characteristics of high energy density, but it also has the problem of difficult charging and discharging of large currents; supercapacitors have high specific power, It can charge and discharge with high current, and has the advantages of fast charge and discharge reaction time and long cycle life, but its disadvantages are low specific energy and short cruising range. The hybrid energy storage power supply combined with battery pack and supercapacitor pack has the advantages of high energy density and ...

AI Technical Summary

Problems solved by technology

[0002] DC energy storage is an important technology in the application fields of new energy vehicles and mobile energy storage power stations. A single battery energy storage has the characteristics of high energy density, but it also has the problem of difficult charging and discharging of large currents; supercapacitors have high specific power, It can charge and discharge with high current, and has the advantages of fast charge and discharge reaction time and long cycle life. The disadvantage is that the specific energy is low and the cruising range is short.

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