Supercapacitor backup power supply for main control board

Abstract

The invention relates to a supercapacitor backup power supply for charging pile plate electrode products in order to improve the stability and reliability of a charging pile main control board. The supercapacitor backup power supply is mainly composed of a supercapacitor, a boost chip, a switching device and the like. The whole design comprises a power supply circuit, a charging and discharging circuit, a boost circuit and a state monitoring circuit, wherein the power supply circuit comes from a charging pile plate electrode product and is the source of the supercapacitor, the charging and discharging circuit controls the charging and discharging of the supercapacitor, the boost circuit boosts the voltage of the supercapacitor to the voltage required by the plate electrode product, and thestate monitoring circuit controls the access of a power supply and the output of the whole power supply.

Description

technical field [0001] The invention relates to a supercapacitor backup power supply of a main control board, belonging to the technical field of backup power supplies. Background technique [0002] Traditional lithium batteries are used as backup power for circuit boards, not only have poor performance in low temperature environments, but also have short service life and slow charging speed, while traditional capacitors have disadvantages such as low energy density and fewer charge and discharge times. In previous designs, the backup power took up a large area of ​​the printed circuit board, and the high-cost power management chip also limited the application of the backup power in cost-sensitive products. [0003] It is very necessary to use emergency power supply for the key components of the motherboard, and the emergency power supply requires small size / light weight, large capacity and excellent performance. The emergency power supply has been developed through nickel-...

AI Technical Summary

Problems solved by technology

The emergency power supply has undergone the development of nickel-cadmium batteries, nickel-hydrogen batteries and lithium batteries. Using traditional batteries as backup power for circuit boards not only has poor performance in low temperature environments, but also has a short service life and slow charging speed.

However, traditional capacitors have disadvantages such as low energy density and less charge and discharge times.

In previous designs, the backup power took up a large area of ​​printed circuit boards, and the high-cost power management chip also limited the application of backup power in cost-sensitive products

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