A composite power supply and its control method

Abstract

A composite power supply. It includes a micro control unit, a battery voltage detection module, a supercapacitor voltage detection module, a DC conversion module, a current detection module, a signal amplification module, a voltage stabilization module, a supercapacitor and a battery. The micro-control unit processes the status signal according to the preset parameters, sends control instructions to the DC conversion module, adjusts the output frequency and duty cycle of the DC conversion module, and controls the output power of the supercapacitor and the output power of the battery; The starting, accelerating and climbing performance of the bicycle. Avoid high-current charging and discharging of the battery alone, reduce damage to the battery, and increase the service life of the battery. A method for controlling the output power of a composite power supply of the present invention is provided, and the composite power supply is controlled to provide electric power for high-speed and long-term driving of an electric bicycle.

Description

technical field [0001] The invention relates to a power supply device and a control method thereof, in particular to a compound power supply for an electric bicycle and a control method thereof. Background technique [0002] With the development of battery technology, colloidal lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries have emerged. Compared with lead-acid batteries, these types of batteries have better performance, less pollution to the environment, and avoid secondary pollution. However, due to its stable performance, high quality and low price, lead-acid batteries will occupy the majority market share for a long time in the future. For example, in the domestic electric bicycle market, lead-acid batteries are basically used as energy sources for power supply. [0003] The plate of the battery is composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid, which will cause great pollution to the environme...

AI Technical Summary

Problems solved by technology

[0003] The plate of the battery is composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid, which will cause great pollution to the environment during the manufacturing process and the disposal of waste batteries

The battery storage process is a chemical reaction process, restricted by its production materials and production process, there are problems such as poor cycle life, poor high and low temperature performance, sensitive charging and discharging process, difficult recovery of deep discharge performance and capacity, and environmental pollution. question

Usually, the energy density as an energy storage index is about 40Wh / kg, and the power density as an energy conversion index is generally only tens to hundreds of watts / kg, which is relatively low. When a large current is required, the current output power is low, and the output power of the motor is insufficient, which often causes deep discharge of the battery during use, reduces power, and shortens the service life

Traditional batteries are increasingly unable to meet people's requirements for energy storage systems

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