Bidirectional power supply control system and method with wide voltage range

Abstract

The invention provides a bidirectional power supply control system and method with a wide voltage range in the technical field of power control. The system comprises an AC power distribution module; an AC-DC converter which is connected with the AC power distribution module; an energy bidirectional conversion module which is connected with the AC-DC converter; and an upper computer which is connected with the energy bidirectional conversion module. The energy bidirectional conversion module comprises a first DC-DC converter which is connected with an AC-DC converter; a second DC-DC converter which is connected with the AC-DC converter; a current sensor which is connected with the first DC-DC converter; a power output unit which is connected with the current sensor and the second DC-DC converter; a voltage sensor which is connected in parallel to two ends of the power output unit and the load; a temperature sensor; a signal processing unit which is connected with the current sensor, the voltage sensor and the temperature sensor; and a DSP chip which is connected with the first DC-DC converter, the second DC-DC converter, the signal processing unit and the upper computer. The power supply control system has the advantages that the voltage change range and the operation stability of the power supply control system are greatly improved.

Description

technical field [0001] The invention relates to the technical field of power control, in particular to a bidirectional power supply control system and method with a wide voltage range. Background technique [0002] With the rapid development of society, people's living standards continue to improve, and people's demand for energy is increasing. In the structural changes in the development and utilization of new energy, insisting on energy conservation and consumption reduction will become the focus of energy development, making energy flow in two directions Type conversion equipment can be widely used and promoted. With the continuous development and innovation of battery materials, the energy density and charge-discharge cycle performance of batteries have been greatly improved. The power battery, one of the core components of new energy vehicles, is developing rapidly with the rise of the new energy industry, further promoting the energy bidirectional The development and ...

AI Technical Summary

Problems solved by technology

[0005] 1. The battery pack generated by the battery manufacturer may need to deal with application scenarios such as a single battery string for mobile phones, several strings of batteries for tablet computers, dozens of strings of batteries for electric tools, and dozens of strings of batteries for electric vehicles. The nominal voltage of the battery pack ranges from 3.6V to 400V, or even higher; the conversion output voltage range of traditional energy bidirectional flow conversion equipment is narrow, and even can only output a fixed voltage, and the application scenario is single. The needs of testing and maintenance often require a variety of testing equipment or integrated large-scale testing equipment to test battery packs of different voltages, which is very inconvenient to use and is not conducive to debugging and production

[0006] 2. Directly use relays or MOS tubes to output power. The mechanical jitter generated during the on-off process of the relays will impact the circuit. Closing the relays with load may also cause damage to the relays, seriously affecting the service life; when using MOS tubes for output power, Complete electrical isolation cannot be achieved, which will cause unnecessary interference to other related circuits

Images