Compound active equalization circuit based on FPGA architecture

Abstract

The invention discloses a compound active equalization circuit based on an FPGA architecture, comprising a battery pack, a battery information acquisition circuit, an equalization circuit, and an FPGA module. The output end of the battery pack is connected with the input end of the battery information acquisition circuit. The output end of the battery information acquisition circuit is connected with the input end of the equalization circuit through the FPGA module. The output end of the equalization circuit is connected with the input end of the battery pack. Compared with the prior art, as the compound equalization circuit is composed of a DC-DC equalization active circuit and a PWM control converter active circuit based on an FPGA architecture, the energy efficiency of batteries is improved, and the hardware cost is reduced greatly. Compared with a passive equalization method, an active equalization method avoids the waste of energy obviously, and avoids heat produced in the process of passive equalization (discharge). Thus, the safety of the system is improved.

Description

technical field [0001] The invention relates to an equalizing circuit, in particular to a composite active equalizing circuit based on FPGA architecture. Background technique [0002] Equalization control is one of the key technologies of the battery management system. It is based on the accurate measurement of battery voltage, current, temperature and other parameters. The remaining power is balanced. Most battery applications require a higher voltage than a single battery or a series of batteries, so it is often a combination of multiple cells and multiple battery packs during use. The imbalance between cells is very common in the battery pack system. If there is no equalization technology, it will lead to overcharging, undercharging or even overdischarging of the cells, which will greatly shorten the battery life. Therefore, balance is particularly important for lithium battery systems. [0003] The current mainstream solutions for battery equalization circuit design i...

AI Technical Summary

Problems solved by technology

[0005] 2. Active equalization circuit design based on Freescale chip: Build a hardware circuit through a single-chip microcomputer or embedded system similar to Freescale chip, write a certain program for the chip to control this hardware circuit to control the equalization, but the hardware cost is high and the work efficiency is low

The system is too dependent on hardware circuit implementation, and hardware circuits are easily copied

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