Battery formation detecting system and absorption and protection circuit parameter selection method thereof

Abstract

The invention provides a battery formation detecting system. The battery formation detecting system comprises a comparison circuit, a sampling device, an insulated gate bipolar transistor (IGBT) module and a pulse width modulation digital processing unit. The IGBT module comprises an IGBT arranged on an upper bridge arm, an IGBT arranged on a lower bridge arm and two absorption and protection circuits. A source electrode of the IGBT arranged on the upper bridge arm is connected with a drain electrode of the IGBT arranged on the lower bridge arm, and grid electrodes of two IGBTs are connected with the pulse width modulation digital processing unit. Each absorption and protection circuit comprises a buffer capacitor, a fast recovery diode and an absorbing resistor. The invention further provides a parameter optimization selection method of the absorption and protection circuits in the battery formation detecting system through parallel self-correcting and multiple target genetic algorithm. According to the battery formation detecting system and the protection circuit parameter selection method thereof, a major loop is small in inductance, and transient voltage can be controlled well.

Description

technical field [0001] The invention relates to a system for detection of formation of batteries, especially a system for detection of formation of large-capacity batteries (including battery packs), and a method for optimizing parameters of absorption protection circuits in the system. Background technique [0002] With the continuous improvement of people's awareness of environmental protection and the depletion of oil and gas resources in the world, electric vehicles, as a new energy vehicle, have become a hot spot for research and development by countries all over the world in recent years. At present, the research and development of ultra-high-capacity lithium-ion automotive power batteries is still in the laboratory research stage. Most of the batteries used as the power source of electric vehicles are connected in series and parallel. Good consistency, which also makes the detection of power battery performance very important in the production process. [0003] Forma...

AI Technical Summary

Problems solved by technology

[0013] In order to solve the technical problems of low detection accuracy and poor system reliability of the existing battery formation detection system, the present invention provides a battery formation detection system, including a comparison circuit and a sampling device. The input terminal is connected; it also includes an IGBT module and a pulse width modulation digital processor, the input terminal of the pulse width modulation digital processor is connected to the output terminal of the comparison circuit; the input terminal of the IGBT module is connected to a switching power supply, and its output Terminating the battery, the control terminal of which is connected to the PWM digital processor;

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