Power battery charging and performance testing device containing negative voltage

Abstract

The invention provides a power battery charging and performance testing device containing negative voltage. The device comprises a first isolation transformer, a first reactor, a first AC / DC converter, a DC bus, n DC / DC bidirectional converters, the corresponding number of n duplex output switches and battery packs. The device also includes a second isolation transformer, a second reactor, a second AC / DC converter, a negative voltage supply, a negative voltage power control switch, and n negative voltage supply switches. The power battery charging and performance testing device is connected toan upper computer. Through connection modes of motion switching circuits of the above switches, switching of the negative voltage supply is changed, and switching of different charging modes is realized, so the testing device can charge or detect battery packs in a normal condition and also can charge or detect the battery packs when the battery packs do not display power or display negative voltage. The testing device is stable and reliable, is simple to operate, and can be applied to the charge / discharge and detection field of various power batteries.

Description

technical field [0001] The present invention relates to the technical field of power supply system, charge and discharge detection equipment and charge and discharge control, and in particular to detection equipment for activating and testing charge and discharge performance of power batteries with no polarity or negative polarity—power battery performance with negative pressure Testing Equipment. Background technique [0002] With the rapid development of the new energy industry and continuous breakthroughs in battery technology, various new types of batteries are also emerging. Some special batteries are quite different from conventional lithium batteries, lead-acid batteries, etc., for example, they need to be charged and discharged in a specific environment or need to be heated before they can be used. Since most of the domestic battery testing equipment is designed for conventional batteries, the testing of negative pressure batteries basically uses equipment imported ...

AI Technical Summary

Problems solved by technology

However, due to the bucK-boost circuit structure or its modified circuit structure, it is difficult to achieve 0V charging in the true sense, and it is also impossible to achieve dual-level charge / discharge (that is, both positive and negative voltages can be charged / discharged).

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