Lithium battery charging and discharging circuit

Abstract

The invention relates to the technical field of lithium batteries, and discloses a lithium battery charging and discharging circuit. The circuit comprises a controller, a charging control module, a charging and discharging switching module, a voltage monitoring module, a current monitoring module, a temperature monitoring module, a switch tube control module, a lithium battery pack and a battery equalization module, wherein the controller is connected with the charging control module, the charging and discharging switching module, the voltage monitoring module, the current monitoring module, the temperature monitoring module and the switch tube control module respectively; the lithium battery pack is connected with the charging and discharging switching module, the voltage monitoring module, the current monitoring module, the temperature monitoring module, the switch tube control module and the battery equalization module respectively. The circuit realizes nondestructive equalization charging and discharging management through the battery equalization module and the voltage, current and temperature monitoring modules, realizes monitoring of temperature, current and voltage, is goodin equalization effect, simple in system structure and convenient in maintenance and expansion, saves energy, and is relatively high in equalization efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery charging and discharging circuit. Background technique [0002] At present, lithium battery packs have been widely used due to their superior performance. Since there are certain differences between individual batteries, this difference will cause damage to individual batteries due to overcharging or overdischarging during charging and discharging, which will lead to rapid damage to the entire lithium battery pack. The energy balance of the single cells in the battery pack is carried out, thereby prolonging the service life of the battery pack. [0003] In the prior art, there are many methods for balancing the charging and discharging energy of series-connected battery packs, but all of them have their own shortcomings, such as: [0004] 1. The inductance is used as the energy storage element to achieve lossless balance, and the energy transfer ef...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a lithium battery charge and discharge circuit, which solves the technical problems of low energy efficiency, low safety, inconvenient expansion, and the need for more transformers in the prior art for energy balance of charge and discharge.

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