Multi-path lithium battery formation power supply parallel operation device and design method thereof

Abstract

The invention relates to a multi-path lithium battery formation power supply parallel operation device and a design method thereof. The device comprises a DC power supply DC, a high-precision galvanometer and a plurality of lithium battery formation power supply modules arranged in parallel, wherein each lithium battery formation power supply module comprises a switching circuit, a crystal oscillator, a branch galvanometer and a DSP controller, the switching circuit is connected with the DC power supply DC, one end of the branch galvanometer is connected with the switching circuit, the other end is connected with the high-precision galvanometer, the DSP controller is connected with the crystal oscillator, the branch galvanometer and the switching circuit, and the frequency difference of the PWM signals of any two adjacent DSP controllers is greater than the measurement bandwidth Fx of the high-precision galvanometer, so that the current ripple frequency spectrum component is moved outof the measurement bandwidth Fx of the high-precision galvanometer. According to the multi-path lithium battery formation power supply parallel operation device, the low-frequency ripple of the lithium battery formation power supply parallel operation total current is reduced, the current precision is higher, and the reliability is better.

Description

technical field [0001] The present application relates to the technical field of lithium-ion chemical power supplies, in particular to a multi-channel lithium-ion chemical power supply parallel device and a design method thereof. Background technique [0002] With people's emphasis on the environment and the country's policy support for the new energy vehicle industry, the new energy vehicle industry has developed rapidly in recent years. As the basic unit of electric energy storage for new energy vehicles, power lithium batteries have also seen huge demand. Large power lithium battery manufacturers are actively expanding production, forming a large demand for complete sets of lithium battery production equipment. [0003] The production process of lithium batteries will be different for each manufacturer, but they are inseparable from the most basic links: battery pole piece production, battery cell production, battery assembly, battery liquid injection, battery sealing, ba...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of this application provides a multi-channel lithium battery formation power parallel device and its design method to solve the problem that the low-frequency current ripple in the related art will have a great impact on the current accuracy measured by the high-precision ammeter, which cannot meet the requirements of the current lithium battery formation. The technical problem of the power supply's extremely high demand for current accuracy

Images