A multi-channel lithium-ion power supply parallel device and its design method

Abstract

This application relates to a multi-channel lithium-ion power supply parallel device and its design method. The device includes a direct current power supply DC, a high-precision ammeter and a plurality of parallel-connected lithium-ion power modules. The lithium-ion power module includes a switch circuit and a crystal oscillator. , branch ammeter and DSP controller, the switch circuit is connected to the DC power supply DC; one end of the branch ammeter is connected to the switch circuit, and the other end is connected to the high-precision ammeter; the DSP controller is connected to the crystal oscillator, the branch ammeter and the switch circuit All are connected; 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 as to move the current ripple spectrum components beyond the measurement bandwidth Fx of the high-precision galvanometer. The multi-channel lithium-ion power supply paralleling device of the present application reduces the low-frequency ripple of the total current of the parallel lithium-ion power supply, and has higher current accuracy and better reliability.

Description

Technical field[0001]This application relates to the technical field of lithium-ion battery forming power supplies, and in particular to a multi-channel lithium battery- forming power source parallel device and a design method thereof.Background technique[0002]With people’s attention to the environment and the country’s policy support for the new energy automobile industry, the new energy automobile industry has developed rapidly in recent years. As the basic unit of electric energy storage for new energy automobiles, there is also a huge demand for power lithium batteries. Large power lithium battery manufacturers are actively expanding production, forming a larger demand for complete sets of equipment for lithium battery production.[0003]The production process of lithium batteries varies from manufacturer to manufacturer, but they are all inseparable from the most basic links: battery pole piece production, battery cell production, battery assembly, battery injection, battery seal...

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

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