All-day real-time initiative energy equalizing method

Abstract

The invention relates to the field of battery managing systems, and discloses an all-day real-time initiative energy equalization method. The device adopting the method is composed of a battery voltage detecting circuit, an equalization switch, an equalization resistor, a battery set and a central processing unit. The central processing unit can be communicated with the voltage detecting circuit. The voltage detecting circuit is connected with the equalization switch, and the equalization switch is connected with the equalization resistor and the battery set. When the central processing unit detects that the voltage difference between the voltage of a certain battery and the voltage of one battery with the lowest voltage among all batteries reaches a certain value and the voltage of the battery is higher than equalization starting voltage, the equalization circuit of the battery is closed, and redundant electric quantity of the battery is released through the equalization resistor; when the voltage difference between the voltage of the battery and the voltage of the battery with the lowest voltage is smaller than the equalization shutting voltage difference, the equalization circuit of the battery is opened, and equalization is stopped. By means of the method, the battery set is equalized, heat dissipation is low, the equalizing effect is good, the circuit is simple and reliable, and the method has wide applied prospects.

Description

technical field [0001] The invention belongs to the field of battery management systems and relates to an all-weather real-time active energy balancing method. Background technique [0002] With the development of society, the use of lithium batteries as power is becoming more and more widely used. Products such as electric vehicles, electric motorcycles, electric sightseeing cars, and back power supplies that use lithium batteries as their power output have emerged one after another. In many applications, lithium batteries are required to be used in groups, rather than by a single battery. In this way, battery packs with different voltages, different capacities, and different output powers can be configured to meet the requirements of various application environments. [0003] After the lithium batteries are used in groups, it is inevitable to encounter the problem of inconsistent battery capacity in the battery pack. This problem is caused by the differences in the materi...

AI Technical Summary

Problems solved by technology

This equalization method has the following disadvantages: (1) The equalization can only be turned on when charging is about to be completed, and the time is very short

Larger equalization current will generate greater heat, and the environment where the battery pack is used usually has poor heat dissipation conditions, which limits the size of the equalization current, and cannot obtain a good equalization effect for applications that require a larger equalization circuit

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