Battery pairing system and method

Abstract

The invention relates to a battery pairing system and method. The system comprises the following steps: step 1, taking multiple cells and connecting the multiple cells in series to form a series circuit; step 2, charging the multiple cells in the series circuit through a constant current power supply, and reading voltages corresponding to the multiple cells when the multiple cells are charged to be in a set voltage; and step 3, pairing multiple cells with the same voltage value to obtain a primarily paired cell pack. Compared with the prior art, the battery pairing system and method have the advantages of high pairing efficiency, short time, small floor area and low energy consumption; a battery pack paired by a dynamic voltage comparison method can accurately reach dynamic consistency, thus improving the charging / discharging effect of the battery pack.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery alignment system and method. Background technique [0002] The most critical thing in the series combination of lithium batteries is the consistency of the cells. In systems with more than dozens of strings, the consistency requirements are very high. In the past, the industry used 1. capacity division method to form teams, 2. internal resistance test method to form teams and 3. static voltage test method to form teams. It is difficult to ensure that the discharge curve is consistent according to the capacity, and it is affected by the error of the sub-container; according to the internal resistance, the same internal resistance does not represent its electrochemical conversion characteristics; according to the voltage is the most unreliable type; moreover, according to the capacity of the current use Compatibility is difficult to ensure consistent charge and discha...

AI Technical Summary

Problems solved by technology

It is difficult to ensure that the discharge curve is consistent according to the capacity, and it is affected by the error of the sub-container; according to the internal resistance, the same internal resistance does not represent its electrochemical conversion characteristics; according to the voltage, it is the most unreliable type; moreover, the current one is based on capacity. Compatibility is difficult to ensure consistent charging and discharging curves, and is affected by the error of the sub-container; according to the internal resistance, the same internal resistance does not represent its electrochemical conversion characteristics; according to the static voltage, it is the most uncommon compatibility technology that causes low accuracy The problem

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