Reliable battery pairing method

Abstract

The invention relates to the technical field of battery production and application, in particular to a reliable battery pairing method. The reliable battery pairing method comprises the following steps that A, a to-be-tested cell and charging equipment are connected; B, the charging current of the to-be-tested cell is set, and the fixed-value energy is input; C, voltage parameters and time parameters of the cell in the charging process are recorded; D, according to the voltage parameters and the time parameters, a right-angle coordinate system is established; and E, cell pairing is conducted according to the right-angle coordinate system. Cell pairing is conducted through the fixed-value energy, the cell pairing success rate can be increased, the cost is reduced, the battery set performance is more reliable, and the safety tact is greatly improved. A relatively-balanced battery can still be matched in cells with the large volume difference; and the labor hour for testing the voltage and the internal resistance of the cell is shortened, durability and long-time performance of the paired battery can be improved, the lithium battery CC-CV charging balance mode is still maintained during long-time circulation, and the product is more reliable and safer.

Description

Technical field [0001] The invention relates to the technical field of battery production and application, in particular to a method for reliable battery pairing. Background technique [0002] As the production and manufacturing of lithium batteries become more and more mature, their application areas are constantly being renovated, and the demand is increasing. In addition to the early light, thin and short electronic products, they are now more widely used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace, etc. field. [0003] In actual use, it is often a series-parallel combination of multiple lithium batteries. Therefore, how to select matching batteries can be unified to ensure that there is no problem in long-term use, which is a very important topic and technology. [0004] The traditional pairing technology is to pair batte...

AI Technical Summary

Problems solved by technology

[0015] However, the methods mentioned above are all focused on the changes in process parameters, without thinking and matching design for the rationality of the theoretical performance of lithium batteries, and the matching results are not reliable.

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