Group matching method, group matching device and group matching system for lithium ion batteries

Abstract

The invention provides a Group matching method, a group matching device and a group matching system for lithium ion batteries. The lithium ion battery grouping method comprises the following steps: detecting static parameters of a battery cell of a to-be-detected lithium ion battery; detecting the voltage values of the first sorted lithium ion batteries in a plurality of first preset charge states to obtain a plurality of first discharge voltages, the first sorted lithium ion batteries being to-be-detected lithium ion batteries of which the static parameters are within a corresponding threshold range; calculating a voltage change value according to a first discharge voltage corresponding to a second sorted lithium ion battery, wherein the second sorted lithium ion battery is a first sorted lithium ion battery of which the first discharge voltage is within a corresponding voltage threshold range; and determining that the third sorted lithium ion battery is a to-be-tested lithium ion battery meeting the matching requirement, wherein the third sorted lithium ion battery is a second sorted lithium ion battery of which the voltage change value is within a corresponding voltage change threshold range. The group matching method solves the problem that the group matching method of the lithium ion battery in the prior art is difficult to ensure the consistency of dynamic charging and discharging of the lithium ion battery.

Description

technical field [0001] The present application relates to the field of lithium-ion power batteries, in particular, to a lithium-ion battery assembly method, an assembly device, a computer-readable storage medium, a processor, and an assembly system. Background technique [0002] At present, the large-scale application of lithium-ion batteries in new energy vehicles, smart grids and other fields is increasing year by year. Unlike the application in portable energy storage products (mainly single cells or small modules), lithium-ion batteries for power need The energy storage system or battery pack composed of several lithium-ion batteries combined in series and parallel is loaded on the car. The inconsistency of battery parameters is a key factor affecting the service life of the battery system, similar to the "barrel" short-board effect, the performance of the entire system depends on the "weakest battery or module", although the existence and technical level of battery ther...

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Problems solved by technology

[0005] The main purpose of the present application is to provide a method for grouping lithium-ion batteries, a grouping device, a computer-readable storage medium, a processor, and a grouping system, so as to solve the problem that the grouping method of lithium-ion batteries in the prior art is difficult to ensure lithium The problem of battery dynamic charge and discharge consistency

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