Method for determining optimal group margin interval of single lithium battery

• Main Authors: WANG ZHIZHONG, LI ZHAOYANG, LIU DINGHONG, YI AIBIN, DONG WENKAI, ZHANG HAIBO
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

The invention provides a method for determining an optimal group margin interval of a single lithium battery, which comprises the following steps of: measuring relevant parameters of the thickness of a positive pole piece of the lithium battery, measuring relevant parameters of the thickness of a negative pole piece of the lithium battery, and determining the number of layers of the positive pole piece, the negative pole piece and a diaphragm of a battery cell, calculating the thickness of the battery cell when the battery cell enters the shell by using a set equation according to the thickness of the battery cell diaphragm, and calculating the maximum value and the minimum value of the thickness of the battery shell by using the set equation based on the thickness change of the pole piece under the lithium embedding and removing states of the lithium battery cell; and calculating and determining the optimal group margin interval of the lithium battery monomer by using a set equation according to a correction