초록 ▼

In one aspect of the invention as applied to vehicles, such as electric automotive systems, battery equalization is optimized through performance simultaneously with other routine vehicle functions in the way of maintenance during periods when the temperature of the battery pack is in a lower temper

In one aspect of the invention as applied to vehicles, such as electric automotive systems, battery equalization is optimized through performance simultaneously with other routine vehicle functions in the way of maintenance during periods when the temperature of the battery pack is in a lower temperature regime. An equalization current is chosen as a function of the ambient conditions and effectiveness of the thermal system detected by the battery pack control module, so that heat can be minimized as well as then more easily removed from the battery pack, thereby also reducing the length of the process. Opportunity equalization therefore is performed more frequently than is typical at more convenient times and in a manner to optimize the process in view of existing conditions.

대표청구항 ▼

[ What is claimed is:] [1.]1. In a rechargeable electrochemical battery system having a series arrangement of multiple batteries in a pack, and a pack cooling system having a cooling mode, a method of equalizing a state of charge among the multiple batteries, comprising the steps of:establishing a p

[ What is claimed is:] [1.]1. In a rechargeable electrochemical battery system having a series arrangement of multiple batteries in a pack, and a pack cooling system having a cooling mode, a method of equalizing a state of charge among the multiple batteries, comprising the steps of:establishing a pre-selected state of charge criterion (SOC.sub.min) below which equalization will not occur;establishing a first pre-selected pack temperature criterion (T.sub.opp) above which equalization will not occur;measuring overall pack temperature;calculating state of charge; andinitiating equalization of charge in the pack at a first current if the state of charge is above said SOC.sub.min and said overall pack temperature is below T.sub.opp.