Battery pack electronic equalization fault-tolerant system

Abstract

The invention relates to a battery pack electronic equalization fault-tolerant system, which comprises a battery pack, the battery pack is formed by connecting a plurality of battery monomers in series and in parallel, each battery monomer is provided with a switch, and two ends of each battery monomer are connected with fault-tolerant modules in parallel; when the single batteries fail, the switch is turned on to enable the single batteries to be in a standing state, the fault-tolerant module constructs a virtual battery, the virtual battery constructed by the fault-tolerant module transfers energy to other single batteries according to actually required signals during charging, and the virtual battery constructed by the fault-tolerant module transfers energy to other single batteries according to actually required signals during discharging. And the virtual battery constructed by the fault-tolerant module absorbs energy from other battery monomers to fill the energy at the position. The use safety of the battery pack can be improved, the service time of the battery can be prolonged when the single battery of the battery pack fails, the potential safety hazard caused by the failure of the battery is avoided, and the battery can be normally used even if the single battery fails.

Description

Technical field [0001] The present invention relates to the field of battery management technology, in particular to a battery pack electronic equalization fault tolerance system. Background [0002] In order to meet the voltage and capacity level requirements of the large-capacity energy storage system, it is generally necessary to use a large number of battery cells in series and parallel. However, in the process of battery pack use, each battery cell due to the existence of manufacturing process and application environment differences lead to its inconsistency further expanded, the battery has different degrees of aging, the performance decline of the battery cell with faster performance will restrict the capacity utilization and life of the entire battery pack, and even more likely to appear battery cell failure, resulting in the entire battery pack can not work properly, in extreme cases may also lead to safety accidents. [0003] In recent years, domestic and foreign resear...

AI Technical Summary

Problems solved by technology

However, during the use of the battery pack, the inconsistency of each battery cell is further enlarged due to the differences in the manufacturing process and application environment, and the battery has different aging degrees. The battery cell with faster performance degradation will restrict the performance of the entire battery pack. Capacity utilization and life, and even more likely to cause battery cell failure, resulting in the failure of the entire battery pack, and in extreme cases, it may cause a safety accident

[0003] In recent years, domestic and foreign research on thermoelectricity has focused on battery energy balance management methods, and there has been less research on fault-tolerant methods after battery cell failures. Therefore, a battery pack electronic balance fault-tolerant system is urgently needed to improve the safety of battery packs. And how to continue to use the battery pack after the failure of the single battery

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