What are the performance implications of the modules and systems used in lithium-ion batteries?

Lithium ion battery module

The battery module by the number of monomer battery series parallel combination form, is composed of the elements of battery pack.Battery module in the actual operation is rarely as a main body is single evaluation, occasionally some systems, detects the voltage value.

In fact, people often put the module as a large battery.Monomer consistency problems, module, its internal batteries voltage difference is the key point of equilibrium function inspection.Of the performance of the battery module is often limited by the battery module performance in the lowest battery monomer, and mainly reflects on the capacity of the indicators.When charging, voltage high monomer first with;Low discharge, the voltage of batteries it finished first.

And probably the two batteries are not the same.So batteries parameters consistency across the module has a decisive influence on the module performance.Consistency, module level is more than single out of consideration of a parameter.This parameter at the beginning of the module group, through various means for screening to ensure that the batteries;Module production is completed, the consistency is one of the important indices for its acceptance;In the process of operation, can only rely on the balance function of BMS to guarantee.

Lithium ion battery system

Generally speaking, modules in series battery pack.Batteries in addition to inherit all parameters of module, the total voltage determines the voltage of the electric vehicle power system platform, is a very important parameter.

The battery pack on the whole there are several safety indicators will be continuously monitor.Battery pack output is negative to ground resistance, the system leakage current, high pressure interlock signal and system, the maximum and minimum temperature system maximum temperature, maximum temperature rise rate of system system maximum and minimum monomer voltage and so on.

The page contains the contents of the machine translation.