Battery Control System Temperature-Conditional Voltage Balancing

The control unit changes the parameter being controlled from voltage to residual capacity. By measuring both voltage and temperature, and calculating residual capacity based on these parameters, the system equalizes residual capacities instead of voltages. This resolves the contradiction because residual capacity is the more fundamental parameter that determines actual battery state, and equalizing it prevents the inverse variation problem that occurs when only voltage is equalized in the presence of temperature differences.

The system introduces temperature as a feedback parameter to the balance control decision-making process. By continuously monitoring temperature differences between battery units and using this information to determine whether voltage differences are genuine or temperature-induced, the system avoids unnecessary balance control operations. This resolves the contradiction by adding a conditional check that prevents spurious control actions while maintaining necessary voltage equalization when truly needed.

The control unit is designed to perform multiple functions: it measures both voltage and temperature, calculates residual capacity based on these measurements, determines whether balance control is needed, and executes the appropriate control actions. By making the control unit multi-functional rather than adding separate dedicated components for each function, the system achieves the benefit of preventing unnecessary control while minimizing the increase in device complexity. The same control unit that would exist for voltage management now also handles temperature compensation logic.