Charge Discharge Control Circuit Power Consumption Reduction

The patent applies dynamics by making the current paths controllable rather than fixed. MOS transistors are introduced to dynamically connect or disconnect current paths based on operational conditions. Specifically, the first and second MOS transistors control the connection status of constant current sources, and the third and fourth MOS transistors control the clamp circuit, allowing the system to transition between active and low-power states while maintaining voltage withstanding capability through controlled connectivity.

The patent implements discarding and recovering by selectively deactivating components during idle or safe operational states. When batteries are fully charged or discharged, or during normal operation where protection is not needed, the MOS transistors disconnect the constant current sources and clamp circuit from active current paths, effectively 'discarding' their power consumption temporarily while preserving their protective functions when needed.

The patent transforms static always-connected protection circuits into dynamic controllable circuits. MOS transistors are positioned in series with constant current sources and clamp circuits to control their connection status. Control signals adjust the conductivity of these MOS transistors based on battery charge/discharge states, enabling the protection circuits to be active only when necessary, thus reducing continuous power consumption while maintaining reliability.

The patent extracts the power consumption aspect from the protection function by using MOS transistors as isolation elements. The constant current sources and clamp circuits are effectively 'taken out' of the active current path when protection is not needed, separating their protective function from their power consumption. This allows the system to maintain protection capability while eliminating unnecessary energy loss during normal operation.