A dynamic voltage-compensation technique for reducing charge time in lithium-ion batteries

Lithium-ion (Li-ion) battery charging systems typically use both constant-current and constant-voltage charge. By compensating the optimum charge voltage for the extra impedances in the battery charge path, the internal cell voltage can now be maintained closer to its rated value. This is beneficial because it allows delivery of optimal charge while reducing overall charge time to the theoretical full-charge capacity level.