| 摘要 |
Embodiments of the present invention provide an over-current protection method and device for a lithium battery, where the device includes: a locking unit, configured to lock an over-current state of a lithium battery according to a charging/discharging over-current signal of the lithium battery, so as to continuously indicate that the lithium battery is in the over-current state; and a circuit cut-off unit, configured to output, after the locking unit locks the over-current state of the lithium battery, a drive signal to cut off a main circuit where the lithium battery is located. In the embodiments of the present invention, a locking unit locks an over-current state of a lithium battery, and the cutting-off of a switch of a main circuit is driven by using the locking unit and a circuit cut-off unit, so that execution of an over-current protection action for the lithium battery no longer depends on a CPU, and even if a CPU software fails, an over-current protection state may still be entered when an over-current state occurs, or original over-current state protection may still be effectively maintained. |
