Patent ID: 11955823
Assignee: O2MICRO INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A method comprising:
generating a protection signal at a protection terminal of a battery pack comprising a battery;
detecting said protection signal, using a first detection circuit in a load module, thereby controlling a discharge switch in said load module based on said protection signal, wherein said discharge switch is configured to allow a discharging current of said battery to flow through said discharge switch to power said load module;
detecting said protection signal, using a second detection circuit in a charge module, thereby controlling a charge switch in said charge module based on said protection signal, wherein said charge switch is configured to allow a charging current to flow through said charge switch to charge said battery;
setting said protection signal to a state of a plurality of states according to a status of said battery, said plurality of states comprising a first state, a second state, a third state, and a fourth state;
if said protection signal is in said first state, controlling said charge switch to be on and said discharge switch to be off;
if said protection signal is in said second state, controlling said charge switch to be off and said discharge switch to be on;
if said protection signal is in said third state, controlling said charge switch to be off and said discharge switch to be off; and
if said protection signal is in said fourth state, controlling said charge switch to be on and said discharge switch to be on.