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

Claim 0:
1. A portable device comprising:
a load module comprising: a discharge switch configured to allow a discharging current of a battery to flow through said discharge switch to power said load module, and a first detection circuit configured to detect a protection signal, thereby controlling said discharge switch based on said protection signal;
a charge module comprising: a charge switch configured to allow a charging current to flow through said charge switch to charge said battery, and a second detection circuit configured to detect said protection signal, thereby controlling said charge switch based on said protection signal; and
a battery pack coupled to said load module and said charge module, said battery pack comprising said battery and further comprising:
a protection terminal that provides said protection signal to protect said battery; and
protection circuitry, coupled to said protection terminal, that sets said protection signal to a state of a plurality of states according to a status of said battery, thereby controlling said charge switch and said discharge switch, wherein said plurality of states comprise a first state, a second state, a third state, and a fourth state, and wherein:
said protection signal, if in said first state, causes said charge switch to be turned on and said discharge switch to be turned off;
said protection signal, if in said second state, causes said charge switch to be turned off and said discharge switch to be turned on;
said protection signal, if in said third state, causes said charge switch to be turned off and said discharge switch to be turned off; and
said protection signal, if in said fourth state, causes said charge switch to be turned on and said discharge switch to be turned on.