Circuit for controlling power output from battery pack and battery pack

1. A portable communication device comprising:

a battery pack for supplying power to a system to be powered;

a power dissipation element disposed outside the battery pack;

a detecting circuit configured to detect a state of the battery pack; and

at least one first switch electrically connected to the battery pack and the detecting circuit, wherein the detecting circuit is configured to control the at least one first switch to:

electrically disconnect the power dissipation element from the battery pack based on the state of the battery pack not satisfying a specified condition, wherein the specified condition indicates an abnormal state of the battery pack; and

electrically connect the power dissipation element to the battery pack for supplying at least part of the power to the power dissipation element, based on the state of the battery pack satisfying the specified condition.

2. The portable communication device of claim 1 , further comprising a power management integrated circuit (PMIC) connected to the battery pack and configured to manage power of the battery pack, wherein

the power management integrated circuit (PMIC) is part of the system to be powered and is configured to be electrically connected to the battery pack based on the state of the battery pack not satisfying the specified condition.

3. The portable communication device of claim 2 , further comprising at least one second switch disposed inside the battery pack and configured to selectively connect the battery pack and the power management integrated circuit with each other.

4. The portable communication device of claim 3 , further comprising at least one third switch connected in parallel to at least one second switch inside the battery pack,

wherein the at least one third switch is configured to connect the battery pack to the power dissipation element based on the state of the battery pack satisfying the specified condition.

5. The portable communication device of claim 3 , further comprising at least one protecting circuit connected to at least one second switch inside the battery pack,

wherein the at least one protecting circuit is configured to control the at least one second switch to not supply power to the power management integrated circuit based on the state of the battery pack satisfying another specified condition.

6. The portable communication device of claim 1 , wherein the detecting circuit is configured to detect at least one of: a voltage applied between a positive electrode and a negative electrode of the battery pack, a temperature of the battery pack, or a gas concentration around the battery pack, and

wherein, the detecting circuit is configured to control the at least one first switch to be turned on to supply power to the power dissipation element from the battery pack based on at least one of: the voltage, the temperature, or the gas concentration, falling within a specified range.

7. The portable communication device of claim 6 , wherein the detecting circuit comprises one or more sensors configured to detect values corresponding to the voltage, the temperature, and/or the gas concentration.

8. The portable communication device of claim 1 , wherein the power dissipation element comprises a plurality of resistors connected in series or parallel to each other.

9. The portable communication device of claim 8 , wherein, some of the plurality of resistors are connected to the battery pack when the power dissipation element is configured as a plurality of resistors connected in parallel.

10. An electronic device system comprising:

a battery pack;

a power management integrated circuit (PMIC) configured to supply power output from the battery pack to an electronic device to be powered;

a power dissipation element disposed outside the battery pack; and

a protecting circuit configured to control the power output from the battery pack, wherein the protecting circuit is configured to:

detect a state of the battery pack;

electrically disconnect the battery pack from the power dissipation element and electrically connect the battery pack to the power management integrated circuit based on the state not satisfying a specified condition, wherein the specified condition indicates an abnormal state of the battery pack; and

electrically connect the battery pack to the power dissipation element and electrically disconnect the battery pack from the power management integrated circuit for supplying at least part of the power to the power dissipation element, based on the state satisfying the specified condition.

11. The electronic device system of claim 10 , wherein at least a part of the protecting circuit is disposed outside the battery pack.

12. The electronic device system of claim 10 , wherein the protecting circuit comprises one or more switches configured to operate to electrically connect/disconnect the battery pack to/from the power dissipation element or the power management integrated circuit.

13. The electronic device system of claim 12 , wherein the one or more switches comprise a first switch configured to operate to supply the power to the power management integrated circuit and a second switch configured to operate to not supply the power to the power dissipation element based on the state not satisfying the specified condition.

14. The electronic device system of claim 13 , wherein the first switch is configured to operate to not supply the power to the power management integrated circuit and the second switch is configured to operate to supply the power to the power dissipation element based on the state satisfying the specified condition.

15. The electronic device system of claim 13 , wherein at least a part of the first switch is disposed inside the battery pack.

16. The electronic device system of claim 13 , further comprising a third switch connected in parallel to the first switch, wherein the third switch is configured to operate to supply the at least part of the power to the power dissipation element while bypassing the first switch when the state satisfies the specified condition.

17. The electronic device system of claim 10 , wherein the protecting circuit is configured to detect at least one of: a voltage applied between a positive electrode and a negative electrode of the battery pack, a temperature of the battery pack, or a gas concentration around the battery pack, and

wherein the protecting circuit is electrically connected such that the power output from the battery pack is supplied to the power dissipation element based on at least one of the voltage, the temperature, or the gas concentration falling within a specified range.

18. The electronic device system of claim 10 , wherein the power dissipation element comprises a plurality of resistors connected in parallel to each other, and

wherein the protecting circuit is configured to connect some of the plurality of resistors to the battery pack based on the state satisfying the specified condition.

19. A battery pack comprising:

a housing;

a battery cell for supplying power to a power management integrated circuit, disposed inside the housing;

one or more switches disposed inside the housing; and

a detecting circuit configured to detect a state of the battery cell,

wherein the detecting circuit is configured to control the one or more switches to:

electrically connect the battery cell to the power management integrated circuit disposed outside the battery pack and electrically disconnect the battery cell from power dissipation circuitry disposed outside the battery pack based on the state of the battery cell not satisfying a specified condition, wherein the specified condition indicates an abnormal state of the battery cell; and

electrically disconnect the battery cell from the power management integrated circuit and electrically connect the battery cell to the power dissipation circuitry for supplying at least part of the power to power dissipation circuitry based on the state of the battery cell satisfies satisfying the specified condition.

20. The battery pack of claim 19 , wherein the detecting circuit is further configured to:

detect the state of the battery cell; and

provide a signal corresponding to the detected state to the one or more switches.