US 8,896,269 B2Granted

Battery management device and portable computer

AssigneesBeijing Lenovo Software Ltd., Lenovo (Beijing) Limited

InventorsShuangcheng Zhao, Xiaoren Cheng, Weizhi Lin, Ling Yao

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Abstract

The present invention provides a battery management device and a portable computer, the battery management device is for managing the rechargeable battery provided in a portable computer, the portable computer is provided with a charge circuit for charging a battery, the battery management device comprises: a discharge circuit for discharge the battery; a acquiring module for acquire the mode determining parameter; a first determining module for judging whether the battery storage mode is entered according to the mode determining parameter; a first control module for controlling the charge circuit or the discharge circuit to control the amount of electrical charge of the battery so that the amount of electrical charge of the battery is lower than the second amount of electrical charge threshold in the battery storage mode; the performance of the battery when deposited with the amount of electrical charge lower than the second amount of electrical charge threshold is better than the performance when deposited with the amount of electrical charge higher than the second amount of electrical charge threshold. The present invention alleviates the attenuation of the amount of electrical charge capacity of the rechargeable battery of the portable computer.

Claims12

Dependent claims

A battery management device for managing a rechargeable battery in a portable computer, the portable computer having a charge circuit for charging the rechargeable battery, the battery management device comprises:

a discharge circuit for discharging the rechargeable battery;
an acquiring module configured to acquire a mode determining parameter;
a first determining module configured to determine whether a battery storage mode is entered according to the mode determining parameter;
a first control module configured to control the charge circuit or the discharge circuit, thereby controlling the amount of electrical charge in the rechargeable battery that is in the battery storage mode such that the amount of electrical charge in the rechargeable battery is lower than a second amount of electrical charge threshold, wherein the performance of the rechargeable battery when being stored with an amount of electrical charge that is lower than the second amount of electrical charge threshold is better relative to the performance when being stored with an amount of electrical charge that is higher than the second amount of electrical charge threshold;
wherein the mode determining parameter comprises the amount of electrical charge in the rechargeable battery and a current usage state of an external power supply, the first determining module configured to determine that the battery storage mode is entered when the period during which the amount of electrical charge of the battery is higher than a first amount of electrical charge threshold that exceeds a first time threshold and meanwhile the portable computer currently uses the external power supply, and determine that the battery storage mode is not entered when the period during which the amount of electric charge of the battery is higher than the first amount of electric charge threshold exceeds a first time threshold and the portable computer does not currently use the external power supply, the second amount of electrical charge threshold that is less than the first amount of electrical charge threshold;
wherein the current usage state of the external power supply is an actual current usage state of the external power supply and is not predicted.

3 more elements

A portable computer having a main board, a rechargeable battery connected with the main board and a charge circuit for charging the battery, and a battery management device, the battery management device comprises:

a discharge circuit for discharging the battery;
an acquiring module configured to acquire a mode determining parameter;
a first determining module configured to determine whether a battery storage mode is entered according to the mode determining parameter;
a first control module configured to control the charge circuit or the discharge circuit to control an amount of electrical charge of the battery in the battery storage mode such that the amount of electrical charge of the battery is lower than a second amount of electrical charge threshold;
the performance of the battery when being stored with an amount of electrical charge is lower than the second amount of electrical charge threshold that is better relative to the performance when being stored with an amount of electrical charge higher than the second amount of electrical charge threshold;
wherein the mode determining parameter comprises the amount of electrical charge of the battery and a current usage state of an external power supply, the first determining module configured to determine whether the battery storage mode is entered when the period during which the amount of electrical charge of the battery is higher than a first amount of electrical charge threshold exceeds a first time threshold and meanwhile the portable computer currently uses the external power supply, and determine that the battery storage mode is not entered when the period during which the amount of electric charge of the battery is higher than the first amount of electric charge threshold exceeds a first time threshold and the portable computer does not currently use the external power supply, the second amount of electric charge threshold is less than the first amount of electric charge threshold;
wherein the current usage state of the external power supply is an actual current usage state of the external power supply and is not predicted.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/142,833Filed 24 Dec 2010
Priority: CN 2009 1 024448731 Dec 2009
Published: US 2012/0262107 A118 Oct 2012
Granted: 25 Nov 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01M 10/441
Methods for charging or discharging: for several batteries or cells simultaneously or sequentially
G06F 1/263
Power supply means, e.g. regulation thereof: arrangements for using multiple switchable power supplies, e.g. battery and AC
H02J 7/855
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: with circuits adapted for supplying loads from…
H02J 7/96
Regulation of charging or discharging current or voltage: in response to battery voltage