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Battery charging method and apparatus therefor

A battery charging and battery technology, applied in battery circuit devices, circuit devices, battery load switching, etc., can solve problems such as user inconvenience

Inactive Publication Date: 2007-05-30
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This may be inconvenient for users

Method used

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  • Battery charging method and apparatus therefor
  • Battery charging method and apparatus therefor

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Embodiment Construction

[0028] As noted above, it is desirable to fully charge the battery without overcharging the battery, which could create safety concerns, including overheating and / or explosion of the battery. Traditionally, proper charging of the battery has been achieved through the use of sensors coupled to the battery by wires. The sensor line may be connected directly to the battery, and the impedance of the line is not an issue because there is no significant current flowing through this line. However, sensor wiring is undesirable for a number of reasons: it increases cost, it may generate additional electrical signal noise, and it may create safety concerns since it will shunt safety circuits.

[0029] It will be appreciated that most battery charging methods and apparatus have a capacity sufficient to allow an associated electronic device, such as a portable hand-held device, to continue operating and charge the battery itself. What is needed is to take due account of the current appli...

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Abstract

A method of charging a battery, the method comprising applying an input charging current to a battery, interrupting the input charging current to determine a load current output from the battery and controlling the input charging current in dependence upon the determined load current.

Description

technical field [0001] The present invention relates to battery charging methods, and more particularly to such methods for batteries integrated in portable hand-held devices such as mobile phones. Background technique [0002] An inherent requirement of a portable handheld device such as a mobile phone is to contain a battery of sufficient performance to obtain the electronic power necessary to operate that portable handheld device. An example of such a battery is a lithium ion battery. Lithium-ion batteries are commonly used in handheld devices due to their high energy density. However, to get its full charge, it must be charged to a maximum voltage, usually 4.2V. If only charged to, for example, 4.0V, the battery will only have about 75% of its maximum charge. But charging a Li-ion battery above the maximum voltage (4.2V) is dangerous because it can lead to overheating, melting, and shorting of the battery. [0003] Clearly, it is necessary to regularly recharge the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0068H02J7/04
Inventor 施蒂格·拉夫恩·汉森埃米尔·弗罗丁弗兰克·乔根森
Owner NOKIA CORP