Method for charging battery of portable handheld device

A technology for battery charging and handheld devices, applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as unsatisfactory temperature protection, and achieve the effect of improving charging efficiency

Active Publication Date: 2008-01-16
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, when the temperature rises rapidly in a high-temperature envi...

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  • Method for charging battery of portable handheld device
  • Method for charging battery of portable handheld device
  • Method for charging battery of portable handheld device

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0023] The invention provides a battery charging method for portable handheld devices such as mobile phones, which is used to solve the problem of temperature rise when charging with a large current and the problem of temperature rise when charging in a high-temperature environment. So that the battery can maintain constant current charging at a lower temperature for a long time.

[0024] Since the battery converts electrical energy into chemical energy and a part of heat energy when charging, this part of heat energy will cause the battery to heat up. As the battery power increases, the proportion of electrical energy converted into heat energy will increase, and th...

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Abstract

The invention provides a battery charge method for portable hand-held equipment, which comprises that the battery with normal voltage scope is charged with a plurality of charging current grades according to the temperature change and the prior electric quantity of the battery; when the charging voltage is more than a first voltage threshold value, the constant voltage charge is carried out, while, when the charging current is less than the first voltage threshold value, the charge is over. Therefore, the invention is capable of fast charging with higher current under the condition that the electric quantity of the battery is lower to enhance the charge efficiency.

Description

technical field [0001] The present invention relates to a method for charging a battery, and more particularly, to a method for charging a battery integrated in a handheld device such as a mobile phone. Background technique [0002] Handheld devices such as mobile phones need a high-energy-density battery as a power source. Lithium-ion batteries are generally used. Since lithium-ion is a very active metal, we need to strictly control its voltage and temperature when charging it. , Keep safe and regular charging when charging. At present, the charging management method of mobile phone batteries mainly has three steps, as shown in Figure 1, (1) when the voltage is lower than the minimum protection voltage of the battery, pre-charge with a small current, (2) start normal constant current charging after the voltage is normal, charge to After 4.2V, change to constant voltage charging. (3) After constant voltage charging, the current will gradually decrease with the increase of b...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/04H04Q7/32H04B1/38
CPCY02B40/00
Inventor 李良
Owner ZTE CORP
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