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Battery charger with battery life judging function

一种电池寿命、电池电压的技术，应用在电池电路装置、集电器、二次电池等方向

Inactive Publication Date: 2007-01-17
KOKI HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For batteries showing this performance, the life of the battery cannot be determined simply by judging that the battery voltage has exceeded the life judgment threshold

Method used

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  • Battery charger with battery life judging function
  • Battery charger with battery life judging function
  • Battery charger with battery life judging function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The battery life judging device according to the preferred embodiment is used to determine the battery life expiration time of various types of batteries and is provided in a charging device as an additional function to charge a battery pack or a nickel-chromium battery or a nickel-metal-hydride battery The formed battery is charged.

[0027] First, the charging device 100 will be described with reference to FIG. 1 . The charging device 100 is connected to the AC power source 1 for charging the battery pack 2 . The charging device 100 has a power supply circuit composed of a primary rectification circuit / smoothing circuit (smoothing circuit) 10 , a switching circuit 20 , and a secondary rectification circuit / smoothing circuit 30 for supplying power to charge the battery pack 2 .

[0028] Constructed inside the battery pack 2 are: a battery 2a having a pl...

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PUM

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Abstract

There is provided a charging device including a battery voltage detection circuit for detecting a voltage of a battery pack; and a microcomputer having a RAM for temporarily storing the battery voltage detected by the battery voltage detection circuit, and a CPU for reading from A battery voltage gradient is calculated from the battery voltage detected by the battery voltage detection circuit and the battery voltage sampled from a predetermined time earlier. The charging device determines that the battery life has expired when the voltage of the battery pack before charging is less than or equal to a specified value (J) and the battery voltage gradient within a specified time period after charging starts is greater than or equal to a first specified value (K). The charging device also includes a display circuit that notifies the user when the life of the battery pack has deteriorated.

Description

technical field [0001] The present invention relates generally to battery chargers for nickel-metal-hydride batteries or other secondary batteries, and more particularly, to battery life judging devices for use in battery chargers. Background technique [0002] Rechargeable batteries are often used as a power source for portable devices. When the capacity of the battery in such a device is lost, the battery is removed from the portable device, charged with a charging device, and then reinstalled in the portable device. By repeating this process, the rechargeable battery can be used multiple times. However, as the charge / discharge cycle is repeated, the discharge capacity of the battery decreases, as Figure 5 shown in . As the initial performance of the battery decreases in this way, the number of times the battery can be charged and discharged is limited. Traditionally, users have to use their experience etc. to determine battery life expiration on a case by case basis. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M10/48H02J7/00
CPCG01R31/3648G01R31/3679G01R31/3682G01R31/362G01R31/392G01R31/3646G01R31/3835
Inventor 荒馆卓央高野信宏船桥一彦
Owner KOKI HLDG CO LTD
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