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Method and device for detecting inner state of chargeable cell and equipment with the same

A detection method and technology of internal state, applied in the direction of measuring devices, measuring electricity, secondary batteries, etc., can solve the problems of inability to measure, expand the scale, and be unpractical, and achieve the effect of avoiding sudden stop and prolonged operation time.

Inactive Publication Date: 2007-09-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not practical because such impedance measuring equipment for measuring impedance requires an alternating current generating circuit, and due to this, the equipment involved is inevitably enlarged in size, and in addition, during operation of the rechargeable battery , cannot measure

Method used

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  • Method and device for detecting inner state of chargeable cell and equipment with the same
  • Method and device for detecting inner state of chargeable cell and equipment with the same
  • Method and device for detecting inner state of chargeable cell and equipment with the same

Examples

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example 1

[0636] In this example, as rechargeable batteries to be checked (i.e., rechargeable batteries to be checked), three batteries with a diameter of 17 mm, a length of 67 mm, and a rated capacity of 1300 mAh are provided, each in a suspended state without charging or discharging. commercial lithium-ion rechargeable batteries (as Example 1, Example 2 and Example 3). The detection method according to the present invention detects the three rechargeable batteries under investigation for their internal states.

[0637] In Example A, for a normal commercial Li-ion rechargeable battery (diameter 17mm, length 67mm, rated capacity 1300mAh) corresponding to each of the three rechargeable batteries under investigation (Example 1-Example 3) , to obtain the characteristic-related basic data of the relationship between the remaining capacity (Q) and the open circuit voltage (Voc), and the functional expressions Voc(Q) and Q(Voc) based on the basic data.

[0638] With reference to the above ba...

example 2

[0645] In this example, as for the rechargeable battery to be examined, three commercially available lithium-ion rechargeable batteries with a diameter of 17 mm, a length of 67 mm, and a rated capacity of 1300 mAh are provided, each in a suspended state without charging or discharging (as example 1, example 2 and example 3). The detection method according to the present invention detects the three rechargeable batteries under investigation for their internal states.

[0646] In Example A, for a normal commercial Li-ion rechargeable battery (diameter 17mm, length 67mm, rated capacity 1300mAh) corresponding to each of the three rechargeable batteries under investigation (Example 1-Example 3) , obtain the basic data related to the relationship between the remaining capacity (Q) and the open circuit voltage (Voc) and the characteristics, and the functional formulas Voc(Q) and Q(Voc) based on the basic data.

[0647] According to the program shown in Figure 6, each of the three re...

example 3

[0652] In this example, as for the rechargeable battery to be examined, nine commercially available lithium ion rechargeable batteries having a diameter of 17 mm, a length of 67 mm, and a rated capacity of 1300 mAh each in a suspended state without charging or discharging were provided. The detection method according to the present invention detects the nine rechargeable batteries under investigation for their internal states.

[0653] In Example A, for a normal commercial Li-ion rechargeable battery (17mm in diameter, 67mm in length, 1300mAh rated capacity) corresponding to each of the nine rechargeable batteries under investigation, the battery temperature (T) is obtained , discharge current (Id), battery voltage (Vd), and remaining capacity (Q) of a normal rechargeable battery at the time of discharge operation, characteristic-related basic data and a functional formula based on the basic data Vd (Q , Id, T) and Q (Vd, Id, T).

[0654] Under the condition of keeping the te...

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Abstract

A detecting method for detecting an internal state of an inspective rechargeable battery (Ba), said internal state including a deterioration state, an electricity storable capacity, a remaining capacity, and an internal resistance of said inspective rechargeable battery (Ba), comprising: (1) a step in which basic data (BD) of characteristics of a normal non-deteriorated rechargeable battery (Bn) as a reference rechargeable battery for said inspective rechargeable battery (Ba) are provided; and (2) a step in which for said inspective rechargeable battery (Ba), a voltage value or / and a current value thereof are measured, and the measured result is compared with said basic data (BD) obtained in said step (1) to judge whether or not said inspective rechargeable battery (Ba) is of a deterioration mode and to detect the internal state thereof.

Description

[0001] The application of the present invention is a divisional application of the patent application with the application number 01137101.3, the application date being May 23, 2001, and the title of the invention is "Method, device and equipment with the device for detecting the internal state of a rechargeable battery". technical field [0002] The invention relates to a detection method for detecting the internal state of a rechargeable battery and a detection device suitable for carrying out said detection method. Internal state here means wear state, remaining capacity (=currently stored power=dischargeable capacity), usable capacity (=current remaining power still capable of operating the device), charging capacity, storable power, etc. of said rechargeable battery. capacity and internal resistance. The invention also relates to a device with said detection device. The present invention includes a program for detecting the internal state of the rechargeable battery and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M10/48G01R31/02
CPCG01R31/3679G01R31/3662G01R31/025G01R31/389G01R31/392G01R31/52G01R31/36
Inventor 川上総一郎出藏靖三郎
Owner CANON KK