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Apparatus for detecting state of charge of battery

A battery charging and battery technology, which is applied in secondary battery charging/discharging, battery circuit devices, electric vehicle charging technology, etc., can solve problems such as difficult to accurately detect battery charging polarization, and achieve the effect of preventing unnecessary space

Active Publication Date: 2008-04-30
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods result in spreading the time required to counteract the battery charge polarization and also spreading the degree to which the counterbalance of the battery charge polarization changes with respect to time
Therefore, it is difficult to accurately detect the cancellation of battery charge polarization

Method used

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  • Apparatus for detecting state of charge of battery
  • Apparatus for detecting state of charge of battery
  • Apparatus for detecting state of charge of battery

Examples

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Embodiment Construction

[0028] Now, a battery state detection device for detecting cancellation of charge polarization of a battery according to the present invention will be discussed with reference to the accompanying drawings.

[0029] FIG. 1 is a block diagram of an entire system for charging a battery including a battery state detection device according to the present invention.

[0030] The system for charging a battery shown in FIG. 1 includes an engine control unit (ECU) 1, an engine of a motor vehicle (hereinafter, referred to as "engine") 2, an alternator ( Hereinafter, these will be referred to as “alternator”) 3 , battery 5 , battery state detection device 6 and key switch 7 .

[0031] The ECU 1 is an external control unit that monitors the rotational state of the rotation of the engine 2 (for example, the rotational speed of the engine 2 ) and controls the rotational state of the engine 2 . The engine 2 drives the alternator 3 by transmitting the rotation of the engine to the belt of th...

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Abstract

There is provided a battery condition detecting apparatus which comprises: means for detecting a discharging and charging current from the battery; means for detecting whether or not a negative acceleration of charging current changes in its sign from negative to zero during charging of the battery based on a result of detecting the discharge current; means for calculating an integrated charged capacity of the battery by integrating an instantaneous charging current during charging of the battery; means for controlling an alternator mounted in an automotive vehicle so as to control an output electric power generated by the alternator such that a discharging current from the battery is kept to be constant; and means for determining that the charge polarization is cancelled, if the integrated discharged capacity becomes to be equal to the integrated charged capacity.

Description

[0001] Cross-references to related applications [0002] This application is related to Japanese Patent Application No. 2006-288224 filed on October 24, 2006, the contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a battery state detection device for detecting polarization offset of a battery mounted on a motor vehicle or truck, and more particularly to a battery state detection device for detecting polarization generated in a battery during battery charging equipment. Background technique [0004] There is known a prior art battery state detecting device which detects the cancellation of the charging polarization of a battery mounted on a motor vehicle or truck after the battery starts to discharge, wherein the charging polarization is generated in the battery during charging of the battery of. Such an apparatus is disclosed, for example, in Japanese Patent Laid-Open No. 2002-184469. In the device described i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44G01R31/36
CPCY02E60/12Y02T10/7088B60L11/1851Y02T10/705H01M10/48Y02T90/128Y02T10/7005G01R31/3613Y02T90/14B60L11/185H02J7/163H01M10/44Y02T10/7072G01R31/3832B60L53/11B60L58/10Y02T10/70Y02E60/10Y02T90/12
Inventor 高桥伸浅田忠利
Owner DENSO CORP
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