[특허]Battery residual capacity displaying system with discharged electrical quantity computation section

Battery residual capacity displaying system with discharged electrical quantity computation section 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-010/48
출원번호	US-0140501 (1993-10-25)
우선권정보	JP-0322968 (1992-12-02); JP-0322969 (1992-12-02); JP-0322970 (1992-12-02)
발명자 / 주소	Hasegawa Hirokazu (Fujisawa JPX)
출원인 / 주소	Matsushita Electric Industrial Co., Ltd. (Osaka JPX 03)
인용정보	피인용 횟수 : 28 인용 특허 : 0

초록 ▼

A system for displaying the residual capacity of a secondary battery so as to update the battery capacity when the battery discharges from its full charged condition to a predetermined voltage level, in which this predetermined voltage is selected to be sufficiently higher than the operation halting voltage of a portable electrical apparatus to be connected, and the quantity of electricity discharged until the predetermined voltage level is reached is suitably corrected to determine the newest battery capacity, so that the battery capacity can be accurately updated under the actual operating condition with a high frequency and high precision.

대표청구항 ▼

A system for displaying a residual capacity of a secondary battery, said system comprising: a current detection resistor for converting a charging current and a discharge current of said secondary battery into very small voltages respectively; charging and discharging current detection means, comprising a charging side operational amplifier and a discharge side operational amplifier, for amplifying the very small voltages appearing across said current detection resistor respectively to generate resultant signals and outputting the resultant signals respectively; voltage drop detection means for detecting a situation where a voltage of said secondary battery has dropped to a level lower than a predetermined setting and outputting a voltage drop signal when said situation is detected; temperature detection means for detecting an ambient temperature of said secondary battery to generate a temperature signal and outputting the temperature signal; electrical quantity computation means, receiving the resultant signals of said charging and discharge current detection means together with the temperature signal of said temperature detection means as its inputs, for deciding whether an operation mode of said system is a charging mode, a discharge mode or a stand-by mode and computing a quantity of electricity in that mode; charging completion detection means for producing an output signal and setting its output signal when completion of charging said secondary battery is detected, but resetting its output signal when charging said secondary battery is started; discharged electrical quantity integration means for integrating the quantity of electricity at time intervals of a predetermined period to derive a first integrated value when the output signal of said charging completion detection means is set and a decision of said electrical quantity computation means indicates the discharge mode, but, when the output signal of said charging completion detection means is reset, nullifying the first integrated value irrespective of the decision of said electrical quantity computation means; capacity memory means for storing the first integrated value integrated by said discharged electrical quantity integration means as a newest battery capacity when the output signal of said charging completion detection means is set and the voltage drop signal is first outputted from said voltage drop detection means after the charging is started; electrical quantity integration means for obtaining a second integrated value by integrating, at time intervals of the predetermined period, the quantity of electricity by addition when the decision of said electrical quantity computation means indicates the charging mode, but by subtraction when the decision of said electrical quantity computation means indicates the discharge mode, thereby determining the residual capacity on the basis of a ratio of the second integrated value to the first integrated value stored in said capacity memory means, said electrical quantity integration means setting the second integrated value to correspond to the value of the residual capacity at the predetermined voltage level when the voltage drop signal is first outputted from said voltage drop detection means after the charging is started, but setting the second integrated value to correspond to the residual capacity of 100% when the output signal of said charging completion detection means is set as a result of the charging; and display means for displaying the residual capacity stepwise on the basis of the value of the residual capacity determined by said electrical quantity integration means.

이 특허를 인용한 특허 (28)

Kanazawa Itaru (Kanagawa-ken JPX), Battery capacity meter.
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Watanabe, Hidemitsu, Battery charge/discharge current detection apparatus.
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Kazuyuki Sakakibara JP, Battery charging device.
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Coe, Carlos; Hurst, Aeron, Battery power transfer system.
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Saigo Tsutomu,JPX ; Arai Yoichi,JPX, Battery remaining capacity measuring apparatus.
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Arai Youichi (Shizuoka-ken JPX) O\Toole Brendan (Co. Kerry IEX) Saigo Tsutomu (Shizuoka-ken JPX) Shimoyama Kenichi (Shizuoka-ken JPX) Kumagai Ryo (Shizuoka-ken JPX) Takada Yoshihide (Shizuoka-ken JPX, Battery remaining capacity measuring device.
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Irvin David Rand, Battery-discharge-protection system for electronic accessories used in vehicles containing a battery.
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Saito, Jun, Charging control apparatus for electric vehicle.
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Tanaka, Masatomo; Shimizu, Yoshifumi; Ichihashi, Akira; Yamaguchi, Akira, Charging control apparatus, battery, electronic device, vehicle, charging control method, an electric storage system and charging control unit.
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Nakamura Yoichi,JPX ; Saito Takashi,JPX ; Coldwell Phil,GBX ; Hart Nigel,GBX, Control system and control method for uninterruptible power supply.
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Matsuda Kouichi,JPX ; Saeki Mitsuo,JPX ; Tanaka Nobuo,JPX ; Ozawa Hidekiyo,JPX, Control system for charging batteries and electronic apparatus using same.
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Matsuda, Kouichi; Saeki, Mitsuo; Tanaka, Nobuo; Ozawa, Hidekiyo, Control system for charging batteries and electronic apparatus using same.
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Matsuda, Kouichi; Saeki, Mitsuo; Tanaka, Nobuo; Ozawa, Hidekiyo, Control system for charging batteries and electronic apparatus using same.
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Hwang Jung-Wook,KRX, Device for displaying remaining battery capacity.
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Cho,Sung Mun, Digital device with rechargeable battery and recharging method thereof.
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Koo Jae-Seung,KRX, Electric car battery charging device and method.
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King Robert Dean (Schenectady NY), Intelligent battery charger for electric drive system batteries.
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Nishimura, Etsuko; Nishimura, Katsunori; Tanaka, Akihide, Lithium-ion secondary battery system.
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Carton Jean-Luc,FRX ; Morin Christophe,FRX ; Perelle Michel,FRX ; Equoy Regis,FRX, Measuring circuit for a system of electrical modules connected in series.
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Cho, Jae-Hun; Lee, Min-Woo; Cho, Sung-Dae; Kim, Yong-Deok, Method for displaying battery residual quantity in portable terminal having self-luminescence display and apparatus therefor.
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Toya Shoichi,JPX, Method of controlling charging and discharging.
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Toya Shoichi,JPX, Method of controlling charging and discharging.
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Sung-bin Lim KR, Method of generating data for use in monitoring and controlling charge and discharge status of secondary battery.
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Yoo, Chang-hyun, Method of precisely estimating effective full-charge capacity of secondary battery.
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Lee Chang-Hum,KRX, Monitoring technique for accurately determining residual capacity of a battery.
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Moffatt W. Keith ; Bauscher Billy J. ; Zwicky ; Jr. Richard Alan, Portable battery powered crimper.
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Layman Douglas C. ; Smith Oliver J., Power management system.
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Sasaki,Taichi; Hogari,Masaki, Remaining capacity calculation method for secondary battery, and battery pack.
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Battery residual capacity displaying system with discharged electrical quantity computation section 원문보기

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Battery residual capacity displaying system with discharged electrical quantity computation section 원문보기

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