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1. 发明专利

JP2004271447A Internal resistance detector, degradation judging device, internal resistance detection method and degradation judging method for secondary battery 有权
公开(公告)号：JP2004271447A
公开(公告)日：2004-09-30
申请号：JP2003065206
申请日：2003-03-11
申请人： Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社日本自動車部品総合研究所
发明人： SAKAI SHOJI , SAKAKIBARA TERUHIKO , OKAMOTO TOSHIRO
IPC分类号： G01R31/36 , B60L11/18 , H01M10/48
CPC分类号： Y02T10/7005
摘要： PROBLEM TO BE SOLVED: To exactly calculate internal resistance value of a secondary battery by considering a memory effect.
SOLUTION: A battery unit 2400 comprises a battery pack 2410 consisting of a plurality of battery modules 2412, a current detection circuit 2414 for detecting the current value of the battery module 2412 during charging, a voltage detection circuit 2416 for detecting the voltage value of every battery module 2412 during current measurement, and a battery ECU 2422 connected with the current detection circuit 2414 and the voltage detection circuit 2416 and calculating the internal resistance value of every battery module 2412 based on the detected current value and voltage value.
COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2004271445A Internal resistance detector and degradation judging device, internal resistance detection method and degradation judging method for secondary battery 有权
公开(公告)号：JP2004271445A
公开(公告)日：2004-09-30
申请号：JP2003065158
申请日：2003-03-11
申请人： Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社日本自動車部品総合研究所
发明人： SAKAKIBARA TERUHIKO , SAKAI SHOJI , OKAMOTO TOSHIRO
IPC分类号： G01R31/36 , B60L3/00 , B60L11/14 , B60W10/26 , B60W20/00 , H01M10/48 , B60K6/04
CPC分类号： G01R31/3679 , G01R31/3662
摘要： PROBLEM TO BE SOLVED: To exactly calculate the internal resistance value of a secondary battery by considering a polarization voltage. SOLUTION: A battery unit 2400 comprises a battery pack 2410 consisting of a battery module 2412, a current detection circuit 2414 for detecting the current value of the battery module 2412 during charging, a voltage detection circuit 2416 for detecting the voltage value at every battery module 2412 during current measurement, and a battery ECU 2422. The ECU 2422 comprises a circuit for calculating the time variation rate of the current value based on the signal received from the current detection circuit 2414 and the voltage detection circuit 2416, and a circuit for calculating the internal resistance of the battery module 2412 based on the detected current value and voltage value when a variation toward a current value 0 is detected based on the time variation rate. COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2005261130A Apparatus for measuring current of battery 有权
标题翻译：用于测量电池电流的装置
公开(公告)号：JP2005261130A
公开(公告)日：2005-09-22
申请号：JP2004071047
申请日：2004-03-12
申请人： Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社日本自動車部品総合研究所
发明人： SAKAKIBARA TERUHIKO , SAKAI SHOJI , OKAMOTO TOSHIRO
IPC分类号： G01R19/00 , H01M10/48 , H02J7/00 , H02J7/10
CPC分类号： Y02E60/12
摘要： PROBLEM TO BE SOLVED: To accurately calculate measurement, errors of a current sensor and to improve the detection accuracy of currents.
SOLUTION: The current sensor 13 measures a charging current and a discharging current of a battery pack 11. A CPU 17 calculates an offset error of the current sensor 13, based on a capacity difference between a battery capacity found from an accumulated value of the current measured by the current sensor 13 and a battery capacity found from an open circuit voltage of the battery pack 11, and also calculates a gain error of the current sensor 13, based on a corrected capacity difference as a difference between a corrected battery capacity, found by correcting the accumulated value of the current measured by the current sensor 13 with accumulation due to the offset errors and the battery capacity found from the open circuit voltage.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：准确计算电流传感器的测量误差，提高电流检测精度。电流传感器13测量电池组11的充电电流和放电电流。CPU 17基于从累积值发现的电池容量之间的容量差来计算电流传感器13的偏移误差由电流传感器13测量的电流和从电池组11的开路电压求出的电池容量，并且还基于经校正的电容差计算电流传感器13的增益误差，作为校正电池通过由于由开路电压发现的偏移误差和电池容量的积累校正由电流传感器13测量的电流的累积值而发现的容量。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2004056945A Charge state detecting device, its program and charge state detecting method, and charge/discharge control device 有权
公开(公告)号：JP2004056945A
公开(公告)日：2004-02-19
申请号：JP2002212828
申请日：2002-07-22
申请人： Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社日本自動車部品総合研究所
发明人： SAKAKIBARA TERUHIKO , SAKAI SHOJI , NAKAYAMA YOSHIYUKI
IPC分类号： G01R31/36 , H01M10/48 , H02J7/00 , H02J7/10
CPC分类号： G01R31/3662 , G01R31/3648 , H02J7/0047
摘要： PROBLEM TO BE SOLVED: To further improve the detection accuracy of the full charge of a secondary battery, and to further surely prevent overcharge.
SOLUTION: The fullharge is determined when internal resistance is lowered exceeding a prescribed value, when the ratio of the internal resistance to the charge capacity of the secondary battery reaches negative from positive. As the characteristic of the internal resistance R against the charge capacity Ah, timing when the peak of the resistance appears is early compared with the characteristic of a similar voltage Vb between terminals, and the peak appears well in advance even if compared with timing when the battery actually reaches the full charge. Therefore, when the peak of the internal resistance R appears, the timing when the internal resistance is lowered exceeding the prescribed value is determined as the full charge on the basis of a time when a rate of change ΔR/ΔAh, wherein ΔR is a volume of change of the internal resistance relative to the charge capacity ΔAh when the rate reaches zero, thus further improving the detection accuracy of the full charge. By controlling charge to the secondary battery using the detected result, the overcharge is further surely prevented.
COPYRIGHT: (C)2004,JPO

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