BATTERY CONTROL DEVICE
PROBLEM TO BE SOLVED: To provide a battery control device capable of accurately obtaining a present storage capacity of a battery even in a state where a current flows, and correctly determining deterioration of the battery.SOLUTION: A battery control device 100 of the present invention estimates, i...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a battery control device capable of accurately obtaining a present storage capacity of a battery even in a state where a current flows, and correctly determining deterioration of the battery.SOLUTION: A battery control device 100 of the present invention estimates, in a state where a current flows into a battery 111, a present storage capacity Q of the battery. A current value of the battery, a battery voltage, and a battery temperature are measured at first timing and second timing when the current value falls within a range of a predetermined variation range for a predetermined period of time, and a first power storage quantity SOCv1 and second power storage quantity SOCv2 are calculated. A voltage base power storage quantity difference SOCv is calculated from the first power storage quantity and second power storage quantity, and a current base power storage quantity difference SOCi is calculated on the basis of a current integrated quantity and initial power storage capacity. A capacity degradation rate SOH and power storage quantity Q of the battery are calculated on the basis of the voltage base storage quantity difference SOCv and current base power storage quantity difference SOCi.SELECTED DRAWING: Figure 3
【課題】電流が流れている状態でも蓄電池の現在の蓄電容量を正確に求めることができ、蓄電池の劣化の判断を正しく行うことができる電池制御装置を得ること。【解決手段】本発明の電池制御装置100は、蓄電池111に電流が流れている状態で蓄電池の現在の蓄電容量Qを推定するものであって、電流値が所定期間、所定の変動幅の範囲内に収まっている第一のタイミングと第二のタイミングで蓄電池の電流値と電池電圧と電池温度を測定し、第一の蓄電量SOCv1と第二の蓄電量SOCv2を算出する。そして、第一の蓄電量と第二の蓄電量から電圧ベース蓄電量差分ΔSOCvを算出し、電流積算量と初期蓄電容量に基づいて電流ベース蓄電量差分ΔSOCiを算出する。そして、電圧ベース蓄電量差分ΔSOCvと電流ベース蓄電量差分ΔSOCiに基づいて蓄電池の容量劣化率SOHと蓄電容量Qを算出する。【選択図】図3 |
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