利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN103454501B 内部电阻推定装置以及内部电阻推定方法 有权

内部电阻推定装置以及内部电阻推定方法
摘要：
本发明的内部电阻推定装置对蓄电元件的内部电阻进行推定。电池包包含：对流过单电池的电流值(I)进行测定的电流测量部；对作为单电池的端子间电压的电压值(V)进行测定的电池电压测量部；和CPU。CPU在单电池的充电期间，根据在电流值(I)的时间变化率(ΔI)被限制为固定的斜坡区域(LA)经过期间测定出的电流值(I)和电压值(V)来推定单电池的内部电阻。在该电池包中，利用在斜坡区域LA经过期间电流值(I)的时间变化率(ΔI)被限制为固定，能够在单电池的充电期间中，高精度地推定单电池的内部电阻。
摘要（英）：

An objective is to estimate an internal resistance of an electric storage device. A battery pack includes a current measurement portion, a voltage measurement portion, and a CPU. The current measurement portion is configured to measure a current value I of a current flowing through a cell. The voltage measurement portion is configured to measure a voltage value V of a voltage across the cell, which is a voltage in charge time. The CPU is configured to estimate an internal resistance of the cell based on the current value I and the voltage value V measured in a ramp region LA of the charge time in which a time variation ”I in current value I is maintained constant. In the battery pack, the internal resistance of the cell can be accurately estimated during the charge time because the time variation ”I in current value I is maintained constant in the ramp region LA.

公开/授权文献
0/0