Battery charge condition meter - uses mathematical model and tests to allow for battery ageing and temp.

摘要

The theoretical parameters of a rechargeable battery are computed as a mathematical mode for the start of the charge determination process (1) and adjusted for the particular application or battery type (2). Actual measurement (3) of terminal voltage (Vb) the charging current (IC) and the discharge current (Id) and the battery temp. are recorded. The actual energy stored (SOC) together with the cumulative time-current summation for both the charge and discharge results are then calculated (4). Having determined the battery charge condition as high or low (5) the data are then used to either direct feedback to step 3 or is adjusted (5A) and fed back to step 3. Be repeating the process the accuracy of predicting the charge condition of any battery is improved.