Onboard battery management device

Details Onboard battery management device Onboard battery management device

2011-03-01

2011-03-01

Tso, Edward (Department: 2858)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C324S426000, C320S132000

Reexamination Certificate

active

07898263

ABSTRACT:
A battery management device is provided for accurately measuring in a simple manner the internal resistance (reciprocal of conductance) of a battery that serves as the determination reference of the deterioration level of a battery without the application of an AC voltage to the battery while the battery remains onboard, and determining and displaying the deterioration level of the onboard battery. The onboard battery management device has sensors2and3for measuring terminal voltage and current of an onboard battery1; a computation processor6for determining the deterioration level of a battery (as well as for calculating and determining the internal resistance on the basis of the measured value); and a display unit7of the battery state, wherein the internal resistance is determined based on an AC voltage component and an AC electric current component that are calculated by performing differential processing or subtractive processing on the voltage value and electric current value of the onboard battery during engine operation measured without the application of an AC signal from a sensor terminal; and the DC component, the low-frequency component, and the high-frequency component are removed using a filter circuit to determine the deterioration level.

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English translation of JP 58-144278, Inventor: Inoue.et.al, 1982.
Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 39379/1982 (Laid-open No. 144278/1983)(Nissan Motor Co., Ltd) Sep. 28, 1983.

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