The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2011
Filed:
Mar. 28, 2006
Koroku Ishida, Sado, JP;
Sumio Homma, Sado, JP;
Shigeki Homma, Legal Representative, Sado, JP;
Toshiko Homma, Legal Representative, Sado, JP;
Futao Kaneko, Niigata, JP;
Takahiro Kawakami, Niigata, JP;
Koroku Ishida, Sado, JP;
Sumio Homma, Sado, JP;
Shigeki Homma, legal representative, Sado, JP;
Toshiko Homma, legal representative, Sado, JP;
Futao Kaneko, Niigata, JP;
Takahiro Kawakami, Niigata, JP;
PCN Corporation, Niigata, JP;
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 sensorsandfor measuring terminal voltage and current of an onboard battery; a computation processorfor 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 unitof 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.