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:
Sep. 15, 2020
Filed:
Nov. 30, 2018
Ntn Corporation, Osaka, JP;
Hiroyuki Yamada, Iwata, JP;
NTN CORPORATION, Osaka, JP;
Abstract
The secondary battery degradation determination device includes: a plurality of voltage sensors connected to respective batteries; a measurement current application device configured to apply a measurement current including an AC component to each battery group; and a controller. A sensor wireless communicator configured to wirelessly transmit a measurement value of a voltage of the AC component is provided to each voltage sensor. One current sensor is provided for a parallel-connection assembly of the battery groups. The controller is configured to receive the measurement value transmitted by the sensor wireless communicator, calculate an internal resistance of each battery by using the measurement value and a detection value of the current sensor, and determine degradation of the battery on the basis of the internal resistance.