Status Detector for Power Supply, Power Supply, and Initial Characteristic Extracting Device for Use with Power Supply

• US 20100030499A1
• Filed: 10/13/2009
• Published: 02/04/2010
• Est. Priority Date: 03/07/2005
• Status: Active Grant

• Current Assignee: Vehicle Energy Japan, Inc.
• Original Assignee: Hitachi Vehicle Energy, Ltd.
• Inventors: Takahashi, Hirotaka, Emori, Akihiko, Kudo, Akihiko, Shida, Masami, Yamauchi, Shuko, KAWAHARA, Youhei
• Granted Patent: US 8,054,045 B2
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 3/0038 relating to sensors
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

In a status detector for a power supply, a power supply, and an initial characteristic extracting device for use with the power supply, a measuring unit obtains measured values of at least current, voltage and temperature of the electricity accumulating unit. A processing unit executes status detection of the electricity accumulating unit by using the measured values and the characteristic information of the electricity accumulating unit which is stored in a memory unit. A discrepancy detecting unit detects the presence of a discrepancy away from a theoretical value when a result of the status detection is changed over a predetermined threshold or reversed with respect to the measured values. A modifying unit modifies the characteristic information depending on the detected discrepancy.

Claims

1. A status detector for a power supply, comprising:

measuring means capable of obtaining measured values of at least current, voltage and temperature of electricity accumulating means;

memory means for storing characteristic information of said electricity accumulating means;

processing means for executing status detection of said electricity accumulating means by using the measured values and the characteristic information of said electricity accumulating means which is stored in said memory means;

discrepancy detecting means for detecting the presence of a discrepancy away from a theoretical value when a result of the status detection obtained by said processing means is changed over a predetermined threshold or reversed with respect to the measured values obtained by said measuring means; and

modifying means for modifying the characteristic information stored in said memory means depending on the discrepancy detected by said discrepancy detecting means.