SECONDARY BATTERY STATUS DETECTION DEVICE AND SECONDARY BATTERY STATUS DETECTION METHOD

• US 20160103182A1
• Filed: 12/17/2015
• Published: 04/14/2016
• Est. Priority Date: 06/18/2013
• Status: Active Grant

• Current Assignee: Furukawa Automotive Systems Incorporated (Furukawa Electric Company Limited), Furukawa Electric Company Limited
• Original Assignee: Furukawa Automotive Systems Incorporated (Furukawa Electric Company Limited), Furukawa Electric Company Limited
• Inventors: SATO, Etsuzo, ISHIHARA, Hideaki
• Granted Patent: US 10,247,784 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 31/3828 using current integration
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

[Object] To accurately detect a state of a secondary battery when the secondary battery is mounted on a vehicle.

[Organization] In a secondary battery state detecting device 1 detecting a state of a secondary battery 14 which is mounted on a vehicle, a first operation mode being an initial operation mode in a case newly connected to the secondary battery and a second operation mode being a normal operation mode after the first operation mode are included, and an initial state detecting unit (control part 10) which makes the operation mode transit to the first operation mode, and detects an initial state of the secondary battery with reference to a terminal voltage of the secondary battery in a case connected to the secondary battery; and a normal state detecting unit (control part 10) which makes the operation mode transit to the second operation mode, and detects the state of the secondary battery at a normal time based on the terminal voltage and a charge/discharge current of the secondary battery at a predetermined timing after the state of the secondary battery is detected by the initial state detecting unit are included.

Claims

1. A secondary battery state detecting device detecting a state of a secondary battery mounted on a vehicle,

wherein a first operation mode being an initial operation mode in a case newly connected to the secondary battery, and a second operation mode being a normal operation mode after the first operation mode are included,

the secondary battery state detecting device, comprising:

an initial state detecting unit which makes the operation mode transit to the first operation mode, and detects an initial state of the secondary battery with reference to a terminal voltage of the secondary battery in a case connected to the secondary battery; and

a normal state detecting unit which makes the operation mode transit to the second operation mode, and detects the state of the secondary battery at a normal time based on the terminal voltage and a charge/discharge current of the secondary battery at a predetermined timing after the state of the secondary battery is detected by the initial state detecting unit.

2. The secondary battery state detecting device according to claim 1,

wherein the normal state detecting unit is transit to the second operation mode when an ignition switch of the vehicle is turned into on state.

3. The secondary battery state detecting device according to claim 1,

wherein when the initial state of the secondary battery is judged to be not normal, the initial state detecting unit presents information indicating the state via a higher device.

4. The secondary battery state detecting device according to claim 1,

wherein the initial state detecting unit detects the state of the secondary battery in plural times, and detects the state of the secondary battery based on an average value of the plural detections.

5. The secondary battery state detecting device according to claim 1,

wherein the initial state detecting unit detects the state of the secondary battery in plural times, and detects the state of the secondary battery based on a maximum value of the plural detections.

6. A secondary battery state detecting method detecting a state of a secondary battery mounted on a vehicle,

wherein a first operation mode being an initial operation mode in a case newly connected to the secondary battery, and a second operation mode being a normal operation mode after the first operation mode are included,

the secondary battery state detecting method, comprising:

an initial state detecting step which makes the operation mode transit to the first operation mode, and detects an initial state of the secondary battery with reference to a terminal voltage of the secondary battery in a case connected to the secondary battery; and

a normal state detecting step which makes the operation mode transit to the second operation mode, and detects the state of the secondary battery at a normal time based on the terminal voltage and a charge/discharge current of the secondary battery at a predetermined timing after the state of the secondary battery is detected in the initial state detecting step.