Battery control device

• US 10,106,037 B2
• Filed: 02/25/2016
• Issued: 10/23/2018
• Est. Priority Date: 08/28/2013
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation), Yazaki Corporation
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation), Yazaki Corporation
• Inventors: Sekizaki, Masashi, Enomoto, Michito, Shiraishi, Takeyuki, Itagaki, Takeshi
• Primary Examiner(s): Shaawat, Mussa A
• Application Number:
  US15/052,944
• Publication Number:
  US 20160167520A1
• Time in Patent Office: 971 Days
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2260/22 Standstill, e.g. zero speed
• CPC Class Codes: B60L 3/0038 relating to sensors
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60W 20/50 Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• CPC Class Codes: B60W 2400/00 Indexing codes relating to detected, measured or calculated conditions or factors
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• 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: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10S 903/907 Electricity storage, e.g. battery, capacitor

Abstract

In a self-diagnostic processing performed by a CPU, whether a vehicle is in an idle stop state is determined based on obtained vehicle operation information and engine operation information in order to perform abnormality detection processing. When an engine has stopped in a vehicle equipped with an idle stop function, electric power is supplied to electrical components of the vehicle, which means a battery supplies currents to the electrical components. Consequently, if a current measurement result obtained by measuring a current while the vehicle is stationary and an ignition is ON indicates that the measurement value is equal to or below a prescribed current value, the CPU determines that an abnormality has occurred in a measuring system.

Claims

1. A battery control device comprising a controller having a self-diagnostic function of a battery system, wherein

the controller determines that an abnormality of a measurement system has occurred, when a vehicle is operated, an engine of the vehicle is stopped, and a discharge current value of a storage battery is equal to or below a prescribed value, based on current measurement result when current measurement was performed, based on vehicle operation state information and engine operation information of the vehicle equipped with an idle stop function wherein

the battery control device is applied to a vehicle equipped with an idle stop function that causes the storage battery mounted on the vehicle to supply electric power to electrical components of the vehicle, during an idle stop state in which the vehicle stops traveling while being operated and the engine is stopped, and

the controller determines that, when the ignition is ON and the engine is stopped, the vehicle is in the idle stop state, and also determines that, when a discharge current value of the storage battery is equal to or below a prescribed value, an abnormality has occurred in a current measuring system.

2. The battery control device according to claim 1, wherein

the vehicle operation state information is information on whether an ignition is ON.

3. The battery control device according to claim 1, wherein

the engine operation information is on an engine speed.

4. The battery control device according to claim 2, wherein

the engine operation information is on an engine speed.

5. The battery control device according to claim 1, wherein

the controller determines that the abnormality of the measurement system has occurred, if the discharge current value of the storage battery is equal to or below the prescribed value, as the discharge current which should be flowing in a normal state in an idling stop state is not measured.