Battery control apparatus for battery carried by hybrid vehicle

• US 6,225,784 B1
• Filed: 08/24/2000
• Issued: 05/01/2001
• Est. Priority Date: 08/27/1999
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Fujimura, Akira, Kinoshita, Naoki, Kawarada, Nobuyuki
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/644,578
• Time in Patent Office: 250 Days
• Field of Search: 320/104, 320/123, 320/127, 320/128, 320/132, 320/137, 320/150, 320/DIG. 21
• US Class Current: 320/132
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60K 6/54 Transmission for changing ratio
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/374 with means for correcting the measurement for temperature or ageing
• CPC Class Codes: G01R 31/3828 using current integration
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y10S 903/903 having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/917 with transmission for changing gear ratio

Abstract

The battery control apparatus of the present invention is provided for a hybrid vehicle with a combustion engine for outputting driving force, an electric motor for generating a force for assisting the output from the engine, and a power storage unit (battery) for supplying power to the motor and for storing energy regenerated by the motor acting as a generator when the assisting force is not required. The battery control apparatus comprises: a remaining battery charge calculator for calculating remaining battery charge; a battery temperature measuring device (temperature sensor) for measuring the temperature of the battery; a charging permitting device for permitting charging when the remaining battery charge, which was calculated by the remaining battery charge calculator, is equal to or below a predetermined value; and a charging/discharging controller for setting the predetermined value, based on the temperature of the battery measured by the battery temperature measuring device.

Claims

1. A battery control apparatus for a hybrid vehicle with a combustion engine for outputting driving force, an electric motor for generating a force for assisting the output from the engine, and a power storage unit for supplying power to the motor and for storing energy regenerated by the motor acting as a generator when the assisting force is not required, said battery control apparatus comprising:

a remaining battery charge calculator for calculating remaining battery charge;

a battery temperature measuring device for measuring the temperature of the battery;

a charging permitting device for permitting charging when the remaining battery charge, which was calculated by the remaining battery charge calculator, is equal to or below a predetermined value; and

a charging/discharging controller for setting the predetermined value, based on the temperature of the battery measured by the battery temperature measuring device.

3. A battery control apparatus according to any one of claims 1 and 2, wherein the charging/discharging controller sets a charging electric current depending on the remaining battery charge calculated by the remaining battery charge calculator.

2. A battery control apparatus for a hybrid vehicle with a combustion engine for outputting driving force, an electric motor for generating a force for assisting the output from the engine, and a power storage unit for supplying power to the motor and for storing energy regenerated by the motor acting as a generator when the assisting force is not required, said battery control apparatus comprising:

a remaining battery charge calculator for calculating remaining battery charge;

a battery temperature measuring device for measuring the temperatures of a plurality of battery modules constituting the battery and for calculating a difference between the temperatures;

a charging permitting device for permitting charging when the remaining battery charge, which was calculated by the remaining battery charge calculator, is equal to or below a predetermined value; and

a charging/discharging controller for setting the predetermined value, based on the difference between the temperatures measured by the battery temperature measuring device.