Battery power circuit and automobile battery power circuit

• US 6,989,653 B2
• Filed: 05/09/2003
• Issued: 01/24/2006
• Est. Priority Date: 05/09/2003
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Iwata, Akihiko, Kikunaga, Toshiyuki
• Primary Examiner(s): TIBBITS, PIA FLORENCE
• Application Number:
  US10/434,281
• Publication Number:
  US 20040222771A1
• Time in Patent Office: 991 Days
• Field of Search: 320/134, 320/128, 320/132, 320/136, 307/10.1, 307/18, 307/29, 307/38, 307/43
• US Class Current: 320/134
• CPC Class Codes: F02N 11/0866 comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: F02N 11/087 Details of the switching means in starting circuits, e.g. relays or electronic switches
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: H02M 3/158 including plural semiconductor devices as final control devices for a single load
• CPC Class Codes: H02M 3/1582 Buck-boost converters H02M3/1584 takes precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A load is connected to a first battery group. The first battery group and a second battery group are connected in series to each other. A bidirectional DC/DC converter for electric power migration between the first battery group and the second battery group is provided.

Claims

1. An automobile battery power circuit comprising:

a battery power circuit;

an electric motor whose power is transmitted to an engine; and

a power conversion circuit connected between a series body of said first battery group and said second battery group and said electric motor, wherein

said electric motor generates electricity in response to said power from said engine and charges said series body of said battery groups through said power conversion circuit,

wherein, said battery power circuit comprises;

a first battery group connected to a load;

a second battery group connected in series with said first battery group; and

a bidirectional DC/DC converter for electric power migration between said first battery group and said second battery group.

2. The automobile battery power circuit according to claim 1, wherein

said electric motor restarts said engine which is stopped in accordance with temporary stop during driving.

3. The automobile battery power circuit according to claim 2, wherein

a cell motor for starting said engine only by a key operation at an early stage of start of driving is connected as a load.

4. The automobile battery power circuit according to claim 2, wherein

electric power is supplied from said first battery group to said second battery group through said bidirectional DC/DC converter while said engine is restarted by said electric motor.

5. The automobile battery power circuit according to claim 3, wherein

electric power is supplied from said series body of said first battery group and said second battery group to said electric motor through said power conversion circuit while said engine is started by said cell motor.

6. The automobile battery power circuit according to claim 1, wherein said power conversion circuit is connected to opposite ends of the series of said first battery group and said second battery group.

7. The automobile battery power circuit according to claim 1, wherein said second battery group is constituted by capacitors.

8. The automobile battery power circuit according to claim 1, wherein said cell motor starts said engine via a key switch.