Battery control device and electricity storage device

• US 9,419,447 B2
• Filed: 02/03/2015
• Issued: 08/16/2016
• Est. Priority Date: 06/04/2010
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Machida, Akihiro, Yamauchi, Tatsumi, Kudo, Akihiko
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US14/612,448
• Publication Number:
  US 20150145481A1
• Time in Patent Office: 560 Days
• Field of Search: 320/116
• US Class Current: 1/1
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/421 Speed
• 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 2270/20 Inrush current reduction, i.e. avoiding high currents when connecting the battery
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 58/22 Balancing the charge of battery modules
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/482 : for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H02J 2310/48 : for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00 : Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0013 : acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0016 : using shunting, discharge or bypass circuits
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A battery control device that controls a battery module in which a plurality of cell groups, in each of which a plurality of cells are connected in series, are connected in series or series-parallel, includes: a plurality of cell controller ICs that control each of the plurality of cell groups; and one or more connectors that are provided for connecting the plurality of cell controller ICs to the battery module; wherein: the plurality of cell controller ICs include first and second cell controller ICs that are provided in sequence, so as to control two or more of the cell groups that are connected in series; and an auxiliary connection member (a pin) is provided for connecting GND terminal side wiring of the first cell controller IC and VCC terminal side wiring of the second cell controller IC together, externally to the battery control device.

Claims

1. A battery control device that is used for a battery module including M cells, where M is a positive number, the battery control device comprising:

a plurality of integrated circuits that are each provided in correspondence to each of a plurality of cell groups, the M cells being divided into the plurality of cell groups each including N cells, where N is a positive number, that are electrically connected in series, where N<

M, and the M cells being electrically connected in series or in series-parallel; and

a connector configured to electrically connect the M cells and the plurality of integrated circuits, wherein;

the plurality of integrated circuits each include a VCC terminal electrically connected to a positive electrode side of a highest potential cell of a corresponding cell group and a GND terminal electrically connected to a negative electrode side of a lowest potential cell of a corresponding cell group;

the VCC terminal and the GND terminal of each integrated circuit are electrically connected with each other via a first path including a capacitor;

the GND terminal of a first integrated circuit corresponding to a higher potential order cell group and the VCC terminal of a second integrated circuit corresponding to a lower potential order cell group are electrically connected with each other via a second path between the first and second integrated circuits corresponding to the cell groups electrically connected in series; and

and the second path is formed via the connector through the outside of the battery control device when the plurality of integrated circuits and the M cells are electrically connected by the connector.

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

an electronic component for current limitation is electrically connected between the GND terminal of the first integrated circuit corresponding to the higher potential order cell group and the VCC terminal of the second integrated circuit corresponding to the lower potential order cell group.

3. An electricity storage device, comprising:

a battery control device according to claim 1; and

a battery module including the M cells.

4. A vehicle which can be driven electrically, comprising:

an electricity storage device according to claim 3; and

an electric motor for propulsion drive of the vehicle based on electric power of the electricity storage device.