# US 2015/0145481 A1 · Battery Control Device and Electricity Storage Device

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- Number: US 2015/0145481 A1
- Document ID: US20150145481A1
- Status: Published application
- Kind: A1
- Application number: 14/612,448
- Filed: 2015-02-03
- Published: 2015-05-28
- Earliest claimed: 2010-06-04
- Assignees: Hitachi Automotive Systems, Ltd.
- Applicants: Hitachi Automotive Systems, Ltd.
- Inventors: Tatsumi YAMAUCHI; Akihiro MACHIDA; Akihiko KUDO
- Web page: https://patentgrep.com/patent/US20150145481A1

## CPC

- B60L 58/22: Balancing the charge of battery modules
- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 3/0069: {relating to the isolation, e.g. ground fault or leak current}
- 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
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60L 58/12: responding to state of charge [SoC]
- B60L 58/18: of two or more battery modules
- B60L 58/20: having different nominal voltages
- H01M 10/441: {for several batteries or cells simultaneously or sequentially}
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- B60L 2200/26: Rail vehicles
- B60L 2210/10: DC to DC converters
- B60L 2210/30: AC to DC converters
- B60L 2220/14: Synchronous machines
- B60L 2240/421: Speed
- B60L 2240/545: Temperature
- B60L 2240/547: Voltage
- B60L 2240/549: Current
- B60L 2270/20: Inrush current reduction, i.e. avoiding high currents when connecting the battery
- G01R 31/3835: involving only voltage measurements
- G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
- H02J 7/54: Passive balancing, e.g. using resistors or parallel MOSFETs
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02E 60/10: Energy storage using batteries
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## 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

### Claim 1

A battery control device that is used for a battery module including M cells, 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 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
the second path is formed via the connector and is configured to be electrically conducted through the outside of the battery control device when the plurality of integrated circuits and the M cells are electrically connected by the connector.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

An electricity storage device, comprising:
a battery control device according to claim 1; and
a battery module including the M cells.

### Claim 4 (depends on 3)

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.