Battery apparatus for controlling plural batteries and control method of plural batteries

• US 8,283,892 B2
• Filed: 08/20/2007
• Issued: 10/09/2012
• Est. Priority Date: 08/29/2001
• Status: Expired due to Term

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Shin-Kobe Electric Machinery Company Limited (Resonac Holdings Corp.)
• Inventors: Miyazaki, Hideki, Emori, Akihiko, Kudo, Akihiko, Kai, Tsuyoshi
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US11/892,174
• Publication Number:
  US 20080079395A1
• Time in Patent Office: 1,877 Days
• Field of Search: 320/116, 320/163, 320/132, 320/134, 324/434
• US Class Current: 320/134
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 58/19 Switching between serial connection and parallel connection of battery modules
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• 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 10/052 Li-accumulators
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2010/4278 Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• 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: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• 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: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles

Abstract

Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.

Claims

1. A system configured to control a plurality of battery modules, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery modules, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells of the battery modules;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal; and

wherein the plurality of voltage detecting terminals and a plurality of charge state adjustment terminals are disposed alternately in each of the plurality of integrated circuits; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.

2. The system according to claim 1, the integrated circuit further comprising a driver circuit configured to control a state of charge of the plurality of battery cells.

3. The system according to claim 1, the integrated circuits further comprising a terminal to supply power to a photo-coupler.

4. The system according to claim 1, wherein the input signal circuit comprises a level shifter circuit, wherein the level shifter circuit converts a voltage level of a signal inputted via the signal input terminal into a voltage level of the ground terminal.

5. The system according to claim 1, wherein the output signal circuit comprises a step-down circuit, wherein the step-down circuit steps down a voltage of a signal outputted via the output terminal.

6. The system according to claim 1, the voltage detection circuit comprising at least one multiplexer and at least one analog-to-digital converter.

7. The system according to claim 1, the integrated circuit further comprising an overcharge and discharge detecting circuit.

8. The system according to claim 1, further comprising a reference power supply terminal for obtaining a voltage to be supplied to the reference power supply from the battery cell.

9. The system according to claim 8, wherein the reference power supply steps down the voltage supplied from the battery cell between the reference power supply terminal and the ground terminal and applies the voltage to at least an analog-to-digital converter.

10. A system configured to control a plurality of battery modules, having a plurality of battery cells, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery cells, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal,

wherein a voltage of each of the respective integrated circuits is generated based on a predetermined number of battery cells, wherein the predetermined number of battery cells is the same for each of the plurality of integrated circuits;

wherein the plurality of voltage detecting terminals and a plurality of charge state adjustment terminals are disposed alternately in each of the plurality of integrated circuits; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.

11. The system according to claim 10, wherein each of the respective integrated circuits generates a reference voltage based on a total voltage produced by the corresponding plurality of battery cells.

12. The system according to claim 11, wherein the output signal circuit comprises a step-down circuit, wherein the step-down circuit steps down a voltage value of a signal outputted via the output terminal.

13. A system configured to control a plurality of battery modules, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery modules, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells of the battery modules;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal; and

wherein each of said integrated circuits has plural resistors and plural charge state adjustment terminals disposed between voltage detection terminals electrically coupled to positive electrode sides of lithium-ion battery cells and voltage detection terminals electrically coupled to negative electrode sides of the lithium-ion battery cells, for controlling adjustment of the charge states of the lithium-ion battery cells; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.

14. A system configured to control a plurality of battery modules, having a plurality of battery cells, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery cells, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal,

wherein a voltage of each of the respective integrated circuits is generated based on a predetermined number of battery cells, wherein the predetermined number of battery cells is the same for each of the plurality of integrated circuits;

wherein each of said integrated circuits has plural resistors and plural charge state adjustment terminals disposed between voltage detection terminals electrically coupled to positive electrode sides of lithium-ion battery cells and voltage detection terminals electrically coupled to negative electrode sides of the lithium-ion battery cells, for controlling adjustment of the charge states of the lithium-ion battery cells; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.

15. A system configured to control a plurality of battery modules, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery modules, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells of the battery modules;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal; and

wherein each of said integrated circuits has plural resistors and plural charge state adjustment terminals disposed between voltage detection terminals electrically coupled to positive electrode sides of lithium-ion battery cells and voltage detection terminals electrically coupled to negative electrode sides of the lithium-ion battery cells, for controlling adjustment of the charge states of the lithium-ion battery cells, and wherein said system has plural pairs of terminals disposed in a coupling order of the lithium-ion battery cells, and wherein each of said pairs of terminals includes a voltage detection terminal on a positive electrode side, a voltage detection terminal on a negative electrode side, and a charge state adjustment terminal associated with a lithium-ion battery cell; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.

16. A system configured to control a plurality of battery modules, having a plurality of battery cells, the system comprising:

a plurality of integrated circuits configured to connect to the plurality of battery cells, the integrated circuits being serially connected in an electrically non-isolated manner, the integrated circuits comprising;

a plurality of voltage detecting terminals for connecting to a plurality of battery cells;

a voltage detection circuit for determining the voltage of the plurality of battery cells;

a plurality of signal input terminals connected to an input signal circuit;

a plurality of signal output terminals connected to an output signal circuit;

a reference power supply; and

a ground terminal,

wherein a voltage of each of the respective integrated circuits is generated based on a predetermined number of battery cells, wherein the predetermined number of battery cells is the same for each of the plurality of integrated circuits;

wherein each of said integrated circuits has plural resistors and plural charge state adjustment terminals disposed between voltage detection terminals electrically coupled to positive electrode sides of lithium-ion battery cells and voltage detection terminals electrically coupled to negative electrode sides of the lithium-ion battery cells, for controlling adjustment of the charge states of the lithium-ion battery cells, and wherein said system has plural pairs of terminals disposed in a coupling order of the lithium-ion battery cells, and wherein each of said pairs of terminals includes a voltage detection terminal on a positive electrode side, a voltage detection terminal on a negative electrode side, and a charge state adjustment terminal associated with a lithium-ion battery cell; and

wherein the voltage detecting terminals and the charge state adjustment terminals are located at peripheries of the respective integrated circuits, and protrude outwardly from the respective integrated circuits.