TEST SYSTEM AND METHOD OF TESTING BATTERY PACK

• US 20120221266A1
• Filed: 02/27/2012
• Published: 08/30/2012
• Est. Priority Date: 02/28/2011
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kuroda, Kazuto, Kosugi, Shinichiro, Shibuya, Nobuo
• Application Number:
  US13/406,167
• Publication Number:
  US 20120221266A1
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: G01R 31/3865 related to manufacture, e.g. testing after manufacture
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10

Abstract

A test system to test a battery pack includes a power supply, a high-frequency-voltage application unit, a splitter, a first coupling capacitor, a second coupling capacitor, a ground, and a data logger. The power supply supplies power to a battery management unit of the battery pack. The splitter includes an input terminal, and first and second output terminals. The high-frequency-voltage application unit outputs a high-frequency voltage to the input terminal of the splitter. The first coupling capacitor is provided between the first output terminal and a positive-electrode terminal of the battery pack. The second coupling capacitor is provided between the second output terminal and a negative-electrode terminal of the battery pack. An earth terminal of the high-frequency-voltage application unit and one of power-supply input terminal of the battery pack are connected to the ground. The data logger records data outputted from a data-output terminal of the battery management unit.

Claims

1. A test system configured to test a battery pack including:

an assembled battery including a plurality of secondary cells;

a positive-electrode terminal electrically connected to a high-potential side of the assembled battery;

a negative-electrode terminal electrically connected to a low-potential side of the assembled battery;

a monitoring circuit configured to detect voltages of the plurality of secondary cells;

a battery management unit configured to receive and output voltage data outputted from the monitoring circuit;

a data-output terminal configured to output, to an outside of the battery pack, the voltage data outputted from the battery management unit;

a first power-supply input terminal electrically connected to a positive electrode of a power supply; and

a second power-supply input terminal electrically connected to a negative electrode of the power supply, the test system comprising;

the power supply;

a high-frequency-voltage application unit including an output terminal and an earth terminal, and configured to output high-frequency voltage through the output terminal and the earth terminal;

a splitter including an input terminal into which the high-frequency voltage outputted from the output terminal is inputted, and including a first output terminal and a second output terminal through which the high-frequency voltage inputted into the input terminal is outputted;

a first coupling capacitor provided between the first output terminal and the positive-electrode terminal;

a second coupling capacitor provided between the second output terminal and the negative-electrode terminal;

a ground to which the earth terminal and the second power-supply input terminal are connected; and

a data logger configured to record data outputted from the data-output terminal.

2. The test system according to claim 1 further comprising a capacitor connected between the positive-electrode terminal and the negative-electrode terminal.

4. The test system according to any one of claims 1 and 3 further comprising:

a first filter inserted in a wiring to be used in communications between the battery pack and the data logger, and configured to block a high-frequency current; and

a second filter inserted in a wiring to be used to supply power from the power supply to the battery pack, and configured to block a high-frequency current.

5. The test system according to any one of claims 1 and 3, wherein the monitoring circuit detects the voltage of each of the plurality of secondary cells.

3. A test system configured to test a battery pack including:

an assembled battery including a plurality of secondary cells;

a positive-electrode terminal electrically connected to a high-potential side of the assembled battery;

a negative-electrode terminal electrically connected to a low-potential side of the assembled battery;

a monitoring circuit configured to detect voltages of the plurality of secondary cells;

a battery management unit configured to receive and output voltage data outputted from the monitoring circuit;

a data-output terminal configured to output, to an outside of the battery pack, the voltage data outputted from the battery management unit;

a first power-supply input terminal electrically connected to a positive electrode of a power supply; and

a second power-supply input terminal electrically connected to a negative electrode of the power supply, the test system comprising;

the power supply;

a high-frequency-voltage application unit including an output terminal and an earth terminal, and configured to output high-frequency voltage through the output terminal and the earth terminal;

a first coupling capacitor provided between the output terminal and the positive-electrode terminal;

a second coupling capacitor provided between the earth terminal and the negative-electrode terminal;

a ground to which the second power-supply input terminal is connected; and

a data logger configured to record data outputted from the data-output terminal.

6. A method of testing a battery pack comprising:

forming a route through which a noise current flows by connecting an output terminal of a high-frequency-voltage application unit and a positive-electrode terminal of a battery pack to each other via a first coupling capacitor, by connecting an earth terminal of the high-frequency-voltage application unit and a negative-electrode terminal of the battery pack to each other via a second coupling capacitor, by connecting a first power-supply input terminal of the battery pack and a positive electrode of the power supply to each other, by connecting a second power-supply input terminal of the battery pack and a negative electrode of the power supply to each other, by connecting the second power-supply input terminal and the earth terminal of the high-frequency-voltage application unit to a ground, and by connecting a capacitor between the positive-electrode terminal and the negative-electrode terminal;

connecting a data-output terminal of the battery pack and a data logger to each other by means of a communication line;

outputting a high-frequency voltage to the output terminal and the earth terminal of the high-frequency-voltage application unit for a predetermined period of time; and

recording, in the data logger, voltage data of secondary cells outputted from the battery pack during the predetermined period of time.

7. A method of testing a battery pack comprising:

forming a route through which a noise current flows by connecting an output terminal of a high-frequency-voltage application unit and a positive-electrode terminal of a battery pack to each other via a first coupling capacitor, by connecting an earth terminal of the high-frequency-voltage application unit and a negative-electrode terminal of the battery pack to each other via a second coupling capacitor, by connecting a first power-supply input terminal of the battery pack and a positive electrode of the power supply to each other, by connecting a second power-supply input terminal of the battery pack and a negative electrode of the power supply to each other, and by connecting the second power-supply input terminal to a ground;

connecting a data-output terminal of the battery pack and a data logger to each other by means of a communication line;

outputting a high-frequency voltage to the output terminal and the earth terminal of the high-frequency-voltage application unit for a predetermined period of time; and

recording, in the data logger, voltage data of secondary cells outputted from the battery pack during the predetermined period of time.