Method and device for testing a traction battery of an electric vehicle

Patent metadata

Field	Value
Publication number	US-2016288648-A1
Application number	US-201415038123-A
Country	US
Kind code	A1
Filing date	Nov 24, 2014
Priority date	Nov 29, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

For testing a traction battery ( 5 ) of an electric vehicle ( 1 ), which battery is both chargeable and dischargeable via a charging-discharging interface ( 2 ), a control command for initiating a discharging process of the traction battery ( 5 ) is generated. The discharging process is monitored by a testing apparatus ( 10 ). At least one characteristic quantity of the traction battery ( 5 ) is determined depending on the monitored discharging process.

First claim

1 . A method for testing a traction battery of an electric vehicle which battery is both chargeable and dischargeable via a charging-discharging interface, the method comprising:
electrically coupling a mobile testing apparatus to the traction battery via the charging-discharging interface; generating a control command in the mobile testing apparatus for initiating a discharging process of the traction battery; monitoring the discharging process of the traction battery, and determining at least one characteristic quantity of the traction battery depending on the monitored discharging process.

2 . The method according to claim 1 , further including generating a supply voltage from a supply circuit of the testing apparatus for at least one element of the testing apparatus from an energy flow which, during the discharging process, flows via the charging-discharging interface to the testing apparatus.

3 . The method according to claim 1 , further including transmitting the control command via the charging-discharging interface to the electric vehicle.

4 . The method according to claim 3 , further including generating the control command according to a V2G protocol.

5 . The method according to claim 4 , further including initiating with the control command in a V2G network operation a feeding of energy from the traction battery into a building network or an energy network.

6 . The method according to claim 1 , further including reserving the control command for testing the traction battery.

7 . The method according to claim 1 , further including transmitting the control command via an interface of the electric vehicle to the electric vehicle, which interface is different from the charging-discharging-interface.

8 . The method according to claim 1 , further including feeding at least part of the energy stored in the traction battery into a building network or an energy network during the discharging process.

9 . The method according to claim 1 , wherein the step of monitoring the discharging process comprises detecting at least one of an electrical charge and electrical energy discharged from the traction battery during the discharging process.

10 . The method according to claim 1 , wherein the step of determining the at least one characteristic quantity of the traction battery comprises determining a capacity of the traction battery depending on at least one of the electrical charge and the electrical energy discharged from the traction battery during the discharging process.

11 . The method according to claim 1 , wherein the step of determining at least one characteristic quantity of the traction battery comprises determining a system efficiency depending on at least one of the electrical charge and the electrical energy discharged from the traction battery during the discharging process.

12 . The method according to claim 1 , further comprising:
initiating a charging process of the traction battery; and monitoring the charging process of the traction battery; and determining the at least one characteristic quantity of the traction battery is depending on the monitored charging process and the monitored discharging process.

13 . The method according to claim 1 , further including storing in the testing apparatus at least one predefined or user-configurable loading cycle for the discharging process.

14 . Apparatus for testing a traction battery of an electric vehicle, which battery is both chargeable and dischargeable via a charging-discharging interface, comprising:
a mobile traction battery tester including an interface for outputting a control command for initiating a discharging process of the traction battery; and a monitoring unit associated with the mobile traction battery tester, the monitoring unit couplable to the charging-discharging interface and configured to monitor the discharging process of the traction battery in response to the control command and to determine at least one characteristic quantity of the traction battery depending on the monitored discharging process.

15 . The apparatus according to claim 14 , further comprising:
a feedback circuit for feeding energy back into an electronic network, which circuit is integrated in the mobile traction battery tester and comprises: a converter, and a supply circuit which is adapted to generate a supply voltage for at least one element of the mobile traction battery tester from an energy flow which during the discharging process flows via the charging-discharging interface to the mobile traction battery tester.

Assignees

• Omicron Electronics Gmbh

Inventors

• Klapper Ulrich
• Janke Oliver

Classifications

• Y04S10/126

  the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G] · CPC title

• H01M10/448

  End of discharge regulating measures · CPC title

• B60L2240/547

  Voltage · CPC title

• B60L2240/549

  Current · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title