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CN-122029443-A - Electric vehicle maintenance device

CN122029443ACN 122029443 ACN122029443 ACN 122029443ACN-122029443-A

Abstract

The maintenance device (100) is coupled to the circuitry of the electric vehicle (102) and performs maintenance on the vehicle (102). The electrical connector (121/154) is coupled to an electrical circuit of the vehicle (102). The measurement circuit is coupled to the electrical connector. A controller (160) is coupled to the measurement circuitry, gathers information from the measurement circuitry and responsively makes diagnostic determinations. An apparatus (100) for safety testing of electrical components in an electric vehicle (102) includes a low voltage data connector (152) coupled with a data port of the electric vehicle (102). A test connector (121/154) couples a test signal to an electrical component of the vehicle (102) and a test signal source (220) having a signal generator to a voltage divider (222/224). The voltage divider (222/224) generates a test signal and a monitor signal. The measurement circuit (230) is coupled to the monitoring signal and the low voltage data connector. The measurement circuit identifies current leakage based on the monitoring signal.

Inventors

  • KEVIN I. BERTNESS

Assignees

  • 密特电子公司

Dates

Publication Date
20260512
Application Date
20241017
Priority Date
20241014

Claims (20)

  1. 1. An apparatus for safety testing of electrical components in an electric vehicle, comprising: A low voltage data connector configured to be coupled to a data port of the electric vehicle; a test connector configured to couple a test signal to an electrical component of the electric vehicle; a test signal source having a signal generator coupled to a voltage divider, wherein the voltage divider generates the test signal and a monitor signal; a measurement circuit coupled to the monitor signal, and A controller is coupled to the low voltage data connector and the measurement circuit, the measurement circuit configured to identify a current leak based on the monitoring signal.
  2. 2. The apparatus of claim 1, wherein the test signal comprises an AC forcing function.
  3. 3. The apparatus of claim 1, wherein the measurement circuit comprises a differential amplifier that measures a difference between the test signal and the monitor signal.
  4. 4. The apparatus of claim 1, wherein the voltage divider comprises a resistor and a capacitor.
  5. 5. The apparatus of claim 1, wherein the test connector comprises a charging plug configured to be coupled to a charging port of the vehicle.
  6. 6. The apparatus of claim 1, wherein the test connector comprises a plurality of connectors, each connector configured to couple to an electrical connector of the vehicle.
  7. 7. The apparatus of claim 6, comprising a switch configured to selectively couple the monitoring signal to at least one of the plurality of connectors.
  8. 8. The apparatus of claim 1, wherein the test connector comprises a connection to an electrical ground of the vehicle.
  9. 9. The apparatus of claim 8, wherein the electrical ground comprises a PE connection.
  10. 10. The apparatus of claim 1, comprising a digital-to-analog converter coupling the monitoring signal to the controller.
  11. 11. The apparatus of claim 1, wherein the controller is further configured to close a contactor of the vehicle.
  12. 12. The apparatus of claim 11, comprising a connection to a data bus of the vehicle, and wherein the controller communicates over the data bus.
  13. 13. The apparatus of claim 1, comprising a connection to a data bus of the vehicle, and wherein the controller communicates over the data bus.
  14. 14. The apparatus of claim 13, wherein the controller is configured to receive diagnostic information from a data connection to the vehicle.
  15. 15. The apparatus of claim 14, wherein the controller is configured to instruct an operator to perform a current leakage test on the vehicle based on the diagnostic information.
  16. 16. The apparatus of claim 1, wherein the test connector provides a kelvin connection.
  17. 17. The apparatus of claim 16, wherein a resistance between electrical ground and the kelvin connection is measured.
  18. 18. The apparatus of claim 17, wherein the kelvin connection is configured as a probe.
  19. 19. The apparatus of claim 18, wherein the controller instructs an operator where to place the probe.
  20. 20. The apparatus of claim 16, wherein the kelvin connection is configured to couple to a PE connection of the vehicle.

Description

Electric vehicle maintenance device Technical Field The present invention relates to an electric vehicle of the type that uses a battery pack to store electric power for powering the vehicle. This includes hybrid vehicles and electric vehicles. More particularly, the present invention relates to maintenance and diagnostics of electrical components and systems (e.g., battery packs) commonly used in electric vehicles. Background Conventionally, an automobile has used an internal combustion engine as its power source. However, electric vehicles are being widely used. Such vehicles may provide higher fuel efficiency and may operate using alternative energy sources. Some types of electric vehicles fully use electric motors and electric power to provide power. Other types of electric vehicles include internal combustion engines. The internal combustion engine may be used to generate electricity and supplement the power provided by the electric motor. These types of vehicles are known as "hybrid" electric vehicles. Operation of an electric vehicle requires a power source capable of providing a large amount of power. In general, an electric vehicle stores electric power in a large-sized battery pack composed of a plurality of batteries. These cells may be formed from a plurality of individual cells, or they may themselves be individual cells, depending on the configuration of the cells and battery packs. These battery packs are bulky, can be expensive to replace, and are difficult to access and maintain. Furthermore, it is desirable to test the safety of the vehicle and its components. The company Midtronics of Keith s.champlin doctor and wilobuck, il has first developed various techniques for testing batteries, electric and hybrid vehicles, and vehicle electrical systems using a variety of techniques including measuring dynamic parameters of the battery (e.g., dynamic conductivity of the battery). These techniques are described in various U.S. patents, such as U.S. patent No. issued at 25/3/1975; U.S. patent No. issued in 1975, 9 and 30; U.S. patent No. issued 28 in 3/1989; patent No.7 in the year of 1989, patent No. 14 in the year of 1999, patent No. 14 in the year of 1996 in the year of 1997, patent No. 14 in the year of 1996 in the year of 1998 in the year of 1994 in the year of 1996 in the year of No.6 in the year of 1996 in the year of 1997 in the year of 1998 in the year in a No. 18 in the year in a No.7 in the patent No.7 in the year in the No.6 in the year in the No in the year in the No in a No in the year No in-No the year of the year of the of No.6,137,269; U.S. patent No.6,137,269 issued 12/19/2000; U.S. patent No.6,137,269 issued 1/9/2001; no.3, no.1, no. 2, no.1, no. 15, no.1, no. 15, no.1, no. 15, no.1, no 'No. 1, no', no, no, no U.S. patent No.6,466,026; U.S. patent No.6,469,511 issued 11/22 in 2002; U.S. patent No.6,495,990 issued 12 months 17 in 2002; U.S. patent No.6,497,209 issued 12 months 24 in 2002; patent No.6,507,196 in the year 1 of the year 14 of the year 1 of the year 3 of the year 1 of the year 3 of the year 2 of the year 3 of the year 2 of the year 3 of the year 3 of the year, and No. 2 of the No. 2 of the year, and No.3 of the year, of the No. of the year, of the No. of the No No. of the date 3 of the date of the invention, of the year, of the invention, of the date, of the invention, of, and of, and, of, the, of, the, of, and, the, of, the, and, the, 3, and, 3, the, and, the, 3, and, 3, the, and, 3, and, the, 3, the, and, 3, the, 3, and, 3, the, 3, and, 3, and, 3, and, U.S. patent No.6,909,287 issued 6/21/2005; U.S. patent No.6,914,413 issued 7.5.2005; U.S. patent No.6,913,483 issued 7.5.2005; patent No.6,930,485 in the year of year 4, patent No.3 in the year of year 4, patent No. 2 in the year of year 4, patent No.3 in the year of year 4, patent No.4 in the year of year 4, patent No.3 in the year of year 4, patent No.4 in the year of year-year of the year-application-the-application-the-3 and-year-4 and-year-and-year-of-year-patent-and-year-of-year-of- -year- -year-of- -8-of-year-of-year-application-year-of-application-and-year- -of-year-patent-year-of-year-and-year-of-year-patent-of-year-patent-and-of-year patent-of-year patent-of-and-of-year patent and-year patent and-of-year patent and-year-of-and-of-year and of-and-year and of-year and of-year and patent and of-year and-year and of-year and of-year and year and of year and U.S. patent No.7,479,763 issued 1 month and 20 years, U.S. patent No.7,498,767 issued 3 months and 3 days 2009; U.S. patent No.7,501,795 issued 3 months 10 in 2009; U.S. patent No.7,505,856 issued 3 months 17 in 2009; U.S. patent No.7,545,146 issued 6/9/2009; the invention provides a method for treating a cardiovascular disease comprising the steps of (1) providing a year of being in the year of being and being in the year of being and being the use and being in the use and being the application of being in the invention, in the year of being in the con