System for electrically connecting batteries to electric vehicles

• US 8,454,377 B2
• Filed: 07/12/2011
• Issued: 06/04/2013
• Est. Priority Date: 09/19/2008
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Better Place GmbH
• Inventors: Heichal, Yoav, Agassi, Tal, Agassi, Shai
• Primary Examiner(s): NGUYEN, TRUC T
• Application Number:
  US13/181,000
• Publication Number:
  US 20120009804A1
• Time in Patent Office: 693 Days
• Field of Search: 439247-248, 439/34, 439/374, 180/65.1
• US Class Current: 439/247
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/0438 Arrangement under the floor
• CPC Class Codes: B60K 2001/0472 from below
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/80 Exchanging energy storage elements, e.g. removable batteries
• CPC Class Codes: G02B 6/3817 containing optical and electrical conductors cables including electrical and optical conductors H01B11/22; G02B6/3816 takes precedence
• CPC Class Codes: H01M 50/244 Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
• CPC Class Codes: H01M 50/249 specially adapted for aircraft or vehicles, e.g. cars or trains constructional details of batteries specially adapted for electric vehicles B60L50/64
• CPC Class Codes: H01M 50/296 characterised by terminals of battery packs terminals of batteries H01M50/543
• 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
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

The connection system is designed to facilitate electrical and data connections between the battery and the electric vehicle. The connectors are designed with alignment mechanisms to account for initial misalignment of the battery and vehicle while still ensuring positive contact between them. The alignment mechanisms also introduce compliance into the system to ensure that the mechanical components of the system are not placed under unwanted loads or stresses. The connection system houses data connectors carrying communication signals as well as power connectors carrying high voltage electricity. The data connectors are shielded to prevent interference caused by proximity to the high voltage elements. The connection system uses no mechanical latching or locking mechanisms.

Claims

1. An electrical connection system for at least partially electric vehicle, the electrical connection system comprising:

an electrical connector comprising;

a first electrical connector configured to permanently attach to an underside of a vehicle or to a battery, and configured to removeably couple to a second electrical connector that itself is configured to permanently attach to the other of the vehicle or the battery to which the first electrical connector is not attached, wherein

said first electrical connector comprises a first coupling portion adapted for mating with a second coupling portion of said second electrical connector and the first electrical connector comprises;

at least a high voltage interface for transmitting high voltage electricity between said first and second electrical connectors;

a mounting portion for permanently attaching to a respective one of said vehicle or said battery; and

a coupler attached to the mounting portion to allow relative motion between the coupling portion and the mounting portion, said coupler configured for compensating for misalignment between the first and second electrical connectors.

2. The electrical connection system according to claim 1 wherein said coupler attaches the coupling portion to the mounting portion with a spring mechanism positioned between the coupling portion and the mounting portion.

3. The electrical connection system according to claim 1, wherein said coupler is configured to allow the coupling portion to move in vertical and horizontal planes with respect to the mounting portion.

4. The electrical connection system according to claim 1, wherein the coupler comprises:

a hole in the coupling portion; and

a bolt rigidly attached to the mounting portion and extending through the hole in the coupling portion, the bolt having a smaller diameter than the hole.

5. The electrical connection system according to claim 4, wherein the coupler further comprises a coil spring positioned between the coupling portion and the mounting portion.

6. The electrical connection system according to claim 5, wherein the bolt extends through the center of the coil spring.

7. The electrical connection system according to claim 1 wherein the coupling portion includes:

a high voltage interface for transmitting high voltage electricity between the coupling portion and a second high voltage interface of the second coupling portion;

a data interface for transmitting data between the coupling portion and a second data interface of the second coupling portion; and

the electrical connector comprises a shielding mechanism to protect the data interface from electromagnetic effects caused by the high voltage electricity.

8. The electrical connection system according to claim 1 wherein said coupler is located between the coupling portion and the mounting portion and configured for providing movement of the coupling portion in vertical and horizontal planes with respect to the mounting portion.

9. The electrical connection system according to claim 7, wherein the shielding mechanism separates the data interface from the high voltage interface to protect the data interface from electromagnetic effects caused by one or more high voltage connection elements.

10. The electrical connection system according to claim 7, wherein the shielding mechanism comprises a housing that substantially covers the data interface.

11. The electrical connection system according to claim 9, wherein the housing is L-shaped.

12. The electrical connection system according to claim 1, wherein at least one of the electrical connectors further comprises a sealing mechanism positioned between the electrical connectors for preventing environmental contamination when the electrical connectors are coupled.

13. The electrical connection system according to claim 1, wherein the high voltage interfaces of the electrical connector comprises at least one of the following:

conductive pins; and

sockets for receiving conductive pins, wherein the sockets have a conductive mesh sleeve for forming an electrical connection with the conductive pins.

14. The electrical connection system according to claim 7, wherein the data interface of the electrical connector connectors comprises at least one of the following:

conductive pins; and

sockets for receiving conductive pins, wherein the sockets have a conductive mesh sleeve for forming an electrical connection with the conductive pins.

15. The electrical connection system according to claim 1, wherein the coupling portion is configured to ensure lateral alignment with said second coupling portion of said another electrical connector, the coupling portion includes at least one of the following:

a pin having an outside surface adapted to mate with an inside surface of a socket of said second coupling portion; and

a socket with an inside surface for receiving a pin of said second coupling portion.

16. The electrical connection system according to claim 14, wherein the inside surface of the socket is a channel, the channel having an inside surface larger than the pin to allow for space between a portion of the inside surface of the channel and a portion of the outside surface of the pin.

17. The electrical connection system according to claim 1, wherein high voltage electricity is between about 100 and 1000 VDC.

18. The electrical connection system according to claim 1, wherein high voltage electricity is between about 200 and 800 VDC.

19. The electrical connection system according to claim 1, wherein high voltage electricity is between about 350 and 450 VDC.