Device for charging an energy storage unit of one or more electrically operated vehicles

• US 9,662,994 B2
• Filed: 09/12/2014
• Issued: 05/30/2017
• Est. Priority Date: 03/13/2012
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Kaindl, Michael
• Primary Examiner(s): Rodas, Richard Isla
• Assistant Examiner(s): Henze-Gongola, David V
• Application Number:
  US14/485,111
• Publication Number:
  US 20150028810A1
• Time in Patent Office: 991 Days
• Field of Search: 320109
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of 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
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/12 Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

An apparatus is provided for charging an energy storage unit of one or more electrically operated vehicles. The apparatus has at least two charging connections. Each of the charging connections has a communication port for exchanging data with the vehicle connected to the charging connection. The communication port of each of the charging connections is coupled to an assigned first communication device, which is designed for communicating with a corresponding first communication device of the vehicle connected to the relevant charging connections, based on a pulse-width modulated signal transmission. A second communication device is coupled via a coupling point to communication ports of all charging connections to communicate with a corresponding second communication device of a vehicle, based on digital data transmission. A compensation unit is wired in between the coupling point and the first communication devices, which is designed to generate a counter-phase signal to a signal that is transmitted from a transmitting first communication device to the assigned communication port and to apply it to the coupling point.

Claims

1. An apparatus for charging an energy storage unit of one or more electrically operated vehicles, comprising:

at least two charging connections, wherein each of the charging connections has a communication port for exchanging data with the vehicle when connected to the charging connection, wherein

the communication port of each of the at least two charging connections is coupled to an assigned first communication device, which is configured for communicating with a corresponding first communication device of the vehicle connected to the relevant charging connection based on a pulse width modulated signal transmission;

a second communication device is coupled via a coupling point to the communication ports of all charging connections to communicate with a corresponding second communication device of a vehicle based on digital data transmission;

a compensation unit wired in between the coupling point and each of the first communication devices, the compensation unit generating a counter-phase signal to a signal that is transmitted from any of the first communication devices to a corresponding one of the at least two charging connections and applying the counter-phase signal to the coupling point.

2. The apparatus according to claim 1, wherein the compensation unit comprises at least a first function unit for phase-shifting the signal sent out by the transmitting first communication device in operation.

3. The apparatus according to claim 2, wherein the compensation unit comprises at least a second function unit, which replicates an electrical behavior of the corresponding first communication device of the vehicle that is connected to the charging connection, whose assigned first communication device generates the signal.

4. The apparatus according to claim 1, wherein the compensation unit comprises at least a second function unit, which replicates an electrical behavior of the corresponding first communication device of the vehicle that is connected to the charging connection, whose assigned first communication device generates the signal.

5. The apparatus according to claim 3, wherein a switching element of the second function unit is actuated such that its switching state corresponds to the switching state of a corresponding switching element of the corresponding first communication device.

6. The apparatus according to claim 4, wherein a switching element of the second function unit is actuated such that its switching state corresponds to the switching state of a corresponding switching element of the corresponding first communication device.

7. The apparatus according to claim 5, wherein the switching element of the second function unit is controllable by a controller, which serves to control a selector switch of the charging connection and/or the first communication device.

8. The apparatus according to claim 6, wherein the switching element of the second function unit is controllable by a controller, which serves to control a selector switch of the charging connection and/or the first communication device.

9. The apparatus according to claim 5, wherein the switching element of the second function unit is controllable depending on a signal level detected in the transmitting communication device.

10. The apparatus according to claim 6, wherein the switching element of the second function unit is controllable depending on a signal level detected in the transmitting communication device.

11. The apparatus according to claim 9, wherein the second function unit is configured to detect the signal level of a power driver which is constructed as a push-pull amplifier of the first communication device.

12. The apparatus according to claim 10, wherein the second function unit is configured to detect the signal level of a power driver which is constructed as a push-pull amplifier of the first communication device.

13. The apparatus according to claim 3, wherein the compensation unit comprises at least a third function unit configured to replicate the electrical behavior of a line, which connects the vehicle to the charging connection during a charging process.

14. The apparatus according to claim 13, wherein the first, second and/or the third function unit is connected to each of the first communication devices.

15. The apparatus according to claim 13, wherein the compensation unit comprises a plurality of number of compensation devices corresponding to the number of charging connections, wherein each of the compensation devices comprises the first, the second, and the third function units.