HIGH-VOLTAGE CHARGE BOOSTER AND METHOD FOR CHARGING A DIRECT CURRENT TRACTION BATTERY AT A DIRECT CURRENT CHARGING PILLAR AND CORRESPONDING ELECTRIC VEHICLE

• US 20160214493A1
• Filed: 01/26/2016
• Published: 07/28/2016
• Est. Priority Date: 01/28/2015
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Herke, Dirk, Spesser, Daniel
• Granted Patent: US 10,471,837 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• 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 10/72 Electric energy management in electromobility
• 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

A high-voltage charge booster is provided for charging a direct current traction battery at a direct current charging pillar. The high-voltage charge booster has a converter (14) for transforming the first voltage level into the second voltage level if the first voltage level differs from the second voltage level. A bypass (16) bypasses the converter (14) or connects through a power stage if the first voltage level corresponds to the second voltage level.

Claims

1. A high-voltage charge booster for charging a traction battery at a direct current charging pillar, the charging pillar having a first voltage level (V_in) and the traction battery having a second voltage level (V_out), the high-voltage charge booster comprising:

a converter for transforming the first voltage level (V_in) into the second voltage level (V_out) if the first voltage level (V_in) differs from the second voltage level (V_out), and

a bypass for bypassing the converter or connecting through a power stage if the first voltage level (V_in) corresponds to the second voltage level (V_out).

2. The high-voltage charge booster of claim 1, wherein the converter is configured bidirectionally so that, given a power of up to 150 kW the booster, the converter charges the traction battery with an output current of up to more than 200 A if the charging pillar feeds the booster with an input current between 330 A and 350 A, the first voltage level (V_in) is between 200 V and 450 V, and the second voltage level (V_out) is 800 V.

3. The high-voltage charge booster of claim 1, wherein the booster has a volumetric capacity of approximately 6 I.

4. An electric vehicle, comprising:

an electric motor for driving the electric vehicle,

a traction battery for feeding the electric motor,

at least one on-board charging device for charging the traction battery at an alternating current charging socket,

the high-voltage charge booster of claim 1 for charging the traction battery at a direct current charging pillar,

cabling of the bypass and

an on-board computer connected by cable to the high-voltage charge booster.

5. The electric vehicle of claim 4, wherein:

the electric vehicle comprises two on-board charging devices and

the on-board charging devices are configured so that, given a respective power of 11 kW, the on-board charging devices charge the traction battery with an output current of 28 A if the charging socket feeds the on-board charging device with a three-phase input current of up to 32 A, and the second voltage level (V_out) is 700 to 900 V or more.

6. A method for charging the electric vehicle of claim 4 at a direct current charging pillar with a first voltage level (V_in) of 400 V, comprising:

connecting the electric vehicle to the charging pillar,

evaluating the operational capability of the booster,

detecting the first voltage level (V_in) for a given operational capability,

initiating an exchange of information with the charging pillar for a detected first voltage level (V_in),

transmitting charging-relevant information to the charging pillar,

availability testing a required power of the booster,

recording a charging process,

connecting the power to the booster,

plausibility-checking a charging current flowing from the charging pillar,

storing environmental data,

monitoring the charging process, and

ending of the charging process.

7. The method of claim 6, wherein:

the transmitting of the charging-relevant information is carried out by a first software module for controlling the charging process,

the monitoring of the charging process is carried out by a second software module for detecting and checking the plausibility of the charging process,

the evaluation of the operational capability is carried out by a third software module for evaluating an actual state,

the availability checking of the power and recording of the charging process are carried out by means of a fourth software module for throttling the charging process,

the connecting of the power is carried out by a fifth software module for switching over a contactor,

the detecting of the first voltage level (V_in) is carried out by a sixth software module for communicating with the charging pillar,

the plausibility-checking of the charging currents is carried out by a seventh software module for checking the plausibility of the charging currents,

the storing of the environmental data is carried out by an eighth software module for storing historical data, and

the ending of the charging process is carried out by a ninth software module for ending the charging process.

8. The method as of claim 7, wherein a software function that is located in the on-board charging device or in the booster comprises the software modules.

9. A computer program configured to carry out all the steps of the method of claim 6.

10. A machine-readable storage medium having a computer program stored thereon, as claimed in claim 9.