METHOD FOR CHARGING OR DISCHARGING A VEHICLE BATTERY

• US 20170113559A1
• Filed: 10/10/2016
• Published: 04/27/2017
• Est. Priority Date: 10/21/2015
• Status: Abandoned Application

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Kristof, Thomas, Herke, Dirk
• Application Number:
  US15/289,549
• Publication Number:
  US 20170113559A1
• Time in Patent Office: Days
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/50 Charging stations characterised by energy-storage or power-generation means
• 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 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

Abstract

A method for charging and/or discharging a vehicle battery using a multiphase transformer, in particular using a direct voltage transformer, wherein an input voltage is transformed into an output voltage with the multiphase transformer, wherein the multiphase transformer is operated with a permanently set transmission ratio, and the input voltage is varied in order to adapt the output voltage.

Claims

1. A method for charging or discharging a vehicle battery using a multiphase transformer, the method comprising the steps of:

transforming an input voltage into an output voltage using the multiphase transformer,

operating the multiphase transformer with a permanently set transmission ratio, and

varying the input voltage in order to adapt the output voltage.

2. The method as claimed in claim 1, further comprising limiting the input voltages to a permitted input voltage range, operating the multiphase transformer with input voltages from the permitted input voltage range in a region of an efficiency-optimized working point of the multiphase transformer.

3. The method as claimed in claim 2, wherein in order to expand the permitted input voltage range a plurality of efficiency-optimized working points are made available by the multiphase transformer.

4. The method as claimed in claim 1, wherein changing occurs between fixed transmission ratios during either a charging or discharging process.

5. The method as claimed in claim 1, further comprising carrying out communication using an output-voltage-side charge management system, with an input-voltage-side control device for setting the input voltage.

6. The method as claimed in claim 1, wherein the multiphase transformer is used (a) to charge the vehicle battery using a charging station, (b) for the vehicle-internal supply of a vehicle component using the vehicle battery, and/or (c) for feeding back energy into a supply system of the charging station.

7. A charging station for charging the vehicle battery using the method as claimed in claim 6, wherein the charging station has a control device for making available a variable input voltage for the multiphase transformer.

8. A system comprising the charging station and the vehicle including the vehicle battery and the multiphase transformer, wherein the charging station and the vehicle are configured to carry out the method as claimed in claim 6.

9. The method as claimed in claim 1, wherein the multiphase transformer is a direct voltage transformer.