BATTERY SYSTEM AND METHOD FOR THE OPERATION THEREOF

• US 20180272883A1
• Filed: 03/20/2018
• Published: 09/27/2018
• Est. Priority Date: 03/21/2017
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Schmidt, Tim, Fauri, Mikel, Dibos, Hermann
• Granted Patent: US 10,583,749 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/51 Connection only in series
• CPC Class Codes: H01M 50/581 in response to temperature
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• 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

Abstract

A battery system, in particular for a motor vehicle, to a power supply comprising the battery system for an electric machine, in particular a vehicle drive, and to a method for charging the battery system.

Claims

1. A battery system, comprising:

at least two modules, each module having at least two cells connected in series, a position pole, and a negative pole;

a first interface having a number of connections equal to double the number of the at least two modules; and

conductors that connect the positive poles and the negative poles to respective connections on the first interface, wherein the conductors that connect the positive poles of the modules to the first interface each have a switch, which is open when the associated connection of the first interface is open.

2. The battery system as claimed in claim 1, wherein the battery system is a high-voltage (HV) battery system.

3. The battery system as claimed in claim 1, wherein a sum of voltages of the at least two modules is greater than 800 V.

4. The battery system as claimed in claim 1, wherein the first interface is a high-voltage (HV) plug connector.

5. The battery system as claimed in claim 1, wherein the switches are embodied as electrically or electronically operated switches.

6. A power supply for a vehicle drive electric machine, comprising:

a battery system as claimed in claim 1;

a second interface having the same number of connections as the first interface of the battery system;

a number of fuses corresponding to the number of modules in the battery system reduced by 1;

and a converter;

wherein each connection of the second interface is connected to a respective connection of the first interface, and each fuse is connected to a respective positive pole of one of the modules of the battery system and to a respective negative pole of another of the modules of the battery system such that all the modules of the battery system are connected in series by the fuses, and wherein the two remaining connections of the second interface are connected to an input of the converter.

7. The power supply as claimed in claim 6, wherein the converter comprises an inverter.

8. The power supply as claimed in claim 6, wherein the converter comprises a step-down converter.

9. The power supply as claimed in claim 6, wherein at least one of the fuses is a safety fuse.

10. The power supply as claimed in claim 6, wherein at least one of the fuses is an electronic fuse.

11. The power supply as claimed in claim 6, wherein the first interface and the second interface together form a high-voltage (HV) plug connection.

12. A method for charging a battery system as claimed in claim 1, the method comprising:

connecting at least one charging device to at least one module of the battery system; and

charging the battery system.

13. The method as claimed in claim 12, wherein each module is connected to a charging device and charged.

14. The method as claimed in claim 12, wherein a plurality of charging devices are in each case connected simultaneously to at least one module and the modules connected to the charging devices are charged simultaneously.

15. The method as claimed in claim 12, wherein the number of charging devices is equal to the number of modules in the battery system.