Method for charging an electrical energy store by means of voltage pulses

Patent metadata

Field	Value
Publication number	US-11299057-B2
Application number	US-201816755725-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Oct 12, 2017
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

The invention relates to a method for charging an electrical energy store, the electrical energy store comprising at least one electrical energy storage unit and a predefined maximum permissible energy-store voltage limit value being specified for the electrical energy store. The electrical energy store is charged with a pulsed charging voltage, a maximum value of the pulsed charging voltage being greater than the predefined maximum permissible energy-store voltage limit value over a pulse duration in the case of at least one pulse. The invention further relates to a corresponding device for charging the electrical energy store, to a corresponding computer program, to a corresponding machine-readable storage medium and to a corresponding electrical energy store.

First claim

The invention claimed is:

1. A method for charging an electrical energy store ( 1 ) that includes at least one electrical energy storage unit ( 11 , 12 , 13 ), wherein a maximum permissible energy-store voltage limit value is specified for the electrical energy store ( 11 , 12 , 13 ), the method comprising:
a) charging the electrical energy store ( 1 ) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

2. The method as claimed in claim 1 , further comprising:
b) driving an electronic circuit ( 18 ) in such a manner that an electrical charging voltage applied to the electronic circuit ( 18 ) is converted by the electronic circuit ( 18 ) into the pulsed electrical charging voltage.

3. The method as claimed in claim 1 , further comprising:
c) determining a charge state variable of the electrical energy store ( 1 );
d) comparing the determined charge state variable with a predefined charge state variable threshold value;
e) if the charge state variable exceeds or reaches the predefined charge state variable threshold value, interrupting the charging of the electrical energy store ( 1 ).

4. The method as claimed in claim 1 , wherein the pulse duration is less than 50 milliseconds.

5. The method as claimed claim 1 , wherein a mean value of the pulsed electrical charging voltage over the pulse duration is greater than the maximum permissible energy-store voltage limit value.

6. The method as claimed in claim 1 , wherein the pulsed electrical charging voltage over the pulse duration is greater than the maximum permissible energy-store voltage limit value.

7. A device for charging an electrical energy store ( 1 ), wherein the electrical energy store comprises at least one electrical energy storage unit ( 11 , 12 , 13 ), and a maximum permissible energy-store voltage limit value is specified for the electrical energy store ( 1 ), and wherein the device comprises an electronic circuit ( 18 ) for connecting to the electrical energy store ( 1 ) and an electronic control unit ( 16 ), wherein the electronic control unit ( 16 ) is configured to control charging of the electrical energy store ( 1 ) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

8. The device as claimed in claim 7 , wherein the electronic circuit comprises two power semiconductor switches ( 14 , 15 ) which are connected in series in opposite directions.

9. A non-transitory, computer-readable storage medium containing instructions that when executed by a computer cause the computer to
control charging of an electrical energy store ( 1 ) that includes at least one electrical energy storage unit ( 11 , 12 , 13 ), wherein a maximum permissible energy-store voltage limit value is specified for the electrical energy store ( 11 , 12 , 13 ), by charging the electrical energy store ( 1 ) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

10. An electrical energy store ( 1 ), comprising:
at least one electrical energy storage unit ( 11 , 12 , 13 ); and
a device having an electronic circuit ( 18 ) for connecting to the electrical energy store ( 1 ) and an electronic control unit ( 16 ), wherein the electronic control unit ( 16 ) is configured to control charging of the electrical energy store ( 1 ) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than a maximum permissible energy-store voltage limit value specified for the electrical energy store ( 11 , 12 , 13 ), wherein the pulse duration is shorter than or equal to half a pulse period.

Assignees

• Bosch Gmbh Robert

Inventors

• Lemke Andreas
• Teusch Stefan
• Lang Thomas
• Hinninger Maximilian
• Groezinger Daniel
• Schuetterle Ulrich

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/927

  with introduction of pulses during the charging process · CPC title

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• B60L53/62 Primary

  in response to charging parameters, e.g. current, voltage or electrical charge · CPC title