Compensation device for discharge currents

Patent metadata

Field	Value
Publication number	US-11355945-B2
Application number	US-202117158233-A
Country	US
Kind code	B2
Filing date	Jan 26, 2021
Priority date	Feb 18, 2020
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A compensation device (20) for compensating for a discharge current has a compensation current generation device (28), a potential generation device (150), active conductor terminals (61, 62, 63, 64) and a PE conductor terminal (65), which active conductor terminals (61, 62, 63, 64) have a first active conductor terminal (61) and a second active conductor terminal (62; 64), which potential generation device (150) is interconnected with the first active conductor terminal (61) and has a potential generation device terminal (155), which potential generation device (150) is designed to provide a potential at the potential generation device terminal (155) which at least temporarily differs from the potential at the first active conductor terminal (61), and which compensation current generation device (28) is designed to effect a compensation current (I_COMP) between the potential generation device terminal (155) and the PE conductor terminal (65).

First claim

What is claimed is:

1. A compensation device ( 20 ) for compensating for a discharge current, the compensation device ( 20 ) comprises a compensation current generation device ( 28 ), a potential generation device ( 150 ), active conductor terminals ( 61 , 62 , 63 , 64 ) and a PE conductor terminal ( 65 ), wherein
the active conductor terminals ( 61 , 62 , 63 , 64 ) have a first active conductor terminal ( 61 ) and a second active conductor terminal ( 62 ; 64 ),
the potential generation device ( 150 ) is interconnected with the first active conductor terminal ( 61 ) and has a potential generation device terminal ( 155 ), the potential generation device ( 150 ) is designed to provide a potential at the potential generation device terminal ( 155 ) that differs, at least temporarily, from the potential at the first active conductor terminal ( 61 ),
the compensation current generation device ( 28 ) is designed to effect a compensation current (I_COMP) between the potential generation device terminal ( 155 ) and the PE conductor terminal ( 65 ), and
the potential generation device ( 150 ) has a first capacitor arrangement ( 151 ; 170 ), and the potential generation device terminal ( 155 ) is interconnected with the first active conductor terminal ( 61 ) via the first capacitor arrangement ( 151 ).

2. The compensation device ( 20 ) of claim 1 , wherein the potential generation device ( 150 ) is interconnected with the second active conductor terminal ( 62 ; 64 ), and wherein the potential generation device ( 150 ) is designed to provide a potential at the potential generation device terminal ( 155 ) that differs, at least temporarily, from the potential at the second active conductor terminal ( 62 ; 64 ).

3. The compensation device ( 20 ) of claim 1 , wherein the potential generation device ( 150 ) has a second capacitor arrangement ( 152 ), and the potential generation device terminal ( 155 ) is interconnected with the second active conductor terminal ( 62 ; 64 ) via the second capacitor arrangement ( 152 ).

4. The compensation device ( 20 ) of claim 3 , further comprising a line filter ( 160 ) that has X-capacitor arrangements for suppressing differential-mode interference and Y-capacitor arrangements for suppressing common-mode interference, the X-capacitor arrangements comprise a first X-capacitor arrangement between the first active conductor terminal ( 61 ) and the second active conductor terminal ( 62 ; 64 ), and the first capacitor arrangement ( 151 ) and the second capacitor arrangement ( 152 ) together form the first X-capacitor arrangement.

5. The compensation device ( 20 ) of claim 4 , wherein the X-capacitor arrangements comprise a second X-capacitor arrangement between the first active conductor terminal ( 61 ) and a further active conductor terminal ( 63 ), the further active conductor terminal ( 63 ) is not the second active conductor terminal ( 62 ; 64 ), the first X-capacitor arrangement has a first capacitance, and the second X-capacitor arrangement has a second capacitance that is in a range of between 70% and 130% of the first capacitance.

6. The compensation device ( 20 ) of claim 4 , wherein the Y-capacitor arrangements have a first Y-capacitor arrangement and a second Y-capacitor arrangement, the first Y-capacitor arrangement is connected between the first active conductor terminal ( 61 ) and the PE conductor terminal ( 25 ), and the second Y-capacitor arrangement is connected between the second active conductor terminal ( 62 ; 64 ) and the PE conductor terminal ( 65 ).

7. The compensation device ( 20 ) of claim 3 , wherein the active conductor terminals ( 61 , 62 , 63 , 64 ) have a third active conductor terminal ( 63 ), the potential generation device ( 150 ) has a third capacitor arrangement ( 153 ), and the potential generation device terminal ( 155 ) is interconnected with the third active conductor terminal ( 61 ) via the third capacitor arrangement ( 153 ).

8. The compensation device ( 20 ) of claim 7 , wherein the potential generation device ( 150 ) has a fourth capacitor arrangement ( 170 ) connected between the compensation current generation device ( 28 ) and the potential generation device terminal ( 155 ).

9. A vehicle ( 10 ) comprising: a traction battery ( 306 ) and a charging device ( 12 ) for the traction battery ( 306 ), the charging device ( 12 ) having the compensation device ( 20 ) of claim 1 and a rectifier ( 300 ), the traction battery ( 306 ) being connected directly or indirectly to the rectifier ( 300 ) and being coupled galvanically to the active conductor terminals ( 61 , 62 , 63 , 64 ) of the compensation device ( 20 ).

10. A compensation device ( 20 ) for compensating for a discharge current, the compensation device ( 20 ) comprising: a compensation current generation device ( 28 ); a DC link ( 303 , 305 ) that has Y-capacitors ( 307 , 308 ) having a first total capacitance; a potential generation device ( 150 ) having a second total capacitance that is in a range of from 60% to 140% of the first total capacitance; active conductor terminals ( 61 , 62 , 63 , 64 ); and a PE conductor terminal ( 65 ), wherein
the active conductor terminals ( 61 , 62 , 63 , 64 ) have a first active conductor terminal ( 61 ) and a second active conductor terminal ( 62 ; 64 ),
the potential generation device ( 150 ) is interconnected with the first active conductor terminal ( 61 ) and has a potential generation device terminal ( 155 ), the potential generation device ( 150 ) is designed to provide a potential at the potential generation device terminal ( 155 ) that differs, at least temporarily, from the potential at the first active conductor terminal ( 61 ), and
the compensation current generation device ( 28 ) is designed to effect a compensation current (I_COMP) between the potential generation device terminal ( 155 ) and the PE conductor terminal ( 65 ).

11. A compensation device ( 20 ) for compensating for a discharge current, comprising: compensation current generation devices ( 28 A, 28 B), active conductor terminals ( 61 , 62 , 63 , 64 ), a PE conductor terminal ( 65 ), a power supply unit ( 450 ) and a control device ( 26 ), wherein
the active conductor terminals ( 61 , 62 , 63 , 64 ) include a first active conductor terminal ( 61 ) and a second active conductor terminal ( 62 ), the compensation current generation devices ( 28 A, 28 B) comprise a first compensation current generation device ( 28 A) and a second compensation current generation device ( 28 B), the first compensation current generation device ( 28 A) is connected between the first active conductor terminal ( 61 ) and the PE conductor terminal ( 65 ), the second compensation current generation device ( 28 B) is connected between the second active conductor terminal ( 62 ) and the PE conductor terminal ( 65 ), the compensation current generation devices ( 28 A, 28 B) each have a compensation current actuator ( 403 , 413 ), and the control device ( 26 ) is designed to drive, with the aid of the power supply unit, the compensation current actuators ( 403 , 413 ) for generating a compensation current.

12. The compensation device ( 20 ) of claim 11 , wherein the compensation current generation devices ( 28 A, 28 B) each have a voltage reducer ( 401 , 411 ), the voltage reducers ( 401 , 411 ) are provided between the compensation current actuator ( 403 , 413 ) and the associated active conductor terminal ( 61 , 62 ) and are designed to reduce the voltage at the associated compensation current actuator ( 403 , 413 ) in comparison with the voltage at the associated active conductor terminal ( 51 , 52 ).

13. The compensation device ( 2

Assignees

• Porsche Ag
• Fraunhofer Ges Forschung

Inventors

• Spesser Daniel
• Pfizenmaier Tim
• Mayer Florian
• Endres Stefan
• Sessler Christoph

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/64

  against overvoltage · CPC title

• H02J2105/37

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

• H02J7/933 Primary

  the cycle being controlled or terminated in response to electric parameters · CPC title

• H02J7/02 Primary

  for charging batteries from AC mains by converters · CPC title