Galvanic cell and method for producing a galvanic cell

1. A galvanic cell ( 2 ) comprising a housing ( 4 ), in which at least one cell coil or one cell stack is contained, having a body ( 8 ) and a lid ( 6 ) that closes an opening of the body ( 8 ), and comprising a sensor ( 16 ) for detecting a pressure of the galvanic cell ( 2 ), wherein the lid ( 6 ) has a recess ( 18 ), which is a through opening ( 20 ) between an interior ( 22 ) and an exterior ( 24 ) of the cell ( 2 ), wherein the sensor ( 16 ) is arranged outside the lid ( 6 ), wherein a base element ( 26 ) secures the sensor ( 16 ) to the exterior ( 24 ) of the lid ( 6 ), the base element directly contacting both of the sensor ( 16 ) and the lid ( 6 ), wherein the sensor ( 16 ) communicates with the interior ( 22 ) of the galvanic cell ( 2 ) via the through opening ( 20 ), wherein no portion of the sensor ( 16 ) or the base element ( 26 ) extends into the interior ( 22 ) of the cell ( 2 ), wherein the sensor ( 16 ) is a microelectromechanical system, and wherein the sensor ( 16 ) is connected to an evaluation unit by at least one first bonding wire ( 40 ).

2. The galvanic cell ( 2 ) as claimed in claim 1 , wherein the sensor ( 16 ) is configured to provide a relative pressure measurement or wherein the sensor ( 16 ) has a reference volume ( 34 ) and is configured to provide an absolute pressure measurement.

3. The galvanic cell ( 2 ) as claimed in claim 1 , characterized in that the galvanic cell ( 2 ) is a prismatic galvanic cell ( 2 ) and the housing ( 4 ) is made of a shape-stable material.

4. The galvanic cell ( 2 ) as claimed in claim 1 wherein the base element ( 26 ) has a second recess ( 28 ) which forms, together with the recess ( 18 ) of the housing ( 4 ), the through opening ( 20 ).

5. The galvanic cell ( 2 ) as claimed in claim 1 , characterized in that the base element ( 26 ) is made from a glass.

6. The galvanic cell ( 2 ) as claimed in claim 1 , characterized in that the base element ( 26 ) and/or the sensor ( 16 ) have an electrolyte-resistant protective layer.

7. The galvanic cell ( 2 ) as claimed in claim 1 , characterized in that the sensor ( 16 ) is arranged beneath a protective housing ( 46 ), or is embedded in a casting compound.

8. A method for producing a galvanic cell ( 2 ) with a housing ( 4 ), in which at least one cell coil or one cell stack is contained, having a body ( 8 ) and a lid ( 6 ) that closes an opening of the body ( 8 ), and with a sensor ( 16 ) for detecting the pressure of the galvanic cell ( 2 ), wherein the sensor ( 16 ) is a microelectromechanical system, the method comprising the steps:

a) providing the housing lid ( 6 ) with a recess ( 18 ), which is a through opening ( 20 ) between an interior ( 22 ) and an exterior ( 24 ) of the cell ( 2 ),

b) fastening the sensor ( 16 ) outside the housing lid ( 6 ) and to the housing lid ( 6 ) via a base element ( 26 ) disposed between the sensor ( 16 ) and the housing lid ( 6 ) in direct contact with both of the sensor ( 16 ) and the lid ( 6 ), so that the sensor ( 16 ) communicates with the interior ( 22 ) of the galvanic cell ( 2 ) via the recess ( 18 ), wherein no portion of the sensor ( 16 ) or the base element ( 26 ) extends into the interior ( 22 ) of the galvanic cell ( 2 ),

c) wire bonding the sensor ( 16 ) to produce an electrical connection to evaluation electronics, and

d) fastening the housing lid ( 6 ) to the housing body ( 8 ) of the cell ( 2 ) to close the opening of the body ( 8 ).

9. The galvanic cell ( 2 ) as claimed in claim 2 , wherein the sensor ( 16 ) is configured to provide a relative pressure measurement.

10. The galvanic cell ( 2 ) as claimed in claim 2 , wherein the sensor ( 16 ) has a reference volume ( 34 ) and is configured to provide an absolute pressure measurement.

11. The galvanic cell ( 2 ) as claimed in claim 7 , characterized in that the sensor ( 16 ) is arranged beneath a protective housing ( 46 ).

12. The galvanic cell ( 2 ) as claimed in claim 7 , characterized in that the sensor ( 16 ) is embedded in a casting compound.

13. A galvanic cell ( 2 ) comprising a housing ( 4 ), in which at least one cell coil or one cell stack is contained, having a body ( 8 ) and a lid ( 6 ) that closes an opening of the body ( 8 ), and comprising a sensor ( 16 ) for detecting a pressure of the galvanic cell ( 2 ), wherein the lid ( 6 ) has a recess ( 18 ), which is a through opening ( 20 ) between an interior ( 22 ) and an exterior ( 24 ) of the cell ( 2 ), wherein the sensor ( 16 ) is arranged outside the lid ( 6 ) and secured directly or indirectly to the exterior ( 24 ) of the lid ( 6 ), wherein the sensor ( 16 ) communicates with the interior ( 22 ) of the galvanic cell ( 2 ) via the through opening ( 20 ), wherein the sensor ( 16 ) is a microelectromechanical system, wherein the sensor ( 16 ) is connected to an evaluation unit by at least one first bonding wire ( 40 ), wherein the evaluation unit includes an ASIC ( 42 ) located on a circuit board ( 44 ), and wherein the sensor ( 16 ) is coupled to the ASIC ( 42 ) via the at least one first bonding wire ( 40 ), and wherein the evaluation unit and the sensor ( 16 ) are located within one of a protective housing ( 46 ) attached to the exterior of the lid or a casting element attached to the exterior of the lid, wherein a base element secures the sensor to the exterior of the lid, and wherein no portion of the sensor or the base element extends into the interior of the cell.