Galvanic cell and method for producing a galvanic cell

Patent metadata

Field	Value
Publication number	US-10700392-B2
Application number	US-201515525449-A
Country	US
Kind code	B2
Filing date	Sep 28, 2015
Priority date	Nov 10, 2014
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

The invention relates to a galvanic cell (2) comprising a housing (4) which is equipped with at least one cell coil or a cell stack and comprising a sensor (16) for detecting the pressure of the galvanic cell (2). The housing (4) has a recess which is formed from a through-opening between an interior and an exterior of the cell (2), and the sensor (16) is arranged outside of the cell (2) so as to be secured directly or indirectly to the cell. The sensor (16), in particular a micro electromechanical system, is in contact with the interior of the galvanic cell (2) via the recess. The invention additionally relates to a method for producing such a galvanic cell (2).

First claim

What is claimed is:

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.

Assignees

• Bosch Gmbh Robert

Inventors

• Pantel Daniel
• Henrici Fabian
• Mingirulli Nicola

Classifications

• H01M10/48 Primary

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M6/50 Primary

  Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/42

  Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title