Storage module having a degassing line

Patent metadata

Field	Value
Publication number	US-12278388-B2
Application number	US-202017613246-A
Country	US
Kind code	B2
Filing date	Apr 28, 2020
Priority date	May 27, 2019
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

A storage module for storing electrical energy includes an electrochemical storage cell, a housing which encloses the electrochemical storage cell, and a degassing line which is disposed on the housing and runs outside of the housing. An exhaust gas from an interior of the housing is dischargeable by the degassing line to an area surrounding the storage module and is coolable by the degassing line.

First claim

What is claimed is:

1. A vehicle, comprising:
an electric drive motor; and
a storage module disposed on a floor panel of the vehicle, wherein the storage module is configured to store electrical energy for operating the electric drive motor;
wherein the storage module comprises:
an electrochemical storage cell;
a housing which encloses the electrochemical storage cell; and
a degassing line, wherein the degassing line is part of at least one structural element of the housing that mounts the storage module on the floor panel of the vehicle, wherein the degassing line is an exhaust gas pipe that extends from the housing to a point that is external to the vehicle and beyond a fender of the vehicle, and wherein an exhaust gas from an interior of the housing is dischargeable by the degassing line to an area external to the vehicle and is coolable by the degassing line;
wherein the degassing line is configured such that the exhaust gas is no longer self-ignitable upon contact with ambient air at an outlet of the degassing line such that a thermal load on an area surrounding the storage module is reduceable.

2. The vehicle according to claim 1 , wherein the degassing line has a length which runs outside the housing and which is greater by a factor than a diameter of the degassing line and wherein the factor is equal to 5 or more.

3. The vehicle according to claim 1 , wherein:
the housing has a line outlet, wherein the exhaust gas is passable from the interior of the housing through the line outlet to the degassing line; and
the degassing line is configured such that the exhaust gas has a temperature of 400° C. or less at the outlet of the degassing line.

4. The vehicle according to claim 1 , wherein the degassing line is configured such that a temperature of the exhaust gas decreases by 20% or more as the exhaust gas passes through the degassing line.

5. The vehicle according to claim 1 , further comprising a cooling unit which is configured to actively cool the degassing line, wherein the cooling unit is an actively cooled heat sink.

6. The vehicle according to claim 1 , wherein the storage module has a degassing valve which is configured to:
suppress outlet of the exhaust gas from the interior of the housing through the degassing line to the area surrounding the storage module when a pressure within the housing is less than a pressure threshold value; and/or
allow outlet of the exhaust gas from the interior of the housing through the degassing line to the area surrounding the storage module when the pressure within the housing is greater than the pressure threshold value.

7. The vehicle according to claim 6 , wherein the degassing valve is disposed at a first end of the degassing line that faces the housing, at a second end of the degassing line that is averted from the housing, or between the first end and the second end.

8. The vehicle according to claim 1 , wherein the degassing line has a surface-increasing structure which:
increases a surface of the degassing line that cools the exhaust gas; and/or
conducts the exhaust gas within the degassing line toward a line wall of the degassing line and/or away from the line wall of the degassing line.

9. The vehicle according to claim 8 , wherein the surface-increasing structure is disposed within the degassing line and/or is enclosed by the line wall of the degassing line and wherein the surface-increasing structure is at least partially grid-like.

10. The vehicle according to claim 1 , wherein:
the storage module has a rated voltage of 300 V or higher; or
the storage module has a storage capacity of 5 kWh or more; or
the storage module is a high-voltage storage device; or
the storage module stores electrical energy for driving a motor vehicle.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Ben Salah Semi

Classifications

• H01M2220/20

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

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/358

  External gas exhaust passages located on the battery cover or case · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title