Battery degassing duct structure

Patent metadata

Field	Value
Publication number	US-11872897-B2
Application number	US-202117522020-A
Country	US
Kind code	B2
Filing date	Nov 9, 2021
Priority date	Nov 10, 2020
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

An electric vehicle has longitudinal sills, arranged on both sides of the electric vehicle, and a traction battery, arranged between the sills, for driving the electric vehicle. The traction battery has a device for degassing the traction battery in the case of a thermal event. A duct for carrying gas during degassing of the traction battery is formed in the electric vehicle between at least one of the longitudinal sills and the traction battery. An electric vehicle of this kind ensures increased occupant protection and increased component protection.

First claim

What is claimed is:

1. An electric vehicle comprising:
longitudinal sills arranged on both sides of the electric vehicle,
a traction battery, arranged between said sills, for driving the electric vehicle, wherein the traction battery has a device for degassing the traction battery in case of a thermal event, and
a duct for carrying gas during degassing of the traction battery, wherein the duct is located in the electric vehicle between at least one of the longitudinal sills and the traction battery, wherein the duct comprises (i) a surface of the traction battery facing one of the longitudinal sills and (ii) a surface of said one of the longitudinal sills.

2. The electric vehicle as claimed in claim 1 , wherein the traction battery has a multiplicity of battery cells.

3. The electric vehicle as claimed in claim 1 , wherein the traction battery comprises at least one battery system, which comprises at least two battery modules.

4. The electric vehicle as claimed in claim 3 , wherein each respective battery module comprises a battery module housing and at least two battery cells.

5. The electric vehicle as claimed in claim 4 , wherein the battery modules are arranged in a battery case.

6. The electric vehicle as claimed in claim 5 , wherein the device for degassing is a bursting element fitted in the battery case and/or the battery module housing, which bursting element is configured to reduce a pressure during the sudden degassing of one or more of the battery cells.

7. The electric vehicle as claimed in claim 1 , wherein surfaces associated with the traction battery and forming the duct on a battery side have one or more degassing positions.

8. The electric vehicle as claimed in claim 7 , wherein the device for degassing comprises bursting elements arranged in a region of the degassing positions.

9. The electric vehicle as claimed in claim 1 , wherein the duct is open in front of and/or behind the traction battery.

10. The electric vehicle as claimed in claim 1 , wherein, in front of and/or behind the traction battery, the duct has a connection to an air duct with connection to surroundings of the electric vehicle.

11. The electric vehicle as claimed in claim 1 , wherein the duct is formed in part by further components.

12. The electric vehicle as claimed in claim 11 , wherein one of the further components is a mounting bracket for the traction battery, wherein the mounting bracket is connected to one of the longitudinal sills.

13. An electric vehicle comprising:
longitudinal sills arranged on both sides of the electric vehicle,
a traction battery, arranged between said sills, for driving the electric vehicle, wherein the traction battery has a device for degassing the traction battery in case of a thermal event, and
a duct for carrying gas during degassing of the traction battery, wherein the duct is located in the electric vehicle between at least one of the longitudinal sills and the traction battery,
wherein the traction battery comprises at least one battery system, which comprises at least two battery modules,
wherein each respective battery module comprises a battery module housing and at least two battery cells,
wherein the battery modules are arranged in a battery case,
wherein the duct is formed by a side wall of one of the battery cases and one of the longitudinal sills.

14. An electric vehicle comprising:
longitudinal sills arranged on both sides of the electric vehicle,
a traction battery, arranged between said sills, for driving the electric vehicle, wherein the traction battery has a device for degassing the traction battery in case of a thermal event, and
a duct for carrying gas during degassing of the traction battery, wherein the duct is located in the electric vehicle between at least one of the longitudinal sills and the traction battery,
wherein the traction battery comprises at least one battery system, which comprises at least two battery modules,
wherein the duct is formed by a plurality of individual surfaces of the battery modules and one of the longitudinal sills.

Assignees

• Porsche Ag

Inventors

• Kellner Philipp
• Mostofi Sascha
• Volkmer Christopher

Classifications

• B60L3/0046 Primary

  relating to electric energy storage systems, e.g. batteries or capacitors · CPC title

• B60L50/66

  Arrangements of batteries · CPC title

• H01M50/204 Primary

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/3425

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title