Directionally controlled failure of electric vehicle battery tray

Patent metadata

Field	Value
Publication number	US-11876239-B2
Application number	US-202117534164-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Nov 23, 2021
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

An electric vehicle including side impact battery pack protection mechanism for reducing damage to a battery pack in the event of a side impact, the electric vehicle including a vehicle frame, a battery pack, and one or more side impact battery pack protection brackets configured to at least of enable the vehicle battery pack to shift along a vehicle width direction or enable physical separation of the battery pack from the vehicle frame.

First claim

What is claimed is:

1. A side impact battery pack protection bracket system configured to enable an electric vehicle battery pack to shift along a vehicle width direction, the side impact battery protection bracket system comprising:
a first compression load absorption member operably coupled to a first side of an electric vehicle and a first connection member operably coupled to a first side of a battery pack, wherein the first compression load member is secured to the first connection member by a first breakaway element; and
a second compression load absorption member operably coupled to a second side of the electric vehicle and a second connection member operably coupled to a second side of the battery pack, wherein the second compression load member is secured to the second connection member by a second breakaway element;
wherein in the event of an application of an external force to a side of the electric vehicle either of the first or second breakaway elements break, thereby creating a separation between the respective compression load absorption member and connection member, while the compression load absorption member positioned on the opposite side of the battery pack compresses, thereby dissipating the external force transmitted to the battery pack and
wherein each of the first and second compression load absorption members are configured to buckle upon application of the external force of a defined magnitude, wherein the external force of the defined magnitude is lower than a force capable of deforming the battery pack.

2. The side impact battery protection bracket system of claim 1 , wherein each of the first and second compression load absorption members comprise a thin-walled structure having a plurality of walls defining a hollow interior configured to collapse upon the application of the external force of the defined magnitude.

3. The side impact battery protection bracket system of claim 1 , wherein each of the first and second compression load absorption members comprise an attachment tab configured to enable operable coupling of the compression load absorption member to the respective connection member.

4. The side impact battery protection bracket system of claim 1 , wherein the first compression load absorption member and the first connection member define a first aperture in which the first breakaway element is positioned, and wherein the second compression load absorption member and the second connection member define a second aperture in which the second breakaway element is positioned.

5. The side impact battery protection bracket system of claim 1 , wherein the first and second breakaway elements are in the form of shear pins configured to separate upon the application of a shear force of a defined magnitude.

6. The side impact battery protection bracket system of claim 1 , wherein each of the connection members define one or more steps or contours configured to correspondingly meet with one or more steps or contours defined by each of the compression load absorption members, thereby enabling a weight of the battery pack to be distributed over a surface area of the compressive load absorption members.

7. A side impact battery pack release bracket configured to enable physical separation of a battery pack from an electric vehicle, the side impact battery release bracket comprising:
a first lateral connection member operably coupled to a frame of the electric vehicle, the first lateral connection member having a first angled face positioned at an acute angle relative to a horizontal axis of the electric vehicle;
a second lateral connection member operably coupled to the battery pack, the second lateral member having a second angled face positioned configured to mate with the first angled face, such that the first and second angled faces are positioned against one another and a generally planar configuration; and
a breakaway element configured to secure the first lateral connection member to the second lateral connection member, whereupon application an external force to a side of the vehicle causes a shear force between the first angled face and the second angled face, causing the breakaway element to break into two or more parts, thereby providing a disconnection between the first lateral member and the second lateral member.

8. The side impact battery pack release bracket of claim 7 , wherein the first angled face is positioned at an angle of 45° relative to at least one of an x- or y axis of the electric vehicle.

9. The side impact battery pack release bracket of claim 7 , wherein the breakaway element is in the form of a shear pin configured to separate upon the application of a shear force of a defined magnitude.

10. The side impact battery pack release bracket of claim 7 , wherein a momentum of the battery pack can aid in separation of the battery pack from the vehicle.

11. An electric vehicle including side impact battery pack protection mechanism for reducing damage to a battery pack in the event of a side impact, the electric vehicle comprising:
a vehicle frame;
a battery pack; and
one or more side impact battery pack protection brackets configured to enable the vehicle battery pack to shift along a vehicle width direction,
wherein the one or more side impact battery pack protection brackets comprises a first compression load absorption member operably coupled to a first side of the electric vehicle and a first connection member operably coupled to a first side of the battery pack, wherein the first compression load member is secured to the first connection member by a first breakaway element; and
a second compression load absorption member operably coupled to a second side of the electric vehicle and a second connection member operably coupled to a second side of the battery pack, wherein the second compression load member is secured to the second connection member by a second breakaway element;
wherein in the event of an application of an external force to a side of the electric vehicle either of the first or second breakaway elements break, thereby creating a separation between the respective compression load absorption member and connection member, while the compression load absorption member positioned on the opposite side of the battery pack compresses, thereby dissipating the external force transmitted to the battery pack, and
wherein each of the first and second compression load absorption members are configured to buckle upon application of the external force of a defined magnitude, wherein the external force of the defined magnitude is lower than a force capable of deforming the battery pack.

12. The electric vehicle of claim 11 , wherein each of the first and second compression load absorption members comprise a thin-walled structure having a plurality of walls defining a hollow interior configured to collapse upon the application of the external force of the defined magnitude.

13. The electric vehicle of claim 11 , wherein each of the first and second compression load absorption members comprise an attachment tab configured to enable operable coupling of the compression load absorption member to the respective connection member.

14. The electric vehicle of claim 11 , wherein the first compression load absorption member and the first connection member define a first aperture in which the first breakaway element is positioned, and wherein the second compression load absorption member and the second connection member define a second aperture in which the second breakaway element is positioned.

15. An electric vehicle including side impact battery pack protection mechanism for r

Assignees

• Polestar Performance Ab

Inventors

• Wassmur Robert

Classifications

• H01M50/242 Primary

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title

• H01M50/249 Primary

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

• H01M2220/20

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

• H01M50/204

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