US 12,438,229 B2
Air displacer, traction battery, production method and motor vehicle
Florian Landerer, Grafing (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/785,106
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Jan. 25, 2021, PCT No. PCT/EP2021/051563
§ 371(c)(1), (2) Date Jun. 14, 2022,
PCT Pub. No. WO2021/164984, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 10 2020 104 501.8 (DE), filed on Feb. 20, 2020.
Prior Publication US 2023/0014625 A1, Jan. 19, 2023
Int. Cl. H01M 50/383 (2021.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01)
CPC H01M 50/383 (2021.01) [H01M 50/204 (2021.01); H01M 50/249 (2021.01); H01M 2200/00 (2013.01); H01M 2220/20 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An air displacer for a traction battery of a motor vehicle, the air displacer comprising:
a vacuum bag,
a foam, which is expandable by air and is arranged in the vacuum bag, and
a manually openable air inlet point, by way of which the vacuum bag is at least partially evacuatable and is floodable with air, wherein the air displacer is transferrable from an initial state in which the vacuum bag is evacuated in a closed state of the air inlet point and the foam located in the vacuum bag is compressed, into an end state which is intended for the installed state and in which the vacuum bag is flooded with air by manual opening of the air inlet point and as a result the foam is expanded, wherein:
the air displacer is configured such that, in an installed state in a battery housing of the traction battery, the air displacer is intended to at least partially fill a free volume in the battery housing and thereby at least partially displace air in the battery housing in an event of heat generation inside the battery housing,
the air inlet point is formed as a manually activatable valve, and
the valve has a valve body and a valve seat arranged on the vacuum bag, and the valve body and the valve seat are connected by way of a bayonet closure.