US 12,288,901 B2
Disconnection device comprising a heat activatable element
Emmanuelle Garitte, St Medard en Jalles (FR); Philippe Borel, Bruges (FR); Dinh An Nguyen, Pessac (FR); Mélanie Dendary, Eysines (FR); and Laure Le Guenne, Blanquefort (FR)
Assigned to SAFT, Levallois-Perret (FR)
Appl. No. 17/782,419
Filed by SAFT, Levallois-Perret (FR)
PCT Filed Nov. 30, 2020, PCT No. PCT/EP2020/083977
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/110606, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 1913899 (FR), filed on Dec. 6, 2019.
Prior Publication US 2023/0016438 A1, Jan. 19, 2023
Int. Cl. H01M 10/653 (2014.01); H01M 50/581 (2021.01)
CPC H01M 50/581 (2021.01) [H01M 10/653 (2015.04); H01M 2200/10 (2013.01)] 15 Claims
 
1. A battery comprising:
i. at least two electrochemical cells (d) which are connected to each other by an inter-cell connecting part (c), each electrochemical cell comprising a container, said container comprising:
α) an opening for introducing an electrochemical plate group,
β) a bottom,
γ) a side wall,
δ) At least two current output terminals;
ii. a material having a thermal conductivity less than or equal to 0.5 W/(m*K) disposed between the at least two electrochemical cells, and
iii. at least one disconnection device for physically disconnecting said at least two electrochemical cells which are connected to each other by the inter-cell connection part, said device comprising:
a heat-activatable element (a) capable of deforming when a temperature thereof reaches a threshold value,
the heat-activatable element being arranged such that, when its temperature reaches said threshold value, it disconnects by its deformation the inter-cell connecting part (c) from at least one of the electrochemical cells (d), said heat-activatable element not participating in the conduction of an electrical current when said electrochemical cells are traversed by an electrical current, said heat-activatable element being placed in contact with the inter-cell connection part (c) and a current output terminal.