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US 10,593,921 B2Granted
Intumescent battery housing
AssigneeUrsatech Ltd.
InventorsJohn B. Page, Xiaoxiong Luo
Life of this patent
Estimating the term…
Abstract
A battery housing has a body and a lid mateable with the body. The body and the lid, when mated, provide a chamber dimensioned to hold at least one battery; and a venting passageway from the chamber. At least a portion of at least one of the body and the lid comprises an intumescent flame retardant material with an expansion ratio sufficient to drive gas from the chamber through the venting passageway and to seal the chamber when the material intumesces in the event of thermal runaway of a battery housed in the chamber.
Claims25
A battery housing comprising:
- a first housing portion;
- a second housing portion mateable with said first housing portion;
- said first housing portion and said second housing portion, when mated, providing:
- a battery chamber dimensioned to hold at least one battery;
- and
- a venting passageway from said battery chamber;
- at least a wall in a portion of at least one of said first housing portion and said second housing portion comprising an intumescent flame retardant material with an expansion ratio sufficient to drive gas from said battery chamber through said venting passageway and to seal said battery chamber, when said material intumesces in the event of thermal runaway of the at least one battery housed in said battery chamber,
- a first metal plug embedded in said first housing portion so as to extend from said battery chamber to an exterior of said housing and a second metal plug embedded in said second housing portion so as to extend from said battery chamber to an exterior of said housing, said first metal plug and said second metal plug for providing an electrical connection to the at least one battery housed in said battery chamber,
- at least one of said first housing portion or said second housing portion further providing a powder chamber for storing a powder, said powder chamber having a plurality of openings for expelling stored powder out of said battery housing in the event of thermal runaway.
6 more elements
A battery housing comprising:
- a first housing portion;
- a second housing portion mateable with said first housing portion;
- said first housing portion and said second housing portion, when mated, providing:
- a battery chamber dimensioned to hold at least one battery;
- and
- a venting passageway from said battery chamber;
- at least a wall in a portion of at least one of said first housing portion and said second housing portion comprising an intumescent flame retardant material with an expansion ratio sufficient to drive gas from said battery chamber through said venting passageway and to seal said battery chamber, when said material intumesces in the event of thermal runaway of the at least one battery housed in said battery chamber,
- at least one of said first housing portion or said second housing portion further providing a powder chamber for storing a powder, said powder chamber having a plurality of openings for expelling stored powder out of said battery housing in the event of thermal runaway,
- wherein said venting passageway is blocked by a blockage that fails when exposed to pressure created in said battery chamber by said thermal runaway, and
- wherein said blockage is formed from an identical material to that of a material forming one of said first housing portion and said second housing portion.
7 more elements
A battery housing comprising:
- a first housing portion;
- and
- a second housing portion mateable with said first housing portion;
- said first housing portion and said second housing portion, when mated, providing:
- a battery chamber dimensioned to hold at least one battery;
- and
- a venting passageway from said battery chamber;
- at least a wall in a portion of at least one of said first housing portion and said second housing portion comprising an intumescent flame retardant material with an expansion ratio sufficient to drive gas from said battery chamber through said venting passageway and to seal said battery chamber, when said intumescent flame retardant material intumesces in the event of thermal runaway of the at least one battery housed in said battery chamber;
- and
- at least one of said first housing portion or said second housing portion further providing a powder chamber for storing a powder, said powder chamber having a plurality of openings for expelling stored powder out of said battery housing in the event of thermal runaway.
7 more elements
Dependencies are inferred from the claim text.