BATTERY PACK WITH A FIRE PREVENTING AGENT

• US 20150056482A1
• Filed: 04/24/2012
• Published: 02/26/2015
• Est. Priority Date: 04/24/2012
• Status: Abandoned Application

• Current Assignee: Valmet Automotive Oy
• Original Assignee: Valmet Automotive Oy
• Inventors: Kyla-Kaila, Jyri, Sjoberg-Eerola, Pia, Kopra, Lasse, Kanniainen, Panu
• Application Number:
  US14/395,682
• Publication Number:
  US 20150056482A1
• Time in Patent Office: Days
• US Class Current: 429/61
• CPC Class Codes: A62C 2/065 having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
• CPC Class Codes: A62C 3/07 in vehicles, e.g. in road vehicles
• CPC Class Codes: A62C 3/16 in electrical installations, e.g. cableways
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/658 by thermal insulation or shielding
• CPC Class Codes: H01M 2200/10 Temperature sensitive devices
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/249 specially adapted for aircraft or vehicles, e.g. cars or trains constructional details of batteries specially adapted for electric vehicles B60L50/64
• CPC Class Codes: H01M 50/293 characterised by the material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A battery pack having one or more battery cells, a shell enclosing the one or more battery cells, wherein at least part of the shell is separated in space with one or more battery cells, and a fire preventing and restricting agent placed between the shell and one or more battery cells. The fire preventing and restricting agent includes thermally expandable agent which is capable of preventing, retarding and/or extinguishing a fire in the battery pack by filling the space between the shell and one or more battery cells.

Claims

1. A battery pack, comprising:

one or more battery cells,

a shell enclosing the one or more battery cells, wherein at least part of the shell is separated in space with said one or more battery cells, and

a fire preventing and restricting agent placed between the shell and said one or more battery cells, so that the battery cells are encapsulated by said fire preventing and restricting agent, characterized in that the fire preventing and restricting agent comprises thermally expandable agent; and

that the fire preventing and restricting agent is applied to the inner surface of the shell so that an empty space is left between the fire preventing and restricting agent and the battery cells for the provision of air or liquid cooling in said space in normal battery operation mode, said thermally expandable agent being capable of preventing, retarding and/or extinguishing a fire in the battery pack by expanding and filling the space between the shell and said one or more battery cells in response to overheating of the cells.

2. The battery pack of claim 1, characterized in that the thermally expandable agent is thermally expandable graphite.

3. The battery pack of claim 1, characterized in that the at least one battery cell is a Lithium-Ion battery cell.

4. The battery pack of claim 1, characterized in that the battery pack is a battery pack of an electric vehicle.

5. The battery pack of claim 2, characterized in that the at least one battery cell is a Lithium-Ion battery cell.

6. The battery pack of claim 2, characterized in that the battery pack is a battery pack of an electric vehicle.

7. The battery pack of claim 3, characterized in that the battery pack is a battery pack of an electric vehicle.