Cooling circuit with cooling fluid for lithium batteries, and a vehicle comprising said cooling circuit
First Claim
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1. A cooling circuit with cooling fluid for lithium ion batteries comprising:
- a battery pack comprising a plurality of cells electrically connected to each other, suitable for powering an electric machine for traction,said cells being perimetrally delimited by outer walls,at least one bag containing cooling fluid associated with contact with said outer walls of the cells,wherein said at least one bag is made of electrically insulating and deformable material so as to be counter-shaped to said outer walls to adhere perimetrally to said outer walls,circulation member that acts to force the cooling fluid through said at least one bag,wherein spacers are arranged between the cells adjacent to each other, said spacers acting to create abutments for the packing of the cells composing the battery pack, wherein the bag interposed between adjacent cells has a thickness/shape less than that of an interspace between the adjacent cells, so that the bag is not compressed between adjacent cells,wherein said bag is associated with a plurality of connecting elements suitable for performing an anchorage between the bag and the outer walls of the cells, andwherein the connecting elements are hollow bushings which are crossed by the cooling fluid which are arranged in direct contact with the outer walls of the cells, so as to allow, at the bushes, a direct contact between the coolant and the outer walls of the cells.
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Abstract
A cooling circuit with cooling liquid for lithium-ion batteries comprising a battery pack comprising a plurality of cells electrically connected with each other, suitable for powering an electric machine for traction. The cells are perimetrically delimited by external walls. At least one bag contains cooling liquid associated in contact with the outer walls of the cells. The bag is made of deformable plastic material so as to be counter-shaped to the outer walls to adhere perimetrally to the outer walls and the circuit provides forced circulation of the cooling liquid through said at least one bag.
44 Citations
17 Claims
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1. A cooling circuit with cooling fluid for lithium ion batteries comprising:
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a battery pack comprising a plurality of cells electrically connected to each other, suitable for powering an electric machine for traction, said cells being perimetrally delimited by outer walls, at least one bag containing cooling fluid associated with contact with said outer walls of the cells, wherein said at least one bag is made of electrically insulating and deformable material so as to be counter-shaped to said outer walls to adhere perimetrally to said outer walls, circulation member that acts to force the cooling fluid through said at least one bag, wherein spacers are arranged between the cells adjacent to each other, said spacers acting to create abutments for the packing of the cells composing the battery pack, wherein the bag interposed between adjacent cells has a thickness/shape less than that of an interspace between the adjacent cells, so that the bag is not compressed between adjacent cells, wherein said bag is associated with a plurality of connecting elements suitable for performing an anchorage between the bag and the outer walls of the cells, and wherein the connecting elements are hollow bushings which are crossed by the cooling fluid which are arranged in direct contact with the outer walls of the cells, so as to allow, at the bushes, a direct contact between the coolant and the outer walls of the cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A cooling circuit with cooling fluid for lithium ion batteries comprising:
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a battery pack comprising a plurality of cells electrically connected to each other, suitable for powering an electric machine for traction, said cells being perimetrally delimited by outer walls, at least one bag containing cooling fluid associated with contact with said outer walls of the cells, wherein said at least one bag is made of electrically insulating and deformable material so as to be counter-shaped to said outer walls to adhere perimetrally to said outer walls, a circulation member that acts to force the cooling fluid through said at least one bag, said circulation member including, a flexible lung which pressurises the liquid inside said circuit, so as to favour contact between the cooling liquid and the outer walls of the cells, said flexible lung including a tubular elastic inserted around the bag which in turn envelops the battery pack or the individual cells so as to influence the bag in contact with said outer walls of the cells to be cooled, and wherein spacers are arranged between the cells adjacent to each other, said spacers acting to create abutments for the packing of the cells composing the battery pack, wherein the bag interposed between adjacent cells has a thickness/shape less than that of an interspace between the adjacent cells, so that the bag is not compressed between adjacent cells.
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17. A cooling circuit with cooling fluid for lithium ion batteries comprising:
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a battery pack comprising a plurality of cells electrically connected to each other, suitable for powering an electric machine for traction, said cells being perimetrally delimited by outer walls, at least one bag containing cooling fluid associated with contact with said outer walls of the cells, wherein said at least one bag is made of electrically insulating and deformable material so as to be counter-shaped to said outer walls to adhere perimetrally to said outer walls, a circulation member that acts to force the cooling fluid through said at least one bag, said circulation member including, a flexible lung which pressurises the liquid inside said circuit, so as to favour contact between the cooling liquid and the outer walls of the cells, said flexible lung including a containment structure arranged around the bag so as to influence the bag in abutment against the outer walls of the cells to be cooled, wherein said containment structure encloses an elastic membrane which on the one hand interfaces with the bag and on the other is elastically influenced in compression against the bag by an elastic membrane such as springs and/or pressurised fluids, and wherein spacers are arranged between the cells adjacent to each other, said spacers acting to create abutments for the packing of the cells composing the battery pack, wherein the bag interposed between adjacent cells has a thickness/shape less than that of an interspace between the adjacent cells, so that the bag is not compressed between adjacent cells.
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Specification