Battery cooling
First Claim
Patent Images
1. A battery cooling system, comprising:
- a cooling fluid circulation path thermally coupled to a working fluid flow path and to at least one battery cell in a battery pack;
a pump that maintains a fluid flow through the working fluid flow path;
an evaporator that operates in the critical flow regime of the working fluid and generates a compression wave that shocks the maintained fluid flow, thereby changing the pressure of the maintained fluid flow to cool the fluid, the fluid flow provided to the evaporator by the pump without passing through a heater; and
a heat exchanging mechanism thermally coupled to the fluid flow path, the heat exchanging mechanism removing heat from the battery pack.
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Abstract
A battery cooling system operates by pumping liquid through a cooling fluid circulation path. Because the battery cooling system pumps liquid, the compression system that generates the cooling power does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the cooling system operates in the critical flow regime in which the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to an increased pressure.
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Citations
20 Claims
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1. A battery cooling system, comprising:
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a cooling fluid circulation path thermally coupled to a working fluid flow path and to at least one battery cell in a battery pack; a pump that maintains a fluid flow through the working fluid flow path; an evaporator that operates in the critical flow regime of the working fluid and generates a compression wave that shocks the maintained fluid flow, thereby changing the pressure of the maintained fluid flow to cool the fluid, the fluid flow provided to the evaporator by the pump without passing through a heater; and a heat exchanging mechanism thermally coupled to the fluid flow path, the heat exchanging mechanism removing heat from the battery pack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A battery cooling system, comprising:
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a fluid flow path that passes in close proximity to at least one battery cell in a battery pack; a pump that maintains a fluid flow through the fluid flow path; and at least one evaporator that operates in the critical flow regime of the fluid and generates a compression wave that shocks the maintained fluid flow, thereby changing the pressure of the maintained fluid flow to cool the fluid, the cooled fluid removing heat from the battery cell via conduction, the fluid flow provided to the evaporator by the pump without passing through a heater. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification