US 2026/0106187 A1Published application

Coolant drain system of ion filter

AssigneesHyundai Motor Company, Kia Corporation

InventorsHae Lee LEE, Dong Nyeok PARK, Dae Jung KIM, Ju Eon CHA

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Abstract

A coolant drain system of an ion filter may prevent deterioration in filtration performance of an ion exchange resin and improve durability thereof. The coolant drain system is operated in such that, when electrical conductivity of coolant circulating through a fuel cell stack is equal to or higher than a predetermined level, the coolant circulates through the inside of the ion filter such that metal ions of the coolant are easily removed by the ion exchange resin. When electrical conductivity of the coolant is reduced to be lower than the predetermined level, the coolant remaining inside the ion filter is drained to a pressurized reservoir using the pressure of air supplied from the pressurized reservoir.

Claims20

Dependent claims

A coolant drain system comprising:

a coolant circulation line configured to allow coolant to circulate through a fuel cell stack, a radiator, and a pump;
a first control valve mounted on the coolant circulation line between a coolant outlet port of the pump and a coolant inlet port of the fuel cell stack;
a second control valve mounted on the coolant circulation line between a coolant outlet port of the radiator and a coolant inlet port of the pump;
a coolant branch line configured to allow the coolant to circulate through the first control valve, an ion filter, and the second control valve;
a pressurized reservoir mounted on the coolant branch line between a coolant outlet port of the ion filter and the second control valve;
an air supply line configured to supply air from the pressurized reservoir to an inside of the ion filter;
and
a controller configured to control:
a first opening/closing direction of the first control valve;
and
a second opening/closing direction of the second control valve.

8 more elements

A coolant drain system comprising:

a coolant circulation line configured to allow coolant to circulate through a fuel cell stack, a radiator, and a pump;
a first control valve mounted on the coolant circulation line between a coolant outlet port of the pump and a coolant inlet port of the fuel cell stack;
a second control valve mounted on the coolant circulation line between a coolant outlet port of the radiator and a coolant inlet port of the pump;
a coolant branch line configured to allow the coolant to circulate through the first control valve, an ion filter, and the second control valve;
a pressurized reservoir mounted on the coolant branch line between the ion filter and the second control valve;
a first air flow connector formed on the pressurized reservoir;
a second air flow connector formed on the ion filter, wherein the first air flow connector and the second air flow connector are connected to each other to allow the pressurized reservoir to supply air to an inside of the ion filter;
a first coolant flow connector formed on the ion filter;
a second coolant flow connector formed on the pressurized reservoir, wherein the first coolant flow connector and the second coolant flow connector are connected to each other to allow the coolant to flow from the ion filter to the pressurized reservoir;
and
a controller configured to control:
a first opening/closing direction ;
of the first control valve;
and
a second opening/closing direction of the second control valve.

12 more elements

Dependencies are inferred from the claim text.