Electric vehicle charging system
An electric vehicle charging system includes a charging connector configured to receive a charging cable provided with electrical charging wires. The charging cable and/or the charging connector provide a flow path for guiding a liquid coolant, cooling the charging cable and/or the charging connector, and a thermal management unit for cooling the liquid coolant, the thermal management unit being fluidly connected to the flow path. The liquid coolant is an ionizable coolant, wherein a deionizing unit is provided and fluidly connected to the flow path for deionizing the liquid coolant to decrease its conductivity.
1 . An electric vehicle charging system, comprising:
a charging connector configured to receive a charging cable provided with electrical charging wires, wherein the charging cable and/or the charging connector provide a flow path for guiding a liquid coolant, for cooling the charging cable and/or for cooling the charging connector; and
a thermal management unit configured to cool the liquid coolant, the thermal management unit being fluidly connected to the flow path;
wherein the liquid coolant is an ionizable coolant; and
wherein a deionizing unit is provided and is fluidly connected to the flow path for deionizing the liquid coolant, to decrease a conductivity of the coolant,
wherein the deionizing unit is positioned downstream of the thermal management unit along the flow path.
2 . The electric vehicle charging system according to claim 1 , wherein the deionizing unit in view of the coolant flow direction is arranged in series with the thermal management unit for cooling the liquid coolant.
3 . The electric vehicle charging system according to claim 1 , wherein the deionizing unit in view of the coolant flow direction is arranged in parallel with a thermal management unit for cooling the liquid coolant.
4 . The electric vehicle charging system according to claim 3 , wherein the deionizing unit includes a controllable valve that is configured for controlling a coolant flow to the deionizing unit.
5 . The electric vehicle charging system according to claim 1 , further comprising a separate pump configured for supplying the liquid coolant to the deionizing unit.
6 . The electric vehicle charging system according to claim 1 , further comprising a conductivity measurement device that is configured for measuring a conductivity value of the liquid coolant.
7 . The electric vehicle charging system according to claim 1 , wherein the liquid coolant is water.
8 . The electric vehicle charging system according to claim 1 , wherein the liquid coolant is in direct contact with the electrical charging wires of the charging cable and/or electrical conductive parts of the charging connector.
9 . The electric vehicle charging system according to claim 8 , wherein the liquid coolant is in direct contact with the electrical wires of the charging cable at a return flow path directed to the thermal management unit.
10 . The electric vehicle charging system according to claim 6 , wherein the conductivity measurement device is positioned upstream of the thermal management unit along the flow path.
11 . The electric vehicle charging system according to claim 1 , further comprising a coolant tank, wherein:
the flow path is a first flow path;
the electric vehicle charging system further comprises a second flow path separate from the first flow path and fluidly connected to the first flow path by the coolant tank; and
the deionizing unit is positioned in the second flow path.