| 摘要 |
The present invention provides a positive temperature coefficient (PTC) heating device with a cathode oxygen depletion (COD) function for a fuel cell vehicle, which can improve durability of a fuel cell stack by reacting residual oxygen with hydrogen to be consumed as heat and improve cold startability by rapidly heating a coolant even at a temperature below the freezing point, the PTC heating device including a housing having an inlet and an outlet, formed on both ends there of, and a PTC heater fixed in the inside of the housing and including an electrode to which electric power is applied from the outside, a PTC heating element disposed on the electrode, and an insulating tape for insulating the PTC heater from a coolant flowing in the housing. Accordingly, it is possible to improve electrical safety and heat transfer performance and effectively prevent bubbles from forming, compared with a conventional cartridge heater. Moreover, the present invention provides the PTC heating device which includes at least one radiating plate including a plurality of radiating fins having concave and convex. Furthermore, the PTC heating element included in the PTC heater is inserted between two electrodes and the insulating tape is arranged on the surfaces of both sides of the electrodes. As a result, it is possible to improve heat transfer efficiency. In addition, the present invention provides the PTC heating device, in which a PWM control system is provided on the outside of the housing to control a heating current, thus facilitating the control of the surface temperature.
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