Water-proof PTC air-heating heater for electric vehicle

Abstract

The invention discloses a water-proof PTC air-heating heater for an electric vehicle, comprising a PTC heating pipe and a heat dissipation bar, the PTC heating pipe comprises an elongated aluminum pipe and a PTC heating element installed in the aluminum pipe, the heat dissipation strip is fixedly connected with the upper and lower surfaces of the aluminum tube, wherein the length of the heat dissipation strip does not exceed the length of the aluminum tube, the PTC air heating heater further comprises sealing portions formed by injection molding injection molding materials on the left and right ends of the PTC heating pipes respectively, an end portion of the PTC heating pipe and a wire drawn from the end portion of the PTC heating pipe are embedded in the sealing portion and the wire extends out of the sealing portion to be electrically connected with an external current, and the sealing portion is provided with an integrally injection molded mounting position for cooperating with anautomobile mounting structure. The product of the invention has the advantages of simple structure, easy processing, convenient installation and good waterproofing performance; meanwhile, the installation position and the PTC heater are integrally injection molded, thereby greatly improving the anti-vibration performance of the product.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a PTC wind heater for waterproof electric vehicles. Background technique [0002] In the field of new energy vehicle technology, electric vehicles generally use a power battery pack (usually a lithium battery pack) as a power source. Unlike a fuel engine, an electric vehicle itself does not have a power device that generates a heat source, and cannot provide a heat source to the power battery pack. At the same time, it cannot provide a warm air heat source required for air conditioning, defrosting, etc. Therefore, electric vehicles must rely on electric energy to use special electric heating equipment for heating. At present, the optional heating devices include electric heating wire, electric heating tube and PTC (PositiveTemperature Coefficient, positive temperature coefficient) element and so on. PTC is a typical temperature-sensitive semiconductor resistor, which has the ...

AI Technical Summary

Problems solved by technology

The PTC heater disclosed in the prior art uses a sealant to solve the waterproof problem, but the sealant will age after a long time of use, and the safety is not high

At the same time, if the PTC heater is to be installed on the car, it is usually necessary to install the fixing bracket first, and then install the fixing bracket on the installation structure of the car. The fixing bracket and the PTC heater are connected twice, and it is easy to loosen under high-frequency vibration.

[0004] In addition, in the prior art, in order to prevent the temperature of the product from being too high during operation, protection components such as temperature or current protectors are installed in the mounting bracket for protection. The general technique is to first make the fixing bracket, and then place the protection components in the fixing bracket. As a result, the protective element cannot be well fixed in the fixing bracket, and at the same time, it cannot solve the waterproof problem of the protective element

Images