CN203368775U

CN203368775U - PTC heater for electric car

Info

Publication number: CN203368775U
Application number: CN 201320281056
Authority: CN
Inventors: 姜文中
Original assignee: SUZHOU XINYE ELECTRONIC CO Ltd
Current assignee: SUZHOU XINYE ELECTRONICS CO., LTD.
Priority date: 2013-05-22
Filing date: 2013-05-22
Publication date: 2013-12-25
Anticipated expiration: 2023-05-22

Abstract

The utility model relates to a PTC heater for an electric car. The PTC heater comprises a PTC heating assembly and a heat dissipation assembly bonded to the outer surface of the PTC heating assembly. The PTC heating assembly includes an aluminium tube, a PTC heating sheet arranged inside the aluminium tube, and a piece of insulated paper coating the PTC heating sheet. The PTC heating sheet is provided with an upper electrode surface and a lower electrode surface; and electrode slices are arranged at the upper electrode surface and the lower electrode surface. One surface of the insulated paper is contacted and connected with the inner wall of the aluminium tube; and an insulated substrate is arranged between the insulated paper and the PTC heating sheet. According to the embodiment of the utility model, because an aluminium oxide substrate is arranged at the outer side of the PTC heating sheet and a polyimide film is combined, the leakage current of the heater can be ensured to be lower than 4mA; the insulated effect is good; the service life of the heater is prolonged; and the demand of the electric car can be satisfied. The PTC heating assembly and a cooling aluminum strip are bonded by a thermally conductive silicone rubber, thereby ensuring thermal conductivity between the aluminium tube and the heat dissipation assembly.

Description

The used for electric vehicle ptc heater

Technical field

The utility model relates to a kind of ptc heater, relates in particular to a kind of used for electric vehicle ptc heater.

Background technology

The PTC ceramic heating element has following characteristics:

1. there is the temp auto-controlled function, can be not overheated, use safe and reliable;

2. operating voltage is floated and is changed, very little on its heating power impact;

3. along with ambient temperature rises, can automatically reduce heating power, there is energy-conservation effect;

4. heating up, it is fast to heat speed;

5. as ceramic semiconductors, structure is relatively stable, long service life.

There are above characteristics just because of the PTC ceramic heating element, much heat components and parts and all adopt the PTC ceramic heating element.Common ptc heater is generally used for the field of household appliances such as domestic air conditioning, warm-air drier and super bath on the market at present, and voltage is commonly the alternating voltage of 220VAC, to safety and reliability etc., requires relatively low.

The operating voltage of electric automobile is direct voltage, and voltage is generally higher, and generally, between 360V-650V, PTC works for a long time under higher direct voltage, very high to the requirement of the stability of the PTC of its inside pottery and heater structure and fail safe.

The relative ordinary electrical home appliance product of the ptc heater environment for use complexity of using in the electric automobile field, and require higher useful life.And the ptc heater of field of household appliances application at present adopts polyimide film as insulating material, this material does not reach the insulation property requirement of used for electric vehicle heater.

The utility model content

The purpose of this utility model is to overcome the defect that prior art exists, and a kind of used for electric vehicle ptc heater is provided.

The technical scheme that realizes the utility model purpose is: the used for electric vehicle ptc heater, comprise PTC heat generating component and the radiating subassembly that is adhered to PTC heat generating component outer surface, the PTC heat generating component comprises aluminum pipe, is arranged at the insulating paper of PTC fever tablet and the coating PTC fever tablet of aluminum pipe inside, the PTC fever tablet is provided with power on pole-face and bottom electrode face, power on pole-face and bottom electrode face and be provided with electrode slice, the insulating paper one side is connected with the contact of aluminum pipe inwall, between insulating paper and PTC fever tablet, also is provided with insulating substrate.

Further, described insulating substrate is alumina substrate.

Further, described alumina substrate thickness is 0.2～2mm.

Further, described insulating paper is polyimide film.

Further, described electrode slice is adhered on power on pole-face and the bottom electrode face of PTC fever tablet by heat conductive silica gel, and described insulating substrate is adhered on electrode slice by heat conductive silica gel

The utlity model has positive effect: simple and reasonable, PTC fever tablet arranged outside has alumina substrate, and in conjunction with the polyimide film that coats the PTC fever tablet, make ptc heater can bear the Hi-pot test of 2300V, guarantee that its leakage current is lower than 4mA, insulation effect is good, improve product useful life, can meet the needs of electric automobile, on the other hand, bonding by heat conductive silica gel between PTC heat generating component and heat radiation aluminum strip, guarantee the thermal conductivity between aluminum pipe and radiating subassembly.

The accompanying drawing explanation

For content of the present utility model more easily is expressly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein:

Fig. 1 is structural representation of the present utility model.

Wherein: 1, electrode slice, 2, the PTC fever tablet, 3, aluminum pipe, 4, radiating subassembly, 5, polyimide film, 6, alumina substrate.

Embodiment

Embodiment 1

As shown in Figure 1, the utlity model has the used for electric vehicle ptc heater, comprise PTC heat generating component and the radiating subassembly 4 that is adhered to PTC heat generating component outer surface, the PTC heat generating component comprises aluminum pipe 3, be arranged at the polyimide film 5 of PTC fever tablet 2 and the coating PTC fever tablet 2 of aluminum pipe 3 inside, PTC fever tablet 2 is provided with power on pole-face and bottom electrode face, power on pole-face and bottom electrode face and be provided with electrode slice 1, the one side of polyimide film 5 is connected with aluminum pipe 3 inwall contacts, the alumina substrate 6 that also to be provided with thickness between polyimide film 5 and PTC fever tablet 2 be 0.2mm.

The present embodiment PTC fever tablet 2 arranged outside have alumina substrate 6, and in conjunction with the polyimide film 5 that coats PTC fever tablet 2, make ptc heater can bear the Hi-pot test of 2300V, guarantee that its leakage current is lower than 4mA, insulation effect is good, improves product useful life, can meet the needs of electric automobile, on the other hand, bonding by heat conductive silica gel between PTC heat generating component and heat radiation aluminum strip, guarantee the thermal conductivity between aluminum pipe 3 and radiating subassembly 4.

Embodiment 2

As preferred embodiment, all the other are identical with embodiment 1, and difference is, electrode slice 1 is adhered on power on pole-face and the bottom electrode face of PTC fever tablet 2 by heat conductive silica gel, and alumina substrate 6 thickness are 2mm and are adhered on electrode slice 1 by heat conductive silica gel.

The present embodiment electrode slice 1 closely bonds by heat conductive silica gel and fever tablet 2, has guaranteed its conductivity and thermal conductivity, and alumina substrate 6 is bonded on electrode slice 1 by heat conductive silica gel, has guaranteed its thermal conductivity, reduces thermal resistance, improves insulation property, increases the service life.

Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims

1. used for electric vehicle ptc heater, it is characterized in that, comprise PTC heat generating component and the radiating subassembly that is adhered to PTC heat generating component outer surface, the PTC heat generating component comprises aluminum pipe, is arranged at the insulating paper of PTC fever tablet and the coating PTC fever tablet of aluminum pipe inside, the PTC fever tablet is provided with power on pole-face and bottom electrode face, power on pole-face and bottom electrode face and be provided with electrode slice, the insulating paper one side is connected with the contact of aluminum pipe inwall, between insulating paper and PTC fever tablet, also is provided with insulating substrate.

2. used for electric vehicle ptc heater according to claim 1, is characterized in that, described insulating substrate is alumina substrate.

3. used for electric vehicle ptc heater according to claim 2, is characterized in that, described alumina substrate thickness is 0.2～2mm.

4. used for electric vehicle ptc heater according to claim 1, is characterized in that, described insulating paper is polyimide film.

5. according to the arbitrary described used for electric vehicle ptc heater of claim 1-3, it is characterized in that, described electrode slice is adhered on power on pole-face and the bottom electrode face of PTC fever tablet by heat conductive silica gel, and described insulating substrate is adhered on electrode slice by heat conductive silica gel.