CN108418195A - A kind of vehicle-mounted PTC protectors - Google Patents
A kind of vehicle-mounted PTC protectors Download PDFInfo
- Publication number
- CN108418195A CN108418195A CN201710345322.3A CN201710345322A CN108418195A CN 108418195 A CN108418195 A CN 108418195A CN 201710345322 A CN201710345322 A CN 201710345322A CN 108418195 A CN108418195 A CN 108418195A
- Authority
- CN
- China
- Prior art keywords
- ptc
- vehicle
- protectors
- chip
- metal pins
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
Abstract
The invention discloses a kind of vehicle-mounted PTC protectors; include one more than PTC chip described at least two PTC chips and number ratio metal pins; the metal pins are stacked gradually with the PTC chip to be connect and is separated by two pins of a pin and interconnect, so that PTC chip is in parallel connection.The present invention is using multi-chip over-current protection structure in parallel; on the one hand the room temperature resistance of protection element can be substantially reduced; extend the trigger protection time that stall occurs for vehicle-mounted middle and small motor; on the other hand; proof voltage grade is identical as the proof voltage grade of independent chip; to which the vehicle-mounted protector of small size of low temperature resistance, high proof voltage grade can be obtained, to suitable for the narrow vehicular applications environment with high current of installation space.
Description
Technical field
The present invention relates to technical field of semiconductors, more particularly to a kind of vehicle-mounted PTC protectors.
Background technology
The polymer base conductive composite material being blended by polymer and conductive filler, resistance usually have with temperature
Non-linear relation, with the raising of temperature, the thermal expansion of polymeric matrix leads to spacing increase between conductive particle so that material
Volume resistivity increases, and when ambient temperature is close to polymer matrix bulk melting point, matrix thermally expands the most notable at this time, conductive
Intergranular is away from drastically being widened, and therefore, the volume resistivity of conducing composite material will appear the increase of several orders of magnitude, that is, occur
PTC (resistance positive temperature coefficient) effect.This kind of composite conducting polymer material is in electronic circuit protection element, heater, sensing
There are many applications in the fields such as device.
With the increase of vehicle-mounted middle-size and small-size direct current generator miniaturization and torque, inside leave the installation space of protector for
It is smaller and smaller.Compared to thickness direction, reduces length and wide size is particularly urgent, in other words, vehicle-mounted protector is not reducing electricity
Under the premise of gas characteristic, long and wide size is reduced, the competitiveness of PTC protector schemes will be significantly greatly increased.The electricity of vehicle-mounted protector
Gas performance includes room temperature resistance and proof voltage grade, and room temperature resistance has negative correlation with stress levels.For a certain specific
Polymer base conductive composite material for, using traditional single-chip over-current protection structure (as shown in Figure 1, by PTC chip
13 and the pin 11,12 of its both sides form), it tends to be difficult to while meeting low temperature resistance (room temperature resistance be lower, when trigger protection
Between it is longer) and high proof voltage grade；Low temperature resistance is such as met, PTC effects are often weaker, and proof voltage grade is very low,
After being prepared into PTC protectors, during protection itself it is easy to appear burn piece burn phenomena such as.
Invention content
The object of the present invention is to provide a kind of vehicle-mounted protector, the smaller length of the element and wide size, lower room temperature electricity
Resistance is suitable for the narrow vehicular applications environment with high current of installation space.
The technical solution adopted by the present invention is that：
A kind of vehicle-mounted PTC protectors, it is characterised in that：It is more including PTC chip described at least two PTC chips and number ratio
One metal pins, the metal pins stack gradually two pins for connecting and being separated by a pin with the PTC chip
It interconnects.
The PTC chip is by fluoropolymer based conductive composite material and double layer of metal electricity with positive temperature coefficient effect
Pole foil composition, fluoropolymer based conductive composite material are placed between the double layer of metal electrode foil；Each PTC chip passes through both sides
Metal electrode foil connect with metal pins.
Preferably, the PTC chip quantity with positive temperature coefficient effect is between 2-5.
Preferably, the vehicle-mounted PTC protectors, overall thickness is between 1.2-6.0mm.
Preferably, the vehicle-mounted PTC protectors, the area of PTC chip is in 30-400mm2Between.
Preferably, the vehicle-mounted PTC protectors, metal pins thickness is between 0.25-1.0mm.
Vehicle-mounted PTC protectors of the present invention, it is characterised in that：The fluoropolymer based conductive composite material,
Its fluoropolymer can be polyvinylidene fluoride, polyvinyl fluoride, polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer, fluorine-containing third
It is one or more in olefin(e) acid copolymer, fluorinated ethylene propylene (FEP), vinylidene fluoride-hexafluoropropylene copolymer.
Vehicle-mounted PTC protectors of the present invention, it is characterised in that：The fluoropolymer based conductive composite material,
Its conductive filler can be any one in carbon black, carbon fiber, metal powder and metallic fiber.
On the one hand the present invention can substantially reduce the room temperature of protection element using multi-chip over-current protection structure in parallel
Resistance extends the trigger protection time that stall occurs for vehicle-mounted middle and small motor, on the other hand, proof voltage grade and independent chip
Proof voltage grade is identical, to which the vehicle-mounted protector of small size of low temperature resistance, high proof voltage grade can be obtained.
Description of the drawings
The structural schematic diagram of the existing vehicle-mounted PTC protectors of Fig. 1.
The structural schematic diagram of the vehicle-mounted PTC protectors of Fig. 2 embodiment of the present invention 1.
The structural schematic diagram of the vehicle-mounted PTC protectors of Fig. 3 embodiment of the present invention 2.
Specific implementation mode
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, with the technical solution that the present invention will be described in detail.
Embodiment 1
As shown in Fig. 2, the vehicle-mounted PTC protectors of the present invention, including metal pins 21, metal pins 22 and metal pins
23 and two PTC chips 24 and 25 with positive temperature coefficient effect.
One of them PTC chip 24 with positive temperature coefficient effect is between metal pins 21 and 22, another tool
There is the PTC chip 25 of positive temperature coefficient effect between metal pins 22 and 23, PTC chip is combined with adjacent metal pins
Face is linked together by scolding tin.
21 side of metal pins has bending, bending part to link together by soldering with metal pins 23.
It is 0.5mm that metal pins, which use H65 copper materials, single metal pin thickness,；Single PTC chip thickness is 0.4mm,
Area is 120mm2。
The core material of PTC chip is that the polymer-matrix electric conduction formed with conductive black melt blending by Kynoar matrix is answered
Condensation material forms；The double layer of metal electrode foil of polymer base conductive composite material upper and lower surface is double side nickel-plated copper foil material, thick
Degree is 32-35 microns；Double side nickel-plated copper foil is combined together by way of hot pressing with polymer base conductive composite material.
This structure with 2 PTC chip parallel connections, overall thickness can significantly reduce entire PTC and protect in 2.3-2.8mm
The resistance for protecting device, to which under the premise of identical electrical characteristic, the length of PTC protectors and wide size can be with smallers.
Embodiment 2
As shown in figure 3, the vehicle-mounted PTC protectors of the present invention, including metal pins 31, metal pins 32, metal pins 33
With metal pins 34 and three PTC chips 35,36 and 37 with positive temperature coefficient effect.
PTC chip 37 with positive temperature coefficient effect has positive temperature coefficient effect between metal pins 31 and 32
The PTC chip 36 answered is between metal pins 32 and 33, and the PTC chip 35 with positive temperature coefficient effect is between metal pins
Between 33 and 34, PTC chip is linked together by scolding tin with adjacent metal pins faying face.
Metal pins 31 and 34 side ends have bending, bending part to be connected by scolding tin with 32 respectively at metal pins 33
Together.
Metal pins plate copper material using iron, and thickness of coated copper layer is in 0.3-0.5 microns, single metal pin thickness
0.5mm；Single PTC chip thickness is 0.4mm, area 70mm2。
The core material of PTC chip is the two-component polymer matrix formed by Kynoar, ethylene-tetrafluoroethylene copolymer
It is formed with the polymer base conductive composite material that conductive black melt blending is formed；Polymer base conductive composite material upper and lower surface
Double layer of metal electrode foil be double side nickel-plated copper foil material, thickness be 38-42 microns；The side that double side nickel-plated copper foil passes through hot pressing
Formula is combined together with polymer base conductive composite material.
This structure with 3 PTC chip parallel connections, overall thickness can significantly reduce entire PTC and protect in 3.2-3.6mm
The resistance for protecting device, to which under the premise of identical electrical characteristic, the length of PTC protectors and wide size can be with smallers.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (8)
1. a kind of vehicle-mounted PTC protectors, it is characterised in that：Including more than PTC chip described at least two PTC chips and number ratio one
A metal pins, the metal pins stack gradually the two pin phases for connecting and being separated by a pin with the PTC chip
Interconnection is connected together.
2. vehicle-mounted PTC protectors according to claim 1, it is characterised in that：The PTC chip is by with positive temperature coefficient
The fluoropolymer based conductive composite material and double layer of metal electrode foil of effect form, and fluoropolymer based conductive composite material is set
Between the double layer of metal electrode foil；Each PTC chip is connect by the metal electrode foil of both sides with metal pins.
3. vehicle-mounted PTC protectors according to claim 1, it is characterised in that：PTC chip with positive temperature coefficient effect
Quantity is between 2-5.
4. vehicle-mounted PTC protectors according to claim 1, it is characterised in that：The vehicle-mounted PTC protectors, total thickness
Degree is between 1.2-6.0mm.
5. vehicle-mounted PTC protectors according to claim 1, it is characterised in that：The vehicle-mounted PTC protectors, PTC cores
The area of piece is in 30-400mm2Between.
6. vehicle-mounted PTC protectors according to claim 1, it is characterised in that：The vehicle-mounted PTC protectors, metal
Pin thickness is between 0.25-1.0mm.
7. vehicle-mounted PTC protectors according to claim 2, it is characterised in that：The fluoropolymer base conduction is compound
Material, fluoropolymer is polyvinylidene fluoride, polyvinyl fluoride, polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer, fluorine-containing
It is one or more in acrylic copolymer, fluorinated ethylene propylene (FEP), vinylidene fluoride-hexafluoropropylene copolymer.
8. vehicle-mounted PTC protectors according to claim 2, it is characterised in that：The fluoropolymer base conduction is compound
Material, conductive filler are any one or more in carbon black, carbon fiber, metal powder and metallic fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710345322.3A CN108418195A (en) | 2017-05-16 | 2017-05-16 | A kind of vehicle-mounted PTC protectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710345322.3A CN108418195A (en) | 2017-05-16 | 2017-05-16 | A kind of vehicle-mounted PTC protectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108418195A true CN108418195A (en) | 2018-08-17 |
Family
ID=63125394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710345322.3A Pending CN108418195A (en) | 2017-05-16 | 2017-05-16 | A kind of vehicle-mounted PTC protectors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108418195A (en) |
-
2017
- 2017-05-16 CN CN201710345322.3A patent/CN108418195A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 200083 806, floor 8, No. 125, Liuying Road, Hongkou District, Shanghai Applicant after: Shanghai Wei'an Electronic Co.,Ltd. Address before: 201202 Shanghai city Pudong New Area Town Road No. 1001 to seven Shiwan Applicant before: Shanghai Changyuan Wayon Circuit Protection Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant after: Shanghai Weian Electronics Co.,Ltd. Address before: 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant before: Shanghai Wei'an Electronic Co.,Ltd. |
|
| CB02 | Change of applicant information |