CN202602242U - Self-recovery over-current and over-temperature protective device - Google Patents
Self-recovery over-current and over-temperature protective device Download PDFInfo
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- CN202602242U CN202602242U CN 201220210789 CN201220210789U CN202602242U CN 202602242 U CN202602242 U CN 202602242U CN 201220210789 CN201220210789 CN 201220210789 CN 201220210789 U CN201220210789 U CN 201220210789U CN 202602242 U CN202602242 U CN 202602242U
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Abstract
The utility model relates to a self-recovery over-current and over-temperature protective device, which comprises a positive temperature coefficient thermal resistor and a temperature fuse, wherein the positive temperature coefficient (PTC) thermal resistor and the temperature fuse are thermally coupled and connected in series with each other. Preferably, the self-recovery over-current and over-temperature protective device further comprises a temperature fuse base; the temperature fuse is arranged in the temperature fuse base; the PTC thermal resistor comprises a PTC conducive polymer chip, a first metal foil and a second metal foil; the first metal foil and the second metal foil are jointed on the upper and lower surfaces of the PTC conducive polymer chip respectively; and the temperature fuse base is overlapped on the first metal foil. The self-recovery over-current and over-temperature protective device is skillful in design, and is simple in structure; when a PTC thermal resistor falls into a potential failure mode, a circuit of the PTC thermal resistor is prevented from being short-circuited, and is only switched off, so that a micro motor or electric circuit equipment is protected; and the self-recovery over-current and over-temperature protective device has the advantages of low cost, short protecting time, easiness in using and the like, and is suitable for large-scale popularization and application.
Description
Technical field
The utility model relates to the electronic component technology field, particularly is used for the electronic component technology field of circuit overcurrent, excess temperature and overload protection, specifically is meant a kind of from recovering excess-current excess-temperature protection device.
Background technology
Positive temperature coefficient (PTC, Positive Temperature Coefficient) performance thermistor has been widely used in the circuit protection in the 6C industrial fields such as computer, communication, consumer electronics, automobile, path, digital content.Its operation principle is: when the circuit operate as normal, and PTC thermistor resistance R
0The very little electric current that do not hinder passes through; And when overcurrent, overload or fault such as overheated appearred in circuit, the thermistor gauge surface temperature rose rapidly, and moment rises to high-impedance state when surpassing switch temperature, thereby in time the restricting circuits electric current is to very low-level protective circuit; After fault was got rid of, the PTC thermistor cooled off rapidly and returns to former low resistive state, and circuit recovers this thermistor of normal back and can reuse once more.
At present overcurrent/over-temperature protection device generally adopts bimetal leaf thermal circuit beraker or semistor in the auto electric circuit, on the automobile with small household appliances in the micromachine rotation-clogging protection device that uses adopt bimetal leaf thermal circuit beraker or semistor equally.But; The bimetal leaf thermal circuit beraker can the interval property not reset when fault is got rid of; Cause its contact to be prone to burn or weld dead; Have the danger of circuit arrangement overcurrent damage like this, and the electromagnetic interference that produces when resetting possibly cause the bimetallic thermal circuit beraker incompatible with electronic control system, thereby have potential safety hazard greatly; And semistor is not got rid of because of fault, under the long-time "on" position, because of aftercurrent being arranged himself through generating heat; Cause accumulation of heat, its potential failure mode is burning, because of the decision of semistor characteristic; After the burning of himself macromolecular material, there is certain probability conducting in the two ends metal electrode material, forms short circuit; Thereby the same danger that exists the circuit arrangement overcurrent damage, thereby has big potential safety hazard.So no matter adopt the bimetallic thermal circuit beraker still be semistor as overcurrent/over-temperature protection device in the auto electric circuit, in a single day potential failure mode takes place in it, all will have certain probability and cause short circuit, has potential safety hazard greatly.
Therefore, need provide a kind of from recovering excess-current excess-temperature protection device, after in a single day potential failure mode appearred in semistor, its circuit short-circuit condition can not occur, only off state can occur, thereby protected micromachine or electric circuit equipment.
The utility model content
The purpose of the utility model is to have overcome above-mentioned shortcoming of the prior art, provides a kind of from recovering excess-current excess-temperature protection device, and it is ingenious that this recovers excess-current excess-temperature protection designs certainly; Simple for structure, after in a single day potential failure mode appearred in semistor, its circuit short-circuit condition can not occur; Only off state can appear; Thereby protection micromachine or electric circuit equipment have advantages such as cost is low, guard time fast, use is simple, are suitable for large-scale promotion application.
To achieve these goals, the excess-current excess-temperature of recovery certainly of the utility model protection device is characterized in, comprises semistor and Thermal Cutoffs, said semistor and said Thermal Cutoffs thermal coupling and be connected in series.
Preferably; The said excess-current excess-temperature protection device that recovers certainly also comprises the Thermal Cutoffs pedestal; Said Thermal Cutoffs is installed in the said Thermal Cutoffs pedestal; Said semistor comprises PTC electric conductive polymer chip, first metal forming and second metal forming, and said first metal forming and said second metal forming are fitted in respectively on the upper surface and lower surface of said PTC electric conductive polymer chip, and said Thermal Cutoffs pedestal overlays on said first metal forming.
More preferably, said first metal forming and said second metal forming are single hair side metal forming.
More preferably, the thickness of said PTC electric conductive polymer chip is 0.05 ~ 5mm.
More preferably; Said Thermal Cutoffs pedestal comprises insulating barrier, first conductive layer, second conductive layer and the 3rd conductive layer; Said first conductive layer and said second conductive layer are fitted on the upper surface of said insulating barrier and through said Thermal Cutoffs and interconnect; Said the 3rd conductive layer is fitted on the lower surface of said insulating barrier and with said first conductive layer conduction and is connected, and said the 3rd conductive layer is fitted on said first metal forming.
Further, vertically be provided with through hole on the said insulating barrier, the sidewall of said through hole is provided with conductive wall, and said the 3rd conductive layer is connected with said first conductive layer conduction through said conductive wall.
Further, said the 3rd conductive layer and said first metal forming welding.
Further, said insulating barrier is a prepreg, and said first conductive layer, said second conductive layer and said the 3rd conductive layer are copper coins.
Further; The said excess-current excess-temperature protection device that recovers certainly also comprises insulation elastic gel layer; Be connected with first electrode on said second metal forming; Be connected with second electrode on said second conductive layer, said insulation elastic gel layer is coated on the outside of said Thermal Cutoffs, said Thermal Cutoffs pedestal and said semistor, and said first electrode and said second electrode wear out said insulation elastic gel layer.
Especially more preferably, said first electrode is welded on said second metal forming, and said second electrode is welded on said second conductive layer.
The beneficial effect of the utility model specifically is: the excess-current excess-temperature of recovery certainly of the utility model protection device comprises semistor and Thermal Cutoffs, said semistor and said Thermal Cutoffs thermal coupling and be connected in series, thus in a single day potential failure mode appears in semistor; Will cut off electric current in the circuit fully, circuit is formed protection, improve security performance; Design ingenious; Simple for structure, after in a single day potential failure mode appearred in semistor, its circuit short-circuit condition can not occur; Only off state can appear; Thereby protection micromachine or electric circuit equipment have advantages such as cost is low, guard time fast, use is simple, are suitable for large-scale promotion application.
Description of drawings
Fig. 1 is the circuit theory sketch map of the utility model.
Fig. 2 a be the utility model a specific embodiment overlook partial schematic sectional view.
Fig. 2 b is the side-looking cross-sectional schematic of the specific embodiment shown in Fig. 2 a.
Fig. 2 c is the schematic perspective view of the semistor of the specific embodiment shown in Fig. 2 a.
Fig. 2 d is the schematic perspective view one of the Thermal Cutoffs pedestal of the specific embodiment shown in Fig. 2 a.
Fig. 2 e is the schematic perspective view two of the Thermal Cutoffs pedestal of the specific embodiment shown in Fig. 2 a.
Fig. 2 f is that the Thermal Cutoffs pedestal shown in Fig. 2 e overlays the schematic perspective view on the semistor shown in Fig. 2 c.
Fig. 2 g is the schematic top plan view that first electrode and second electrode are installed on the structure shown in Fig. 2 f.
Fig. 2 h is the schematic side view in the structure shown in Fig. 2 f.
Fig. 2 i is the schematic top plan view of mounting temperature fuse on the structure shown in Fig. 2 g.
Embodiment
In order more to be expressly understood the technology contents of the utility model, the special following examples of lifting specify.Wherein identical parts adopt identical Reference numeral.
See also shown in Fig. 1-Fig. 2 i, the excess-current excess-temperature of recovery certainly of the utility model protection device comprises semistor 1 and Thermal Cutoffs 2, and said semistor 1 is with said Thermal Cutoffs 2 thermal couplings and be connected in series.
Said can have any suitable structure from recovering excess-current excess-temperature protection device; See also shown in Fig. 2 a-Fig. 2 i; In the specific embodiment of the utility model; The said excess-current excess-temperature protection device that recovers certainly also comprises Thermal Cutoffs pedestal 3, and said Thermal Cutoffs 2 is installed in the said Thermal Cutoffs pedestal 3, and said semistor 1 comprises PTC electric conductive polymer chip 11, first metal forming 12 and second metal forming 13; Said first metal forming 12 is fitted in respectively on the upper surface and lower surface of said PTC electric conductive polymer chip 11 with said second metal forming 13, and said Thermal Cutoffs pedestal 3 overlays on said first metal forming 12.
Said first metal forming 12 can be any suitable metal forming with said second metal forming 13.See also shown in Fig. 2 a-Fig. 2 i, in the specific embodiment of the utility model, said first metal forming 12 is single hair side metal forming with said second metal forming 13.
The thickness of said PTC electric conductive polymer chip 11 can be any suitable thickness, sees also shown in Fig. 2 a-Fig. 2 i, and in the specific embodiment of the utility model, the thickness of said PTC electric conductive polymer chip 11 is 0.05 ~ 5mm.
Said Thermal Cutoffs pedestal 3 can have any suitable structure; See also shown in Fig. 2 a-Fig. 2 i; In the specific embodiment of the utility model; Said Thermal Cutoffs pedestal 3 comprises insulating barrier 31, first conductive layer 32, second conductive layer 33 and the 3rd conductive layer 34; Said first conductive layer 32 and said second conductive layer 33 are fitted on the upper surface of said insulating barrier 31 and through said Thermal Cutoffs 2 and interconnect, and said the 3rd conductive layer 34 is fitted on the lower surface of said insulating barrier 31 and with said first conductive layer, 32 conductions and is connected, and said the 3rd conductive layer 34 is fitted on said first metal forming 12.
Said the 3rd conductive layer 34 is connected with said first conductive layer, 32 conductions can adopt any suitable structure; See also shown in Fig. 2 a-Fig. 2 i; In the specific embodiment of the utility model; Vertically be provided with through hole 35 on the said insulating barrier 31, the sidewall of said through hole 35 is provided with the conductive wall (not shown), and said the 3rd conductive layer 34 is connected with said first conductive layer, 32 conductions through said conductive wall.
Said the 3rd conductive layer 34 is fitted on said first metal forming 12 can adopt any suitable structure, see also shown in Fig. 2 a-Fig. 2 i, and in the specific embodiment of the utility model, said the 3rd conductive layer 34 and 12 welding of said first metal forming.
Said insulating barrier 31, said first conductive layer 32, said second conductive layer 33 and said the 3rd conductive layer 34 can be any suitable components; See also shown in Fig. 2 a-Fig. 2 i; In the specific embodiment of the utility model; Said insulating barrier 31 is prepregs, and said first conductive layer 32, said second conductive layer 33 and said the 3rd conductive layer 34 are copper coins.
In order to realize good insulation property; See also shown in Fig. 2 a-Fig. 2 i; In the specific embodiment of the utility model; The said excess-current excess-temperature protection device that recovers certainly also comprises insulation elastic gel layer 4, is connected with first electrode 5 on said second metal forming 13, is connected with second electrode 6 on said second conductive layer 33; Said insulation elastic gel layer 4 is coated on the outside of said Thermal Cutoffs 2, said Thermal Cutoffs pedestal 3 and said semistor 1, and said first electrode 5 wears out said insulation elastic gel layer 4 with said second electrode 6.
Be connected with first electrode 5 on said second metal forming 13; Be connected with second electrode 6 on said second conductive layer 33; Can adopt any suitable structure, see also shown in Fig. 2 a-Fig. 2 i, in the specific embodiment of the utility model; Said first electrode 5 is welded on said second metal forming 13, and said second electrode 6 is welded on said second conductive layer 33.
Certainly the manufacturing that recovers excess-current excess-temperature protection device of above-mentioned leading foot type structure is summarized as follows:
At first; With after the raw materials mix such as one or more crystalline polymers, conducting filler and processing aid through processing modes such as twin-screw extrusion calendaring process upper and lower surfaces be first metal forming 12, below be second metal forming 13, middle for thickness is the laminated type thin slice of the ptc characteristics electric conductive polymer chip 11 of 0.05 ~ 5mm, form the semistor 1 shown in Fig. 2 c through machining modes such as die-cut or cutting-ups then;
Thereafter; Through cover first conductive layer 32 and second conductive layer 33 at insulating barrier 31 upper surfaces; Cover the 3rd conductive layer 34 at lower surface; Through etching, boring, heavy copper, surface treatment and cut or PCB manufacturing process such as die-cut processes and produces Thermal Cutoffs pedestal 3, the lower surface figure of Thermal Cutoffs pedestal 3 is shown in Fig. 2 d, and its upper surface figure is shown in Fig. 2 e; Its overall dimension is consistent with above-mentioned semistor 1 overall dimension, and the 3rd conductive layer 34 and first conductive layer 32 be mutual conduction through conductive wall in the through hole 35;
Then, semistor 1 that will be shown in Fig. 2 c and the Thermal Cutoffs pedestal 3 shown in Fig. 2 e are through modes such as the Reflow Soldering stack shown in Fig. 2 f that links into an integrated entity, and the 3rd conductive layer 34 is fitted on first metal forming 12;
Then, on second metal forming 13 of above-mentioned combination upper and lower surface and second conductive layer 33 respectively through inserting first electrode 5 and second electrode 6 and linking into an integrated entity shown in Fig. 2 g and Fig. 2 h through soldering mode such as immersed solder and stack shown in Fig. 2 f;
Then, on above-mentioned combination that Thermal Cutoffs 2 is good shown in Fig. 2 i through soldering mode such as Reflow Soldering and first conductive layer 32 and 33 welding of second conductive layer;
At last; Through modes such as brushing, spraying, dip-coating, showerings; With the above-mentioned i.e. stack outer wrap one deck insulation elastic gel layer 4 of first electrode 5 and second electrode 6 of extraction electrode that has, at last with the thin slice curing of the above-mentioned elastic gel of wrap insulate layer 4 promptly shown in Fig. 2 a and Fig. 2 b.
Here; Only be aimed at its manufacturing process of product concrete structure explanation; The concrete parameter of each operation is not done careful explanation, to those skilled in the art, the concrete parameter of each operation be know or can obtain through simple work; And to those skilled in the art; Operations such as cross-linking radiation wherein, heat treatment, gluing can be according to electric property (like resistance-temperature characteristics, current characteristics, the voltage-current characteristic) requirement of concrete element, but the order suitable part exchange, so do not give unnecessary details.
Other are irregular like cylindrical, the square bodily form and other and above-mentioned semistor 1 and Thermal Cutoffs pedestal 3 also can be made.
The composition element that the utility model adopts semistor 1 and Thermal Cutoffs 2 to utilize the mode of thermal coupling to be chained together is realized overcurrent and overload protection in micromachine stall or the electric circuit.Potential failure mode state (being that semistor 1 self temperature will just fired state can occur above 240 ℃) in a single day appears in the semistor 1 that adopts in the utility model structure; So 240 ℃ of the temperature of the thermal cut temperature of selecting Thermal Cutoffs 2 when making semistor 1 potential failure mode occur; Can make the utility model composition element be lower than under the thermal cut temperature environment of Thermal Cutoffs 2 and can normally use like this; In case semistor 1 occurs under the potential failure mode state; Thermal Cutoffs 2 comes fusing-off temperature fuse 2 through the heat that semistor 1 burning produces; Cut off circuital current fully, circuit is formed protection.
Like this, in contrast to simple employing semistor 1 as overcurrent/overload protection arrangement in micro motor stall or the electric circuit, the following advantage of the utility model:
(1), in a single day potential failure mode appear in semistor 1, will cut off electric current in the circuit fully, and circuit is formed protection, improves security performance;
(2), cost is low, use is simple etc.
To sum up, the excess-current excess-temperature of recovery certainly of the utility model protection designs is ingenious, simple for structure; After in a single day potential failure mode appears in semistor; Its circuit short-circuit condition can not occur, only off state can occur, thus protection micromachine or electric circuit equipment; Have advantages such as cost is low, guard time fast, use is simple, be suitable for large-scale promotion application.
In this specification, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and the scope of the utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (10)
1. one kind from recovering excess-current excess-temperature protection device, it is characterized in that, comprises semistor and Thermal Cutoffs, said semistor and said Thermal Cutoffs thermal coupling and be connected in series.
2. according to claim 1 from recovering excess-current excess-temperature protection device; It is characterized in that; The said excess-current excess-temperature protection device that recovers certainly also comprises the Thermal Cutoffs pedestal; Said Thermal Cutoffs is installed in the said Thermal Cutoffs pedestal; Said semistor comprises PTC electric conductive polymer chip, first metal forming and second metal forming, and said first metal forming and said second metal forming are fitted in respectively on the upper surface and lower surface of said PTC electric conductive polymer chip, and said Thermal Cutoffs pedestal overlays on said first metal forming.
3. according to claim 2 from recovering excess-current excess-temperature protection device, it is characterized in that said first metal forming and said second metal forming are single hair side metal forming.
4. according to claim 2 from recovering excess-current excess-temperature protection device, it is characterized in that the thickness of said PTC electric conductive polymer chip is 0.05 ~ 5mm.
5. according to claim 2 from recovering excess-current excess-temperature protection device; It is characterized in that; Said Thermal Cutoffs pedestal comprises insulating barrier, first conductive layer, second conductive layer and the 3rd conductive layer; Said first conductive layer and said second conductive layer are fitted on the upper surface of said insulating barrier and through said Thermal Cutoffs and interconnect; Said the 3rd conductive layer is fitted on the lower surface of said insulating barrier and with said first conductive layer conduction and is connected, and said the 3rd conductive layer is fitted on said first metal forming.
6. according to claim 5 from recovering excess-current excess-temperature protection device; It is characterized in that; Vertically be provided with through hole on the said insulating barrier, the sidewall of said through hole is provided with conductive wall, and said the 3rd conductive layer is connected with said first conductive layer conduction through said conductive wall.
7. according to claim 5 from recovering excess-current excess-temperature protection device, it is characterized in that said the 3rd conductive layer and said first metal forming are welded.
8. the excess-current excess-temperature protection device that recovers certainly according to claim 5 is characterized in that said insulating barrier is a prepreg, and said first conductive layer, said second conductive layer and said the 3rd conductive layer are copper coins.
9. according to claim 5 from recovering excess-current excess-temperature protection device; It is characterized in that; The said excess-current excess-temperature protection device that recovers certainly also comprises insulation elastic gel layer; Be connected with first electrode on said second metal forming; Be connected with second electrode on said second conductive layer, said insulation elastic gel layer is coated on the outside of said Thermal Cutoffs, said Thermal Cutoffs pedestal and said semistor, and said first electrode and said second electrode wear out said insulation elastic gel layer.
10. the excess-current excess-temperature protection device that recovers certainly according to claim 9 is characterized in that said first electrode is welded on said second metal forming, and said second electrode is welded on said second conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210789 CN202602242U (en) | 2012-05-10 | 2012-05-10 | Self-recovery over-current and over-temperature protective device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220210789 CN202602242U (en) | 2012-05-10 | 2012-05-10 | Self-recovery over-current and over-temperature protective device |
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| CN202602242U true CN202602242U (en) | 2012-12-12 |
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| CN 201220210789 Expired - Lifetime CN202602242U (en) | 2012-05-10 | 2012-05-10 | Self-recovery over-current and over-temperature protective device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667350A (en) * | 2018-07-11 | 2018-10-16 | 广州森宝电器股份有限公司 | A kind of starter with defencive function |
| CN108879604A (en) * | 2018-08-07 | 2018-11-23 | 赵云文 | Single-phase electrical appliance crosses heat overload protector |
| CN110267424A (en) * | 2019-05-15 | 2019-09-20 | 浙江凯耀照明股份有限公司 | A kind of safety control after thermistor PTC failure |
| CN110785822A (en) * | 2017-05-24 | 2020-02-11 | Tdk电子股份有限公司 | Electrical component with a securing element |
-
2012
- 2012-05-10 CN CN 201220210789 patent/CN202602242U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110785822A (en) * | 2017-05-24 | 2020-02-11 | Tdk电子股份有限公司 | Electrical component with a securing element |
| US11740280B2 (en) | 2017-05-24 | 2023-08-29 | Tdk Electronics Ag | Electric component with fail safe element |
| CN108667350A (en) * | 2018-07-11 | 2018-10-16 | 广州森宝电器股份有限公司 | A kind of starter with defencive function |
| CN108667350B (en) * | 2018-07-11 | 2024-07-19 | 广州森宝电器股份有限公司 | Starter with protection function |
| CN108879604A (en) * | 2018-08-07 | 2018-11-23 | 赵云文 | Single-phase electrical appliance crosses heat overload protector |
| CN110267424A (en) * | 2019-05-15 | 2019-09-20 | 浙江凯耀照明股份有限公司 | A kind of safety control after thermistor PTC failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201518, Hongguang Road, 8001 dry Lane, Shanghai, Jinshan District Patentee after: Shanghai he Hong electronic Polytron Technologies Inc Address before: 201518, Hongguang Road, 8001 dry Lane, Shanghai, Jinshan District Patentee before: Shanghai H-Fast Electronic Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |