CN109216128A - A kind of high voltage direct current thermal cut-off - Google Patents
A kind of high voltage direct current thermal cut-off Download PDFInfo
- Publication number
- CN109216128A CN109216128A CN201710522884.0A CN201710522884A CN109216128A CN 109216128 A CN109216128 A CN 109216128A CN 201710522884 A CN201710522884 A CN 201710522884A CN 109216128 A CN109216128 A CN 109216128A
- Authority
- CN
- China
- Prior art keywords
- high voltage
- direct current
- voltage direct
- thermal cut
- current thermal
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
- H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/06—Fusible members characterised by the fusible material
Abstract
The present invention provides a kind of high voltage direct current thermal cut-off comprising fusible component；Fuse chamber, and it is intracavitary that fusible component is sealed in the fusing；And two pins；Fusible component includes that connected n conduct piece and n-1 fusible alloy linkage section, n are spaced between two fusible alloy support arms and two support arms is natural number, and each fusible alloy linkage section is arranged between two conduct pieces；Two pins are respectively connected to two support arms.Fusible alloy is set the several segments mutually separated with conduct piece by high voltage direct current thermal cut-off of the invention, so as to shorten the contraction speed of fusible alloy.Therefore it can be applied to the Thermal protection on high voltage direct current power device, when abnormal heating occurs in power device, and temperature reaches the operating temperature point of fusible alloy, cutting, the safety of protection circuit can be performed quickly in high voltage direct current thermal cut-off of the invention.
Description
Technical field
The present invention relates to a kind of fuse, a kind of particularly high voltage direct current thermal cut-off.
Background technique
Since 2014, domestic electric automobile market entered the fast-developing phase, it is contemplated that the following 5-10 will become electronic
The important period of vehicle industrialization, market or blowout will occurs.China is as the maximum market of global electric vehicle, China in 2015
New-energy automobile production and marketing is respectively to have reached 340,000 and 330,000, increases by 3.3 and 3.4 times on a year-on-year basis.Whole year in 2016, China are new
Energy automobile add up sales volume reached 50.7 ten thousand, increase by 53% on a year-on-year basis, it is contemplated that 2017 and the year two thousand twenty new-energy automobile sales volume can
To reach 750,000 and 2,000,000, permeability is expected to reach 6% in the year two thousand twenty, and the whole nation pushes away new-energy automobile on a large scale
Extensively, Industrial Cycle degree is constantly promoted.
Battery is always component of greatest concern in electric vehicle.But in the selection of battery pack, Chinese depot and foreign country
Depot has selected a visibly different road.The highest vehicle of existing market occupation rate is that wind (leaf), battery are listened in daily output
Group voltage is 360Vdc；The i-MiEV of Mitsubishi is 300Vdc；7000 18650 lithium electricity composition tesla's battery voltage also only
There is 400Vdc.But foreign vendor is compared, the battery voltage of domestic electric vehicle is much higher, such as the battery pack electricity of the BYD Qin
Pressure is 560Vdc, and the battery voltage of Tang is 700Vdc.
There are two benefits for battery voltage height, first is that energy/power consumption penalty is small, second is that motor drive efficiency is higher.It improves
This will be a trend to voltage, should also be a developing direction from now on.In the identical situation of output power, increase battery
Group voltage can reduce operating current.But this is bigger to peripheral components performance requirement/cost impact, for higher voltage
Battery pack, the protection device for circuit requires dedicated high tension apparatus.
Chinese patent 201420230161.5 discloses a kind of high voltage direct current Thermal Cutoffs, is only in current industry
It can reach the high voltage direct current heat protective device of 15A 450Vdc.But the voltage setting of domestic mainstream depot battery pack is all
500Vdc or more, therefore it is badly in need of a kind of protection device of high voltage direct current in the market.
Summary of the invention
In order to solve the above-mentioned existing problems, the object of the present invention is to provide a kind of high voltage direct current thermal cut-ofves, for institute
Circuit need to be protected to provide a kind of effective Thermal protection execution lockout mode.
The purpose of the present invention is realized by following technical proposal:
A kind of high voltage direct current thermal cut-off includes: fusible component；Fuse chamber, and it is intracavitary that fusible component is sealed in the fusing；With
And two pins；Fusible component includes that n connected conduction is spaced between two fusible alloy support arms and two support arms
Part and n-1 fusible alloy linkage section, n are natural number；When n is greater than or equal to 2, each fusible alloy linkage section is arranged two
Between a conduct piece；Two pins are respectively connected to two support arms.
Further, two support arms are parallel to each other.
Further, fusible component is U-shaped, M shape, S-shaped or trapezoidal-structure.
It further, further include collets, the collets are arranged between two support arms, and separate two pins.It rises
To the effect of elongating arc length, increase the insulation tolerance of pin in arc extinction.
Further, fuse further includes shell and bottom plate, and collets are arranged on bottom plate, fusing chamber by shell, bottom plate,
Collets and two pins surround.
Further, a conduct piece is connected between two support arms.Material that theoretically can be conductive can all apply this hair
Bright conduct piece, the material preferably as pin.
Further, connect that there are two conduct piece and be arranged between two conduct pieces one are meltable between two support arms
Alloy linkage section.
Further, two pins are perpendicular to support arm.
Further, when n is greater than or equal to 3, different fusible alloy linkage sections can have different sectional areas, sectional area
The operating temperature of small fusible alloy linkage section is higher than the operating temperature of the big fusible alloy linkage section of sectional area.It can be in unit bodies
While improving through-flow in product, the ability of raising cutting high voltage, the small fusible alloy of the sectional area high as operating temperature,
After other fusible alloys disconnect, the small fusible alloy of sectional area can quickly shrink cutting electricity under the action of temperature and electric current
Arc.
Further, support arm connects section surface with fusible alloy coated with fluxing disconnected agent.
Further, including more fusible components in parallel.
Further, the conduct piece of more fusible component medium potentials in parallel can integrate.It include one when more
When the fusible component parallel connection of a conduct piece, all conduct pieces can be integrated into an entirety；It include the easy of multiple conduct pieces when more
When molten Components Parallel Connection, equipotential conduct piece can be integrated into an entirety.Which simplify structure, processing is more easier.
Further, nonmetallic diaphragm is set in fusing chamber, fusing chamber is divided into the inner cavity sealed against each other and exocoel,
Fluxing disconnected agent is accommodated in interior intracavitary, outer intracavitary setting quartz sand.In high voltage applications, arc cutting is easy to produce fluxing disconnected agent
Angerization, expansion, the absorbable gasification bring impact of quartz sand, and the transmission path of electric arc is covered, and be conducive to open circuit point
Insulation pressure resistance.
Further, support arm and/or fusible alloy linkage section are tubular structure, are equipped with fluxing disconnected agent among pipe.It can be with
The surface oxide layer of more effective activation fusible alloy, plays the role of quick breaking arc.
Further, the junction of support arm, fusible alloy linkage section and conduct piece is equipped with connecting hole, and conduct piece is placed in this
Welded in connecting hole, this welding manner than fusible alloy and conduct piece be all interplanar welding manner it is more preferable.
Further, the external connection of pin is waveform close to the fusing chamber side, is drawn in parallel far from fusing chamber side
Out.
Beneficial effects of the present invention:
Fusible alloy is set the several segments mutually separated with conduct piece by high voltage direct current thermal cut-off of the invention, thus
Shorten the contraction speed of fusible alloy.Therefore it can be applied to the Thermal protection on high voltage direct current power device, when power device occurs
Abnormal heating, when temperature reaches the operating temperature point of fusible alloy, high voltage direct current thermal cut-off of the invention can rapidly be held
Row cutting, the safety of protection circuit.
Detailed description of the invention
Below in conjunction with following drawings, the invention will be further described, in which:
Fig. 1 is the diagrammatic cross-section of the high voltage direct current thermal cut-off of embodiment according to the present invention 1；
Fig. 2 is the decomposition diagram of the high voltage direct current thermal cut-off of embodiment according to the present invention 1；
Fig. 3 is the diagrammatic cross-section of the high voltage direct current thermal cut-off of embodiment according to the present invention 2；
Fig. 4 is the diagrammatic cross-section of the high voltage direct current thermal cut-off of embodiment according to the present invention 3；
Fig. 5 illustrates one embodiment of pin according to the present invention.
Wherein:
101 shells
102 bottom plates
103 left pins
104 right pins
105 first support arms
106 conduct pieces
107 second support arms
108 fluxing disconnected agent
109 packaging plastics
110 nonmetallic diaphragms
111 quartz sands
112 collets
201 shells
202 bottom plates
203 left pins
204 right pins
205 first support arms
206 first conduct pieces
207 fusible alloy linkage sections
208 second conduct pieces
209 second support arms
210 fluxing disconnected agent
211 packaging plastics
212 collets
Specific embodiment
Embodiment 1
As shown in Figure 1, 2, high voltage direct current thermal cut-off includes nonmetallic shell 101, bottom plate 102 and is arranged in bottom plate
Collets 112 on 102, shell 101 and bottom plate 102 are sealed with packaging plastic 109.Shell 101, bottom plate 102, left pin
103, right pin 104, collets 112 surround fusing chamber, and sealed set has two fusible components in the fusing chamber.Fusible component
For U-shaped structure, including parallel first support arm 105 and second support arm 107 for fusible alloy, surface is coated with fluxing disconnected agent
108.It is attached between first support arm 105 and second support arm 107 with conduct piece 106.Collets 112 are arranged in first support arm
Between 105 and second support arm 107, and separate left pin 103 and right pin 104.Left pin 103 and right pin 104 are perpendicular to
One support arm 105 and second support arm 107 are arranged, and 103 one end of left pin is connected to the first support arm 105 of fusible component, the other end from
Shell 101 stretches out.Right 104 one end of pin is connected to the second support arm 107 of fusible component, and the other end is stretched out from shell 101.Zuo Yin
Foot 103, first support arm 105, conduct piece 106, second support arm 107, right pin 104 are successively electrically connected, and form the knot of double breaking points
Structure.Fusible component is set as two sections and does not contact and parallel fusible alloy, and conduct piece is equipped between two sections of fusible alloys as bridge
It connects, forms electrical connection.
When Thermal protection applied to the power device of high-tension line, when power device occurs abnormal, temperature anomaly is increased,
By the heat transmitting of left pin 103, right pin 104 and shell 101, temperature is transferred to fluxing disconnected agent 106 and fusible alloy, will help
Fusing agent 106 switchs to liquid by solid-state, starts the oxide layer for activating fusible alloy surface.Fusible alloy reaches movement temperature in temperature
Spend to two pins direction and shrink, the too long fusible alloy contraction speed of length can be slack-off, apply in high voltage configuration can not and
When cut off high voltage.First support arm 105 and second support arm 107 with same action temperature reach movement temperature absorbing heat
It when spending, while being shunk to the metalwork of two sides, ensure that cut-off point in parallel organization region, improves electric field strength, accelerates band
The diffusion velocity of electron ion, while fusible alloy length is shortened, it is formed simultaneously multi-break, increases pressure drop loss, reduces electric arc
Energy, be more advantageous to cutting high voltage circuit.
Embodiment 2
High voltage direct current thermal cut-off as shown in Figure 3 is the variant of embodiment 1, on the basis of embodiment 1, by diaphragm knot
Structure is used in double-breakpoint structure, in the outer layer for the first support arm 105 and second support arm 107 for being coated with fluxing disconnected agent 108, is utilized
Fusing chamber is divided into the inner cavity sealed against each other and exocoel by diaphragm 110, and quartz sand 111 is arranged in exocoel, and fluxing disconnected agent 108 is held
It sets in the lumen, the two partition.It prevents fluxing disconnected agent 108 from penetrated into quartz sand 111 at high temperature, has also prevented quartz sand
111 penetrate fluxing disconnected agent 108 and destroy the surface structure of fusible component.
In fusing process, multibreak cutting is carried out, the further deterioration of electric arc is prevented.It shrinks and fuses in fusible alloy
When, high-voltage arc, the open circuit point of instantaneous galvanic corrosion fusible alloy are generated, moment forms gasification, expansion, formed to nonmetallic diaphragm
108 impacts, under the action of shock wave, nonmetallic 108 fragmentation of diaphragm, quartz sand 109 falls covering fusible alloy, interdicts high pressure
Electric arc forms multibreak, and moment extinguishes electric arc, can effectively cut off circuit.
Embodiment 3
As shown in figure 4, can set fusible alloy to be more segmented according to the size that need to cut off voltage.High voltage direct current heat
Fuse includes nonmetallic shell 201, the collets 212 of bottom plate 202 and setting on the lower plate 202 there, shell 201 and bottom plate
202 are sealed with packaging plastic 211.Shell 201, bottom plate 202, left pin 203, right pin 204, collets 212 surround fusing
Chamber, sealed set has fusible component in the fusing chamber.Fusible component is U-shaped structure, including it is parallel be the of fusible alloy
One support arm 205 and second support arm 209 are connected with spaced first conduct piece between first support arm 205 and second support arm 209
206, fusible alloy linkage section 207, the second conduct piece 208.The setting of collets 212 first support arm 205 and second support arm 209 it
Between, and separate left pin 203 and right pin 204.Left pin 203 and right pin 204 are perpendicular to first support arm 205 and second support arm
209 settings, 203 one end of left pin are connected to the first support arm 205 of fusible component, and the other end is stretched out from shell 201.Right pin
204 one end are connected to the second support arm 209 of fusible component, and the other end is stretched out from shell 201.Left pin 203, first support arm 205,
First conduct piece 206, fusible alloy linkage section 207, the second conduct piece 208, second support arm 209, right pin 204 successively electrically connect
It connects, forms multibreak structure, and coat on the surface of first support arm 205, fusible alloy linkage section 207 and second support arm 209
Fluxing disconnected agent 210, wherein first support arm 205, fusible alloy linkage section 207 and the operating temperature having the same of second support arm 209,
When fusing at the same time, multibreak point structure is formed, while increasing pressure drop loss, the energy of electric arc is reduced, can efficiently perform
Thermal protection.
Fig. 4 illustrates one embodiment of pin, and as can be seen from the figure the external connection of pin is close to the fusing chamber
Side is waveform, and distal end is parallel to draw.
Hereinafter, the present invention is specifically described by way of examples with reference to the accompanying drawings, involved embodiment is only
It for the preferred embodiment of the present invention, is not intended to restrict the invention, although having been carried out specifically referring to embodiment to the present invention
Bright, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments,
Or equivalent replacement of some of the technical features, but all within the spirits and principles of the present invention, it is made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of high voltage direct current thermal cut-off, comprising:
Fusible component；
Fuse chamber, and it is intracavitary that the fusible component is sealed in the fusing；
And two pins；
It is characterized in that, the fusible component includes being spaced to be connected between two fusible alloy support arms and two support arms
N conduct piece and n-1 fusible alloy linkage section, the n be natural number；It is each described meltable when n is greater than or equal to 2
Alloy linkage section is arranged between two conduct pieces；Described two pins are respectively connected to two support arms.
2. high voltage direct current thermal cut-off according to claim 1, which is characterized in that two support arms are parallel to each other.
3. high voltage direct current thermal cut-off according to claim 2, which is characterized in that the fusible component is U-shaped, M shape, S
Shape or trapezoidal-structure.
4. high voltage direct current thermal cut-off according to claim 2 or 3, which is characterized in that it further include collets, the insulation
Block is arranged between two support arms, and separates described two pins.
5. high voltage direct current thermal cut-off according to claim 4, which is characterized in that the fuse further includes shell and bottom
Plate, the collets are arranged on the bottom plate, and the fusing chamber is by the shell, the bottom plate, collets and described
Two pins surround.
6. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that two support arms it
Between be connected with a conduct piece.
7. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that two support arms it
Between connection there are two conduct piece and a fusible alloy linkage sections being arranged between two conduct pieces.
8. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that two pins hang down
Directly in the support arm.
9. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that when n is greater than or equal to 3
When, different fusible alloy linkage sections have different sectional areas, and the operating temperature of the small fusible alloy linkage section of sectional area is higher than
The operating temperature of the big fusible alloy linkage section of sectional area.
10. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that the support arm and institute
It states fusible alloy connection section surface and is coated with fluxing disconnected agent.
11. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that including more parallel connections
Fusible component.
12. high voltage direct current thermal cut-off according to claim 11, which is characterized in that the more fusible components in parallel
The conduct piece of medium potential can integrate.
13. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that in the fusing chamber
The fusing chamber is divided into the inner cavity sealed against each other and exocoel by the middle nonmetallic diaphragm of setting, and the fluxing disconnected agent is accommodated in interior
It is intracavitary, the outer intracavitary setting quartz sand.
14. high voltage direct current thermal cut-off according to any one of claim 1-3, which is characterized in that the support arm and/or
Fusible alloy linkage section is tubular structure, is equipped with fluxing disconnected agent among pipe.
15. high voltage direct current thermal cut-off according to any one of claim 1-3, the support arm, fusible alloy linkage section
Connecting hole is equipped with the junction of conduct piece.
16. high voltage direct current thermal cut-off according to any one of claim 1-3, the external connection of the pin is close to institute
Stating fusing chamber side is waveform, is drawn in parallel far from the fusing chamber side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522884.0A CN109216128A (en) | 2017-06-30 | 2017-06-30 | A kind of high voltage direct current thermal cut-off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522884.0A CN109216128A (en) | 2017-06-30 | 2017-06-30 | A kind of high voltage direct current thermal cut-off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109216128A true CN109216128A (en) | 2019-01-15 |
Family
ID=64961210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710522884.0A Pending CN109216128A (en) | 2017-06-30 | 2017-06-30 | A kind of high voltage direct current thermal cut-off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109216128A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517282A (en) * | 2019-02-01 | 2020-08-11 | 华贸中经环保科技(天津)有限公司 | High-voltage safety device for ozone generator |
| WO2020186713A1 (en) * | 2019-03-20 | 2020-09-24 | 厦门赛尔特电子有限公司 | Thermal cutoff |
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| CN201149844Y (en) * | 2007-11-23 | 2008-11-12 | 西安西联电器有限责任公司 | Hollow structure fuse |
| CN203071028U (en) * | 2012-12-11 | 2013-07-17 | 好利来（中国）电子科技股份有限公司 | Fuse structure with high voltage level |
| CN103484720A (en) * | 2013-08-09 | 2014-01-01 | 厦门赛尔特电子有限公司 | Fusible alloy and temperature fuse applying same |
| CN203760407U (en) * | 2014-02-21 | 2014-08-06 | 厦门赛尔特电子有限公司 | Master control type temperature fuse device and temperature fuse device |
| CN203839326U (en) * | 2014-05-07 | 2014-09-17 | 厦门赛尔特电子有限公司 | High-voltage direct-current temperature fuse |
| US20150348732A1 (en) * | 2014-05-28 | 2015-12-03 | Cooper Technologies Company | Compact high voltage power fuse and methods of manufacture |
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2017
- 2017-06-30 CN CN201710522884.0A patent/CN109216128A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201149844Y (en) * | 2007-11-23 | 2008-11-12 | 西安西联电器有限责任公司 | Hollow structure fuse |
| CN203071028U (en) * | 2012-12-11 | 2013-07-17 | 好利来（中国）电子科技股份有限公司 | Fuse structure with high voltage level |
| CN103484720A (en) * | 2013-08-09 | 2014-01-01 | 厦门赛尔特电子有限公司 | Fusible alloy and temperature fuse applying same |
| CN203760407U (en) * | 2014-02-21 | 2014-08-06 | 厦门赛尔特电子有限公司 | Master control type temperature fuse device and temperature fuse device |
| CN203839326U (en) * | 2014-05-07 | 2014-09-17 | 厦门赛尔特电子有限公司 | High-voltage direct-current temperature fuse |
| US20150348732A1 (en) * | 2014-05-28 | 2015-12-03 | Cooper Technologies Company | Compact high voltage power fuse and methods of manufacture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517282A (en) * | 2019-02-01 | 2020-08-11 | 华贸中经环保科技(天津)有限公司 | High-voltage safety device for ozone generator |
| WO2020186713A1 (en) * | 2019-03-20 | 2020-09-24 | 厦门赛尔特电子有限公司 | Thermal cutoff |
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