CN209389702U - Ceramic PTC therefore high pulse power load protector - Google Patents
Ceramic PTC therefore high pulse power load protector Download PDFInfo
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- CN209389702U CN209389702U CN201822033136.9U CN201822033136U CN209389702U CN 209389702 U CN209389702 U CN 209389702U CN 201822033136 U CN201822033136 U CN 201822033136U CN 209389702 U CN209389702 U CN 209389702U
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- ceramic ptc
- resistance
- pulse power
- high pulse
- power load
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Abstract
The utility model ceramic PTC therefore high pulse power load protector; by will at least 2 same specifications, identical parameters ceramic PTC thermistor veneer welding series connection form lamination resistance; lamination resistor coupled in parallel described at least two is formed into parallel resistance; or 2 parallel resistances are connected again, form ceramic PTC therefore high pulse power load protector.It can be combined into different proof voltages and the different ceramic PTC thermal resistors for passing through electric current, be used for load protection, can sufficiently meet big voltage and greatly by the requirement of electric current, service life has small in size up to ten thousand times or more.
Description
Technical field
The utility model relates to therefore high pulse power load protectors, especially for electric car (electric coach,
Electronic minibus) the therefore high pulse power load protector protected of high-power electric appliance electrical circuit.
Background technique
The high-tension high-power electrical equipment of electric car at present, there is a bulky capacitor on its power supply control plate, powered on moment,
Bulky capacitor both ends are equivalent to short-circuit condition, and at this moment upper electrical circuit is equivalent to short circuit, if upper electrical circuit is equipped with short-circuit protection and melts
Disconnected device, pulse surge current at this time can blow short-circuit protection fuse, and be powered in this way to bulky capacitor, upper electric pulse
Surge current easily causes bulky capacitor to damage, and the arteries and veins powered on can be controlled well by increasing load protector in upper electrical circuit
Surge current is rushed, the security reliability and service life of electrical circuit in raising.
Load protector on current electric car in electrical circuit is a kind of ceramic shell power wirewound resistor.Pottery
Ceramic shell power wire-wound resistor is to wind resistance wire in certain volume to obtain resistance, and volume is big, in use space finite volume
In the case where, it is limited by ceramic shell power line around resistor power, bigger power can not be obtained.And in use process
Middle ceramic shell power wirewound resistor cannot bear high-voltage large current for a long time, for example, direct current 750V, 10A or more it is long when
Between by electric current, will cause device body high temperature up to 500 DEG C or more, sharply temperature rise, ceramic shell crack rapidly inside resistance, make
It is easy to damage because of itself high temperature cabonization with middle ceramic shell power wirewound resistor, be far from being service life.
Utility model content
The utility model provides a kind of ceramic PTC therefore high pulse power load protector, especially powers on for electric car
Ceramic PTC therefore high pulse power load protector used in circuit prevents the pulse surge current powered on from short-circuit protection is fused
Device blows and protects coupled bulky capacitor, and can bear continuous therefore high pulse power load.
According to the basic principle of ceramic PTC thermistor and its exclusive characteristic, the R-T characteristic curve of ceramic PTC is shown in
Attached drawing 1；The current-time characteristic curve of ceramic PTC is shown in attached drawing 2；That is the initial resistance value of ceramic PTC thermistor is relatively low, initially
Can bear several seconds high currents, then due to ceramic PTC thermistor lead to high current fever make ceramic PTC thermistor into
Enter high configuration, the guard mode characteristic of low current.
The utility model ceramic PTC therefore high pulse power load protector, by will at least 2 same specifications, identical parameters ceramics
The welding series connection of PTC thermistor veneer forms lamination resistance A(to improve proof voltage), simultaneously by lamination resistance A described at least two
Connection forms parallel resistance B(and passes through electric current to expand), form ceramic PTC therefore high pulse power load protector.
Or the utility model ceramic PTC therefore high pulse power load protector, by will at least 2 same specifications, identical parameters make pottery
The welding series connection of porcelain PTC thermistor veneer forms lamination resistance A(to improve proof voltage), by lamination resistance A described at least two
Parallel connection forms parallel resistance B(and passes through electric current to expand), then parallel resistance B described in 2 is connected, form the high arteries and veins of ceramic PTC
Rush power termination protector.
Inside the shell by the encapsulation of above-mentioned PTC therefore high pulse power load protector, become product.
Described forms lamination resistance for 2 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, is
In pairing (welding) the surface metallization welding compound (silver paste) of 2 ceramic PTC thermistors, with (550 DEG C) sintering welderings of high temperature
It connects and is cascaded.
The utility model ceramic PTC therefore high pulse power load protector, 2 ceramic PTC thermistor face of weld coatings
Metal welding compound (silver paste) is carried out welding the lamination resistance to be formed that is cascaded with high temperature sintering, connects high temperature resistance
>=500 DEG C, fastness >=20N.The heat transfer of the lamination resistance formed after 2 ceramic PTC thermistor veneer welding is good, whole
Body heating temperature is consistent.Thus breach that international and domestic generally acknowledged " when using multiple PTC thermistors, asking should not the company of series connection
Connect " tradition final conclusion, because when ceramic PTC thermistor is connected in the form of traditional separation member, i.e., with conducting wire by 2 ceramic PTC heat
Quick resistance series connection, when passing through high voltage and high current, the partial pressure and fever for being embodied in a certain PTC thermistor on piece always have
Difference, this, which results in one of ceramic PTC thermistor, can first generate heat into high-impedance state, and another does not generate heat, to make
Inconsistent at 2 ceramic PTC thermistor heating temperatures, actually only one ceramic PTC thermistor works, in addition
Ceramic PTC thermistor not exclusively plays PTC thermistor, can only play conventional, electric-resistance use, and whole pressure resistance does not improve,
More than three pieces or three pieces connecting, situation is even more so, only one ceramic PTC thermistor works, other ceramic PTC heat
Quick resistance not exclusively plays PTC thermistor, can only play conventional, electric-resistance use；And welding is carried out with high temperature sintering and is connected on one
Rise formed lamination resistance heat transfer it is good, whole heating temperature is consistent, mutually conduction, simultaneously generate heat, simultaneously high resistant
It is considered as the big resistance an of entirety, pressure resistance improves.
The utility model ceramic PTC therefore high pulse power load protector is by least 2 same specifications, identical parameters ceramics
PTC thermistor piece is mutually cascaded through high temperature sintering welding as an entirety, effectively prevents one of ceramics
The partial pressure of PTC thermistor on piece and fever different problems, formed generate heat simultaneously, mutually conduction while high resistant, ensure that string
The stacked ceramic PTC thermistor heat transfer formed after connection is good, and whole heating temperature is consistent, forms the big electricity of lamination
Resistance, is equivalent to an entirety, is not simple series resistance.
And 2 big resistance of lamination for again obtaining aforesaid way are connected again, since 2 big resistance of lamination are with traditional separation member
Form series connection is not to weld series connection with veneer to be formed, can guarantee that the big resistance of lamination rises when through high voltage and high current
PTC thermistor effect, improves proof voltage.
The utility model is combined in a manner described according to selected same specification, identical parameters ceramic PTC thermistor,
Different proof voltages and the different ceramic PTC thermal resistors for passing through electric current can be combined into, load protection is used for, can sufficiently meet
Big voltage and pass through the requirement of electric current greatly.For therefore high pulse power load protector, especially powered on for electric car
Ceramic PTC therefore high pulse power load protector used in circuit prevents the pulse surge current powered on from short-circuit protection is fused
Device blows and protects the use demand of subsequent bulky capacitor, and meets RoHS environmental requirement, high impulse, powerful excellent spy
Property, embody the function of surge and reuse on tolerating high voltage, service life up to ten thousand times or more, and it is small in size especially
It is to be suitable for the high-power upper electrical circuit of electric car to protect therefore high pulse power load.
Detailed description of the invention
Fig. 1 is the R-T characteristic curve graph of ceramic PTC；
Fig. 2 is the current-time characteristic curve graph of ceramic PTC；
Fig. 3 is 1 structure principle chart of the utility model embodiment；
Fig. 4 is 2 structure principle chart of the utility model embodiment；
Fig. 5 is 3 structure principle chart of the utility model embodiment；
Fig. 6 is 4 structure principle chart of the utility model embodiment；
Fig. 7 is 5 structure principle chart of the utility model embodiment；
Fig. 8 is 6 structure principle chart of the utility model embodiment；
Fig. 9 is the waveform diagram of the utility model embodiment 5；
Figure 10 is the waveform diagram of the utility model embodiment 4；
Figure 11 is the waveform diagram of the utility model embodiment 6；
Figure 12 is the utility model embodiment product structure figure.
Specific embodiment
Embodiment 1
Referring to shown in attached drawing 3, the utility model ceramic PTC therefore high pulse power load protector, by 2 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A1, then lamination resistance A1 parallel connection described in 2 is formed
Parallel resistance B1.The ceramic PTC therefore high pulse power load protector that the embodiment obtains can theoretically be born individually with rule
Lattice, 2 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 2 times of electric current.
Embodiment 2
Referring to shown in attached drawing 4, the utility model ceramic PTC therefore high pulse power load protector, by 2 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A1, then lamination resistance A1 parallel connection described in 2 is formed
Parallel resistance B1, then 2 parallel resistance B1 are connected.The ceramic PTC therefore high pulse power load protection that the embodiment obtains
Device can theoretically bear independent same specification, 4 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 2 times of electric current.
Embodiment 3
Referring to shown in attached drawing 5, the utility model ceramic PTC therefore high pulse power load protector, by 2 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A1, then lamination resistance A1 parallel connection described in 3 is formed
Parallel resistance B2, then 2 parallel resistance B2 are connected.The ceramic PTC therefore high pulse power load protection that the embodiment obtains
Device can theoretically bear independent same specification, 4 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 3 times of electric current.
Embodiment 4
Referring to shown in attached drawing 6, the utility model ceramic PTC therefore high pulse power load protector, by 3 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A2, then lamination resistance A2 parallel connection described in 2 is formed
Parallel resistance B3, then 2 parallel resistance B3 are connected.The ceramic PTC therefore high pulse power load protection that the embodiment obtains
Device can theoretically bear independent same specification, 6 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 2 times of electric current.
Embodiment 5
Referring to shown in attached drawing 7, the utility model ceramic PTC therefore high pulse power load protector, by 3 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A2, then lamination resistance A2 parallel connection described in 3 is formed
Parallel resistance B4, then 2 parallel resistance B4 are connected.The ceramic PTC therefore high pulse power load protection that the embodiment obtains
Device can theoretically bear independent same specification, 6 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 3 times of electric current.
Embodiment 6
Referring to shown in attached drawing 8, the utility model ceramic PTC therefore high pulse power load protector, by 3 same specifications, identical
The welding series connection of parameter ceramic PTC thermistor veneer forms lamination resistance A2, then lamination resistance A2 parallel connection described in 4 is formed
Parallel resistance B5, then 2 parallel resistance B5 are connected.The ceramic PTC therefore high pulse power load protection that the embodiment obtains
Device can theoretically bear independent same specification, 6 times of (resistance to) voltage of identical parameters ceramic PTC thermistor and 4 times of electric current.
According to the requirement of electric control on electric car high-power electric appliance, i.e. application DC750V, 10A powers on electric current,
It is powered 1 second, powers off 10 seconds, load protector can continuous 5 recyclings requirement.
The utility model ceramic PTC therefore high pulse power load protector is monolithic same specification, identical using 5 structure of embodiment
The maximum pressure voltage of parameter ceramic PTC thermistor is DC500V, maximum current 10A, and obtained ceramic PTC therefore high pulse power is negative
Protector is carried, DC750V is being applied, 10A is powered under electric current, initial to be instantaneously resistant to up to 10kw or more, then due to PTC temperature-sensitive
The resistivity-temperature characteristics of resistance, its aftercurrent very little after ceramic PTC therefore high pulse power load protector energization action protection, entire function
Rate then only has 50w or so, and surface temperature only has 100 degree or so.The ceramic PTC therefore high pulse power obtained by the combination of embodiment 5
Load protector, shown in waveform attached drawing 9.
From fig. 9, it can be seen that being powered 1 second, powering off 10 seconds, power on for continuous 6 times, is applying DC750V, 10A powers on electric current,
The ceramic PTC therefore high pulse power load protector resistance value within the specified scope, meets the requirements, and electric current output reaches maximum requirement
Value 10A meets the requirements, and the power up requirement that electric current reduces, is not able to satisfy 10A is exported since the 7th power-up.Apply DC750V,
10A powers on electric current, is powered 1 second, powers off 10 seconds, and load protector can continuous 5 recyclings requirement.
If the ceramic PTC thermal resistor obtained using 4 mode of embodiment, applying DC750V, 10A powers on electric current,
It is powered 1 second, powers off 10 seconds, the ceramic PTC therefore high pulse power load protector resistance value meets the requirements after powering on for continuous 4 times, electricity
Stream output reaches maximum required value 10A and meets the requirements.Reduce, reach it can be seen from the figure that exporting electric current since the 5th power-up
Power up requirement less than 10A.Waveform diagram such as Figure 10.
If the ceramic PTC thermal resistor obtained using 6 mode of embodiment, applying DC750V, 10A powers on electric current,
It is powered 1 second, powers off 10 seconds, the ceramic PTC therefore high pulse power load protector resistance value conforms to after can powering on for continuous 7 times
It asks, electric current output reaches maximum required value 10A and meets the requirements, and electric current is exported since the 8th power-up and is just reduced, is not able to satisfy
The power up requirement of 10A, waveform diagram such as Figure 11.
It can find out through the above test result, the ceramic PTC thermal resistor that embodiment 5 and 6 mode of embodiment obtain all may be used
Meet electric car load protection to realize, i.e., application DC750V, 10A power on electric current, are powered 1 second, power off 10 seconds, load protection
Device can continuous 5 recyclings requirement, prevent the pulse surge current powered on from short-circuit protection fuse is blown and prevents from damaging
Subsequent bulky capacitor, and continuous therefore high pulse power can be born and do not damaged.
Considering that embodiment 5 is ideal from cost performance, applies DC750V, 10A powers on electric current, is powered 1 second, it powers off 10 seconds,
Meet continuous 5 times to power on, which meets the requirements；Its service life is able to satisfy
It is powered 1 second, powers off 10 seconds, the requirement of 10000 recyclings simultaneously should under conditions of applying DC750V for a long time and being powered 500 hours
Ceramic PTC therefore high pulse power load protector resistance value meets the requirements.Ceramic PTC therefore high pulse power load protector is as electronic
Automobile therefore high pulse power load protector has the advantages that small in size, tolerance power is big, is particularly suitable for the big function of electric car
The therefore high pulse power load protector that rate electrical appliance electrical circuit is protected.
Claims (5)
1. ceramic PTC therefore high pulse power load protector, it is characterized in that:
It, will at least 2 by least 2 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer are formed lamination resistance
A lamination resistor coupled in parallel forms parallel resistance, forms ceramic PTC therefore high pulse power load protector；
Described forms lamination resistance for 2 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, is at 2
The pairing surface metallization welding compound of ceramic PTC thermistor is cascaded with high temperature sintering welding；
Inside the shell by the encapsulation of above-mentioned PTC therefore high pulse power load protector.
2. ceramic PTC therefore high pulse power load protector, it is characterized in that:
It, will at least 2 by least 2 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer are formed lamination resistance
A lamination resistor coupled in parallel forms parallel resistance, then parallel resistance described in 2 is connected, and forms ceramic PTC high impulse
Power termination protector；
Described forms lamination resistance for 2 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, is at 2
The pairing surface metallization welding compound of ceramic PTC thermistor is cascaded with high temperature sintering welding；
Inside the shell by the encapsulation of above-mentioned PTC therefore high pulse power load protector.
3. ceramic PTC therefore high pulse power load protector, it is characterized in that:
Lamination resistance is formed by 3 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, then by least three institute
The lamination resistor coupled in parallel stated forms parallel resistance, then 2 parallel resistances are connected, and it is negative to form ceramic PTC therefore high pulse power
Carry protector:
Described forms lamination resistance for 3 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, is at 2
The pairing surface metallization welding compound of ceramic PTC thermistor is cascaded with high temperature sintering welding；
Inside the shell by the encapsulation of above-mentioned PTC therefore high pulse power load protector.
4. ceramic PTC therefore high pulse power load protector according to claim 3, it is characterized in that:
Lamination resistance is formed by 3 same specifications, the welding series connection of identical parameters ceramic PTC thermistor veneer, then will be described in 3
Lamination resistor coupled in parallel forms parallel resistance, then 2 parallel resistances are connected, and forms the load of ceramic PTC therefore high pulse power and protects
Protect device.
5. ceramic PTC therefore high pulse power load protector according to claim 3 or 4, it is characterized in that: monolithic same specification,
The maximum pressure voltage of identical parameters ceramic PTC thermistor is DC500V, maximum current 10A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822033136.9U CN209389702U (en) | 2018-12-05 | 2018-12-05 | Ceramic PTC therefore high pulse power load protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822033136.9U CN209389702U (en) | 2018-12-05 | 2018-12-05 | Ceramic PTC therefore high pulse power load protector |
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| Publication Number | Publication Date |
|---|---|
| CN209389702U true CN209389702U (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822033136.9U Expired - Fee Related CN209389702U (en) | 2018-12-05 | 2018-12-05 | Ceramic PTC therefore high pulse power load protector |
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| CN (1) | CN209389702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449901A (en) * | 2018-12-05 | 2019-03-08 | 丹东国通电子元件有限公司 | Ceramic PTC therefore high pulse power load protector |
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2018
- 2018-12-05 CN CN201822033136.9U patent/CN209389702U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449901A (en) * | 2018-12-05 | 2019-03-08 | 丹东国通电子元件有限公司 | Ceramic PTC therefore high pulse power load protector |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190913 Termination date: 20201205 |