CN205944469U - A terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor - Google Patents
A terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor Download PDFInfo
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- CN205944469U CN205944469U CN201620835981.6U CN201620835981U CN205944469U CN 205944469 U CN205944469 U CN 205944469U CN 201620835981 U CN201620835981 U CN 201620835981U CN 205944469 U CN205944469 U CN 205944469U
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- varistor
- diode
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- resistor
- piezo
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Abstract
The utility model discloses a terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor, including two at least terminal piece side by side, every terminal piece has and takes connecting portion converging of photovoltaic module, installs the diode between per two adjacent terminal piece, parallelly connected installation piezo -resistor on each diode. Clamping connection or welding installation are distinguished to two pins of piezo -resistor. The utility model discloses an every bypass diode last piezo -resistor that connects in parallel, protection bypass diode avoids the harm of transient state or surge, effectively prevents to lead to the fact cell to cross destructions such as nice and warm terminal box deformation when bypass diode from breaking down. Piezo -resistor adopts the clamping connection mode easily to dismantle the change.
Description
Technical field
This utility model be related to field of photovoltaic power generation and in particular to a kind of for photovoltaic junction box with multiple pressure-sensitive electricity
The terminal block of resistance.
Background technology
Cell panel, all of battery unit (generating element) is connected in series.As long as having one piece of battery unit because of certain
Plant fault not generate electricity, this battery unit can become resistance, the series circuit of battery unit is overall to be all difficult to pass through electric current, and impact is whole
Block cell panel, causes output significantly to reduce.In order to prevent this output from reducing, battery unit is divided by a lot of cell panels
For multigroup.Just in case having when being difficult to occur by the battery unit of electric current, just bypass the packet comprising this unit, remaining group
Unit may continue to power transmission.Bypass diode is just responsible for this roundabout function, thus make up this structure of solar panel lacking
Point.But bypass diode often shows resistive shorts feature once losing efficacy, and local temperature is spent more than 200 more, easily cause electrically
Fire.
Bypass diode has the advantages that low forward voltage drop, and less than the power dissipation of common P-N junction commutator.So
And, the shortcoming of this device be backward voltage breakdown characteristics relatively low it is easy to electric over-stress (EOS) because of ESD (static discharge)
With sensing high voltage and damage.
Static discharge：Photovoltaic cell is to be forced together with glass or transparent polycarbonate substrate with laminated film, or uses
Epoxide resin material sticks together.Glass, chemical material substrate and laminated film are all easy to produce ESD, and ESD intensity depends on electricity
The surface diameter of pond plate.ESD may damage bypass diode, mainly by way of overheating failure.Most bypass diodes
Maximum breakdown voltage only have 45V～60V, but its ESD that can tackle is relatively low.This ESD protection capability be also not enough to
Drive all of ESD situation, or the high voltage generating from power line and other source sensings.Cause to lose efficacy it by ESD and surge
Between difference be the quantity of ineffective part be different.In the failure of removal that great majority are caused by ESD, in rosette two
Some in the middle of individual or three devices can lose efficacy.And surge often can damage more bypass diodes.
Reaction energy and inductive energy：It is also likely to be to be caused by reaction energy and inductive energy that bypass diode lost efficacy.
Transient state and the surge of sensing when high power cable intersects or be parallel with the cable of solar battery panel, can be produced.With usual
Standard method be difficult to avoid.When rosette is disconnected with circuit, the energy being stored in cable can react in rosette
Bypass diode, at this moment will produce reaction energy.Energy grade depends on length and the supply voltage of cable.Most of sides
The snowslide capacity of road diode is less than 20mJ, is also not enough to deal with reaction energy.Short circuit can make all bypass diodes all lose
Effect.
Lightning surge：In mountain forest area with more lightning activities domain, photovoltaic plant is more subject to be struck by lightning because of its metal structure, logical in prior art
The SPD crossing in header box is protected.But because a SPD protects nearly 20 pieces of photovoltaic modulies, protect voltage higher and form protection
Blind area, the bypass diode being installed in rosette on photovoltaic module being is damaged by thunder and lightning easily.
Utility model content
In view of problem above, a kind of this utility model terminal for photovoltaic junction box with multiple varistors of offer
Block, can be used to protect bypass diode from the surface energy from lightning, high electric charge, and from high-voltage power-line etc. other
The faradic high power transient state in source and the infringement of surge.
The technical solution of the utility model is as follows：
A kind of terminal block for photovoltaic junction box with multiple varistors, including at least two terminals side by side
Piece, each terminal plate has the convergent belt connecting portion with photovoltaic module, is provided with diode between the adjacent terminal plate of each two,
Each diode has been installed in parallel varistor.
According to one side of the present utility model, one end of described terminal plate has convergent belt connecting portion, in convergent belt even
The both sides of socket part are equipped with varistor folder, and the other end of described terminal plate has wire interconnecting piece, the two of wire interconnecting piece
Side is equipped with diode folder, is separately installed with diode, in each two phase between the diode folder of the adjacent terminal plate of each two
It is separately installed with varistor between the varistor folder of adjacent terminal plate.
According to one side of the present utility model, described diode folder and varistor folder are cage construction.
According to one side of the present utility model, described varistor includes a varistor main body, varistor master
The obverse and reverse of body has two pins respectively, and two pins are clipped in respectively or are welded between varistor folder and terminal plate.
Advantageous Effects of the present utility model are：
This utility model is the infringement protecting bypass diode from transient state or surge, in each bypass diode parallel connection
One varistor.Varistor is the resistance device with nonlinear wind vibration, circuit can bear and carry out voltage during overvoltage
Clamper, absorbs unnecessary electric current to protect Sensitive Apparatuses.The resistor material of piezoresistor is quasiconductor.Using varistor
Nonlinear characteristic, when overvoltage occurs in two interpolars of varistor, varistor can by voltage clamp to relatively
Fixing magnitude of voltage, thus realize the protection to late-class circuit.Can effectively prevent bypass diode from when breaking down, causing electricity
Pool unit is overheated and rosette deformation etc. destroys.Varistor is also easily removable replacing using clamping connection mode.
Advantage of the present utility model will be given in the description of specific embodiment part below, partly will retouch from following
Become obvious in stating, or recognized by practice of the present utility model.
Brief description
Fig. 1 is parts explosion of the present utility model.
Fig. 2 is overall installation diagram of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described further.
Refer to Fig. 1, terminal block of the present utility model is by varistor folder 1, varistor 2, convergent belt folder 3, terminal plate
4th, diode 5 and diode folder 6 composition.Varistor folder 1, convergent belt folder 3, diode folder 6 are cage construction.
Refer to Fig. 2, terminal plate 4 has multiple, and they are arranged in parallel, and the structure of each terminal plate 4 is essentially identical, only
The structure being located at two terminal plates 4 of both sides may have a little difference.Each terminal plate 4 is divided into upper and lower ends.Terminal plate 4
Upper end is convergent belt connecting portion, and convergent belt connecting portion is equipped with convergent belt folder 3, and convergent belt folder 3 connects remittance by clamping connection mode
Stream band.Additionally, convergent belt also can be connected by welding manner.Varistor folder 1 is located at convergent belt and presss from both sides 3 both sides.Under terminal plate 4
End has wire interconnecting piece and diode folder 6, and wire interconnecting piece is located at wire interconnecting piece both sides in centre, diode folder 6.Every
It is clamped with a diode 5 between the diode folder 6 of two adjacent terminal plates 4.Pressure-sensitive in the adjacent terminal plate of each two 4
It is clamped with a varistor 2 respectively between resistance folder 1.Additionally, the also solderable installation of diode 5 and varistor 2.
Varistor 2 includes a varistor main body, and the obverse and reverse of varistor main body has two pins respectively,
Two pins are respectively inserted between varistor folder 1 and terminal plate 4 and are clamped by them.This clamp structure makes varistor 2
Easily disassembled, can varistor 2 aging or damage when be convenient for changing.This is a kind of embodiment.Additionally, varistor 2 also may be used
Welded and installed, but under this kind of scheme, varistor 2 is difficult to change.
Modal varistor is metal-oxide varistor (MOV, Metal Oxide Varistor), and it comprises
The ceramic block being made up of with other metal-oxides a small amount of or polymer spacer Zinc oxide particles, is sandwiched between two metal sheets.Granule
Diode effect can be formed with neighbouring oxide intersection, due to have in a large number mixed and disorderly granule so that it be equal to a lot of dorsad
Connected diode, only has the converse electrical leakage electric current of very little during low-voltage, when running into high voltage, diode is because of thermoelectron and tunnel
Channel effect and occur inversely to collapse, circulate high current.Therefore, the current-voltage characteristic curve of varistor has the non-of height
Linearly:During low-voltage, when resistance height, high voltage, resistance is low.Due to the difference of Main Ingredients and Appearance or brand, the pressure-sensitive electricity of metal-oxide
Resistance is sometimes it can also be seen that these titles:ZNR (Zinc-Oxide Non-linear Resistor, zinc oxide nonlinear electricity
Resistance), ZOV (Zinc-oxide Varistor), CNR (Composite Nonlinear Resistor [2]), TNR
(Titanium-oxide based Non-linear Resistor, titanium oxide nonlinear resistance, but be also likely to be
Toshiba Non-linear Resistor, nonlinear resistance of Toshiba etc..
Above-described is only preferred implementation of the present utility model, and this utility model is not limited to above example.Can
To understand, those skilled in the art directly derive on the premise of without departing from spirit of the present utility model and design or associate
Oher improvements and changes, are all considered as being included within protection domain of the present utility model.
Claims (4)
1. a kind of terminal block for photovoltaic junction box with multiple varistors it is characterised in that：Including at least two simultaneously
The terminal plate of row, each terminal plate has the convergent belt connecting portion with photovoltaic module, installs between the adjacent terminal plate of each two
There is diode, each diode has been installed in parallel varistor.
2. the terminal block for photovoltaic junction box with multiple varistors according to claim 1 it is characterised in that：
One end of described terminal plate has convergent belt connecting portion, is equipped with varistor folder, described end in the both sides of convergent belt connecting portion
The other end of sub-pieces has wire interconnecting piece, is equipped with diode folder in the both sides of wire interconnecting piece, at the adjacent end of each two
It is separately installed with diode between the diode folder of sub-pieces, be separately installed between the varistor folder of the adjacent terminal plate of each two
Varistor.
3. the terminal block for photovoltaic junction box with multiple varistors according to claim 2 it is characterised in that：
Described diode folder and varistor folder are cage construction.
4. the terminal block for photovoltaic junction box with multiple varistors according to claim 1 it is characterised in that：
Described varistor includes a varistor main body, and the obverse and reverse of varistor main body has two pins respectively, two
Pin is clipped in respectively or is welded between varistor folder and terminal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620835981.6U CN205944469U (en) | 2016-08-03 | 2016-08-03 | A terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620835981.6U CN205944469U (en) | 2016-08-03 | 2016-08-03 | A terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205944469U true CN205944469U (en) | 2017-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620835981.6U Active CN205944469U (en) | 2016-08-03 | 2016-08-03 | A terminal piece that is used for having of photovoltaic terminal box of a plurality of piezo -resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205944469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327022A (en) * | 2017-08-01 | 2019-02-12 | 费希尔-罗斯蒙特系统公司 | The method and apparatus of surge protection for dcs component |
-
2016
- 2016-08-03 CN CN201620835981.6U patent/CN205944469U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327022A (en) * | 2017-08-01 | 2019-02-12 | 费希尔-罗斯蒙特系统公司 | The method and apparatus of surge protection for dcs component |
| CN109327022B (en) * | 2017-08-01 | 2023-11-07 | 费希尔-罗斯蒙特系统公司 | Method and apparatus for surge protection of distributed control system components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230726 Address after: No. 2, Xiabao Road, Yueqing Bay Port District, Yueqing, Wenzhou City, Zhejiang Province 325600 Patentee after: Zhejiang Zhengtai Xinhui Photovoltaic Co.,Ltd. Address before: 325600 No. 192 Lane 22, Weisan Road, Yueqing Economic Development Zone, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG XINHUI PHOTOVOLTAIC TECHNOLOGY CO.,LTD. |