CN206506491U - Solar power generation component chip seal pressure formula terminal box - Google Patents

Abstract

Solar power generation component chip seal pressure formula terminal box.The exploitation manufacture of terminal box is combined together with semiconductor packaging there is provided a kind of, the solar power generation component chip seal pressure formula terminal box of product automation degree is lifted.Including box body, N number of chip, N number of connection sheet and N+1 copper conductor, N >=1, box body is provided with least one storage tank, and box body is provided with a horizontal bar；N number of copper conductor is provided with chip placing position, and N+1 copper conductor is provided with positioned at the extraction position of the horizontal bar top surface；Chip is fixedly welded on the placement position of the copper conductor；N+1 copper conductor is connected in series by the chip, connection sheet；Placement position, chip and the connection sheet of the copper conductor are poured fixation by casting glue and are encapsulated in the storage tank.The utility model makes terminal box product structure compacter, material using more reasonable, product development speed faster, be more easy to realize automated production, with more the market competitiveness.

Description

Solar power generation component chip seal pressure formula terminal box

Technical field

The utility model is related to solar power generation component terminal box, more particularly to a kind of solar power generation component chip Seal pressure formula terminal box.

Background technology

Solar power generation component is mounted in the important component in solar power generation component with terminal box, and it is component that it, which has, Middle cell piece provides bypass protection effect and the effect that can outwards transmit that component generates electricity.Solar power system is exactly to pass through Terminal box output cable and patched in component by some pieces of electrification components, carry out series and parallel connection and realizes electricity generation, and lead to Electric power storage or inversion are crossed, electric power or grid-connected power supply are provided to electric consumer.

Terminal box is for the principle that cell piece provides bypass protection：Solar power generation component in solar power plant system exists Generated electricity under the normal illumination of sunlight, outwards export electric energy.But when some position in irradiation electrification component sunlight by object or Person's shadow of object is blocked, and the silicon cell at the position is transformed into resistance states by generating state, series connection with it is other Electrification component normal power generation under sunlight irradiation, electric current produces larger consumption heating, makes electricity by the cell piece of resistance states Pond piece and component backboard burn, and this phenomenon is referred to as the hot spot phenomenon of component.To prevent the generation of hot spot phenomenon, using in the sun In often string silicon cell group in energy electrification component, one bypass diode of reverse parallel connection, when hot spots condition occurs, diode Forward conduction, electric current is outwards exported by bypass diode, protects silicon cell not to be burned out the safe work with electrification component Make.

Bypass diode is designed to be arranged in terminal box, is generally fitted with three bypasses two in conventional terminal box at present / 3rd cell pieces in pole pipe, respectively solar power generation component provide bypass protection.Therefore solar power generation component is used Terminal box has bypass protection and electric energy output function simultaneously.

For many years, terminal box have passed through multiple improvement and development.

The terminal box of prior art manufacture, typically by monomer diode package device, terminal box body（Box body, lid）、 Internal copper conductive radiating fins（Copper conductor）, output cable and connector composition.Diode is assembled or used paster by clamping Formula diode is assembled on the copper conductive radiating fins of junction box by reflow soldering；The copper conduction for assembling diode dissipates Backing is installed in terminal box body by plastics rivet hot again.Therefore terminal box production mounting process step is various, manpower consumption It is larger.

The producing and selling of terminal box have higher access door, are performed at present according to IEC-61215 standards, prior art The terminal box of production is solving the problems such as sealing property, temperature rise model and internal gas expand, and has certain difficulty.

Numerous photovoltaic module products encapsulated with many diode chip for backlight unit are occurred in that on Vehicles Collected from Market.

Its scheme is that three diode chip for backlight unit are integrated in an injection molding body, can simplify terminal box manufacturer welding assembly two The processing step of pole pipe.But in terms of structure and application requirement, module is still fixed on junction box with the method installed, too After terminal box is installed in electrification component by Yang Neng components manufacturer, thorax in box body is stilled need to irrigate fluid sealant, product is in production With in application without clear superiority.

Because photovoltaic module is influenceed by structure and technique, its larger packaging body volume and different materials at work, Acted on by temperature change, material expand is produced stress to chip, certain influence can be there is to product service life.

Photovoltaic bypass diode (led) module fixes clamping with terminal box body by plastic pallet, makes limited junction box Heat-dissipating space can not be effectively utilized, so as to limit operating current handling capacity.Needed in terminal box production application More complicated production equipment, could carry out Automated assembly.

Photovoltaic module product can have following defect in actual production and application：

1st, most of photovoltaic module products are using the ultrasonic wave aluminium wire bonding technology shown in Figure 35, and wave welding head of ultrasonic wave 10 is by aluminium Silk is connected on diode chip for backlight unit and on the conductor of photovoltaic module.This mode has at 2 points, one, photovoltaic diode adopts Schottky processing chip is used, the diode PN junction of the technique is located at below the surface aluminum metal layer of chip, supersonic bonding stress It can act on diode chip for backlight unit, its pressure and amplitude of vibration are slightly larger, i.e., easily PN junction is come to harm, influence product service life, It is less than normal, easily there is false connection.Accordingly, it would be desirable to which using the expensive process equipment of very volume, technological requirement could be met and steady It is qualitative；2nd, due to being below the metal materials such as copper, silver as welding material, its electric conductivity and thermal conductivity using aluminium wire, light is caused The pressure drop for lying prostrate module product is higher, and operationally, photovoltaic module product caloric value is higher, and power consumption is higher, weak heat-dissipating.

2nd, using the technique of high-pressure injection, as shown in figure 36, thermoset resin material was wrapped up to the chip week being welded Enclose.This injection technique is in injection moulding process, and plastics are in the presence of injecting head, with high effluxvelocity and pressure, injection Into cavity body of mould, it can act directly on diode chip for backlight unit and connection aluminium strip, cause chip by from from resin material Compression, and aluminium strip tension.Due to the stress concentration in injection moulding process, cause inside modules structural deformation, reduce The unfailing performance of module.

3rd, existing photovoltaic module product by three diode chip for backlight unit generally using copper conductor side is distributed in, with thermosetting tree Fat material is by the side seal.When photovoltaic module locally produces hot spot effect, wherein one or two chip, which is started working, to be produced Heat, due to the thermal conductivity of exterior packaging material and copper copper conductor, the temperature of euthermic chip, which can be passed rapidly, to be replaced onto neighbouring chip, is made Its temperature rises.And now photovoltaic module does not occur the part of hot spot effect also in normal power generation, its generating voltage acting in opposition In on corresponding diode chip for backlight unit.Based on the hot properties of Schottky diode chip, now reverse leakage current increase, due to leakage Electric current will not saturation, the junction temperature of chip PN junction can be caused further to raise so that reverse leakage current increases again, now shape Into diode chip for backlight unit heating vicious circle, equalization point is exceeded when serious, diode chip for backlight unit can be breakdown, photovoltaic module product loses Effect.

4th, the diode chip for backlight unit of existing photovoltaic module product is concentrated together, and using thermosetting resin parcel.In work shape Under state diode chip for backlight unit produce heat can not fast spread, be restricted the operating current of terminal box.

5th, there is the process of secondary operation to semiconductor devices in the terminal box of prior art production：Monomer encapsulates diode Need to be connected with copper conductor by crimping or reflow soldering；Photovoltaic module is needed by press-fiting and the plastics in terminal box body Tray fixing clip connects；The high temperature of Reflow Soldering causes different expansions to different materials, can influence the internal stress and compactness of device；Pressure Connecing can be such that device is influenceed by external pressure, and photovoltaic module plastic body easily occurs and bursts apart and be broken, and the quality brought that is pressurized Hidden danger；

6th, photovoltaic module needs higher development cost, and single with terminal box model corresponding relation, it is impossible to adapt to wiring The exploitation and development of box, installation between the two coordinate requirement higher, and the exploitation for adding both sides coordinates difficulty.

Utility model content

The utility model solves photovoltaic module stress greatly for problem above there is provided one kind, and local temperature is high, and radiating is not Uniformly, the problem of junction box heat-dissipating space utilization rate is low, product development input is larger.By the exploitation manufacture and half of terminal box Conductor encapsulation technology combines together, and effectively lifting properties of product reduce product cost and development cost simultaneously, and lifting product is automatic The solar power generation component of change degree chip seal pressure formula terminal box.

The technical solution of the utility model is：Including box body, N number of chip, N number of connection sheet and N+1 copper conductor, N >=1,

The box body is provided with least one storage tank, and the box body is higher than the storage tank groove provided with an apical side height The horizontal bar at bottom；

N number of copper conductor is corresponded with N number of chip in N+1 copper conductor, and N number of copper conductor is provided with chip placing position, N+1 Individual copper conductor is provided with positioned at the extraction position of the horizontal bar top surface；

The chip is fixedly welded on the placement position of the copper conductor and adjacent copper conductor is connected to by connection sheet Connection position on；

N+1 copper conductor is connected in series by the chip, connection sheet, forms the bypass circuit with output end；

Placement position, chip and the connection sheet of the copper conductor are poured fixation by casting glue and are encapsulated in the storage tank, institute The position of drawing for stating copper conductor is located on the horizontal bar, higher than the top surface of the casting glue.

Technique connection strap is provided between adjacent copper conductor.

As N ＞ 1, technique connection ring is set between at least two copper conductors.

As N ＞ 1, the connection position of connection output end is additionally provided with first and last copper conductor.

As N ＞ 2, the chip sets up separately in the both sides of the horizontal bar.

Convergent belt perforating holes are provided with the horizontal bar, the convergent belt perforating holes are by the back side of the box body through described Horizontal bar；The lower mouth of the convergent belt perforating holes is big, suitable for reading small；

The position of drawing of the copper conductor is provided with the corresponding threading hole of convergent belt perforating holes.

The box portion of terminal box is designed with one or more opened upper end storage glue grooves by the utility model（Hold Put groove）Plastic body；According to the requirement of the various models of terminal box and radiating Spreading requirements, the number of storage tank is set.Provided with two Individual or two or more storage tank box body, its storage tank is set to set on horizontal bar, horizontal bar between two rows distribution, two row's storage tanks Provided with convergent belt perforating holes, the extraction position of copper conductor is provided with threading hole, is easy to place convergent belt according to Client application, such Distributed architecture mode can disperse the thermal source generated heat during diode operation, make full use of the limited radiating of junction box empty Between, reduce influence each other.

Copper conductor in the utility model is provided with chip placing position and located at the extraction position of horizontal bar top surface so that will weld The local copper conductor of diode chip for backlight unit is carried, sinking processing is carried out by bending, chip and part copper conductor is embedded into In corresponding storage tank.Poured again with high heat conduction, high mechanical properties epoxide-resin glue to storage tank, after solidification, diode core Piece has obtained sealing protection, and copper conductor is also fixed on terminal box body, forms terminal box；

The utility model is poured using high heat conduction, high mechanical properties epoxide-resin glue by low pressure, static temperature solidification, real The high-strength structure that protection, copper conductor and box body are now packaged to diode chip for backlight unit is fixed, and high pressure is avoided in production process The mechanical shock that injected plastics material jet is produced to chip, and high-pressure injection moulding jet of material deform copper conductor, and produce to core Piece pulls power；

Copper conductor in the utility model is not only that terminal box provides circuit path, it is often more important that carried for diode chip for backlight unit For radiating condition, the bending of copper conductor carries out sinking processing, adds its developed area, be diode chip for backlight unit work there is provided More fully radiating condition；

Meanwhile, after the epoxy resin cure that the heat-conducting mediums such as alumina powder, silicon powder are filled with storage tank, from plane side Fully contacted to facade direction with copper conductor, the operating temperature of quick reduction chip improves 30% electric current handling capacity, more Plus the efficient properties of product for improving terminal box.

N+1 copper conductor is connected in series by chip, connection sheet, in order to eliminate in manufacturing process, relative between copper conductor It is mobile, pull stress to what chip was caused.The utility model devises technique company in punching copper conductor between each copper conductor Ring or technique connection strap are connect, multiple copper conductors is temporarily forming an entirety.After chip welding and embedding solidification is completed, with brill Cut or punching mode, remove technique connection ring or technique connection strap.

The utility model spans monomer encapsulation diode terminal box, the encapsulation manufacturing process of photovoltaic module terminal box, saves The actions such as secondary welding, secondary assembling are omited.By the encapsulation technology conjunction manufactured and designed with semiconductor diode of terminal box Two be one, it is to avoid secondary welding and installs the hidden danger of quality brought to terminal box product；Substantially increase the exploitation of terminal box Speed；Eliminate mutual break-in and adjustment process of the terminal box manufacturer with semiconductor diode package manufacturer；Make terminal box Product structure is compacter, material using more reasonable, product development speed faster, be more easy to realize automated production, product system Cause this lower, with more the market competitiveness.

Brief description of the drawings

Fig. 1 is the structural representation of the first embodiment of the utility model,

Fig. 2 is the structural representation of box body in Fig. 1,

Fig. 3 is the sectional view in A-A faces in Fig. 2,

Fig. 4 is the structural representation of copper conductor framework in Fig. 1,

Fig. 5 is that Fig. 4 is left view,

Fig. 6 is the attachment structure schematic diagram of copper conductor framework and chip in Fig. 1,

Fig. 7 is the attachment structure schematic diagram of copper conductor and chip in Fig. 1,

Fig. 8 is Fig. 7 top view,

Fig. 9 is the structural representation of embedding in box body in the utility model,

Figure 10 is the structural representation of the optimal enforcement mode in the utility model,

Figure 11 is the structural representation one of box body exit in Fig. 1,

Figure 12 is the structural representation two of box body exit in Fig. 1,

Figure 13 is the structural representation of second of embodiment of the utility model,

Figure 14 is the structural representation of box body in Figure 13,

Figure 15 is the sectional view in B-B faces in Figure 14,

Figure 16 is the structural representation of copper conductor framework in Figure 13,

Figure 17 is Figure 16 left view,

Figure 18 is the attachment structure schematic diagram of copper conductor and chip in Figure 13,

Figure 19 is the structural representation of the third embodiment of the utility model,

Figure 20 is the structural representation of box body in Figure 19,

Figure 21 is the sectional view in C-C faces in Figure 20,

Figure 22 is the structural representation of copper conductor framework in Figure 19,

Figure 23 is Figure 22 left view,

Figure 24 is the structural representation one of box body exit in Figure 19,

Figure 25 is the structural representation two of box body exit in Figure 19,

Figure 26 is the attachment structure schematic diagram of copper conductor framework and chip in Figure 19,

Figure 27 is the structural representation of the 4th kind of embodiment of the utility model,

Figure 28 is the structural representation of box body in Figure 27,

Figure 29 is the sectional view in D-D faces in Figure 28,

Figure 30 is the structural representation of copper conductor framework in Figure 27,

Figure 31 is Figure 30 left view,

Figure 32 is the structural representation one of box body exit in Figure 27,

Figure 33 is the structural representation two of box body exit in Figure 27,

Figure 34 is the attachment structure schematic diagram of copper conductor framework and chip in Figure 27,

Figure 35 is the structural representation of ultrasonic wave aluminium wire bonding in the prior art,

Figure 36 is the structural representation of high-pressure injection processes in the prior art；

1 is box body in figure, and 11 be storage tank, and 12 be horizontal bar, and 120 be convergent belt perforating holes, and 13 be locating dowel, and 14 be taper Blind hole, 2 be chip, and 3 be connection sheet, and 4 be copper conductor, and 41 be placement position, and 42 be to draw position, and 420 be threading hole, and 43 be connection Position, 5 be casting glue, and 6 be technique connection strap, and 7 be technique connection ring, and 8 be fin, and 9 be copper conductor framework, and 10 be supersonic welding Head.

Embodiment

The utility model is as shown in Fig. 1-34, including box body 1, N number of chip 2, N number of connection sheet 3 and N+1 copper conductor 4, N >=1, N round numbers, the box body are provided with least one storage tank 11, and the box body holds provided with an apical side height higher than described Put the horizontal bar 12 of groove bottom land；

The shape of storage tank can be designed as square, oval and polygon-shaped according to product requirement；

Storage tank being distributed as in terminal box：Terminal box containing a storage tank, storage tank is distributed in terminal box Side；Terminal box containing two or more storage tanks, storage tank is distributed in terminal box both sides or surrounding；The purpose is to most The scattered pyrotoxin of limits, utilize limited terminal box heat-dissipating space；

N number of copper conductor is corresponded with N number of chip in N+1 copper conductor 4, and N number of copper conductor is provided with chip placing position 41, N+1 copper conductor is provided with positioned at the extraction position 42 of the horizontal bar top surface；So that the copper conductor is not contour with least two Face；

So, the diode chip for backlight unit and copper conductor sinking position being welded with diode chip for backlight unit copper conductor are embedded into box body and housed In groove, poured by high heat conduction, high mechanical properties epoxide-resin glue, seal and be fixed in box body；

It can be embedded in each storage tank and seal, fix a chips or multiple chips；It can be embedded in and seal, two copper are led The sinking position of body or the sinking position of multiple copper conductors；Copper conductor containing multiple sinking positions, its sinking position respectively by It is embedded into storage tank different in terminal box.

Sunk type copper conductor is formed by red copper, brass or alloyed copper by being punched bending.Under low level plane after bending is Heavy position, each copper conductor contains one or more sinking positions；Sinking position is distributed in the side or a few sides or centre of copper conductor Position.

As shown in Figure 19,27, in only one of which chip, two copper conductors, wherein, a copper conductor is pacified provided with chip Extraction position is equipped with set, two copper conductors；

As shown in Fig. 1,13, when there is three chips, four copper conductors, wherein, three copper conductors are provided with chip placing Position, four copper conductors, which are provided with, draws position；

The chip is fixedly welded on the placement position of the copper conductor and adjacent copper conductor is connected to by connection sheet Connection position 43 on；

N+1 copper conductor is connected in series by the chip, connection sheet, forms the bypass circuit with output end；Wiring The N faces of diode chip for backlight unit are welded on copper conductor in box, and the P of diode chip for backlight unit is bridged by being welded to connect piece with side copper conductor Connection, realizes concatenation connection, and is exported using copper conductor as node, welds convergent belt for client and connection output cable is used.

As N=1, a node is formed；Or as N ＞ 1, form N+1 node；

The placement position of the copper conductor, chip, the connection position of connection sheet and adjacent copper conductor pour solid by casting glue 5 Surely it is encapsulated in the storage tank, the position of drawing of the copper conductor is located on the horizontal bar, higher than the top surface of the casting glue.

Technique connection strap 6 is provided between adjacent copper conductor, multiple copper conductors is temporarily forming an entirety, in order to eliminate system During making, relatively moved between copper conductor, stress is pullled to what chip was caused.

As N ＞ 1, technique connection ring 7 is set between at least two copper conductors, make multiple copper conductors be temporarily forming one it is whole Body, in order to eliminate in manufacturing process, relatively moves between copper conductor, stress is pullled to what chip was caused.

As N ＞ 1, the connection position of connection output end is additionally provided with first and last copper conductor.Such as Figure 19,27 institutes Show, as N=1, connection position of the copper conductor provided with connection output end；In only one of which chip, it is necessary to several chipsets Conjunction is used.

Provided with gap and being electrically connected by chip and connection sheet between adjacent copper conductor, as N ＞ 1, first with Connection output end is additionally provided with last copper conductor（That is exit）Connection position, i.e., first copper conductor have positive pole cable Exit, last copper conductor has negative pole cable exit, and positive pole cable exit and negative pole cable exit are respectively provided with In the outside of box body；

As shown in Figure 11,12, positive pole cable connection exit and negative pole cable connect the setting of exit, and its direction is vertical Directly in box body；

Positive pole cable connects exit and negative pole cable connects the setting of exit, and its direction is parallel to box body；

Positive pole cable connects exit and negative pole cable connects the setting of exit, and its direction is any angle with box body；

As N ＞ 2, the chip sets up separately in the both sides of the horizontal bar.Such distributed architecture mode can make diode The thermal source generated heat during work disperses, and makes full use of the heat-dissipating space that junction box is limited, reduces influence each other.

Convergent belt perforating holes 120 are provided with the horizontal bar 12, the convergent belt perforating holes are passed through by the back side of the box body Wear the horizontal bar；The lower mouth of the convergent belt perforating holes is big, suitable for reading small, plays guide effect, is easy to convergent belt to place；

The position 42 of drawing of the copper conductor is provided with the corresponding threading hole 420 of convergent belt perforating holes.

The upper strata ladder plane of sunk type copper conductor（Draw position）Provided with the threading hole for client's erecting and welding convergent belt And welded disc；Copper conductor containing a sinking position, it is set for the threading hole and welded disc of client's erecting and welding convergent belt In the side of copper conductor；Copper conductor containing two or more sinking positions, it wears for client's erecting and welding convergent belt String holes and welded disc are arranged on copper conductor middle part.

The solar power generation component processing method of chip seal pressure formula terminal box, comprises the following steps：

1）, copper conductor processing, by copper sheet punching molding, formed adjacent copper conductor be connected as a single entity by technique attachment structure, And there is the copper conductor framework 9 in gap each other；

Technique connection ring or technique connection strap are provided between each copper conductor, each copper conductor is temporarily connected as entirety, complete Into after chip welding, pouring, solidification, technique connection ring or technique connection strap are removed；

2）, chip connection, chip is welded on copper conductor by connection sheet, is formed and is led with the copper of bypass circuit structure Body framework；

3）, embedding, the copper conductor framework described in upper step is placed in box body, toward pouring epoxy resin in storage tank Glue, chip and connection sheet are encapsulated within epoxide-resin glue, solidification；

4）, cut-out, Cutting process attachment structure, be made.

As shown in figures 1 to 6, step 1) in technique attachment structure be technique connection strap, the technique connection strap be located at horizontal bar On, technique connection strap is connected between the extraction position of adjacent conductor,

Step 4）In, the technique connection strap between adjacent copper conductor is cut off by bicker.

The utility model slot milling on box body horizontal bar, to facilitate in terminal box in storage tank after epoxy resin cure, The punching for carrying out technique connection strap is removed.

As shown in figures 13-18, step 1) in technique attachment structure be technique connection ring；

Step 3）In, locating dowel 13 is provided with the storage tank of the box body, the locating dowel is located in technique connection ring, institute The bottom surface for stating box body is provided with the tapered blind hole 14 consistent with locating dowel center line；

Step 4）In, by drilling, through tapered blind hole, remove the technique connection ring between adjacent copper conductor.

The utility model is provided with the locating dowel being engaged with copper conductor technique connection ring in box body storage tank, and in box Body back side position corresponding with locating dowel sets tapered blind hole, play the guiding role, and technique is removed exactly by drilling to facilitate Connection ring.

Also include fin 8, the fin is encapsulated within epoxide-resin glue, plays a part of radiating, fin can For copper sheet, aluminium flake etc..

Claims (6)

1. solar power generation component chip seal pressure formula terminal box, including box body, N number of chip, N number of connection sheet and N+1 Copper conductor, N >=1, it is characterised in that

The box body is provided with least one storage tank, and the box body is provided with an apical side height higher than the storage tank bottom land Horizontal bar；

N number of copper conductor is corresponded with N number of chip in N+1 copper conductor, and N number of copper conductor is provided with chip placing position, N+1 copper Conductor is provided with positioned at the extraction position of the horizontal bar top surface；

The chip is fixedly welded on the placement position of the copper conductor and the company of adjacent copper conductor is connected to by connection sheet Connect on position；

N+1 copper conductor is connected in series by the chip, connection sheet, forms the bypass circuit with output end；

Placement position, chip and the connection sheet of the copper conductor are poured fixation by casting glue and are encapsulated in the storage tank, the copper The position of drawing of conductor is located on the horizontal bar, higher than the top surface of the casting glue.

2. solar power generation component according to claim 1 chip seal pressure formula terminal box, it is characterised in that adjacent Technique connection strap is provided between copper conductor.

3. solar power generation component according to claim 1 chip seal pressure formula terminal box, it is characterised in that work as N During ＞ 1, technique connection ring is set between at least two copper conductors.

4. solar power generation component according to claim 1 chip seal pressure formula terminal box, it is characterised in that work as N During ＞ 1, the connection position of connection output end is additionally provided with first and last copper conductor.

5. solar power generation component according to claim 1 chip seal pressure formula terminal box, it is characterised in that work as N During ＞ 2, the chip sets up separately in the both sides of the horizontal bar.

6. solar power generation component according to claim 1 chip seal pressure formula terminal box, it is characterised in that in institute Horizontal bar is stated provided with convergent belt perforating holes, the convergent belt perforating holes run through the horizontal bar by the back side of the box body；It is described to converge Flow the lower mouth with perforating holes big, suitable for reading small；

The position of drawing of the copper conductor is provided with the corresponding threading hole of convergent belt perforating holes.