CN214506994U - Photovoltaic junction box - Google Patents
Photovoltaic junction box Download PDFInfo
- Publication number
- CN214506994U CN214506994U CN202120916833.8U CN202120916833U CN214506994U CN 214506994 U CN214506994 U CN 214506994U CN 202120916833 U CN202120916833 U CN 202120916833U CN 214506994 U CN214506994 U CN 214506994U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- photovoltaic
- integrated circuit
- field effect
- circuit
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a photovoltaic terminal box belongs to power equipment technical field. Photovoltaic terminal box, including box body, lid, integrated circuit board, metal current-carrying spare and diode, box body and lid link together through ultrasonic welding mode, vacuole formation between box body and the lid, the installation of box body bottom integrated circuit board, two photovoltaic cables are connected to integrated circuit board through the mode of intermediate frequency welding, the last installation of integrated circuit board metal current-carrying spare is adjacent connect through the diode between the metal current-carrying spare, last voltage acquisition circuit and the maximum power point tracking circuit of setting up of integrated circuit board, voltage acquisition circuit's output is connected maximum power point tracking circuit's input. The utility model provides a current photovoltaic terminal box can not coordinate the electric energy distribution each other, cause the technical problem of photovoltaic module output power loss.
Description
Technical Field
The utility model relates to a power equipment technical field, concretely relates to photovoltaic terminal box.
Background
Photovoltaic junction boxes are common accessories in the photovoltaic industry, and are mainly used for transmitting electric energy converted from light energy to a power circuit. The existing photovoltaic junction box usually adopts a diode mode, the situation that a fault cell burns out due to rapid heating caused by higher forward bias voltage is avoided, however, when a certain photovoltaic module starts the diode for isolation protection, the photovoltaic module can be mismatched with other photovoltaic modules connected in series, and the overall power generation efficiency of a photovoltaic system is influenced. Therefore, there is a need for further improvements in the devices.
The utility model discloses a photovoltaic terminal box in No. CN203722572U discloses in the bulletin, including the box body, is equipped with the electric conductor in this box body, and this electric conductor rear portion is equipped with the busbar, and the middle part is equipped with the diode, and the front end is connected with the cable conductor, electric conductor rear portion is fixed with the downward convex spring card in middle part, and the middle part of this spring card is pressed on this busbar. After optimization, the box body is provided with a positioning column, and the conductor is provided with a positioning hole matched with the positioning column; the lead of the diode is connected with the conductor in a resistance welding mode; the cable is connected with the conductor in a resistance welding mode; the end part of the cable is fixed on the box body through a pressing block, and the pressing block is fixed on the box body in an ultrasonic welding mode; sealant is filled in the box body. Because the utility model discloses a series connection photovoltaic module's working form, according to the wooden bucket effect principle as the impaired work that can influence other photovoltaic module of a photovoltaic module, and cause power loss.
Disclosure of Invention
In view of this, the utility model aims to solve the technical problem that a photovoltaic terminal box is provided, allots photovoltaic module voltage rationally, adopts the maximum power point tracking algorithm, increases photovoltaic module's output efficiency effectively.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a photovoltaic junction box, includes box body, lid, integrated circuit board, metal current-carrying piece and diode, box body and lid link together through the ultrasonic bonding mode, vacuole formation between box body and the lid, the installation of box body bottom integrated circuit board, two photovoltaic cables are connected to integrated circuit board through the mode of intermediate frequency welding, the installation on the integrated circuit board metal current-carrying piece is adjacent connect through the diode between the metal current-carrying piece, last voltage acquisition circuit and the maximum power point tracking circuit of setting of integrated circuit board, voltage acquisition circuit's output is connected maximum power point tracking circuit's input.
The number of the metal current-carrying pieces is 4, the metal current-carrying pieces are arranged on the integrated circuit board in a straight line shape, the number of the diodes is 3, and the adjacent metal current-carrying pieces are connected through the diodes.
The center distance between two adjacent diodes is larger than 2 cm.
And one side surface of the box body is provided with two cable through holes.
In the voltage acquisition circuit, a voltage dividing resistor R10 and a photovoltaic module R11 are respectively arranged at two ends of an input voltage VIN, and after the voltage dividing resistor R10 is connected with the photovoltaic module R11 in series, a capacitor C1 is connected in parallel at two ends of the photovoltaic module R11.
The maximum power point tracking circuit comprises a field effectTube Q1And field effect transistor Q2And field effect transistor Q3And field effect transistor Q4An inductance coil L and a capacitor C, and an effect tube Q1And field effect transistor Q2And field effect transistor Q3And field effect transistor Q4The inductance coil L and the capacitor C are combined into a series-parallel circuit, wherein a field effect tube Q2A first series circuit connected with the capacitor C in series and connected with the field effect transistor Q4The first parallel circuit is connected in parallel to form a first parallel circuit, the first parallel circuit is connected with the inductance coil L in series to form a second series circuit, and the second series circuit is connected with the field effect transistor Q3Are connected in parallel to form a second parallel circuit, and the second parallel circuit is connected with the field effect transistor Q1Connected in series to form a third series circuit.
The utility model has the advantages that: the box body and the box cover of the utility model are made of polyphenyl ether engineering plastic, the waterproof sealing effect is good, and the electric shock prevention and insulation protection effects are achieved; the box body and the box cover are connected in an ultrasonic welding mode, so that the connecting contact area is increased, the contact resistance is reduced, and the use is safer; the diode is connected between the metal current-carrying pieces, so that the one-way conduction function of the circuit is realized, and the hot spot effect among all photovoltaic modules can be avoided; the center distance between the adjacent diodes is larger than 2cm, so that the heat generated by the diodes can be quickly released, and the spontaneous explosion is avoided; the integrated circuit board is used as a substrate, so that the integral structure of the junction box is simplified, and the functions of the junction box are improved; the maximum power monitoring system consisting of the voltage acquisition circuit and the maximum power point tracking circuit is adopted, so that the ordered allocation of electric quantity is realized, and the anti-interference capability of the device is improved; the utility model discloses simple structure, excellent performance is fit for extensively promoting.
Drawings
Fig. 1 is the structure schematic diagram of the photovoltaic junction box of the present invention.
Fig. 2 is a schematic diagram of the integrated circuit board circuit of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
The reference numerals in fig. 1 denote:
1. a box cover; 2. a diode; 3. a metal current-carrying member; 4. a box body; 5. a photovoltaic cable; 6. a negative connector; 7. and a positive connector.
The first embodiment is as follows:
the photovoltaic junction box shown in fig. 1 comprises a box body 4, a box cover 1, an integrated circuit board, a metal current-carrying piece 3 and a diode 2, wherein the box body 4 and the box cover 1 are made of polyphenyl ether engineering plastics, and the materials have the characteristics of high rigidity, strong heat resistance, high strength and small node loss.
Four metal current-carrying pieces 3 and three diodes 2 are installed on the integrated circuit board, the four metal current-carrying pieces 3 are fixed on the integrated circuit board in a straight line shape, and the adjacent metal current-carrying pieces 3 are connected through the diodes 2. The anode and the cathode of a single diode 2 are respectively connected with two adjacent metal current-carrying pieces 3, the anode or the cathode of one diode 2 is adjacent to the cathode or the anode of the other diode 2, and after connection, the three diodes 2 are connected in series. The center distance between two adjacent diodes 2 is larger than 2cm, and heat release of each diode 2 is facilitated.
Example two:
the technical scheme described in the embodiment is an improvement on the basis of the first embodiment: the integrated circuit board is provided with a voltage acquisition circuit and a maximum power point tracking circuit, the voltage acquisition circuit is used for acquiring the working voltage of the photovoltaic module, as shown in fig. 2, two ends of an input voltage VIN are respectively provided with a voltage dividing resistor R10 and a photovoltaic module R11, and after the two are connected in series, two ends of the photovoltaic module R11 are connected with a capacitor C1 in parallel. And two ends of the capacitor C1 are provided with acquisition ports AD, and the capacitor C1 plays a role in filtering and reducing interference.
The maximum power point tracking circuit is connected with the voltage acquisition circuit according to the voltage acquisition circuit, receives the voltage signal acquired by the voltage acquisition circuit and feeds back and adjusts the voltage of the photovoltaic module R11. As shown in fig. 2, the maximum power point tracking circuit includes a field effect transistor Q1、Q2、Q3、Q4(ii) a Inductor L, capacitor C, and effect tube Q1、Q2、Q3、Q4The inductance coil L and the capacitance C are combined into a series-parallel circuit, wherein Q1、Q4Is a master control tube, Q2、Q3For synchronous rectifiers, field-effect transistors Q2A first series circuit connected with the capacitor C in series and connected with the field effect transistor Q4The first parallel circuit is connected in parallel to form a first parallel circuit, the first parallel circuit is connected with the inductance coil L in series to form a second series circuit, and the second series circuit is connected with the field effect transistor Q3Are connected in parallel to form a second parallel circuit, and the second parallel circuit is connected with the field effect transistor Q1Connected in series to form a third series circuit. Wherein, the inductance coil L plays the role of isolating alternating current signals, the capacitor C plays the roles of filtering and reducing interference, and when the maximum power point tracking circuit works in a voltage reduction mode, Q2Always on, Q4Always off, regulating Q1The corresponding step-down voltage can be obtained by the turn-on time of the voltage; when operating in boost mode, Q1Always on, Q3Always off, regulating Q4The boost voltage can be obtained by the turn-on time of the voltage booster; when Q is1、Q2Is always on, and Q3、Q4When the switch is always turned off, the input voltage is not adjusted.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The utility model provides a photovoltaic terminal box, includes box body, lid, integrated circuit board, metal current-carrying spare and diode, its characterized in that: the utility model discloses a photovoltaic power generation device, including integrated circuit board, metal current-carrying piece, integrated circuit board, voltage acquisition circuit and maximum power point tracking circuit, box body and lid link together through ultrasonic bonding mode, vacuole formation between box body and the lid, the installation of box body bottom integrated circuit board, two photovoltaic cables are connected to integrated circuit board through the mode of intermediate frequency welding, the last installation of integrated circuit board metal current-carrying piece is adjacent connect through the diode between the metal current-carrying piece, set up voltage acquisition circuit and maximum power point tracking circuit on the integrated circuit board, voltage acquisition circuit's output is connected maximum power point tracking circuit's input.
2. The photovoltaic junction box of claim 1, wherein: the number of the metal current-carrying pieces is 4, the metal current-carrying pieces are arranged on the integrated circuit board in a straight line shape, the number of the diodes is 3, and the adjacent metal current-carrying pieces are connected through the diodes.
3. The photovoltaic junction box of claim 2, wherein: the center distance between two adjacent diodes is larger than 2 cm.
4. The photovoltaic junction box of claim 3, wherein: and one side surface of the box body is provided with two cable through holes.
5. The photovoltaic junction box of claim 1, wherein: in the voltage acquisition circuit, a voltage dividing resistor R10 and a photovoltaic module R11 are respectively arranged at two ends of an input voltage VIN, and after the voltage dividing resistor R10 is connected with the photovoltaic module R11 in series, capacitors C1 are connected in parallel at two ends of the photovoltaic module R11.
6. The photovoltaic junction box of claim 1, wherein: the maximum power point tracking circuit comprises a field effect transistor Q1And field effect transistor Q2And field effect transistor Q3And field effect transistor Q4An inductance coil L and a capacitor C; the effect tube Q1And field effect transistor Q2And field effect transistor Q3And field effect transistor Q4The inductance coil L and the capacitor C are combined into a series-parallel circuit, wherein the field effect transistor Q2A first series circuit connected with the capacitor C in series and connected with the field effect transistor Q4The first parallel circuit is connected in parallel to form a first parallel circuit, the first parallel circuit is connected with the inductance coil L in series to form a second series circuit, and the second series circuit is connected with the field effect transistor Q3Are connected in parallel to form a second parallel circuit, and the second parallel circuit is connected with the field effect transistor Q1Connected in series to form a third series circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120916833.8U CN214506994U (en) | 2021-04-29 | 2021-04-29 | Photovoltaic junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120916833.8U CN214506994U (en) | 2021-04-29 | 2021-04-29 | Photovoltaic junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214506994U true CN214506994U (en) | 2021-10-26 |
Family
ID=78204487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120916833.8U Active CN214506994U (en) | 2021-04-29 | 2021-04-29 | Photovoltaic junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214506994U (en) |
-
2021
- 2021-04-29 CN CN202120916833.8U patent/CN214506994U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203377785U (en) | Charging and discharging type DC-DC conversion circuit and new energy power generation system | |
| CN102904454B (en) | Efficient insulation DC (direct-current) converter system in photovoltaic power generation system | |
| CN107070215B (en) | Three-level boost common-ground system and control method thereof | |
| CN103227577A (en) | Power converting apparatus and photovoltaic module | |
| KR102615960B1 (en) | Power converting device and and photovoltaic module including the same | |
| CN213043596U (en) | Staggered parallel flyback miniature photovoltaic inverter | |
| CN103475211A (en) | Coupling inductor and voltage doubling circuit combined set-up converter | |
| CN109327136B (en) | Three-level boosting type direct current conversion topology based on coupling winding unit | |
| CN110504833A (en) | A kind of high-gain boost converter based on active electric network | |
| CN214506994U (en) | Photovoltaic junction box | |
| CN201051718Y (en) | Power unit module with energy feedback device | |
| CN111697682A (en) | String type high-power MPPT solar charging controller | |
| CN201608672U (en) | Maximum power point tracking controller based on Boost circuit | |
| CN212210848U (en) | Boost conversion circuit based on control chip | |
| KR102289420B1 (en) | Pv inverter including connector | |
| CN204333978U (en) | A kind of single-phase miniature photovoltaic combining inverter | |
| CN202905750U (en) | Solar junction box with output control function | |
| CN208226555U (en) | Photovoltaic module array cutoff device | |
| CN206226031U (en) | A kind of solar energy system including full-bridge inverter | |
| CN212676941U (en) | String type high-power MPPT solar charging controller | |
| CN112350573A (en) | Boost-improved Boost gain Cuk converter single-switch DC-DC circuit | |
| CN109995128A (en) | Photovoltaic high-frequency isolation charging circuit and high pressure photovoltaic off-grid power supply system | |
| CN205986763U (en) | Lug and use its photovoltaic assembly junction box | |
| CN214756236U (en) | Integrated photovoltaic bypass element module and junction box with same | |
| CN217984553U (en) | Multi-point direct current access circuit of energy storage inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |