CN212935573U - Photovoltaic energy storage all-in-one - Google Patents
Photovoltaic energy storage all-in-one Download PDFInfo
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- CN212935573U CN212935573U CN202020954454.3U CN202020954454U CN212935573U CN 212935573 U CN212935573 U CN 212935573U CN 202020954454 U CN202020954454 U CN 202020954454U CN 212935573 U CN212935573 U CN 212935573U
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- direct current
- photovoltaic
- energy storage
- energy
- management circuit
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- 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
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to a photovoltaic energy storage all-in-one, including energy management circuit, energy storage converter, battery management circuit, group battery, energy-conserving rack. The photovoltaic energy storage all-in-one machine charges the direct current electric energy generated by the photovoltaic module to the battery pack according to the control requirement, and outputs alternating current electric energy meeting the standard requirement to supply power to a load through the energy storage converter. The photovoltaic charging and load power supply system has the advantages that the photovoltaic charging and load power supply working mode is dynamically adjustable, the battery pack is subjected to fine management and other functions, the power supply safety and management efficiency can be improved, and a good foundation is laid for smart power grid construction.
Description
Technical Field
The utility model relates to a photovoltaic power generation power supply unit technical field especially relates to a photovoltaic energy storage all-in-one.
Background
With the development of green renewable energy applications, photovoltaic power generation has become the primary way to utilize solar energy. The photovoltaic power generation system has important significance and promotion effect on relieving energy and environmental problems.
At present, the traditional photovoltaic power supply equipment realizes the integration of energy sources such as photovoltaic energy and the like, but the traditional photovoltaic power supply equipment can only supply power through a self-contained generator (set) when the sunshine is insufficient. The traditional photovoltaic power supply equipment has the following problems: the generator has high power supply cost, high noise, environmental pollution and high transportation cost; the power supply system is difficult to adapt to reliable and stable power supply of various direct current and alternating current loads, is poor in power supply convenience, and cannot meet the power supply requirement of temporary networking construction; the reliability is poor, the power failure or the electric energy quality is poor, and related maintenance personnel cannot be informed in time, so that potential safety hazards are easily caused; the equipment is heavy and has poor controllability; the power supply system is easy to be damaged and difficult to maintain. Along with the informatization continues to advance, in order to guarantee power supply efficiency, quality to satisfy increasingly diversified load and power consumption demand, need a neotype photovoltaic power supply unit of a section, fundamentally solves the various problems that traditional photovoltaic power supply unit exists.
SUMMERY OF THE UTILITY MODEL
For solving prior art's not enough, the utility model provides a photovoltaic energy storage all-in-one charges the direct current electric energy that sends photovoltaic module to the group battery according to control needs to alternating current electric energy that satisfies the standard requirement through the energy storage converter output supplies power to the load. The photovoltaic power generation system can realize functions of direct current/alternating current energy conversion, integration, light weight, energy supervision, safety protection and the like, and can be widely applied to occasions such as off-grid photovoltaic power stations, distributed backup power sources and energy storage power stations.
In order to achieve the above object, the utility model discloses the technical scheme who adopts includes:
a photovoltaic energy storage integrated machine is characterized by comprising an energy management circuit, an energy storage converter, a battery management circuit and a battery pack;
the energy management circuit is respectively in communication connection with the energy storage converter and the battery management circuit through an RS485/Modbus RTU;
the energy storage converter is in communication connection with the battery management circuit by adopting a CAN2.0B protocol;
the battery management circuit is connected with the battery pack circuit;
the energy storage converter comprises a photovoltaic connecting end connected with a photovoltaic direct current input, a battery connecting end connected with the battery pack, two groups of direct current lightning protectors, a direct current EMC filter, an LC filter circuit and a direct current/direct current converter, wherein the two groups of direct current lightning protectors, the direct current EMC filter and the LC filter circuit are respectively connected with the photovoltaic connecting end and the battery connecting end, the direct current/direct current converter outputs fixed voltage, the energy storage converter also comprises a three-phase inverter bridge, an alternating current reactance, a filter capacitor, a three-phase transformer, an alternating current contactor, an alternating current EMC filter, an alternating current breaker and an alternating current lightning protector, and is finally; the negative electrode of the photovoltaic direct current input is directly connected with the negative electrode of the battery pack through the direct current lightning protector and the direct current EMC filter; and the positive electrode of the photovoltaic direct current input and the positive electrode of the battery pack are indirectly connected through the direct current lightning protector, the direct current EMC filter and the LC filter circuit respectively through the direct current/direct current converters which are respectively connected.
Further, the photovoltaic energy storage all-in-one machine is arranged in an energy-saving cabinet, the energy-saving cabinet is made of a vacuum heat insulation material coated with galvanized plates on the inner side and the outer side, and polyurethane foam is preferably filled in a gap between each galvanized plate and the vacuum heat insulation material.
Further, the vacuum heat insulation material comprises vacuum-pumping glass wool fibers wrapped by the aluminum thin composite film.
Further, the energy-saving cabinet is also provided with a heat pipe air conditioner.
Furthermore, the heat pipe air conditioner comprises an in-cabinet unit, an out-cabinet unit and a circulating pump which are sequentially connected by refrigerant pipelines to form a closed refrigerant loop.
Further, the in-cabinet unit and the out-cabinet unit respectively comprise a heat transfer pipe, a fin heat exchanger arranged outside the heat transfer pipe and a fan for blowing the fin heat exchanger.
Further, the vertical installation position of the outside cabinet unit is higher than that of the inside cabinet unit.
Further, the energy management circuit is in communication connection with the upper control device through an RS485/Modbus RTU, and/or the energy management circuit is in communication connection with the upper control device through a wired or wireless network.
The utility model has the advantages that:
by adopting the photovoltaic energy storage integrated machine, the automatic switching of the constant-current and constant-voltage segmented charging and discharging can be realized by integrating the photovoltaic energy storage integrated machine, the automatic switching of the constant-power and constant-voltage segmented charging and discharging can be realized, and the system operation safety is maintained; meanwhile, the battery management circuit can be used for realizing the abnormal detection, protection and alarm of the single battery pack and the battery pack string. The system has the advantages of achieving the functions and characteristics of dynamic adjustability of multiple working modes, fine management of the battery pack, convenience and quickness in networking and the like, and has great practical significance for improving the energy structure, improving the performance of a power generation system and developing the photovoltaic power generation industry.
Drawings
Fig. 1 is the utility model discloses photovoltaic energy storage all-in-one communication connection schematic diagram.
Fig. 2 is a schematic diagram of the energy storage converter circuit of the present invention.
Fig. 3 is the schematic diagram of the energy-saving cabinet of the present invention.
FIG. 4 is a schematic view of the vacuum insulation material of the present invention.
Fig. 5 is a schematic view of the working flow of the heat pipe air conditioner of the present invention.
Figure 6 is utility model photovoltaic energy storage all-in-one connects external equipment schematic diagram.
Description of the figure numbering: 1-an energy-saving cabinet, 2-a vacuum heat insulation material, 3-a heat pipe air conditioner, 4-a battery pack, 5-an aluminum thin composite film, 6-glass cotton fiber, 7-a refrigerant pipeline, 8-an in-cabinet unit, 9-an out-cabinet unit, 10-a heat transfer pipe, 11-a fin heat exchanger, 12-a fan, 13-a photovoltaic energy storage integrated machine and 14-a supervision platform.
Detailed Description
For a clearer understanding of the present invention, reference will be made to the following detailed description of the embodiments with reference to the accompanying drawings.
The utility model discloses photovoltaic energy storage all-in-one communication connection schematic diagram, including energy management circuit, energy storage converter, battery management circuit, group battery 4 as shown in figure 1. The energy management circuit preferably adopts a model with an output electric signal modulation management function; the energy storage converter can preferably adopt an ANPCS-30KT model; the battery management circuit and the battery pack can preferably select a lithium battery pack and a lithium battery management circuit which are matched with each other. The energy management circuit is respectively in communication connection with the energy storage converter and the battery management circuit through an RS485/Modbus RTU; the energy storage converter is in communication connection with the battery management circuit by adopting a CAN2.0B protocol; the battery management circuit is in circuit connection with the battery pack. The energy management circuit is in communication connection with the upper-layer control equipment through an RS485/Modbus RTU, and/or the energy management circuit is in communication connection with the upper-layer control equipment through a wired or wireless network. The communication system can control the charging and discharging strategy according to the battery pack 4, the state information of the energy storage converter and the environmental control information, and can also receive related charging and discharging control instructions from remote or upper-layer control equipment. The battery management circuit can monitor the voltage and the temperature of the single battery cell and the total voltage of a single tray, transmit the information to the secondary battery management circuit in real time through a CAN2.0B protocol or other bus communication modes, and control the rotating speed of the fan 12 and the voltage balance of the single battery cell; further, the battery management circuit can detect the total voltage and the total current of the whole battery pack 4, display the capacity and the health state of the battery pack 4 during charging and discharging, predict the power and calculate the internal resistance, control the balance of the voltages of the relay switch and the disc level unit, ensure the safe, reliable and stable operation of the battery pack 4, and display and report alarm information when the battery pack 4 operates and has the states of overvoltage, undervoltage, overcurrent, high temperature, low temperature, electric leakage, communication abnormity, battery management system abnormity and the like. Meanwhile, the battery management circuit also preferably has a self-diagnosis function, and can perform self-diagnosis on faults such as communication interruption between the battery management circuit and the outside, internal communication abnormality of the battery management circuit, analog quantity acquisition abnormality and the like, and report the faults to a monitoring system platform; the battery management circuit can modify various operating parameters in the battery management circuit or the energy storage station monitoring system in a local mode and a remote mode, and can add passwords to perform the authority authentication function. The battery management circuit can locally display various running states of the battery system, such as system states, analog quantity information, alarm and protection information and the like, through an LED display screen, and can locally store various events and historical data of the battery pack 4.
As shown in fig. 2, the utility model discloses energy storage converter circuit diagram, including photovoltaic link, the connection of connecting photovoltaic direct current input the battery link of group battery and connect respectively the photovoltaic link with two sets of direct current lightning protection devices, direct current EMC wave filter, LC filter circuit and the direct current/direct current converter of output fixed voltage of battery link still including connecting three-phase inverter bridge, alternating current reactance, filter capacitance, three-phase transformer, ac contactor, alternating current EMC wave filter, ac circuit breaker and the alternating current lightning protection device of direct current/direct current converter output. The direct current generated by the photovoltaic confluence input and the battery pack is converted into three high-frequency chopping voltages through a three-phase bridge converter, and the high-frequency chopping voltages are filtered by a filter to be converted into sine waves to be output and finally connected with an alternating current load. The negative electrode of the photovoltaic direct current input is directly connected with the negative electrode of the battery pack through the direct current lightning protector and the direct current EMC filter; the positive pole of the photovoltaic direct current input and the positive pole of the battery pack 4 are respectively indirectly connected through a direct current lightning protection device, a direct current EMC filter and an LC filter circuit and then through direct current/direct current converters which are respectively connected, and direct current electric energy generated by the photovoltaic component is charged to the battery pack 4 or directly converted into alternating current to supply power to a load according to control requirements.
Fig. 3 is a schematic view of the energy-saving cabinet 1 of the present invention. Comprises a vacuum heat-insulating material 2, a heat pipe air conditioner 3 and a battery pack 4, wherein the two sides of the vacuum heat-insulating material are coated with galvanized plates. The energy-saving cabinet 1 is made of vacuum heat insulation materials 2 coated with galvanized plates on the inner side and the outer side, and polyurethane foam is filled in gaps between the galvanized plates and the vacuum heat insulation materials 2. The vacuum heat insulating material 2 is preferably vacuum-pumping glass wool fibers 6 wrapped with an aluminum thin composite film 5 as shown in fig. 4. By adopting the vacuum heat insulation material 2, the heat exchange between the battery pack 4 and the environment can be avoided to the maximum extent, the temperature of the battery pack 4 is further controlled, and the battery pack 4 is ensured not to be influenced by the environment and to run normally. The energy-saving cabinet 1 is also provided with a heat pipe air conditioner 3 as shown in fig. 5, and the heat pipe air conditioner 3 comprises an in-cabinet unit 8, an out-cabinet unit 9 and a circulating pump which are sequentially connected by a refrigerant pipeline 7 to form a closed refrigerant loop. The in-cabinet unit 8 and the out-cabinet unit 9 each include a heat transfer pipe 10, a fin heat exchanger 11 disposed outside the heat transfer pipe 10, and a fan 12 that blows the fin heat exchanger 11. When the fin heat exchanger 11 works, the working time of the circulating pump can be reduced, so that the working life of the circulating pump is prolonged. Considering the energy efficiency, the fan 12 generally operates only when the outside temperature is lower than the inside temperature by more than 4 ℃ (i.e., when the outside temperature is lower than the inside temperature by 4 ℃, it is more cost-effective to use forced ventilation heat exchange, and conversely, when the inside-outside temperature is lower than 4 ℃, the forced heat exchange is not cost-effective). When the temperature difference between the inside and the outside of the cabinet reaches 10 ℃, the energy efficiency ratio can reach more than 10 and is far higher than the energy efficiency ratio of compressor refrigeration, and the larger the temperature difference is, the higher the energy efficiency ratio is.
The vertical installation position of the outside cabinet unit 9 in the heat pipe air conditioner 3 is preferably higher than that of the inside cabinet unit 8. When the temperature outside the cabinet is lower than the temperature inside the cabinet, the refrigerant condenses into liquid inside the heat transfer tubes 10 of the outside unit 9 and naturally flows downward, and then naturally flows downward to the lower portion of the inside unit 8 through the refrigerant pipeline 7 and enters the inside unit 8. Meanwhile, the refrigerant liquid in the heat transfer pipe 10 of the in-cabinet unit 8 absorbs the heat in the air in the cabinet, turns into gas, naturally flows upwards to the upper part of the out-cabinet unit 9 along the heat transfer pipe 10 of the in-cabinet unit 8 and the refrigerant pipeline 7, enters the heat transfer pipe 10 of the out-cabinet unit 9, and is condensed into liquid to flow downwards again. The refrigerant is circulated continuously in this way, and the heat in the air in the cabinet is transferred to the air outside the cabinet, so that the temperature in the cabinet is reduced. Compared with a natural cooling mode of directly introducing fresh air outside the cabinet, the indoor unit 8 and the outdoor unit 9 cannot cause air pollution inside the cabinet, and cleanliness inside the cabinet is guaranteed. Meanwhile, due to the fact that air inside and outside the cabinet is not exchanged, humidity inside the cabinet is kept, and frequent maintenance of the filter can be avoided. The in-cabinet unit 8 and the out-cabinet unit 9 preferably have complete automatic control and protection functions, and can efficiently control the coordinated operation of all the components of the unit through advanced control logic, so that the energy consumption of the unit is reduced as much as possible. The machine set 8 in the cabinet and the machine set 9 outside the cabinet are made of embossed aluminum plates, so that the weight is reduced, the corrosion resistance is good, and the machine set 9 outside the cabinet cannot generate light reflection (light pollution).
As shown in 6 be the utility model discloses external equipment schematic diagram is connected to photovoltaic energy storage all-in-one, including photovoltaic energy storage all-in-one 13 and supervision platform 14, photovoltaic energy storage all-in-one 13 adopts Modbus RTU directly to link with supervision platform 14, or adopts wired/wireless network communication to connect. The photovoltaic energy storage integrated machine 13 can perform control operation of a charging and discharging strategy according to the battery pack 4, the state information of the energy storage converter and the environmental control information, and can also receive related charging and discharging control instructions from the supervision platform 14.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A photovoltaic energy storage integrated machine is characterized by comprising an energy management circuit, an energy storage converter, a battery management circuit and a battery pack;
the energy management circuit is respectively in communication connection with the energy storage converter and the battery management circuit through an RS485/Modbus RTU;
the energy storage converter is in communication connection with the battery management circuit by adopting a CAN2.0B protocol;
the battery management circuit is connected with the battery pack circuit;
the energy storage converter comprises a photovoltaic connecting end connected with a photovoltaic direct current input, a battery connecting end connected with the battery pack, two groups of direct current lightning protectors, a direct current EMC filter, an LC filter circuit and a direct current/direct current converter, wherein the two groups of direct current lightning protectors, the direct current EMC filter and the LC filter circuit are respectively connected with the photovoltaic connecting end and the battery connecting end, the direct current/direct current converter outputs fixed voltage, the energy storage converter also comprises a three-phase inverter bridge, an alternating current reactance, a filter capacitor, a three-phase transformer, an alternating current contactor, an alternating current EMC filter, an alternating current breaker and an alternating current lightning protector, and is finally; the negative electrode of the photovoltaic direct current input is directly connected with the negative electrode of the battery pack through the direct current lightning protector and the direct current EMC filter; and the positive electrode of the photovoltaic direct current input and the positive electrode of the battery pack are indirectly connected through the direct current lightning protector, the direct current EMC filter and the LC filter circuit respectively through the direct current/direct current converters which are respectively connected.
2. The all-in-one photovoltaic energy storage machine as claimed in claim 1, wherein the all-in-one photovoltaic energy storage machine is arranged in an energy-saving cabinet, and the energy-saving cabinet is made of vacuum heat insulation materials with galvanized plates coated on the inner side and the outer side.
3. The integrated photovoltaic and energy storage machine as claimed in claim 2, wherein the vacuum insulation material comprises vacuum-pumping glass wool fibers wrapped by an aluminum thin composite film.
4. The integrated photovoltaic and energy storage machine as claimed in claim 2 or 3, wherein the energy-saving cabinet is further provided with a heat pipe air conditioner.
5. The photovoltaic energy storage integrated machine according to claim 4, wherein the heat pipe air conditioner comprises an in-cabinet unit, an out-cabinet unit and a circulating pump which are sequentially connected by refrigerant pipelines to form a closed refrigerant loop.
6. The integrated photovoltaic and energy storage machine of claim 5, wherein the in-cabinet unit and the out-cabinet unit each comprise a heat transfer tube, a finned heat exchanger disposed outside the heat transfer tube, and a fan for purging the finned heat exchanger.
7. The integrated photovoltaic and energy storage machine as claimed in claim 6, wherein the vertical installation position of the out-cabinet unit is higher than that of the in-cabinet unit.
8. The photovoltaic energy storage integrated machine of claim 1, wherein the energy management circuit is in communication connection with the upper control device through an RS485/Modbus RTU, and/or the energy management circuit is in communication connection with the upper control device through a wired or wireless network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020954454.3U CN212935573U (en) | 2020-05-30 | 2020-05-30 | Photovoltaic energy storage all-in-one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020954454.3U CN212935573U (en) | 2020-05-30 | 2020-05-30 | Photovoltaic energy storage all-in-one |
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| Publication Number | Publication Date |
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| CN212935573U true CN212935573U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020954454.3U Active CN212935573U (en) | 2020-05-30 | 2020-05-30 | Photovoltaic energy storage all-in-one |
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| CN (1) | CN212935573U (en) |
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- 2020-05-30 CN CN202020954454.3U patent/CN212935573U/en active Active
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