CN110190810B - Method for measuring power loss of pollution-caused photovoltaic power supply and application configuration correction method - Google Patents
Method for measuring power loss of pollution-caused photovoltaic power supply and application configuration correction method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
Abstract
The invention discloses a method for measuring power loss of a photovoltaic power supply caused by dirt, which comprises the following steps: step 1, constructing a pollution experiment scene covering the surface of a photovoltaic cell panel; step 2, performing surface contamination on the photovoltaic cell panel; step 3, measuring the output power and the dust covering density of the photovoltaic cell panel; and 4, calculating the output power breakage rate of the photovoltaic cell panel caused by dirt. The invention also discloses a correction method of the application configuration of the photovoltaic device in the polluted area, which takes the output power breakage rate tau caused by different dust covering densities on the output power as the representation quantity of the dust covering, wherein the value of the tau is determined according to the local climate and the building environment, and takes a larger value for arid, windy and sandy and heavy industrial areas and a smaller value for humid areas with rich vegetation climate. The method of the invention is simple and easy to implement, and has high accuracy.
Description
Technical Field
The invention belongs to the technical field of solar power generation monitoring and photovoltaic cell panel operation maintenance, relates to a method for measuring power loss of a photovoltaic power supply caused by dirt, and further relates to a method for correcting application configuration of a photovoltaic device in a dirt area.
Background
In the face of shortage of fossil fuels and serious pollution of ecological environment, various countries strive to change energy consumption structures and vigorously develop renewable energy sources. Among them, solar photovoltaic power generation is increasingly emphasized due to its technical advantages. Solar energy resources are abundant in China, the illumination conditions in most areas are good, and the development prospect of the photovoltaic industry is good. According to different power supply objects, the photovoltaic power generation system can be divided into a grid-connected photovoltaic system for supplying power to a power grid and a large-area load and an independent photovoltaic system for supplying power to street lamps, monitoring devices and the like.
Most independent photovoltaic systems are inconvenient to operate and maintain outdoors, the surfaces of the photovoltaic systems cannot be kept clean due to the influence of the environment after long-term work, the generated energy of the photovoltaic cell panels depends on the amount of solar radiation which can be received by the photovoltaic cell panels through the surface glass panels, and the collected dust reduces the received solar radiation and damages the output power. Under the normal use condition, the service life of the photovoltaic cell panel is about 10 to 20 years, and the designed floating charge service life of the lead-acid storage battery is 5 to 8 years. However, according to field installation condition feedback, the photovoltaic power system configured according to the industry experience formula cannot reach the expected service life after being installed, the problems of aging acceleration, insufficient power supply, power failure and the like often occur within two years or even in a shorter time, the continuous data acquisition and monitoring requirements of the device cannot be met, and the replacement cost after failure is high and is very inconvenient.
Therefore, it is necessary to measure the power loss of the photovoltaic power supply caused by pollution and correspondingly improve the empirical photovoltaic application configuration method according to the on-site pollution and ash covering conditions.
Disclosure of Invention
The invention aims to provide a method for measuring power loss of a photovoltaic power supply caused by pollution, which is used for quantitatively describing the power loss caused by the pollution by considering the diversity of the environment under the condition of normalizing the pollution influence factors on the surface of a battery plate.
The invention also aims to provide a method for correcting the application configuration of the photovoltaic device in the polluted area.
The invention adopts the technical scheme that a method for measuring power loss of a pollution-caused photovoltaic power supply is implemented according to the following steps:
step 3, measuring the output power and the dust covering density of the photovoltaic cell panel,
and 4, calculating the output power breakage rate of the photovoltaic cell panel caused by dirt.
The invention adopts another technical scheme that a correction method of the application configuration of the photovoltaic device in the polluted area takes the output power breakage rate tau caused by different dust covering densities to the output power as the representation quantity of the dust covering, the output power P of the pollution covering photovoltaic cell panel, the effective sunshine duration of the installation place is t, and the conversion efficiency of the solar cell panel is ηpvCoefficient of safety capacity KcAs shown in formula (4):
the value of tau is determined according to local climate and building environment, and is relatively large for drought, sand blown by wind and heavy industrial areas, and relatively small for humid areas with rich vegetation climate.
The beneficial effects of the invention are that the invention comprises the following aspects:
1) sand blown by the wind, haze and the like can cause the concentration of particulate matters in the air to rise, and the light scattering is aggravated to a certain extent. In addition, dust and dirt corrode parts in a humid environment, the service life of the assembly is shortened, the uneven temperature distribution on the surface of the assembly can be caused by long-term dirt dust covering, even a hot spot effect is generated, and the photovoltaic assembly is damaged. Therefore, the research on the accumulation rule and the influence mechanism of the pollutants on the surface of the photovoltaic cell panel has important significance for the long-term application of the pollutants on the outdoor site.
2) The influence of dust is taken into consideration in a power supply configuration formula, and the reduction of incident radiation caused by light transmittance loss caused by the dust is considered to be reflected on the equivalent sunshine duration, so that the attenuation coefficient is converted into the sunshine duration to ensure a more appropriate configuration specification.
Drawings
FIG. 1 is a graph showing a contamination experiment platform coated on the surface of a photovoltaic cell panel;
FIG. 2 is a graph of output power loss versus soot density.
In the figure, 1, a precision electronic scale, 2, a xenon lamp power supply, 3, a power supply starting button, 4, a pulse triggering button, 5, a xenon lamp, 6, a light source chamber adjusting knob, 7, a light path reverser, 8, a photovoltaic cell panel, 9, a cell panel placing table and 10, an experiment table are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a method for measuring power loss of a photovoltaic power supply caused by dirt and an application configuration correction method, which are used for measuring, evaluating and correcting the influence of dirt and dust coverage on the surface of an outdoor photovoltaic cell panel on power output.
As shown in fig. 1, the method of the present invention is a photovoltaic cell panel surface contamination-covered experimental platform, the experimental platform includes a precision electronic scale 1 and a xenon lamp 5 placed on an experimental table 10, the xenon lamp 5 is provided with a light source chamber adjusting knob 6, the xenon lamp 5 is connected with a light path reverser 7, a light output port of the light path reverser 7 corresponds to a photovoltaic cell panel 8 below, the xenon lamp 5 is placed at the edge of the experimental table 10, so that an output light beam of the light path reverser 7 vertically irradiates the photovoltaic cell panel 8 below, and the photovoltaic cell panel 8 is placed on a cell panel placing table 9; the xenon lamp 5 is provided with a xenon lamp power supply 2, and the xenon lamp power supply 2 is provided with a power supply starting button 3 and a pulse triggering button 4.
The xenon lamp 5 is connected to the special xenon lamp power supply 2 through a power line, and the xenon lamp power supply 2 is connected with 220V voltage for power supply. After the power supply starting button 3 is pressed down and waits for a few seconds, the pulse trigger button 4 is pressed down again and is pressed down continuously, and when a light beam irradiates from the light path reverser 7, the pulse trigger button 4 is released immediately. When the trigger lighting is unsuccessful, the system can forbid lighting, so as to avoid the damage of the trigger and the bulb caused by long-time continuous frequent lighting. Since the high intensity uv radiation of the xenon lamp 5 may damage the cornea, the lens and the retina of the eye, protective glasses should be worn before the xenon lamp 5 is lit. After the lamp is successfully lighted up, the light source chamber adjusting knob 6 is finely adjusted, so that the diameter of a light spot of parallel light output by the light source reaches the maximum. Meanwhile, the distance between the cell panel placing table 9 and the light path reverser 7 is adjusted, so that the light spot of the xenon lamp vertically irradiates the surface of the photovoltaic cell panel 8.
Based on the structure, the method for measuring the power loss of the pollution-caused photovoltaic power supply is implemented according to the following steps:
the existing research shows that in the open air, the output power of the photovoltaic cell panel 8 is mainly influenced by the working temperature and the received solar irradiance, therefore, when the influence of the filth coverage on the output of the photovoltaic cell panel 8 is measured, other factors influencing the power need to be controlled as much as possible,
1) controlling the room temperature in the laboratory to be kept at 25 ℃, wherein the positive and negative errors are not more than 1 ℃;
2) because of the unstable irradiance of sunlight under natural conditions, a xenon lamp 5 of type GLORIA-X500A was used as a solar simulator, providing an irradiance of 800W/m2The simulated light irradiation of (2); the xenon lamp 5 can emit stable connection in the range from ultraviolet to visible lightThe continuous spectrum line is a broadband light source with excellent performance, has the correlated color temperature (about 5800K) close to the sun, and is mostly used for simulating sunlight.
3) The wind speed affects and changes the distribution of surface dust and dirt, and a windless closed laboratory is used for measurement under the condition of no long-term uniform natural wind;
4) the dust weight was measured using a precision electronic scale 1, model XB220A, with a precision of 0.001 g;
5) the dust components in a natural state have regional differences, and the reflection, refraction and shielding effects of dust with different components on illumination are different; according to the existing component analysis, the accumulated dust mainly comprises quartz, calcite, a small amount of dolomite and mineral clay, the proportion of other components is low and can be ignored, and meanwhile, the difference of illumination influence caused by the difference of the four main components is small, so that the common dust can be collected.
6) Because the irradiation area of the xenon lamp is continuously adjustable from 3mm to 50mm in diameter, an effective irradiation area cannot be obtained due to the fact that the area of the photovoltaic cell panel 8 is too large, and output power is reduced. Therefore, a low-power 3W single crystal solar photovoltaic panel with a small area is selected as a measuring object, and a cement resistor with the resistance value of 100 omega is used as a load to be connected to two ends of an output lead of the photovoltaic panel 8.
By combining the above factors, the experimental platform for the contamination covered on the surface of the photovoltaic cell panel is shown in fig. 1, the xenon lamp power supply 2 supplies power to the xenon lamp 5, and the xenon lamp power supply are both placed on the experimental table 10. And after the power supply starting button 3 is pressed, the pulse trigger button 4 is continuously pressed for several seconds, and the pulse trigger button 4 is released after the light source is started. Finely tune light source room adjust knob 6, will shine the area and adjust to diameter 50mm, make the light source that xenon lamp 5 sent shine through light path reversion ware 7 and place photovoltaic cell board 8 on panel put table 9 in laboratory table 10 below.
the structure of the crystalline silicon photovoltaic module which is widely applied at present sequentially comprises an upper panel, an EVA (ethylene vinyl acetate) adhesive film, a battery piece, an EVA adhesive film and a back panel from top to bottom. When the assembly works, sunlight firstly passes through the upper panel and can be absorbed by the battery plates. At present, tempered low-iron glass with high light transmittance, polyacrylic resin or transparent polyester are generally adopted to manufacture an upper panel, and transparent light interference is utilized to form an antireflection film so as to reduce reflection loss of incident light. Because the smooth hydrophobicity that just possesses of 8 top panels of photovoltaic cell board, use superfine water smoke to cover the 8 top panels of photovoltaic cell board one deck behind the small drop of water when carrying out artifical ash covering, place 8 levels of photovoltaic cell board, the dust that the 100 mesh polyethylene fine mesh screen cloth that usable floor area and photovoltaic cell board 8 are close or slightly bigger will gather evenly sieves as far as possible and leaks to 8 top panels of photovoltaic cell board. The fine dust is covered on the surface of the superfine water mist, and after about 5 minutes, the water mist dries and adheres the dust to the upper panel of the photovoltaic cell panel 8. And slowly moving the photovoltaic cell panel 8 to the cell panel placing table 9 for horizontal placement. Care was taken to prevent the movement from being too fast and causing the dust to fly.
Step 3, measuring the output power and the dust covering density of the photovoltaic cell panel 8,
and after the dust covering is finished, starting the xenon lamp 5 to irradiate the photovoltaic cell panel 8. In the embodiment, a single crystal photovoltaic cell panel with the voltage of 6V and the rated power of 3W is connected with a cement resistor with the resistance value of 100 omega, a universal meter is used for measuring the output voltage and the output current of the photovoltaic cell panel 8, the measurement of the output power P of the dirty photovoltaic cell panel 8 is completed, and data are recorded;
using the precision electronic scale 1, after the power is switched on, pressing a switch key; putting a piece of packing paper on the inductor, closing glass doors on two sides of the storage box, pressing a reset button to stand for waiting for 0.0000g of screen display, slightly brushing dust on the upper panel of the photovoltaic cell panel 8 on the packing paper by using a thin brush, closing the glass doors, standing for reading the dust weight M after the reading is stable;
in the embodiment, the length l and the width w of the photovoltaic cell panel 8 are measured by using a ruler, the area S is calculated to be l × w, and the ash covering density ρ is further calculated to be M/S; because the covering ash produced by manual screening ash can not be quantitatively controlled, the data is sorted, and the sequencing records are sorted according to the covering ash density. Table 1 below shows 10 sets of data obtained in a number of experiments:
TABLE 1 output power and ash coating density measurement data sheet
Step 4, calculating the output power breakage rate of the photovoltaic cell panel 8 caused by dirt,
the power loss calculation is carried out, firstly, the normal output under the condition of no pollution and ash covering is obtained, and the normal output P is measured according to the flow in the step 3 under the condition of no ash covering of the photovoltaic cell panel 8NThen, the output power breakage rate τ (%) of the photovoltaic panel 8 is calculated according to the following formula:
the ash coverage density and the power breakage rate data compared with the clean panel are drawn into a curve, as shown in fig. 2, the data points are fitted by using a power function to obtain a function:
τ＝10.75ρ0.2605-2.968 (2)
wherein ρ is the coating density in g/m2(ii) a τ (%) is the output power breakage rate of the photovoltaic panel 8. The overall fitting effect of the function is good, and it can be seen that the larger the ash coating density is, the more the output power is reduced, and the curve gradually tends to be flat along with the further increase of the ash coating density.
The invention relates to another technical scheme that a traditional configuration method of a photovoltaic power supply is corrected under the condition of considering power conversion caused by dirt and dust covering, and the process is as follows:
most monitoring devices are balanced loads with the same average power consumption all the year round, and the average power of the monitoring devices under the condition of continuous collection can be set to be PtThe effective sunshine duration of an installation place is t, and the conversion efficiency of the solar panel is ηpv(typically 60%) safety volume factor KcTaking 1.1-1.5, and obtaining the configuration power P of the conventional photovoltaic cell panel 8 according to an industry empirical formulasComprises the following steps:
in the monitoring system of the photovoltaic power supply installed at present, devices such as pollution monitoring, radiation monitoring, power transmission line monitoring and the like have poor feasibility of a self-cleaning device which is manually cleaned or has high installation cost due to the limitation of installation positions or safety problems. FIG. 2 shows that when the coating density reaches about 12g/m2This, in turn, causes a drop in the output power of the photovoltaic panel 8 of about 17.5%. The effect of dust coverage on the output power of the photovoltaic panel 8 should therefore be taken into design consideration when the photovoltaic panel 8 cannot be cleaned for a long time. The dust covering situation is related to the environment around the installation site, and the high-altitude suspended particle environment, soil and dust components, wind speed, precipitation, industrial area distribution and the like all have certain influence on the dust degree. The photovoltaic cell panels 8 installed in heavy industrial polluted areas can reach the ash coverage of one year in vegetation-rich air-clean areas in several weeks. Therefore, the research angle, the composition, the dust covering speed and the like are not universal for widely distributed outdoor monitoring devices, and in comparison, the research on the power loss caused by different dust covering densities is more meaningful. When the photovoltaic power supply configuration is carried out on the outdoor monitoring device, the specification of the photovoltaic cell panel 8 is obtained by adopting the formula (3) calculation. Although the energy consumption, the sunshine duration and the photovoltaic efficiency of the device are considered, from the view of operation, even if a safety factor is introduced into a capacity estimation formula, the output power of the photovoltaic cell panel 8 is reduced due to low irradiance in winter, long-term dust accumulation and the like, and the photovoltaic power supply of the monitoring device cannot supply power according to design parameters. Furthermore, the storage battery of the monitoring device is easy to be in an undercharge state after complete discharge, so that acid stratification is caused for a long time, the bottom of the polar plate is corroded, the discharge depth is increased when the monitoring device works in a low charge state for a long time, the service life is shortened, and finally the monitoring device fails due to the fact that a power supply cannot work continuously.
The regional differences in dust settling velocity are large and it is difficult to give a fixed influencing parameter. The present invention considers the output power breakage rate τ (%) caused by different soot coating densities to the output power as the characterization quantity of soot coating. On a time scale, it is believed that the light transmittance loss due to dust is causedIs reflected in the equivalent sunshine duration, multiplying the sunshine duration t by the attenuation coefficient (1- τ) in equation (3), as shown in equation (4):
the value of tau can be taken according to local climate and building environment when designing the power supply, namely, a large value is taken for drought, sand blown by the wind and heavy industrial areas, and a small value is taken for humid areas with vegetation rich climate. The correction configuration formula can ensure the continuous operation of the monitoring device and the timely charging of the storage battery under the condition of certain degree of dust covering.
Claims (3)
1. A method for measuring power loss of a photovoltaic power supply caused by dirt is characterized by comprising the following steps:
step 1, constructing a pollution experiment scene covering the surface of a photovoltaic cell panel (8);
step 2, the surface of the photovoltaic cell panel (8) is covered with dirt;
step 3, measuring the output power and the dust covering density of the photovoltaic cell panel (8), and the concrete process is,
after dust covering is finished, starting a xenon lamp (5) to irradiate a photovoltaic cell panel (8), connecting a single crystal photovoltaic cell panel with the voltage of 6V and the rated power of 3W with a cement resistor with the resistance value of 100 omega, measuring the output voltage and the output current of the photovoltaic cell panel (8) by using a universal meter, completing the measurement of the output power P and recording data;
placing a piece of packing paper on a sensor by using a precision electronic scale (1), closing glass doors at two sides of a storage box, pressing a reset button, standing, waiting for a screen to display 0.0000g, lightly brushing dust on an upper panel of a photovoltaic cell panel (8) on the packing paper by using a thin brush, closing the glass doors, standing, reading the dust weight M after the reading is stable, and calculating the dust covering density rho;
step 4, calculating the output power breakage rate of the pollution-caused photovoltaic cell panel (8), and the specific process is that,
firstly, the normal output under the condition of no pollution and no ash covering is obtained, namely the normal output is pressed under the condition of no ash covering on the photovoltaic cell panel (8)The normal output P is determined according to the procedure of step 3NAnd calculating the output power breakage rate tau of the photovoltaic cell panel (8) according to the following formula:
drawing the ash covering density and the power breakage rate data compared with a clean panel into a curve, and fitting the data points by using a power function to obtain a function:
τ＝10.75ρ0.2605-2.968 (2)
wherein ρ is the coating density in g/m2(ii) a Tau is the output power breakage rate of the photovoltaic cell panel (8);
the output power loss rate caused by different dust covering densities to the output power is tau, the output power of the pollution-covered photovoltaic cell panel (8) is P, the effective sunshine duration of an installation place is t, and the conversion efficiency of the solar cell panel is ηpvCoefficient of safety capacity KcAs shown in formula (4):
the value of tau is determined according to local climate and building environment, and is relatively large for drought, sand blown by wind and heavy industrial areas, and relatively small for humid areas with rich vegetation climate.
2. The method for measuring the power breakdown of a photovoltaic power supply caused by pollution according to claim 1, wherein the method comprises the following steps: in the step 1, a pollution-covered experiment platform for the surface of a photovoltaic cell panel is adopted, and the structure of the experiment platform is that the experiment platform comprises a precise electronic scale (1) and a xenon lamp (5) which are placed on an experiment table (10), wherein the xenon lamp (5) is provided with a light source chamber adjusting knob (6), the xenon lamp (5) is connected with a light path reverser (7), a light output port of the light path reverser (7) corresponds to a photovoltaic cell panel (8) below, the xenon lamp (5) is placed at the edge of the experiment table (10), so that an output light beam of the light path reverser (7) vertically irradiates the photovoltaic cell panel (8) below, and the photovoltaic cell panel (8) is placed on a cell panel placing table (9); the xenon lamp (5) is provided with a xenon lamp power supply (2), the xenon lamp power supply (2) is provided with a power supply starting button (3) and a pulse trigger button (4), and the following factors are controlled:
1) controlling the room temperature in the laboratory to be kept at 25 ℃, wherein the positive and negative errors are not more than 1 ℃;
2) using a xenon lamp (5) as a solar simulator providing an irradiance of 800W/m2The simulated light irradiation of (2);
3) measuring by using a windless closed laboratory;
4) measuring the dust weight by using a precision electronic scale (1);
5) common dust is adopted;
6) A3W single-crystal solar photovoltaic panel is selected as a measuring object, and a cement resistor with the resistance value of 100 omega is used as a load to be connected to two ends of an output lead of a photovoltaic panel (8).
3. The method for measuring the power breakdown of a photovoltaic power supply caused by pollution according to claim 1, wherein the method comprises the following steps: in the step 2, when manual dust covering is carried out, after a layer of tiny water drops are covered on the upper panel of the photovoltaic cell panel (8), the photovoltaic cell panel (8) is horizontally placed, and collected dust is uniformly screened and leaked to the upper panel of the photovoltaic cell panel (8) by using a 100-mesh polyethylene fine screen; covering the surface of the superfine water mist with fine dust, waiting for 5 minutes, drying the water mist and adhering the dust to the upper panel of the photovoltaic cell panel (8); the photovoltaic cell panel (8) is slowly moved to the cell panel placing table (9) to be horizontally placed.
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Effective date of registration: 20221201 Address after: 710000 Room 22902, Building 1, Tianlang Lanhushu, Zhangba North Road, High tech Zone, Xi'an City, Shaanxi Province X86 Patentee after: Shaanxi Guocheng Power Technology Co.,Ltd. Address before: 710048 Shaanxi province Xi'an Beilin District Jinhua Road No. 19 Patentee before: XI'AN POLYTECHNIC University Effective date of registration: 20221201 Address after: 712000 Room 327, Floor 3, Podium Building, Block 3, Zone 3, Phase I, Energy Jinmao District, Fengdong New City, Xixian New Area, Xi'an, Shaanxi Patentee after: Shaanxi Guanglin Huicheng Energy Technology Co.,Ltd. Address before: 710000 Room 21502, Unit 2, Building 7, Tus Qingyang Times, No. 65, Keji Second Road, Hi tech Zone, Xi'an City, Shaanxi Province Patentee before: Xi'an Guanglin Huizhi Energy Technology Co.,Ltd. Effective date of registration: 20221201 Address after: 710000 No. 301, Unit 1, Building 3, No. 295, Youyi West Road, Beilin District, Xi'an, Shaanxi Patentee after: Li Jun Address before: 710000 Room 22902, Building 1, Tianlang Lanhushu, Zhangba North Road, High tech Zone, Xi'an City, Shaanxi Province X86 Patentee before: Shaanxi Guocheng Power Technology Co.,Ltd. Effective date of registration: 20221201 Address after: 710000 Room 21502, Unit 2, Building 7, Tus Qingyang Times, No. 65, Keji Second Road, Hi tech Zone, Xi'an City, Shaanxi Province Patentee after: Xi'an Guanglin Huizhi Energy Technology Co.,Ltd. Address before: 710000 No. 301, Unit 1, Building 3, No. 295, Youyi West Road, Beilin District, Xi'an, Shaanxi Patentee before: Li Jun |