CN103085430A - Electric heating laminating machine for uniformly heating solar cell module and heating method thereof - Google Patents
Electric heating laminating machine for uniformly heating solar cell module and heating method thereof Download PDFInfo
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- CN103085430A CN103085430A CN2013100045489A CN201310004548A CN103085430A CN 103085430 A CN103085430 A CN 103085430A CN 2013100045489 A CN2013100045489 A CN 2013100045489A CN 201310004548 A CN201310004548 A CN 201310004548A CN 103085430 A CN103085430 A CN 103085430A
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Abstract
The invention discloses an electric heating laminating machine for uniformly heating a solar cell module and a heating method thereof. The uniform heating method of the solar cell module comprises the following steps of: putting the solar cell module at the upper surface of a heating plate of the laminating machine; and heating the solar cell module by the heating plate. The uniform heating method is characterized by comprising the steps of: jacking the solar cell module placed at the upper surface of the heating plate by a thimble penetrating through the heating plate during the period that the solar cell module initially flows to a table board of the heating plate; keeping a certain distance between the solar cell module and the upper surface of the heating plate; and digging a plurality of blind holes in the bottom of the heating plate, and selectively installing a plurality of heating bodies of which the quantity is smaller than or equal to that of the blind holes into the corresponding blind hole in the plurality of blind holes, so as to adjust the quantity of the heating bodies in each area of the heating plate. Therefore, the uniform heating of the solar cell module by the heating plate is achieved.
Description
Technical field
The present invention relates to solar module encapsulation technology field, relate in particular to a kind of electric heating layer press and heating means thereof of homogeneous heating solar module.
Technical background
Solar cell power generation has formed an emerging industry now.High investment due to this industry, so corresponding equipment has also been proposed high request, laminating machine is one important procedure in the solar module production technology, its performance quality directly has influence on the service life of expensive solar module: as the temperature that is arranged on the heating plate in laminating machine controls and can have a direct impact EVA " Jiao Liandu " uniformity and best glue connection state, and then have influence on the service life of expensive solar module.
For the specific (special) requirements of this industry, there is in the market the laminating machine of multiple multi-form heating, as oil heating automatic lamination machine, be different from the electric heating layer press of the crawler belt electric blanket form that laterally runs through electric heating pipe type.But said two products all has the imperfection part on serviceability: the temperature control performance of oily zone of heating press is poor, and the energy-conserving and environment-protective performance is undesirable, poor stability; The temperature control performance of the electric heating layer press of crawler belt electric blanket form is poor, and heating surface area and pyroconductivity are little, and programming rate is undesirable.
Summary of the invention
Purpose of the present invention is exactly the problem that exists in order to overcome above-mentioned prior art, a kind of method of solar module homogeneous heating is provided, utilize homogeneous heating method of the present invention to the laminating machine of solar module heating, on the basis of the electric heating layer press advantage of having inherited oily zone of heating press and crawler belt electric blanket form, further perfect its temperature control performance is heated evenly solar module.
Another object of the present invention is to provide a kind of electric heating layer press of homogeneous heating solar module.
The first purpose according to the present invention provides a kind of method of solar module homogeneous heating, comprises the following steps:
Solar module is placed on the heating plate upper surface of laminating machine;
Utilize described heating plate that solar module is heated;
During solar module is initially flow into the heating plate table top, utilize the thimble that runs through described heating plate will be placed on the solar module jack-up of heating plate upper surface, make described solar module and heating plate upper surface keep certain distance;
Described heating plate bottom is dug numerous blind holes, and a plurality of calandrias that its quantity is less than or equal to blind hole quantity selectively are installed in corresponding blind hole in described numerous blind hole, in order to by adjusting the calandria quantity of heating plate regional, realize that heating plate is to the homogeneous heating of solar module.
Preferably, every three calandrias form a heating unit, in order to be each heating unit power supply by three-phase electricity; And in the corresponding blind hole of described numerous blind holes, a plurality of temperature sensors are installed respectively.
Preferably, the step of the described numerous blind holes of cutting comprises:
Dig numerous vertical-type blind cylindrical hole of the same size in heating plate bottom, the distribution density of described blind cylindrical hole is even, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
Preferably, the step of the described numerous blind holes of cutting also comprises:
Dig numerous vertical-type blind cylindrical hole of the same size in heating plate bottom, the distribution density of described blind cylindrical hole can be adjusted according to the heat radiation situation of heating plate, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
Preferably, the method for solar module homogeneous heating, further comprising the steps of:
Described heating plate is divided into angle heating region, limit heating region and middle heating region;
The heating unit of different capacity is set respectively for described different heating region, and the stepped distribution of its watt level.
The second purpose according to the present invention provides a kind of electric heating layer press of homogeneous heating solar module, comprising:
Be used for placing the heating plate of solar module;
For described heating plate, solar module is heated the heating control apparatus that electric energy is provided;
The thimble that runs through described heating plate is used for will being placed on the solar module jack-up of heating plate upper surface during solar module is initially flow into the heating plate table top, makes described solar module and heating plate upper surface keep certain distance;
Wherein, described heating plate bottom is dug numerous blind holes, and a plurality of calandrias that its quantity is less than or equal to blind hole quantity selectively are installed in corresponding blind hole in described numerous blind hole, in order to by adjusting the calandria quantity of heating plate regional, realize that heating plate is to the homogeneous heating of solar module.
Preferably, the temperature sensor of described heating control apparatus is arranged in the corresponding blind hole of described numerous blind holes.
Preferably, the electric heating layer press of homogeneous heating solar module also comprises:
The thermal insulation layer that is arranged on described heating plate below and is connected with its bottom surface;
Pass the guide pipe of described thermal insulation layer and heating plate, described thimble is installed in it, be used for guiding described thimble to move up and down;
Be arranged on the bar magnet of described guide pipe bottom;
To the magnetic drive apparatus that described bar magnet drives, when being used for moving down thereon, move up and down by the described bar magnet of magnetically-actuated.
Preferably, described magnetic drive apparatus comprises:
Be arranged on the annular magnet of described guide pipe bottom periphery, its installation site and described bar magnet adapt;
The aluminum frame that is arranged on described annular magnet below and is fixedly connected with its bottom surface offers the through hole corresponding with described guide pipe installation site on it;
Be arranged on described aluminum frame below and connected three axle cylinders, be used for the described aluminum frame of jack-up;
Wherein, described through hole is used for the bottom of described guide pipe is inserted into the inner, so that described guide pipe is done the up and down relative motion by described through hole with respect to aluminum frame.
Preferably, each described calandria forms by insulation shell and heating winding, and the heating winding is embedded in insulation shell, and heating unit of every three calandrias composition, in order to be each heating unit power supply by three-phase electricity
Beneficial effect of the present invention embodies in the following areas:
1, the present invention adopts thimble jack-up solar module, makes solar module by the heat radiation thermally equivalent.
2, the present invention by the cooperation adjustment of calandria quantity and power, has realized accurately controlling flexibly of temperature.
3, calandria of the present invention adopts the three phase mains power supply, can realize three-phase equilibrium.
4, heating unit of the present invention adopts parallel form, and the maintenance of equipment rate is low, and the durability of laminating machine is improved.
5, temperature sensor of the present invention adopts the form that is embedded in heating plate, but the true temperature of Real-time Collection heating plate, in order to accurately control heating-up temperature.
6, calandria of the present invention is embedded in heating plate its heating, can increase to greatest extent heating surface (area) (HS and pyroconductivity, energy-conserving and environment-protective.
7, the present invention can realize the solar module thermally equivalent, increases the service life, and saves cost.
Description of drawings
Fig. 1 is the structural representation of the heating winding of calandria of the present invention;
Fig. 2 is the structural representation of the insulation shell of calandria of the present invention;
Fig. 3 is that heating unit of the present invention supplies electrical schematic by three phase mains;
Fig. 4 is the structural representation of heating plate of the present invention;
Fig. 5 is that the A-A of the present invention's heating plate shown in Figure 4 is to view;
Fig. 6 is thimble of the present invention and heating plate mounting structure schematic diagram;
Fig. 7 is that embodiments of the invention heating plate heating region is divided schematic diagram.
The specific embodiment
Be described in detail the present invention below in conjunction with specific embodiment.
The invention provides a kind of electric heating layer press of homogeneous heating solar module, as shown in Figure 6, comprising: the heating plate 5 that is used for placing solar module; For 5 pairs of solar modules of heating plate heat the heating control apparatus that electric energy is provided; The thimble 9 that runs through heating plate 5 is used for will being placed on the solar module jack-up of heating plate 5 upper surfaces during solar module is initially flow into the heating plate table top, makes described solar module and heating plate 5 upper surfaces keep certain distance.
Particularly, the monoblock heating plate adopts large-sized gantry to mill by technological requirement and processes, and as shown in Figure 5, whole heating plate 5 comprises upper surface 5a and bottom 5b, and the upper surface of whole heating plate must reach the technological requirement in industry.As shown in Figure 4, the bottom 5b of heating plate has dug numerous blind holes 6, a plurality of calandrias 4 are embedded in blind hole 6, calandria quantity is less than or equal to blind hole quantity, and these a plurality of calandrias 4 selectively are installed in corresponding blind hole in numerous blind holes, in order to by adjusting calandria 4 quantity of heating plate 5 regionals, realize that heating plate is to the homogeneous heating of solar module according to specific requirement.In practical operation, the spacing between blind hole 6 can be processed adjustment according to the actual process experience, further satisfies technological requirement; The thickness of whole heating plate also can be adjusted according to the technique experience of reality simultaneously.
Wherein, each calandria 4 of the present invention is by insulation shell 3(as shown in Figure 2) and heating winding 1(is as shown in Figure 1) form, heating winding 1 is embedded in insulation shell 3, forms the calandria of an integral body.When being installed to calandria 4 in blind hole 6, at first heater strip passes blind hole 6 and wire casing 2 and is wrapped on heating winding 1 (as shown in Figure 1), and the heating winding 1 that then will be wound with heater strip is embedded in insulation shell 3.During practical operation, as shown in Figure 3, three calandrias 4 form a heating unit, and each heating unit is powered by three phase mains, and an end of every three calandrias 4 is connected on respectively on A, B, C three phase mains, and the other end all is connected on zero line N.A large amount of heating units is arranged on heating plate 5 bottoms by the form of inlaying, has increased to greatest extent heating surface (area) (HS and pyroconductivity; Heating unit is powered by three phase mains, can guarantee three-phase equilibrium, is the basis of thermal evenness controlling; Heating unit is installed with the form of parallel connection, and the maintenance of equipment rate is low, improves controllability.
As shown in Figure 4, heating control apparatus comprises: the microprocessor control system that is arranged on temperature sensor in the corresponding blind hole of numerous blind holes, controls controllable silicon that heating unit heats solar module, is connected with controllable silicon with temperature sensor.When by heating control apparatus, heating plate 5 being heated, microprocessor control system is controlled controllable silicon to being arranged on the heating unit heating heating plate 5 in blind hole 6, controllable silicon carries out the PWM Duty ratio control to A, B, C three phase mains, can realize according to actual process demand regulation output power, and then control heating unit heating heating plate 5; Be arranged on the temperature of temperature sensor Real-time Collection its corresponding region in corresponding blind hole 6 and the temperature signal that collects in time is delivered to microprocessor control system, microprocessor control system by constantly to each real time temperature signal carry out laterally, longitudinal comparison and association, thereby in time regulate the heating-up temperature of heating plate regional, realize the purpose to the solar module homogeneous heating.
As shown in Figure 6, the electric heating layer press of homogeneous heating solar module of the present invention also comprises: the thermal insulation layer 7 that is arranged on heating plate 5 belows and is connected with its bottom surface, play the effect of heat-insulation and heat-preservation to heating plate 5; Pass the guide pipe 8 of thermal insulation layer 7 and heating plate 5, stop nut 15, thimble 9 and bar magnet 10 are installed in this guide pipe 8, and wherein, stop nut 15 is arranged on the top of guide pipe 8, bar magnet 10 is arranged on guide pipe 8 bottoms, jack-up thimble 9 when bar magnet 10 is used for moving up; To the magnetic drive apparatus that bar magnet 10 drives, when being used for moving down thereon, move up and down by magnetically-actuated bar magnet 10.
Particularly, magnetic drive apparatus comprises: be arranged on the annular magnet 11 of guide pipe 8 bottom periphery, its installation site and bar magnet 10 adapt, and are used for bar magnet 10, magneticaction occuring; The aluminum frame 13 that is arranged on annular magnet 11 belows and is fixedly connected with its bottom surface, offer the through hole 13a corresponding with guide pipe 8 installation sites on it, when this through hole 13a did the up and down relative motion for guide pipe 8 with respect to aluminum frame 13, the bottom of guide pipe 8 inserted into the inner and moves up and down;
Be arranged on aluminum frame 13 belows and connected three axle cylinders 14, be used for jack-up aluminum frame 13.
Wherein, annular magnet 11 is fixed on aluminum frame 13 by magnet fixed block 12.
the operation principle of thimble 9 is as follows: three axle cylinders 14 are with aluminum frame 13 jack-up that are located thereon, the bottom of guide pipe 8 moves down with respect to the through hole of the aluminum frame corresponding with it 13 at this moment, the relative guide pipe 8 of aluminum frame 13 moves up, the annular magnet 11 that is arranged on aluminum frame 13 moves up with respect to bar magnet 10, according to the magnetic interaction principle, bar magnet 10 is for keeping the magnetic poised state to move up along with annular magnet 11, thereby with thimble 9 jack-up, thimble 9 stretches out heating plate 5 one segment distances, due to the limited block 9a that arranges on thimble 9 and stop nut 15 actings in conjunction that are arranged on guide pipe 8 tops, limited the height that thimble rises.
The method of the present invention to the solar module homogeneous heating comprises the following steps:
Solar module is placed on the heating plate upper surface of laminating machine;
Utilize heating plate that solar module is heated;
During solar module is initially flow into the heating plate table top, the thimble 9 that utilization runs through heating plate 5 will be placed on the solar module jack-up of heating plate 5 upper surfaces, make solar module and heating plate 5 upper surfaces keep certain distance, this moment, heating plate 5 heated solar module by heat radiation, reduce solar module internal temperature difference, so that thermally equivalent.
Wherein, as shown in Figure 4, heating plate 5 bottoms are dug numerous blind holes 6, and a plurality of calandrias 4 that its quantity is less than or equal to blind hole quantity selectively are installed in corresponding blind hole in described numerous blind hole, in order to by adjusting calandria 4 quantity of heating plate 5 regionals, realize the homogeneous heating of 5 pairs of solar modules of heating plate.
As shown in Figure 3, every three calandrias 4 form a heating unit, in order to be each heating unit power supply by three-phase electricity, and are connected in parallel between all heating units, and the maintenance of equipment rate is low, and the durability of laminating machine is improved.
In the corresponding blind hole of numerous blind holes, a plurality of temperature sensors are installed respectively, but the true temperature of Real-time Collection heating plate 5 and it is sent back microprocessor control system, in order to accurately control heating-up temperature.
For solar module homogeneous heating effect is reached better, when being heated, also takes solar module following steps:
The heating unit of different capacity is set respectively for different heating regions, and the stepped distribution of its watt level.
For solar module homogeneous heating effect is reached better, the step of digging numerous blind holes 6 comprises:
Dig numerous vertical-type blind cylindrical hole 6 of the same size in heating plate 5 bottoms, the distribution density of described blind cylindrical hole 6 is even, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
For solar module homogeneous heating effect is reached better, the step of digging numerous blind holes 6 also comprises:
In the heating plate 5 numerous vertical-type blind cylindrical hole 6 of the same size of bottoms cutting, the distribution density of described blind cylindrical hole 6 can be adjusted according to the heat radiation situation of heating plate 5, such as around colder local distribution density height a bit, the place that central temperature is higher, density is a little low, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
Be described in detail the method for utilizing 5 pairs of solar module homogeneous heatings of heating plate of the present invention below in conjunction with accompanying drawing.
When just heating, there is the huge temperature difference due to solar module between heating plate and solar module, can causes solar module surrounding and central temperature uneven, warping phenomenon occurs.For addressing this problem, the present invention has installed thimble 9 in laminating machine inside, and the specific works process is as follows:
The solar module to be heated that stack is good is transported in heating chamber, solar module to be heated by thimble 9 jack-up, does not directly contact with heating plate 5, by the heat radiation thermally equivalent at this moment, reduced solar module internal temperature difference, warpage degree has been dropped to minimum; Simultaneously, vacuum system is found time to solar module, so that next procedure.
Simultaneously the temperature of heating plate 5 being adapted to control reaches the solar module homogeneous heating, and concrete steps are as follows:
As shown in Figure 7, heating plate 5 is divided into angle heating region, limit heating region and middle heating region, wherein, the angle heating region comprises four angles, and the limit heating region comprises four edges, and middle heating region also can be divided according to actual needs in detail;
At each heating region, the calandria 4 that is less than or equal to blind hole 6 quantity is installed according to actual needs, and each heating region is all inlayed the temperature sensor for collecting temperature, heating region is corresponding one by one with temperature sensor, reaches the independent purpose of controlling in each zone.
Like this, according to the actual process needs, by to heating plate 5 zonings, each regional calandria 4 quantity are adjusted; And in real time the temperature that collects is sent back microprocessor control system by temperature sensor and comprehensively compare, in time adjust the silicon controlled power output, realize the homogeneous heating of solar module.
Simultaneously the temperature of heating plate 5 being adapted to control reaches the solar module homogeneous heating, and concrete steps are as follows:
As shown in Figure 7, heating plate 5 is divided into angle heating region, limit heating region and middle heating region, wherein, the angle heating region comprises four angles, and the limit heating region comprises four edges, and middle heating region also can be divided according to actual needs in detail;
At each heating region, the calandria 4 that is less than or equal to blind hole 6 quantity is installed according to actual needs, and each heating region is all inlayed the temperature sensor for collecting temperature, heating region is corresponding one by one with temperature sensor, reaches the independent purpose of controlling in each zone; In addition, different heating regions arranges respectively the heating unit of different capacity, and the stepped distribution of its watt level.
Like this, according to the actual process needs, by to heating plate 5 zonings, each regional calandria 4 quantity and power are coordinated adjustment; And in real time the temperature that collects is sent back microprocessor control system by temperature sensor and comprehensively compare, in time adjust the silicon controlled power output, realize the homogeneous heating of solar module.
Simultaneously the temperature of heating plate 5 being adapted to control reaches the solar module homogeneous heating, and concrete steps are as follows:
As shown in Figure 7, heating plate 5 is divided into angle heating region, limit heating region and middle heating region, wherein, the angle heating region comprises four angles, and the limit heating region comprises four edges, and middle heating region also can be divided according to actual needs in detail;
At each heating region, the calandria 4 that equals blind hole 6 quantity is installed according to actual needs, and each heating region all inlays the temperature sensor for collecting temperature, heating region is corresponding one by one with temperature sensor, reaches purpose of each zone independence control; In addition, different heating regions arranges respectively the heating unit of different capacity, and the stepped distribution of its watt level.
Like this, according to the actual process needs, by to heating plate 5 zonings, each regional calandria 4 power are adjusted; And in real time the temperature that collects is sent back microprocessor control system by temperature sensor and comprehensively compare, in time adjust the silicon controlled power output, realize the homogeneous heating of solar module.
Although above-mentioned the present invention is described in detail; but the invention is not restricted to this; those skilled in the art can principle according to the present invention modify, and therefore, all various modifications of carrying out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (10)
1. the method for a solar module homogeneous heating comprises the following steps:
Solar module is placed on the heating plate upper surface of laminating machine;
Utilize described heating plate that solar module is heated;
It is characterized in that:
During solar module is initially flow into the heating plate table top, utilize the thimble that runs through described heating plate will be placed on the solar module jack-up of heating plate upper surface, make described solar module and heating plate upper surface keep certain distance;
Described heating plate bottom is dug numerous blind holes, and a plurality of calandrias that its quantity is less than or equal to blind hole quantity selectively are installed in corresponding blind hole in described numerous blind hole, in order to by adjusting the calandria quantity of heating plate regional, realize that heating plate is to the homogeneous heating of solar module.
2. the method for solar module homogeneous heating according to claim 1, is characterized in that, every three calandrias form a heating unit, in order to be each heating unit power supply by three-phase electricity; And in the corresponding blind hole of described numerous blind holes, a plurality of temperature sensors are installed respectively.
3. the method for solar module homogeneous heating according to claim 2, is characterized in that, the step of digging described numerous blind holes comprises:
Dig numerous vertical-type blind cylindrical hole of the same size in heating plate bottom, the distribution density of described blind cylindrical hole is even, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
4. the method for solar module homogeneous heating according to claim 2, is characterized in that, the step of digging described numerous blind holes also comprises:
Dig numerous vertical-type blind cylindrical hole of the same size in heating plate bottom, the distribution density of described blind cylindrical hole can be adjusted according to the heat radiation situation of heating plate, and three blind cylindrical hole of arbitrary neighborhood in a triangle dot matrix arrange.
5. the method for according to claim 3 or 4 described solar module homogeneous heatings, is characterized in that, and is further comprising the steps of:
Described heating plate is divided into angle heating region, limit heating region and middle heating region;
The heating unit of different capacity is set respectively for described different heating region, and the stepped distribution of its watt level.
6. the electric heating layer press of a homogeneous heating solar module comprises:
Be used for placing the heating plate of solar module;
For described heating plate, solar module is heated the heating control apparatus that electric energy is provided;
It is characterized in that, also comprise the thimble that runs through described heating plate, be used for to be placed on the solar module jack-up of heating plate upper surface during solar module is initially flow into the heating plate table top, make described solar module and heating plate upper surface keep certain distance;
Wherein, described heating plate bottom is dug numerous blind holes, and a plurality of calandrias that its quantity is less than or equal to blind hole quantity selectively are installed in corresponding blind hole in described numerous blind hole, in order to by adjusting the calandria quantity of heating plate regional, realize that heating plate is to the homogeneous heating of solar module.
7. the electric heating layer press of homogeneous heating solar module according to claim 6, is characterized in that, the temperature sensor of described heating control apparatus is arranged in the corresponding blind hole of described numerous blind holes.
8. the electric heating layer press of homogeneous heating solar module according to claim 7, is characterized in that, also comprises:
The thermal insulation layer that is arranged on described heating plate below and is connected with its bottom surface;
Pass the guide pipe of described thermal insulation layer and heating plate, described thimble is installed in it, be used for guiding described thimble to move up and down;
Be arranged on the bar magnet of described guide pipe bottom;
To the magnetic drive apparatus that described bar magnet drives, when being used for moving down thereon, move up and down by the described bar magnet of magnetically-actuated.
9. the electric heating layer press of homogeneous heating solar module according to claim 8, is characterized in that, described magnetic drive apparatus comprises:
Be arranged on the annular magnet of described guide pipe bottom periphery, its installation site and described bar magnet adapt;
The aluminum frame that is arranged on described annular magnet below and is fixedly connected with its bottom surface offers the through hole corresponding with described guide pipe installation site on it;
Be arranged on described aluminum frame below and connected three axle cylinders, be used for the described aluminum frame of jack-up;
Wherein, described through hole is used for the bottom of described guide pipe is inserted into the inner, so that described guide pipe is done the up and down relative motion by described through hole with respect to aluminum frame.
10. the electric heating layer press of homogeneous heating solar module according to claim 9, it is characterized in that, each described calandria forms by insulation shell and heating winding, the heating winding is embedded in insulation shell, and every three calandrias form a heating unit, in order to be each heating unit power supply by three-phase electricity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100045489A CN103085430A (en) | 2013-01-07 | 2013-01-07 | Electric heating laminating machine for uniformly heating solar cell module and heating method thereof |
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| CN2013100045489A CN103085430A (en) | 2013-01-07 | 2013-01-07 | Electric heating laminating machine for uniformly heating solar cell module and heating method thereof |
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| CN106601868A (en) * | 2016-12-05 | 2017-04-26 | 湖南红太阳光电科技有限公司 | Solar cell anti-light-decay method and anti-light-decay annealing furnace |
| CN109049933A (en) * | 2018-09-21 | 2018-12-21 | 营口金辰太阳能设备有限公司秦皇岛分公司 | Photovoltaic solar cell component laminator and laminating machine composite electric heating piece |
| CN109049934A (en) * | 2018-09-25 | 2018-12-21 | 北京铂阳顶荣光伏科技有限公司 | laminating machine and laminating method |
| CN112333861A (en) * | 2020-11-17 | 2021-02-05 | 北京理工大学 | Battery heating film with variable heating power and lithium ion battery |
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Application publication date: 20130508 |