Gas ionization mechanism and coating equipment

Abstract

The utility model discloses a gas ionization mechanism and coating equipment, relates to battery piece production technical field, include: ventilation cavity, first electrode plate, second electrode plate and power supply, the first side of ventilation cavity is connected with gas supply unit, gas supply unit supplies gas to the inside of ventilation cavity, the second side of ventilation cavity is equipped with the discharge port, the discharge port is equipped with the first electrode plate, second electrode plate and power supply. The first electrode plate and the second electrode plate are arranged parallel to the second side of the ventilation cavity and are respectively connected with two different electrodes of a power supply, and gas is ionized into a positive ion form after being introduced into a uniform electric field formed between the first electrode plate and the second electrode plate. The gas ionization mechanism and the evaporation mechanism are arranged in the shell, the gas ionization mechanism and the evaporation mechanism provide ionized hydrogen ions and gaseous aluminum oxide molecules to the interior of the shell at the same time so as to jointly participate in the coating reaction of the battery piece, and the coating quality of the battery piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery piece production technical field especially relates to a kind of gas ionization mechanism and coating equipment. BACKGROUND

[0002] In the battery piece preparation process, the surface or the cutting surface of the battery piece is coated with film process, which is a crucial link in the solar photovoltaic power generation system. Through the coating process, light energy can be better converted into electrical energy, thereby improving the efficiency of the solar cell. Among them, by introducing special gas into the inside of the coating furnace body, the dissociated special gas forms ions of different elements, and part of the element ions are used to participate in the passivation coating reaction, thereby forming a high-quality passivation film layer, effectively reducing the recombination rate of the battery piece surface, improving the photoelectric conversion efficiency, and ensuring the stability and durability of the battery piece in long-term use. However, the existing gas ionization mechanism has deficiencies in ionization efficiency and uniformity, and cannot fully ionize the gas introduced into the coating furnace body. The gas that is not fully ionized will participate in the passivation coating reaction, resulting in a decrease in film quality and affecting the photoelectric conversion efficiency. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of gas ionization mechanism and coating equipment.

[0004] In the first aspect, a gas ionization mechanism includes: a gas cavity, a first electrode plate, a second electrode plate, and a power supply. The first side of the gas cavity is connected to a gas supply unit, which provides gas to the inside of the gas cavity. The second side of the gas cavity is provided with a discharge port. The first electrode plate and the second electrode plate are parallel to the second side of the gas cavity and are respectively connected to two different electrodes of the power supply.

[0005] Optionally, the first side and the second side of the gas cavity are opposite sides. The second electrode plate is directly connected to the outside of the second side of the gas cavity. The first electrode plate is indirectly connected to the side of the second electrode plate away from the gas cavity. The second electrode plate is provided with a plurality of second gas holes. The first electrode plate is provided with a plurality of first gas holes.

[0006] Optionally, the number of first gas holes is greater than the number of second gas holes, and the diameter of the second gas hole is greater than the diameter of the first gas hole.

[0007] Optionally, it further includes a cover plate connected to the outside of the first side of the gas cavity. The first side of the gas cavity is provided with an air duct. The air duct is provided with two or more gas inlet holes communicating with the inside of the gas cavity.

[0008] Optionally, the first electrode plate is connected to the gas cavity by an insulating column.

[0009] Optionally, the first electrode plate is connected to the negative terminal of the power supply, and the second electrode plate is connected to the positive terminal of the power supply.

[0010] Optionally, the device includes a microwave generator that penetrates and connects to the third side of the ventilation cavity, and a coil is also provided inside the ventilation cavity, with the microwave generator facing the coil.

[0011] Secondly, a coating apparatus includes a housing, a vapor deposition mechanism, and any one of the aforementioned gas ionization mechanisms. The gas ionization mechanism is detachably connected to the housing via a flange. The housing is used to place a battery cell to be coated. Both the gas ionization mechanism and the vapor deposition mechanism are located inside the housing and below the battery cell. The gas ionization mechanism is used to ionize hydrogen gas into hydrogen ions, and the vapor deposition mechanism is used to vaporize solid alumina into alumina molecules.

[0012] Compared with existing technologies, the gas ionization mechanism proposed in this invention has the following advantages: It employs two electrode plates, a first electrode plate and a second electrode plate connected to different electrodes, to form a uniform electric field between them. The gas is ionized into free electrons and positive ions after passing through this uniform electric field. The gas is efficiently ionized under the action of the uniform electric field, and the ionized ions are used to fully participate in the coating reaction of the solar cell, improving the coating quality. Furthermore, the coating equipment proposed in this invention, by optimizing the ionization efficiency of the gas ionization mechanism and the layout of the vapor deposition mechanism, ensures that hydrogen gas is fully ionized into hydrogen ions, and that hydrogen ions and alumina molecules can uniformly cover the surface of the solar cell, neutralizing the dangling bonds on the surface and forming an alumina film, further improving coating uniformity and adhesion, and extending the service life of the solar cell. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the first gas ionization mechanism proposed in this utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the bottom structure of the central ventilation chamber;

[0016] Figure 3 This is a schematic diagram of the structure of the second gas ionization mechanism proposed in this utility model.

[0017] Wherein, the reference signs are:

[0018] 1, ventilation cavity; 11, airway; 2, first electrode plate; 3, second electrode plate; 4, insulating column;

[0019] 5, cover plate; 6, coil; 7, microwave generator; 8, flange. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0022] As Figure 1 shown, the gas ionization mechanism provided in the present application includes a ventilation cavity 1, a first electrode plate 2, a second electrode plate 3, and a power supply connected with the first electrode plate 2 and the second electrode plate 3. The positive and negative poles of the power supply are connected with the first electrode plate 2 and the second electrode plate 3 respectively. The first side of the ventilation cavity 1 is connected with a gas supply unit, which is used to provide the gas to be ionized into the ventilation cavity 1. The second side of the ventilation cavity 1 is provided with a discharge port. The first electrode plate 2 and the second electrode plate 3 are parallel to the second side of the ventilation wall and are connected with two different electrodes of the power supply respectively.

[0023] After the gas is introduced into the ventilation cavity, it is discharged from the discharge port of the ventilation cavity and passes through the first electrode plate and the second electrode plate. When the gas passes between the first electrode plate 2 and the second electrode plate 3, a voltage is applied to the first electrode plate 2 and the second electrode plate 3. After being electrified, a uniform electric field is formed between them. The charged ions in the gas move to the negative pole in the direction of the electric field, and the negative ions move to the positive pole, forming a weak current. The current intensity is proportional to the electric field intensity and the ion concentration. The degree of gas ionization is enhanced accordingly. When the electric field intensity reaches about 10 kV / cm, the charged ions move at high speed, and the electrons and neutral gas molecules have inelastic collision, generating more free electrons and positive ions. For example, hydrogen gas is introduced into the uniform electric field. Hydrogen molecules are ionized into hydrogen ions and electrons under the action of the electric field. The electrons further excite more hydrogen molecules to ionize, forming plasma, thereby realizing efficient gas ionization.

[0024] In some embodiments, the first side and the second side of the ventilation cavity 1 are oppositely arranged, the second electrode plate 3 is arranged outside the second side, the first electrode plate 2 is indirectly connected to one side of the second electrode plate 3 away from the ventilation cavity 1, and a plurality of second ventilation holes are arranged on the second electrode plate 3, and a plurality of first ventilation holes are arranged on the corresponding first electrode plate 2 to ensure that the gas is uniformly distributed through the electric field region between the first electrode plate 2 and the second electrode plate 3. The ions after ionization are discharged through the discharge port to form a stable plasma flow. The gas ionization mechanism can maximize the ionization efficiency by precisely controlling the electric field strength and the gas flow rate.

[0025] The utility model discloses through optimizing electrode layout and ventilation structure, ensure that gas is high -efficient ionization in uniform electric field, promote membrane layer quality to improve the overall performance and durability of battery piece significantly.

[0026] In some embodiments, the number of first ventilation holes is greater than the number of second ventilation holes, and the aperture of the second ventilation hole is greater than the aperture of the first ventilation hole, to optimize the gas flow rate and ionization uniformity and improve the ionization effect.

[0027] In some embodiments, as shown in Figure 2 The gas ionization mechanism further includes a cover plate 5 connected to the first side of the ventilation cavity 1, the first side of the ventilation cavity 1 is provided with an air passage 11, and the air passage 11 is provided with two or more gas inlet holes in communication with the inside of the ventilation cavity 1 to ensure that the gas can uniformly enter the inside of the ventilation cavity 1. The number and size of the gas inlet holes can be adjusted as needed to optimize the distribution of the gas and the ionization effect.

[0028] In addition, a sealing gasket can be arranged between the cover plate 5 and the ventilation cavity 1 to ensure the sealing of the ventilation cavity 1, so that the hydrogen ions after ionization can be sent out from the only passage, i.e. the hydrogen ions after ionization are sent out from the discharge port of the ventilation cavity 1 to participate in the film plating reaction in the battery piece film plating reaction structure.

[0029] In some embodiments, the first electrode plate 2 is indirectly connected to the ventilation cavity 1 through an insulating column 4, and the second electrode plate 3 is directly connected to the ventilation cavity 1 to ensure the stability of the electric field between the first electrode plate 2 and the second electrode plate 3, while avoiding the influence of the electric current on the ventilation cavity 1. The material of the insulating column 4 can be selected from materials with good insulating properties such as ceramics and glass to improve the safety and reliability of the equipment.

[0030] Specifically, the first electrode plate 2 is connected to the negative terminal of the power supply, and the second electrode plate 3 is connected to the positive terminal. The electric field between the first electrode plate 2 and the second electrode plate 3 points from the negative terminal to the positive terminal, ensuring that hydrogen ions and electrons move towards the second electrode plate 3 and the first electrode plate 2 respectively under the influence of the electric field, forming a stable current. After passing through the first electrode plate 2, hydrogen gas is ionized into hydrogen ions and electrons. The positively charged hydrogen ions move towards the negative terminal, and the negatively charged electrons move towards the positive terminal. During this movement, electrons undergo inelastic collisions with neutral hydrogen molecules, ionizing more hydrogen molecules and forming a stable plasma flow. This plasma flow is discharged through the first vent of the first electrode plate 2 and enters the coating furnace, participating in the coating reaction on the surface of the solar cell. It is used to neutralize dangling bonds on the surface or cut surface of the solar cell, thereby improving coating efficiency and quality.

[0031] In addition, refer to Figure 3 As shown, the gas ionization mechanism of this invention also includes a microwave generator 7, which is connected through to the third side of the ventilation cavity 1. The third side is adjacent to the first or second side of the ventilation cavity, but does not coincide with the first or second side. A coil 6 is also provided inside the ventilation cavity 1, with the microwave generator 7 directly opposite the coil 6. The microwave energy generated by the microwave generator 7 can further excite the electrons around the coil 6, causing them to collide with neutral gas molecules and generate more free electrons and positive ions, thereby further improving the gas ionization efficiency.

[0032] This gas ionization mechanism, by combining the effects of electric field and microwave, not only improves the ionization efficiency of the gas, but also optimizes the ionization uniformity, making the plasma flow after ionization more stable, thereby improving the coating efficiency and quality.

[0033] In a specific embodiment, the material and shape of the coil 6 can be selected as needed to optimize microwave energy transmission and ionization effects. Simultaneously, the power and frequency of the microwave generator 7 can be adjusted according to the requirements of the coating process to meet the needs of different battery cell coatings.

[0034] Preferably, the coil 6 is made of a metal with good electrical conductivity, such as copper or aluminum, to ensure effective microwave energy transfer and enhanced ionization. The operating frequency and power of the microwave generator 7 can be adjusted according to actual needs to achieve the best gas ionization effect.

[0035] In another aspect, the utility model provides a kind of coating equipment, coating equipment includes shell, evaporation mechanism and above-mentioned any kind of gas ionization mechanism, gas ionization mechanism is detachably connected with shell by flange 8, the battery piece to be plated is placed inside shell, gas ionization mechanism and evaporation mechanism are all arranged in shell interior, and located below the battery piece in shell, gas ionization mechanism is used to ionize hydrogen into hydrogen ion, evaporation mechanism is used to vaporize solid aluminium oxide into aluminium oxide molecule, hydrogen ion and aluminium oxide molecule jointly participate in coating reaction, hydrogen ion and gaseous aluminium oxide molecule jointly participate in the coating reaction of battery piece, hydrogen ion and the dangling bond of battery piece surface neutralize, aluminium oxide molecule forms uniform and dense aluminium oxide film on battery piece surface, effectively improves the corrosion resistance and photoelectric conversion efficiency of battery piece.

[0036] In coating process, solid aluminium oxide is placed in passivation furnace body, evaporation mechanism evaporates gaseous aluminium oxide after heating solid aluminium oxide, and gaseous aluminium oxide and hydrogen ion after ionization by gas ionization mechanism occur coating reaction on the surface of battery piece, neutralize the dangling bond of battery piece surface or cutting surface while forming the coating layer of aluminium oxide.The coating layer can improve the conversion efficiency and service life of battery piece, thereby improving the performance of solar cell piece.

[0037] In conclusion, the gas ionization mechanism and coating equipment provided by the utility model improve coating efficiency and quality by optimizing gas flow rate and ionization effect, and provide a new solution for battery piece production technology field.

[0038] In conclusion, the gas ionization mechanism and coating equipment provided by the utility model form uniform electric field by using two first electrode plates 2 and second electrode plates 3 connected with different electrodes, so that gas is ionized into neutral molecules and free electrons after passing through uniform electric field, thereby realizing efficient gas ionization.Meanwhile, by optimizing the number and aperture of air hole, setting air inlet hole and temperature sensor and other measures, ionization effect is further improved, so that ion participating in battery piece coating is more sufficient, and coating quality of battery piece is improved.The gas ionization mechanism and coating equipment are simple in structure, convenient to operate, safe and reliable, and can be widely applied in battery piece production technology field.

[0039] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used to help understand the method and core idea of the utility model;Meanwhile, for those skilled in the art, according to the idea of the utility model, specific implementation mode and application range will be changed.The above description should not be understood as limiting the utility model.

Claims

1. A gas ionization mechanism, characterized by, It comprises: a ventilation cavity (1), a first electrode plate (2), a second electrode plate (3), and a power supply, the first side of the ventilation cavity (1) is connected with a gas supply unit, the gas supply unit provides gas to the inside of the ventilation cavity (1), the second side of the ventilation cavity (1) is provided with a discharge port, the first electrode plate (2) and the second electrode plate (3) are parallel to the second side of the ventilation cavity (1) and are respectively connected with two different electrodes of the power supply.

2. The gas ionization mechanism of claim 1, wherein, The first side and the second side of the ventilation cavity (1) are opposite sides, the second electrode plate (3) is directly connected to the outside of the second side of the ventilation cavity (1), the first electrode plate (2) is indirectly connected to one side of the second electrode plate (3) away from the ventilation cavity (1), the second electrode plate (3) is provided with a plurality of second ventilation holes, and the first electrode plate (2) is provided with a plurality of first ventilation holes.

3. The gas ionization mechanism of claim 2, wherein, The number of the first ventilation holes is greater than the number of the second ventilation holes, and the diameter of the second ventilation holes is greater than the diameter of the first ventilation holes.

4. The gas ionization mechanism of claim 1, wherein, It also comprises a cover plate (5) connected to the outside of the first side of the ventilation cavity (1), the first side of the ventilation cavity (1) is provided with an airway (11), and the airway (11) is provided with two or more than two air inlet holes communicating with the inside of the ventilation cavity (1).

5. The gas ionization mechanism of claim 1, wherein, The first electrode plate (2) is connected with the ventilation cavity (1) through an insulating column (4).

6. The gas ionization mechanism of claim 1, wherein, The first electrode plate (2) is connected with the negative electrode of the power supply, and the second electrode plate (3) is connected with the positive electrode of the power supply.

7. The gas ionization mechanism of claim 1, wherein, It also comprises a microwave generator (7) penetratingly connected with the third side of the ventilation cavity (1), the ventilation cavity (1) is provided with a coil (6), and the microwave generator (7) is opposite to the coil (6).

8. A coating apparatus, characterized by, It comprises a shell, an evaporation mechanism, and the gas ionization mechanism according to any one of claims 1-7, the gas ionization mechanism is detachably connected with the shell through a flange (8), the inside of the shell is used for placing a battery piece to be plated, the gas ionization mechanism and the evaporation mechanism are both arranged in the inside of the shell and below the battery piece in the shell, the gas ionization mechanism is used for ionizing hydrogen into hydrogen ions, and the evaporation mechanism is used for vaporizing solid aluminum oxide into aluminum oxide molecules.

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