阅读说明：本技术 一种改善多晶及类单晶光衰的氢钝化提效装置及其方法 (Hydrogen passivation effect improving device and method for improving light attenuation of polycrystal and monocrystal-like light ) 是由 张伟 郭海志 贾慧君 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种改善多晶及类单晶光衰的氢钝化提效装置及其方法,该装置包括：电池片组、导电隔板、直流电源、通风板、通气孔和温度探测器；所述电池片组至少包括一片多晶或类单晶电池片,所述导电隔板设置在所述电池片组的上下两端,所述直流电源与所述电池片组电连接,且所述电池片组的两侧安装有通风板,所述通风板的上表面上设置有通风口,所述通风板的底部平面上均匀设置有通气孔,所述通风口与所述通气孔相通。本发明通过提高电池片表面的温度来进一步改善电池片的光衰现象,有效延长电池片的使用寿命。(The invention discloses a hydrogen passivation effect-improving device and method for improving light attenuation of polycrystal and monocrystal-like crystals, wherein the device comprises: the battery pack, the conductive partition plate, the direct-current power supply, the ventilation plate, the vent hole and the temperature detector are arranged on the battery pack; the battery piece group includes a slice polycrystal or quasi-single crystal battery piece at least, electrically conductive partition plate sets up the upper and lower both ends of battery piece group, DC power supply with the battery piece group electricity is connected, just the ventilation board is installed to the both sides of battery piece group, be provided with the vent on the upper surface of ventilation board, evenly be provided with the air vent on the bottom plane of ventilation board, the vent with the air vent communicates with each other. The invention further improves the light decay phenomenon of the battery piece by increasing the temperature of the surface of the battery piece, and effectively prolongs the service life of the battery piece.)

1. A hydrogen passivation effect-improving device for improving light attenuation of polycrystal and monocrystal-like light is characterized by comprising: the battery pack comprises a battery piece group (2), a conductive partition plate (3), a direct current power supply (1) and an external temperature control system;

the external temperature control system comprises a ventilation plate (5), a ventilation hole (6) and a temperature detector (4);

the battery pack (2) at least comprises a polycrystalline or single-crystal-like battery piece, the conductive partition plate (3) is arranged at the upper end and the lower end of the battery pack (2), the direct-current power supply (1) is electrically connected with the battery pack (2), the ventilating plates (5) are arranged on two sides of the battery pack (2), the upper surface of each ventilating plate (5) is provided with a ventilating opening (7), the bottom plane of each ventilating plate (5) is uniformly provided with a ventilating hole (6), each ventilating opening (7) is communicated with the ventilating hole (6), the temperature detector (4) is vertically inserted into the ventilating plate (5), the temperature detector (4) is not in contact with the battery pack (2), and the ventilating hole (6) is externally connected with a gas flowmeter to control the air inflow.

2. The device for improving the light decay of polycrystalline and mono-like solar cells according to claim 1, wherein the cell stack (2) is formed by stacking polycrystalline or mono-like solar cells.

3. The hydrogen passivation effect-enhancing device for improving the light decay of polycrystal and monocrystal-like substances according to claim 1, wherein the conductive partition plate (3) is an aluminum plate, a copper plate or a steel plate.

4. The hydrogen passivation effect improving device for improving the light attenuation of polycrystal and monocrystal-like light as claimed in claim 1, wherein the temperature detector (4) comprises at least two non-contact thermocouples uniformly distributed on both sides of the battery piece, and the detection ends of the non-contact thermocouples are close to the battery piece.

5. The hydrogen passivation effect improving device for improving the light attenuation of polycrystal and monocrystal-like substances according to claim 1, wherein 5-20 vent holes (6) are uniformly distributed on the bottom plane of the vent plate (5).

6. A hydrogen passivation effect-improving method for improving light attenuation of polycrystal and monocrystal-like light is characterized by comprising the following steps:

s1: stacking the polycrystal battery pieces and the single crystal-like battery pieces into a battery piece group (2), wherein main grids of the battery pieces are arranged in the same direction or in a crossed manner;

s2: respectively connecting the positive electrode and the negative electrode of a direct current power supply (1) with the positive electrode and the negative electrode of the battery piece group (2), applying a forward current of 5-12A to the battery piece group (2), and controlling the temperature by an external temperature control system at 120-180 ℃ for 10-20 min;

s3: after S2 is finished, applying forward current of 10-18A to the battery piece group (2), and controlling the temperature of an external temperature control system at 200-310 ℃ for 30-60 min;

s4: after S3 is finished, applying forward current of 6-13A to the battery piece group (2), and controlling the temperature of an external temperature control system at 180-260 ℃ for 20-30 min;

s5: and (S4) stopping electrifying, and blowing air to the cell stack (2) through the vent holes (6) on the vent plate to reduce the temperature of the cell stack (2) to room temperature.

7. The hydrogen passivation effect improving device for improving the light attenuation of polycrystal and monocrystal-like light as claimed in claim 6, wherein the temperature detector (4) is used for detecting the temperature of the cell group (2).

Technical Field

The invention relates to the technical field of improving light attenuation of polycrystal and monocrystal-like crystals, in particular to a hydrogen passivation effect-improving device and method for improving light attenuation of polycrystal and monocrystal-like crystals.

Background

Under the condition of increasingly intense market competition, each plate of the photovoltaic industry chain implements the descending scheme. At present, most of polycrystalline silicon factories are changed from the original high-efficiency polycrystalline route to the high-efficiency polycrystalline route, the selling price of single silicon wafers is reduced by 0.1 yuan, and the cost pressure of the silicon factories and battery factories is greatly reduced. However, the light decay problem of the polycrystalline medium-effect silicon chip is obvious due to the adjustment of materials and processes, and the light decay of the medium-effect silicon chip can reach 1.5-2.5% and exceeds the previous polycrystalline standard. The same mono-like crystals are also widely paid attention to due to cost advantages, and a plurality of battery factories are mass-produced at present. The light decay of the quasi-single crystal is far beyond the conventional polycrystal, and the light decay reaches 3-5%.

Therefore, it is an urgent need to solve the above-mentioned problems by those skilled in the art to provide a hydrogen passivation effect-enhancing device and method capable of improving the light attenuation of polycrystalline and single-crystal-like materials.

Disclosure of Invention

In view of the above, the present invention provides a hydrogen passivation effect-enhancing device and method for improving light attenuation of polycrystal and single-crystal like materials, and aims to further improve the light attenuation phenomenon of a battery piece and prolong the service life of the battery piece by increasing the temperature of the surface of the battery piece.

In order to achieve the purpose, the invention adopts the following technical scheme:

a hydrogen passivation effect-enhancing device for improving light attenuation of polycrystal and monocrystal-like light comprises: the battery pack, the conductive partition plate, the direct-current power supply and the external temperature control system are arranged on the battery pack;

the external temperature control system comprises a ventilation plate, a vent hole and a temperature detector;

the battery piece group includes a polycrystal or single crystal-like battery piece at least, electrically conductive partition plate sets up the upper and lower both ends of battery piece group, DC power supply with battery piece group electricity is connected, just ventilation board is installed to the both sides of battery piece group, be provided with the vent on the upper surface of ventilation board, evenly be provided with the air vent on the bottom plane of ventilation board, the vent with the air vent communicates with each other, a gas flowmeter of air vent external connection, control air inlet flow, temperature probe inserts the ventilation board perpendicularly, just temperature probe does not contact with battery piece group.

Preferably, the cell stack is formed by stacking polycrystalline or single-crystal-like cell sheets.

Preferably, the conductive separator is an aluminum plate, a copper plate or a steel plate.

Preferably, the temperature detector comprises at least two non-contact thermocouples uniformly distributed on both sides of the battery piece, and the detection ends of the non-contact thermocouples are close to the battery piece.

Preferably, 5-20 vent holes are uniformly distributed on the bottom plane of the vent plate.

A hydrogen passivation effect-improving method for improving light attenuation of polycrystal and monocrystal-like light comprises the following steps:

s1: stacking the polycrystal battery pieces and the single crystal-like battery pieces into a battery piece group, wherein the main grids of the battery pieces are arranged in the same direction or in a crossed manner;

s2: respectively connecting the positive electrode and the negative electrode of a direct current power supply with the positive electrode and the negative electrode of the battery piece group, applying a forward current of 5-12A to the battery piece group, keeping the battery temperature of 120-180 ℃ in the stabilization period of an external temperature control system for 10-20 min;

s3: after S2 is finished, applying forward current of 10-18A to the battery piece set, and controlling the temperature of an external temperature control system at 200-310 ℃ for 30-60 min;

s4: after S3 is finished, applying forward current of 6-13A to the battery piece set, and controlling the temperature of an external temperature control system at 180-260 ℃ for 20-30 min;

s5: and S4, stopping electrifying, and blowing air to the cell stack through the vent holes on the vent plate to reduce the temperature of the cell stack to room temperature.

Preferably, the temperature detector detects the temperature of the battery plate group.

According to the technical scheme, compared with the prior art, the hydrogen passivation effect improving device and the method thereof for improving the light attenuation of the polycrystal and the monocrystal-like light attenuation are provided, wherein the device is simple in structure, and the temperature is fed back by the temperature detector and is based on the temperatureAdjusting size of intake flowmeterThe method controls the air inlet flow to achieve the purpose of adjusting the temperature, and converts positive hydrogen ions in an SiN H film layer to uncharged hydrogen ions by increasing the surface temperature of a cell on the basis of the device, so that the hydrogen ions can be compounded with positively charged boron-oxygen pairs, and the compound is realizedThe four-membered ring boron-oxygen pair structure with high combination property is converted into an open ring structure with low activity, BO composite centers are reduced, the minority carrier lifetime can be prolonged while the light decay of polycrystal and quasi-monocrystal can be improved, and the efficiency of the battery piece can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of the structure provided by the present invention;

1-direct current power supply, 2-battery piece group, 3-conductive partition plate, 4-temperature detector, 5-ventilating plate, 6-ventilating hole and 7-ventilating hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.