592results about How to "Reduce Fragmentation Rate" patented technology

An automatic series welding machine capable for photovoltaic crystalline silicon cell pieces with radians is composed of a welding strip supply system, a loading system, a conveying system, a discharging system and a control system; the welding strip supply system comprises a welding strip feeding mechanism, a welding strip processing mechanism, a welding strip traction mechanism and a welding strip pressing mechanism; the loading system comprises a rotary loading mechanism, a jacking mechanism, a high-speed robot and a CCD detection system; the conveying system comprises a conveying mechanism, a tensioning mechanism and a welding mechanism; the discharging system comprises a cell string turnover mechanism, a cell string transferring mechanism and a drawer type discharging mechanism; the control system comprises a cantilever type touch screen computer, a Mitsubishi PLC, a circuit system and a gas path system. According to the actual measurement, the machine can weld the cell pieces with the length of 120 micrometers to 200 micrometers, the highest production efficiency can reach 800 pieces/hour, the breakage rate is smaller than 0.3 percent, and the length precision of a cell string can reach +/- 1 mm.

The invention discloses a single welding and series welding integrity device of solar cell slices. The provided single welding and series welding integrity device of the solar cell slices is good in positioning accuracy and compatible in the solar cell slices with different specifications, and can improve the single welding and series welding production efficiency of the solar cell slices. The device comprises a device rack, the device rack is provided with a feed mechanism, a transmission and positioning mechanism, a welding and temperature control mechanism, a blanking mechanism, a control mechanism and a power supply and control mechanism. According to the single welding and series welding integrity device of the solar cell slices, a full manual welding mode is replaced by a full automatic mechanical welding mode, the production efficiency is remarkably increased, the cell slice failure rate during a welding process is reduced, and the device is suitable for cell slice welding of the solar cells.

The invention provides organic adhesive for the aluminum paste of silicon solar cells and a preparation method thereof. The organic adhesive comprises the following components by the weight part: 23% of ethyl cellulose, 1% to 5% of cellulose acetate butyrate, 88% to 94% of organic solvent, 0.2% to 1% of wetting dispersant and 1% to 3% of defoamer with the total amount being 100%. The preparation method comprises the following steps: putting the components into a reaction kettle; heating the components up to the temperature of 120 to 140 DEG C while stirring at the speed of 60 to 80 RPM and holding at a constant temperature for 2 to 4 hours to ensure that the components in the reaction kettle can be evenly stirred and subjected to complete reaction; and cooling the reactant and filtering the reactant with mesh to obtain the final product of the organic adhesive. The aluminum paste prepared from the organic adhesive has the advantages that the dispersibility or the suspensibility thereof is high, the aluminum paste does not laminate or precipitate after long-time storage and the aluminum paste can be uniformly coated so that the solid powder in the dried aluminum powder has the advantages of high adhesive strength and low stress generated on silicon chips.

The invention discloses coating equipment for tube-type PERC solar cells. The coating equipment comprises a wafer loading region, a furnace body, a gas cabinet, a vacuum system, a heating system, a control system and a graphite boat; the gas cabinet is provided with a first gas pipeline for introducing silane, a second gas pipeline for introducing ammonia, a third gas pipeline for introducing trimethylaluminum, a fourth gas pipeline for introducing laughing gas and a fifth gas pipeline for introducing methane; the graphite boat is used for loading or unloading a silicon wafer; before being used or after being coated many times, the graphite boat needs to be subjected to pretreatment comprising the steps: drying the graphite boat; and coating at least one layer of silicon carbide film on the surface of the dried graphite boat. Correspondingly, the invention further discloses a coating method for tube-type PERC solar cells. By using the coating equipment and method, the pretreatment step of the graphite boat is simplified, the consumption of the silicon wafer is reduced, the silicon wafer is prevented from being scratched, and the EL yield of the cells is increased.

The invention discloses solar silicon wafer two-in-one automatic loading and unloading equipment, which is characterized in that a loading module and an unloading module are respectively located at two sides of a lifting platform, a transferring module is arranged above a discharging port of the loading module and a feeding port of the unloading module, the lifting platform is butted with a feeding and discharging end of main equipment along a Y moving direction of a carrier plate, the discharging port of the loading module and the feeding port of the unloading module respectively correspond to two sides in the X-direction of the feeding and discharging end of the main equipment; the lifting platform comprises an upper discharging station and a lower feeding station, the upper discharging station is butted with the discharging port above the feeding and discharging end of the main equipment in the Y-direction, and the lower feeding station is butted with the feeding port below the feeding and discharging end of the main equipment in the Y-direction; the unloading module comprises CCD detection module, an eliminating device and a lamination structure; and the lamination structure enables dropped silicon wafers to be neatly stacked by using a principle of automatic positioning of an oblique plane, thereby enabling the silicon wafer to be directly stacked into a block shape so as to be convenient for being directly packaged and transported, and greatly improving the product packaging efficiency.

The present invention relates to tobacco pre-treatment, and is especially sectional tobacco thrashing and redrying pre-treatment process. The tobacco pre-treatment process includes the following steps: spreading the vacuum dampened tobacco leaf; cutting tobacco leaf into three sections including leaf stem, leaf base and leaf tip; moistening the leaf stem and separating in a leaf stem returning device into tobacco leaf stem and inferior tobacco leaf; and sieving leaf base to eliminate sand, moistening and multi-stage separating to obtain tobacco leaf stem and tobacco leaf. The tobacco pre-treatment process has high product quality.

The invention discloses front and back surface electrodes of a screen printing crystalline silicon solar cell and a manufacturing method thereof; array points which are not printed into conductive paste are manufactured in an electrode main gate line; and the graphics of each array point is in a closed type. The manufacturing method comprises the step of arranging latex film array points on the screen printing plate electrode main gate line for blocking the conductive paste. The positive and back surface electrodes of the screen printing crystalline silicon solar cell and the manufacturing method thereof can effectively save the conductive paste on the positive and back surfaces of the crystalline silicon solar cell, and effectively eliminate the stress caused by different expansion coefficients of silver silicon alloy and silicon, thereby reducing the bending rate of a cell film and the welding debris rate of a component; the invention can enhance the adhesion firmness of the main gate line conductive paste on the silicon surface after being sintered and effectively solve the falling-off problem of a silver main gate line; and the invention reduces the surface contact area of the conductive paste and the silicon, and increases the open-circuit voltage and the short-circuit current.

The invention relates to a method for mixed utilization of a solid state disk (SSD) and a shingled magnetic recording (SMR) hard disk in a disk file system. The method is characterized by comprising the following steps of: establishing an SMR hard disk description list in the SSD hard disk so as to form a mapping relationship between the SSD hard disk and the SMR hard disk; allocating data blocks to to-be-written data by the file system; writing the allocated data into the SSD hard disk and the SMR hard disk separately by the file system according to a data block allocation result; and updating affair group information of the SMR hard disk description list, thereby finishing a data writing cycle. According to the method, the data of the file system are divided into a part that frequently needs to be modified and a data part, the SSD hard disk is used for storing the frequently-changed part, such as metadata, so as to improve the access efficiency; and the SMR hard disk is used for storing the data blocks of a file, and because the SSD hard disk stores most random modifications, the fragment rate of the system is greatly reduced and the storage efficiency and performance are improved.

The invention discloses a solar cell sheet electric sheet-splitting device. The solar cell sheet electric sheet-splitting device comprises a rack, a left sheet-splitting plate, a right sheet-splitting plate, connecting pull rods which are in slide fit with the rack, and a cam driving mechanism which drives the connecting pull rods to perform vertical reciprocating linear motion on the rack; one end of the left sheet-splitting plate is in slide fit with one side of the rack; one end of the right sheet-splitting plate is in slide fit with the other end of the rack; and the other end of the left sheet-splitting plate, the other end of the right sheet-splitting plate and one end of each connecting pull rod are hinged together. With the solar cell sheet electric sheet-splitting device of the invention adopted, the standardization and automation of solar cell sheet splitting can be realized, and randomness and errors caused by human can be eliminated, and sheet-splitting efficiency and sheet-splitting qualified rate can be improved.

The invention relates to monocrystalline silicon wafer precleaning liquid and a cleaning method thereof. The invention is characterized in that the precleaning liquid comprises the following compositions: hydrogen peroxide, sodium hydroxide or potassium hydroxide, and water. The cleaning method of the monocrystalline silicon wafer precleaning liquid as in claim 1 is characterized in that the method comprises the following steps: putting a silicon wafer inserted into a flower basket into a uniformly mixed monocrystalline silicon wafer precleaning liquid at a temperature of 55-80 DEG C, performing ultrasonic cleaning for 60-600 seconds, after ultrasonic cleaning, rinsing with deionized water at 60 DEG C for 1 min, after deionized water rinsing, taking the silicon wafer out, and drying. The advantages of the invention are that with the hydrogen peroxide process, the alkali concentration is reduced; the hydrogen generation amount is low; no bubble trace is generated on the silicon wafer surface; no basket rinsing is caused; no obvious boundary is generated. Since the alkali concentration is reduced, the thickness reduction amount is effectively decreased, which facilitates the reduction of the fragment rate of battery pieces in subsequent procedures.

A frosting liquid used in a production line of frosted glass includes following components, by weight, 5-10 parts of ammonium fluoride, 5-10 parts of inorganic acid, 5-10 parts of organic acid, 5-10 parts of inorganic salt, 3-5 parts of solid dispersed particles, 0.2-0.3 parts of a surfactant, 0.2-0.3 parts of a dispersing agent and 76.6-80 parts of water. The frosting liquid can enhance the strength of frosted glass and reduce fragment rate.

The invention discloses a ring removing method of a Taiko thinning process. The method includes: using the Taiko thinning process to thin the back of a wafer; completing a back process at the back of the wafer; attaching the wafer to a cutting rubber belt and fixing the same on a wafer ring; cutting at a position 2-10mm away from the inner side of the outer edge of the middle part of the wafer to form a buffer groove; using a ring cutting process to remove or flatly grind a support ring. By the method, wafer breaking rate during ring cutting can be lowered or wafer breaking during ring cutting can be prevented completely.

The invention discloses a black heterogeneous crystalline cell which sequentially comprises a first metal electrode, a first conductive film, a P-shaped amorphous silicon layer, a first intrinsic amorphous silicon layer, a silicon wafer, a second intrinsic amorphous silicon layer, an N-shaped amorphous silicon layer, a second conductive film and a second metal electrode. The first conductive film and the second conductive film are polycrystalline boron-doped ZnO films. The manufacture method comprises the steps of preprocessing the surface of the silicon wafer; depositing intrinsic amorphous silicon layer plating in a double-faced mode; depositing the P-shaped amorphous silicon layer from the front side, and depositing the N-shaped amorphous silicon layer from the back side; and growing the ZnO films on the front side and the back side of a cell piece and screen printing metal grid lines on the front sides and the back sides of the conductive films. The polished silicon wafer with the smooth surface is adopted, and light trapping is achieved through pyramid structures of the ZnO films, so that a light trapping structure and surface passivation of the cell can be achieved maximally and respectively, and photoelectric converting efficiency of the cell is improved.

The invention relates to a magnetron sputtering coating system, comprising a linearly arranged slice entering chamber, a first buffer chamber, a first transition chamber, a sputtering coating chamber, a second transition chamber, a second buffer chamber and a slice discharging chamber, wherein the sputtering coating chamber comprises a first direct current sputtering chamber, a second direct current sputtering chamber, a third direct current sputtering chamber and a fourth direct current sputtering chamber which are connected successively. The first direct current sputtering chamber is connected to the first transition chamber; the fourth direct current sputtering chamber is connected to the second transition chamber; the first direct current sputtering chamber is provided with two first cathode targets; the second direct current sputtering chamber is provided with two second cathode targets; the third direct current sputtering chamber is provided with two third cathode targets; and the fourth direct current sputtering chamber is provided with two fourth cathode targets. By using the magnetron sputtering coating system for coating, fragment rate can be effectively reduced; coating of the film with relatively low sheet resistance can be facilitated; process requirements of on-cell coating are met; and production yield is increased.

The invention discloses an annular cutting process method of a Taiko thinning process. The annular cutting process method comprises the following steps of thinning the back surface of a wafer by the Taiko thinning process method; completing a back surface process on the back surface of the wafer; and attaching the wafer onto a cutting adhesive tape and fixing the wafer on a scribing ring. The annular cutting process comprises the following steps of cutting an edge of an outer side at the middle part of the wafer; and cutting a ring taking arm to be between the cutting adhesive tape and a support ring by a successive approximation mode in multiple times. By the annular cutting process, the debris rate in the annular cutting step can be reduced.

The invention discloses a distributed digital signage advertisement delivery method based on a Storm platform. The advertisement delivery method comprises the steps that: 1) a processing framework based on the Storm platform is established, wherein the processing framework includes order reading, screen selecting, scheduling and order state updating; 2) an emission source receives order messages and sends the order messages to a screen selection processing unit; 3) the screen selection processing unit selects a screen position for each order according to constraint conditions such as order geographical location; 4) a scheduling processing unit generates a scheduling list of the screen position according to a time constraint condition in the order and screen position idle time periods; 5) and a state processing unit updates the order state according to the scheduling results. The distributed digital signage advertisement delivery method can achieve instant and precise delivery of mass order advertisements efficiently, can increase screen position utilization rate of the digital signage, reduces time fragments, and has very high commercial value as well as application and popularization value.

The invention discloses a feeding system for silicon chip quality sorting equipment. The feeding system mainly comprises multiple feeding units with the same structure. Each one of the feeding units comprises a vertical guide rail, the vertical guide rail is provided with a feeding box, a basket case is installed in the feeding box, a side of the vertical guide rail is provided with a horizontal transmission mechanism, the horizontal transmission mechanism is used for transmitting silicon chips in the basket case to a downstream station, an output end of the horizontal transmission mechanism is provided with a horizontal guide rail, and the multiple horizontal transmission mechanisms can horizontally move reciprocatingly so that butt joint of the corresponding horizontal transmission mechanism and the downstream station is switched and thus when the feeding box in the multiple feeding units carries out feeding, the rest of the feeding boxes carry out loading. The multiple feeding units are installed on the horizontal guide rail capable of horizontally moving so that left-to-right switching of the multiple feeding units is realized. When one of the feeding units carries out a feeding process, the rest of the feeding units carry out basket case loading so that uninterrupted feeding is realized.

The invention provides a bending piece detection device for a battery piece testing procedure. By the device, a fragmentation ratio of the testing procedure can be obviously reduced, and automatic degree of detecting the bending piece can be improved. The bending piece detection device comprises a photoelectric sensor and an indicator, wherein the photoelectric sensor is arranged at the side of a transmission belt and is used for detecting bending pieces existing on the transmission belt; and the indicator is in signal connection with the photoelectric sensor and can send an indication signal indicating that the bending pieces exist on the transmission belt to an operator. The photoelectric sensor detects whether the bending pieces exist on the transmission belt through a photoelectric path; and if the bending pieces are detected, a detection signal is transmitted to the indicator, and the indicator sends the indication signal indicating that the bending pieces exist on the transmission belt so as to alarm the operator to take out the bending pieces, so that the bending pieces are automatically detected. The operator only needs to take out the bending pieces; the fussy processes of manually picking up the bending pieces in the prior art are avoided; the detection precision is improved; and the labor cost is saved.

The invention relates to a wafer transfer method and device. The method comprises the following steps of: detecting whether a wafer deviates from a designated position; and stopping transferring the wafer when the wafer deviates from the designated position. According to the invention, before the wafer is transferred, whether the wafer deviates from the designated position is detected, and when the wafer deviates from the designated position, a wafer storing and lifting device is stopped transferring the wafer, thereby avoiding the problem of wafer fragment because the wafer deviating from the designated position is continued to be transferred, further improving the stability and safety of wafer transfer, reducing the fragment percent and greatly saving cost.

The invention discloses a grinding device for sapphire wafers. The grinding device for sapphire wafers comprises a pulp stock barrel, a peristaltic pump and a grinder, wherein a pulp stock trough is arranged on the grinder, and pulp stock enters into the grinder through the peristaltic pump and the pulp stock trough. The grinding method for the sapphire wafers comprises the following steps: 1, preparing the pulp stock: putting in raw materials by levels and layers; 2, controlling pulp stock flows: putting pulp stock accurately; 3, correcting the flatness of the surface of a grinding lower plate: repeatedly measuring by using a long gauge, a short gauge and a dial gauge, and correcting; 4, distributing powder on the surface of a grinding plate; and 5, grinding both sides of each wafer: firstly carrying out light pressing grinding. The grinding method provided by the invention is characterized in that raw material ratio of the pulp stock is optimized, the pulp stock supplying flow is more accurate, the conveying is more even, before normal grinding, light pressing grinding is performed firstly, the problem of wafer breakage during a grinding process can be prevented for the greatest possible, the wafer breakage rate is lowered, the merit factor of grinding is improved, the removing rate during grinding is stable, the problems of over grinding and low removing rate cannot be caused, and the efficiency is relatively high.

The invention discloses a back-contact solar cell module. The back-contact solar cell module comprises a first cell, a second cell and a third cell which are connected in series and are adjacent, the back surface of each cell is provided with at least one group of back electrode array and at least one group of hole metal electrode array, the number of the back electrode array on each cell is equal to that of the hole metal electrode array, the electrode distribution structures of adjacent cells are the same, the hole metal electrode array of the first cell is directly connected with the back electrode array on the second cell which is adjacent to the first cell through a flow guidance piece in a broken line or curve way, and the hole metal electrode array of the second cell is directly connected with the back electrode array on the third cell which is adjacent to the second cell through the flow guidance piece in the broken line or curve way. According to the back-contact solar cell module disclosed by the invention, a confluence piece adopted by the traditional back-contact cell in interconnection is omitted, not only is a series welding step omitted and is the welding work amount greatly reduced, but also the electric performance and the total power of the back-contact solar cell module are increased, and the back-contact solar cell module has unexpected technical effect.

The invention relates to a manufacturing technique of a chip for a two-way voltage regulator diode DB3, wherein the two-way voltage regulator diode DB3 is a symmetrical diode with the structure of N<+> PN<+>. The resilience voltage is increased due to the adoption of a triple photolithographic process, the trigger capacity of the two-way voltage regulator diode is improved; due to the application of shallow mesa or trench etching, the fragmentation rate is reduced; and glass is passivated due to the adoption of an electrophoretic process, the withstand voltage stability and reliability of the two-way voltage regulator diode are improved. The manufacture technique of the chip for the two-way voltage regulator diode has the advantages of improving the breakdown voltage stability of the two-way voltage regulator diode DB3, enhancing the trigger capacity of the diode, reducing the high-temperature power consumption, prolonging the service life of the diode, and simultaneously improving the qualification rate.