A passivation device and loading structure

Abstract

The invention discloses a passivation device and a loading structure, comprising an isolation box, a passivation box located in the isolation box, and a carrier device and a heating device located inside the passivation box. The carrier device carries sliced ​​batteries, the heating device controls the temperature in the passivation box, a spray device is arranged between the carrier device and the heating device, the spray device sprays oxygen or sprays passivation gas on the cross section of the sliced ​​batteries, and also comprises an ultraviolet lamp tube, the ultraviolet rays of the ultraviolet lamp tube react the oxygen sprayed into the spray device into ozone, and the ozone contacts the cross section of the sliced ​​batteries for passivation treatment. The invention adopts a technical solution of spraying ozone on the cross section of the sliced ​​batteries by the spray device for passivation treatment, which is simple to operate and can form industrialized and large-scale development. The invention can passivate the cross section of the sliced ​​batteries by the ozone generated by the ultraviolet lamp tube, and the ozone generation method is diverse.

Description

Technical Field

[0001] The invention belongs to the field of semiconductor manufacturing and solar photovoltaic cell manufacturing, and in particular to a post-cutting processing procedure of photovoltaic cell sheets. Background Art

[0002] In recent years, photovoltaic technology has developed rapidly and its application scope has been wide. The market has shifted from focusing only on high power to a comprehensive requirement of high power, high power generation under any installation conditions, low attenuation and low cost, thereby further reducing the cost per kilowatt-hour. Therefore, how to reduce the cost per kilowatt-hour has become the core issue of the industry. As the core component of photovoltaic system power generation, photovoltaic modules are the top priority. High-power modules are the most direct and advantageous technical channel to promote "grid parity". The power of modules is mainly improved through technologies such as bifacial, half-cut, multi-busbar and shingled.

[0003] To date, cutting in half has been proven to be compatible with a variety of module power enhancement technologies and has achieved good results. The advantages of half-cell batteries are: the current loss of the entire module is reduced to 1 / 4 of the original, and the output power is about 5 to 10W higher than the same type of whole-cell module; it can effectively reduce the hot spot effect of the module; the temperature of the half-cell module itself is lower than that of the conventional whole-cell module; the half-cell module meets the 1500V system voltage design requirements and can reduce the system cost by about 10%; it effectively reduces the loss of power generation caused by shading; reduces light-induced degradation, etc.

[0004] However, a small defect of the half-cut module is that after the cell is cut in half, the silicon wafer cross section is damaged and contaminated, resulting in a decrease in the fill factor FF and short-circuit current Isc of the cell, thereby reducing the efficiency of the cell, reducing the efficiency of the module, and reducing the improvement effect of the half-cut module. The present invention effectively solves this problem. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a passivation device and a loading structure.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a passivation device and loading structure, characterized in that: it includes an isolation box, a passivation box located in the isolation box, and a carrier device and a heating device located inside the passivation box, the carrier device carries the sliced ​​battery, the heating device controls the temperature in the passivation box, a spray device is provided between the carrier device and the heating device, the spray device sprays oxygen or sprays passivation gas on the cross-section of the sliced ​​battery, and also includes an ultraviolet lamp tube, the ultraviolet light of the ultraviolet lamp tube reacts the oxygen sprayed by the spray device into ozone, and the ozone contacts the cross-section of the sliced ​​battery for passivation treatment, the isolation box includes an isolation body and an isolation cover plate, the isolation body includes an isolation cavity, the passivation box is located in the isolation cavity, the upper end face of the isolation body is provided with a sealing ring, the isolation body is provided with a ventilation pipe and a thermocouple, the ventilation pipe is connected to the isolation cavity, and the ventilation pipe is passed into the passivation gas. The isolation cavity is purged with protective gas or compressed air, and the thermocouple extends into the passivation box to measure the temperature in the passivation box. The passivation box also includes a cover plate and a loading structure for loading a carrier device and a heating device. The loading structure includes a loading bottom plate, a loading connecting plate, a loading partition and two groups of loading side plates. The two groups of loading side plates are symmetrically arranged and fixedly connected to the loading bottom plate and the loading connecting plate. The loading partition is fixedly connected to the two groups of loading side plates. Through the loading partition, the loading structure forms a carrier cavity for loading the carrier device and a heating cavity for loading the heating device. The two groups of loading side plates are respectively fixed with avoidance positions located in the heating cavity. Adjustment grooves are symmetrically fixed on both sides of the avoidance positions of the loading side plates. Fixing parts are arranged in the adjusting grooves. The heating device is installed in the heating cavity through the fixing parts. At the same time, the distance between the heating device in the heating cavity and the loading partition is adjusted by adjusting the position of the fixing parts in the adjusting grooves.

[0007] Furthermore, a reaction window is fixedly provided on the loading partition, the heating device is connected to the carrier device through the reaction window, the passivation gas flows through the reaction window into the carrier cavity to passivate the cross section of the sliced ​​battery, the loading connecting plate is connected with a diffusion piece, a plurality of groups of diffusion holes are fixedly provided on the diffusion piece, an air intake pipe is connected on the loading connecting plate, the air intake pipe passes through the isolation body and extends outward, the air intake pipe passes nitrogen to the carrier device and the carrier cavity, and the diffusion holes of the diffusion piece control the diffusion uniformity of the nitrogen passed into the air intake pipe.

[0008] Furthermore; the carrier device includes a carrier rear plate, a carrier left plate, a carrier right plate, a carrier bottom plate and a carrier upper plate, the carrier bottom plate is used to support the sliced ​​battery, the cross-section of the sliced ​​battery faces the reaction window, the carrier rear plate, the carrier left plate and the carrier right plate are all installed on the carrier bottom plate, the carrier left plate and the carrier right plate are symmetrically distributed, the carrier rear plate, the carrier left plate, the carrier right plate and the carrier bottom plate form a carrying cavity for carrying the sliced ​​battery, the carrier upper plate and the carrier bottom plate limit the movement of the sliced ​​battery in the vertical direction, and the carrier left plate and the carrier right plate limit the movement of the sliced ​​battery in the horizontal direction.

[0009] Furthermore, the heating device includes a shell and a heating tube. The heating tube adopts an infrared lamp tube or an electric furnace wire. The heating tube is fixed to the shell through a fixing rod. The sides of the shell are respectively provided with fixing holes. The fixing parts connect the heating device and the loading structure in turn through the fixing holes and the adjustment grooves.

[0010] Furthermore; the spray device includes an air duct and a spray pipe, the air duct and the spray pipe are connected, the air duct passes through the heating device and the isolation body and extends to the outside of the isolation box, a plurality of spray holes are fixed on the spray pipe, the spray pipe is opposite to the reaction window, the passivation gas is introduced through the air duct and sprayed onto the cross-section of the sliced ​​battery through the spray holes, and the protective gas is introduced into the air duct to purge the inside of the passivation box.

[0011] Furthermore; the spray device includes an air duct and a spray pipe, the air duct and the spray pipe are connected, the air duct passes through the heating device and the isolation body and extends to the outside of the isolation box, a plurality of spray holes are fixed on the spray pipe, the spray pipe is opposite to the reaction window, the passivation gas is introduced through the air duct and sprayed onto the cross-section of the sliced ​​battery through the spray holes, and the protective gas is introduced into the air duct to purge the inside of the passivation box.

[0012] Furthermore, the ultraviolet lamp tube is fixed on the shell of the heating device, the heating tube is located between the ultraviolet lamp tube and the carrier device, and the ultraviolet lamp tube and the heating tube are isolated by a heat-insulating lampshade.

[0013] In summary, the present invention is beneficial in that:

[0014] 1) The present invention adopts a spray device to spray ozone on the cross section of the sliced ​​battery for passivation treatment. The operation is simple and can form industrialization and large-scale development.

[0015] 2) The present invention controls the ozone concentration for passivation treatment to less than 2000ppm, the flow rate to 0.1slm-30slm, and the spraying time to 2min-60min, so as to ensure the formation of a dense silicon dioxide protective layer on the cross section of the sliced ​​battery, shorten the spraying cycle, improve the spraying efficiency, avoid ozone damage to the electrode and the surface coating, and further improve the photoelectric efficiency of the sliced ​​battery.

[0016] 3) The present invention can passivate the cross section of the sliced ​​battery by using ozone generated by an ultraviolet lamp, and the ozone generation method is various.

[0017] 4) The present invention introduces protective gas to protect the electrodes and surface coating of the sliced ​​battery, so that ozone only oxidizes the cross section, thereby improving the efficiency of the sliced ​​battery.

[0018] 5) The present invention uses a spray pipe of a spray device to spray the passivation gas onto the cross section of the sliced ​​battery, ensuring uniform spraying of the passivation gas and ensuring the passivation effect.

[0019] 6) The present invention effectively ensures the temperature of the passivation box by configuring the isolation box and the passivation box as an inner and outer box structure.

[0020] 7) The present invention provides a plurality of carrier limiting columns in the carrier cavity, which effectively improves the installation efficiency and stability of the carrier device after installation.

[0021] 8) The present invention is also provided with a diffusion member, and the protective gas introduced into the air inlet pipe is evenly diffused through the diffusion holes of the diffusion member, and the carrier device and the diffusion member are sealed by a sealing ring to ensure that the protective gas introduced into the air inlet pipe is complete and even.

[0022] 9) The distance between the left side plate and the right side plate of the carrier device of the present invention is adjustable, which is convenient for loading and unloading of sliced ​​batteries on the one hand, and can adapt to sliced ​​batteries of different sizes on the other hand, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a device according to Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the interior of an isolation box according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the interior of a passivation box according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the loading structure of Embodiment 1 of the present invention.

[0027] Figure 5 It is a schematic diagram of Embodiment 1 of the present invention.

[0028] Figure 6 Schematic diagram of a heating device according to an embodiment of the present invention.

[0029] Figure 7 Schematic diagram of a carrier device according to an embodiment of the present invention Figure 1 .

[0030] Figure 8 Schematic diagram of a carrier device according to an embodiment of the present invention Figure 2 .

[0031] Fig. 9 It is a schematic diagram of an exploded view of a carrier device according to an embodiment of the present invention.

[0032] Fig.10 This is a schematic diagram of the installation of the heating device and the ultraviolet lamp tube according to the second embodiment of the present invention.

[0033] Symbols in the figure: isolation box 1, isolation cover plate 11, isolation body 12, isolation cavity 121, cable interface 13, sealing ring 14, thermocouple 15, passivation box 2, loading structure 21, carrier device 22, heating device 23, dispersion member 24, cover plate 25, mounting plate 217, loading connecting plate 211, two sets of loading side plates 212, loading partition plate 213, loading bottom plate 214, carrier cavity 215, heating cavity 216, carrier limiting column 2151, avoidance position 2121, adjustment groove 2122, fixing part 2123, reaction window 2131, shell 231, heating tube 233, fixing rod 235, carrier rear plate 221 , the left side plate 223 of the carrier, the right side plate 224 of the carrier, the bottom plate 225 of the carrier, the upper plate 222 of the carrier, the first positioning cavity 2211, the second positioning cavity 2251, the side plate pressure block 227, the limiting groove 2253, the limiting block 2233, the positioning block 2234, the positioning rod 22342, the positioning plate 22341, the handle 2221, the buckle block 2222, the buckle cavity 2231, the pressure block 228, the ventilation cavity 2213, the sealing ring 2212, the ultraviolet lamp tube 232, the heat-insulating lampshade 234, the sliced ​​battery 3, the air guide pipe 41, the spray pipe 42, the air inlet pipe 43, the ventilation pipe 44, the exhaust pipe 52, the exhaust pipe 51, and the vacuum gauge 6. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] Embodiment 1:

[0038] like Figure 1-9As shown, a passivation device and a loading structure include an isolation box 1, a passivation box 2 located in the isolation box 1, and a carrier device 22 and a heating device 23 located inside the passivation box 2. A spray device is provided between the carrier device 22 and the heating device 23. The carrier device 22 carries the sliced ​​battery 3. The heating device 23 controls the temperature inside the passivation box 2. The spray device sprays passivation gas on the cross section of the sliced ​​battery 3.

[0039] In this embodiment, the passivation gas is set to be a mixed gas containing ozone, and the following description refers to ozone. In addition, the sliced ​​battery 3 has at least one cross section.

[0040] The isolation box 1 is set to a square structure, which includes an isolation body 12 and an isolation cover 11. The isolation body 12 includes an isolation cavity 121 with an opening facing upward. The passivation box 2 is located in the isolation cavity 121. The upper end surface of the isolation body 12 is provided with a sealing ring 14 to ensure the sealing of the isolation body 12 and the isolation cover 11. The isolation body 12 is provided with a cable interface 13, a vent pipe 44 and a thermocouple 15. The vent pipe 44 is connected to the isolation cavity 121. The vent pipe 44 is passed through a protective gas, such as nitrogen or compressed air, to purge the isolation cavity 121. The thermocouple 15 extends into the passivation box 2 to measure the temperature in the passivation box 2. In this embodiment, Figure 2 As shown, the cable interface 13 , the vent pipe 44 and the thermocouple 15 are located on the same side of the isolation box 1 .

[0041] The passivation box 2 also includes a loading structure 21 for loading a carrier device 22 and a heating device 23. In this embodiment, the fixed installation of the passivation box 2 and the isolation box 1 can be achieved by installing the loading structure 21 and the isolation box 1. A mounting plate 217 is provided on the side of the loading structure 21. The mounting plate 217 is configured as an L-shaped structure, which includes a horizontal forming surface and a vertical forming surface. The vertical forming surface of the mounting plate 217 is fixedly connected to the loading structure 21, and the horizontal forming surface of the mounting plate 217 is fixedly connected to the isolation body 12, so that the passivation box 2 is fixedly installed in the isolation box 1. The passivation box 2 also includes a cover plate 25 to reduce the leakage of gas in the passivation box 2 and to provide heat insulation with the isolation box 1.

[0042] The loading structure 21 includes a loading bottom plate 214, a loading connecting plate 211, a loading partition plate 213 and two groups of loading side plates 212. The two groups of loading side plates 212 are symmetrically arranged and fixedly connected to the loading bottom plate 214 and the loading connecting plate 211. The left and right sides of the loading partition plate 213 are respectively fixedly connected to the two groups of loading side plates 212. The lower end surface of the loading partition plate 213 is fixedly connected to the loading bottom plate 214. Figure 4 As shown, the loading structure 21 forms a loading cavity 215 for loading the loading device 22 and a heating cavity 216 for loading the heating device 23 through the loading partition 213. In this embodiment, the loading structure 21 can be integrally formed.

[0043] In order to improve the installation efficiency and stability of the carrier device 22 after installation, a plurality of carrier limiting columns 2151 are fixedly provided on the lower end surface of the carrier cavity 215. In this embodiment, the carrier limiting columns 2151 are provided in four groups and the four groups of carrier limiting columns 2151 are distributed in a rectangular shape, so that the carrier device 22 can be evenly and stably installed in the carrier cavity 215. The carrier limiting columns 2151 position the carrier device 22 during installation and limit the lateral movement of the carrier device 22, thereby further ensuring the stability of the installation of the carrier device 22. Preferably, the carrier limiting columns 2151 adopt a conical structure to facilitate the introduction of the carrier limiting columns 2151 into the carrier device 22, thereby improving the installation efficiency of the carrier device 22.

[0044] A diffuser 24 is fixedly disposed in the carrier cavity 215. Figure 5 As shown, the diffuser 24 is fixed on the loading connecting plate 211, and a plurality of evenly distributed diffusion holes (not marked in the figure) are fixed on the diffuser 24. An air inlet pipe 43 is connected to the loading connecting plate 211, and the air inlet pipe 43 passes through the isolation body 12 and extends outward. The air inlet pipe 43 passes a protective gas, such as nitrogen, to the carrier device 22 and the carrier cavity 215 to remove the air in the carrier device 22 and the carrier cavity 215, and protect the electrodes and surface coatings of the sliced ​​batteries 3. The diffusion holes of the diffuser 24 can evenly diffuse the protective gas passed through the air inlet pipe 43, and protect the upper and lower surfaces of the laminated sliced ​​batteries from the influence of ozone.

[0045] The two groups of loading side plates 212 are respectively fixed with avoidance positions 2121 located in the heating chamber 216, and adjustment grooves 2122 are symmetrically fixed on both sides of the avoidance positions 2121 of the loading side plates 212. Fixing members 2123 are arranged in the adjustment grooves 2122. The heating device 23 is installed in the heating chamber 216 through the fixing members 2123. At the same time, the distance between the heating device 23 located in the heating chamber 216 and the loading partition 213 can be adjusted by adjusting the position of the fixing members 2123 in the adjustment grooves 2122.

[0046] A reaction window 2131 is fixedly provided on the loading partition 213. The reaction window 2131 adopts a square structure. The heating device 23 is connected to the carrier device 22 through the reaction window 2131. At the same time, ozone flows through the reaction window 2131 into the carrier cavity 215 to passivate the cross section of the sliced ​​battery 3. The connecting area of ​​the reaction window 2131 matches the total area of ​​the cross section of the maximum number of sliced ​​batteries 3 that can be loaded by the carrier device 22. Figure 4 As shown, the thermocouple 15 extends to the heating chamber 216 and is located between the spray pipe 42 and the reaction window 2131 .

[0047] The spray device includes an air guide pipe 41 and a spray pipe 42, the air guide pipe 41 and the spray pipe 42 are connected, the air guide pipe 41 passes through the heating device 23 and the isolation body 12 in sequence and extends to the outside of the isolation box 1, and a plurality of evenly distributed spray holes (not shown in the figure) are fixed on the spray pipe 42 to ensure the uniformity of ozone spraying. In this embodiment, ozone is introduced into the spray pipe 42 through the air guide pipe 41 and sprayed out through the spray holes. The spray pipe 42 is opposite to the reaction window 2131, and the spray area of ​​the spray pipe 42 is opposite to the connection area of ​​the reaction window 2131. The spray pipe 42 is matched with the domain. When the spray pipe 42 sprays ozone, the air inlet pipe 43 continuously introduces protective gas, so that the ozone sprayed by the spray pipe 42 reacts with the cross-section near the cross-section of the sliced ​​battery 3, and will not enter the carrier cavity 215 area to damage the surface electrode and coating of the sliced ​​battery 3. This embodiment sprays ozone onto the end face of the sliced ​​battery 3 through the spray pipe 42. The operation is simple and can be carried out in industrial production, thereby increasing the passivation speed of the sliced ​​battery 3. The air guide pipe 41 can introduce protective gas, such as nitrogen, after the passivation reaction to purge the interior of the passivation box 2.

[0048] An exhaust device is arranged between the spray device and the heating device 23, and the exhaust device includes an exhaust pipe 52 and an exhaust pipe 51. The exhaust pipe 52 is fixedly provided with a plurality of exhaust holes (not marked in the figure), and the exhaust pipe 52 is connected with the exhaust pipe 51. The exhaust pipe 51 passes through the heating device 23 and the isolation body 12 in sequence and extends to the outside of the isolation box 1. A vacuum gauge 6 is arranged on the exhaust pipe 51 located on the outside. The exhaust device controls the air pressure in the passivation box 2, and detects the air pressure in the passivation box 2 through the vacuum gauge 6 to ensure that the air pressure in the passivation box 2 is stable within a set range. In this embodiment, the exhaust device serves as a structure for controlling the air pressure in the passivation box 2, so that the air pressure in the passivation box 2 is maintained within a set range.

[0049] In addition, in this embodiment, the spray device and the exhaust device can be moved in the heating chamber 216 to adjust the positions of the spray device and the exhaust device in the heating chamber 216. The spray device and the exhaust device can be moved separately, or the two can be connected first, and the synchronous movement of the two can be achieved by driving any of the devices. Of course, a third-party device can also be set to drive the two to move synchronously; by moving the spray device and the exhaust device, the distance between the two and the reaction window 2131 is adjusted, thereby adjusting the ozone flow in contact with the cross-section of the sliced ​​battery 3, so that the cross-section achieves a passivation effect but reduces the impact on the upper and lower surfaces of the silicon wafer.

[0050] like Figure 6As shown, the heating device 23 includes a shell 231 and a heating tube 233. The heating tube 233 can be an infrared lamp tube or an electric furnace wire. Preferably, the heating tube 233 is an infrared lamp tube; the length direction of the heating tube 233 is horizontally distributed. In this embodiment, the heating tube 233 is arranged in three groups. The three groups of heating tubes 233 are parallel to each other and evenly distributed in the shell 231. The heating tube 233 is fixed by a fixing rod 235. Specifically, the fixing rod 235 is symmetrically located on both sides of the heating tube 233. One group of heating tubes 233 corresponds to two groups of fixing rods 235. The heating tube 233 is stably fixed on the shell 231 by the fixing rod 235. The sides of the shell 231 are respectively fixed with fixing holes (not marked in the figure). The fixing member 2123 fixes and connects the heating device 23 and the loading structure 21 through the fixing hole and the adjustment groove 2122 in turn. The position of the heating device 23 in the heating chamber 216 is adjusted by adjusting the position of the fixing member 2123 in the adjustment groove 2122.

[0051] The carrier device 22 includes a carrier rear plate 221, a carrier left plate 223, a carrier right plate 224, a carrier bottom plate 225 and a carrier upper plate 222. The carrier bottom plate 225 is used to support a plurality of sliced ​​batteries 3 stacked in sequence. After stacking, the cross sections of the sliced ​​batteries 3 are all facing the reaction window 2131. The carrier rear plate 221, the carrier left plate 223 and the carrier right plate 224 are all installed on the carrier bottom plate 225. The carrier left plate 223 and the carrier right plate 224 are opposite to each other. The carrier rear plate 221, the carrier left plate 223, the carrier right plate 224 and the carrier bottom plate 225 form a carrying cavity (not shown) for carrying the sliced ​​battery 3. The sliced ​​battery 3 is placed in the carrying cavity. A plurality of sliced ​​batteries 3 can be stacked horizontally, vertically or in other stacking methods, as long as the sliced ​​batteries 3 can be closely arranged and the cross-section faces the reaction window 2131. The carrier upper plate 222 is used to cover the sliced ​​batteries 3 on the top layer, that is, through The sliced ​​battery 3 is fixed in the vertical direction by the carrier upper plate 222 and the carrier bottom plate 225 to limit the movement of the sliced ​​battery 3 in the vertical direction. The sliced ​​battery 3 is fixed in the horizontal direction by the carrier left side plate 223 and the carrier right side plate 224 to limit the movement of the sliced ​​battery 3 in the horizontal direction, so that the sliced ​​battery 3 is fastened in the carrying cavity. On the one hand, it avoids the ozone sweeping force causing the sliced ​​battery 3 to shake during the ozone spraying process, thereby ensuring the passivation effect of the sliced ​​battery 3. On the other hand, several sliced ​​batteries 3 are stacked in sequence, even if the front side of the sliced ​​battery 3 located below is completely covered with the back side of the sliced ​​battery 3 located above it, and the front and back sides of the sliced ​​battery 3 are covered by the carrier rear plate 221 and the carrier bottom plate 225. At the same time, the carrier left side plate 223 and the carrier right side plate 224 cover the left and right sides of the sliced ​​battery 3, thereby avoiding the adverse effects of ozone on the front, back and sides of the sliced ​​battery 3 during the passivation process.

[0052] The first positioning cavities 2211 are symmetrically fixed on both sides of the carrier rear plate 221, and the second positioning cavities 2251 are fixed on both sides of the carrier bottom plate 225. The first positioning cavity 2211 and the second positioning cavity 2251 on the same side are opposite to each other, and the widths of the two are consistent, so that the left side plate 223 of the carrier and the right side plate 224 of the carrier can be synchronously positioned in the horizontal and vertical directions when moving. A side plate pressing block 227 is fixed on any one or two groups of the first positioning cavities 2211, and the side plate pressing block 227 fixes the left side plate 223 of the carrier and / or the right side plate 224 of the carrier. The second positioning cavity 2251 of the group is fixedly provided with a limiting groove 2253. Taking the second positioning cavity 2251 located on the left side as an example, the second positioning cavity 2251 located on the left side is fixedly provided with a limiting groove 2253. A limiting block 2233 cooperating with the limiting groove 2253 is fixedly provided on the left side plate 223 of the carrier. The limiting block 2233 slides in the limiting groove 2253 to adjust the position of the left side plate 223 of the carrier in the second positioning cavity 2251. The left side plate 223 of the carrier is fixed by the positioning block 2234. Specifically, the positioning block 2234 includes a positioning rod 22342 and a positioning plate 2234. 2341, a shifting groove (not shown) is fixedly arranged on the positioning plate 22341, the positioning plate 22341 is composed of two sets of plates with different thicknesses, which are respectively set as plate 1 and plate 2, the thickness of plate 1 is less than the thickness of plate 2, a positioning groove 2232 is fixedly arranged on the left side plate 223 of the carrier, the positioning groove 2232 matches with plate 1, plate 1 is inserted into the positioning groove 2232 for fixing, the end face of plate 2 abuts against the left side plate 223 of the carrier, the lower end face of plate 2 abuts against the end face of the second positioning cavity 2251, the positioning rod 22342 is inserted into the shifting groove and the limiting groove 2253 in sequence, and then tightened to fix the left side of the carrier The plate 223 is fixed in the second positioning cavity 2251, that is, the position of the left side plate 223 of the carrier in the second positioning cavity 2251 is adjusted by the positioning block 2234, and the right side plate 224 of the carrier can be fixedly connected to the second positioning cavity 2251 located on the right side, that is, the position of the right side plate 224 of the carrier cannot be adjusted, and the distance between the left side plate 223 of the carrier and the right side plate 224 of the carrier is adjusted by the position of the left side plate 223 of the carrier in the second positioning cavity 2251. On the one hand, it is convenient for loading and unloading the sliced ​​batteries 3, and on the other hand, the carrier device 22 can adapt to sliced ​​batteries 3 of different sizes and has a wide range of applications.

[0053] A handle 2221 is fixedly provided on the upper end surface of the carrier upper plate 222 for easy taking of the carrier upper plate 222, and raised buckle blocks 2222 are fixedly provided at both ends of the carrier upper plate 222 and the carrier left side plate 223 and the carrier right side plate 224, respectively. A buckle cavity 2231 is fixedly provided on the carrier left side plate 223 and / or the carrier right side plate 224, and the buckle cavity 2231 matches the buckle block 222. The buckle block 2222 is inserted into the buckle cavity 2231 to limit the vertical position of the carrier upper plate 222, and at the same time, the carrier left side plate 223 and the carrier right side plate 224 are respectively provided with a pressing block 228, and the pressing block 228 can rotate in a circle relative to the left side plate 223 and the carrier right side plate 224, and the carrier upper plate 222 is fixed by two groups of pressing blocks 228.

[0054] The carrier rear plate 221 abuts against the diffuser 24, and a ventilation cavity 2213 is provided on the carrier rear plate 221. In the present embodiment, three groups of ventilation cavities 2213 are provided, and the three groups of ventilation cavities 2213 are opposite to the area where the diffusion holes on the diffuser 24 are distributed. A sealing ring 2212 is fixedly provided on the side where the carrier rear plate 221 abuts against the diffuser 24. The carrier rear plate 221 and the diffuser 24 are sealed and connected by the sealing ring 2212, so that the protective gas introduced by the air inlet pipe 43 can completely and evenly enter the load-bearing cavity through the diffusion holes and the ventilation cavity 2213, and the inside of the load-bearing cavity and the carrier cavity 215 are purged.

[0055] In this embodiment, the placement process of the sliced ​​battery 3 is as follows: the right side plate 224 of the carrier is fixed in the second positioning cavity 2251, the sliced ​​batteries 3 are stacked and the side faces are against the right side plate 224 of the carrier, and the left side plate 223 of the carrier is adjusted to the position in the second positioning cavity 2251 so that the side face of the left side plate 223 of the carrier is against the sliced ​​battery 3. At this time, the left side plate 223 of the carrier is fixed by the positioning block 2234, and the horizontal movement of the sliced ​​battery 3 is limited by the left side plate 223 and the right side plate 224 of the carrier. The buckle block 2222 of the upper plate 222 of the carrier is inserted into the buckle cavity 2231, covering the sliced ​​battery 3 on the top layer, and the upper plate 222 of the carrier is fixed by the pressing block 228, thereby limiting the vertical movement of the sliced ​​battery 3.

[0056] Embodiment 2:

[0057] like Fig.10 As shown, the difference between this embodiment and the first embodiment is that in the first embodiment, ozone is introduced by the air duct 41 and sprayed through the spray pipe 42, while in this embodiment, ozone is generated by irradiating oxygen through the ultraviolet lamp 232.

[0058] In this embodiment, the ultraviolet lamp tube 232 is fixed on the shell 231 of the heating device 23, and two groups of ultraviolet lamp tubes 232 are arranged. In the vertical direction, the ultraviolet lamp tube 232 and the heating tube 233 are spaced apart, that is, the ultraviolet lamp tube 232 is located between adjacent heating tubes 233, and in the horizontal direction, the ultraviolet lamp tube 232 is located on the rear side of the heating tube 233, that is, the heating tube 233 is located between the ultraviolet lamp tube 232 and the carrier device 22. In order to prevent the heating tube 233 from radiating heat to the ultraviolet lamp tube 232, a heat-insulating lampshade 234 is fixed between two groups of fixing rods 235 of a group of heating tubes 233; the two side ends of the ultraviolet lamp tube 232 extend to the outside of the shell 231, and when the heating device 23 is installed, the end of the ultraviolet lamp tube 232 is located in the avoidance position 2121.

[0059] In this embodiment, the exhaust device not only serves as a structure for controlling the air pressure in the passivation box 2, but also forms a gas curtain with the spray device. Specifically, oxygen is introduced into the air duct 41 of the spray device, and the oxygen is sprayed through the spray pipe 42. The spray device takes in air, and the exhaust device exhausts air. The two form a gas curtain, which can reduce the flow of oxygen into the carrier cavity 215. Through the ultraviolet light of the ultraviolet lamp tube 232, it reacts with oxygen to generate ozone, and the generated ozone is passivated at the cross-section of the sliced ​​battery.

[0060] In other embodiments, the left side plate 223 and the right side plate 224 of the carrier may adopt the same structure, and the right side plate 224 of the carrier may also adopt a positioning block 2234 or other structures to adjust the position in the second positioning cavity 2251 located on the right side, and the distance between the left side plate 223 and the right side plate 224 of the carrier is controlled by the positions of the left side plate 223 and the right side plate 224 of the carrier in the second positioning cavity 2251 respectively.

[0061] In other embodiments, the ultraviolet lamp 232 can be integrated, that is, the air duct 41 of the spray device can introduce a certain concentration of ozone, and the ultraviolet lamp 232 produces a certain concentration of ozone, and the two are combined to achieve passivation treatment of the sliced ​​battery 3.

[0062] The present invention also provides a passivation method, which uses the above-mentioned passivation equipment to passivate the cross-section of the sliced ​​battery 3. The passivation treatment includes passing ozone to the cross-section of the sliced ​​battery 3, thereby improving the passivation rate and effect. By using this method, the silicon dioxide protective layer formed on the cross-section of the sliced ​​battery 3 can avoid the recombination of photogenerated carriers, thereby greatly improving the photoelectric efficiency of the sliced ​​battery 3.

[0063] According to the present invention, the specific operation method is as follows:

[0064] (1) Slice battery 3 pre-installed;

[0065] The sliced ​​batteries 3 are stacked on the carrier device 2 , and the carrier device 2 is installed in the carrier cavity 215 , and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0066] (2) Vacuum leak detection;

[0067] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1; if the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good; if the air pressure value detected by the vacuum gauge 6 increases beyond a certain range, it means that the sealing of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the sealing of the isolation box 1 is good.

[0068] (3) Control the temperature and pressure of the passivation box 2;

[0069] Protective gas is introduced from the air inlet pipe 43, and the gas flow rate is controlled at 0.1slm-30slm. The exhaust device controls the air pressure in the passivation box 2 at 50mbar-1000mbar. The heating device 23 controls the temperature in the passivation box 2 at 50 degrees-500 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0070] (4) Passivation;

[0071] The air inlet pipe 43 continuously introduces protective gas. In the first embodiment, ozone is introduced into the air duct 41 of the spray device, and the spray pipe 42 sprays ozone onto the cross section of the sliced ​​battery 3 for passivation treatment. The concentration of ozone introduced into the air duct 41 is less than 1%, the flow rate is controlled at 0.1slm-30slm, and the ozone spraying time is controlled at 1min-60min. The concentration, flow rate and spraying time of ozone have a direct impact on the density of the silicon dioxide protection on the cross section. Low ozone concentration or short spraying time will result in low density of the silicon dioxide protective layer formed on the cross section. In the present embodiment, the concentration of ozone is less than 1%, the spraying time is controlled at 1min-60min, and the temperature is 50 degrees-500 degrees. First, it can ensure that a relatively dense silicon dioxide protective layer is formed on the cross section. Second, it does not cause waste of ozone. Third, it does not The ozone spraying time is prolonged to shorten the spraying cycle and improve the spraying efficiency. In the actual passivation treatment, a reasonable specific value is selected in the numerical range of the above concentration, flow rate and spraying time according to the thickness of the sliced ​​battery 3 to be passivated and the number of sliced ​​batteries, so as to form the most dense silicon dioxide protective layer at the lowest cost and the fastest speed. The flow rate of ozone spraying directly affects the speed of ozone flowing through the cross section, that is, the faster the spraying flow rate, the faster the silicon dioxide protective layer can be formed on the cross section. In this embodiment, the flow rate of ozone spraying is controlled at 0.1slm-30slm. First, it can ensure that the silicon dioxide protective layer is formed faster on the cross section. Second, it can ensure that the ozone in the process cross section is fully utilized and will not be wasted due to redundancy. Third, ozone will not enter the gaps in the silicon wafer stacking due to excessive ozone flow.

[0072] In the second embodiment, oxygen is introduced into the air duct 41 of the spray device, the spray pipe 42 sprays the oxygen, and the ultraviolet lamp 232 generates ozone of a set concentration in an oxygen environment with a certain concentration. The ozone contacts the cross section of the sliced ​​battery 3 through the reaction window 2131 for passivation treatment.

[0073] (5) Evacuate the chamber to remove ozone;

[0074] (6) Purge;

[0075] The air guide pipe 41 and the air inlet pipe 43 are passed through the protective gas to purge the inside of the passivation box 2, and the ventilation pipe 44 is passed through the protective gas or compressed air to purge the isolation cavity 121, while the gas is introduced and the gas is extracted to remove the residual ozone in the cavity;

[0076] (7) Annealing;

[0077] The protective gas is introduced into the air inlet pipe 43, and the flow rate of the gas is controlled at 0.5slm-30slm. The temperature is increased and controlled at 75 degrees-600 degrees for 2min-30min.

[0078] (8) Take sliced ​​battery 3;

[0079] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0080] The passivation method of the present invention is further described below in conjunction with specific embodiments.

[0081] Embodiment three:

[0082] In this embodiment, the specific steps of the method are as follows:

[0083] (1) Slice battery 3 pre-installed;

[0084] The sliced ​​batteries 3 are stacked on the carrier device 2, and the carrier device 2 is installed in the carrier cavity 215, and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0085] (2) Vacuum leak detection;

[0086] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1; if the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good.

[0087] If the air pressure value detected by the vacuum gauge 6 increases beyond a certain range, it indicates that the airtightness of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the airtightness of the isolation box 1 is good.

[0088] (3) Control the temperature and pressure of the passivation box 2;

[0089] Shielding gas is introduced from the air inlet pipe 43, and the gas flow rate is controlled at 1slm. Shielding gas is introduced into the air guide pipe 41, and the shielding gas flow rate is controlled at 0.5slm. The exhaust device controls the air pressure in the passivation box 2 at 100mbar. The heating device 23 controls the temperature in the passivation box 2 at 50 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0090] (4) Passivation;

[0091] The protective gas is continuously introduced into the air inlet pipe 43, and the gas flow rate is maintained at 1 slm. Ozone is introduced into the air guide pipe 41, and the concentration of ozone is set to 1800 ppm, the flow rate is controlled at 0.5 slm, and the ozone spraying time is controlled at 2 min.

[0092] (5) Evacuate the chamber to remove ozone;

[0093] (6) Purge;

[0094] Protective gas is introduced into the air guide pipe 41 and the air inlet pipe 43 to purge the inside of the passivation box 2, and protective gas or compressed air is introduced into the ventilation pipe 44 to purge the isolation cavity 121. Gas is introduced and extracted at the same time to eliminate residual ozone in the cavity.

[0095] (7) Annealing:

[0096] The protective gas is introduced into the air inlet pipe 43, and the flow rate of the protective gas is controlled at 0.5slm-30slm. The temperature is raised and controlled at 150 degrees for 30 minutes;

[0097] (8) Take sliced ​​battery 3;

[0098] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0099] Battery 3 was sliced ​​after passivation using this method and was recorded as experimental group 1.

[0100] Embodiment 4:

[0101] In this embodiment, the specific steps of the method are as follows:

[0102] (1) Slice battery 3 pre-installed;

[0103] The sliced ​​batteries 3 are stacked on the carrier device 2 , and the carrier device 2 is installed in the carrier cavity 215 , and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0104] (2) Vacuum leak detection;

[0105] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1; if the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good.

[0106] If the air pressure value detected by the vacuum gauge 6 increases beyond a certain range, it indicates that the airtightness of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the airtightness of the isolation box 1 is good.

[0107] (3) Control the temperature and pressure of the passivation box 2;

[0108] Shielding gas is introduced from the air inlet pipe 43, and the shielding gas flow rate is controlled at 5slm. Shielding gas is introduced into the air guide pipe 41, and the shielding gas flow rate is controlled at 2slm. The exhaust device controls the air pressure in the passivation box 2 at 950mbar. The heating device 23 controls the temperature in the passivation box 2 at 500 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0109] (4) Passivation;

[0110] The air inlet pipe 43 continuously introduces protective gas, and the protective gas flow rate is maintained at 5slm. The air guide pipe 41 introduces ozone, and the concentration of ozone is set to 400ppm, the flow rate is controlled at 2slm, and the ozone spraying time is controlled at 30min.

[0111] (5) Evacuate the chamber to remove ozone;

[0112] (6) Purge;

[0113] Protective gas is introduced into the air guide pipe 41 and the air inlet pipe 43 to purge the inside of the passivation box 2, and protective gas or compressed air is introduced into the ventilation pipe 44 to purge the isolation cavity 121. Gas is introduced and extracted at the same time to eliminate residual ozone in the cavity.

[0114] (7) Annealing;

[0115] The protective gas is introduced into the air inlet pipe 43, and the flow rate of the protective gas is controlled at 0.5slm-30slm. The temperature is raised and controlled at 600 degrees for 10 minutes.

[0116] (8) Take sliced ​​battery 3;

[0117] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0118] Battery 3 was sliced ​​after passivation using this method and was recorded as experimental group 2.

[0119] Embodiment five:

[0120] In this embodiment, the specific steps of the method are as follows:

[0121] (1) Slice battery 3 pre-installed;

[0122] The sliced ​​batteries 3 are stacked on the carrier device 2 , and the carrier device 2 is installed in the carrier cavity 215 , and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0123] (2) Vacuum leak detection;

[0124] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1. If the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good. If the air pressure detected by the vacuum gauge 6 increases beyond a certain range, it means that the sealing of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the sealing of the isolation box 1 is good.

[0125] (3) Control the temperature and pressure of the passivation box 2;

[0126] Shielding gas is introduced from the air inlet pipe 43, and the shielding gas flow rate is controlled at 5slm. Shielding gas is introduced into the air guide pipe 41, and the shielding gas flow rate is controlled at 2slm. The exhaust device controls the air pressure in the passivation box 2 at 950mbar. The heating device 23 controls the temperature in the passivation box 2 at 200 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0127] (4) Passivation;

[0128] The air inlet pipe 43 continuously introduces protective gas, and the protective gas flow rate is maintained at 5slm. The air guide pipe 41 introduces ozone, and the flow rate is controlled at 2slm. The ultraviolet lamp 232 is turned on and the time is controlled at 30min.

[0129] (5) Evacuate the chamber to remove ozone;

[0130] (6) Purge;

[0131] Protective gas is introduced into the air guide pipe 41 and the air inlet pipe 43 to purge the inside of the passivation box 2, and protective gas or compressed air is introduced into the ventilation pipe 44 to purge the isolation cavity 121. Gas is introduced and extracted at the same time to eliminate residual ozone in the cavity.

[0132] (7) Annealing;

[0133] The protective gas is introduced into the air inlet pipe 43, and the flow rate of the protective gas is controlled at 0.5slm-30slm. The temperature is raised and controlled at 300 degrees for 10 minutes.

[0134] (8) Take sliced ​​battery 3;

[0135] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0136] Battery 3 was sliced ​​after passivation using this method and was recorded as experimental group 3.

[0137] Comparative Example 1:

[0138] In this embodiment, the method is different from the above embodiment in that the step of introducing the protective gas into the air inlet pipe 43 is not performed. The specific steps of the method are as follows:

[0139] (1) Slice battery 3 pre-installed;

[0140] The sliced ​​batteries 3 are stacked on the carrier device 2 , and the carrier device 2 is installed in the carrier cavity 215 , and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0141] (2) Vacuum leak detection;

[0142] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1; if the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good; if the air pressure value detected by the vacuum gauge 6 increases beyond a certain range, it means that the sealing of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the sealing of the isolation box 1 is good.

[0143] (3) Control the temperature and pressure of the passivation box 2;

[0144] The air duct 41 introduces protective gas, and the protective gas flow rate is controlled at 2slm. The exhaust device controls the air pressure in the passivation box 2 at 800mbar. The heating device 23 controls the temperature in the passivation box 2 at 150 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0145] (4) Passivation;

[0146] Ozone is introduced into the air duct 41, the concentration of ozone is set to 200 ppm, the flow rate is controlled at 0.5 slm, and the ozone spraying time is controlled at 5 minutes.

[0147] (5) Evacuate the chamber to remove ozone;

[0148] (6) Purge;

[0149] The air guide pipe 41 introduces protective gas to purge the interior of the passivation box 2, and the ventilation pipe 44 introduces protective gas or compressed air to purge the isolation chamber 121;

[0150] (7) Annealing; the protective gas is introduced into the air inlet pipe 43, the flow rate of the protective gas is controlled at 0.5slm-30slm, the temperature is raised, the temperature is controlled at 350 degrees, and the time is 18min;

[0151] (8) Take sliced ​​battery 3;

[0152] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0153] Battery 3 was sliced ​​after passivation using this method and was recorded as control group 1.

[0154] Comparative Example 2:

[0155] In this embodiment, the method is different from the above embodiment in that the step of introducing protective gas into the air inlet pipe 43 is not performed, and ozone is not introduced. The specific steps of the method are as follows:

[0156] (1) Slice battery 3 pre-installed;

[0157] The sliced ​​batteries 3 are stacked on the carrier device 2 , and the carrier device 2 is installed in the carrier cavity 215 , and the cover plate 25 and the isolation cover plate 11 are placed in sequence.

[0158] (2) Vacuum leak detection;

[0159] The exhaust device is evacuated, and the air pressure is detected by the vacuum gauge 6 to confirm the sealing of the isolation box 1; if the air pressure value detected by the vacuum gauge 6 changes within the allowable range, it means that the sealing of the isolation box 1 is good; if the air pressure value detected by the vacuum gauge 6 increases beyond a certain range, it means that the sealing of the isolation box 1 is poor, and the isolation box 1 needs to be sealed until the sealing of the isolation box 1 is good.

[0160] (3) Control the temperature and pressure of the passivation box 2;

[0161] The air duct 41 introduces protective gas, and the protective gas flow rate is controlled at 2slm. The exhaust device controls the air pressure in the passivation box 2 at 800mbar. The heating device 23 controls the temperature in the passivation box 2 at 450 degrees, and the passivation box 2 maintains a constant temperature and pressure state.

[0162] (4) introducing oxygen;

[0163] Oxygen is introduced into the air duct 41, the oxygen flow rate is controlled at 2 slm, and the oxygen spraying time is controlled at 20 min.

[0164] (5) Vacuuming;

[0165] (6) Purge;

[0166] The air guide pipe 41 introduces protective gas to purge the interior of the passivation box 2, and the ventilation pipe 44 introduces protective gas or compressed air to purge the isolation chamber 121;

[0167] (7) Annealing;

[0168] Introduce protective gas, such as nitrogen, with the flow rate of protective gas controlled at 0.5slm-30slm, and heat up to 550 degrees for 10 minutes;

[0169] (8) Take sliced ​​battery 3;

[0170] After the protective gas or compressed air is filled to return to normal pressure, the isolation cover 11 and the cover 25 are opened in sequence, the carrier device 2 is first taken out, and then the passivated sliced ​​battery 3 is taken out.

[0171] Battery 3 was sliced ​​after passivation using this method and was recorded as control group 2.

[0172] The electrical properties of the sliced ​​batteries 3 of Examples 3, 4, 5 and Comparative Examples 1 and 2 before and after the passivation treatment by the method were tested, and the oxidation of the electrodes and the surface coating of the sliced ​​batteries 3 in each example was observed. Each example was set to 20 pieces, and the above five examples were subjected to control tests. The test results are as follows:

[0173] Table 1

[0174]

[0175] According to the above test results, it can be known that the sliced ​​battery 3 obtained by the method of the present invention can improve the efficiency of the sliced ​​battery 3 and protect the electrodes and surface coating of the sliced ​​battery 3 to prevent oxidation.

[0176] In addition, the annealing process in step 7 is an optional process, and in other embodiments, there may be no annealing process.

[0177] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A passivation device, characterized in that: It includes an isolation box, a passivation box located in the isolation box, and a carrier device and a heating device located inside the passivation box. The carrier device carries the sliced ​​battery. The heating device controls the temperature in the passivation box. A spray device is provided between the carrier device and the heating device. The spray device sprays oxygen or sprays passivation gas on the cross section of the sliced ​​battery. It also includes an ultraviolet lamp. The ultraviolet light of the ultraviolet lamp reacts the oxygen sprayed by the spray device into ozone. The ozone contacts the cross section of the sliced ​​battery for passivation treatment. The isolation box includes an isolation body and an isolation cover. The isolation body includes an isolation cavity. The passivation box is located in the isolation cavity. A sealing ring is provided on the upper end face of the isolation body. A vent pipe and a thermocouple are provided on the isolation body. The vent pipe is connected to the isolation cavity. Protective gas or compressed air is introduced into the vent pipe to purge the isolation cavity. The thermocouple extends to the passivation cavity. The temperature in the passivation box is measured, the passivation box also includes a cover plate and a loading structure for loading a carrier device and a heating device, the loading structure includes a loading bottom plate, a loading connecting plate, a loading partition and two groups of loading side plates, the two groups of loading side plates are symmetrically arranged and fixedly connected to the loading bottom plate and the loading connecting plate, the loading partition is fixedly connected to the two groups of loading side plates, and the loading structure forms a carrier cavity for loading the carrier device and a heating cavity for loading the heating device through the loading partition. The two groups of loading side plates are respectively fixed with avoidance positions located in the heating cavity, and adjustment grooves are symmetrically fixed on both sides of the avoidance positions of the loading side plates, and fixings are arranged in the adjustment grooves, and the heating device is installed in the heating cavity through the fixings, and the distance between the heating device in the heating cavity and the loading partition is adjusted by adjusting the position of the fixing in the adjustment groove.

2. A passivation device according to claim 1, characterized in that: The loading partition is fixedly provided with a reaction window, the heating device is connected with the carrier device through the reaction window, the passivation gas flows into the carrier cavity through the reaction window to passivate the cross section of the sliced ​​battery, the loading connecting plate is connected with a diffusion piece, a plurality of groups of diffusion holes are fixed on the diffusion piece, an air intake pipe is connected to the loading connecting plate, the air intake pipe passes through the isolation body and extends outward, the air intake pipe passes nitrogen to the carrier device and the carrier cavity, and the diffusion holes of the diffusion piece control the diffusion uniformity of the nitrogen passed into the air intake pipe.

3. A passivation device according to claim 2, characterized in that: The carrier device includes a carrier rear plate, a carrier left plate, a carrier right plate, a carrier bottom plate and a carrier upper plate. The carrier bottom plate is used to support the sliced ​​battery, and the cross-section of the sliced ​​battery faces the reaction window. The carrier rear plate, the carrier left plate and the carrier right plate are all installed on the carrier bottom plate. The carrier left plate and the carrier right plate are symmetrically distributed. The carrier rear plate, the carrier left plate, the carrier right plate and the carrier bottom plate form a carrying cavity for carrying the sliced ​​battery. The carrier upper plate and the carrier bottom plate limit the movement of the sliced ​​battery in the vertical direction, and the carrier left plate and the carrier right plate limit the movement of the sliced ​​battery in the horizontal direction.

4. A passivation device according to claim 1, characterized in that: The heating device includes a shell and a heating tube. The heating tube adopts an infrared lamp tube or an electric furnace wire. The heating tube is fixed to the shell through a fixing rod. The sides of the shell are respectively fixed with fixing holes. The fixing parts fix the heating device and the loading structure through the fixing holes and the adjustment grooves in turn.

5. A passivation device according to claim 3, characterized in that: The spray device includes an air duct and a spray pipe, which are connected to each other. The air duct passes through the heating device and the isolation body and extends to the outside of the isolation box. A plurality of spray holes are fixed on the spray pipe. The spray pipe is opposite to the reaction window. The passivation gas is introduced through the air duct and sprayed onto the cross section of the sliced ​​battery through the spray holes. The protective gas is introduced into the air duct to purge the inside of the passivation box.

6. A passivation device according to claim 1, characterized in that: It also includes an exhaust device, which includes an exhaust pipe and an exhaust pipe. The exhaust pipe is fixed with a plurality of exhaust holes. The exhaust pipe and the exhaust pipe are connected. The exhaust pipe passes through the heating device and the isolation body in sequence and extends to the outside of the isolation box. A vacuum gauge is provided on the exhaust pipe. The exhaust device controls the air pressure in the passivation box and detects the air pressure in the passivation box through the vacuum gauge. The exhaust device controls the air pressure in the passivation box within a set range.

7. A passivation device according to claim 4, characterized in that: The ultraviolet lamp tube is fixed on the shell of the heating device, the heating tube is located between the ultraviolet lamp tube and the carrier device, and the ultraviolet lamp tube and the heating tube are isolated by a heat-insulating lampshade.

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