Ultraviolet curing device and continuous ultraviolet curing furnace

Abstract

The invention discloses an ultraviolet curing device and a continuous ultraviolet curing furnace, and relates to the technical field of battery production. According to the ultraviolet curing device, ultraviolet light emitted by the mercury lamp is reflected through the semi-elliptical reflecting lampshade, so that the energy of the ultraviolet light is concentrated on a battery piece, the illumination energy density is improved, the curing time is shortened, the curing efficiency is improved, the curing effect is ensured, and the productivity is improved; the high illumination energy density means that the illumination intensity on the unit area of the battery piece is higher, so that the photoinitiator in the ultraviolet insulation paste can generate living free radicals more quickly, the polymerization reaction is accelerated, and the ultraviolet insulation paste is suitable for scenes needing quick curing; meanwhile, hot air in the reflecting lampshade is quickly exhausted through the exhaust mechanism, and the battery piece is air-cooled through the air cooling mechanism, so that the temperature of the battery piece is effectively reduced, a passive film layer is prevented from being damaged, and the quality of the battery piece is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to an ultraviolet curing device and a continuous ultraviolet curing furnace. Background Art

[0002] At present, in the production process of solar cells, insulating glue is often used to achieve insulation between electrodes of different polarities. Depending on the type of insulating glue, it needs to be thermally cured or UV cured. For UV insulating glue, it needs to be irradiated with an ultraviolet light source (such as a mercury lamp) to achieve the curing function. However, the ultraviolet light emitted by the mercury lamp is relatively scattered, resulting in insufficient concentration of ultraviolet light energy, a long curing time, and low curing efficiency. At the same time, due to the continuous irradiation of ultraviolet light on the cell, the temperature of the cell is high, and the process temperature of the amorphous silicon passivation film layer in the cell generally cannot exceed 220°C. If it exceeds 220°C, the passivation film layer will be damaged.

[0003] It should be noted that this part of the present invention only provides background technology related to the present invention and does not necessarily constitute prior art or known technology. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art that the ultraviolet light energy is relatively dispersed, the curing time is long, the curing efficiency is low, and the temperature of the battery cell is high during the curing process and the passivation film layer thereon is damaged. A UV curing device and a continuous UV curing furnace are provided. The UV curing device reflects the ultraviolet light emitted by the mercury lamp through a semi-elliptical reflective lampshade so that the ultraviolet light energy is concentrated on the battery cell, the light energy density is increased, the curing time is shortened, the curing efficiency is improved, the curing effect is guaranteed, and the production capacity is increased. The high light energy density means that the light intensity per unit area of ​​the battery cell is higher, which can make the photoinitiator in the ultraviolet insulating glue generate active free radicals faster, thereby accelerating the polymerization reaction, and is suitable for scenes requiring rapid curing. At the same time, the hot air in the reflective lampshade is quickly discharged through the exhaust mechanism, and the battery cell is air-cooled through the air cooling mechanism, which effectively reduces the temperature of the battery cell, avoids damage to the passivation film layer, and ensures the quality of the battery cell.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a UV curing device, including a reflective lampshade, a mercury lamp, an exhaust mechanism and an air cooling mechanism. The cross-section of the reflective lampshade is semi-elliptical, and the ellipse formed by the semi-elliptical mirror image of the reflective lampshade has a first focus and a second focus, the first focus is located inside the reflective lampshade, and the second focus is located outside the reflective lampshade. The mercury lamp is installed in the reflective lampshade and arranged at the first focus, and the mercury lamp is used to UV-cure a battery cell arranged near the second focus; the exhaust mechanism is installed at one end of the reflective lampshade away from the battery cell, and the exhaust mechanism is used to extract the air in the reflective lampshade; the air cooling mechanism is arranged outside the reflective lampshade, and the air cooling mechanism is used to air-cool the battery cell.

[0006] Preferably, the cross section of the mercury lamp is circular, and the center of the circle of the mercury lamp is the first focus.

[0007] Preferably, the length of the major axis of the ellipse is 5 cm-40 cm; and / or the length of the minor axis of the ellipse is 3 cm-15 cm.

[0008] Preferably, the reflective lampshade has an opening, the position of the opening corresponds to the position of the battery cell, and the battery cell is arranged parallel to and spaced from the plane where the opening is located.

[0009] Preferably, the distance between the battery cell and the second focus is 0-a / 4, wherein a is the length of the major axis of the ellipse.

[0010] Preferably, the exhaust mechanism comprises an exhaust pump and an exhaust pipe, the reflective lampshade is provided with an exhaust port, one end of the exhaust pump is connected to the exhaust port, and the other end is connected to the exhaust pipe.

[0011] Preferably, the air cooling mechanism includes an air outlet pump, a refrigerator and an air outlet pipe. The air outlet pump is connected to the air outlet pipe through the refrigerator. The air outlet pipe and the reflective lamp cover are arranged side by side. The side wall of the air outlet pipe is provided with multiple air outlets, which are used to guide the outlet air flow to the battery cell.

[0012] Preferably, there are two air outlet pipes, which are arranged opposite to each other on two sides of the reflective lampshade.

[0013] Preferably, the diameter of the air outlet is 1 mm-5 mm; and / or the ratio of the cross-sectional area of ​​the air outlet pipe to the total area of ​​the plurality of air outlets is 1-5.

[0014] Preferably, a preset angle is formed between the air outlet direction of the air outlet and the minor axis of the ellipse, and the preset angle is 20°-80°; and / or, the distance between the air outlet pipe and the battery cell is 1 cm-15 cm.

[0015] In a second aspect, the present invention provides a continuous UV curing furnace, comprising a transmission device and the above-mentioned UV curing device, wherein the transmission device is arranged below the UV curing device at intervals, and the transmission device is used to transport battery cells.

[0016] Preferably, there are multiple ultraviolet curing devices, and the multiple ultraviolet curing devices are arranged side by side along the short axis direction of the ellipse.

[0017] Beneficial effects: The present invention adopts the above-mentioned technical scheme, especially reflects the ultraviolet light emitted by the mercury lamp through a semi-elliptical reflective lampshade, so that the ultraviolet light energy is concentrated on the battery cell, the light energy density is improved, the curing time is shortened, the curing efficiency is improved, the curing effect is guaranteed, and the production capacity is increased. The high light energy density means that the light intensity per unit area of ​​the battery cell is higher, which can make the photoinitiator in the ultraviolet insulating glue produce active free radicals faster, thereby accelerating the polymerization reaction, and is suitable for scenes requiring rapid curing. At the same time, the hot air in the reflective lampshade is quickly discharged through the exhaust mechanism, and the battery cell is air-cooled through the air cooling mechanism, which effectively reduces the temperature of the battery cell, avoids damage to the passivation film layer, and ensures the quality of the battery cell.

[0018] The continuous ultraviolet curing furnace of the present invention can realize continuous curing of battery cells, has high curing efficiency, good curing effect, and avoids high temperature damage to the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the structure of an ultraviolet curing device provided in an embodiment of the present invention; Figure 2 A cross-sectional view of a UV curing device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of an air cooling mechanism in a UV curing device provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a continuous UV curing oven provided in an embodiment of the present invention.

[0021] Description of reference numerals: 10-continuous UV curing furnace; 100-UV curing device; 110-reflective lampshade; 111-opening; 112-exhaust port; 120-mercury lamp; 130-exhaust mechanism; 131-exhaust pump; 132-exhaust pipe; 140-air cooling mechanism; 141-air outlet pump; 142-refrigerator; 143-air outlet pipe; 144-air outlet; 200-transmission device; 300-battery cell. DETAILED DESCRIPTION

[0022] In the present invention, unless otherwise specified, directional words such as "upper, lower, left, right" are generally understood in conjunction with the directions shown in the drawings and actual applications.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article. Among them, the terms "optional" and "optional" all mean that they may be included or not included (or may be present or not).

[0026] Through research, it is found that in the process of UV curing of cells in the prior art, the ultraviolet light emitted by the mercury lamp is relatively dispersed, resulting in insufficient concentration of ultraviolet light energy, a long curing time, and low curing efficiency. At the same time, due to the continuous irradiation of ultraviolet light on the cell, the temperature of the cell is high, and the process temperature of the amorphous silicon passivation film layer in the cell generally cannot exceed 220°C. If it exceeds 220°C, the passivation film layer will be damaged. Based on this, further research is conducted and the present invention is proposed.

[0027] First, please refer to Figures 1 to 3The embodiment of the present invention provides a UV curing device 100, which reflects the UV light emitted by the mercury lamp 120 through a semi-elliptical reflective lampshade 110, so that the UV light energy is concentrated on the battery cell 300, thereby improving the light energy density, shortening the curing time, improving the curing efficiency, ensuring the curing effect, and improving the production capacity. The high light energy density means that the light intensity per unit area of ​​the battery cell 300 is higher, which can make the photoinitiator in the UV insulating glue generate active free radicals faster, thereby accelerating the polymerization reaction, and is suitable for scenes that require rapid curing. At the same time, the hot air in the reflective lampshade 110 is quickly discharged through the exhaust mechanism 130, and the battery cell 300 is air-cooled through the air cooling mechanism 140, which effectively reduces the temperature of the battery cell 300, avoids damage to the passivation film layer, and ensures the quality of the battery cell 300.

[0028] The ultraviolet curing device 100 includes a reflective lampshade 110, a mercury lamp 120, an exhaust mechanism 130 and an air cooling mechanism 140. The mercury lamp 120 is installed in the reflective lampshade 110, and the mercury lamp 120 is used to emit ultraviolet light. The reflective lampshade 110 is used to reflect the ultraviolet light emitted by the mercury lamp 120 so that the ultraviolet light energy is concentrated on the battery cell 300. In this process, the air in the reflective lampshade 110 is irradiated by the ultraviolet light and the temperature rises. The exhaust mechanism 130 is installed at one end of the reflective lampshade 110 away from the battery cell 300. The exhaust mechanism 130 is used to extract the air in the reflective lampshade 110 and suck the outside air into the reflective lampshade 110 to achieve the exchange of air in the reflective lampshade 110, reduce the temperature in the reflective lampshade 110, and thus assist in reducing the temperature of the battery cell 300. The air cooling mechanism 140 is disposed outside the reflective lampshade 110 , and is used to cool the battery cell 300 , so as to directly reduce the temperature of the battery cell 300 , avoid damage to the passivation film layer, and ensure the quality of the battery cell 300 .

[0029] Furthermore, the cross section of the reflective lampshade 110 is semi-elliptical, and the ellipse formed by the semi-elliptical mirror image of the reflective lampshade 110 has a first focus and a second focus, wherein the first focus is located inside the reflective lampshade 110, and the second focus is located outside the reflective lampshade 110. The mercury lamp 120 is installed in the reflective lampshade 110 and is arranged at the first focus. The mercury lamp 120 is used to perform ultraviolet curing on the battery cell 300 arranged near the second focus. During this process, a part of the ultraviolet light emitted by the mercury lamp 120 is directly irradiated on the battery cell 300, and the other part is reflected to the battery cell 300 through the inner wall of the reflective lampshade 110, so that the ultraviolet light energy is concentrated on the battery cell 300, and the ultraviolet light concentration is relatively high. Specifically, the ultraviolet light emitted by the mercury lamp 120 at the first focus is focused by the reflective lampshade 110 onto the battery cell 300 located near the second focus. The high-density ultraviolet light irradiation allows the insulating ink on the battery cell 300 to cure quickly and fully, effectively shortening the curing time, improving the curing efficiency, ensuring the curing effect, and increasing production capacity. The high light energy density means that the light intensity per unit area of ​​the battery cell 300 is higher, which can enable the photoinitiator in the ultraviolet insulating glue to generate active free radicals faster, thereby accelerating the polymerization reaction, and is suitable for scenarios that require rapid curing.

[0030] In this embodiment, the semi-elliptical reflective lampshade 110 is applied to the field of battery production technology. According to the geometric properties of the ellipse, light emitted from one focus will pass through another focus after being reflected by the ellipse (there may be errors in actual applications, and it is necessary to debug to make most of the light emitted from one focus pass through the other focus). Therefore, the mercury lamp 120 is set at the first focus, and the battery cell 300 is set at the second focus to ensure that the ultraviolet light energy density received by the battery cell 300 is high, thereby achieving rapid curing.

[0031] In this embodiment, the mercury lamp 120 is in the shape of an elongated cylinder, and the cross section of the mercury lamp 120 is circular. The center of the circle of the mercury lamp 120 is the first focus, that is, the first focus is located at the center of the mercury lamp 120, so that the ultraviolet light emitted by the mercury lamp 120 can be evenly irradiated to the inner wall of the reflective lampshade 110, and then concentratedly reflected to the battery cell 300, thereby improving the concentration of ultraviolet light, shortening the curing time, and improving the curing efficiency. However, it is not limited to this. In other embodiments, the first focus can be located at any position of the circle of the mercury lamp 120, and the setting position of the mercury lamp 120 is not specifically limited.

[0032] Preferably, the length of the major axis of the ellipse is 5cm-40cm, and the length of the minor axis of the ellipse is 3cm-15cm. Reasonable ellipse size can control the distance between the mercury lamp 120 and the reflective lampshade 110 and between the mercury lamp 120 and the battery cell 300, which is beneficial for the exhaust mechanism 130 and the air cooling mechanism 140 to effectively cool the reflective lampshade 110 and the battery cell 300, while reducing the arrangement distance of the mercury lamp 120, increasing the arrangement density of the mercury lamp 120, and further improving the curing efficiency.

[0033] It is worth noting that the reflective lampshade 110 has an opening 111, the position of the opening 111 corresponds to the position of the battery cell 300, the battery cell 300 is arranged parallel to the plane where the opening 111 is located, and the plane where the opening 111 is located is the plane where the short axis of the ellipse is located. The ultraviolet light directly emitted by the mercury lamp 120 and the ultraviolet light reflected by the reflective lampshade 110 are both emitted outward through the opening 111 to be concentrated on the battery cell 300, and the ultraviolet light concentration is high.

[0034] Preferably, the battery cell 300 can be arranged on the side of the second focus close to the reflective lampshade 110, or on the side of the second focus away from the reflective lampshade 110. The distance between the battery cell 300 and the second focus is 0-a / 4, where a is the length of the major axis of the ellipse. A reasonable distance between the battery cell 300 and the second focus can adjust the range of ultraviolet light focusing by the position of the battery cell 300, which is conducive to the adjustment of light energy density and curing time, and achieves a better curing effect. At the same time, combined with the cooling parameters of the exhaust mechanism 130 and the air cooling mechanism 140, the cooling effect of the battery cell 300 is better.

[0035] The exhaust mechanism 130 includes an exhaust pump 131 and an exhaust pipe 132. The reflective lampshade 110 is provided with an exhaust port 112, one end of the exhaust pump 131 is connected to the exhaust port 112, and the other end is connected to the exhaust pipe 132. The exhaust pump 131 is used to extract the hot air in the reflective lampshade 110. In this process, the hot air is discharged outward through the exhaust port 112, the exhaust pump 131 and the exhaust pipe 132 in sequence, and the outside air enters the reflective lampshade 110 from the opening 111 of the reflective lampshade 110 to achieve air exchange in the reflective lampshade 110, effectively reduce the temperature in the reflective lampshade 110, and thus assist in reducing the temperature of the battery cell 300.

[0036] The air cooling mechanism 140 includes an air outlet pump 141, a refrigerator 142 and an air outlet pipe 143. The air outlet pump 141 is connected to the air outlet pipe 143 through the refrigerator 142. The air outlet pump 141 is used to blow out the outlet air flow, the refrigerator 142 is used to cool the outlet air flow to reduce the temperature of the outlet air flow, and the air outlet pipe 143 is used to guide the outlet air flow after cooling to achieve the air outlet function. Specifically, the air outlet pipe 143 is arranged side by side with the reflective lampshade 110, and a plurality of air outlets 144 are provided on the side wall of the air outlet pipe 143. The air outlet direction of the air outlet 144 is directly facing the battery cell 300. The air outlet 144 is used to guide the outlet air flow to the battery cell 300, so as to use the outlet air flow after cooling to cool the battery cell 300, quickly reduce the temperature of the battery cell 300, avoid damage to the passivation film layer, and ensure the quality of the battery cell 300.

[0037] Furthermore, the position where the outlet airflow directly blows on the battery cell 300 is the same as the position where the ultraviolet light is concentrated on the battery cell 300 (this position is the curing area), so as to quickly and fully cure the curing area of ​​the battery cell 300 while preventing the temperature of the curing area of ​​the battery cell 300 from being too high, avoid damage to the passivation film layer, and ensure the quality of the battery cell 300. It should be noted that in the actual curing process, the battery cell 300 will move relative to the ultraviolet curing device 100, and pass through the direct blowing position of the outlet airflow (that is, the concentrated irradiation position of the ultraviolet light) to achieve continuous curing of multiple battery cells 300. During this process, the position of the curing area of ​​the battery cell 300 will change synchronously to achieve the curing operation of the entire battery cell 300.

[0038] It should be noted that during the air cooling process of the air cooling mechanism 140, the refrigerated outlet air flow blown out from the air outlet 144 rebounds upward after being blown to the battery cell 300, and is then sucked into the reflective lampshade 110 under the suction force of the exhaust mechanism 130 to achieve air exchange in the reflective lampshade 110. In this process, since the temperature of the outlet air flow is relatively low, the temperature in the reflective lampshade 110 can be further reduced, thereby assisting in reducing the temperature of the battery cell 300.

[0039] Preferably, there are two air outlet pipes 143, which are relatively arranged on both sides of the reflective lampshade 110. The two air outlet pipes 143 are connected to the refrigerator 142. The refrigerated air flow enters the two air outlet pipes 143 at the same time under the action of the air outlet pump 141, and is blown out from the air outlets 144 of the two air outlet pipes 143 at the same time to increase the air outlet volume, thereby enhancing the cooling effect on the battery cell 300 and ensuring the quality of the battery cell 300.

[0040] Preferably, the diameter of the air outlet 144 is 1 mm-5 mm. A reasonable diameter of the air outlet 144 can keep the outlet airflow at a relatively high velocity and have a more significant directionality, which is beneficial for the outlet airflow to fully cool down the battery cell 300 .

[0041] Preferably, the ratio of the cross-sectional area of ​​the air outlet duct 143 to the total area of ​​the multiple air outlets 144 is 1-5. A reasonable ratio of the cross-sectional area of ​​the air outlet duct 143 to the total area of ​​the multiple air outlets 144 can maintain sufficient wind pressure and flow, which is conducive to maintaining a stable flow rate and flow of the air flow blown out by the multiple air outlets 144.

[0042] Preferably, a preset angle is formed between the air outlet direction of the air outlet 144 and the short axis of the ellipse, and the preset angle is 20°-80°. A reasonable preset angle can make the air flow blown out from the air outlet 144 effectively point to the solidification area of ​​the battery cell 300, which is beneficial to improve the cooling efficiency of the air flow and quickly reduce the temperature of the solidification area of ​​the battery cell 300.

[0043] Preferably, the distance between the air outlet duct 143 and the battery cell 300 is 1cm-15cm. A reasonable distance between the air outlet duct 143 and the battery cell 300 can control the path length of the air flow blown out from the air outlet 144 to the solidification area of ​​the battery cell 300, which is conducive to adjusting the cooling effect through the path length.

[0044] Preferably, the temperature of the outlet air flow after cooling by the refrigerator 142 is -40°C to 15°C. Using the outlet air flow at this temperature to cool the battery cell 300 can make the average temperature of the battery cell 300 less than 200°C, thereby avoiding damage to the passivation film layer and ensuring the quality of the battery cell 300.

[0045] In this embodiment, the refrigerator 142 is a vortex cooler, but is not limited thereto. In other embodiments, the refrigerator 142 may be a semiconductor refrigerator 142 or a heat exchanger, and the type of the refrigerator 142 is not specifically limited.

[0046] Second, please refer to Figure 4The embodiment of the present invention provides a continuous UV curing furnace 10, comprising a transmission device 200 and the above-mentioned UV curing device 100. The transmission device 200 is arranged below the UV curing device 100 at intervals, and the transmission device 200 is used to transport the battery cell 300 so that the battery cell 300 passes under the UV curing device 100. In this process, on the one hand, the mercury lamp 120 and the reflective lampshade 110 in the UV curing device 100 work together to focus the UV light on the battery cell 300, so that the insulating ink on the battery cell 300 is quickly and fully cured, and the curing efficiency is improved. On the other hand, the exhaust mechanism 130 and the air cooling mechanism 140 work together to quickly reduce the temperature of the space from the reflective lampshade 110 to the battery cell 300, thereby reducing the temperature of the battery cell 300, avoiding damage to the passivation film layer of the battery cell 300, and ensuring the quality of the battery cell 300.

[0047] Preferably, there are multiple UV curing devices 100, which are arranged side by side along the short axis direction of the ellipse and are all arranged above the transmission device 200. In the process of the transmission device 200 conveying the battery cell 300, the battery cell 300 passes through the multiple UV curing devices 100 in turn, and the multiple UV curing devices 100 perform UV curing on the battery cell 300 in turn to ensure the curing effect.

[0048] Preferably, there are multiple battery cells 300, and the transmission device 200 can synchronously drive the multiple battery cells 300 to advance forward, so that the multiple battery cells 300 pass through multiple UV curing devices 100 in sequence, thereby realizing continuous UV curing of the multiple battery cells 300 and further improving the curing efficiency.

[0049] In this embodiment, the transmission device 200 is a belt transmission structure, which uses a UV-resistant belt to avoid damage under long-term UV exposure. Specifically, the transmission device 200 is extended in the horizontal direction, and the opening 111 of the reflective lampshade 110 is vertically downward, that is, the long axis of the ellipse formed by the semi-elliptical mirror image of the reflective lampshade 110 is on the vertical line, and the short axis is on the horizontal line, so as to ensure the stability of the feeding of the battery cell 300 and the uniformity of UV curing.

[0050] The ultraviolet curing device 100 provided in the embodiment of the present invention reflects the ultraviolet light emitted by the mercury lamp 120 through the semi-elliptical reflective lampshade 110, so that the ultraviolet light energy is concentrated on the battery cell 300, thereby increasing the light energy density, shortening the curing time, increasing the curing efficiency, ensuring the curing effect, and increasing the production capacity. In addition, the high light energy density means that the light intensity per unit area of ​​the battery cell 300 is higher, which can make the photoinitiator in the ultraviolet insulating glue generate active free radicals faster, thereby accelerating the polymerization reaction, and is suitable for scenes requiring rapid curing. At the same time, the hot air in the reflective lampshade 110 is quickly discharged through the exhaust mechanism 130, and the battery cell 300 is air-cooled through the air cooling mechanism 140, which effectively reduces the temperature of the battery cell 300, avoids damage to the passivation film layer, and ensures the quality of the battery cell 300. The continuous ultraviolet curing furnace 10 can realize the continuous curing of the battery cell 300, with high curing efficiency and good curing effect, and avoids high temperature damage to the battery cell 300.

[0051] Furthermore, by using the UV curing device 100 provided in the embodiment of the present invention, the UV curing time of the battery cell 300 is reduced from 60s in the prior art to 40s, effectively shortening the curing time and improving the curing efficiency, and the production yield of the battery cell 300 is increased from 95% in the prior art to 98%, effectively ensuring the curing effect and improving production capacity.

[0052] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A UV curing device, characterized in that: The reflective lampshade comprises a reflective lampshade, a mercury lamp, an exhaust mechanism and an air cooling mechanism. The cross section of the reflective lampshade is semi-elliptical. The ellipse formed by the semi-elliptical mirror image of the reflective lampshade has a first focus and a second focus. The first focus is located inside the reflective lampshade, and the second focus is located outside the reflective lampshade. The mercury lamp is installed in the reflective lampshade and is arranged at the first focus. The mercury lamp is used to perform ultraviolet curing on a battery cell arranged near the second focus. The exhaust mechanism is installed at one end of the reflective lampshade away from the battery cell, and is used to extract the air in the reflective lampshade. The air cooling mechanism is arranged outside the reflective lampshade, and is used to air cool the battery cell.

2. The ultraviolet curing device according to claim 1, characterized in that: The cross section of the mercury lamp is circular, and the center of the circle of the mercury lamp is the first focus.

3. The ultraviolet curing device according to claim 1, characterized in that: The length of the major axis of the ellipse is 5cm-40cm; And / or, the minor axis length of the ellipse is 3cm-15cm.

4. The ultraviolet curing device according to claim 1, characterized in that: The reflective lampshade has an opening, the position of the opening corresponds to the position of the battery cell, and the battery cell is arranged parallel to the plane where the opening is located and spaced apart.

5. The ultraviolet curing device according to claim 4, characterized in that: The distance between the battery cell and the second focus is 0-a / 4, wherein a is the length of the major axis of the ellipse.

6. The ultraviolet curing device according to claim 1, characterized in that: The exhaust mechanism comprises an exhaust pump and an exhaust pipe. The reflective lampshade is provided with an exhaust port. One end of the exhaust pump is connected to the exhaust port, and the other end is connected to the exhaust pipe.

7. The ultraviolet curing device according to claim 1, characterized in that: The air cooling mechanism includes an air outlet pump, a refrigerator and an air outlet pipe. The air outlet pump is connected to the air outlet pipe through the refrigerator. The air outlet pipe is arranged side by side with the reflective lampshade. The side wall of the air outlet pipe is provided with multiple air outlets, and the air outlets are used to guide the outlet air flow to the battery cell.

8. The ultraviolet curing device according to claim 7, characterized in that: The number of the air outlet pipes is two, and the two air outlet pipes are arranged oppositely on two sides of the reflective lampshade.

9. The ultraviolet curing device according to claim 7, characterized in that: The diameter of the air outlet is 1mm-5mm; And / or, the ratio of the cross-sectional area of ​​the air outlet pipe to the total area of ​​the plurality of air outlets is 1-5.

10. The ultraviolet curing device according to claim 7, characterized in that: A preset angle is formed between the air outlet direction and the minor axis of the ellipse, and the preset angle is 20°-80°; And / or, the distance between the air outlet pipe and the battery cell is 1 cm-15 cm.

11. A continuous UV curing oven, characterized in that: It comprises a transmission device and the ultraviolet curing device according to any one of claims 1 to 10, wherein the transmission device is arranged below the ultraviolet curing device at intervals, and the transmission device is used to transport the battery cell.

12. The continuous UV curing oven according to claim 11, characterized in that: There are multiple ultraviolet curing devices, and the multiple ultraviolet curing devices are arranged side by side along the short axis direction of the ellipse.

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