Explosion-proof infrared drying oven for anode coating

Abstract

The utility model relates to an anti-explosion infrared drying oven for positive electrode coating, and belongs to the technical field of battery production, the anti-explosion infrared drying oven for positive electrode coating comprises an oven body, a first fan, a driving roller device, a ship body, a plurality of infrared lamp devices and a fresh air pipeline, the driving roller device conveys pole pieces between an inlet and an outlet of the oven body, the ship body is arranged above the transmission roller device, the infrared lamp device is arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate define a sealed space, and the infrared lamp tube is arranged in the sealed space. According to the anti-explosion infrared drying oven for positive electrode coating, the high-temperature infrared lamp tube can be prevented from making contact with NMP gas generated by drying a pole piece, the independent fresh air pipeline is further arranged in the oven body to cool the infrared lamp tube, the temperature of the infrared lamp device is reduced, and the possibility of explosion is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery production, in particular to a positive electrode coating explosion-proof infrared drying oven. BACKGROUND

[0002] In the preparation process of the positive electrode sheet of a lithium battery, a wet coating process is used to uniformly coat the prepared slurry on the surface of the electrode sheet, and then the electrode sheet is sent into an oven for drying. The drying of the electrode sheet is one of the key links in the preparation of the electrode sheet of the lithium battery, and directly affects the processing quality of the electrode sheet. At present, the commonly used heating methods for the oven of the coating machine mainly include hot air heating, infrared heating, hot press coating machine and microwave heating, among which the infrared heating is widely concerned due to its high heating efficiency, fast temperature rise, energy saving and environmental protection and other advantages.

[0003] However, in the actual operation process of the existing coating machine, especially the positive electrode coating machine, the infrared heating module has certain safety hazards. After the positive electrode sheet is coated, the electrode sheet containing NMP solvent enters the oven for drying. In the drying process, the NMP solvent will volatilize and may accumulate in the oven. If the ventilation in the oven is poor or the exhaust system fails, the NMP concentration may reach the explosion limit, thereby causing explosion at high temperature. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a positive electrode coating explosion-proof infrared drying oven to solve the technical problem that the existing infrared heating drying of the positive electrode sheet of a battery is prone to explosion.

[0005] To achieve the above-mentioned purpose, the application provides a positive electrode coating explosion-proof infrared drying oven, which comprises:

[0006] A box body is provided with an inlet and an outlet at two ends in the horizontal direction, and an air inlet and an air outlet are further provided on the box body;

[0007] A first fan is arranged at the air inlet;

[0008] A transmission roller device is arranged between the inlet and the outlet, and the transmission roller device is used for conveying the electrode sheet;

[0009] A ship body is arranged above the transmission roller device, the ship body is communicated with the air inlet, and the ship body is provided with a nozzle pointing to the transmission roller device;

[0010] A plurality of infrared lamp devices are arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate form a sealed space, and the infrared lamp tube is arranged in the sealed space; and

[0011] The fresh air pipeline comprises an air inlet pipeline, an air outlet pipeline and a second fan, the air inlet pipeline and the air outlet pipeline are communicated with two ends of each lampshade respectively, the port of the air inlet pipeline away from the lampshade is in the external environment, the second fan is arranged on the air inlet pipeline or the air outlet pipeline, and the second fan is used to make fresh air in the external environment flow through the infrared lamp device.

[0012] Optionally, the port of the air outlet pipeline away from the lampshade is in the external environment or is communicated with the air inlet.

[0013] Optionally, the box body is provided with an explosion-proof pressure relief port.

[0014] Optionally, the positive electrode coating explosion-proof infrared drying oven further comprises a blowing device arranged below the transmission roller device, the blowing device is communicated with the air inlet, and the blowing device is provided with a blowing nozzle pointing to the transmission roller device.

[0015] Optionally, the positive electrode coating explosion-proof infrared drying oven further comprises a plurality of return air pipelines, one end of the return air pipeline is communicated with the air outlet, and the other end of the return air pipeline extends above the transmission roller device.

[0016] Optionally, the return air pipeline is provided with a return air seat at the port close to the transmission roller device.

[0017] Optionally, the infrared lamp device further comprises a partition plate arranged in the lampshade, the partition plate divides the sealed space into an upper cavity and a lower cavity, the infrared lamp tube is arranged in the lower cavity, the air inlet pipeline is communicated with the upper cavity, the air outlet pipeline is communicated with the lower cavity, a plurality of air vents are arranged on the partition plate, the diameter of the air vents gradually increases from the air inlet pipeline to the air outlet pipeline.

[0018] Optionally, the positive electrode coating explosion-proof infrared drying oven further comprises an NMP concentration sensor arranged in the box body.

[0019] Optionally, the positive electrode coating explosion-proof infrared drying oven further comprises a temperature sensor arranged in the box body.

[0020] Optionally, the positive electrode coating explosion-proof infrared drying oven further comprises an air volume sensor arranged at the air outlet.

[0021] The positive electrode coating explosion-proof infrared drying oven provided by the application has the beneficial effects that, compared with the prior art, the positive electrode coating explosion-proof infrared drying oven comprises a box body, a first fan, a transmission roller device, a ship body, a plurality of infrared lamp devices and a fresh air pipeline, the transmission roller device transports the pole piece between the inlet and the outlet of the box body, the ship body is arranged above the transmission roller device, the infrared lamp device is arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate enclose a sealed space, and the infrared lamp tube is arranged in the sealed space, so that the high-temperature infrared lamp tube is prevented from contacting the NMP gas generated by drying of the pole piece, and the possibility of explosion is reduced; and the independent fresh air pipeline arranged in the box body is used to cool the infrared lamp tube, the temperature of the infrared lamp device is reduced, and the possibility of explosion is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Fig. 1 The positive electrode coating explosion-proof infrared drying oven provided by the application has the beneficial effects that, compared with the prior art, the positive electrode coating explosion-proof infrared drying oven comprises a box body, a first fan, a transmission roller device, a ship body, a plurality of infrared lamp devices and a fresh air pipeline, the transmission roller device transports the pole piece between the inlet and the outlet of the box body, the ship body is arranged above the transmission roller device, the infrared lamp device is arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate enclose a sealed space, and the infrared lamp tube is arranged in the sealed space, so that the high-temperature infrared lamp tube is prevented from contacting the NMP gas generated by drying of the pole piece, and the possibility of explosion is reduced; and the independent fresh air pipeline arranged in the box body is used to cool the infrared lamp tube, the temperature of the infrared lamp device is reduced, and the possibility of explosion is reduced.

[0024] Fig. 2 The positive electrode coating explosion-proof infrared drying oven provided by the application has the beneficial effects that, compared with the prior art, the positive electrode coating explosion-proof infrared drying oven comprises a box body, a first fan, a transmission roller device, a ship body, a plurality of infrared lamp devices and a fresh air pipeline, the transmission roller device transports the pole piece between the inlet and the outlet of the box body, the ship body is arranged above the transmission roller device, the infrared lamp device is arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate enclose a sealed space, and the infrared lamp tube is arranged in the sealed space, so that the high-temperature infrared lamp tube is prevented from contacting the NMP gas generated by drying of the pole piece, and the possibility of explosion is reduced; and the independent fresh air pipeline arranged in the box body is used to cool the infrared lamp tube, the temperature of the infrared lamp device is reduced, and the possibility of explosion is reduced.

[0025] Fig. 3 The positive electrode coating explosion-proof infrared drying oven provided by the application has the beneficial effects that, compared with the prior art, the positive electrode coating explosion-proof infrared drying oven comprises a box body, a first fan, a transmission roller device, a ship body, a plurality of infrared lamp devices and a fresh air pipeline, the transmission roller device transports the pole piece between the inlet and the outlet of the box body, the ship body is arranged above the transmission roller device, the infrared lamp device is arranged between the ship body and the transmission roller device, the infrared lamp device comprises a lampshade, a glass plate and an infrared lamp tube, the lampshade and the glass plate enclose a sealed space, and the infrared lamp tube is arranged in the sealed space, so that the high-temperature infrared lamp tube is prevented from contacting the NMP gas generated by drying of the pole piece, and the possibility of explosion is reduced; and the independent fresh air pipeline arranged in the box body is used to cool the infrared lamp tube, the temperature of the infrared lamp device is reduced, and the possibility of explosion is reduced.

[0026] EXPLANATION OF REFERENCE NUMERALS:

[0027] 1, box body; 110, inlet; 120, outlet; 130, explosion-proof pressure relief port; 2, first fan; 3, transmission roller device; 4, ship body; 5, infrared lamp device; 510, lampshade; 520, glass plate; 530, infrared lamp tube; 540, partition; 541, ventilation hole; 550, sealed space; 551, upper cavity; 552, lower cavity; 6, fresh air pipeline; 610, air inlet pipeline; 620, air outlet pipeline; 630, second fan; 7, air blowing device; 8, air return pipeline; 9, air return seat; 10, NMP concentration sensor; 11, temperature sensor; 12, pole piece. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more clear and understandable, the detailed description of the embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways from what is described herein, and with many different combinations of elements, and the present application is not limited to the embodiments described below, and can be practiced with modifications and alterations within the scope of the present application, which are apparent to those skilled in the art.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0031] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0033] It is to be understood that when an element as a preamble is referred to as being "on" or "disposed on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar terms as used herein are for the purpose of description only and are not intended to limit the present embodiments.

[0034] The embodiment of the present application provides a positive electrode coating explosion-proof infrared drying oven, please refer to Figs. 1 to 3 The positive electrode coating explosion-proof infrared drying oven comprises a box body 1, a first fan 2, a transmission roller device 3, a ship body 4, a plurality of infrared lamp devices 5 and a fresh air pipeline 6, the box body 1 is provided with an inlet 110 and an outlet 120 at two ends in the horizontal direction respectively, the box body 1 is further provided with an air inlet and an air outlet, the first fan 2 is arranged at the air inlet; the transmission roller device 3 is arranged between the inlet 110 and the outlet 120, and the transmission roller device 3 is used for conveying an electrode piece 12; the ship body 4 is arranged above the transmission roller device 3, the ship body 4 is communicated with the air inlet, and the ship body 4 is provided with a snout pointing to the transmission roller device 3; the plurality of infrared lamp devices 5 are arranged between the ship body 4 and the transmission roller device 3, the infrared lamp device 5 comprises a lampshade 510, a glass plate 520 and an infrared lamp tube 530, the lampshade 510 and the glass plate 520 enclose a sealed space 550, and the infrared lamp tube 530 is arranged in the sealed space 550; the fresh air pipeline 6 comprises an air inlet pipeline 610, an air outlet pipeline 620 and a second fan 630, the air inlet pipeline 610 and the air outlet pipeline 620 are communicated with two ends of each lampshade 510 respectively, the port of the air inlet pipeline 610 away from the lampshade 510 is in an external environment, the second fan 630 is arranged on the air inlet pipeline 610 or the air outlet pipeline 620, and the second fan 630 is used for making fresh air in the external environment flow through the infrared lamp device 5.

[0035] In the embodiment, the positive electrode coating explosion-proof infrared drying oven comprises a box body 1, a first fan 2, a transmission roller device 3, a ship body 4, a plurality of infrared lamp devices 5 and a fresh air pipeline 6. The transmission roller device 3 is arranged between the inlet 110 and the outlet 120 of the box body 1 to convey the pole piece 12. The ship body 4 is arranged above the transmission roller device 3. The infrared lamp device 5 is arranged between the ship body 4 and the transmission roller device 3. The infrared lamp device 5 comprises a lamp shade 510, a glass plate 520 and an infrared lamp tube 530. The lamp shade 510 and the glass plate 520 form a sealed space 550. The infrared lamp tube 530 is arranged in the sealed space 550 to avoid the contact between the high-temperature infrared lamp tube 530 and the NMP gas generated by the drying of the pole piece 12, thereby reducing the possibility of explosion. An independent fresh air pipeline 6 is arranged in the box body 1 to cool the infrared lamp tube 530 and reduce the temperature of the infrared lamp device 5, thereby reducing the possibility of explosion.

[0036] In one embodiment, the end of the air outlet pipeline 620 away from the port of the lamp shade 510 is in the external environment or is communicated with the air inlet to realize hot air circulation and reduce the overall energy consumption.

[0037] In one embodiment, as shown in Fig. 1 , the box body 1 is provided with an explosion-proof pressure relief port 130 to timely discharge the high-pressure gas and ensure the safety of operation.

[0038] In one embodiment, as shown in Fig. 2 , the positive electrode coating explosion-proof infrared drying oven further comprises a blowing device 7 arranged below the transmission roller device 3. The blowing device 7 is communicated with the air inlet. The blowing device 7 is provided with a nozzle pointing to the transmission roller device 3.

[0039] In this way, the blowing device 7 is arranged at the bottom of the pole piece 12 to make the heating of the pole piece 12 more uniform, avoid local overheating or uneven drying, and avoid the accumulation of gas at the bottom to reduce the possibility of explosion.

[0040] Optionally, the blowing device 7 and the ship body 4 both adopt the air inlet to supply air in the present case. In other embodiments, the blowing device 7 can also be provided with a separate air port to control the air volume.

[0041] In one embodiment, as shown in Fig. 2 , the positive electrode coating explosion-proof infrared drying oven further comprises a plurality of return air pipelines 8. One end of the return air pipeline 8 is communicated with the air outlet. The other end of the return air pipeline 8 extends above the transmission roller device 3.

[0042] Specifically, the return air pipeline 8 is arranged near each infrared lamp device 5. Generally, the NMP concentration near the infrared lamp device 5 is the highest. The return air pipeline 8 can timely extract the NMP gas from the box body 1 to avoid the accumulation of NMP gas and reduce the possibility of explosion.

[0043] In one embodiment, please refer to Fig. 2 The return air pipeline 8 is provided with a return air seat 9 near the port of the transmission roller device 3, which can improve the uniformity of the return air.

[0044] In one embodiment, please refer to Fig. 3 The infrared lamp device 5 further comprises a baffle 540 arranged in the lampshade 510, which divides the sealed space 550 into an upper cavity 551 and a lower cavity 552, and the infrared lamp tube 530 is arranged in the lower cavity 552, the air inlet pipeline 610 is communicated with the upper cavity 551, and the air outlet pipeline 620 is communicated with the lower cavity 552. A plurality of air vents 541 are arranged on the baffle 540, the fresh air enters from above the baffle 540 on one side of the air inlet pipeline 610, flows through the air vents 541 on the baffle 540 to the surface of the infrared lamp tube 530, and then flows out from the air outlet pipeline 620 on the other side after cooling the surface of the infrared lamp tube 530.

[0045] Further, the closer to the air inlet pipeline 610 in the upper cavity 551, the faster the flow rate of the fresh air. The diameter of the air vent 541 gradually increases from the air inlet pipeline 610 to the air outlet pipeline 620, which can ensure that the flow rates of the air vents 541 are approximately the same, so that the temperature drop of the infrared lamp tube 530 is relatively uniform, and the uniformity of the surface temperature of the infrared lamp tube 530 is ensured.

[0046] In one embodiment, please refer to Fig. 2 The positive electrode coating explosion-proof infrared drying oven further comprises an NMP concentration sensor 10 arranged in the box body 1.

[0047] Specifically, the NMP concentration sensor 10 is arranged below the hull 4 and above the pole piece 12, and is used for detecting the NMP concentration in the box body 1.

[0048] In one embodiment, please refer to Fig. 2 The positive electrode coating explosion-proof infrared drying oven further comprises a temperature sensor 11 arranged in the box body 1.

[0049] Specifically, the temperature sensor 11 is also arranged below the hull 4 and above the pole piece 12, and is arranged close to the infrared lamp device 5, and is used for monitoring the surface temperature of the pole piece 12 and the environmental temperature in the box body 1.

[0050] In one embodiment, the positive electrode coating explosion-proof infrared drying oven further comprises an air volume sensor arranged at the air outlet.

[0051] Specifically, the air volume sensor is arranged at the air outlet of the box body 1, and by setting the minimum air volume of the air volume sensor, the air volume in the box body 1 or the abnormality of the fan can be monitored.

[0052] Further, the NMP concentration sensor 10, the temperature sensor 11 and the air volume sensor can be provided with two or more groups at different positions, so as to avoid the situation that the monitoring is lost due to the abnormality of a single sensor, and to achieve the effect of monitoring multiple positions.

[0053] Preferably, the positive electrode coating explosion-proof infrared drying oven further comprises a control device, which is respectively connected in communication with the first fan 2, the infrared lamp device 5, the second fan 630, the NMP concentration sensor 10, the temperature sensor 11 and the air volume sensor, and the control device adaptively changes the working parameters of the first fan 2, the infrared lamp device 5 and the second fan 630 according to the monitoring data of the NMP concentration sensor 10, the temperature sensor 11 and the air volume sensor, so as to achieve the effect of automatically regulating the NMP concentration, the drying temperature and the air volume in the oven.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0055] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A positive electrode coating explosion-proof infrared drying oven characterized by, The positive electrode coating explosion-proof infrared drying oven comprises a box body, a first fan, a transmission roller device, a ship body, a plurality of infrared lamp devices, and a fresh air pipeline. The box body is provided with an inlet and an outlet at two ends in the horizontal direction, and is further provided with an air inlet and an air outlet. The first fan is arranged at the air inlet. The transmission roller device is arranged between the inlet and the outlet and is used for conveying the pole piece. The ship body is arranged above the transmission roller device and is connected to the air inlet. The ship body is provided with a snout pointing to the transmission roller device. The plurality of infrared lamp devices are arranged between the ship body and the transmission roller device.

2. The positive electrode coated explosion-proof infrared drying oven according to claim 1, characterized in that, Each lamp shade is connected with the air inlet and the air outlet at both ends.

3. The positive electrode coated explosion-proof infrared drying oven according to claim 1, characterized in that, The end of the air outlet away from the lamp shade is in the external environment or connected to the air inlet.

4. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, The box body is provided with an explosion-proof pressure relief port.

5. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, The positive electrode coating explosion-proof infrared drying oven further comprises a blowing device arranged below the transmission roller device.

6. The positive electrode coated explosion-proof infrared drying oven according to claim 5, characterized in that, The blowing device is connected to the air inlet and is provided with a snout pointing to the transmission roller device.

7. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, The positive electrode coating explosion-proof infrared drying oven further comprises a plurality of return air pipelines.

8. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, One end of the return air pipeline is connected to the air outlet, and the other end of the return air pipeline extends above the transmission roller device.

9. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, The return air pipeline is provided with a return air seat at the port close to the transmission roller device.

10. The positive electrode coated explosion-proof infrared drying oven according to any one of claims 1-3, characterized in that, The infrared lamp device further comprises a partition plate arranged in the lamp shade. The partition plate divides the sealed space into an upper cavity and a lower cavity. The infrared lamp tube is arranged in the lower cavity. The air inlet is connected to the upper cavity, and the air outlet is connected to the lower cavity. The partition plate is provided with a plurality of air vents. The diameter of the air vent gradually increases from the air inlet to the air outlet. The positive electrode coating explosion-proof infrared drying oven further comprises an NMP concentration sensor arranged in the box body. The positive electrode coating explosion-proof infrared drying oven further comprises a temperature sensor arranged in the box body. The positive electrode coating explosion-proof infrared drying oven further comprises an air volume sensor arranged at the air outlet.

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