Lithium battery pole piece baking oven
By designing a lithium battery pole oven using high-efficiency heating device, ceramic fiber insulation cotton and heat-resistant flame-retardant silicone parts, the problems of slow temperature reduction and poor thermal insulation performance in the prior art are solved, and efficient baking and safe operation are achieved.
Patent Information
- Application Number
- CN202421366299.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing lithium battery electrode baking oven has too slow temperature reduction speed and poor thermal insulation performance, resulting in poor thermal recycling rate, increasing energy consumption cost, and risk of burning equipment operators and pole strips.
A lithium battery pole oven including a box, box door, heating device and circulation device is designed. It adopts 100K ceramic fiber insulation cotton and heat-resistant flame-retardant silicone parts, and a temperature sensor and an over-temperature temperature sensor are set to form a loop circulation structure and an adjustable air guide plate to improve heating efficiency and temperature uniformity.
It improves the baking efficiency of lithium battery pole pieces, shortens drying time, enhances heat insulation performance, reduces energy consumption costs, and reduces the risk of scalds and the possibility of extreme pieces of tape for equipment operators.
Smart Images
Figure CN222544241U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lithium ion battery preparation, and in particular to a lithium battery pole piece baking oven. Background Art
[0002] In recent years, with the rapid development of the lithium battery industry, the safety performance of lithium batteries has also received widespread attention from people around the world. As the core part of lithium battery cells, the quality of lithium battery pole pieces directly determines the safety performance and life cycle of lithium batteries. How to ensure the quality of lithium battery pole pieces has become extremely important. Baking lithium battery pole pieces is one of the important processes to ensure the quality of lithium battery pole pieces. Most lithium battery manufacturers use baking ovens to bake pole pieces.
[0003] At present, the lithium battery electrode baking ovens commonly used in the industry have too slow heating and cooling speeds and poor thermal insulation performance. During use, the external temperature often exceeds 60°C, and a large amount of heat is dissipated to the outside, resulting in poor thermal cycle utilization and increased energy consumption costs. In addition, there is a problem that the electrodes outside the baking oven that are close to the baking oven and the rollers that transport the electrodes are too hot. Therefore, there is also the risk of scalding the equipment operators and the electrode tape breaking in the foil area. Utility Model Content
[0004] The present disclosure is completed in view of the above-mentioned existing problems, and its purpose is to provide a lithium battery pole piece baking oven that can improve the baking efficiency of lithium battery pole pieces and shorten the drying time. The lithium battery pole piece baking oven not only fully solves the problems of slow heating and cooling speed inside the baking oven and uneven internal temperature, but also solves the problems of poor thermal insulation performance, pole pieces close to the baking oven, and hot rollers for conveying pole pieces.
[0005] The first aspect of the present disclosure is characterized in that the lithium battery pole piece baking oven is:
[0006] The lithium battery pole piece baking oven comprises a box body, a box door, a heating device and a circulation device.
[0007] The box body is formed by an outer box body and an inner box body.
[0008] The box door is arranged on the front side of the box body.
[0009] The heating device and the circulation device are arranged in parallel at the rear side of the outer box.
[0010] A pole piece inlet is provided on the upper surface of the outer box body, and a pole piece outlet is provided on the lower surface of the outer box body.
[0011] Plate components are respectively provided on both sides of the pole piece inlet and / or the pole piece outlet, and the plate components are fixed to the upper surface and / or the lower surface of the outer box through oblong holes in a manner capable of adjusting the size of the pole piece inlet and / or the pole piece outlet.
[0012] The second embodiment of the lithium battery pole piece baking oven disclosed in the present invention is based on the first embodiment and is characterized in that:
[0013] The left and right sides of the rear wall of the box body are respectively provided with an air supply port and an air outlet, and a loop circulation structure is formed through the air supply port and the air outlet.
[0014] The third embodiment of the lithium battery pole piece baking oven disclosed in the present invention is based on the second embodiment, and is characterized in that:
[0015] The box body is provided with an internal wind guide plate for guiding the wind in the box body, and the direction of the internal wind guide plate can be adjusted.
[0016] The fourth aspect of the lithium battery pole piece baking oven of the present disclosure is based on any one of the first to third aspects, and is characterized in that:
[0017] 100K ceramic fiber thermal insulation cotton is arranged inside the box body, and the thickness of the thermal insulation layer formed by the 100K ceramic fiber thermal insulation cotton is more than 100 mm.
[0018] The fifth aspect of the lithium battery pole piece baking oven of the present disclosure is based on any one of the first to third aspects, and is characterized in that:
[0019] A heat-resistant and flame-retardant silicone member is provided at the connection between the outer box body and the box door.
[0020] The sixth aspect of the lithium battery pole piece baking oven of the present disclosure is based on any one of the first to third aspects, and is characterized in that:
[0021] The lithium battery pole piece baking oven has a control unit, which controls the start and stop of the heating device.
[0022] The heating device is a heating device that uses stainless steel resistance wire for heating.
[0023] The heating device is provided with an over-temperature sensor.
[0024] The seventh aspect of the lithium battery pole piece baking oven of the present disclosure is based on any one of the first to third aspects, and is characterized in that:
[0025] The lithium battery pole piece baking oven has a control unit, which controls the start and stop of a centrifugal fan arranged at the rear of the lithium battery pole piece baking oven.
[0026] The eighth aspect of the present disclosure is a lithium battery pole piece baking oven based on any one of the first to third aspects, characterized in that:
[0027] The outer box body and the inner box body are formed by bending and welding sheet metal parts, and the welding parts are polished and brushed.
[0028] The ninth aspect of the lithium battery pole piece baking oven of the present disclosure is based on any one of the first to third aspects, and is characterized in that:
[0029] A temperature sensor is arranged inside the box.
[0030] Utility Model Effect
[0031] According to the first mode of the lithium battery electrode baking oven, since the electrode inlet and / or outlet of the baking oven outer box body is designed as an adjustable stainless steel plate, the size of the electrode inlet and / or outlet can be adjusted. Therefore, the baking oven electrode inlet and / or outlet can be reduced as much as possible according to the usage conditions to avoid too much heat loss through the box body inlet and outlet during the heating process, and fully solve the problem of the electrode outside the baking oven that is close to the baking oven and the rollers that transport the electrode being hot.
[0032] According to the structure of the second mode, since the air path structure inside the box body adopts left-right convection to smoothly transport air to form a circulation structure, the temperature inside the baking oven is evenly distributed.
[0033] According to the structure of the third embodiment, since the internal air guide plate is designed to be adjustable, it is possible to fully ensure that the overall internal temperature is evenly distributed.
[0034] According to the structure of the fourth method, since the internal insulation material of the box is 100K ceramic fiber insulation cotton, the thickness of the insulation layer formed by the ceramic insulation cotton is more than 100 mm, so that the thermal insulation performance of the entire box is better. During use, the external temperature can be controlled within 60°C to prevent scalding of equipment operators.
[0035] According to the structure of the fifth embodiment, since a heat-resistant and flame-retardant silicone component is provided at the connection between the box door and the interior of the box body, it is beneficial to keep the box body warm and avoid friction caused by direct contact between metals.
[0036] According to the structure of the sixth method, since the heating device uses a stainless steel resistance wire and an over-temperature sensor is arranged inside, efficient heating can be performed, and over-temperature will immediately cut off the power and give a feedback signal to the control unit, so that the equipment operator can understand the situation and solve the problem in time, thereby improving safety performance.
[0037] According to the structure of the seventh method, since the control unit of the baking oven controls the start and stop of the centrifugal fan arranged at the rear of the lithium battery electrode baking oven, any failure in the circulation system during use will be quickly reflected to the equipment operator, and the equipment operator can obtain feedback in time to solve the corresponding failure.
[0038] According to the structure of the eighth aspect, since the outer box and the inner box are formed by bending and welding sheet metal parts, and the welded parts are polished and brushed, the appearance of the box can be improved.
[0039] According to the configuration of the ninth aspect, since the temperature sensor is provided inside the housing, the temperature inside the housing can be accurately grasped and appropriate control can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 It is a three-dimensional diagram of the lithium battery pole piece baking oven disclosed in the present invention.
[0041] Figure 2 (a) is the main perspective view of the box. Figure 2 (b) is a top view of the box. Figure 2 (c) is an enlarged view of the pole piece entrance.
[0042] Figure 3 (a) is a three-dimensional diagram of the circulation device and the heating device. Figure 3 (b) is a schematic diagram showing the internal structure of the heating device.
[0043] Description of reference numerals:
[0044] 1: Lithium battery pole piece baking oven; 2: Box body; 3: Outer box body; 4: Inner box body; 5: Box door; 6: Heating device; 7: Circulation device; 8: Pole piece entrance; 9: Plate member; 10: Oblong hole; 11: Screw; 12: Air supply port; 13: Air outlet; 14: Temperature sensor; 15: Roller; 16: Handle; 17: Hydrogen spring; 18: Heat-resistant and flame-retardant silicone parts; 19: Box adjustment block; 20: Air guide plate; 22 Exhaust port; 23: Exhaust fan; 24: Over-temperature sensor; 25: Stainless steel resistance wire; 27: Roller ceramic pad. DETAILED DESCRIPTION
[0045] Hereinafter, the structures and functions of the various parts of the present disclosure will be described in detail with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, the accompanying drawings are for illustration purposes only and are not drawn to scale. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.
[0046] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "having" and "having" used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.
[0047] The lithium battery pole piece baking oven disclosed in the present invention is used to bake the lithium battery pole pieces. Figure 1 As shown, the lithium battery pole piece baking oven 1 of the present disclosure comprises a box body 2, a box door 5, a heating device 6 and a circulation device 7. The heating device 6 and the circulation device 7 are arranged on the rear side of the box body 2.
[0048] The box body 2 is formed by an outer box body 3 and an inner box body 4. The outer box body 3 is made of stainless steel sheet metal, formed by bending and welding, and the welding part is polished and brushed, and the brushed lines are made consistent to ensure a good appearance. A pole piece inlet 8 is opened on the upper surface of the outer box body 3, such as Figure 2 As shown in (b) and (c), plate members 9 with oblong holes are respectively provided on both sides of the pole piece inlet 8, and the plate members 9 are fixed to the upper surface of the outer box body via screws 11 through oblong holes 10 in a manner that the size of the pole piece inlet 8 can be adjusted. Thus, the size of the pole piece inlet 8 can be adjusted by adjusting the distance between the two plate members 9. A pole piece outlet (not shown) is provided on the lower surface of the outer box body 3, and the pole piece outlet structure is the same as the pole piece inlet structure. And, as Figure 2 As shown in (a), a roller 15 for carrying and conveying the pole piece entering from the pole piece inlet 8 into the box 2 is arranged on the rear wall of the box 2. A roller ceramic pad 27 is extended and arranged at the rear of the box. In addition, a box adjustment block 19 for adjusting the box is arranged at the rear of the box.
[0049] The material and processing method of the inner box 4 are the same as those of the outer box 3. The internal wind path structure of the box 2 adopts left-right convection to transport wind smoothly. Figure 2As shown in (a), air supply ports 12 and air outlets 13 are respectively provided on the left and right sides of the rear wall of the box 2, with air supply on the left side and return on the right side, forming a loop circulation structure, and the number of cycles in the box is 2 times / min. In addition, an internal air guide plate 20 is provided in the box 2 to guide the air in the box 2, and the direction of the internal air guide plate 20 can be adjusted, so as to fully ensure that the overall temperature distribution inside the box is uniform. And, as shown in FIG. Figure 2 As shown in (a) and (b), the rear wall of the box body 2 is provided with an exhaust port 22 and an exhaust fan 23.
[0050] In one embodiment, the internal insulation material of the box body 2 is 100K ceramic fiber insulation cotton, and the thickness of the insulation layer formed by the ceramic fiber insulation cotton is more than 100 mm, preferably 120 mm, to ensure that when the operating temperature of the box body is 150°C, the surface temperature of the box body except for the edge of the inlet and outlet is ≤50°C, and the temperature of the metal joints such as the door frame and hinges is ≤60°C. A temperature sensor 14 is also provided inside the box body 2 to monitor the internal temperature of the box body. The box door 5 is a liftable door, with nitrogen springs 17 on both sides, and the handle 16 is a rotating and clamping handle, which is conducive to the rapid opening and closing of the box door. Heat-resistant and flame-retardant silicone parts 18 are provided at the connection between the box door 5 and the inside of the box body 2, which is conducive to the insulation of the box body and avoids friction caused by direct contact between metals.
[0051] In one embodiment, if Figure 3 As shown in (a) and (b), the heating device 6 of the lithium battery pole piece baking oven 1 uses a stainless steel resistance wire 25 for efficient heating, and its start and stop are controlled by the control unit. An over-temperature temperature sensor 24 is arranged inside the heating device 6, which cuts off the power when over-temperature occurs and gives a feedback signal to the control unit. Among them, the heating method adopts contactless periodic pulse width modulation and balanced temperature control PID+SSR, and the heating time is increased from room temperature (25°C) to 150°C≤3min.
[0052] The circulation device 7 adopts a volute type circulation motor. When the conveying system fails during use, the exhaust fan 23 located at the rear of the box body 2 automatically opens, so that the internal temperature of the baking oven quickly drops to 80°C and maintains it until the failure is resolved and then rises to the set value of 150°C within 3 minutes.
[0053] The heating device 6 and the circulation device 7 of the baking box 1 heat and circulate the air in the baking box, so that the electrode is dried in the box.
[0054] The above is a description of the preferred embodiments shown in the present disclosure, but the present disclosure is not limited to the above embodiments, and various changes can certainly be implemented within the scope of the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments and / or technical solutions of the present disclosure can be combined and / or combined in various ways. All these combinations and / or combinations fall within the scope of the present disclosure.
[0055] Industrial Applicability
[0056] The lithium battery pole piece baking oven disclosed in the present invention can improve the baking efficiency of lithium battery pole pieces and shorten the drying time, and is suitable for baking lithium battery pole pieces.
Claims
1. A lithium battery pole piece baking oven, characterized in that: The lithium battery pole piece baking oven comprises a box body, a box door, a heating device and a circulation device. The box body is formed by an outer box body and an inner box body. The box door is arranged on the front side of the box body. The heating device and the circulation device are arranged in parallel at the rear side of the outer box. A pole piece inlet is provided on the upper surface of the outer box body, and a pole piece outlet is provided on the lower surface of the outer box body. Plate components are respectively provided on both sides of the pole piece inlet and / or the pole piece outlet, and the plate components are fixed to the upper surface and / or the lower surface of the outer box through oblong holes in a manner capable of adjusting the size of the pole piece inlet and / or the pole piece outlet.
2. The lithium battery pole piece baking oven according to claim 1, characterized in that: The left and right sides of the rear wall of the box body are respectively provided with an air supply port and an air outlet, and a loop circulation structure is formed through the air supply port and the air outlet.
3. The lithium battery pole piece baking oven according to claim 2, characterized in that: The box body is provided with an internal wind guide plate for guiding the wind in the box body, and the direction of the internal wind guide plate can be adjusted.
4. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: 100K ceramic fiber thermal insulation cotton is arranged inside the box body, and the thickness of the thermal insulation layer formed by the 100K ceramic fiber thermal insulation cotton is more than 100 mm.
5. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: A heat-resistant and flame-retardant silicone piece is arranged at the connection between the outer box body and the box door.
6. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: The lithium battery pole piece baking oven has a control unit, which controls the start and stop of the heating device. The heating device is a heating device that uses stainless steel resistance wire for heating. The heating device is provided with an over-temperature sensor.
7. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: The lithium battery pole piece baking oven has a control unit, which controls the start and stop of a centrifugal fan arranged at the rear of the lithium battery pole piece baking oven.
8. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: The outer box body and the inner box body are formed by bending and welding sheet metal parts, and the welding parts are polished and brushed.
9. The lithium battery pole piece baking oven according to any one of claims 1 to 3, characterized in that: A temperature sensor is arranged inside the box.