Pole piece drying device and pole piece production line
By designing a first heating element and a second heating element in the electrode drying device to dry both sides of the electrode, the problem of incompletely dried electrodes occupying drying equipment is solved, and the electrode coating efficiency is improved.
Patent Information
- Application Number
- CN202421571275.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-07-03
AI Technical Summary
In the existing technology, incompletely dried electrode sheets need to be put back into the drying equipment for further drying, which makes it impossible to carry out the subsequent electrode coating process and reduces the coating efficiency.
An electrode drying device was designed, comprising a first heating element and a second heating element inside a chamber. The electrode is dried through the channel between them. The first heating element and the second heating element are used to dry both sides of the electrode, respectively, thus avoiding the use of existing drying equipment.
This technology enables efficient re-drying of incompletely dried electrodes, avoiding impact on subsequent electrode coating processes and improving coating efficiency.
Smart Images
Figure CN223517891U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the production technical field of pole piece, concretely relates to a pole piece drying device and pole piece production line. BACKGROUND
[0002] Pole piece coating is an important link in the secondary battery manufacturing process. It refers to stirring the materials required by the positive or negative electrode according to the formula to form slurry, and uniformly coating on the current collector (aluminum foil, copper foil). It can improve the battery performance, ensure the electrode uniformity, control the electrode thickness, improve the safety of the battery, etc. The coating process includes continuous processes such as unwinding, splicing, pulling, tension control, automatic deviation correction, coating, drying, forming and winding.
[0003] In the existing coating process, the drying of the pole piece refers to removing the solvent in the slurry by hot air drying and other methods to form a solid stable active material layer adhered to the pole piece. The pole piece is often placed in a large drying equipment and hot air is introduced for drying. However, there may be incomplete drying during drying, which directly affects the performance of the subsequent battery.
[0004] For the pole piece that is not completely dried, the current processing method is to put the pole piece that is not completely dried into a large drying equipment again for drying. Because the drying equipment is occupied, the subsequent pole piece cannot be coated, which reduces the coating efficiency of the subsequent pole piece. UTILITY MODEL CONTENT
[0005] Therefore, the utility model provides a pole piece drying device and pole piece production line to solve the problem that the subsequent pole piece cannot be coated when the pole piece is put into the drying equipment again for drying, which reduces the coating efficiency of the subsequent pole piece.
[0006] In the first aspect, the utility model provides a pole piece drying device, which comprises a box body and first and second heating elements arranged in the box body. The first and second heating elements form a channel for the pole piece to pass through. The box body is provided with an inlet and an outlet for the pole piece to enter and exit, respectively.
[0007] Beneficial effects: the pole piece drying device provided by the utility model is used for drying the pole piece incompletely, the pole piece enters the box body from the entrance of the box body, the pole piece passes through the channel between the first heating piece and the second heating piece in the box body and then goes out of the box body from the entrance, in this way, as the pole piece is continuously pulled out from the pole piece roll, the pole piece continuously passes through the channel between the first heating piece and the second heating piece, in this process, the first heating piece and the second heating piece dry the first surface and the second surface of the pole piece respectively, so that the pole piece is dried to the required degree, and the pole piece goes out of the outlet after drying, in this way, when the pole piece incompletely dried is dried again, the original drying equipment does not need to be occupied, the coating process of the subsequent pole piece is not affected, and the coating efficiency of the subsequent pole piece is avoided from being affected.
[0008] As an optional implementation, the first heating piece and the second heating piece are provided as infrared lamps.
[0009] As an optional implementation, further comprising:
[0010] A first heating roller is provided outside the entrance, a third heating piece is arranged in the first heating roller, and the first heating roller is adapted for the first surface of the pole piece to pass through.
[0011] As an optional implementation, further comprising:
[0012] A second heating roller is provided on the side of the first heating roller away from the entrance, a fourth heating piece is arranged in the second heating roller, and the second heating roller is adapted for the second surface of the pole piece to pass through.
[0013] As an optional implementation, the first heating roller and the second heating roller are provided in plurality and at intervals along the extension direction of the pole piece.
[0014] As an optional implementation, further comprising:
[0015] A first transition roller is provided on the side of the second heating roller away from the entrance, and the first transition roller is adapted for the first surface of the pole piece to pass through;
[0016] A second transition roller is provided on the side of the first transition roller close to the entrance, and the second transition roller is adapted for the second surface of the pole piece to pass through.
[0017] As an optional implementation, further comprising:
[0018] A unwinding mechanism is provided outside the entrance, and the unwinding mechanism is adapted for laying the pole piece;
[0019] A winding mechanism is provided outside the outlet, and the winding mechanism is adapted for winding the pole piece.
[0020] As an optional implementation, further comprising:
[0021] A third transition roller is arranged on one side of the winding mechanism close to the outlet, and the third transition roller is suitable for the pole piece to pass through and access the winding mechanism.
[0022] As an optional implementation, further comprising:
[0023] A first deviation correction mechanism is arranged between the unwinding mechanism and the inlet, and the first deviation correction mechanism is suitable for the pole piece to pass through and correct the deviation of the pole piece.
[0024] A second deviation correction mechanism is arranged between the winding mechanism and the outlet, and the second deviation correction mechanism is suitable for the pole piece to pass through and correct the deviation of the pole piece.
[0025] In a second aspect, the utility model also provides a pole piece production line, comprising: drying device, suitable for drying pole piece, drying device is arranged as above any described pole piece drying device.
[0026] Beneficial effect: the utility model provides a pole piece production line, its beneficial effect is consistent with the effect brought by the pole piece drying device, therefore, it is no longer tedious. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.
[0028] Figure 1 It is a structure schematic view of a pole piece drying device of the utility model embodiment;
[0029] Figure 2 It is a box structure schematic view of a pole piece drying device of the utility model embodiment;
[0030] Figure 3 It is a schematic view of the first heating roller and the second heating roller of a pole piece drying device of the utility model embodiment.
[0031] EXPLANATION OF REFERENCE NUMERALS:
[0032] 1, box;2, inlet;3, outlet;4, first heating part;5, second heating part;6, first heating roller;7, second heating roller;8, first transition roller;9, second transition roller;10, third transition roller;11, unwinding mechanism;12, winding mechanism;13, first deviation correction mechanism;14, second deviation correction mechanism. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0034] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.
[0035] According to embodiments of the present invention, in one aspect, an electrode drying device is provided, such as... Figure 1 and Figure 2 As shown, it includes: a housing 1, a first heating element 4, and a second heating element 5. The first heating element 4 and the second heating element 5 are respectively disposed inside the housing 1. An inlet 2 and an outlet 3 are respectively opened on two opposite side walls of the housing 1. The first heating element 4 is disposed on the upper side inside the housing 1, and the second heating element 5 is disposed on the lower side inside the housing 1, thus forming a channel in the gap between the first heating element 4 and the second heating element 5.
[0036] For incompletely dried electrodes, after being pulled out of the electrode roll, the electrodes enter the chamber 1 through inlet 2. Inside the chamber 1, the electrodes pass through the channel between the first heating element 4 and the second heating element 5 and then exit the chamber 1 through inlet 2. Thus, as electrodes are continuously pulled out of the electrode roll, they continuously pass through the channel between the first heating element 4 and the second heating element 5. During this process, the first heating element 4 and the second heating element 5 dry the first and second sides of the electrodes respectively, thereby drying the electrodes to the required degree. The electrodes exiting through outlet 3 are then rolled up to form an electrode roll, completing the re-drying of the incompletely dried electrodes.
[0037] With this setup, when re-drying incompletely dried electrodes, there is no need to occupy the original drying equipment, and the coating process for subsequent electrodes is not affected, thus avoiding impacting the coating efficiency of subsequent electrodes.
[0038] In a further embodiment, a plurality of first heating members 4 and a plurality of second heating members 5 are respectively provided. The first heating members 4 and the second heating members 5 can be provided in three. The three first heating members 4 are arranged in sequence along the extension direction of the pole piece, and the three second heating members 5 are arranged in sequence along the extension direction of the pole piece. The gaps between the three first heating members 4 and the three second heating members 5 are combined to form a longer channel. The area in which the first heating members 4 and the second heating members 5 can dry the pole piece is increased. Based on this, the time for the pole piece to pass through the channel between the first heating members 4 and the second heating members 5 can be accelerated, and the drying effect can still be guaranteed, thereby improving the drying efficiency of the pole piece.
[0039] Moreover, based on the provision of the first heating members 4 and the second heating members 5, not only single-sided pole pieces can be adapted, but also double-sided pole pieces can be adapted.
[0040] In some embodiments, the first heating members 4 and the second heating members 5 are provided as infrared lamps. The infrared lamp is a lamp capable of emitting infrared light. After the first heating members 4 and the second heating members 5 are powered on, the first heating members 4 and the second heating members 5 emit infrared rays to generate radiation, thereby being capable of heating and drying the pole piece passing between them. Since infrared rays have high penetration and heating efficiency, the surface and the interior of an object can be heated at the same time, so the drying speed is fast. Infrared drying can avoid energy loss caused by heating a heat medium, so that the material can obtain the heat energy required for drying in a very short time, and the inside and outside act at the same time, more effectively and completely removing the bound water in the material, achieving a more ideal drying effect. During the infrared drying process, energy is directly converted into heat energy without intermediate links such as heat conduction and heat convection, so the energy utilization rate is high. Moreover, the infrared rays are well controllable, and the intensity and irradiation time of the infrared rays can be adjusted as needed.
[0041] As an optional embodiment, as shown in Figure 1 and Figure 3 The pole piece drying device further comprises a first heating roller 6. The first heating roller 6 is sleeved on the rotating shaft on the support frame, so that the first heating roller 6 can rotate around the rotating shaft. The first heating roller 6 is arranged outside the inlet 2. The first heating roller 6 can be made of stainless steel, and a cavity is arranged in the first heating roller 6. A third heating member is embedded in the cavity. The third heating member can be an electric heating rod. After the third heating member is powered on, the third heating member generates heat to increase the temperature of the first heating roller 6.
[0042] The two surfaces of the pole piece are respectively a first surface and a second surface. For the pole piece that is not completely dried, after the pole piece is pulled out from the pole piece roll, the pole piece is first wound around the first heating roller 6, at which time the first surface of the pole piece is in contact with the outer wall of the first heating roller 6. Then the pole piece is dried in the inside of the box 1 from the inlet 2 of the box 1. In this way, before the pole piece enters the inside of the box 1 for drying, the first heating roller 6 heats the pole piece to a certain temperature, achieving the effect of preheating. At this time, after the pole piece enters the inside of the box 1 from the inlet 2 of the box 1, the first heating member 4 and the second heating member 5 can more quickly heat the pole piece to a drying temperature. Based on this, the passing speed of the pole piece can be accelerated, and the drying effect can still be guaranteed, thereby improving the drying efficiency of the pole piece.
[0043] As an optional embodiment, the pole piece drying device further comprises a second heating roller 7, the second heating roller 7 is sleeved on the rotating shaft of the support frame, so that the second heating roller 7 can rotate around the rotating shaft. The second heating roller 7 is arranged outside the inlet 2. The second heating roller 7 can be made of stainless steel, and a cavity is arranged in the second heating roller 7, and a fourth heating member is embedded in the cavity. The fourth heating member can be an electric heating rod. After the fourth heating member is powered on, the fourth heating member generates heat to raise the temperature of the second heating roller 7.
[0044] For the pole piece that is not completely dried, after the pole piece is pulled out from the pole piece roll, the pole piece is first wound around the second heating roller 7, at which time the second surface of the pole piece is in contact with the outer wall of the second heating roller 7. Then the pole piece is wound around the first heating roller 6, at which time the first surface of the pole piece is in contact with the outer wall of the first heating roller 6. Then the pole piece is dried in the inside of the box 1 from the inlet 2 of the box 1. In this way, before the pole piece enters the inside of the box 1 for drying, the pole piece is wound around the second heating roller 7 and the first heating roller 6. The second heating roller 7 and the first heating roller 6 respectively heat the first surface and the second surface of the pole piece, achieving the effect of preheating. The first surface and the second surface of the pole piece are heated uniformly, and the pole piece is heated more uniformly as a whole.
[0045] Moreover, based on the arrangement of the first heating roller 6 and the second heating roller 7, the pole piece drying device can be suitable for single-sided pole pieces and double-sided pole pieces.
[0046] The first heating roller 6 is further provided with a first temperature detection module and a first control module. The first temperature detection module is used to detect the temperature of the first heating roller 6, and the first control module is in communication connection with the first temperature detection module and the third heating member respectively. When the temperature of the first heating roller 6 exceeds a preset value, the first control module controls the third heating member to stop heating, thereby realizing the monitoring and adjustment of the temperature of the first heating roller 6.
[0047] The second heating roller 7 is also provided with a second temperature detection module and a second control module, wherein the second temperature detection module is used to detect the temperature of the second heating roller 7, and the second control module is in communication connection with the second temperature detection module and the fourth heating piece respectively. When the temperature of the second heating roller 7 exceeds a preset value, the second control module controls the fourth heating piece to stop heating, so as to realize the monitoring and adjustment of the temperature of the second heating roller 7.
[0048] It should be noted that the preset temperature of the first heating roller 6 and the second heating roller 7 can be set according to the production standard requirements.
[0049] In a further embodiment, the first heating roller 6 is located on the right side below the second heating roller 7. In the horizontal direction, only a gap for the pole piece to pass through is left between the first heating roller 6 and the second heating roller 7. In this way, after the second surface of the pole piece passes around the top side of the second heating roller 7, it extends vertically downward to the first heating roller 6, and then the first surface of the pole piece passes around the bottom side of the first heating roller 6 and enters the inside of the box body 1 from the entrance 2 of the box body 1 for drying. The contact area between the pole piece and the first heating roller 6 and the second heating roller 7 is increased, and the preheating effect is improved.
[0050] In an optional embodiment, as shown in Figure 3 The first heating roller 6 and the second heating roller 7 are provided with a plurality of first heating rollers 6 and a plurality of second heating rollers 7 along the extension direction of the pole piece respectively. Moreover, the first heating roller 6 and the second heating roller 7 are arranged in intervals. The first heating roller 6 and the second heating roller 7 can be provided with three first heating rollers 6 and three second heating rollers 7 respectively. The three second heating rollers 7 are located on the upper side, and the three first heating rollers 6 are located on the lower side. In the horizontal direction, the first heating roller 6 and the second heating roller 7 are arranged in intervals.
[0051] In this way, after the pole piece is pulled out from the pole piece roll, the second surface of the pole piece extends downward to the first first heating roller 6 after passing around the top side of the first second heating roller 7, and then the first surface of the pole piece extends upward to the second second heating roller 7 after passing around the bottom side of the first first heating roller 6; the second surface of the pole piece extends downward to the second first heating roller 6 after passing around the top side of the second second heating roller 7, and then the first surface of the pole piece extends upward to the third second heating roller 7 after passing around the bottom side of the second first heating roller 6; the second surface of the pole piece extends downward to the third first heating roller 6 after passing around the top side of the third second heating roller 7, and then the first surface of the pole piece extends upward to the third first heating roller 6 after passing around the bottom side of the third first heating roller 6; and then the first surface of the pole piece enters the inside of the box body 1 from the entrance 2 of the box body 1 for drying. In this way, the pole piece is in an S-shaped track, which not only increases the preheating length of the pole piece to be dried, but also reduces the heat loss of the pole piece and improves the preheating efficiency.
[0052] In some embodiments, as shown in Figure 1As shown, the electrode drying apparatus further includes a first transition roller 8 and a second transition roller 9. The first transition roller 8 and the second transition roller 9 are respectively mounted on a rotating shaft on a support frame, allowing them to rotate. The first transition roller 8 is located on the side of the second heating roller 7 away from the inlet 2 and below the second heating roller 7. After the electrode is pulled out of the electrode roll, the first surface of the electrode passes over the first transition roller 8 and extends upward to the second heating roller 7, and then the second surface of the electrode passes over the second heating roller 7. The presence of the first transition roller 8 increases the coverage area of the second surface of the electrode on the second heating roller 7, that is, increases the heating area of the second surface of the electrode by the second heating roller 7.
[0053] The second transition roller 9 is disposed on the side of the first heating roller 6 near the inlet 2 and located above the first heating roller 6. The first surface of the electrode extends upward to the second transition roller 9 after passing over the first heating roller 6, and then the second surface of the electrode passes over the second transition roller 9 and enters the interior of the chamber 1 through the inlet 2 of the chamber 1 for drying. The presence of the second transition roller 9 increases the coverage area of the first surface of the electrode on the first heating roller 6, that is, increases the heating area of the first surface of the electrode by the first heating roller 6.
[0054] In some embodiments, such as Figure 1 As shown, the electrode drying device also includes an unwinding mechanism 11 and a rewinding mechanism 12. The electrode coating process includes continuous steps such as unwinding, splicing, pulling, tension control, automatic deviation correction, coating, drying, forming, and rewinding. The unwinding mechanism 11 and the rewinding mechanism 12 can be the unwinding machine and rewinding machine used in conventional electrode coating processes. An unwinding machine is a widely used piece of equipment in industrial production; its main function is to unwind rolled materials from a reel and smoothly transport them to the next production stage. A rewinding machine is a widely used piece of equipment in industrial production, mainly used for winding, collecting, sorting, and storing various materials.
[0055] The unwinding mechanism 11 is positioned outside the inlet 2, and the winding mechanism 12 is positioned outside the outlet 3. After the electrode roll to be dried is placed on the unwinding machine, the unwinding machine lays out the electrode roll, pulling the electrode out of the roll. After being pulled out, the electrode passes over the second heating roller 7 and the first heating roller 6, and then enters the drying chamber 1 through the inlet 2 for drying. The dried electrode exits through the outlet 3 of the drying chamber 1. After exiting, the electrode enters the winding machine, which winds it up to form an electrode roll.
[0056] In further embodiments, the pole piece drying device further comprises a third transition roller 10. The third transition roller 10 is sleeved on the rotating shaft of the support frame, so as to be able to rotate. The third transition roller 10 is arranged on the side of the winding mechanism 12 close to the outlet 3. After the dried pole piece passes out of the outlet 3 of the box 1, it first passes around the third transition roller 10 and then enters the winding mechanism 12. The third transition roller 10 supports the pole piece, avoiding damage caused by contact with the side of the outlet 3 of the box 1.
[0057] In some embodiments, as shown in FIG. 1, the pole piece drying device further comprises a first deviation rectifying mechanism 13 and a second deviation rectifying mechanism 14. Figure 1 The coating process of the pole piece includes continuous processes such as unwinding, splicing, pulling, tension control, automatic deviation rectification, coating, drying, forming, and winding. The first deviation rectifying mechanism 13 and the second deviation rectifying mechanism 14 can be deviation rectifying devices used in automatic deviation rectification in a conventional pole piece coating process. The deviation rectifying device is a device for rectifying the deviation of the movement track of the object to be rectified (such as a coiled material, a strip, etc.), which is widely used in various industrial productions.
[0058] The first deviation rectifying mechanism 13 is arranged between the unwinding mechanism 11 and the inlet 2 of the box 1. The pole piece extending from the unwinding mechanism 11 first passes through the first deviation rectifying mechanism 13, then passes around the second heating roller 7 and the first heating roller 6, and then enters the box 1 through the inlet 2 of the box 1 for drying. The first deviation rectifying mechanism 13 rectifies the pole piece during movement, preventing the pole piece from deviating from the correct path and affecting the subsequent drying effect.
[0059] The second deviation rectifying mechanism 14 is arranged between the winding mechanism 12 and the outlet 3 of the box 1. The pole piece passing out of the outlet 3 of the box 1 first passes through the second deviation rectifying mechanism 14 and then enters the winding mechanism 12. The second deviation rectifying mechanism 14 rectifies the pole piece before it enters the winding mechanism 12, preventing the pole piece from deviating from the correct path and affecting the subsequent effect of the winding mechanism 12 winding up the pole piece.
[0060] According to the embodiments of the present application, on the other hand, a pole piece production line is also provided, which comprises a drying device, which can be any of the pole piece drying devices described above. When the loss on drying rate of the pole piece does not meet the standard, the pole piece can be put into the pole piece drying device for further drying. The technical effect of the pole piece production line is consistent with the beneficial effects brought by the pole piece drying device.
[0061] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.
Claims
1. An electrode drying apparatus, characterized in that, The polar plate drying device comprises: a box (1) and first and second heating elements (4, 5) arranged in the box (1), the first and second heating elements (4, 5) forming a channel for a polar plate to pass through, and the box (1) being provided with an inlet (2) and an outlet (3) for the polar plate to enter and exit, respectively; the polar plate drying device further comprises first and second heating rollers (6, 7), the first heating roller (6) being arranged outside the inlet (2), the first heating roller (6) being provided with a third heating element, and the first heating roller (6) being adapted for the first surface of the polar plate to pass through, and the second heating roller (7) being arranged on the side of the first heating roller (6) away from the inlet (2), the second heating roller (7) being provided with a fourth heating element, and the second heating roller (7) being adapted for the second surface of the polar plate to pass through.
2. The pole piece drying apparatus according to claim 1, characterized by The first and second heating elements (4, 5) are infrared lamps.
3. The pole piece drying apparatus of claim 1, wherein The first and second heating rollers (6, 7) are arranged in multiple and are spaced apart along the extension direction of the polar plate.
4. The pole piece drying apparatus of claim 1, wherein The polar plate drying device further comprises: a first transition roller (8) arranged on the side of the second heating roller (7) away from the inlet (2), the first transition roller (8) being adapted for the first surface of the polar plate to pass through; a second transition roller (9) arranged on the side of the first transition roller (8) close to the inlet (2), the second transition roller (9) being adapted for the second surface of the polar plate to pass through.
5. The pole piece drying apparatus of claim 1, wherein The polar plate drying device further comprises: an unwinding mechanism (11) arranged outside the inlet (2), the unwinding mechanism (11) being adapted for laying the polar plate; a winding mechanism (12) arranged outside the outlet (3), the winding mechanism (12) being adapted for winding the polar plate.
6. The pole piece drying apparatus of claim 5, wherein The polar plate drying device further comprises: a third transition roller (10) arranged on the side of the winding mechanism (12) close to the outlet (3), the third transition roller (10) being adapted for the polar plate to pass through and be connected to the winding mechanism (12).
7. The pole piece drying apparatus of claim 5, wherein The polar plate drying device further comprises: a first deviation rectifying mechanism (13) arranged between the unwinding mechanism (11) and the inlet (2), the first deviation rectifying mechanism (13) being adapted for the polar plate to pass through and rectify the deviation of the polar plate; a second deviation rectifying mechanism (14) arranged between the winding mechanism (12) and the outlet (3), the second deviation rectifying mechanism (14) being adapted for the polar plate to pass through and rectify the deviation of the polar plate.
8. An electrode tab production line characterized by, The polar plate drying device comprises: a drying device adapted for drying a polar plate, the drying device being the polar plate drying device according to any one of claims 1-7.