Device for preventing single-sided pole piece from curling, lamination assembly and battery production line
By balancing stress differences through the spraying and drying mechanisms in the single-sided electrode rolling device, and improving cutting accuracy through the clamping mechanism, the problem of single-sided electrode warping is solved, thereby improving the flatness of the electrode and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-03-24
AI Technical Summary
Single-sided electrodes are prone to warping during rolling, which affects die-cutting and stacking processes, resulting in low production efficiency.
A device for preventing single-sided electrode curling is provided, including unwinding, spraying, drying and cutting mechanisms. By spraying liquid onto the foil side of the single-sided electrode strip and drying it, the stress difference between the coated surface and the foil side is balanced. Combined with a clamping mechanism, the cutting accuracy and flatness are improved.
This effectively avoids warping of single-sided electrodes, improves the flatness and quality of single-sided electrodes, and increases production efficiency and yield.
Smart Images
Figure CN224036388U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of battery production, and specifically provides a single-face pole piece curling prevention device, a lamination assembly and a battery production line. BACKGROUND
[0002] The mainstream type of battery includes a winding battery and a lamination battery, both of which are widely used in many fields such as electronic devices and automobiles due to the characteristics of high energy density and long service life. Compared with the winding battery, the current density distribution of the lamination battery is more uniform, and the cycle and rate performance is superior, so it is more popular in the market.
[0003] Figure 1 is a structural diagram of a battery cell in the prior art. As shown in Figure 1 , the battery cell of the lamination battery in the prior art is usually composed of positive and negative pole pieces stacked alternately, with a separator 93 in between. In order to save electrode paste and reduce the thickness of the battery cell, the pole pieces at the uppermost and lowermost layers of the battery cell are usually designed as single-face pole pieces 91, and the pole pieces in the middle are designed as double-face pole pieces 92. The so-called single-face pole piece refers to a unique structure in which the current collector is coated with electrode paste on one side to form a coated surface and a light foil surface, and the double-face pole piece refers to a structure in which the current collector is coated with electrode paste on both sides.
[0004] In the prior art, when the single-face pole piece is rolled, the stresses generated on the coated surface and the light foil surface of the single-face pole piece are different, which easily causes the single-face pole piece to warp. This is not conducive to the processes of die cutting, punching and lamination, and greatly reduces the production efficiency.
[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. INVENTION CONTENTS
[0006] The utility model aims at solving the above technical problems, i.e. solving the problem of easy warping of single-face pole pieces. To this end, the utility model provides a single-face pole piece curling prevention device, which comprises, in sequence along the conveying path of a single-face pole piece tape, an unwinding mechanism, a spraying mechanism, a drying mechanism and a first cutting mechanism:
[0007] The unwinding mechanism is configured to output the single-face pole piece tape, one side of which is a coated surface and the other side is a light foil surface;
[0008] The spraying mechanism is configured to spray liquid onto the light foil surface;
[0009] The drying mechanism is configured to dry the single-face pole piece tape sprayed with liquid;
[0010] The first cutting mechanism is configured to cut the dried single-face pole piece tape to obtain single-face pole pieces.
[0011] In the preferred technical scheme of the single-sided pole piece curling prevention device, the unwinding mechanism outputs the single-sided pole piece tape with the light foil facing downward and the coating facing upward.
[0012] In the preferred technical scheme of the single-sided pole piece curling prevention device, the single-sided pole piece curling prevention device further comprises:
[0013] A liquid collecting groove is arranged below the single-sided pole piece tape conveying path and between the unwinding mechanism and the drying mechanism, and is used to collect liquid droplets dripping from the light foil.
[0014] In the preferred technical scheme of the single-sided pole piece curling prevention device, the single-sided pole piece curling prevention device further comprises a clamping mechanism, which is arranged on the discharge side of the first cutting mechanism and is configured to reciprocate along the conveying path of the single-sided pole piece tape between a first position and a second position, so that the clamping mechanism can clamp the uncut single-sided pole piece tape when in the first position and move to the second position, and the clamping mechanism can release after the first cutting mechanism cuts the single-sided pole piece tape and move to the first position when in the second position.
[0015] The first cutting mechanism is configured to cut the single-sided pole piece tape and obtain a single-sided pole piece during the movement of the clamping mechanism from the first position to the second position.
[0016] In the preferred technical scheme of the single-sided pole piece curling prevention device, the clamping mechanism comprises a first clamping plate and a second clamping plate, which are respectively arranged on both sides of the single-sided pole piece tape along its conveying path and can be relatively close or far apart to clamp or release the single-sided pole piece tape.
[0017] In the preferred technical scheme of the single-sided pole piece curling prevention device, the drying mechanism is provided with a drying channel through which the single-sided pole piece tape passes.
[0018] In the preferred technical scheme of the single-sided pole piece curling prevention device, the single-sided pole piece curling prevention device further comprises:
[0019] A second cutting mechanism is arranged between the unwinding mechanism and the spraying mechanism, and is used to cut the single-sided pole piece tape to form a pole ear.
[0020] In the preferred technical scheme of the single-sided pole piece curling prevention device, the first cutting mechanism is a laser cutting mechanism or a punching mechanism; and / or the second cutting mechanism is a laser cutting mechanism or a punching mechanism.
[0021] The application further provides a lamination assembly comprising the single-sided pole piece curling prevention device according to any of the preferred technical solutions.
[0022] The application further provides a battery production line comprising the single-sided pole piece curling prevention device according to any of the preferred technical solutions or the lamination assembly according to the preferred technical solution.
[0023] As can be understood by those skilled in the art, the single-sided pole piece curling prevention device of the application comprises a unwinding mechanism, a spraying mechanism, a drying mechanism and a first cutting mechanism arranged in sequence along the conveying path of the single-sided pole piece material belt, spraying liquid to the light foil surface of the single-sided pole piece material belt and then drying to remove the liquid on the light foil surface, which helps to balance the stress difference between the coated surface and the light foil surface of the single-sided pole piece material belt, avoids the problem that the pole piece is prone to curling due to the stress difference between the coated surface and the light foil surface, and thus improves the flatness and overall quality of the single-sided pole piece.
[0024] Further, by winding the single-sided pole piece material belt on the unwinding mechanism with the coated surface inward and the light foil surface outward, the problem of pole piece curling can be reduced to a certain extent.
[0025] Further, by arranging a liquid collecting groove below the conveying path of the single-sided pole piece material belt, water droplets dripping from the light foil surface can be collected, thereby keeping the working area clean.
[0026] Further, by arranging a clamping mechanism on the discharge side of the first cutting mechanism, not only the cutting precision and consistency can be improved, but also the flatness of the single-sided pole piece can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0027] The preferred embodiments of the application will be described below with reference to the accompanying drawings, in which:
[0028] Figure 1 is a structural diagram of an existing battery cell structure;
[0029] Figure 2 is a structural diagram of the single-sided pole piece curling prevention device of the application;
[0030] Figure 3 is a plan view of the single-sided pole piece curling prevention device of the application;
[0031] Figure 4 is a schematic view of the unwinding mechanism releasing the single-sided pole piece material belt.
[0032] REFERENCE SIGNS:
[0033] 1, pay-off mechanism; 2, injection mechanism; 3, drying mechanism; 31, drying channel; 4, punching mechanism; 5, liquid collecting tank; 6, laser cutting mechanism; 7, clamping mechanism; 71, first clamping plate; 72, second clamping plate; 8, single-sided pole piece tape; 81, pole lug; 82, coated surface; 83, light foil surface; 84, current collector; 91, single-sided pole piece; 92, double-sided pole piece; 93, film. DETAILED DESCRIPTION
[0034] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.
[0035] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0036] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0037] Combination Figures 2-4 The anti-single-sided pole piece curling device of the present application is introduced.
[0038] In order to solve the problem that the single-sided pole piece is easy to curl, the utility model provides an anti-single-sided pole piece curling device, which comprises a pay-off mechanism 1, an injection mechanism 2, a drying mechanism 3 and a first cutting mechanism which are arranged in sequence along the conveying path of the single-sided pole piece tape 8. The pay-off mechanism 1 is configured to be able to output the single-sided pole piece tape 8, one side of the single-sided pole piece tape 8 is a coated surface 82, and the other side is a light foil surface 83. The injection mechanism 2 is configured to be able to inject liquid onto the light foil surface 83. The drying mechanism 3 is configured to be able to dry the single-sided pole piece tape 8 injected with liquid. The first cutting mechanism is configured to be able to cut the single-sided pole piece tape 8 after drying to obtain a single-sided pole piece 91.
[0039] The present application helps to balance the stress difference between the coating surface 82 and the light foil surface 83 of the single-sided pole piece material belt 8 by spraying liquid on the light foil surface 83 of the single-sided pole piece material belt 8 and then drying to remove the liquid on the light foil surface 83, avoiding the problem of easy warping of the pole piece caused by the stress difference between the coating surface 82 and the light foil surface 83, so as to improve the flatness and overall quality of the single-sided pole piece 91.
[0040] The conveying path of the single-sided pole piece material belt 8 is as shown in the arrow direction. Figures 3-4 The arrow direction is shown.
[0041] The following will be described with reference to Figures 2-4 , a preferred embodiment of the single-sided pole piece anti-warping device of the present application. It should be understood by those skilled in the art that the following embodiment is only used to illustrate the principle of the present application and is not intended to limit the protection scope of the present application. Under the premise of meeting the single-sided pole piece anti-warping device at least including the unwinding mechanism 1, the spraying mechanism 2, the drying mechanism 3 and the first cutting mechanism, those skilled in the art can adjust the following setting mode so that the present application can be applied to more specific application scenarios.
[0042] Referring to Figures 2-4 , the single-sided pole piece anti-warping device includes the unwinding mechanism 1, the spraying mechanism 2, the drying mechanism 3, the first cutting mechanism, the second cutting mechanism, the clamping mechanism 7 and the liquid collecting tank 5. The unwinding mechanism 1 has the single-sided pole piece material belt 8 wound thereon, which includes the current collector 84 and the electrode slurry coating layer arranged on one side of the current collector 84, so that one side of the single-sided pole piece material belt 8 is the coating surface 82 and the other side is the light foil surface 83. The unwinding mechanism 1 can unwind the single-sided pole piece material belt 8 wound thereon by rotating and output the single-sided pole piece material belt 8 with the coating surface 82 facing upwards and the light foil surface 83 facing downwards. During the output of the single-sided pole piece material belt 8, the single-sided pole piece material belt 8 passes through the second cutting mechanism, the spraying mechanism 2, the drying mechanism 3, the first cutting mechanism and the clamping mechanism 7 in sequence, thereby obtaining the single-sided pole piece 91.
[0043] It should be noted that the single-sided pole piece material belt 8 wound on the unwinding mechanism 1 in the present application can be a single-sided negative pole piece material belt or a single-sided positive pole piece material belt. The single-sided pole piece material belt 8 is described as a single-sided negative pole piece material belt. In the production of the single-sided negative pole piece material belt, negative electrode slurry is sprayed to one side of the current collector 84 through the spraying assembly, and the sprayed current collector 84 is sequentially dried and rolled through the drying assembly and the rolling assembly to obtain the single-sided pole piece material belt 8, and finally the obtained single-sided pole piece material belt 8 is wound on the unwinding mechanism 1.
[0044] Of course, the output mode of the single-sided pole piece material belt 8 is not fixed in the present application, and those skilled in the art can adjust it according to the needs. For example, the single-sided pole piece material belt 8 can also be output with the coated surface 82 facing down and the light foil surface 83 facing up. In addition, the present application does not limit the specific type of current collector 84, as long as it can conduct current and support the electrode paste. For example, the current collector 84 can be an aluminum foil or a copper foil.
[0045] Next, referring to Figure 4 , the single-sided pole piece material belt 8 is wound on the unwinding mechanism 1 with the coated surface 82 facing inwards and the light foil surface 83 facing outwards. By using the above winding method, the problem of the coated surface 82 of the single-sided pole piece material belt 8 warping towards the light foil surface 83 can be alleviated, further improving the flatness of the single-sided pole piece 91.
[0046] It should be noted that the single-sided pole piece material belt 8 can also be wound on the unwinding mechanism 1 with the coated surface 82 facing outwards and the light foil surface 83 facing inwards. However, compared to the winding method with the coated surface 82 facing inwards and the light foil surface 83 facing outwards, this winding method cannot improve the flatness of the single-sided pole piece 91.
[0047] Next, referring to Figures 2-3 , the second cutting mechanism is a laser cutting mechanism 6. When the single-sided pole piece material belt 8 passes through the laser cutting mechanism 6, the laser cutting mechanism 6 can cut the edges of the single-sided pole piece material belt 8 and form the pole lug 81 on the material belt. By using the laser cutting mechanism 6 for cutting, the flatness of the cutting edge can be ensured, thereby improving the quality of the single-sided pole piece 91.
[0048] Of course, the specific type of the second cutting mechanism is not fixed in the present application, and those skilled in the art can adjust it according to the needs. For example, the first cutting mechanism can also be a punching mechanism 4. It should be noted that the laser cutting mechanism 6 and the punching mechanism 4 are both common devices in the prior art, and therefore will not be described here.
[0049] Next, referring to Figures 2-3 , the spraying mechanism 2 is arranged below the light foil surface 83. When the single-sided pole piece material belt 8 passes through the spraying mechanism 2, the spraying mechanism 2 can spray liquid onto the light foil surface 83. By using the above spraying method, the liquid can be prevented from being sprayed onto the coated surface 82, thereby affecting the flatness of the single-sided pole piece 91. In addition, below the light foil surface 83, i.e. below the conveying path of the single-sided pole piece material belt 8, a liquid collecting tank 5 is also arranged. The liquid collecting tank 5 is located between the second cutting mechanism and the drying mechanism 3, and the spraying mechanism 2 is installed in the liquid collecting tank 5. By using the above arrangement, the liquid droplets dripping on the light foil surface 83 can be collected, thereby keeping the working area clean.
[0050] It should be noted that the present application does not limit the way in which the spraying mechanism 2 is installed on the collecting groove 5, as long as the spraying mechanism 2 can spray liquid to the light foil surface 83, and the collecting groove 5 can collect the liquid droplets falling on the light foil surface 83. For example, the spraying mechanism 2 can be installed in the collecting groove 5 through a support. In addition, the collecting groove 5 can not only be used to collect the falling liquid droplets, but also as a liquid storage tank. That is, the spraying mechanism 2 is used to collect the liquid droplets falling from the light foil surface 83 on one hand, and on the other hand, it provides a liquid source for the spraying mechanism 2, so that the liquid can be recycled and waste is reduced. In addition, the spraying mechanism 2 is a common spraying mechanism 2 in the prior art, which will not be described here.
[0051] Next, referring to Figures 2-3 The drying mechanism 3 is provided with a drying channel 31 through which the single-sided pole piece material belt 8 passes, so that the single-sided pole piece material belt 8 with liquid droplets can dry the light foil surface 83 when passing through the drying channel 31. By making the single-sided pole piece material belt 8 pass through the spraying mechanism 2 and the drying mechanism 3 in turn, it helps to balance the stress difference between the coating surface 82 of the single-sided pole piece material belt 8 and the light foil surface 83, and avoids the problem that the pole piece is prone to warping due to the stress difference between the coating surface 82 and the light foil surface 83, thereby improving the flatness and overall quality of the single-sided pole piece 91.
[0052] It should be noted that heating elements can be provided at the top and bottom of the drying channel 31 to dry the single-sided pole piece material belt 8. The heating temperature of the heating elements is in the range of 95-100°C, and the single-sided pole piece 91 passes through the drying channel 31 for 30-60s. By using the above heating temperature and heating time to dry the single-sided pole piece material belt 8, the flatness of the single-sided pole piece 91 can be ensured. The present application does not limit the type of heating temperature of the heating element, as long as it can dry the single-sided pole piece material belt 8. For example, the heating element can be a heating wire.
[0053] Next, referring to Figures 2-3 The first cutting mechanism is a punching mechanism 4, which can cut the single-sided pole piece material belt 8 to obtain the single-sided pole piece 91, which then enters the next step of the lamination process. By using the punching mechanism 4 to cut the single-sided pole piece material belt 8, it can reduce product defects caused by poor cutting and improve the yield of the single-sided pole piece 91.
[0054] Of course, the specific type of the first cutting mechanism is not fixed, and those skilled in the art can adjust it as needed. For example, the first cutting mechanism can also be a punching mechanism 4.
[0055] Next, referring to Figures 2-3The first cutting mechanism is provided with a clamping mechanism 7 on the discharge side. The clamping mechanism 7 comprises a first clamping plate 71, a second clamping plate 72, a first driving mechanism (not shown in the figure) and a second driving mechanism (not shown in the figure). The first clamping plate 71 and the second clamping plate 72 are respectively located on both sides of the single-pole tab material belt 8 along its conveying path, and the first clamping plate 71 is connected with the first driving mechanism and the second clamping plate 72 is connected with the second driving mechanism, so that the first clamping plate 71 can be driven by the first driving mechanism and the second clamping plate 72 can be driven by the second driving mechanism to relatively approach or move away from each other, so that the first clamping plate 71 and the second clamping plate 72 can clamp or release the single-pole tab material belt 8 when they relatively approach or move away from each other, so that the first clamping plate 71 and the second clamping plate 72 can clamp the single-pole tab material belt 8 during the clamping process, and the punching mechanism 4 can cut the single-pole tab material belt 8, thereby improving the quality of the single-pole tab 91. In addition, the first clamping plate 71 and the second clamping plate 72 can also drive the single-pole tab material belt 8 to reciprocate along the conveying path of the single-pole tab material belt 8 between the first position and the second position under the driving of the driving mechanism. The first position is close to the discharge side of the first cutting mechanism relative to the second position. When the clamping mechanism is in the first position, the first clamping plate 71 and the second clamping plate 72 relatively approach and clamp the single-pole tab material belt located on the discharge side of the punching mechanism 4, and drive the clamped single-pole tab material belt 8 to move to the second position. During the movement to the second position, the punching mechanism 4 cuts the single-pole tab material belt 8 along the side of the clamping plate close to the punching mechanism 4, ensuring that the cut single-pole tab 91 can be completely clamped and fixed by the first clamping plate 71 and the second clamping plate 72, thereby improving the flatness of the single-pole tab 91. When the tab mechanism is in the second position, the first clamping plate 71 and the second clamping plate 72 relatively move away, thereby releasing the single-pole tab 91, and moving to the first position, and so on, until the cutting work of all single-pole tab material belts 8 is completed.
[0056] In order to ensure the cutting quality of the single-pole tab 91, the punching mechanism 4 can be connected with the first clamping plate 71 through a connecting piece, or installed on a third driving mechanism, to ensure that the punching mechanism 4 and the clamping plate move at the same frequency and speed during reciprocation between the first position and the second position, which is beneficial to the cutting of the punching mechanism 4 along the side of the clamping plate close to the punching mechanism 4 to the single-pole tab material belt 8, and ensures the quality of the single-pole tab 91.
[0057] It should be noted that the first driving mechanism and the second driving mechanism are not limited in the present application, as long as they can drive the two clamping plates to move closer to or away from each other, and reciprocate between the first position and the second position. For example, the first driving mechanism and the second driving mechanism can both be mechanical hands. In addition, in order to enable the single-sided pole piece tape 8 to still move along the above-mentioned predetermined conveying path after being cut by the first cutting mechanism, two transmission rollers can be arranged opposite to each other on the feeding side of the first cutting mechanism, and the single-sided pole piece tape 8 is clamped between the two transmission rollers, and the single-sided pole piece tape 8 is driven to travel along the predetermined conveying path by the transmission rollers. The two transmission rollers can serve as the driving force for driving the unwinding mechanism 1 to unwind. Specifically, when the transmission rollers drive the single-sided pole piece tape 8 to move along the conveying path, the unwinding mechanism 1 will rotate correspondingly due to the pulling of the single-sided pole piece tape 8, thereby unwinding the single-sided pole piece tape 8 wound thereon. Among them, the two transmission rollers can be simultaneously configured with a driving motor, and the transmission rollers are driven to rotate by the driving motor, thereby driving the unwinding mechanism 1 to unwind while driving the single-sided pole piece tape 8 to move. Alternatively, a separate driving mechanism can also be used to drive the unwinding mechanism 1 to rotate to realize the unwinding work of the single-sided pole piece tape 8.
[0058] In combination Figures 2-4 The working process of the single-sided pole piece curling prevention device of the present application will be described as follows:
[0059] After the production of the single-sided pole piece material belt 8 is completed by spraying, drying and rolling, the single-sided pole piece material belt 8 is wound on the unwinding mechanism 1. The free end of the single-sided pole piece material belt 8 wound on the unwinding mechanism 1 passes through the spraying mechanism 2 and the drying mechanism 3 in sequence and is clamped between two transmission rollers. The transmission roller group is located on the feeding side of the punching mechanism 4 and can drive the unwinding mechanism 1 to perform unwinding operation when working, so as to ensure the continuous and stable transmission of the single-sided pole piece material belt 8. When the single-sided pole piece material belt 8 passes through the spraying mechanism 2 under the action of the transmission roller, the spraying mechanism 2 sprays water mist to the light foil area of the single-sided pole piece material belt 8 formed by the pole lug 81, and the single-sided pole piece material belt 8 with water mist enters the drying channel 31 of the drying mechanism 3, and the drying mechanism 3 performs drying operation on the single-sided pole piece material belt 8. Then, the dried single-sided pole piece material belt 8 passes through the transmission roller to the discharge side of the punching mechanism 4. When the single-sided pole piece material belt 8 on the discharge side reaches the predetermined length along the length of the conveying path, the first clamping plate 71 and the second clamping plate 72 in the clamping mechanism 7 approach each other, clamp and fix the single-sided pole piece material belt 8 on the discharge side of the punching mechanism 4, and move from the first position to the second position. The punching mechanism 4 cuts the single-sided pole piece material belt 8 along the side close to the punching mechanism 4 during the movement of the clamping mechanism 7, so as to obtain the single-sided pole piece 91. When the clamping mechanism 7 reaches the second position, the first clamping plate 71 and the second clamping plate 72 move away from each other to release the single-sided pole piece 91 and then move to the first position. Then, the single-sided pole piece material belt 8 on the discharge side of the punching mechanism 4 is clamped and fixed. The single-sided pole piece 91 released by the clamping mechanism 7 enters the subsequent lamination process.
[0060] The single-sided pole piece 91 obtained by adopting the above scheme can improve the flatness and quality of the single-sided pole piece 91 by using the single-sided pole piece curling prevention device.
[0061] In addition, the application also provides a lamination assembly, which comprises the single-sided pole piece curling prevention device of any of the above embodiments.
[0062] The lamination assembly refers to a complete system for stacking positive and negative pole pieces and separators to form a battery cell. It not only covers the die-cutting equipment equipped with the above-mentioned single-sided pole piece curling prevention device, but also includes conveying devices, mechanical hands, lamination tables, separator unwinding devices, etc. The die-cutting equipment is responsible for cutting the coated positive and negative pole pieces into the required size, the conveying device transfers the pole pieces from the die-cutting equipment to the feeding position of the mechanical hand, the mechanical hand transfers the pole pieces to the lamination table by grabbing the pole pieces, and the lamination table stacks the positive and negative pole pieces and the separator in sequence. The separator unwinding device supplies the separator material to ensure the smooth progress of the lamination process.
[0063] In addition, the application also provides a battery production line, which comprises the single-sided pole piece curling prevention device of any of the above embodiments or the lamination assembly.
[0064] The battery production line has all the technical effects of the aforementioned lamination assembly, and will not be described here again.
[0065] Those skilled in the art will appreciate that a combination of features of different embodiments implies within the scope of the application and forms different embodiments, although some embodiments described herein include certain features rather than others included in other embodiments. For example, in the claims of the application, any of the claimed embodiments can be used in any combination.
[0066] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.
Claims
1. A device for preventing single-sided electrode curling, characterized in that, It includes an unwinding mechanism, a spraying mechanism, a drying mechanism, and a first cutting mechanism arranged sequentially along the conveying path of the single-sided electrode strip; The unwinding mechanism is configured to output the single-sided electrode strip, one side of which is a coated surface and the other side is a foil surface; The spraying mechanism is configured to spray liquid onto the foil surface; The drying mechanism is configured to dry the single-sided electrode strip sprayed with liquid; The first cutting mechanism is configured to cut the dried single-sided electrode strip to obtain a single-sided electrode.
2. The anti-single-sided electrode curling device according to claim 1, characterized in that, The unwinding mechanism outputs the single-sided electrode strip with the foil side facing down and the coating side facing up.
3. The anti-single-sided electrode curling device according to claim 2, characterized in that, The device for preventing single-sided electrode curling also includes: A liquid collection tank, located below the conveying path of the single-sided electrode strip and between the unwinding mechanism and the drying mechanism, is used to collect droplets falling from the foil surface.
4. The anti-single-sided electrode curling device according to claim 1, characterized in that, The anti-single-sided electrode curling device further includes a clamping mechanism located on the discharge side of the first cutting mechanism. The clamping mechanism is configured to reciprocate between a first position and a second position along the conveying path of the single-sided electrode strip, so that when the clamping mechanism is in the first position, it can clamp the uncut single-sided electrode strip and move it to the second position, and when the clamping mechanism is in the second position, it can release the single-sided electrode strip after it has been cut by the first cutting mechanism and move it to the first position. as well as The first cutting mechanism is configured to cut the single-sided electrode strip and obtain a single-sided electrode as the clamping mechanism moves from the first position to the second position.
5. The anti-single-sided electrode curling device according to claim 4, characterized in that, The clamping mechanism includes a first clamping plate and a second clamping plate, which are located on both sides of the single-sided electrode strip along its conveying path and can be relatively close to or far away from each other to clamp or release the single-sided electrode strip.
6. The anti-single-sided electrode curling device according to claim 1, characterized in that, The drying mechanism is provided with a drying channel through which the single-sided electrode strip passes.
7. The anti-single-sided electrode curling device according to claim 1, characterized in that, The device for preventing single-sided electrode curling also includes: The second cutting mechanism, located between the unwinding mechanism and the spraying mechanism, is used to cut the single-sided electrode strip to form electrode tabs.
8. The anti-single-sided electrode curling device according to claim 7, characterized in that, The first cutting mechanism is a laser cutting mechanism or a punching mechanism; and / or, the second cutting mechanism is a laser cutting mechanism or a punching mechanism.
9. A laminated assembly, characterized in that, The stacked assembly includes the anti-single-sided electrode curling device as described in any one of claims 1-8.
10. A battery production line, characterized in that, The battery production line includes the anti-single-sided electrode curling device according to any one of claims 1-8, or the stacked assembly according to claim 9.