Apparatus and methods for improving wrinkle deformation and premature peeling of transfer composite electrodes

Abstract

This invention belongs to the field of power battery technology, specifically relating to an apparatus and method for improving the wrinkling and premature peeling of transfer-printed composite electrode sheets. It is used to process composite electrode sheets conveyed from a pressing roller to a peeling roller during the transfer process, including: an upstream clamping group and a downstream clamping group sequentially arranged between the pressing roller and the peeling roller along the conveying direction of the composite electrode sheet; each of the upstream and downstream clamping groups includes an active roller and a clamping roller arranged opposite to each other, with the composite electrode sheet passing between the active roller and the clamping roller; the upstream clamping group is configured to use a speed control mode; the downstream clamping group is configured to use a torque control mode to apply a constant resistance to the composite electrode sheet. This invention effectively isolates tension disturbances from the downstream winding system, avoiding problems such as base film warping, wrinkling, and premature peeling caused by inconsistent winding tension of the upper and lower electrolyte base films.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery technology, specifically relating to an apparatus and method for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets. Background Technology

[0002] With the rapid development of energy storage technology and the power battery industry, the shortcomings of traditional liquid lithium-ion batteries in terms of energy density and safety performance are becoming increasingly prominent. All-solid-state batteries, which replace traditional liquid electrolytes with solid electrolytes, have shown significant advantages in energy density, thermal stability, mechanical strength, and cycle life, and have become a hot topic in the research and industrial application of energy storage and power batteries.

[0003] In the fabrication process of all-solid-state batteries, the reliable bonding of solid electrolytes and battery electrodes is a core process that determines the cell interface performance and finished product quality. Currently, the rolling transfer method is the mainstream process in the industry for achieving the composite assembly of solid electrolytes and electrodes. The basic process is as follows: using the mechanical pressing action of rollers, the upper and lower layers of solid electrolytes are tightly bonded to the middle layer of electrode, forming a "sandwich" layered composite electrode structure; then, the electrolyte base film after transfer is peeled off from the electrode surface by a peeling roller, and the peeled base films are wound up separately. In this process, the belt tension of the electrolyte base film directly determines the stress state of the substrate during peeling and winding, and is a key process parameter affecting the transfer quality.

[0004] In actual production, after the upper and lower electrolyte base films are peeled off, they enter independent winding processes. Due to factors such as mechanical differences in the winding mechanism, roll diameter variations, and the accuracy of the tension control system, it is often difficult to maintain a completely consistent winding tension between the upper and lower base films. This tension difference is transmitted along the base film to the composite electrode area before peeling, negatively impacting the transfer effect and interface bonding quality. When the winding tension of the upper and lower electrolyte base films is inconsistent, the composite electrode is prone to the following problems during the conveyor belt process before peeling: First, the electrolyte base film warps and wrinkles, preventing effective transfer at the wrinkled areas and resulting in incomplete transfer of the electrolyte material area to the electrode surface; Second, due to the limited peeling force between the solid electrolyte and the base film, the electrolyte layer may be prematurely peeled off before reaching the peeling roller under the influence of tension differences, resulting in excessive base film residue on the electrode surface. These problems not only generate a large number of defective products and waste raw materials but also severely restrict the production yield of the all-solid-state battery rolling transfer process.

[0005] To address the aforementioned issues, several technical solutions have been explored. For example, patent CN121688137A proposes a peeling mechanism and method for composite electrode sheets and electrolyte carrier base films. This solution sets up a clamping roller unit between the peeling roller and the electrolyte carrier base film winding shaft to isolate the transmission of winding tension to the peeling unit. However, this solution only blocks the influence of winding tension on the peeling roller. The composite electrode sheet running section between the pressing roller and the peeling roller is still affected by the inconsistent tension of the upper and lower base films. Furthermore, when only one set of clamping rollers is used for tension isolation, it is difficult for this set of clamping rollers to effectively absorb and buffer any speed or tension fluctuations, and the problems of base film wrinkling or premature electrolyte peeling still exist. Patent CN121331748A proposes a solid-state battery electrode transfer method, which achieves the transfer of electrolyte to the electrode sheet through steps such as cutting, peeling adsorption, rotation, and pressing. However, this method mainly involves the redesign of the transfer process and does not address the control of the base film running tension before peeling. In addition, some solutions propose to adapt different winding directions and angles to different base film materials to improve the transfer effect. However, such methods are limited by the type of base film material, have a narrow process window, and the residual base film after peeling has not been systematically evaluated. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus and method for improving the wrinkling deformation and premature peeling of transfer composite electrodes, which can effectively solve the problems of wrinkling deformation of composite electrodes and premature peeling of electrolytes before peeling caused by the difference in winding tension between the upper and lower base films.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an apparatus for improving the wrinkling and premature peeling of transfer composite electrode sheets, used to process composite electrode sheets conveyed from a pressing roller to a peeling roller during the transfer process, comprising: Along the belt-carrying direction of the composite electrode sheet, an upstream clamping group and a downstream clamping group are sequentially arranged between the rolling roller and the stripping roller; The upstream clamping group and the downstream clamping group each include a drive roller and a clamping roller arranged opposite to each other, and the composite electrode sheet passes between the drive roller and the clamping roller; The upstream clamping assembly is configured to use a speed control mode to transport the composite electrode sheet at a preset constant linear speed. The downstream clamping assembly is configured to employ a torque control mode to apply a constant resistance to the composite electrode to establish and maintain a constant tension between the upstream clamping assembly and the downstream clamping assembly.

[0008] Preferably, the linear velocity of the driving roller of the upstream clamping assembly... Determined by the following formula: , Among them, V line α represents the normal travel speed of the electrode, α is the lead rate, and 0 < α ≤ 0.05.

[0009] Preferably, the output torque of the drive roller of the downstream clamping assembly Determined by the following formula: , Among them, F set The target tension value is given by D, where D is the diameter of the drive roller of the downstream clamping assembly.

[0010] Preferably, the distance between the upstream clamping group and the downstream clamping group is 0.8m to 1.2m.

[0011] Preferably, the distance between the downstream clamping assembly and the stripping roller is 0.1m to 0.3m.

[0012] Preferably, the distance between the upstream clamping assembly and the rolling roller is 0.4m to 0.5m.

[0013] Preferably, the drive roller is made of alloy steel with a hard chrome plated surface, and the clamping roller is a rubber roller.

[0014] This invention also discloses a method for improving the wrinkling deformation and premature peeling of transfer composite electrodes, comprising the following steps: S1: The composite electrode sheet formed after rolling is passed through the upstream clamping group and the downstream clamping group arranged along the conveyor belt direction in sequence. The composite electrode sheet is a sandwich layered structure composed of an upper electrolyte base film, an intermediate electrode sheet and a lower electrolyte base film. S2: Activate the upstream clamping assembly and adopt the speed control mode to transport the composite electrode sheet at a preset constant linear speed; S3: Activate the downstream clamping group and adopt torque control mode to apply constant resistance to the composite electrode, thereby establishing constant tension between the upstream clamping group and the downstream clamping group; S4: The composite electrode sheet after passing through the downstream clamping group is conveyed to the stripping roller for stripping the electrolyte base film.

[0015] Preferably, in step S2, the linear velocity of the driving roller of the upstream clamping assembly... Determined by the following formula:

[0016] Among them, V line The normal travel speed of the electrode is α, and the lead rate is 0 < α ≤ 0.05; In step S3, the output torque M of the driving roller of the downstream clamping assembly set Determined by the following formula: , Among them, F set The target tension value is given by D, where D is the diameter of the drive roller of the downstream clamping assembly.

[0017] Preferably, in step S1, the conveying speed of the composite electrode is 2 m / min to 6 m / min.

[0018] The beneficial effects of this invention are as follows: By sequentially setting an upstream clamping group using speed control mode and a downstream clamping group using torque control mode between the pressing roller and the peeling roller along the direction of the composite electrode, the upstream clamping group establishes a precise speed reference, while the downstream clamping group provides constant resistance and absorbs upstream speed fluctuations. This forms a tension isolation zone with speed-torque decoupling before peeling, effectively isolating tension disturbances from the downstream winding system and avoiding problems such as warping, wrinkling, and premature peeling of the base film caused by inconsistent winding tension of the upper and lower electrolyte base films. At the same time, through the coordinated cooperation of the two sets of clamping rollers, this invention provides a larger process window for adjusting the winding tension of the upper and lower electrolytes, significantly reducing the amount of electrolyte residue on the surface of the base film after peeling, resulting in a more uniform transfer effect, better consistency of the composite electrode, and a product yield rate of over 94%. It is applicable to both one-step and two-step peeling methods, has high process stability, good operational convenience, and possesses extremely high industrial application value and prospects for industrialization. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the one-step peeling method in this invention; Figure 2 This is a structural diagram of the two-step peeling method in this invention; Figure 3 This is a flowchart of the present invention; In the diagram: 1. Pressing roller; 2. Drive roller; 3. Clamping roller; 4. Peeling roller; 5. Intermediate roller; 6. Rewinding mechanism. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. The following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Any modifications, equivalent substitutions, or improvements made based on the concept of this invention are within the scope of protection of this invention.

[0021] This invention provides an apparatus and method for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets. For example... Figure 1 and Figure 2As shown, this device is used in the rolling transfer process of all-solid-state batteries to process the composite electrode sheet conveyed from the rolling roller 1 to the stripping roller 4. The composite electrode sheet is a sandwich-like layered structure consisting of an upper electrolyte base film, a middle negative electrode sheet, and a lower electrolyte base film.

[0022] The core technical principle of this invention lies in the following: An upstream clamping group and a downstream clamping group are sequentially set along the conveyor belt direction of the composite electrode between the rolling and peeling processes. Utilizing the coordinated operation of these two clamping rollers, an independent and stable tension isolation zone is formed before the composite electrode enters the peeling roller 4. Specifically, the upstream clamping group employs a speed control mode to establish a precise speed reference for material conveying; the downstream clamping group employs a torque control mode to provide constant resistance and absorb upstream speed fluctuations. Through this speed-torque decoupling control, tension disturbances from the downstream winding system can be effectively isolated, ensuring constant conveyor belt tension of the composite electrode before peeling, thereby fundamentally solving the problems of base film wrinkling and premature peeling caused by tension imbalance. The apparatus and method provided by this invention are applicable to one-step and two-step peeling methods in the fabrication process of all-solid-state batteries.

[0023] like Figure 1 The image shows an application example of the device of the present invention in a one-step peeling method. In the one-step peeling method, the upper and lower electrolyte base films are peeled off simultaneously on the same peeling roller 4. The device includes a rolling mechanism, an upstream clamping group, a downstream clamping group, and a peeling mechanism arranged sequentially along the direction of the composite electrode sheet.

[0024] The rolling mechanism consists of a pair of rolling rollers 1 arranged opposite to each other, used to pressurize and composite the upper and lower electrolyte base films with the middle negative electrode sheet to form a sandwich structure composite electrode sheet.

[0025] The upstream clamping assembly is located downstream of the rolling mechanism and includes a drive roller 2 and a clamping roller 3 arranged opposite each other. The drive roller 2 is a driving steel roller made of alloy steel with a hard chrome plated surface to increase wear resistance and surface finish; the clamping roller 3 is a rubber roller used to provide sufficient clamping force to ensure no relative slippage between the composite electrode sheet and the drive roller 2. The distance between the upstream clamping assembly and the rolling mechanism is 0.4m to 0.5m; in this embodiment, the distance is specifically 0.4m. The upstream clamping assembly is electrically connected to the equipment's control system and uses a speed control mode; the linear speed of its drive roller 2 is based on the production line's reference speed V. line And determined by the preset lead rate α, that is The value of α ranges from 0 to 0.05, and the specific value needs to be set according to the material and thickness of the electrolyte base membrane. This setting provides a precise speed reference for subsequent tension control via the upstream clamping assembly, effectively preventing material accumulation or stretching caused by speed mismatch.

[0026] The downstream clamping group is located downstream of the upstream clamping group, and it also includes a drive roller 2 and a clamping roller 3 arranged opposite each other. Similarly, the drive roller 2 is a driving steel roller made of alloy steel with a hard chrome plated surface, and the clamping roller 3 is a rubber roller. The distance between the upstream clamping group and the downstream clamping group is 0.8m to 1.2m; in this embodiment, the distance is preferably 1.0m. The downstream clamping group is electrically connected to the control system and adopts a torque control mode; the output torque of its drive roller 2 is determined according to the target tension value F. set The diameter D of the downstream clamping assembly drive roller 2 is determined, that is... During operation, the downstream clamping assembly outputs a constant reverse torque, generating a constant resistance to the composite electrode, thereby establishing a stable tension between the upstream and downstream clamping assemblies. Simultaneously, when the speed of the upstream clamping assembly experiences slight fluctuations, the downstream clamping assembly can absorb these fluctuations by dynamically adjusting its own rotational speed, while maintaining a constant output torque, thus achieving a tension isolation effect.

[0027] The peeling mechanism is located downstream of the downstream clamping group and includes at least one peeling roller 4. The distance between the downstream clamping group and the peeling roller 4 is 0.1m to 0.3m, and in this embodiment, the distance is preferably 0.2m. After passing through the downstream clamping group, the composite electrode sheet enters the peeling roller 4 under constant tension. Here, the upper and lower electrolyte base films are peeled off simultaneously and guided to their respective winding mechanisms 6 via intermediate rollers 5 for winding.

[0028] like Figure 2 The diagram illustrates an application example of the device of the present invention in a two-step peeling method. In the two-step peeling method, the upper electrolyte base film is preferentially peeled off by the first peeling roller, and the lower electrolyte base film is subsequently peeled off by the second peeling roller. The main difference from the one-step peeling method is that the peeling mechanism includes a first peeling roller and a second peeling roller arranged sequentially along the conveyor belt direction, respectively used to peel off the upper and lower electrolyte base films; correspondingly, the winding mechanism 6 includes a first winding mechanism and a second winding mechanism. In this embodiment, the installation position, control method, and spacing parameters of the upstream clamping group (drive roller 2 and clamping roller 3) and the downstream clamping group (drive roller 2 and clamping roller 3) of the present invention are the same as those in the one-step peeling method, and are all located between the rolling mechanism and the first peeling roller to establish a constant tension isolation zone before the peeling process. Before the composite electrode enters the first peeling roller, its tension has been precisely controlled by the device of the present invention. Therefore, whether it is the first or second peeling step, the problem of base film wrinkling or premature peeling caused by uneven tension can be effectively avoided.

[0029] The control of the upstream and downstream clamping groups relies on a closed-loop control system consisting of controllers, drivers, sensors, and actuators. Its core control logic is: the control system controls the production line speed V... line The lead rate α signal is sent to the driver of the upstream clamping group, and the drive roller 2 of the upstream clamping group moves at a fixed speed. Rotate to establish a reference speed; simultaneously, the system converts the target tension F_set into a torque command. The signal is sent to the driver of the downstream clamping assembly, and the drive roller 2 of the downstream clamping assembly outputs constant resistance to establish the target tension; the drive roller 2 of the downstream clamping assembly automatically accelerates to V. down =V+ This creates a stable tension and establishes tension F. When the upstream speed fluctuates, the downstream clamping assembly absorbs the fluctuation by changing its own rotation speed, while the output torque remains unchanged, thus ensuring constant tension and achieving the tension isolation effect.

[0030] The present invention also provides a method for improving the wrinkling deformation and premature peeling of transfer composite electrodes. In one specific embodiment, the method includes the following steps: Step S1: Threading and preparation steps.

[0031] Prepare the negative electrode sheet to be transferred and the upper and lower solid electrolyte base films. According to... Figure 1 or Figure 2 The conveyor path shown transports each strip to the transfer mechanism. It ensures that the composite electrode sheet (i.e., the three-layer structure after rolling) passes sequentially through the upstream clamping group (between the drive roller 2 and the clamping roller 3) and the downstream clamping group (between the drive roller 2 and the clamping roller 3). The conveyor speed of the composite electrode sheet is 2 m / min to 6 m / min, preferably 4 m / min in this embodiment.

[0032] Step S2: Equipment startup and correction procedures.

[0033] Start the transfer equipment at the preset belt speed V. line Continuously convey electrode sheets and electrolyte base membranes. Adjust the alignment system of the electrode sheets and the upper and lower electrolyte base membranes to ensure accurate positioning of each conveyor belt and smooth operation.

[0034] Step S3: Rolling and compounding step.

[0035] The rolling mechanism, namely a pair of rolling rollers 1, is activated to apply a preset rolling pressure, which tightly combines the upper and lower electrolyte base films with the middle negative electrode sheet to form a sandwich structure composite electrode sheet.

[0036] Step S4: Tension isolation and control steps.

[0037] Start the upstream and downstream clamping groups. First, the control system sets the production line speed V...line The lead rate α signal is sent to the driver of the upstream clamping group, and the drive roller 2 of the upstream clamping group moves at a fixed speed. Rotation establishes a speed reference for material conveying, where α ranges from 0 to 0.05, specifically set based on the base film material and thickness. Next, the system sets the target tension F... set Convert to torque command The torque is sent to the driver of the downstream clamping group, causing the drive roller 2 of the downstream clamping group to output a constant reverse torque, applying a constant resistance to the composite electrode sheet, where D is the diameter of the drive roller 2 of the downstream clamping group. At this time, the rotational speed of the drive roller 2 of the downstream clamping group will automatically be finely adjusted to a stable value, thereby establishing a constant tensile tension F between the upstream and downstream clamping groups, achieving complete isolation from the downstream winding tension. In this step, through real-time feedback and dynamic adjustment, even if there are slight fluctuations in the upstream speed, the downstream clamping group will absorb the fluctuations by changing its own rotational speed, while the output torque remains unchanged, thus ensuring constant tension.

[0038] Step S5: Peeling and winding steps.

[0039] After tension regulation, the composite electrode sheet enters the stripping roller 4 in a flat, wrinkle-free state (a single stripping roller 4 in the one-step method, and the first stripping roller followed by the second stripping roller in the two-step method). At the stripping roller 4, the solid electrolyte layer separates from the base film, and the electrolyte material is completely transferred to the surface of the electrode sheet, while the stripped base film is wound up by its respective winding mechanism 6.

[0040] To better illustrate the technical effects of the present invention, specific embodiments and comparative examples are provided below for verification. All embodiments and comparative examples use the same negative electrode sheet and electrolyte base film material.

[0041] Example 1 Using the present invention as follows Figure 1 The one-step peeling apparatus shown above, along with steps S1 to S5, performs the transfer printing. The process parameters are set as follows: belt speed V... line = 4m / min, the lead rate α of the upstream clamping group = 0.03, the target tension F of the downstream clamping group set = 100N. The distance between the upstream clamping group and the downstream clamping group is 1.0m, the distance between the downstream clamping group and the stripping roller is 0.2m, and the distance between the upstream clamping group and the rolling roller is 0.4m. The drive roller 2 is made of alloy steel with hard chrome plating, and the clamping roller 3 is a rubber roller.

[0042] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the upstream clamping group and the downstream clamping group are not activated, that is, no tension isolation device is used. The composite electrode sheet enters the peeling roller 4 directly after being rolled, and the downstream winding tension acts directly on the composite electrode sheet before peeling.

[0043] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that only the upstream clamping group (upstream speed control roller) is activated, while the downstream clamping group is not activated. That is, only the speed of the composite electrode is controlled, without the subsequent tension control roller group.

[0044] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that only the downstream clamping group (downstream tension control roller) is activated, while the upstream clamping group is not activated. That is, only the composite electrode sheet is subjected to single tension control, and the establishment of an upstream speed reference is lacking.

[0045] Performance tests were conducted on the transfer products obtained in Example 1 and Comparative Examples 1 to 3. The test indicators included: Residual base membrane: Take a sample of the electrolyte base membrane after peeling and weigh the weight of the residual solid electrolyte material per unit area (mg / cm²). 2 The lower the value, the better the transfer effect and the more complete the transfer of electrolyte material.

[0046] Product yield rate: The percentage of qualified products that are free of wrinkles and serious base film residue defects during continuous production.

[0047] Transfer speed: The maximum belt speed at which stable production can be achieved.

[0048] The test results are summarized in Tables 1 and 2.

[0049] Table 1

[0050] Table 2

[0051] From the data in Tables 1 and 2, we can see that: Comparing Example 1 and Comparative Example 1, it can be seen that... When using any tension-isolating device, the base film residue is extremely high (average 1.25 mg / cm³). 2 The yield rate was extremely low (only 34.9%), and stable production could not be achieved at a high speed (4m / min), indicating that the technical solution of this invention plays a decisive role in improving the transfer effect.

[0052] Comparing Example 1 and Comparative Example 2, it can be seen that when only the upstream speed control roller is used, although the yield rate is improved to 75.5%, the base film residue (average 1.04 mg / cm³) is lower.2 The result is still significantly higher than that of the present invention, indicating that the lack of downstream constant tension control makes it impossible to effectively isolate the winding tension, and the problem of incomplete transfer still exists.

[0053] Comparing Example 1 and Comparative Example 3, it can be seen that when only the downstream tension control roller is used, the amount of base film residue (average 0.28 mg / cm³) is significantly reduced. 2 Both the yield and the overall yield (83.5%) were better than those of Comparative Examples 1 and 2, but still lower than those of this invention. This indicates that without an upstream speed roller providing a precise speed reference, the stability of the downstream tension roller was affected, resulting in an overall yield that could not reach the level of this invention.

[0054] Example 1 of the present invention achieves the lowest base film residue (average 0.29 mg / cm³). 2 The highest yield (94.2%) and excellent high-speed production stability fully demonstrate the superiority of speed-torque decoupling control brought about by the coordinated cooperation between the upstream clamping group and the downstream clamping group.

[0055] In summary, by setting up upstream and downstream clamping groups with specific control modes, this invention effectively solves the technical problem of wrinkling and deformation of transfer composite electrodes before peeling and premature peeling, significantly improving product yield and production efficiency, and possessing extremely high industrial application value.

[0056] For those skilled in the art, various improvements and modifications can be made without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. An apparatus for improving the wrinkling and premature peeling of transfer composite electrode sheets, used in the transfer process to process composite electrode sheets conveyed from a pressing roller (1) to a peeling roller (4), characterized in that, include: Along the belt-carrying direction of the composite electrode sheet, an upstream clamping group and a downstream clamping group are sequentially arranged between the rolling roller (1) and the stripping roller (4); The upstream clamping group and the downstream clamping group each include an active roller (2) and a clamping roller (3) arranged opposite to each other, and the composite electrode passes between the active roller (2) and the clamping roller (3); The upstream clamping assembly is configured to use a speed control mode to transport the composite electrode sheet at a preset constant linear speed. The downstream clamping assembly is configured to employ a torque control mode to apply a constant resistance to the composite electrode to establish and maintain a constant tension between the upstream clamping assembly and the downstream clamping assembly.

2. The apparatus for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets according to claim 1, characterized in that, The linear velocity of the drive roller (2) of the upstream clamping assembly Determined by the following formula: , where V line is the normal running speed of the pole piece, and a is the advance rate, and 0 < a ≤ 0.

05.

3. The apparatus for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets according to claim 1, characterized in that, The output torque of the drive roller (2) of the downstream clamping assembly Determined by the following formula: ， Among them, F set The target tension value is D, and the diameter of the drive roller (2) of the downstream clamping assembly is D.

4. The apparatus for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets according to any one of claims 1 to 3, characterized in that, The distance between the upstream clamping group and the downstream clamping group is 0.8m to 1.2m.

5. The apparatus for improving the wrinkle deformation and premature peeling of transfer composite electrode sheets according to any one of claims 1 to 3, characterized in that, The distance between the downstream clamping assembly and the stripping roller (4) is 0.1m to 0.3m.

6. The apparatus for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets according to any one of claims 1 to 3, characterized in that, The distance between the upstream clamping assembly and the rolling roller (1) is 0.4m to 0.5m.

7. The apparatus for improving the wrinkling deformation and premature peeling of transfer composite electrode sheets according to any one of claims 1 to 3, characterized in that, The active roller (2) is made of alloy steel with hard chrome plating, and the clamping roller (3) is a rubber roller.

8. A method for improving the wrinkling deformation and premature peeling of transfer composite electrodes, characterized in that, Includes the following steps: S1: The composite electrode sheet formed after rolling is passed through the upstream clamping group and the downstream clamping group arranged along the conveyor belt direction in sequence. The composite electrode sheet is a sandwich layered structure composed of an upper electrolyte base film, an intermediate electrode sheet and a lower electrolyte base film. S2: Activate the upstream clamping assembly and adopt the speed control mode to transport the composite electrode sheet at a preset constant linear speed; S3: Activate the downstream clamping group and adopt torque control mode to apply constant resistance to the composite electrode, thereby establishing constant tension between the upstream clamping group and the downstream clamping group; S4: The composite electrode sheet after passing through the downstream clamping group is conveyed to the peeling roller (4) for peeling off the electrolyte base film.

9. The method for improving the wrinkle deformation and premature peeling of transfer composite electrode sheets according to claim 8, characterized in that, In step S2, the linear velocity of the driving roller (2) of the upstream clamping assembly... Determined by the following formula: ;; Among them, V line The normal travel speed of the electrode is α, and the lead rate is 0 < α ≤ 0.05; In step S3, the output torque M of the driving roller (2) of the downstream clamping assembly set Determined by the following formula: ， Among them, F set The target tension value is D, and the diameter of the drive roller (2) of the downstream clamping assembly is D.

10. The method for improving the wrinkle deformation and premature peeling of transfer composite electrodes according to claim 8 or 9, characterized in that, In step S1, the conveying speed of the composite electrode is 2 m / min to 6 m / min.

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