Roller press pole piece thickness control method and roller press control system

Abstract

The invention relates to a roller press pole piece thickness control method and a roller press control system. The control method comprises the steps that the running speed of a roller press is detected in real time; according to the detected speed change, the rolling pressure is adjusted according to a preset gradient so as to change the thickness of the pole piece; and the rolling pressure is adjusted according to the pole piece thickness detected in real time. By detecting and adjusting the rolling pressure in real time, the consistency of the thickness of the pole piece is improved, and the battery performance is ensured, so that the yield of products is increased, the production efficiency is improved, the rejection rate is reduced, and the safety risk is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium battery processing, in particular to a roll press pole piece thickness control method and a roll press control system. BACKGROUND

[0002] With the improvement of the lithium battery manufacturing precision requirement, the roll pressing process needs to dynamically adjust the pressure in the acceleration and deceleration process to guarantee the thickness consistency.

[0003] In the related art, the roll pressing pressure is maintained at a constant value when accelerating and decelerating, so that the thickness significantly fluctuates when the speed changes. Alternatively, the pressure is manually increased after the roll pressing equipment is stably operated, and the pole piece material is lost during this period. The above-mentioned method causes the pole piece thickness to be uneven, shortens the battery life, accelerates the electrical performance decay, reduces the yield, increases the material loss, and reduces the production efficiency. At the same time, the insufficient adhesion of the pole piece causes the powder to fall off, and in the process, the winding lug is misaligned.

[0004] In summary, the roll pressing process in the prior art cannot dynamically adjust the roll pressing pressure, resulting in uneven pole piece thickness, poor quality and other problems. SUMMARY

[0005] Therefore, it is necessary to provide a method for dynamically adjusting the roll pressing pressure to solve the problem of uneven pole piece thickness caused by the inability to adjust the pressure in the existing roll pressing process.

[0006] A roll press pole piece thickness control method comprises the following steps:

[0007] Real-time detection of the running speed of the roll press;

[0008] According to the detected speed change, the roll pressing pressure is adjusted according to a preset gradient to change the pole piece thickness;

[0009] According to the real-time detected pole piece thickness, the roll pressing pressure is adjusted.

[0010] In one embodiment, in the step of adjusting the roll pressing pressure according to the detected speed change, the preset gradient is that the pressure increases by 0.2T for every 1m / min increase in speed.

[0011] In one embodiment, the adjustment range of the roll pressing pressure is 70T to 84T, and the corresponding speed range is 10m / min to 80m / min.

[0012] In one embodiment, it further comprises calculating the rolling parameters based on the rolling formula.

[0013] The rolling parameters include the rolling amount, and the rolling amount satisfies the formula ; wherein Δh is the rolling amount, h0 is the thickness before rolling, h1 is the thickness after rolling, R is the roll radius, and a is the bite angle.

[0014] In one of the embodiments, the rolling parameters are calculated based on a rolling formula.

[0015] The rolling parameters include rolling time, which satisfies the formula ; wherein t is the rolling time, is the length of the deformation zone, and v is the rolling speed.

[0016] In one of the embodiments, the length of the deformation zone satisfies the formula .

[0017] In one of the embodiments, in the step of adjusting the rolling pressure according to the real-time detected thickness of the pole piece, the step includes:

[0018] When the detected real-time thickness is greater than the preset thickness, the pressure is controlled to increase;

[0019] When the detected real-time thickness is less than the preset thickness, the pressure is controlled to decrease.

[0020] In one of the embodiments, the rolling gap is adjusted according to the real-time thickness detection result.

[0021] When the detected real-time thickness is greater than the preset thickness, the rolling gap is controlled to decrease;

[0022] When the detected real-time thickness is less than the preset thickness, the rolling gap is controlled to increase.

[0023] The pole piece thickness control method of the rolling machine improves the consistency of the pole piece thickness by real-time detection and adjustment of the rolling pressure, ensures the battery performance, thereby increasing the product yield, improving the production efficiency, reducing the scrap rate, and avoiding safety risks.

[0024] According to another object of the present application, a rolling machine control system is also provided, which applies the pole piece thickness control method of the rolling machine as described above, and includes:

[0025] A speed detection module is configured to detect the running speed of the rolling machine in real time.

[0026] A pressure detection module is configured to detect the rolling pressure in real time.

[0027] A thickness detection module is configured to detect the thickness of the pole piece in real time.

[0028] A control module is configured to adjust the rolling pressure according to the speed change or the thickness detection result.

[0029] In one of the embodiments, the control module includes:

[0030] A rolling time calculation unit is configured to calculate the rolling time based on the formula The rolling time is calculated; wherein t is the rolling time, is the deformation zone length, and v is the rolling speed;

[0031] The rolling amount is calculated by the formula The rolling amount is calculated by the formula

[0032] The parameter compensation unit is used to adjust the rolling pressure according to the rolling time or the rolling amount.

[0033] The above rolling mill control system can detect the running speed, the rolling pressure and the thickness of the pole piece of the rolling mill in real time, and dynamically adjust the rolling pressure according to the calculation results of the rolling time and the rolling amount, so that the consistency of the thickness of the pole piece is greatly improved, the product yield is improved, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The above rolling mill control system can detect the running speed, the rolling pressure and the thickness of the pole piece of the rolling mill in real time, and dynamically adjust the rolling pressure according to the calculation results of the rolling time and the rolling amount, so that the consistency of the thickness of the pole piece is greatly improved, the product yield is improved, and the production efficiency is improved. Figure 1 .

[0035] Figure 2 The above rolling mill control system can detect the running speed, the rolling pressure and the thickness of the pole piece of the rolling mill in real time, and dynamically adjust the rolling pressure according to the calculation results of the rolling time and the rolling amount, so that the consistency of the thickness of the pole piece is greatly improved, the product yield is improved, and the production efficiency is improved. Figure 2 . DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one feature. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In the present application, unless otherwise expressly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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 internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise expressly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0041] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of description, and do not represent the only implementation.

[0042] The conventional rolling process has a fixed pressure or waits for the device to stabilize before increasing the pressure during acceleration and deceleration stages. This approach can lead to uneven thickness of the pole piece, reduced battery performance, low yield, increased cost, safety risks, and other problems.

[0043] Referring to Figure 1 , Figure 1A flowchart of a roll press pole piece thickness control method in an embodiment of the present application is shown Figure 1 .

[0044] An embodiment of the present application provides a roll press pole piece thickness control method, which improves the consistency of the pole piece thickness by real-time detection and dynamic adjustment of the roll pressing pressure, thereby improving the battery quality and production efficiency.

[0045] In the present embodiment, the roll press pole piece thickness control method comprises the following steps:

[0046] Step S1, real-time detection of the running speed of the roll press;

[0047] Step S2, according to the detected speed change, adjusting the roll pressing pressure according to the preset gradient to change the pole piece thickness;

[0048] Step S3, adjusting the roll pressing pressure according to the real-time detected pole piece thickness.

[0049] The positive pole piece and the negative pole piece of a lithium battery are produced by a roll press. In the present embodiment, the negative pole piece is taken as an example. The roll press is equipped with a speed sensor and a thickness sensor. The speed sensor is used to real-time detect the running speed of the roll press, and the thickness sensor is used to real-time detect the thickness of the pole piece. At the same time, the control system of the roll press can feedback the data from the speed sensor and the thickness sensor, and adjust the roll pressing pressure according to the preset gradient to change the pole piece thickness.

[0050] After the roll press starts running, the speed sensor detects the running speed of the roll press and transmits the detected speed data to the control system of the roll press in real time.

[0051] The control system pre-sets the roll pressing pressure gradient corresponding to different speed intervals. When the speed data fed back by the speed sensor changes, the control system will adjust the roll pressing pressure according to the preset gradient according to the interval where the current speed is located.

[0052] When the roll press starts accelerating from static and the speed gradually increases from zero to a certain preset speed, the control system does not adjust the roll pressing pressure. When the speed reaches the preset speed, the control system starts to adjust the roll pressing pressure according to the preset gradient corresponding to the speed and the pressure, so that the roll pressing pressure can be dynamically adjusted with the change of the speed during the acceleration and deceleration process, thereby changing the thickness of the pole piece and keeping the thickness relatively stable during the acceleration and deceleration stage.

[0053] During the rolling process, the thickness sensor detects the thickness of the pole piece in real time and feeds the thickness data back to the control system. The control system compares the real-time detected thickness of the pole piece with the preset target thickness. For example, if the real-time detected thickness of the pole piece is greater than the target thickness, it means that the current rolling pressure is too large, and the control system will appropriately reduce the rolling pressure; if the real-time detected thickness of the pole piece is less than the target thickness, it means that the current rolling pressure is too small, and the control system will appropriately increase the rolling pressure.

[0054] As described above, the pole piece thickness control method of the rolling machine improves the consistency of the pole piece thickness by real-time detection and dynamic adjustment of the rolling pressure, which can effectively reduce the decline in battery performance, cost increase, safety risk and process problems caused by unreasonable pressure control, thereby increasing the product yield, improving the production efficiency, reducing the scrap rate, and reducing the safety risk of pole piece powder falling.

[0055] In combination with Figure 2 as shown, Figure 2 the flowchart of the pole piece thickness control method of the rolling machine provided in an embodiment of the present application Figure 2 In some embodiments, in the step S2 of adjusting the rolling pressure according to the detected speed change at a preset gradient, the step S21 includes that the preset gradient is that the pressure increases by 0.2T for each 1m / min increase in speed. The adjustment range of the rolling pressure is 70T to 84T, and the corresponding speed range is 10m / min to 80m / min.

[0056] Specifically, the preset gradient is that the pressure increases by 0.2T for each 1m / min increase in rolling speed. The adjustment range of the rolling pressure is 70T to 84T, and the corresponding speed range is 10m / min to 80m / min. When the speed data fed back by the speed sensor changes, the control system adjusts the rolling pressure according to the current running speed and the preset gradient.

[0057] In this embodiment, when the rolling machine starts running, the speed is 10m / min, at which time the rolling pressure is set to 70T according to the preset gradient rule.

[0058] As the rolling machine accelerates, the speed gradually increases. When the speed increases from 10m / min to 11m / min, the control system increases the rolling pressure from 70T to 70T+0.2T=70.2T according to the preset gradient; when the speed continues to increase to 12m / min, the rolling pressure is further adjusted to 70.2T+0.2T=70.4T, and so on. When the speed reaches 80m / min, the rolling pressure reaches the maximum value of 84T.

[0059] When the roller press starts to run at a reduced speed, the speed gradually decreases. For example, when the speed decreases from 80 m / min to 79 m / min, the control system reduces the roller pressure from 84T to 84T-0.2T=83.8T; when the speed continues to decrease to 78 m / min, the roller pressure is adjusted to 83.8T-0.2T=83.6T. In this way, until the speed decreases to 10 m / min, the roller pressure returns to the initial value of 70T.

[0060] In one of the embodiments, the roller press pole thickness control method further comprises calculating rolling parameters based on a rolling formula. The rolling parameters include a rolling amount, and the rolling amount satisfies the formula ; wherein Δh is the rolling amount, h0 is the pre-rolling thickness, h1 is the post-rolling thickness, R is the roll radius, and a is the bite angle.

[0061] Specifically, the rolling formula is a formula for calculating the rolling amount, that is, . Wherein Δh is the rolling amount, representing the thickness reduction of the pole during rolling. h0 is the pre-rolling thickness, that is, the initial thickness of the pole before entering the roller press. h1 is the post-rolling thickness, that is, the actual thickness of the pole after rolling by the roller press. R is the roll radius, which is a fixed parameter of the roller press roll. a is the bite angle, which is the angle formed by the pole entering the roll and the center line of the roll.

[0062] If the post-rolling thickness h1 is the preset thickness, given the pre-rolling thickness h0 and the roll radius R, the bite angle a can be deduced by the formula . By adjusting the bite angle to the calculated angle, the post-rolling thickness can be preliminarily controlled to reach the preset thickness.

[0063] If the post-rolling thickness does not match the preset thickness, first calculate the current bite angle a according to the post-rolling thickness. Then compare it with the theoretical bite angle a corresponding to the preset thickness, and adjust according to the deviation of the two bite angles. For example, if the post-rolling thickness is greater than the preset thickness, it is because the bite angle is too large, resulting in a smaller rolling amount, so the bite angle needs to be reduced to make the post-rolling thickness reach the preset thickness. If the post-rolling thickness is less than the preset thickness, it is because the bite angle is too small, resulting in a larger rolling amount, so the bite angle needs to be increased to control the post-rolling thickness to reach the preset thickness.

[0064] In one of the embodiments, it further comprises calculating rolling parameters based on a rolling formula. The rolling parameters include a rolling time, and the rolling time satisfies the formula ; wherein t is the rolling time, is the deformation zone length, and v is the roller pressing speed.

[0065] The deformation zone length satisfies the formula The deformation zone length can be understood as the length of the area where the electrode contacts the roll and deforms in the rolling direction.

[0066] Specifically, according to the formula It can be seen that, with the bite angle α remaining constant, the larger the roll radius R, the longer the deformation zone. The longer. Or, within the range of 0-90°, the larger the bite angle α, the longer the deformation zone. The longer.

[0067] According to the formula It can be seen that the length of the deformation zone With the rolling speed v remaining constant, the higher the rolling speed v, the shorter the rolling time t, and consequently, the thicker the electrode sheet. In this case, it is necessary to increase the rolling pressure to reduce the electrode sheet thickness in order to maintain the preset thickness.

[0068] Combination Figure 2 As shown, Figure 2 This is a flowchart illustrating the roller press electrode thickness control method provided in one embodiment of this application. ​ .

[0069] In some embodiments, step S3, which adjusts the rolling pressure based on the real-time detected electrode thickness, includes step S31: when the detected real-time thickness is greater than a preset thickness, controlling the pressure to increase; when the detected real-time thickness is less than a preset thickness, controlling the pressure to decrease.

[0070] Specifically, the thickness sensor detects the thickness of the electrode sheet in real time and feeds the data back to the control system. The control system compares the real-time detected electrode sheet thickness with the preset target thickness and adjusts the rolling pressure based on the comparison result.

[0071] When the real-time electrode thickness reported by the thickness sensor is greater than the preset target thickness, it indicates that the current rolling pressure is insufficient to compact the electrode to the target thickness. The control system will then issue a command to increase the pressure of the hydraulic system of the roller press.

[0072] When the real-time electrode thickness reported by the thickness sensor is less than the preset target thickness, it indicates that the current rolling pressure is too high, causing the electrode to be over-compacted. The control system will then issue a command to control the hydraulic system of the roller press to reduce the pressure.

[0073] In this embodiment, the preset thickness of the electrode is 113 μm. If the real-time detected electrode thickness is greater than 113 μm, the rolling pressure is initially increased according to the gradient corresponding to the current operating speed and pressure to control the electrode thickness to maintain the preset thickness. If the real-time detected electrode thickness is less than 113 μm, the rolling pressure is initially decreased according to the gradient corresponding to the current operating speed and pressure to control the electrode thickness to maintain the preset thickness and ensure the consistency of the electrode thickness.

[0074] In one embodiment, the roll gap is adjusted according to the real-time thickness detection result. Specifically, when the detected real-time thickness is greater than the preset thickness, the roll gap is controlled to decrease; and when the detected real-time thickness is less than the preset thickness, the roll gap is controlled to increase.

[0075] Specifically, the thickness sensor detects the thickness of the pole piece in real time and feeds back the data to the control system. The control system compares the real-time detected thickness of the pole piece with the preset target thickness and adjusts the roll gap according to the comparison result.

[0076] The roll gap refers to the minimum vertical distance between two opposite rotating rollers in the dynamic extrusion process. The roll gap determines the thickness after extrusion. When the roll gap decreases, the extrusion is more intense and the thickness of the pole piece decreases; and when the roll gap increases, the thickness of the pole piece increases.

[0077] When the real-time thickness of the pole piece fed back by the thickness sensor is greater than the preset target thickness, it indicates that the current roll gap is too large, resulting in that the pole piece cannot be fully compacted. The control system will issue an instruction to control the roll gap adjusting device of the roller press to decrease the roll gap.

[0078] When the real-time thickness of the pole piece fed back by the thickness sensor is less than the preset target thickness, it indicates that the current roll gap is too small, resulting in that the pole piece is excessively compacted. The control system will issue an instruction to control the roll gap adjusting device of the roller press to increase the roll gap.

[0079] In the embodiment, a roller press control system is used to implement the pole piece thickness control method of the roller press as described above, which comprises:

[0080] A speed detection module is configured to detect the running speed of the roller press in real time.

[0081] A pressure detection module is configured to detect the roller pressing pressure in real time.

[0082] A thickness detection module is configured to detect the thickness of the pole piece in real time.

[0083] A control module is configured to adjust the roller pressing pressure according to the speed change or the thickness detection result.

[0084] Specifically, the roller press control system comprises the speed detection module, the pressure detection module, the thickness detection module and the control module, and the modules communicate with each other through a high-speed data bus to ensure real-time transmission and processing of data.

[0085] The speed detection module adopts a speed sensor installed on the roller press to detect the running speed of the roller press in real time. The sensor converts the detected speed data into an electrical signal and transmits the electrical signal to the control module through the data bus.

[0086] The pressure detection module adopts a pressure sensor installed in the hydraulic system of the roller press for real-time detection of the roller pressing pressure. The sensor converts the detected pressure data into an electrical signal and transmits it to the control module through a data bus.

[0087] The thickness detection module adopts a laser thickness detector or an X-ray thickness detector, etc. installed at the outlet of the roller press for real-time detection of the thickness of the pole piece. The detection device converts the detected thickness data into an electrical signal and transmits it to the control module through a data bus.

[0088] The control module adopts a programmable logic controller (PLC) or an industrial computer with data processing and control capabilities. The control module receives data from the speed detection module, pressure detection module and thickness detection module, and calculates the roller pressing pressure value that needs to be adjusted according to the preset speed and pressure gradient and rolling formula, and then sends control instructions to the hydraulic system of the roller press through a data bus to realize dynamic adjustment of the roller pressing pressure.

[0089] In the specific implementation process, the speed detection module continuously detects the running speed of the roller press and transmits the detected speed data to the control module in real time. The control module adjusts the roller pressing pressure according to the preset speed gradient and pressure adjustment relationship according to the speed change. The pressure detection module and the thickness detection module respectively detect the roller pressing pressure and the thickness of the pole piece in real time and feed back the data to the control module. The control module compares the real-time detected roller pressing pressure and pole piece thickness with the preset target value. The control module adjusts the roller pressing pressure according to the thickness detection result.

[0090] In one embodiment, the control module includes:

[0091] a rolling time calculation unit for calculating rolling time based on the formula

[0092] a rolling amount calculation unit for calculating rolling amount based on the formula

[0093] a parameter compensation unit for adjusting the roller pressing pressure according to the rolling time or the rolling amount.

[0094] Specifically, the control module includes a rolling time calculation unit, a rolling amount calculation unit and a parameter compensation unit. The rolling time calculation unit calculates the rolling time based on the formula where t is the rolling time, is the deformation zone length, and v is the roller pressing speed. The deformation zone length satisfies the formula where R is the roll radius and a is the bite angle.

[0095] The rolling amount calculation unit calculates the rolling amount based on the formula ​​The rolling amount is calculated, wherein Δh is the rolling amount, h0 is the thickness before rolling, and h1 is the thickness after rolling.

[0096] The parameter compensation unit is used to adjust the rolling pressure according to the rolling time or the rolling amount. It can be understood that the shorter the rolling time is, the faster the rolling speed is, and the thicker the pole piece is. At this time, the rolling pressure needs to be adjusted to control the pole piece thickness to reach the preset thickness. Alternatively, if the rolling amount is too small, it means that the rolling pressure is insufficient, and the pole piece thickness is large. At this time, the rolling pressure needs to be increased to adjust the pole piece thickness.

[0097] The control module adjusts the rolling pressure in real time according to the calculation results of the rolling time calculation unit, the rolling amount calculation unit and the parameter compensation unit. At the same time, the control module also continuously receives feedback data from the speed detection module, the pressure detection module and the thickness detection module to form a closed-loop control system, ensuring the consistency and stability of the pole piece thickness.

[0098] In summary, the above-mentioned rolling machine control system can detect the running speed of the rolling machine, the rolling pressure and the pole piece thickness in real time, and dynamically adjust the rolling pressure according to the calculation results of the rolling time and the rolling amount, so that the consistency of the pole piece thickness is greatly improved, the product yield is improved, and the production efficiency is improved.

[0099] Each technical feature of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of each technical feature in the above-mentioned embodiments are not described, but as long as the combination of these technical features does not exist, it should be considered as the scope of the present application.

[0100] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent application of the present application should be subject to the appended claims.

Claims

1. A method for controlling the thickness of electrode sheets in a roller press, characterized in that, include: Real-time monitoring of the roller press's operating speed; Based on the detected speed changes, the rolling pressure is adjusted according to a preset gradient to change the electrode thickness; Adjust the rolling pressure based on the real-time detected electrode thickness.

2. The method for controlling the thickness of electrode sheets in a roller press according to claim 1, characterized in that, The step of adjusting the roller pressure according to a preset gradient based on the detected speed change includes: the preset gradient is that the pressure increases by 0.2T for every 1m / min increase in speed.

3. The method for controlling the thickness of electrode sheets in a roller press according to claim 2, characterized in that, The roller pressure is adjustable from 70T to 84T, corresponding to a speed range of 10m / min to 80m / min.

4. The method for controlling electrode thickness in a roller press according to claim 1, characterized in that, It also includes calculating rolling parameters based on rolling formulas; The rolling parameters include the rolling amount, which satisfies the formula... Where Δh is the rolling amount, h0 is the thickness before rolling, h1 is the thickness after rolling, R is the roll radius, and α is the bite angle.

5. The method for controlling electrode thickness in a roller press according to claim 4, characterized in that, It also includes calculating rolling parameters based on rolling formulas; The rolling parameters include the rolling time, which satisfies the formula... Where t is the rolling time, denoted as , where is the length of the deformation zone and v is the roller pressing speed.

6. The method for controlling electrode thickness in a roller press according to claim 5, characterized in that, The length of the deformation zone satisfies the formula .

7. The method for controlling the thickness of electrode sheets in a roller press according to claim 1, characterized in that, The step of adjusting the rolling pressure based on the real-time detected electrode thickness includes: When the detected real-time thickness is greater than the preset thickness, the pressure is increased. When the detected real-time thickness is less than the preset thickness, the pressure is reduced.

8. The method for controlling electrode thickness in a roller press according to claim 1, characterized in that, It also includes adjusting the roll gap based on real-time thickness detection results; When the detected real-time thickness is greater than the preset thickness, the roll gap is reduced. When the detected real-time thickness is less than the preset thickness, the roll gap is increased.

9. A roller press control system, characterized in that, include: The speed detection module is used to detect the running speed of the roller press in real time; The pressure detection module is used to detect the roller pressure in real time; Thickness detection module, used for real-time detection of electrode thickness; The control module is used to adjust the roller pressure based on speed changes or thickness detection results.

10. The roller press control system according to claim 9, characterized in that, The control module includes: Rolling time calculation unit, based on formula Calculate the rolling time; where t is the rolling time. Where v is the length of the deformation zone and v is the rolling speed; Rolling amount calculation unit, based on formula Calculate the rolling amount; where Δh is the rolling amount, h0 is the thickness before rolling, h1 is the thickness after rolling, R is the roll radius, and α is the bite angle; The parameter compensation unit is used to adjust the roll pressure according to the rolling time or rolling amount.

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