Method for achieving non-stop insertion of inserts during the cell winding process and cell winding equipment

Abstract

The present invention relates to a method for realizing non-stop inserting during the core winding process in the field of new energy battery manufacturing and a core winding device. The method comprises the following steps: the first step is to set a reference angle; the second step is to obtain the starting inserting angle; the third step is to calculate the absolute starting inserting angle B; the fourth step is to obtain the absolute ending inserting angle D; the fifth step is to obtain the total stroke L; the sixth step is to generate an electronic cam motion curve; and the seventh step is to complete non-stop inserting of the core. Through angle parameters and electronic cam technology, precise control of the inserting process is achieved, the quality and efficiency of core winding are improved, non-stop inserting during the core winding process is realized, thereby significantly improving the production efficiency of lithium batteries. At the same time, the continuity and stability of core winding are ensured, the inserting parameters can be flexibly adjusted, it is applicable to core winding processes of different specifications and requirements, the flexibility and applicability of the method are increased, and it has good generality and practical value.

Description

Technical Field

[0001] The present invention relates to the field of new energy battery manufacturing, and specifically to a method for inserting inserts without stopping during the core winding process and a core winding device. Background Art

[0002] In the manufacturing process of lithium batteries, the automatic winding machine plays a crucial role, and its core function is to accurately wind the battery electrode sheets and separator into a core. During the core winding process, the insertion of inserts has a decisive impact on the final quality and safety performance of the core.

[0003] Specifically, the winding step requires that the winding of the core must be uniform, the end face should be kept flat, and at the same time, the winding length and diameter also need to be strictly controlled to ensure that the capacity and size of the battery can meet the established design requirements. If the core is wound too tightly, not only will it be difficult for the electrolyte to penetrate, but it may also cause excessive internal pressure in the core, resulting in adverse consequences such as wrinkles or deformation. Therefore, it is particularly important to insert inserts in a timely manner during the winding process to adjust the winding tightness of the core.

[0004] The main function of the insert is to adjust the tightness of the core during the winding process, thereby effectively preventing a series of problems caused by over-tight winding of the core. By scientifically and reasonably inserting the insert and withdrawing the insert after winding is completed, the area where the insert is inserted and withdrawn during the winding process of the core can maintain an appropriate tightness, which is beneficial to the full penetration of the electrolyte and ensures the uniform distribution of the internal substances of the core.

[0005] In the prior art, core winding devices usually adopt the process of inserting inserts after stopping. This process requires stopping the movement of the winding mechanism after the core is wound to a certain number of turns, and then the program controls the insert mechanism to insert the insert into the periphery of the core wound to a certain number of turns, and then controls the winding mechanism to continue to complete the subsequent winding action. After completing the subsequent winding action, the program controls the insert mechanism to withdraw the insert. However, this process has obvious problems. First, inserting inserts after stopping will interrupt the continuity of core winding, resulting in low production efficiency. Second, if the insertion timing, position, and method of the insert are not properly controlled, when the insert is horizontally inserted into the core, it will contact the core and easily damage the core, affecting the performance and safety of the core.

[0006] At present, there is an urgent need in the industry for a method that can achieve precise insertion of inserts without stopping the machine. However, due to the self-weight of the inserts themselves, they will sag. During the high-speed winding process, the battery cells and the inserts are in a dynamic state. The distances between the inserts and the battery cells at different positions of the battery cells during the high-speed winding process are different. Therefore, it is very difficult for the inserts to accurately align with the optimal insertion position, which easily leads to incorrect position control during the dynamic insertion process of the inserts. In severe cases, it may even damage the already wound electrode sheets. Therefore, how to accurately capture the optimal timing of inserting the inserts, precisely control the movement trajectory of the insert mechanism, and keep it synchronized with the winding needle mechanism in a high-speed winding and complex production environment has become a technical problem to be solved urgently. Summary of the Invention

[0007] The first object of the present invention is to solve the above defects and provide a method for realizing insert insertion without stopping the machine during the battery cell winding process, which realizes insert insertion without stopping the machine during the battery cell winding process and significantly improves the production efficiency of lithium battery cell winding.

[0008] The first object of the present invention is achieved in the following way:

[0009] A method for realizing insert insertion without stopping the machine during the battery cell winding process, the method comprising the following steps:

[0010] First step, set a reference angle. When the winding needle of the winding needle mechanism rotates to a certain angle, it is defined as the reference angle. At this time, the set reference angle is 0°.

[0011] Second step, obtain the start insertion angle. Control the servo motor of the winding needle mechanism to make the winding needle of the winding needle mechanism rotate in the normal winding direction. At this time, the insert mechanism is driven by the winding needle mechanism to rotate synchronously until it is observed that the insert of the insert mechanism deviates in the direction away from the winding needle under the action of its own gravity and centrifugal force. Control the winding needle mechanism to stop rotating, and obtain the rotation angle A of the winding needle mechanism at this time. The rotation angle A of the winding needle mechanism is calculated from the reference angle. After taking the remainder of the rotation angle A and 360°, the start insertion angle a of the insert mechanism to start the insert action is obtained.

[0012] Third step, the program sets the number of turns parameter for the insert mechanism to start the insert action as the Nth turn, and the Nth turn is the number of turns of the winding needle mechanism. When the winding needle mechanism drives the insert mechanism to rotate to the Nth turn, the insert mechanism starts the insert action, and calculates the absolute start insertion angle B using the formula N*360°+a.

[0013] Fourth step, obtain the stroke angle C of the insert of the insert mechanism to complete the entire complete insert action. The stroke angle C refers to the angle rotated by the winding needle mechanism during the period from the start of the insert action to the completion of the insert action of the insert, and calculates the absolute end insertion angle D using the formula B+C.

[0014] Step 5: Obtain the total stroke L of the inserting piece of the inserting piece mechanism from the start of the inserting piece action to the completion of the inserting piece action;

[0015] Step 6: Generate an electronic cam motion curve at the PLC program setting end according to the stroke angle C set in Step 4 and the parameter of the total stroke L in Step 5. The electronic cam motion curve is used to control the inserting piece of the inserting piece mechanism to perform a horizontal inserting piece action according to the trajectory of the electronic cam through the program;

[0016] Step 7: During the winding process of the battery core, when the rotation angle of the winding needle of the winding needle mechanism reaches the absolute start angle B of the inserting piece, the program controls the inserting piece mechanism to drive the inserting piece to insert horizontally into the battery core being wound by the winding needle according to the electronic cam motion curve generated in Step 6 until the rotation angle of the winding needle of the winding needle mechanism reaches the absolute end angle D of the inserting piece, and the inserting piece of the battery core is completed without stopping the machine.

[0017] Further, in the first step, when setting the reference angle, control the winding needle of the winding needle mechanism and the inserting piece of the inserting piece mechanism to be perpendicular to the horizontal plane.

[0018] Further, in the second step, the result of the start inserting piece angle a obtained by taking the remainder of the rotation angle A and 360° is less than 90°.

[0019] Further, in the fourth step, the stroke angle C is not greater than 180°. Within the stroke angle C, it is necessary to ensure that the inserting piece does not interfere with the normal winding action of the battery core from the start of the inserting piece action to the completion of the inserting piece action.

[0020] Further, in the third step, the parameter N of the start inserting piece action is an integer value preset according to the battery core specification and winding requirements.

[0021] Further, when the winding needle of the winding needle mechanism reaches the absolute start angle B, the electronic cam relationship is coupled with the winding needle servo motor as the main shaft and the inserting piece servo motor as the slave shaft.

[0022] Further, in the sixth step, taking the stroke angle C as the maximum value of the abscissa and the total stroke L as the maximum value of the ordinate, establish a two-dimensional coordinate system, and draw a motion curve from the origin to the inserting piece end point in the established two-dimensional coordinate system as the electronic cam motion curve of the inserting piece mechanism. The angle corresponding to the origin in the motion curve is the absolute start angle B, and the angle corresponding to the end point is the absolute end angle D.

[0023] The second object of the present invention is to provide a battery core winding device, which is used to realize the inserting piece without stopping the machine during the winding process of the battery core.

[0024] The second object of the present invention is achieved in the following way:

[0025] The battery cell winding device includes a winding needle mechanism, a tab inserting mechanism, a servo motor and a PLC controller. The PLC controller is configured to execute a method for realizing tab insertion without stopping the machine during the battery cell winding process.

[0026] Further, the tab inserting mechanism includes a driving device and a tab. The driving device is used to drive the tab to move in the horizontal direction.

[0027] Further, it further includes a sensor for detecting the rotation angle of the winding needle mechanism. The sensor is connected to the PLC controller and is used to transmit the detected rotation angle information to the PLC controller.

[0028] The beneficial effects produced by the present invention are as follows:

[0029] 1). By obtaining the key angle parameters of the tab inserting mechanism and the winding needle mechanism, calculating the start and end absolute angles of the tab insertion, and using the electronic cam technology to generate the motion control curve of the tab inserting mechanism. During the battery cell winding process, when the rotation angle of the winding needle reaches the preset value, the tab inserting mechanism is controlled to move synchronously with the winding needle mechanism to realize the precise insertion of the tab. Since the tab will deviate away from the winding needle under the action of its own gravity and centrifugal force during the rotation of the stroke angle C, that is to say, the tab will deviate away from the battery cell being wound by the winding needle during this process, ensuring that the tab will not interfere with the normal battery cell winding action within the total stroke L from the start of the tab insertion action to the completion of the tab insertion action, so as to realize the action process of winding while inserting the tab without damaging the battery cell being wound due to incorrect tab position or improper tab insertion action;

[0030] 2). Through the angle parameters and the electronic cam technology, the precise control of the tab insertion process is realized, improving the quality and efficiency of the battery cell winding, realizing tab insertion without stopping the machine during the battery cell winding process, thus significantly improving the production efficiency of the lithium battery, and at the same time ensuring the continuity and stability of the battery cell winding. The method of the present invention can flexibly adjust the tab insertion parameters, is applicable to the battery cell winding processes with different specifications and requirements, increases the flexibility and applicability of the method, and has good versatility and practical value;

[0031] 3). Using the PLC controller to realize automatic control, reducing the difficulty and cost of manual operation, improving the automation level and production efficiency of the production line. The battery cell winding device of the present invention integrates the above method, has the characteristics of high efficiency, accuracy and stability, is applicable to the production and manufacturing of large-scale lithium battery cells, and has important application value. Description of the Drawings

[0032] Figure 1 It is a three-dimensional structural schematic diagram of the state where the tab and the winding needle in the winding needle mechanism and the tab inserting mechanism of the present invention are both perpendicular to the horizontal plane;

[0033] Figure 2This is a three-dimensional structural schematic diagram of the insertion piece in the winding needle mechanism and the insertion piece mechanism of the present invention falling in a direction away from the winding needle;

[0034] Figure 1 and Figure 2 In, the markings are as follows: 1 - winding needle, 2 - insertion piece.

[0035] Figure 3 This is an electronic cam motion curve graph generated in the first example of the method for realizing non-stop insertion during the core winding process of the present invention;

[0036] Figure 4 This is an electronic cam motion curve graph generated in the second example of the method for realizing non-stop insertion during the core winding process of the present invention;

[0037] Figure 5 This is an electronic cam motion curve graph generated in the third example of the method for realizing non-stop insertion during the core winding process of the present invention;

[0038] Figure 6 This is an electronic cam motion curve graph generated in the fourth example of the method for realizing non-stop insertion during the core winding process of the present invention. Specific embodiments

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] In this embodiment, referring to Figures 1-6 , the method for realizing non-stop insertion during the core winding process specifically implemented includes the following steps:

[0041] In the first step, a reference angle is set. When the winding needle 1 of the winding needle mechanism rotates to a certain angle, it is defined as the reference angle. At this time, the reference angle is set to 0°. In this embodiment, when setting the reference angle, the winding needle 1 of the winding needle mechanism and the insertion piece 2 of the insertion piece mechanism are both perpendicular to the horizontal plane. The reference angle is used to obtain the starting angle of the winding of the winding needle 1 of the winding needle mechanism and the reference angle when the insertion piece 2 of the insertion piece mechanism is vertically upward. This reference angle is set to 0°, and at the same time, the starting angle of the winding of the winding needle 1 of the winding needle mechanism is also set to 0°, so that when the reference angle is 0°, both the insertion piece 2 of the insertion piece mechanism and the winding needle 1 of the winding needle mechanism are perpendicular to the horizontal plane.

[0042] Step 2: Obtain the starting inserting angle. Control the servo motor of the coiling needle mechanism to rotate the coiling needle 1 of the coiling needle mechanism in the normal coiling direction. At this time, the inserting mechanism is driven by the coiling needle mechanism to rotate synchronously. The rotation angle A of the coiling needle mechanism is calculated starting from the reference angle. The current angle of the coiling needle 1 of the coiling needle mechanism gradually increases from the reference angle of 0°, until it is observed that the inserting piece 2 of the inserting mechanism deflects away from the coiling needle under the action of its own gravity and centrifugal force, then control the coiling needle mechanism to stop rotating. At this time, it is necessary to pay attention to observing that the inserting piece 2 of the inserting mechanism falls away from the coiling needle. At this moment, the inserting piece 2 of the inserting mechanism will deflect away from the coiling needle under the action of its own gravity and centrifugal force, and obtain the rotation angle A of the coiling needle mechanism at this time. This rotation angle A is the total angle after the coiling needle rotates a certain number of turns. Because the coiling speed of the coiling needle is fast enough, it is impossible to observe the deflection of the inserting piece within the first turn. That is to say, when the deflection of the inserting piece is observed, the coiling needle has wound several turns, and the rotation angle A has also reached several multiples of 360°.

[0043] After taking the remainder of this rotation angle A with 360°, obtain the starting inserting angle a of the inserting mechanism to start the inserting action. This starting inserting angle is the angle remaining after the rotation angle A is divided by several complete turns. The result of the starting inserting angle a obtained by taking the remainder of the rotation angle A with 360° is less than 90°.

[0044] Step 3: The program sets the number of turns parameter for the inserting mechanism to start the inserting action as the Nth turn. This Nth turn is the number of turns of the coiling needle mechanism. When the coiling needle mechanism drives the inserting mechanism to rotate to the Nth turn, the inserting mechanism starts the inserting action, and use the formula N*360° + a to calculate the absolute starting angle B of the insertion.

[0045] Step 4: Obtain the stroke angle C of the inserting piece 2 of the inserting mechanism to complete the entire complete inserting action. The stroke angle C is not greater than 180°. Within the stroke angle C, it is necessary to ensure that the insertion does not interfere with the normal cell coiling action from the start of the inserting action to the completion of the inserting action. The stroke angle C refers to the angle that the coiling needle mechanism rotates during the period from the start of the inserting action to the completion of the inserting action of the inserting piece, and use the formula B + C to obtain the absolute ending angle D of the insertion. The absolute ending angle D of the insertion refers to the total angle rotated during the entire process from the start of the rotation of the coiling needle mechanism to the completion of the complete inserting action.

[0046] Step 5: Obtain the total stroke L of the inserting piece 2 of the inserting mechanism from the start of the inserting action to the completion of the inserting action. The total stroke L refers to the horizontal movement stroke of the inserting piece during the entire process from the initial position to the completion of the inserting action driven by the servo motor of the inserting mechanism.

[0047] Step 6: Based on the above parameters, generate an electronic cam at the PLC side to control the inserter 2 of the inserting mechanism to achieve the horizontal inserting action. Specifically, at the PLC program setting end, generate the electronic cam motion curve according to the stroke angle C set in Step 4 and the total stroke L parameter in Step 5. The electronic cam motion curve is used to control the inserter 2 of the inserting mechanism to achieve the horizontal inserting action according to the trajectory of the electronic cam through the program. When the needle winding 1 of the needle winding mechanism reaches the starting absolute angle B, the electronic cam relationship will be coupled with the needle winding servo motor as the main axis and the inserter servo motor as the slave axis.

[0048] Step 7: During the cell winding process, when the rotation angle of the needle winding 1 of the needle winding mechanism reaches the inserting starting absolute angle B, the program controls the inserting mechanism to drive the inserter to insert horizontally into the cell being wound by the needle winding according to the electronic cam motion curve generated in Step 6. At this time, the inserter is horizontally pushed to the periphery of the cell until the rotation angle of the needle winding 1 of the needle winding mechanism reaches the inserting ending absolute angle D, completing the non-stop inserting of the cell. While inserting, the cell winding continues, enabling the pole piece and the separator to continue winding around the inserter and the periphery of the cell to the expected number of turns. Finally, the cell winding is completed, and the inserter is withdrawn by the inserting mechanism. At the same time, the pole piece and the separator are cut off by the cutting mechanism.

[0049] Example 1: First, set the reference angle when the inserter 2 of the inserting mechanism is vertically upward and the needle winding 1 of the needle winding mechanism is vertically upward to 0°. Then control the servo motor of the needle winding mechanism to make the needle winding rotate at a preset speed. When the needle winding rotates to 780°, it is observed that the inserter begins to deflect away from the needle winding under the action of its own gravity and centrifugal force. At this time, stop the rotation of the needle winding and record the current needle winding rotation angle A as 780°. Take the remainder of 780° and 360° to obtain the starting inserting angle a as 60°. Next, set the number of turns parameter for the inserter to start inserting as the 6th turn. According to the formula: 6 * 360 + 60°, calculate the starting absolute angle B for inserting as 2220°. Then set the stroke angle C for the inserter to complete the entire inserting action as 180°. According to the formula: B + C corresponding to 2220° + 180°, calculate the ending absolute angle D for inserting as 2400°. At the same time, record the total stroke L from the initial position to the completion position of the inserter as 190 mm. Based on the above parameters, generate an electronic cam at the PLC side. Take the stroke angle C of 180° as the maximum value of the abscissa and the total stroke L of 190 mm as the maximum value of the ordinate to establish a two-dimensional coordinate system, as Figure 3As shown, in the established two-dimensional coordinate system, the motion curve from the origin to the end point of the insert is drawn as the electronic cam motion curve of the insert mechanism. The angle corresponding to the origin in the motion curve is the starting absolute angle B, which is 2220°, and the angle corresponding to the end point is the ending absolute angle D, which is 2400°. When the winding needle rotates to 2220°, the winding needle servo motor is used as the main axis and the insert servo motor is used as the slave axis for electronic cam coupling. During the normal cell winding process, when the winding needle rotates to 2220°, the insert mechanism starts to insert the insert under the control of the electronic cam; when the winding needle rotates to 2400°, the insert mechanism completes the insert action, realizing insert without stopping the machine. While inserting the insert, the cell winding continues, enabling the electrode sheet and the separator to continue winding around the insert and the periphery of the cell to the expected number of turns. Finally, the cell winding is completed, and the insert is withdrawn by the insert mechanism. At the same time, the electrode sheet and the separator are cut off by the cutting mechanism.

[0050] Example 2: First, set the reference angle when the insert 2 of the insert mechanism is vertically upward and the winding needle 1 of the winding needle mechanism is vertically upward to 0°. Then control the servo motor of the winding needle mechanism to make the winding needle rotate at a preset speed. When the winding needle rotates to 1160°, it is observed that the insert starts to deflect away from the winding needle under the action of its own gravity and centrifugal force. At this time, stop the rotation of the winding needle, and record the current winding needle rotation angle A as 1160°. Take the remainder of 1160° and 360°, and get the starting insert angle a as 80°. Since the sizes of the electrode sheets and separators wound by different models of cells are different, the sizes and weights of the inserts used are also different. Therefore, the insert angles a corresponding to different models of cells are also different, and the insert angle a needs to be reset for the winding process of different models of cells. Then set the number of turns parameter for the insert mechanism to start inserting as the 5th turn. According to the formula: 5 * 360 + 80°, calculate the starting absolute angle B of the insert as 1880°. Then set the stroke angle C for the insert mechanism to complete the entire insert action as 160°. According to the formula: B + C corresponds to 2220° + 180°, calculate the ending absolute angle D of the insert as 2040°. At the same time, record the total stroke L of the insert mechanism from the initial position to the insert completion position as 190 mm. Based on the above parameters, generate an electronic cam at the PLC end. With the stroke angle C as 160° as the maximum value of the abscissa and the total stroke L as 190 mm as the maximum value of the ordinate, establish a two-dimensional coordinate system, as Figure 4As shown, in the established two-dimensional coordinate system, a motion curve from the origin to the end point of the insert is drawn as the electronic cam motion curve of the insert mechanism. The angle corresponding to the origin in the motion curve is the starting absolute angle B, which is 1880°, and the angle corresponding to the end point is the ending absolute angle D, which is 2040°. When the winding needle rotates to 1880°, the winding needle servo motor is used as the main shaft and the insert servo motor is used as the slave shaft for electronic cam coupling. During the normal cell winding process, when the winding needle rotates to 1880°, the insert mechanism starts to insert the insert under the control of the electronic cam; when the winding needle rotates to 2040°, the insert mechanism completes the insert action, realizing insert without stopping the machine. While inserting the insert, the cell winding continues, enabling the pole piece and the separator to continue winding around the insert and the periphery of the cell to the expected number of turns. Finally, the cell winding is completed, and the insert is withdrawn by the insert mechanism. At the same time, the pole piece and the separator are cut off by the cutting mechanism.

[0051] Example 3: First, set the reference angle to 0° when the insert 2 of the insert mechanism is vertically upward and the winding needle 1 of the winding needle mechanism is vertically upward. Then, control the servo motor of the winding needle mechanism to rotate the winding needle at a preset speed. When the winding needle rotates to 1510°, it is observed that the insert starts to deflect away from the winding needle under the action of its own gravity and centrifugal force. At this time, stop the rotation of the winding needle, and record the current winding needle rotation angle A as 1510°. Take the remainder of 1510° and 360°, and obtain the starting insert angle a as 70°. Since the sizes of the pole pieces and separators wound by different models of cells are different, the sizes and weights of the inserts used are also different. Therefore, the insert angles a corresponding to different models of cells are also different, and the insert angle a needs to be reset for the winding process of different models of cells. Then, set the number of turns parameter for the insert mechanism to start inserting as the 7th turn. According to the formula: 7 * 360 + 70°, calculate the starting absolute angle B of the insert as 2590°. Then, set the stroke angle C for the insert mechanism to complete the entire insert action as 140°. According to the formula: B + C corresponding to 2590° + 140°, calculate the ending absolute angle D of the insert as 2730°. At the same time, record the total stroke L of the insert mechanism from the initial position to the insert completion position as 190 mm. Based on the above parameters, generate an electronic cam at the PLC end. Take the stroke angle C as 140° as the maximum value of the abscissa and the total stroke L as 190 mm as the maximum value of the ordinate to establish a two-dimensional coordinate system, as Figure 5As shown, in the established two-dimensional coordinate system, a motion curve from the origin to the end point of the insert is drawn as the electronic cam motion curve of the insert mechanism. The angle corresponding to the origin in the motion curve is the starting absolute angle B, which is 2590°, and the angle corresponding to the end point is the ending absolute angle D, which is 2730°. When the winding needle rotates to 2590°, the winding needle servo motor is used as the main shaft and the insert servo motor is used as the slave shaft for electronic cam coupling. During the normal cell winding process, when the winding needle rotates to 2590°, the insert mechanism starts to insert the insert under the control of the electronic cam; when the winding needle rotates to 2730°, the insert mechanism completes the insert action, realizing insert without stopping the machine. While inserting the insert, the cell winding continues, enabling the pole piece and the separator to continue winding around the insert and the periphery of the cell to the expected number of turns. Finally, the cell winding is completed, and the insert is withdrawn by the insert mechanism. At the same time, the pole piece and the separator are cut off by the cutting mechanism.

[0052] Example 4: First, set the reference angle to 0° when the insert 2 of the insert mechanism is vertically upward and the winding needle 1 of the winding needle mechanism is vertically upward. Then, control the servo motor of the winding needle mechanism to rotate the winding needle at a preset speed. When the winding needle rotates to 445°, it is observed that the insert starts to shift away from the winding needle under the action of its own gravity and centrifugal force. At this time, stop the rotation of the winding needle, and record the current winding needle rotation angle A as 445°. Take the remainder of 445° and 360°, and obtain the starting insert angle a as 85°. Since the sizes of the pole pieces and separators wound by different models of cells are different, the sizes and weights of the inserts used are also different. Therefore, the insert angles a corresponding to different models of cells are also different, and the insert angle a needs to be reset for the winding process of different models of cells. Then, set the number of turns parameter for the insert mechanism to start inserting as the 5th turn. According to the formula: 5 * 360 + 85°, calculate the starting absolute angle B of the insert as 1885°. Then, set the stroke angle C for the insert mechanism to complete the entire insert action as 120°. According to the formula: B + C corresponding to 1885° + 120°, calculate the ending absolute angle D of the insert as 2005°. At the same time, record the total stroke L of the insert mechanism from the initial position to the insert completion position as 190 mm. Based on the above parameters, generate an electronic cam at the PLC end. Using the stroke angle C of 120° as the maximum value of the abscissa and the total stroke L of 190 mm as the maximum value of the ordinate, establish a two-dimensional coordinate system, as Figure 6As shown in the figure, in the established two-dimensional coordinate system, a motion curve from the origin to the end point of the insert piece is drawn as the electronic cam motion curve of the insert piece mechanism. The angle corresponding to the origin in the motion curve is the starting absolute angle B, which is 1885°, and the angle corresponding to the end point is the ending absolute angle D, which is 2005°. When the winding needle rotates to 1885°, the winding needle servo motor is used as the main axis and the insert piece servo motor is used as the slave axis for electronic cam coupling. During the normal battery core winding process, when the winding needle rotates to 1885°, the insert piece mechanism starts to insert the insert piece under the control of the electronic cam; when the winding needle rotates to 2005°, the insert piece mechanism completes the insert piece action, realizing insert piece without stopping the machine. While inserting the insert piece, the battery core winding continues, enabling the pole piece and the separator to continue winding around the periphery of the insert piece and the battery core to the expected number of turns. Finally, the battery core winding is completed, and the insert piece is withdrawn by the insert piece mechanism. At the same time, the pole piece and the separator are cut off by the cutting mechanism.

[0053] In addition, this embodiment also sets up a battery core winding device, including a winding needle mechanism, an insert piece mechanism, a servo motor, and a PLC controller. The PLC controller is configured to execute the method for realizing insert piece without stopping the machine during the battery core winding process. It also includes a sensor for detecting the rotation angle of the winding needle mechanism. The sensor is connected to the PLC controller and is used to transmit the detected rotation angle information to the PLC controller.

[0054] All the parameters that need to be controlled in the method for realizing insert piece without stopping the machine during the battery core winding process can be recorded and adjusted through the PLC controller, such as setting the adjustment reference angle, recording the adjustment rotation angle A, recording the adjustment starting insert piece angle a, recording the adjustment starting absolute insert piece angle B, recording the adjustment stroke angle C, recording the adjustment ending absolute insert piece angle D, recording the stroke L of the insert piece action, and generating and inputting the electronic cam motion curve.

[0055] The winding needle mechanism is controlled by a winding needle servo motor to rotate the winding needle. The insert piece mechanism includes a driving device and an insert piece. The driving device of the insert piece mechanism is composed of an insert piece servo motor. The driving device is used to drive the insert piece to move horizontally, and the insert piece servo motor cooperates with the electronic cam to realize the insert piece action.

[0056] Automated control is realized by using the PLC controller. Precise control of the insert piece process is achieved through angle parameters and electronic cam technology, improving the quality and efficiency of battery core winding. Insert piece without stopping the machine during the battery core winding process is realized, thus significantly improving the production efficiency of lithium batteries. At the same time, the continuity and stability of battery core winding are ensured, the difficulty and cost of manual operation are reduced, the automation level and production efficiency of the production line are improved, and it has the characteristics of high efficiency, accuracy, and stability. It is suitable for the production and manufacturing of large-scale lithium battery cores and has important application value.

[0057] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as the protection scope of the present invention.

Claims

1. Method for realizing non-stop inserting of inserts during the winding process of an electric core, characterized in that The method includes the following steps: In the first step, set a reference angle. When the winding needle of the winding needle mechanism rotates to a certain angle, it is defined as the reference angle. At this time, the reference angle is set to 0°. In the second step, obtain the starting insertion angle. Control the servo motor of the winding needle mechanism to make the winding needle of the winding needle mechanism rotate in the normal winding direction. At this time, the insertion mechanism is driven by the winding needle mechanism to rotate synchronously until it is observed that the insert of the insertion mechanism deflects away from the winding needle under the action of its own gravity and centrifugal force. Then, control the winding needle mechanism to stop rotating, and obtain the rotation angle A of the winding needle mechanism at this time. The rotation angle A of the winding needle mechanism is calculated starting from the reference angle. After taking the remainder of the rotation angle A and 360°, the starting insertion angle a of the insertion mechanism to start the insertion action is obtained. In the third step, the program sets the number of turns parameter for the insertion mechanism to start the insertion action as the Nth turn, which is the number of turns of the winding needle mechanism. When the winding needle mechanism drives the insertion mechanism to rotate to the Nth turn, the insertion mechanism starts the insertion action, and uses the formula N*360°+a to calculate the absolute starting insertion angle B. In the fourth step, obtain the stroke angle C of the insert of the insertion mechanism during the entire complete insertion action. The stroke angle C refers to the angle that the winding needle mechanism rotates during the period from the start of the insertion action to the completion of the insertion action of the insert, and uses the formula B+C to obtain the absolute ending insertion angle D. In the fifth step, obtain the total stroke L of the insert of the insertion mechanism from the start of the insertion action to the completion of the insertion action. The total stroke L refers to the horizontal movement stroke of the insert during the entire process of the servo motor of the insertion mechanism driving the insert from the initial position to the completion of the insertion action. In the sixth step, generate an electronic cam motion curve at the PLC program setting end according to the stroke angle C set in the fourth step and the parameter of the total stroke L in the fifth step. The electronic cam motion curve is used to control the insert of the insertion mechanism to perform a horizontal insertion action according to the trajectory of the electronic cam through the program. In the seventh step, during the cell winding process, when the rotation angle of the winding needle of the winding needle mechanism reaches the absolute starting insertion angle B, the program controls the insertion mechanism to drive the insert to insert horizontally into the cell being wound by the winding needle according to the electronic cam motion curve generated in the sixth step until the rotation angle of the winding needle of the winding needle mechanism reaches the absolute ending insertion angle D, completing the insertion of the cell without stopping the machine.

2. The method for realizing non-stop inserting of inserts during the winding process of the battery cell according to claim 1, wherein: In the first step, when setting the reference angle, control the winding needle of the winding needle mechanism and the insert of the insertion mechanism to be perpendicular to the horizontal plane.

3. The method for realizing inserting sheets without stopping the machine during the cell winding process according to claim 2, wherein: In the second step, the result of the starting insertion angle a obtained after taking the remainder of the rotation angle A and 360° is less than 90°.

4. The method for realizing non-stop insertion of inserts during the winding process of the battery cell according to any one of claims 1-3, characterized in that: In the fourth step, the stroke angle C is not greater than 180°. Within the stroke angle C, it is necessary to ensure that the insertion of the insert from the start of the insertion action to the completion of the insertion action does not interfere with the normal cell winding action.

5. The method for realizing inserting sheets without stopping the machine during the core winding process according to any one of claims 1-3, characterized in that: In the third step, the parameter N for starting the insertion action is an integer value preset according to the cell specifications and winding requirements.

6. The method for realizing non-stop inserting of sheets during the winding process of the battery cell according to any one of claims 1-3, characterized in that: When the winding needle of the winding needle mechanism reaches the absolute starting angle B, couple the electronic cam relationship with the winding needle servo motor as the main shaft and the insertion servo motor as the slave shaft.

7. The method for realizing non-stop insertion of inserts during the winding process of the battery cell according to any one of claims 1-3, characterized in that: In the sixth step, a two-dimensional coordinate system is established with the stroke angle C as the maximum value of the abscissa and the total stroke L as the maximum value of the ordinate. In the established two-dimensional coordinate system, a motion curve from the origin to the end point of the insert piece is drawn as the electronic cam motion curve of the insert piece mechanism. The angle corresponding to the origin in the motion curve is the starting absolute angle B, and the angle corresponding to the end point is the ending absolute angle D.

8. The battery cell winding device is characterized in that, It includes a needle winding mechanism, an insert piece mechanism, a servo motor, and a PLC controller. The PLC controller is configured to execute the method for inserting the insert piece without stopping during the battery core winding process described in any one of claims 1-7.

9. The cell winding device according to claim 8, wherein: The insert piece mechanism includes a driving device and an insert piece. The driving device is used to drive the insert piece to move in the horizontal direction.

10. The battery cell winding device according to claim 8 or 9, characterized in that, It further includes a sensor for detecting the rotation angle of the needle winding mechanism. The sensor is connected to the PLC controller and is used to transmit the detected rotation angle information to the PLC controller.

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