A belt breaking and pressing method

Abstract

The application relates to a broken belt pressing method, a tension detection mechanism detects the tension of a pole piece; when the tension detection mechanism detects that the tension of the pole piece exceeds a tension fluctuation setting range value, the tension detection mechanism feeds back to a control system, the control system drives a winding brake mechanism and a belt pressing mechanism to start, the belt pressing mechanism presses the pole piece material belt to a roller, and the winding brake mechanism stops winding of a winding roller; when the tension detection mechanism detects that the tension of the pole piece does not exceed the tension fluctuation setting range value, the tension detection mechanism feeds back to the control system, and the control system drives a tension swing lever mechanism to move to adjust the tension of the pole piece. The broken belt pressing device detects the tension fluctuation of the pole piece through the tension detection mechanism, confirms the broken belt basis through the tension fluctuation mode, realizes the belt pressing function through the belt pressing mechanism, avoids waste of the pole piece, and after the belt is broken, the winding brake mechanism can quickly stop the winding shaft, avoids damage of a winding motor due to overloading, and reduces damage of the pole piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery production, and in particular to a belt breaking and pressing method. BACKGROUND

[0002] As a new energy industry emerging energy, lithium batteries have the advantages of high specific energy, long cycle life, low self-discharge rate, no memory effect, and no pollution, and are widely used in various fields such as consumption and power, and are vigorously supported by the state. The pole piece is an important component for lithium batteries to realize energy interaction with the outside world. The processing of the pole piece usually needs three steps of brushing powder, rolling and slitting, and the conveying of the pole piece is realized through a roll-to-roll mechanism cooperating with a guide mechanism, a tension mechanism and the like.

[0003] In the laser cutting process, the tension of the pole piece is prone to fluctuation. When the equipment detects that the tension fluctuation of the pole piece is large, the winding motor stops, the winding brake device will assist braking to avoid damage to the motor due to overload, and at the same time, a belt pressing structure is needed to press the pole piece. However, it takes a certain time for the winding motor to stop, so when the belt pressing structure or the pressure roller structure is pressed down, it is necessary to ensure that the belt does not break and the tension of the pole piece is ensured. However, if the pressure roller rotates too much resistance to press the pole piece, it is easy to break the belt, and if it is too loose, the pressure roller cannot ensure the tension of the pole piece when the equipment is running. SUMMARY

[0004] The main purpose of the present application is to provide a belt breaking and pressing method to solve the above technical problems. The tension fluctuation of the pole piece is detected by the tension detection mechanism, the belt breaking basis is confirmed by the tension fluctuation, and the belt pressing function is realized by the belt pressing mechanism to avoid waste of the pole piece.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A belt breaking and pressing method is applied to a belt breaking and pressing device, the belt breaking and pressing device comprises a control system, a plurality of tension detection mechanisms, a tension swing lever mechanism, a winding brake mechanism and a plurality of belt pressing mechanisms, the plurality of tension detection mechanisms, the winding brake mechanism, the tension swing lever mechanism and the plurality of belt pressing mechanisms are electrically connected with the control system respectively, the winding brake mechanism is installed on a winding roller, and specifically comprises the following steps:

[0007] S1, the tension detection mechanism detects the tension of the pole piece;

[0008] S2, when the tension detection mechanism detects that the tension of the pole piece exceeds the set range value of the tension fluctuation, the tension detection mechanism feeds back to the control system, the control system drives the winding brake mechanism and the belt pressing mechanism to start, the belt pressing mechanism presses the pole piece material belt tightly onto the roller, and the winding brake mechanism stops the winding roller;

[0009] S3, when the tension detection mechanism detects that the tension of the pole piece does not exceed the tension fluctuation set range value, the tension detection mechanism feeds back to the control system, and the control system drives the tension swing lever mechanism to move to adjust the tension of the pole piece.

[0010] As a preferred technical solution, the tension swing lever mechanism comprises a gas tank, a proportional valve, a swing arm cylinder, a swing arm, a swing roller and a swing arm mounting seat, the gas tank is communicated with the swing arm cylinder through the proportional valve, the swing arm is rotatably arranged on the swing arm mounting seat, the swing arm is rotatably arranged on the swing arm mounting seat, the swing roller is mounted on the end of the swing arm, and the output end of the swing arm cylinder is connected with the swing arm.

[0011] As a preferred technical solution, in step S3, the following steps are specifically included:

[0012] S3.1, the control system determines the difference between the tension detection value of the pole piece and the tension set value;

[0013] S3.2, when the detection value F 检 is less than the tension set value F 设 , the swing arm cylinder needs to drive the swing arm to move to the right side, at this time, F 设 >F 偏差 =F 气 =P 进 *(D / 2) 2 , wherein F 偏差 =|F 设 -F 检 |, D is the cylinder diameter of the swing arm cylinder, the swing arm moves to the right side, and the air pressure needs to be increased to F 偏差 is 0.

[0014] S3.3, when the detection value F 检 is equal to the tension set value F 设 , the swing arm cylinder output force F 气 =F 设 , at this time, the swing arm cylinder inlet air pressure P 进 remains unchanged.

[0015] S3.4, when the detection value F 检 is greater than the tension set value F 设 , the swing arm cylinder needs to drive the swing arm to move to the left side, at this time, F 设 <F 偏差 =F 气 =P 进 *(D / 2) 2 , wherein F 偏差 =|F 设 -F 检D is the cylinder diameter of the swing arm cylinder, and the swing arm moves to the left side, and the air pressure needs to be reduced to F 偏差 is 0;

[0016] As a preferred technical solution, it further comprises the step S3.5, when the swing arm reaches the point a or the point b, F 偏差 is still not 0, it proves that the tension setting value F 设 is still not 0, it proves that the tension setting value F 检 is too large, that is, it is judged as a broken belt condition.

[0017] As a preferred technical solution, the above F 偏差 satisfies the following relationship:

[0018] e(t)=F 偏差 *K

[0019] u(t)=Kp*e(t)+Ki*∫e(t)dt+Kd*de(t) / dt

[0020] Wherein, u(t) is the output value of the controller, e(t) is the error of the setting value and the actual output value, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, and K is the conversion coefficient.

[0021] As a preferred technical solution, the air pressure P 进 of the swing arm cylinder satisfies the following relationship:

[0022] P 进 =W 幅 *F 设 *L 支 / L 连 / Ae

[0023] P 进 >0.2Mpa

[0024] Wherein, F 设 is the tension of the coated substrate material, L 支 is the distance from the axis of the swing arm shaft to the axis of the swing roller, L 连 is the distance from the axis of the swing arm shaft to the swing arm cylinder connector, W 幅 is the width of the pole piece, Ae is the effective pressure area of the swing arm cylinder, P 进 is the air pressure of the swing arm cylinder, F 气 is the output force of the swing arm cylinder, F 检 is the tension detected by the tension detection mechanism.

[0025] As a preferred technical scheme, the pressing belt mechanism comprises a pressing belt support seat, a gas cylinder, a pressing roller, a connecting structure and a pressing roller mounting seat, the gas cylinder is installed on the pressing belt support seat, the pressing roller is installed on the pressing roller mounting seat through the connecting structure, the connecting structure is installed on both ends of the pressing roller, and the gas cylinder drives the pressing roller mounting seat to move.

[0026] As a preferred technical scheme, the connecting structure comprises a locking ring, a fixing screw, a rubber sleeve and an adjusting screw, the rubber sleeve is sleeved on the end of the pressing roller, the locking ring is covered on the outer surface of the rubber sleeve, the locking ring is fixed on the pressing roller mounting seat through the fixing screw, two adjusting clamping blocks are arranged on the locking ring, the two adjusting clamping blocks are oppositely arranged, and the adjusting screw is threadedly connected with the two adjusting clamping blocks respectively.

[0027] As a preferred technical scheme, the winding brake mechanism comprises a brake fixing seat, a brake structure and a brake disc, the brake disc is fixedly arranged on the end of the winding roller, the brake structure is installed on the brake fixing seat, and the brake disc passes through the brake structure.

[0028] The beneficial effects of the present application are that the above-mentioned broken belt pressing belt device detects the tension fluctuation of the pole piece through the tension detection mechanism, confirms the broken belt basis through the tension fluctuation mode, realizes the pressing belt function through the pressing belt mechanism, avoids the waste of the pole piece, after the broken belt occurs, the winding brake mechanism can quickly brake the winding shaft, avoids the damage of the winding motor overload and reduces the damage of the pole piece. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure schematic view of the broken belt pressing belt device related to the present application.

[0030] Figure 2 It is a structure schematic view of the tension swing lever mechanism related to the present application.

[0031] Figure 3 It is an installation schematic view of the swing arm gas cylinder related to the present application.

[0032] Figure 4 It is a structure schematic view of the pressing belt mechanism related to the present application Figure 1 ;

[0033] Figure 5 It is a structure schematic view of the pressing belt mechanism related to the present application Figure 2 ;

[0034] Figure 6 It is an installation schematic view of the winding brake mechanism related to the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0036] As shown in Figure 1 , a broken belt pressing device is applied to a slitting machine, and the broken belt pressing device comprises a control system, a first tension detection mechanism 1, a second tension detection mechanism 2, a third tension detection mechanism 3, a fourth tension detection mechanism 4, a tension swing lever mechanism 5, a winding brake mechanism 13, a first pressing belt mechanism 6, a second pressing belt mechanism 7, a third pressing belt mechanism 8, a fourth pressing belt mechanism 9, a fifth pressing belt mechanism 10, a sixth pressing belt mechanism 11 and a seventh pressing belt mechanism 12. The first tension detection mechanism 1, the second tension detection mechanism 2, the third tension detection mechanism 3, the fourth tension detection mechanism 4, the tension swing lever mechanism 5, the winding brake mechanism 13, the first pressing belt mechanism 6, the second pressing belt mechanism 7, the third pressing belt mechanism 8, the fourth pressing belt mechanism 9, the fifth pressing belt mechanism 10, the sixth pressing belt mechanism 11 and the seventh pressing belt mechanism 12 are respectively electrically connected with the control system. The winding brake mechanism 13 is installed on a winding roller a. The first tension detection mechanism 1 detects the tension of the unwound pole piece. The second tension detection mechanism 2 detects the tension of the slitted pole piece. The third tension detection mechanism 3 detects the tension of the upper path of the slitted pole piece. The fourth tension detection mechanism 4 detects the tension of the lower path of the slitted pole piece. The tension swing lever mechanism 5 is used for adjusting the tension of the pole piece. The first pressing belt mechanism 6 is used for ensuring the stability of the unwound pole piece. The second pressing belt mechanism 7 is used for ensuring the stability of the pole piece before laser deviation. The third pressing belt mechanism 8 is used for ensuring the stability of the pole piece of the upper path after slitting. The fourth pressing belt mechanism 9 is used for ensuring the stability of the pole piece of the upper path after slitting. The fifth pressing belt mechanism 10 is used for ensuring the stability of the pole piece wound on the upper path. The sixth pressing belt mechanism 11 is used for ensuring the stability of the pole piece of the lower path after slitting. The seventh pressing belt mechanism 12 is used for ensuring the stability of the pole piece wound on the lower path.

[0037] As shown in Figure 2 and Figure 3 , the tension swing lever mechanism 5 comprises an air tank 51, a proportional valve 52, a swing arm cylinder 53, a swing arm 55, a swing roller 56 and a swing arm mounting seat 54. The air tank 51 is communicated with the swing arm cylinder 53 through the proportional valve 52. The swing arm 55 is rotatably arranged on the swing arm mounting seat 54. The swing roller 56 is installed at the end of the swing arm 55. The output end of the swing arm cylinder 53 is connected with the swing arm 55. The swing arm cylinder 53 drives the swing arm 55 to rotate relative to the swing arm mounting seat 54, thereby driving the swing roller 45 to rotate, so as to adjust the tension of the pole piece.

[0038] As shown in Figure 4 and Figure 5 , the tension swing lever mechanism 5 comprises an air tank 51, a proportional valve 52, a swing arm cylinder 53, a swing arm 55, a swing roller 56 and a swing arm mounting seat 54. The air tank 51 is communicated with the swing arm cylinder 53 through the proportional valve 52. The swing arm 55 is rotatably arranged on the swing arm mounting seat 54. The swing roller 56 is installed at the end of the swing arm 55. The output end of the swing arm cylinder 53 is connected with the swing arm 55. The swing arm cylinder 53 drives the swing arm 55 to rotate relative to the swing arm mounting seat 54, thereby driving the swing roller 45 to rotate, so as to adjust the tension of the pole piece.As shown, the pressing belt mechanism 6 comprises a pressing belt support seat 61, a cylinder 62, a pressing roller 64, a connecting structure 65 and a pressing roller mounting seat 63. The cylinder 62 is mounted on the pressing belt support seat 61, the pressing roller 64 is mounted on the pressing roller mounting seat 63 through the connecting structure 65, the connecting structure 65 is mounted on both ends of the pressing roller 64, and the cylinder 62 drives the pressing roller mounting seat 63 to move. The connecting structure 65 comprises a locking ring 651, a fixing screw 653, a rubber sleeve 652 and an adjusting screw 654. The rubber sleeve 652 is sleeved on the end of the fixed shaft of the pressing roller 64, the locking ring 651 is wrapped on the outer surface of the rubber sleeve 652, the locking ring 651 is fixedly arranged on the pressing roller mounting seat 63 through the fixing screw 653, two adjusting clamping blocks 655 are arranged on the locking ring 651, the two adjusting clamping blocks 655 are oppositely arranged, and the adjusting screw 654 is threadedly connected with the two adjusting clamping blocks 655 respectively, so as to clamp the fixed shaft of the pressing roller 64 to fix the pressing roller 64. When the pressing belt operation is needed, the cylinder 62 drives the pressing roller mounting seat 63 to make the pressing roller 64 press the pole piece on the over roller b tightly.

[0039] As shown, Figure 6 The winding brake mechanism 13 comprises a brake fixing seat 131, a brake structure 132 and a brake disc 133. The brake disc 133 is fixedly arranged on the end of the winding roller a, the brake structure 132 is mounted on the brake fixing seat 131, and the brake disc 133 passes through the brake structure 132. The end of the winding roller a is provided with a magnetic powder clutch a1, and the motor is connected with the winding roller a through the magnetic powder clutch a1. When the brake is needed, the magnetic powder clutch a1 is disconnected, the motor is disconnected with the winding roller a, the brake structure 132 brakes the brake disc 133, and the winding roller a stops rotating.

[0040] A broken belt pressing belt method is applied to the broken belt pressing belt device, and specifically comprises the following steps:

[0041] S1, the first tension detection mechanism 1, the second tension detection mechanism 2, the third tension detection mechanism 3 and the fourth tension detection mechanism 4 detect the tension of the pole piece respectively;

[0042] S2, when one of the tension detection mechanisms detects that the tension of the pole piece exceeds the tension fluctuation setting range value, the tension detection mechanism feeds back to the control system, the control system drives the winding brake mechanism 13, the first pressing belt mechanism 6, the second pressing belt mechanism 7, the third pressing belt mechanism 8, the fourth pressing belt mechanism 9, the fifth pressing belt mechanism 10, the sixth pressing belt mechanism 11 and the seventh pressing belt mechanism 12 to start, the cylinder 62 drives the pressing roller mounting seat 63 to make the pressing roller 64 press the pole piece on the over roller b tightly, at the same time, the magnetic powder clutch a1 is disconnected, the motor is disconnected with the winding roller a, the brake structure 132 brakes the brake disc 133, and the winding roller a stops rotating to stop winding the pole piece;

[0043] S3. When all tension detection mechanisms detect that the tension variation of the electrode sheet does not exceed the tension fluctuation set range, and the first tension detection mechanism 1 detects a change in the tension of the electrode sheet after unwinding, the first tension detection mechanism 1 feeds back to the control system. The control system then drives the tension swing arm mechanism 5 to adjust the tension of the electrode sheet. Specifically, this includes the following steps:

[0044] S3.1 The control system determines the difference between the detected tension value and the set tension value of the electrode sheet;

[0045] S3.2, When the detection value F 检 Less than the tension set value F 设 The swing arm cylinder needs to drive the swing arm to move to the right. At this time, F 设 >F 偏差 =F 气 =P 进 *(D / 2) 2 Among them, F 偏差 =|F 设 -F 检 |, D is the cylinder diameter of the rocker arm cylinder. When the rocker arm moves to the right, the air pressure needs to be increased to F. 偏差 The value is 0. Note: The swing roller 56 did not reach point a or point b.

[0046] S3.3, when the detection value F 检 Equal to the tension setpoint F 设 The output force F of the swing arm cylinder 气 =F 设 At this time, the air pressure P at the intake end of the swing arm cylinder 进 Remain unchanged;

[0047] S3.4, When the detection value F 检 Greater than the tension set value F 设 The swing arm cylinder needs to drive the swing arm to move to the left. At this time, F 设 <F 偏差 =F 气 =P 进 *(D / 2) 2 Among them, F 偏差 =|F 设 -F 检 |, D is the cylinder diameter of the rocker arm cylinder. When the rocker arm moves to the left, the air pressure needs to be reduced to F. 偏差 The value is 0. Note: The swing roller 56 did not reach point a or point b.

[0048] S3.5 When the swing roller 56 reaches point a or point b, F 偏差 If it is still not 0, then it proves that the tension setpoint F 设 With the detection value F 检 If the deviation is too large, it is judged as a broken belt.

[0049] The above F 偏差 satisfies the following relationship:

[0050] e(t) = F 偏差 *K

[0051] u(t) = Kp*e(t) + Ki*∫e(t)dt + Kd*de(t) / dt

[0052] wherein u(t) is the output value of the controller, e(t) is the error between the set value and the actual output value, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, and K is the conversion coefficient.

[0053] The air pressure P 进 satisfies the following relationship:

[0054] P 进 = W 幅 *F 设 *L 支 / L 连 / Ae

[0055] wherein F 设 is the tension of the coated base material, L 支 is the distance from the axis of the swing arm 55 pivot to the axis of the swing roller 56, L 连 is the distance from the axis of the swing arm 55 pivot to the swing arm cylinder 53 connecting head, W 幅 is the width of the pole piece, Ae is the effective pressure receiving area of the swing arm cylinder 53, P 进 is the air pressure at the intake end of the swing arm cylinder 53, F 气 is the output force of the swing arm cylinder 53, F 检 is the tension detected by the first tension detection mechanism 1. In order to ensure that the proportional valve 52 operates normally, P 进 > 0.2 MPa.

[0056] The above-described embodiments are merely preferred examples of the present application and are not intended to limit the scope of the present application, and equivalent changes or modifications made to the structure, features, and principles described in the scope of the present application should be included in the scope of the present application.

Claims

1. A belt breaking and pressing method applied to a belt breaking and pressing device, characterized by, The belt breaking and pressing device comprises a control system, a plurality of tension detection mechanisms, a tension swing lever mechanism, a winding brake mechanism and a plurality of pressing mechanisms, the plurality of tension detection mechanisms, the winding brake mechanism, the tension swing lever mechanism and the plurality of pressing mechanisms are electrically connected with the control system respectively, the winding brake mechanism is installed on a winding roller, and specifically comprises the following steps: S1, the tension detection mechanism detects the tension of the pole piece; S2, when the tension detection mechanism detects that the tension of the pole piece exceeds the tension fluctuation setting range value, the tension detection mechanism feeds back to the control system, the control system drives the winding brake mechanism and the pressing mechanism to start, the pressing mechanism presses the pole piece material belt to the over roller, and the winding brake mechanism stops winding the winding roller; S3, when the tension detection mechanism detects that the tension of the pole piece does not exceed the tension fluctuation setting range value, the tension detection mechanism feeds back to the control system, and the control system drives the tension swing lever mechanism to move to adjust the tension of the pole piece; The tension swing lever mechanism comprises a gas tank, a proportional valve, a swing arm cylinder, a swing arm, a swing roller and a swing arm mounting seat, the gas tank is communicated with the swing arm cylinder through the proportional valve, the swing arm is rotatably arranged on the swing arm mounting seat, the swing roller is installed at the end of the swing arm, and the output end of the swing arm cylinder is connected with the swing arm. In step S3, specifically comprising the following steps: S3.1, the control system determines the difference between the tension detection value of the pole piece and the tension setting value; S3.2, when the detected value F 检 is less than the tension setting value F 设 , the swing arm cylinder needs to drive the swing arm to move to the right side, at this time, F 设 > F 偏差 =F 气 =P 进 *(D / 2)², wherein F 偏差 =|F 设 -F 检 |, D is the cylinder diameter of the swing arm cylinder, P 进 is the air pressure at the intake end of the swing arm cylinder, the swing arm moves to the right side, and the air pressure needs to be increased to F 偏差 is 0; S3.3, when the detected value F 检 is equal to the tension set value F 设 , the swing arm cylinder output force F 气 = F 设 , at this time the swing arm cylinder intake end gas pressure P 进 remains unchanged; S3.4, when the detected value F 检 greater than the tension setting value F 设 , the swing arm cylinder needs to drive the swing arm to move to the left side, at this time, F 设 <F 偏差 =F 气 =P 进 *(D / 2)², wherein F 偏差 =|F 设 -F 检 |, D is the cylinder diameter of the swing arm cylinder, and the swing arm moves to the left side, and the air pressure needs to be reduced to F 偏差 0.

2. The strip breaking and pressing method according to claim 1, characterized by, It also includes a step S3.5, when the swing roller reaches a point a or b, F 偏差 Still not 0, then the tension set value F 设 With the detection value F 检 Deviation is too large, that is, the judgment for the broken tape case.

3. The strip breaking and pressing method according to claim 2, characterized by, The above F 偏差 satisfies the following relationship: Wherein, u(t) is the output value of the controller, e(t) is the error between the setting value and the actual output value, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, and K is the conversion coefficient.

4. The belt breaking and pressing method according to claim 3, characterized by, The intake air pressure P of the swing arm cylinder 进 satisfies the following relationship: P 进 =W 幅 *F 设 *L 支 / L 连 / Ae P 进 > 0.2 MPa Wherein, F 设 L is the tension of the coating substrate material 支 L is the distance from the axis of the swing arm pivot to the axis of the swing roll 连 W is the distance from the axis of the swing arm pivot to the swing arm cylinder connection head 幅 W is the width of the pole piece, Ae is the effective pressure receiving area of the swing arm cylinder, P 进 P is the air pressure at the intake end of the swing arm cylinder 5. The strip breaking and pressing method according to claim 4, characterized by The pressing mechanism comprises a pressing support seat, a cylinder, a pressing roller, a connecting structure and a pressing roller mounting seat, the cylinder is installed on the pressing support seat, the pressing roller is installed on the pressing roller mounting seat through the connecting structure, the connecting structure is installed at both ends of the pressing roller, and the cylinder drives the pressing roller mounting seat to move.

6. The strip breaking and pressing method according to claim 5, characterized by The connecting structure comprises a locking ring, a fixing screw, a rubber sleeve and an adjusting screw, the rubber sleeve is sleeved on the end of the pressing roller, the locking ring is covered on the outer surface of the rubber sleeve, the locking ring is fixedly arranged on the pressing roller mounting seat through the fixing screw, two adjusting clamps are arranged on the locking ring, the two adjusting clamps are oppositely arranged, and the adjusting screw is threadedly connected with the two adjusting clamps respectively.

7. The strip breaking and pressing method according to claim 4, wherein The winding brake mechanism comprises a brake fixing seat, a brake structure and a brake disc, the brake disc is fixedly arranged at the end of the winding roller, the brake structure is installed on the brake fixing seat, and the brake disc passes through the brake structure.

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