Swing type film laminating mechanism and lamination stacking machine

Abstract

The utility model discloses a swing type film laminating mechanism and a laminating machine, the swing type film laminating mechanism comprises a base plate, a first driving part, a swing part, a first roller set and a second roller set, the first end of the swing part is rotatably mounted on the base plate, the first roller set is mounted at the first end of the swing part and extends in the first direction, and the second roller set is mounted at the second end of the swing part and extends in the second direction; the second roller set is installed at the second end of the swing part and extends in the first direction, and a diaphragm sent out by the diaphragm feeding mechanism sequentially penetrates through the first roller set and the second roller set and then is conveyed to the lamination table. The first driving part is configured to drive the first end of the swing part to rotate, so that the diaphragm swings in a reciprocating mode with the first roller set as the swing center, and then the diaphragm is stacked on the lamination table in a left-right reciprocating mode. According to the laminating mechanism, in the process of laminating the diaphragms, the length of the section of the diaphragm from the discharging end of the diaphragm feeding mechanism to the lamination table is basically unchanged, so that the tension change of the diaphragms in the lamination process is very small, and the levelness of laminated battery cells is greatly improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing equipment technology, and in particular to a swing-type coating mechanism and a stacking machine. Background Technology

[0002] In the lithium battery manufacturing process, the cell preparation method mainly adopts the "Z"-shaped stacking scheme. The separator needs to be transferred to the coating mechanism through the separator feeding mechanism, and then accurately guided to the stacking platform by the coating mechanism to complete the stacking of the separator. The stacked separator forms a "Z"-shaped fold on the stacking platform, and together with the action of the stacking table and the battery electrode, the positive electrode cell and the negative electrode cell are alternately stacked between the two layers of separator to form the battery stack.

[0003] Currently, the diaphragm is typically stacked on the stacking platform by a laminating mechanism that moves horizontally back and forth above it, while the stacking platform and the diaphragm feeding mechanism remain stationary. When the laminating mechanism is in the middle of the stacking platform, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is the shortest. When the laminating mechanism is on the outermost left or right end of the stacking platform, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is the longest. Therefore, during the stacking process, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is constantly changing. This can easily lead to continuous changes in the tension of the diaphragm during the stacking process, causing the diaphragm to shift along the length of the rollers in the laminating mechanism. This results in a problem of poor diaphragm flatness in the final stacked cells. Utility Model Content

[0004] The purpose of this application is to provide a swing-type coating mechanism to solve the problem of diaphragm displacement caused by the continuous change of diaphragm tension during the stacking process in existing coating mechanisms; another purpose of this application is to provide a stacking machine including the above-mentioned swing-type coating mechanism.

[0005] To achieve this objective, the following technical solution is adopted in this application:

[0006] In a first aspect, this application proposes a swing-type coating mechanism for stacking separators on a stacking table, comprising a substrate, a first driving member, a swinging member, a first roller group, and a second roller group, wherein:

[0007] The first end of the swing member along its own height direction is rotatably mounted on the substrate. The first roller group is mounted on the first end of the swing member and extends along the first direction. The second roller group is mounted on the second end of the swing member along its own height direction and extends along the first direction. The diaphragm fed by the diaphragm feeding mechanism passes through the first roller group and the second roller group in sequence and is then transported to the stacking table. Both the first roller group and the second roller group are configured to define the movement path of the diaphragm.

[0008] The driving end of the first driving member is connected to the first end of the swing member. The first driving member is configured to drive the first end of the swing member to rotate so that the diaphragm swings back and forth around the first roller group as the swing center, thereby stacking the diaphragm left and right on the stacking table.

[0009] The oscillating coating mechanism proposed in this application, through the cooperation of a first driving component, an oscillating component, a first roller group, and a second roller group, enables the diaphragm to be stacked on the stacking table by oscillation. At the same time, during the stacking process, the diaphragm always oscillates back and forth around the first roller group as the oscillation center, so that the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking table remains basically unchanged, ensuring that the tension change of the diaphragm during the stacking process is very small, which greatly improves the flatness of the cells after stacking. Moreover, the oscillating film discharge method is faster than the horizontal movement film discharge method, which improves the stacking efficiency.

[0010] Optionally, the first roller group includes a first guide roller and a second guide roller that are spaced apart and parallel to each other. Both the first guide roller and the second guide roller can rotate along their own axes. The diaphragm fits through the gap between the first guide roller and the second guide roller, and the swing center of the diaphragm is located between the first guide roller and the second guide roller.

[0011] By setting up a first guide roller and a second guide roller, and fitting the diaphragm through the gap between the first guide roller and the second guide roller, the oscillation center of the diaphragm is always located between the first guide roller and the second guide roller, minimizing the change in the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking table, and further reducing the change in the tension of the diaphragm during the stacking process.

[0012] Optionally, a second driving member is provided on the swing member, and a second roller group is mounted on the swing member in a reciprocating sliding manner along the height direction of the swing member. The driving end of the second driving member is connected to the second roller group, and the second driving member is configured to drive the second roller group to reciprocate sliding along the height direction of the swing member.

[0013] When the oscillating member swings to the maximum stroke on the first side of the oscillating center or to the maximum stroke on the second side of the oscillating center, the second drive member drives the second roller group to extend out of the oscillating member to approach the upper surface of the stacked cells on the stacking table.

[0014] When the swinging component swings to the maximum stroke on the first side of the swing center or to the maximum stroke on the second side of the swing center, it is necessary to place the new electrode sheet onto the separator through the conveying mechanism. At this time, the separator is tilted upward. Through the cooperation of the second drive component and the second roller group, the second roller group is pushed out of the swinging component, which drives the separator to fit as close as possible to the stacked cells, thereby reducing the gap between the separator output by the second roller group and the stacked cells. This makes it easier for the pressing mechanism to press the separator onto the cells, which is convenient for placing the new electrode sheet.

[0015] Optionally, the second roller group includes a third and a fourth guide roller that are spaced apart and parallel to each other. Both the third and fourth guide rollers can rotate along their own axes, and the diaphragm fits through the gap between the third and fourth guide rollers.

[0016] By setting up a third and a fourth guide roller, the diaphragm is constrained during stacking, providing a simple and low-cost second roller assembly.

[0017] Optionally, the oscillating coating mechanism further includes a base and a third drive member. The substrate is mounted on the base in a reciprocating manner along a first direction. The fixed end of the third drive member is mounted on the base, and the driving end of the third drive member is connected to the substrate. The third drive member is configured to drive the substrate to reciprocate along the first direction to adjust the position of the diaphragm in the first direction.

[0018] By cooperating with the third driving component and the substrate, the driving substrate is moved back and forth along the first direction, thereby adjusting the position of the diaphragm in the first direction to perform online correction of the diaphragm.

[0019] Optionally, the oscillating coating mechanism also includes a diaphragm cutting assembly disposed on the outside of the substrate and configured to cut the diaphragm within the oscillating member from the diaphragm of the cell on the stacking stage.

[0020] By setting up a diaphragm cutting component, the diaphragm inside the swing component and the diaphragm of the battery cell on the stacking table are automatically cut apart before the next battery cell is stacked. At the same time, the diaphragm cutting component is independently set on the outside of the substrate to adapt to the coating mechanism to perform swing-type coating, which is a reasonable layout.

[0021] Optionally, the diaphragm cutting assembly includes a fourth drive member and a cutting member, wherein:

[0022] The cutting element extends along a first direction, and the driving end of the fourth driving element is connected to the cutting element. The fourth driving element is configured to drive the cutting element to descend to approach and cut the diaphragm.

[0023] A diaphragm cutting assembly with a simple structure and stable and reliable operation is provided by driving the cutting component to descend and cut the diaphragm via a fourth driving component.

[0024] Optionally, the oscillating coating mechanism also includes a tension blocking assembly mounted on the substrate. The tension blocking assembly is located on the movement path of the diaphragm from the diaphragm feeding mechanism to the first roller group. The tension blocking assembly is configured to adsorb the diaphragm delivered by the diaphragm feeding mechanism and deliver the adsorbed diaphragm to the first roller group to prevent the tension on the diaphragm delivered by the diaphragm feeding mechanism from being transmitted to the diaphragm at the first roller group.

[0025] By setting a tension-breaking component on the moving path of the diaphragm from the diaphragm feeding mechanism to the first roller group, the tension on the diaphragm fed by the diaphragm feeding mechanism is prevented from being transmitted to the first roller group during the diaphragm stacking process, thus ensuring that the tension of the diaphragm is constant during the stacking process; at the same time, the diaphragm tension is broken by adsorbing and contacting the diaphragm on one side, thus achieving the diaphragm tension breaking while avoiding damage to the diaphragm.

[0026] Secondly, this application also proposes a stacking machine, which includes a diaphragm feeding mechanism, the aforementioned oscillating coating mechanism, an electrode feeding mechanism, and a stacking table, wherein:

[0027] The diaphragm feeding mechanism is configured to supply diaphragms to the oscillating coating mechanism;

[0028] The oscillating laminating mechanism is configured to receive diaphragms supplied by the diaphragm feeding mechanism and stack the received diaphragms on the stacking table according to the stacking rules.

[0029] The electrode feeding mechanism is configured to alternately feed positive and negative electrode sheets to the stacking table;

[0030] The stacking stage is configured to work in conjunction with the electrode feeding mechanism and the oscillating coating mechanism to alternately stack the sequentially received positive and negative electrode sheets between two adjacent layers of separators to form a battery cell.

[0031] Through the coordination of the diaphragm feeding mechanism, the oscillating coating mechanism, the electrode feeding mechanism, and the stacking table, the automatic stacking of positive electrode sheets, negative electrode sheets, and diaphragms is achieved to form a battery cell. At the same time, the oscillating coating mechanism uses an oscillating method to stack the diaphragm on the stacking table. During the stacking process, the diaphragm always oscillates back and forth around the first roller group as the oscillation center, so that the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking table remains basically unchanged, ensuring that the tension change of the diaphragm during the stacking process is very small, which greatly improves the flatness of the battery cell after stacking.

[0032] Optionally, the stacking machine also includes two pairs of pressing mechanisms. The two pairs of pressing mechanisms are arranged at both ends of the stacking table along the direction of diaphragm laying. The two pressing mechanisms of each pair of pressing mechanisms are arranged opposite each other on both sides of the stacking table. The two pairs of pressing mechanisms are used to press the laid positive or negative electrode sheets in turn. The pressing action of the pressing mechanism and the reciprocating swing of the oscillating coating mechanism are coordinated to achieve the folding of the diaphragm.

[0033] By having two pairs of pressing mechanisms alternately press down on the laid positive or negative electrode sheets, the cell structure formed by stacking can be ensured to be compact. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the swing-type coating mechanism provided in the embodiments of this application;

[0035] Figure 2This is a front view schematic diagram of the swing-type coating mechanism provided in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the swing path of the swing-type coating mechanism provided in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the installation of the diaphragm cutting assembly of the swing-type film covering mechanism provided in the embodiments of this application;

[0038] Figure 5 This is a schematic diagram of the stacking machine provided in the embodiments of this application;

[0039] Figure 6 This is a three-dimensional schematic diagram of the stacking stage of the stacking machine provided in the embodiments of this application.

[0040] Figures 1 to 6 The following reference numerals are included:

[0041] Oscillating film coating mechanism 10: substrate 11, base 110, third drive member 111, first drive member 12, rotary motor 120, rotating shaft 121, oscillating member 13, first roller group 14, first guide roller 140, second guide roller 141, second roller group 15, third guide roller 150, fourth guide roller 151, second drive member 16, electric cylinder 160, lifting plate 161, diaphragm cutting assembly 17, fourth drive member 170, cutting member 171, tension separation assembly 18, conveying drive member 180, conveying member 181;

[0042] Stacking table 20; pressing mechanism 21;

[0043] Diaphragm 30;

[0044] Diaphragm feeding mechanism 40;

[0045] Positive electrode feeding mechanism 50: positive electrode feeding assembly 51, positive electrode alignment assembly 52, positive electrode conveying assembly 53;

[0046] Anode sheet feeding mechanism 60: Anode sheet feeding assembly 61, Anode sheet alignment assembly 62, Anode sheet handling assembly 63. Detailed Implementation

[0047] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] In the lithium battery manufacturing process, the cell preparation method mainly adopts the "Z"-shaped stacking scheme. The separator needs to be transferred to the coating mechanism through the separator feeding mechanism, and then accurately guided to the stacking platform by the coating mechanism to complete the stacking of the separator. The stacked separator forms a "Z"-shaped fold on the stacking platform, and together with the action of the stacking table and the battery electrode, the positive electrode cell and the negative electrode cell are alternately stacked between the two layers of separator to form the battery stack.

[0049] Currently, the diaphragm is typically stacked on the stacking platform by a laminating mechanism that moves horizontally back and forth above it, while the stacking platform and the diaphragm feeding mechanism remain stationary. When the laminating mechanism is in the middle of the stacking platform, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is the shortest. When the laminating mechanism is on the outermost left or right end of the stacking platform, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is the longest. Therefore, during the stacking process, the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking platform is constantly changing. This can easily lead to continuous changes in the tension of the diaphragm during the stacking process, causing the diaphragm to shift along the length of the rollers in the laminating mechanism. This results in a problem of poor diaphragm flatness in the final stacked cells.

[0050] Therefore, in a first aspect, this application provides a swing-type coating mechanism, see [link to relevant documentation]. Figure 1 , Figure 4 and Figure 5 As shown, the swing-type coating mechanism 10 provided in this application embodiment is used to stack separators 30 on a stacking table 20. It includes a substrate 11, a first driving member 12, a swing member 13, a first roller group 14, and a second roller group 15. The first end of the swing member 13 along its height direction is rotatably mounted on the substrate 11. The first roller group 14 is mounted on the first end of the swing member 13 and along a first direction (…). Figure 1 Extending in the X direction, the second roller group 15 is installed at the second end of the swing member 13 along its own height direction and extends in the first direction. The diaphragm 30 fed by the diaphragm feeding mechanism 40 passes through the first roller group 14 and the second roller group 15 in sequence and is then transported to the stacking table 20. The first roller group 14 and the second roller group 15 are both configured to limit the movement path of the diaphragm 30. The driving end of the first driving member 12 is connected to the first end of the swing member 13. The first driving member 12 is configured to drive the first end of the swing member 13 to rotate so that the diaphragm 30 swings back and forth with the first roller group 14 as the swing center, thereby stacking the diaphragm 30 back and forth on the stacking table 20.

[0051] Specifically, the first driving component 12 includes a rotary motor 120 and a rotary shaft 121. The rotary motor 120 is fixedly mounted on the base plate 11, and the rotary shaft 121 is fixed to the first end of the swing component 13 and rotatably mounted on the base plate 11. The rotating shaft of the rotary motor 120 is connected to the rotary shaft 121. After the rotary motor 120 drives the rotation, the rotary shaft 121 rotates, thereby driving the first end of the swing component 13 to rotate.

[0052] As can be seen, the swing-type coating mechanism 10 proposed in this application, through the cooperation of the first driving member 12, the swing member 13, the first roller group 14 and the second roller group 15, realizes the stacking of the diaphragm 30 on the stacking table 20 by swinging. At the same time, during the stacking process, the diaphragm 30 always swings back and forth around the first roller group 14 as the swing center, so that the length of the diaphragm 30 from the discharge end of the diaphragm feeding mechanism 40 to the stacking table 20 remains basically unchanged, ensuring that the tension change of the diaphragm 30 during the stacking process is very small, which greatly improves the flatness of the cells after stacking. Moreover, the swing-type film discharge method is faster than the horizontal movement film discharge method, which improves the stacking efficiency.

[0053] Please see Figures 3 to 5 As shown, in one embodiment, the first roller group 14 includes a first guide roller 140 and a second guide roller 141 that are spaced apart and parallel to each other. Both the first guide roller 140 and the second guide roller 141 can rotate along their own axes. The diaphragm 30 fits through the gap between the first guide roller 140 and the second guide roller 141, and the swing center of the diaphragm 30 is located between the first guide roller 140 and the second guide roller 141.

[0054] It can be seen that by setting the first guide roller 140 and the second guide roller 141, and by fitting the diaphragm 30 through the gap between the first guide roller 140 and the second guide roller 141, the swing center of the diaphragm 30 is always located between the first guide roller 140 and the second guide roller 141, thereby minimizing the change in the length of the diaphragm 30 from the discharge end of the diaphragm feeding mechanism 40 to the stacking table 20, and further reducing the change in tension of the diaphragm 30 during the stacking process.

[0055] Please see Figure 1 , Figure 3 and Figure 4 As shown, in one embodiment, a second drive member 16 is provided on the swing member 13, and a second roller group 15 is reciprocally slidably mounted on the swing member 13 along the height direction of the swing member 13. The drive end of the second drive member 16 is connected to the second roller group 15, and the second drive member 16 is configured to drive the second roller group 15 to reciprocate along the height direction of the swing member 13. When the swing member 13 swings to the first side of the swing center at its maximum stroke or swings to the second side of the swing center at its maximum stroke, the second drive member 16 drives the second roller group 15 to extend out of the swing member 13 to approach the upper surface of the stacked cells on the stacking table 20.

[0056] Specifically, the second driving component 16 includes an electric cylinder 160 and a lifting plate 161. The lifting plate 161 is mounted on the swing member 13 and can be slidably reciprocated along the height direction of the swing member 13. The second roller group 15 is mounted on the lifting plate 161. The driving end of the electric cylinder 160 is connected to the lifting plate 161. The electric cylinder 160 drives the lifting plate 161 to slide relative to the swing member 13, thereby driving the second roller group 15 to extend out of the swing member 13 to approach the upper surface of the stacked cells on the stacking table 20.

[0057] Specifically, in order to ensure the smooth sliding of the lifting plate 161 relative to the swing member 13, a sliding guide pair consisting of a slider and a linear guide is provided between the lifting plate 161 and the swing member 13.

[0058] As can be seen, when the swing member 13 swings to the maximum stroke on the first side of the swing center or to the maximum stroke on the second side of the swing center, it is necessary to place the new electrode on the separator 30 through the conveying mechanism. At this time, the separator 30 is tilted upward. Through the cooperation of the second drive member 16 and the second roller group 15, the second roller group 15 is pushed out of the swing member 13, which drives the separator 30 to fit as close as possible to the stacked cells, thereby reducing the gap between the separator 30 output by the second roller group 15 and the stacked cells. This makes it easier for the pressing mechanism to press the separator 30 onto the cells, and facilitates the placement of the new electrode on the separator 30.

[0059] In one embodiment, the second roller group 15 includes a third guide roller 150 and a fourth guide roller 151 that are spaced apart and parallel to each other. Both the third guide roller 150 and the fourth guide roller 151 can rotate along their own axes, and the diaphragm 30 fits through the gap between the third guide roller 150 and the fourth guide roller 151.

[0060] It can be seen that by setting the third guide roller 150 and the fourth guide roller 151, the diaphragm 30 is constrained when stacking diaphragms 30, and a second roller group 15 with simple structure and low cost is provided.

[0061] Please see Figure 4 and Figure 5 As shown, in one embodiment, the swing-type coating mechanism 10 further includes a base 110 and a third drive member 111. The substrate 11 is mounted on the base 110 in a reciprocating manner along a first direction. The fixed end of the third drive member 111 is mounted on the base 110, and the driving end of the third drive member 111 is connected to the substrate 11. The third drive member 111 is configured to drive the substrate 11 to reciprocate along the first direction to adjust the position of the diaphragm 30 in the first direction.

[0062] Specifically, the third drive unit 111 is a linear module consisting of a motor, a lead screw, and a lead screw nut.

[0063] Specifically, in order to ensure the smooth reciprocating movement of the substrate 11 along the first direction, a sliding guide pair consisting of a linear guide rail and a slider is provided between the substrate 11 and the base 110.

[0064] As can be seen, through the cooperation of the third driving component 111 and the substrate 11, the substrate 11 is driven to reciprocate along the first direction, thereby adjusting the position of the diaphragm 30 in the first direction, so as to perform online correction of the diaphragm 30.

[0065] Please see 2 and Figure 5 As shown, in one embodiment, the swing-type coating mechanism 10 also includes a diaphragm cutting assembly 17, which is disposed on the outside of the substrate 11 and is configured to cut the diaphragm 30 in the swing member 13 from the diaphragm 30 of the cell on the stacking stage 20.

[0066] As can be seen, by setting the diaphragm cutting component 17, the diaphragm 30 inside the swing member 13 and the diaphragm 30 of the cell on the stacking stage 20 are automatically cut apart, and then the next cell is stacked. At the same time, the diaphragm cutting component 17 is independently set on the outside of the substrate 11 to adapt to the coating mechanism to perform swing coating, which is a reasonable layout.

[0067] In one embodiment, the diaphragm cutting assembly 17 includes a fourth drive member 170 and a cutter member 171 extending along a first direction. The drive end of the fourth drive member 170 is connected to the cutter member 171. The fourth drive member 170 is configured to drive the cutter member 171 down to approach and cut the diaphragm 30.

[0068] Specifically, the fourth drive unit 170 adopts a vertically arranged cylinder or linear module.

[0069] Specifically, the cutting part 171 is cut using a hot cutting knife.

[0070] As can be seen, the fourth driving component 170 drives the cutting component 171 to descend, approach and cut the diaphragm 30, providing a diaphragm cutting assembly 17 with a simple structure and stable and reliable operation; at the same time, the hot cutting blade performs hot melting cutting on the diaphragm 30 to ensure the flatness of the cut surface of the diaphragm 30.

[0071] Please see Figure 1 and Figure 5 As shown, in one embodiment, the oscillating coating mechanism 10 further includes a tension blocking assembly 18 mounted on the substrate 11. The tension blocking assembly 18 is located on the moving path of the diaphragm 30 from the diaphragm feeding mechanism 40 to the first roller group 14. The tension blocking assembly 18 is configured to adsorb the diaphragm 30 delivered by the diaphragm feeding mechanism 40 and deliver the adsorbed diaphragm 30 to the first roller group 14, so as to prevent the tension on the diaphragm 30 delivered by the diaphragm feeding mechanism 40 from being transmitted to the diaphragm 30 at the first roller group 14.

[0072] Specifically, the tension isolation assembly 18 includes a conveying drive 180, a conveying member 181, and a vacuum assembly. The conveying member 181 is rotatably mounted on the substrate 11. The fixed end of the rotating drive 180 is mounted on the substrate 11. The driving end of the conveying drive 180 is connected to the conveying member 181. The conveying drive 180 is configured to drive the conveying member 181 to rotate to convey the diaphragm 30. The vacuum assembly is configured to form a negative pressure at the conveying end where the conveying member 181 contacts the diaphragm 30, so as to adsorb the diaphragm 30 onto the conveying end of the conveying member 181, thereby creating tension isolation at the front and rear sections of the conveying end of the conveying member 181.

[0073] Specifically, the conveying drive unit 180 includes a motor and a transmission gear set, and the motor drives the conveying unit 181 to rotate through the transmission gear set.

[0074] It can be seen that by setting the tension isolation component 18 on the moving path of the diaphragm 30 from the diaphragm feeding mechanism 40 to the first roller group 14, the tension on the diaphragm 30 fed by the diaphragm feeding mechanism 40 during the stacking process is prevented from being transmitted to the first roller group 14, thus ensuring that the tension of the diaphragm 30 is constant during the stacking process; at the same time, by using adsorption and single-sided contact with the diaphragm 30 to isolate the tension of the diaphragm 30, the tension of the diaphragm 30 is isolated while avoiding damage to the diaphragm 30.

[0075] The swing-type coating mechanism proposed in this application has the following advantages:

[0076] 1) During the stacking process, the diaphragm always swings back and forth around the first roller group as the swing center, so that the length of the diaphragm from the discharge end of the diaphragm feeding mechanism to the stacking table remains basically unchanged, ensuring that the tension change of the diaphragm during the stacking process is very small, which greatly improves the flatness of the cells after stacking.

[0077] 2) The use of a swing-type film delivery method is beneficial to improving the stacking efficiency;

[0078] 3) It can adjust the position of the diaphragm in the first direction to achieve online diaphragm correction;

[0079] 4) An independent diaphragm cutting assembly is set on the outside of the substrate, which realizes the automatic cutting of the diaphragm in the swing component and the diaphragm of the cell on the stacking table. At the same time, it can be adapted to the coating mechanism to carry out swing-type coating, and the layout is reasonable.

[0080] 5) The diaphragm fed by the diaphragm feeding mechanism is tension-isolated by adsorption, which ensures that the tension of the diaphragm is constant during the stacking process and avoids damage to the diaphragm.

[0081] Secondly, this application also proposes a stacking machine, please refer to [link to relevant documentation]. Figures 4 to 6As shown, the stacking machine provided in this application embodiment includes a diaphragm feeding mechanism 40, the aforementioned oscillating coating mechanism 10, an electrode feeding mechanism, and a stacking table 20. The diaphragm feeding mechanism 40 is configured to supply diaphragms 30 to the oscillating coating mechanism 10; the oscillating coating mechanism 10 is configured to receive the diaphragms 30 supplied by the diaphragm feeding mechanism 40 and stack the received diaphragms 30 on the stacking table 20 according to stacking rules; the electrode feeding mechanism is configured to alternately feed positive and negative electrode sheets to the stacking table 20; the stacking table 20 is configured to cooperate with the electrode feeding mechanism and the oscillating coating mechanism 10 to alternately stack the sequentially received positive and negative electrode sheets between two adjacent layers of diaphragms to form a battery cell.

[0082] As can be seen, through the cooperation of the diaphragm feeding mechanism 40, the swing-type coating mechanism 10, the electrode feeding mechanism and the stacking table 20, the positive electrode, negative electrode and diaphragm are automatically stacked to form a battery cell. At the same time, the swing-type coating mechanism 10 uses a swinging method to stack the diaphragm 30 on the stacking table 20. During the stacking process, the diaphragm 30 always swings back and forth around the first roller group 14 as the swing center, so that the length of the diaphragm 30 from the discharge end of the diaphragm feeding mechanism 40 to the stacking table 20 remains basically unchanged, ensuring that the tension change of the diaphragm 30 during the stacking process is very small, which greatly improves the flatness of the battery cell after stacking.

[0083] In one embodiment, the stacking machine also includes two pairs of pressing mechanisms 21. The two pairs of pressing mechanisms 21 are arranged at both ends of the stacking table 20 along the direction of the diaphragm 30. The two pressing mechanisms 21 of each pair of pressing mechanisms 21 are arranged opposite each other on both sides of the stacking table 20. The two pairs of pressing mechanisms 21 are used to press the laid positive or negative electrode sheet in turn. The pressing action of the pressing mechanism 21 and the reciprocating swing of the swing coating mechanism 10 cooperate to achieve the folding of the diaphragm 30.

[0084] By having two pairs of pressing mechanisms 21 press down on the laid positive or negative electrode sheets in turn, the cell structure formed by stacking can be ensured to be compact.

[0085] In one implementation, the electrode feeding mechanism includes a positive electrode feeding mechanism 50 and a negative electrode feeding mechanism 60. The positive electrode feeding mechanism 50 includes a positive electrode feeding assembly 51, a positive electrode correction assembly 52, and a positive electrode transport assembly 53. The positive electrode feeding assembly 51 is configured to pick up positive electrodes and transport them to the positive electrode correction assembly 52. ​​The positive electrode correction assembly 52 is configured to receive the positive electrodes transported by the positive electrode feeding assembly 51, and perform correction after detecting the received positive electrodes. The positive electrode transport assembly 53 is configured to transport the positive electrode from the positive electrode correction assembly 52 to the negative electrode feeding assembly 60. The positive electrode sheet after the correction is performed is transported to the stacking table 20; the negative electrode sheet feeding mechanism 60 includes a negative electrode sheet feeding component 61, a negative electrode sheet correction component 62 and a negative electrode sheet transport component 63. The negative electrode sheet feeding component 61 is configured to pick up the negative electrode sheet and transport the picked-up negative electrode sheet to the negative electrode sheet correction component 62. The negative electrode sheet correction component 62 is configured to receive the negative electrode sheet transported by the negative electrode sheet feeding component 61, and perform correction after detecting the received negative electrode sheet. The negative electrode sheet transport component 63 is configured to transport the negative electrode sheet after the correction is performed on the negative electrode sheet correction component 62 to the stacking table 20.

[0086] Specifically, the positive electrode feeding assembly 51 is also configured to transport defective products on the positive electrode correction assembly 52 to the waste box; the negative electrode feeding assembly 61 is also configured to transport defective products on the negative electrode correction assembly 62 to the waste box.

[0087] The feeding process of the aforementioned positive electrode feeding mechanism 50 is as follows:

[0088] The positive electrode feeding assembly 51 picks up the positive electrode from the positive electrode material box and transports the picked-up positive electrode to the positive electrode correction assembly 52;

[0089] The positive electrode sheet correction component 52 receives the positive electrode sheet transported by the positive electrode sheet feeding component 51 and inspects the appearance and position of the positive electrode sheet. If it is a defective product, the positive electrode sheet feeding component 51 transports the defective product on the positive electrode sheet correction component 52 to the waste box. If the position of the positive electrode sheet is inaccurate, the positive electrode sheet correction component 52 corrects the position of the positive electrode sheet on it.

[0090] The positive electrode transfer assembly 53 transfers the positive electrode after it has been corrected on the positive electrode correction assembly 52 to the stacking stage 20.

[0091] The feeding process of the aforementioned negative electrode feeding mechanism 60 is as follows:

[0092] The negative electrode feeding assembly 61 picks up the negative electrode from the negative electrode material box and transports the picked-up negative electrode to the negative electrode correction assembly 62;

[0093] The negative electrode sheet correction component 62 receives the negative electrode sheet transported by the negative electrode sheet feeding component 61 and inspects the appearance and position of the negative electrode sheet. If it is a defective product, the negative electrode sheet feeding component 61 transports the defective product on the negative electrode sheet correction component 62 to the waste box. If the position of the negative electrode sheet is inaccurate, the negative electrode sheet correction component 62 corrects the position of the negative electrode sheet on it.

[0094] The negative electrode transfer assembly 63 transfers the negative electrode after it has been corrected on the negative electrode correction assembly 62 to the stacking stage 20.

[0095] It can be seen that the cooperation of the positive electrode feeding component 51, the positive electrode correction component 52 and the positive electrode transport component 53 realizes the automatic detection, correction and feeding of the positive electrode; the cooperation of the negative electrode feeding component 61, the negative electrode correction component 62 and the negative electrode transport component 63 realizes the automatic detection, correction and feeding of the negative electrode.

[0096] The principle of the stacking of battery cells in the stacking machine proposed in this application embodiment is as follows:

[0097] For example, in actual operation, a pair of pressing mechanisms 21 at one end of the stacking table 20 presses down the negative electrode sheet to ensure the positional stability of the negative electrode sheet on the separator 30. Then, the working combination of the stacking table 20 and the swing-type coating mechanism 10 is used to fold the separator 30 in one direction and lay it on the negative electrode sheet. Then, the positive electrode sheet is placed on the current separator 30. Then, a pair of pressing mechanisms 21 at the other end of the stacking table 20 press down the positive electrode sheet, and the working combination of the stacking table 20 and the swing-type coating mechanism 10 is used to press the separator 30 on the positive electrode sheet. This cycle of folding the separator, placing the negative electrode sheet, folding the separator, and placing the positive electrode sheet is repeated until the number of stacked layers meets the process requirements.

[0098] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above examples. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A swing-type coating mechanism for stacking diaphragms on a stacking table, characterized in that, The oscillating coating mechanism includes a substrate, a first driving component, an oscillating component, a first roller group, and a second roller group, wherein: The first end of the swing member along its own height direction is rotatably mounted on the substrate. The first roller group is mounted on the first end of the swing member and extends along the first direction. The second roller group is mounted on the second end of the swing member along its own height direction and extends along the first direction. The diaphragm fed by the diaphragm feeding mechanism passes through the first roller group and the second roller group in sequence and is then conveyed to the stacking table. Both the first roller group and the second roller group are configured to define the movement path of the diaphragm. The driving end of the first driving member is connected to the first end of the swing member. The first driving member is configured to drive the first end of the swing member to rotate, so that the diaphragm swings back and forth around the first roller group as the swing center, thereby stacking the diaphragm left and right on the stacking table.

2. The swing-type coating mechanism according to claim 1, characterized in that, The first roller group includes a first guide roller and a second guide roller spaced parallel to each other. Both the first guide roller and the second guide roller can rotate along their own axes. The diaphragm fits through the gap between the first guide roller and the second guide roller, and the swing center of the diaphragm is located between the first guide roller and the second guide roller.

3. The swing-type coating mechanism according to claim 1, characterized in that, The swing member is provided with a second driving member, and the second roller group is mounted on the swing member in a reciprocating sliding manner along the height direction of the swing member. The driving end of the second driving member is connected to the second roller group, and the second driving member is configured to drive the second roller group to reciprocate sliding along the height direction of the swing member. When the oscillating member swings to the maximum stroke on the first side of the oscillation center or to the maximum stroke on the second side of the oscillation center, the second driving member drives the second roller group to extend out of the oscillating member to approach the upper surface of the stacked cells on the stacking table.

4. The swing-type coating mechanism according to claim 1, characterized in that, The second roller group includes a third guide roller and a fourth guide roller that are spaced apart and parallel to each other. Both the third guide roller and the fourth guide roller can rotate along their own axis. The diaphragm is attached through the gap between the third guide roller and the fourth guide roller.

5. The swing-type coating mechanism according to claim 1, characterized in that, The swing-type coating mechanism further includes a base and a third driving member. The substrate is reciprocally mounted on the base in a first direction. The fixed end of the third driving member is mounted on the base, and the driving end of the third driving member is connected to the substrate. The third driving member is configured to drive the substrate to reciprocate in the first direction to adjust the position of the diaphragm in the first direction.

6. The swing-type coating mechanism according to claim 1, characterized in that, The swing-type coating mechanism further includes a diaphragm cutting assembly disposed on the outside of the substrate, and the diaphragm cutting assembly is configured to cut the diaphragm in the swing member from the diaphragm of the cell on the stacking stage.

7. The swing-type coating mechanism according to claim 6, characterized in that, The diaphragm cutting assembly includes a fourth driving member and a cutting member, wherein: The cutting member extends along the first direction, and the driving end of the fourth driving member is connected to the cutting member. The fourth driving member is configured to drive the cutting member to descend to approach and cut the diaphragm.

8. The swing-type coating mechanism according to claim 1, characterized in that, The oscillating coating mechanism further includes a tension blocking assembly mounted on the substrate. The tension blocking assembly is located on the movement path of the diaphragm from the diaphragm feeding mechanism to the first roller group. The tension blocking assembly is configured to adsorb the diaphragm delivered by the diaphragm feeding mechanism and deliver the adsorbed diaphragm to the first roller group to prevent the tension on the diaphragm delivered by the diaphragm feeding mechanism from being transmitted to the diaphragm at the first roller group.

9. A stacking machine, characterized in that, The stacking machine includes a diaphragm feeding mechanism, a swing-type coating mechanism as described in any one of claims 1-8, an electrode feeding mechanism, and a stacking table, wherein: The diaphragm feeding mechanism is configured to supply a diaphragm to the oscillating coating mechanism; The swing-type film-coating mechanism is configured to receive the diaphragm supplied by the diaphragm feeding mechanism and stack the received diaphragm on the stacking table according to the stacking rules. The electrode feeding mechanism is configured to alternately feed positive and negative electrode sheets to the stacking table; The stacking stage is configured to cooperate with the electrode feeding mechanism and the oscillating coating mechanism to alternately stack the sequentially received positive and negative electrode sheets between two adjacent layers of separators to form a battery cell.

10. The stacking machine according to claim 9, characterized in that, The stacking machine also includes two pairs of pressing mechanisms. The two pairs of pressing mechanisms are arranged at both ends of the stacking table along the direction of the diaphragm laying. The two pressing mechanisms of each pair are arranged opposite each other on both sides of the stacking table. The two pairs of pressing mechanisms are used to press down the laid positive or negative electrode sheets in turn. The pressing action of the pressing mechanism and the reciprocating swing of the oscillating coating mechanism cooperate to achieve the folding of the diaphragm.

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