A device and method for turning over the first layer diaphragm of a lithium battery laminate

Abstract

The present invention relates to the technical field of lithium battery stacking, and specifically to a device and method for flipping the first layer diaphragm of a lithium battery stack; the device and method comprise two groups of flipping modules, a support seat, a stacking platform and a plurality of diaphragm translation rollers, the support seat being arranged above the stacking platform, each group of flipping modules being connected to the support seat respectively, and the two groups of flipping modules being arranged symmetrically, and each diaphragm translation roller being arranged above the stacking platform; the flipping module comprises a diaphragm vacuum suction rod, a diaphragm avoidance cylinder and a diaphragm flipping rotating shaft, the diaphragm avoidance cylinder being connected to the support seat, the diaphragm flipping rotating shaft being connected to the output end of the diaphragm avoidance cylinder, and the diaphragm vacuum suction rod being connected to the diaphragm flipping rotating shaft. Through the above structure, the flipping efficiency of the diaphragm is improved, thereby improving the production efficiency of the lithium battery.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery stacks, and in particular to a device and method for turning over a first-layer diaphragm of a lithium battery stack. Background Art

[0002] With the continuous updates and iterations in the field of power batteries, long-blade batteries have become the leader in the new energy industry. Due to the long battery cells, the winding needle is too long to be produced and the tail winding function cannot be realized. In order to increase the energy density of single battery cells, battery cell manufacturers have modified the battery cell stacking process to require a single-layer diaphragm for the first and last layers.

[0003] Since the manufacturing process of the battery cell requires that the first and last electrode sheets are both negative electrode sheets, and a layer of separator must be attached to the outside of the negative electrode sheets, when the last layer of a battery cell is stacked with a negative electrode sheet and a layer of separator is attached to the upper surface, the battery cell separator is cut and the battery cell is taken away by the robot. For the production of the next battery cell, the first layer needs to be stacked with a negative electrode sheet, and the separator needs to be flipped to the other side before the first layer of negative electrode sheet can be stacked. Currently, manual flipping is used, and the flipping efficiency is low, which affects the production efficiency of lithium batteries. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for turning over the first layer of the diaphragm of a lithium battery stack, aiming to solve the technical problem in the prior art that the turning efficiency of the diaphragm is low, which affects the production efficiency of lithium batteries.

[0005] To achieve the above-mentioned purpose, the present invention adopts a lithium battery stacking first layer diaphragm flipping device, comprising two sets of flipping modules, a support base, a stacking table and a plurality of diaphragm translation rollers, wherein the support base is arranged above the stacking table, each set of the flipping modules is respectively connected to the support base, and the two sets of the flipping modules are symmetrically arranged, and each of the diaphragm translation rollers is arranged above the stacking table;

[0006] The flipping module includes a diaphragm vacuum suction rod, a diaphragm avoidance cylinder and a diaphragm flipping rotating shaft, the diaphragm avoidance cylinder is connected to the support seat, the diaphragm flipping rotating shaft is connected to the output end of the diaphragm avoidance cylinder, and the diaphragm vacuum suction rod is connected to the diaphragm flipping rotating shaft.

[0007] The device for turning over the first-layer diaphragm of the lithium battery stack further comprises a deviation correction module, which is connected to the support seat.

[0008] Among them, the correction module includes a diaphragm edge correction suction plate and a diaphragm correction servo shaft, the diaphragm correction servo shaft is connected to the support seat and is located between the two groups of flip modules, and the diaphragm edge correction suction plate is connected to the diaphragm correction servo shaft.

[0009] Among them, the lithium battery stack first layer diaphragm turning over device also includes a diaphragm edge detection sensor, and the diaphragm edge correction suction plate is provided with the diaphragm edge detection sensor.

[0010] Among them, the lithium battery stack first layer diaphragm turning over device also includes a diaphragm cutting end face detection sensor, and the diaphragm edge correction suction plate is provided with the diaphragm cutting end face detection sensor.

[0011] The present invention also provides a method for turning over the first-layer diaphragm of a lithium battery laminate, comprising the following steps:

[0012] The battery cell is clamped and moved horizontally out of the lamination table, the diaphragm is cut, and the battery cell is removed;

[0013] The diaphragm avoidance cylinder is driven to extend, driving the diaphragm vacuum suction rod to move, the end surface of the diaphragm vacuum suction rod is opened to avoid the edge of the diaphragm, and the diaphragm turning rotation axis drives the diaphragm vacuum suction rod to rotate from the right side of the lamination table to the left side of the lamination table;

[0014] The diaphragm avoidance cylinder is driven to extend, and the diaphragm vacuum suction rod rotates from the left side to the right side of the lamination table, and at the same time, the diaphragm vacuum suction rod is vacuum-activated;

[0015] The diaphragm translation roller is translated from the right side to the left side of the lamination platform. At this time, the diaphragm vacuum suction rod is in place first, and the diaphragm translation roller is moved again. The diaphragm vacuum suction rod and the diaphragm translation roller are avoided on the right side of the lamination platform.

[0016] When the diaphragm vacuum suction rod contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod, and the diaphragm vacuum suction rod adsorbs the diaphragm from the left side of the lamination table;

[0017] The diaphragm is moved to the right side of the lamination table to perform a diaphragm deviation correction movement.

[0018] The present invention provides a device and method for flipping the first layer diaphragm of a lithium battery stack. The two groups of flipping modules are symmetrically arranged. The flipping modules include a diaphragm vacuum suction rod, a diaphragm avoidance cylinder and a diaphragm flipping rotating shaft. During the flipping process, the battery cell is clamped and translated out of the stacking table, the diaphragm is cut, and the battery cell is taken away. The diaphragm avoidance cylinder is driven to extend, driving the diaphragm vacuum suction rod to move. The end face of the diaphragm vacuum suction rod is opened to avoid the edge of the diaphragm. The diaphragm flipping rotating shaft drives the diaphragm vacuum suction rod to rotate from the right side of the stacking table to the left side of the stacking table, driving the diaphragm avoidance cylinder to extend, and the diaphragm vacuum suction rod is moved from the stacking table to the left side of the stacking table. The left side of the platform rotates to the right, and at the same time, the vacuum of the diaphragm vacuum suction rod is turned on, and the diaphragm is translated over the roller and translated from the right side to the left side of the stacking platform. At this time, the diaphragm vacuum suction rod is in place first, and the diaphragm is translated over the rod and then moves. The diaphragm vacuum suction rod and the diaphragm translation rod avoid the right side of the stacking platform. When the diaphragm vacuum suction rod contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod, and the diaphragm vacuum suction rod adsorbs the diaphragm from the left side of the stacking platform and moves the diaphragm to the right side of the stacking platform to perform diaphragm correction movement, thereby improving the flipping efficiency of the diaphragm, thereby improving the production efficiency of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of the first-layer diaphragm turning-over device for a lithium battery laminate of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of the first-layer diaphragm turning-over device for a lithium battery stack of the present invention.

[0022] Figure 3 It is a flow chart of the steps of the method for turning over the first layer diaphragm of a lithium battery laminate of the present invention.

[0023] Figure 4 It is a flow chart of the steps of diaphragm deviation correction of the present invention.

[0024] 10- flipping module, 11- diaphragm vacuum suction rod, 12- diaphragm avoidance cylinder, 13- diaphragm flipping rotation axis, 20- diaphragm edge correction suction plate, 30- diaphragm correction servo axis, 40- diaphragm edge detection sensor, 50- diaphragm cutting end face detection sensor, 60- diaphragm translation roller, 70- support seat, 80- stacking table. DETAILED DESCRIPTION

[0025] See also Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the structure of the first layer diaphragm flipping device for lithium battery stacks. Figure 2 It is a partial structural diagram of the first-layer diaphragm flipping device of the lithium battery stack.

[0026] The present invention provides a device for turning over the first-layer diaphragm of a lithium battery stack, comprising two sets of turning modules 10, a support base 70, a stacking platform 80, and a plurality of diaphragm translation rollers 60. The support base 70 is disposed above the stacking platform 80, and each set of the turning modules 10 is connected to the support base 70, respectively. The two sets of the turning modules 10 are symmetrically disposed, and each diaphragm translation roller 60 is disposed above the stacking platform 80.

[0027] The flipping module 10 includes a diaphragm vacuum suction rod 11, a diaphragm avoidance cylinder 12 and a diaphragm flipping rotating shaft 13. The diaphragm avoidance cylinder 12 is connected to the support seat 70, and the diaphragm flipping rotating shaft 13 is connected to the output end of the diaphragm avoidance cylinder 12. The diaphragm vacuum suction rod 11 is connected to the diaphragm flipping rotating shaft 13.

[0028] In this embodiment, the two groups of flipping modules 10 are symmetrically arranged, and the flipping module 10 includes a diaphragm vacuum suction rod 11, a diaphragm avoidance cylinder 12 and a diaphragm flipping rotating shaft 13. During the flipping process, the battery cell is clamped and translated out of the stacking table 80, the diaphragm is cut, and the battery cell is removed, the diaphragm avoidance cylinder 12 is driven to extend, driving the diaphragm vacuum suction rod 11 to move, and the end face of the diaphragm vacuum suction rod 11 is opened to avoid the edge of the diaphragm, and the diaphragm flipping rotating shaft 13 drives the diaphragm vacuum suction rod 11 to rotate from the right side of the stacking table 80 to the left side of the stacking table 80, driving the diaphragm avoidance cylinder 12 to extend, and the diaphragm vacuum suction rod 11 is rotated from the left side of the stacking table 80 The left side rotates to the right side, and at the same time, the vacuum of the diaphragm vacuum suction rod 11 is turned on, and the diaphragm is translated over the roller 60 from the right side of the stacking platform 80 to the left side. At this time, the diaphragm vacuum suction rod 11 is in place first, and the diaphragm is translated over the rod and then moves. The diaphragm vacuum suction rod 11 and the diaphragm translation rod avoid the right side of the stacking platform 80. When the diaphragm vacuum suction rod 11 contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod 11, and the diaphragm vacuum suction rod 11 adsorbs the diaphragm from the left side of the stacking platform 80, and puts the diaphragm to the right side of the stacking platform 80 to perform diaphragm correction movement, thereby improving the flipping efficiency of the diaphragm, thereby improving the production efficiency of lithium batteries.

[0029] Furthermore, the lithium battery stack first layer diaphragm flipping device further includes a deviation correction module, and the deviation correction module is connected to the support seat 70.

[0030] Furthermore, the correction module includes a diaphragm edge correction suction plate 20 and a diaphragm correction servo shaft 30, the diaphragm correction servo shaft 30 is connected to the support seat 70 and is located between the two groups of flip modules 10, and the diaphragm edge correction suction plate 20 is connected to the diaphragm correction servo shaft 30.

[0031] Furthermore, the lithium battery stack first layer diaphragm turning device further includes a diaphragm edge detection sensor 40 , and the diaphragm edge correction suction plate 20 is provided with the diaphragm edge detection sensor 40 .

[0032] Furthermore, the lithium battery stack first layer diaphragm turning over device further includes a diaphragm cutting end face detection sensor 50 , and the diaphragm edge deviation correction suction plate 20 is provided with the diaphragm cutting end face detection sensor 50 .

[0033] In this embodiment, the correction module is used to correct the diaphragm. During the correction process, the diaphragm is placed to the right side of the stacking platform 80, and the diaphragm translation roller 60 continues to translate the diaphragm to the left side of the stacking platform 80. At the same time, the diaphragm edge correction suction plate 20 on the right side of the stacking platform 80 adsorbs the diaphragm. Under the action of the diaphragm correction servo shaft 30, the diaphragm edge is brought close to the diaphragm edge detection sensor 40, and the diaphragm cutting end face is brought close to the diaphragm cutting end face detection sensor 50 under the action of the diaphragm translation roller's tension. When the diaphragm edge detection sensor 40 and the diaphragm cutting end face detection sensor 50 respectively sense signals, the diaphragm correction is completed, the diaphragm translation roller 60 and the diaphragm correction servo shaft 30 correct the side and end face of the diaphragm on the stacking platform 80 into place, the diaphragm flipping action is completed, the pressing knife on the stacking platform 80 presses the diaphragm edge, and the next stacking action is performed.

[0034] See also Figure 3 and Figure 4 ,in Figure 3 This is a flow chart of the steps for turning over the first layer of the diaphragm of a lithium battery stack. Figure 4 It is a flow chart of the steps for diaphragm correction.

[0035] The present invention also provides a method for turning over the first-layer diaphragm of a lithium battery laminate, comprising the following steps:

[0036] S1: The battery cell is clamped and moved horizontally out of the lamination table 80, the diaphragm is cut, and the battery cell is removed;

[0037] S2: driving the diaphragm avoidance cylinder 12 to extend, driving the diaphragm vacuum suction rod 11 to move, the end surface of the diaphragm vacuum suction rod 11 to open and avoid the edge of the diaphragm, and the diaphragm turning rotation axis 13 drives the diaphragm vacuum suction rod 11 to rotate from the right side of the lamination table 80 to the left side of the lamination table 80;

[0038] S3: driving the diaphragm avoidance cylinder 12 to extend, and the diaphragm vacuum suction rod 11 rotates from the left side to the right side of the lamination table 80, and at the same time, the diaphragm vacuum suction rod 11 is vacuum-activated;

[0039] S4: The membrane translation roller 60 is translated from the right side to the left side of the lamination table 80. At this time, the membrane vacuum suction rod 11 is in place first, and the membrane translation roller moves next. The membrane vacuum suction rod 11 and the membrane translation roller avoid the right side of the lamination table 80.

[0040] S5: When the diaphragm vacuum suction rod 11 contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod 11, and the diaphragm vacuum suction rod 11 adsorbs the diaphragm from the left side of the lamination table 80;

[0041] S6: The diaphragm is moved to the right side of the lamination table 80, and the diaphragm is corrected to complete the diaphragm turning over.

[0042] In this embodiment, a robotic arm is first used to clamp the battery cell and move it horizontally out of the stacking table 80, cut the diaphragm, and remove the battery cell. Then, the diaphragm avoidance cylinder 12 is driven to extend, driving the diaphragm vacuum suction rod 11 to move. The end face of the diaphragm vacuum suction rod 11 is opened to avoid the edge of the diaphragm. The diaphragm flip rotation axis 13 drives the diaphragm vacuum suction rod 11 to rotate from the right side of the stacking table 80 to the left side of the stacking table 80. Then, the diaphragm avoidance cylinder 12 is driven to extend, and the diaphragm vacuum suction rod 11 rotates from the left side of the stacking table 80 to the right side. At the same time, the vacuum of the diaphragm vacuum suction rod 11 is turned on, and the diaphragm is translated over the roller 60 and removed from the stacking table 80. 0 is translated from the right side to the left side, at this time the diaphragm vacuum suction rod 11 is in place first, the diaphragm is translated over the rod and then moves, the diaphragm vacuum suction rod 11 and the diaphragm is translated over the rod to avoid the right side of the stacking table 80, when the diaphragm vacuum suction rod 11 contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod 11, the diaphragm vacuum suction rod 11 adsorbs the diaphragm from the left side of the stacking table 80, and then puts the diaphragm to the right side of the stacking table 80, performs the diaphragm correction movement, and completes the diaphragm flipping. The adsorption effect is to prevent the diaphragm from causing excessive deviation during movement and exceeding the correction range, thereby improving the flipping efficiency of the diaphragm, thereby improving the production efficiency of lithium batteries.

[0043] Furthermore, in the step of placing the diaphragm to the right side of the lamination table 80 and performing a diaphragm deviation correction movement to complete the diaphragm turning over:

[0044] S61: The diaphragm is translated to the left side of the lamination platform 80, and at the same time, the diaphragm edge correction suction plate 20 on the right side of the lamination platform 80 adsorbs the diaphragm;

[0045] S62: Under the action of the diaphragm correction servo shaft 30, the diaphragm edge is brought close to the diaphragm edge detection sensor 40, and the diaphragm cutting end face is brought close to the diaphragm cutting end face detection sensor 50 under the pulling force of the diaphragm translation roller;

[0046] S63: When the diaphragm edge detection sensor 40 and the diaphragm cutting end face detection sensor 50 respectively sense signals, that is, the diaphragm correction is completed, the diaphragm translation roller 60 and the diaphragm correction servo axis 30 correct the side and end faces of the diaphragm on the stacking table 80 to be in place, the diaphragm flipping action is completed, the pressing knife on the stacking table 80 presses the diaphragm edge, and the next stacking action is carried out.

[0047] In this embodiment, the diaphragm is placed to the right side of the stacking platform 80, and the diaphragm translation roller 60 continues to translate the diaphragm to the left side of the stacking platform 80. At the same time, the diaphragm edge correction suction plate 20 on the right side of the stacking platform 80 adsorbs the diaphragm. Under the action of the diaphragm correction servo shaft 30, the diaphragm edge is brought close to the diaphragm edge detection sensor 40, and the diaphragm cutting end face is brought close to the diaphragm cutting end face detection sensor 50 under the action of the tension of the diaphragm translation roller. When the diaphragm edge detection sensor 40 and the diaphragm cutting end face detection sensor 50 respectively sense signals, that is, the diaphragm correction is completed, the diaphragm translation roller 60 and the diaphragm correction servo shaft 30 correct the side and end face of the diaphragm on the stacking platform 80 into place, the diaphragm flipping action is completed, the pressing knife on the stacking platform 80 presses the diaphragm edge, and the next stacking action is performed.

[0048] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A device for turning over the first layer of the diaphragm of a lithium battery laminate, characterized in that: It includes two groups of flip modules, a support base, a laminating platform and a plurality of membrane translation rollers. The support base is arranged above the laminating platform. Each group of flip modules is connected to the support base respectively. The two groups of flip modules are symmetrically arranged. Each membrane translation roller is arranged above the laminating platform. The flip module includes a diaphragm vacuum suction rod, a diaphragm avoidance cylinder and a diaphragm flip rotation shaft, wherein the diaphragm avoidance cylinder is connected to the support seat, the diaphragm flip rotation shaft is connected to the output end of the diaphragm avoidance cylinder, and the diaphragm vacuum suction rod is connected to the diaphragm flip rotation shaft; The lithium battery stack first layer diaphragm turning device further includes a deviation correction module, which is connected to the support seat; The correction module includes a diaphragm edge correction suction plate and a diaphragm correction servo shaft. The diaphragm correction servo shaft is connected to the support seat and is located between the two groups of flip modules. The diaphragm edge correction suction plate is connected to the diaphragm correction servo shaft.

2. The device for turning over the first layer of the lithium battery laminate according to claim 1, characterized in that: The lithium battery stack first layer diaphragm turning device further comprises a diaphragm edge detection sensor, and the diaphragm edge correction suction plate is provided with the diaphragm edge detection sensor.

3. The device for turning over the first layer of the lithium battery laminate as claimed in claim 1, characterized in that: The lithium battery stack first layer diaphragm turning over device further comprises a diaphragm cutting end face detection sensor, and the diaphragm edge deviation correction suction plate is provided with the diaphragm cutting end face detection sensor.

4. A method for turning over the first layer diaphragm of a lithium battery laminate, applied to the device for turning over the first layer diaphragm of a lithium battery laminate as claimed in claim 1, characterized in that: The steps include: The battery cell is clamped and moved horizontally out of the lamination table, the diaphragm is cut, and the battery cell is removed; The diaphragm avoidance cylinder is driven to extend, driving the diaphragm vacuum suction rod to move, the end surface of the diaphragm vacuum suction rod is opened to avoid the edge of the diaphragm, and the diaphragm turning rotation axis drives the diaphragm vacuum suction rod to rotate from the right side of the lamination table to the left side of the lamination table; The diaphragm avoidance cylinder is driven to extend, and the diaphragm vacuum suction rod rotates from the left side to the right side of the lamination table, and at the same time, the diaphragm vacuum suction rod is vacuum-activated; The diaphragm translation roller is translated from the right side to the left side of the lamination platform. At this time, the diaphragm vacuum suction rod is in place first, and the diaphragm translation roller is moved again. The diaphragm vacuum suction rod and the diaphragm translation roller are avoided on the right side of the lamination platform. When the diaphragm vacuum suction rod contacts the diaphragm, the diaphragm is adsorbed on the surface of the diaphragm vacuum suction rod, and the diaphragm vacuum suction rod adsorbs the diaphragm from the left side of the lamination table; The diaphragm is moved to the right side of the lamination table to perform a diaphragm deviation correction movement.

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