Automatic lamination machine for battery production
By designing a limiting plate and ion airflow, the problems of separator damage and electrode deformation in battery stacking machines are solved, enabling efficient and safe placement of the electrodes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGGUAN VISANA ELECTRONIC TECH CO LTD
- Filing Date
- 2025-12-31
- Publication Date
- 2026-07-24
AI Technical Summary
Existing battery stacking machines are prone to causing separator damage and electrode deformation when pressing the electrode sheet down on the tilted separator.
The diaphragm is first pressed down by the arc surface of the limiting plate one, so that the electrode is placed in contact with the diaphragm when it is horizontal. The electrode is then corrected and positioned by the limiting plate two, and static electricity and dust are removed by ion wind. A double suction cup structure is designed to improve efficiency.
It effectively avoids diaphragm damage and electrode deformation, doubles electrode placement efficiency, and significantly enhances the protective effect of the diaphragm and electrode.
Smart Images
Figure CN121748471B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery stacking machines, and more particularly to an automatic stacking machine for battery production. Background Technology
[0002] In battery production, battery stacking is a crucial step. Most battery stacking machines consist of a membrane feeding structure and two sets of motorized suction cups on either side. These suction cups are used to pick up the positive and negative electrode sheets, respectively. The working process involves first fixing the first end of the separator to the stacking table. Then, the stacking table pulls the separator and moves it below the motorized suction cup that has picked up the positive electrode sheet. The motorized suction cup then lowers to place the positive electrode sheet onto the first layer of separator. The stacking table then moves in the opposite direction to the other side where the negative electrode sheet has been picked up. Below the electric suction cup, the separator is pulled out during the movement, and the second separator automatically covers the positive electrode. Then, the electric suction cup moves down to place the negative electrode on the second separator. At this time, an alternating stacking structure of separator-positive electrode-separator-negative electrode is formed. Then, the above process is repeated. The reciprocating motion of the stacking stage makes the separator stacked in a Z-shape. At the same time, the positive and negative electrodes are alternately placed between the separators, and the separators separate the positive and negative electrodes, finally forming a battery stack with a certain thickness.
[0003] However, the above process has the following drawbacks: When the electrode is placed on the diaphragm, the diaphragm between the membrane feeding structure and the stacking stage located on the side is in an inclined and taut state. It is necessary to use an electric suction cup to move the electrode down and press down on the inclined diaphragm so that the electrode is pressed on the diaphragm. During this process, the edge of the electrode presses down on the diaphragm. Since the edge of the electrode is relatively sharp, it is not only easy to damage the diaphragm, but the electrode is also easy to deform. Summary of the Invention
[0004] In order to overcome the shortcomings of existing battery stacking machines, which use the electrode sheets to press down on the inclined separator during the stacking process, which easily leads to the risk of separator breakage and electrode sheet deformation, this invention provides an automatic stacking machine for battery production.
[0005] The technical implementation scheme of the present invention is as follows: an automatic stacking machine for battery production includes a substrate, a stacking table, a conveyor frame, a mounting plate, and a suction cup; the stacking table is mounted on the substrate; the conveyor frame for conveying separators to the stacking table is mounted on the substrate; two mounting plates are movably disposed on the substrate; the two mounting plates are respectively distributed on both sides of the stacking table; each mounting plate is respectively mounted with a suction cup for picking up electrode sheets; it also includes a moving drive component and a limiting plate; the moving drive component is respectively mounted on both sides of the suction cup; each moving drive component is provided with a limiting plate at its driving end, the limiting plate having an arc surface, and the limiting plate flattens the separator through the arc surface.
[0006] More preferably, each of the moving drive components is equipped with a connecting frame at its drive end; the two limiting plates are rotatably mounted on the two connecting frames respectively, and the opposite sides of the two limiting plates are limiting surfaces; the bottom surface of the limiting plate is an inclined surface; a plurality of material boxes for placing electrode sheets are mounted on the substrate; the internal width of the material box is greater than the width of the electrode sheet.
[0007] More preferably, the limiting surface and the inclined surface are connected by the arc surface.
[0008] More preferably, the limiting plate is a hollow structure, and an air vent for ventilation is provided on the limiting surface.
[0009] More preferably, an air outlet 2 for air outlet is provided on the inclined surface of the limiting plate 1 on only one side.
[0010] More preferably, the air blown out by the first air outlet and the second air outlet is ionized air.
[0011] More preferably, both the first air outlet and the second air outlet are composed of multiple spaced sub-air outlets.
[0012] More preferably, a second movable driving component is installed on each of the other two sides of the suction cup; each of the second movable driving components is equipped with a second limiting plate for limiting the two sides of the electrode; the longitudinal section of the second limiting plate is the same as that of the first limiting plate.
[0013] More preferably, the suction nozzles of the suction cup are distributed at the four corners, and when the limiting plate is rotated so that the inclined surface faces directly upward, each inclined surface can cover the two suction nozzles on one side.
[0014] More preferably, two suction cups are mounted on the mounting plate, and the parts mounted on the two suction cups have the same structure, so that two electrode sheets can be placed on the stacking stage at a time.
[0015] Beneficial effects: The present invention utilizes the arc surface of the limiting plate to press down on the diaphragm first, so that the electrode will not come into contact with the tilted diaphragm. When the diaphragm is gradually pressed down to a horizontal state by the arc surface of the limiting plate, the electrode will come into contact with and be placed on the diaphragm, so that the electrode and the diaphragm will not be squeezed against each other, and the arc surface pressing down on the diaphragm will not easily damage the diaphragm.
[0016] Two suction cups are installed on the mounting plate (the parts installed on the two suction cups operate on the same principle), and two electrode sheets can be placed at a time on the stacking table. Therefore, two electrode sheets can be placed between the two diaphragms at a time, which doubles the efficiency compared to placing a single electrode sheet in the existing technology. Attached Figure Description
[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of the automatic stacking machine for battery production of the present invention; Figure 2 The image shown is a top view of the invention; Figure 3 The diagram shown is a three-dimensional structural illustration of the mounting plate and suction cup assembly of the present invention; Figure 4 The diagram shown is a three-dimensional structural schematic of the suction cup of the present invention; Figure 5 This is a three-dimensional structural diagram of the suction cup of the present invention from another perspective; Figure 6 The diagram shown is a three-dimensional structural schematic of the limiting plate of the present invention; Figure 7 The diagram shows two states of the limiting plate of the present invention.
[0018] The above-mentioned figures include the following reference numerals: 1-substrate, 2-stacking platform, 3-conveyor frame, 4-mounting plate, 5-material box, 6-suction cup, 61-suction nozzle, 7-moving drive component one, 8-connecting frame, 9-limiting plate one, 91-limiting surface, 92-air vent one, 93-sloping surface, 94-air vent two, 95-arc surface, 10-moving drive component two, 11-limiting plate two. Detailed Implementation
[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0020] Example 1: An automatic stacking machine for battery production, such as Figures 1-7 As shown, the system includes a substrate 1, a stacking stage 2, a conveyor frame 3, a mounting plate 4, and a suction cup 6. The stacking stage 2 is mounted on the moving end of the X-axis moving unit of the substrate 1. The conveyor frame 3 is mounted on the substrate 1. Several conveying rollers for conveying diaphragms are mounted on the conveyor frame 3. Two YZ-axis moving units are provided on the substrate 1. The two YZ-axis moving units are located on opposite sides of the X-axis moving unit. Two mounting plates 4 are provided, and the two mounting plates 4 are respectively mounted on the moving ends of the two YZ-axis moving units. Two mounting plates 4 are respectively distributed on both sides of the stacking stage 2; each mounting plate 4 is equipped with a suction cup 6, the suction cup 6 on one mounting plate 4 picks up the positive electrode sheet, and the suction cup 6 on the other mounting plate 4 picks up the negative electrode sheet; it also includes a moving drive component 7 and a limiting plate 9; the moving drive component 7 is installed on both sides of the suction cup 6, and the moving drive component 7 is an electric push rod or a cylinder; each moving drive component 7 is provided with a limiting plate 9 on its driving end, and the limiting plate 9 has an arc surface 95.
[0021] Each of the moving drive components 7 has a connecting frame 8 mounted on its drive end; two limiting plates 9 are rotatably mounted on the two connecting frames 8 respectively, and a motor is mounted on the connecting frame 8 to drive the corresponding limiting plate 9 to rotate. The opposite sides of the two limiting plates 9 are limiting surfaces 91; the bottom surface of the limiting plate 9 is an inclined surface 93; a plurality of material boxes 5 are mounted on the substrate 1; the internal width of the material box 5 is greater than the width of the electrode sheet.
[0022] The limiting surface 91 and the inclined surface 93 are connected by the arc surface 95.
[0023] The limiting plate 9 is a hollow structure and is connected to an external air pump. An air vent 92 is provided on the limiting surface 91.
[0024] An air vent 94 is provided on the inclined surface 93 of the limiting plate 9 on only one side.
[0025] The air blown out by the first air outlet 92 and the second air outlet 94 is ionized wind.
[0026] Both the first air vent 92 and the second air vent 94 are composed of multiple sub-air vents arranged in a straight line and spaced apart, which can prevent the electrode from entering the first air vent 92 and the second air vent 94.
[0027] Example 2: Based on Example 1, as follows Figures 1-7 As shown, a second moving drive component 10 is installed on each of the other two sides of the suction cup 6. The second moving drive component 10 is an electric push rod or a cylinder. A second limiting plate 11 is installed on the driving end of each second moving drive component 10. The longitudinal section of the second limiting plate 11 is the same as the longitudinal section structure of the first limiting plate 9.
[0028] The suction nozzles 61 of the suction cup 6 are distributed at the four corners. When the limiting plate 9 is rotated so that the inclined surface 93 faces directly upward, each of the inclined surfaces 93 can cover the two suction nozzles 61 on one side.
[0029] Two suction cups 6 are installed on the mounting plate 4, and the parts installed on the two suction cups 6 have the same structure. Two electrode sheets can be placed on the stacking stage 2 at a time.
[0030] In this invention, the moving structures of both the X-axis moving unit and the YZ-axis moving unit are composed of matching slide rails and electric sliders.
[0031] The basic stacking steps are as follows: Positive and negative electrode sheets are prepared in the material boxes 5 on both sides respectively. The diaphragm is conveyed to the conveyor rollers on the conveyor frame 3 via an external film feeding structure, allowing the first end of the diaphragm to reach the stacking table 2 via the conveyor frame 3 and be fixed on the stacking table 2. Figure 1As shown, the stacking table 2 is first moved to one side of the conveyor frame 3. At this time, the first layer of the diaphragm covers the stacking table 2. Then, the suction cup 6 on this side moves to the material box 5 to pick up the positive electrode sheet. Then, it moves to the top of the stacking table 2. The suction cup 6 is moved down and the picked-up positive electrode sheet is moved down and placed on the first layer of the diaphragm. Then, the stacking table 2 is moved to the other side of the conveyor frame 3. During the movement of the stacking table 2, the diaphragm at the conveyor frame 3 is pulled out and covers the placed positive electrode sheet to form the second layer of the diaphragm. Then, the suction cup 6 on this other side moves to the material box 5 to pick up the negative electrode sheet. Then, it moves to the top of the stacking table 2. Then, the suction cup 6 is moved down and the picked-up negative electrode sheet is moved down and placed on the second layer of the diaphragm. Then, the pressing structure of the stacking table 2 is used to press the second layer of the diaphragm. Then, the above process is repeated to complete the stacking operation. The pressing structure of the stacking stage 2 operates on the following principle: two sets of pressing plates are used, and the pressing plates can move freely along the YZ axis by the longitudinal drive of the lead screw and the vertical drive of the electric push rod. This allows the pressing plates to be longitudinally pulled out from between the two diaphragms and moved up to the diaphragm above where the electrode has been placed for pressing. The two sets of pressing plates are used alternately. That is, when one set of pressing plates presses and fixes the first diaphragm, the other set of pressing plates is used to press the second diaphragm, thus alternately pressing and fixing the diaphragms.
[0032] Since the stacking process of stacking stage 2 is common knowledge in the existing stacking machine usage, only the key sequence is described, and the specific details are not elaborated here.
[0033] The improvements of this invention are as follows (since the operating principles of the positive and negative electrodes are the same, they will be referred to as electrodes in the following description): Firstly, during the process of extracting electrode sheets from the material box 5: Considering that in existing stacking machines, the internal dimensions of the material box 5 are the same as the dimensions of the electrode sheets in order to limit their movement, and during the continuous removal of electrode sheets from the material box 5, the lifting cylinder (not shown in the figure) below the material box 5 continuously pushes the electrode sheet stack upwards for extraction. During this process, the edges of the electrode sheets continuously rub against the inner wall of the material box 5, resulting in wear on the edges of the electrode sheets; therefore, in this invention, the internal width of the material box 5 is set to be greater than the width of the electrode sheets, so that the electrode sheet stack is lowered by the material box 5. When the lifting cylinder moves upward, it will not rub against the inner wall of the material box 5. Furthermore, to correct and position the electrode, a limiting structure consisting of limiting plate 1 9 and limiting plate 2 11 is designed. Since the longitudinal section of limiting plate 2 11 is the same as that of limiting plate 1 9, it also has a limiting surface 91, an inclined surface 93, and an arc surface 95. Therefore, limiting plate 1 9 and limiting plate 2 11 have the same limiting function. When the suction cup 6 moves to the upper opening of the material box 5 to pick up the electrode, limiting plate 1 9 is rotated so that the inclined surface 93 faces directly downwards. Figure 4As shown, limiting plate 1 9 and limiting plate 2 11 form a U-shape around each other and cover the upper opening of the material box 5. Then, the lifting cylinder below the material box 5 is controlled to push the electrode stack upward, so that the uppermost electrode first passes through the inclined surface 93 and reaches the limiting surface 91 along the inclined surface 93. Thus, the electrode can be limited between multiple limiting surfaces 91 by using the guiding effect of the inclined surface 93, realizing the correction and positioning of the electrode. Then, the suction nozzle 61 of the suction cup 6 picks up and fixes the electrode that is limited to the designated position. This not only avoids the problem of the edge of the electrode continuously rubbing against the inner wall of the material box 5 over a long distance, but also uses the short inclined surface 93 to correct and position the electrode, without the need for an additional correction structure. Furthermore, the limiting surface 91 and the inclined surface 93 are designed to be connected by an arc surface 95, which facilitates the transfer of the electrode from the inclined surface 93 to the limiting surface 91 and avoids the edges from bumping. Furthermore, considering that the electrodes will attract each other due to static electricity and that dust may be present on their surfaces, two air vents, 92 and 94, were designed. The vertical width of air vent 94 is greater than that of air vent 92. The two limiting plates 9 are pre-connected to an external air pump. Ionizing air is then introduced into the limiting plate 9 with air vent 94 via the external air pump. The ionizing air is then blown out through air vents 92 and 94. When the electrodes pass over the inclined surface 93, the wider air vent 94 blows a large area of ionizing air onto the electrodes, ensuring a large area of static electricity removal and preventing the electrodes from attracting each other due to static electricity. The adsorbed electrode sheets are initially separated and can be initially dusted. Because the vertical width of the second air outlet 94 is large and the air force is not strong, the electrode sheets will not be blown and shaken. When the electrode sheets reach the limiting surface 91, since the electrode sheets are restricted by the limiting surface 91, the first air outlet 92 is designed to have a small vertical width so that the air force of the first air outlet 92 is strong, which can effectively blow away the dust on the surface of the electrode sheets. In addition, the external air pump draws air into the limiting plate 9 which does not have the second air outlet 94. That is, air is discharged from the first air outlet 92 on one side and drawn from the second air outlet 92 on the other side, so as to blow away and remove the dust with directional airflow.
[0034] Secondly, during the process of lowering the electrode sheet onto the diaphragm, the limiting plate 9 is pre-controlled to rotate so that the arc surface 95 faces downwards, as shown in the example. Figure 7As shown in the lower structure, the moving drive component 7 is controlled to move the limiting plate 9 upward, so that the lowest point of the arc surface 95 is just level with the bottom surface of the electrode adsorbed by the suction cup 6. The moving drive component 10 is controlled to move the limiting plate 11 upward above the electrode. Then the suction cup 6 is controlled to move downward. Since the limiting plate 9 is located outside the electrode, the arc surface 95 of the limiting plate 9 first contacts the inclined diaphragm. Thus, the arc surface 95 of the limiting plate 9 first presses down on the diaphragm, and the electrode does not contact the inclined diaphragm. When the diaphragm is gradually pressed down to a horizontal state by the arc surface 95 of the limiting plate 9, the electrode will contact and be placed on the diaphragm. This prevents the electrode and the diaphragm from squeezing each other, and the downward pressure of the arc surface 95 on the diaphragm is less likely to damage the diaphragm.
[0035] Thirdly, in this invention, two suction cups 6 are installed on the mounting plate 4 (the parts installed on the two suction cups 6 operate on the same principle), and two electrode sheets can be placed on the stacking stage 2 at a time. Therefore, two electrode sheets can be placed between the two diaphragms at a time, which doubles the efficiency compared to placing a single electrode sheet in the prior art.
[0036] Fourth, when not performing stacking operations, control the limit plate 9 to rotate so that the inclined surface 93 faces directly upwards, and let the moving drive component 7 control the height of the limit plate 9 so that the inclined surface 93 of the limit plate 9 can cover the bottom surface of the suction nozzle 61 (and the position of the inclined surface 93 covering the suction nozzle 61 is offset from the air outlet 94), such as Figure 7 As shown in the upper structure, it achieves dust prevention on the inner wall of the nozzle 61, and avoids the nozzle 61's suction capacity being weakened due to dust adhering to the inner wall.
[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An automatic stacking machine for battery production, comprising a substrate (1), a stacking table (2), a conveyor frame (3), a mounting plate (4), and a suction cup (6); the stacking table (2) is mounted on the substrate (1); the conveyor frame (3) for conveying separators to the stacking table (2) is mounted on the substrate (1); two mounting plates (4) are movably disposed on the substrate (1); the two mounting plates (4) are respectively distributed on both sides of the stacking table (2); each mounting plate (4) is respectively mounted with a suction cup (6) for picking up electrode sheets; characterized in that, It also includes a moving drive component 1 (7) and a limiting plate 1 (9); the moving drive component 1 (7) is installed on both sides of the suction cup (6); each moving drive component 1 (7) is provided with a limiting plate 1 (9) on its driving end, the limiting plate 1 (9) has an arc surface (95), and the limiting plate 1 (9) flattens the diaphragm through the arc surface (95); Each of the moving drive components (7) is equipped with a connecting frame (8) at its drive end; two limiting plates (9) are rotatably mounted on the two connecting frames (8), and the opposite sides of the two limiting plates (9) are limiting surfaces (91); the bottom surface of the limiting plate (9) is an inclined surface (93); a plurality of material boxes (5) for placing electrode sheets are mounted on the substrate (1); the internal width dimension of the material box (5) is greater than the width dimension of the electrode sheet.
2. The automatic stacking machine for battery production according to claim 1, characterized in that, The limiting surface (91) and the inclined surface (93) are connected by the arc surface (95).
3. The automatic stacking machine for battery production according to claim 1, characterized in that, The limiting plate (9) is a hollow structure, and the limiting surface (91) is provided with a vent (92) for ventilation.
4. An automatic stacking machine for battery production according to claim 3, characterized in that, An air outlet 2 (94) for air outlet is provided on the inclined surface (93) of the limiting plate 1 (9) on only one side.
5. An automatic stacking machine for battery production according to claim 4, characterized in that, The wind blown out by the first air outlet (92) and the second air outlet (94) is ion wind.
6. An automatic stacking machine for battery production according to claim 4, characterized in that, Both the first air vent (92) and the second air vent (94) are composed of multiple intermittently distributed sub-air vents.
7. An automatic stacking machine for battery production according to claim 1, characterized in that, A second moving drive component (10) is installed on each of the other two sides of the suction cup (6); a second limiting plate (11) for limiting the two sides of the electrode is installed on the driving end of each second moving drive component (10); the longitudinal section of the second limiting plate (11) is the same as the longitudinal section structure of the first limiting plate (9).
8. An automatic stacking machine for battery production according to claim 1, characterized in that, The suction nozzles (61) of the suction cup (6) are distributed at the four corners. When the limiting plate (9) is rotated to the point where the inclined surface (93) faces directly upward, each of the inclined surfaces (93) can cover the two suction nozzles (61) on one side.
9. An automatic stacking machine for battery production according to any one of claims 1-8, characterized in that, Two suction cups (6) are installed on the mounting plate (4), and the parts installed on the two suction cups (6) have the same structure. Two electrode sheets can be placed on the stacking stage (2) at a time.