Battery cell stacking equipment for lithium battery production

Abstract

The utility model relates to battery cell stacking equipment for lithium battery production, which comprises a stacking frame body and a squeezer main body, a plurality of variable pitch openings are arranged on both sides of the top surface of the stacking frame body, the squeezer main body is positioned at the center of the outer side of each of the two ends of the stacking frame body, and the variable pitch openings are arranged on the outer side of the stacking frame body before stacking and squeezing the battery cells through the stacking frame body and the squeezer main body. Under the action of the mechanical arm, the same row of battery cells are divided into two groups, the positive and negative electrodes of the battery cells on the two sides are located on the crossing device, then the two groups of battery cells are placed above the bearing plates on the two sides respectively, the bearing plates on the two sides get close to each other, and the battery cells are guided and separated by the variable-pitch opening and the crossing opening in the process that the bearing plates on the two sides get close to each other. When the battery cells reach the limit, the battery cells on the two sides are in the same row and the positive electrodes and the negative electrodes of the battery cells are mutually crossed, then the battery cells on the bearing plate are stacked and extruded by the extruder main body, and the process of sequentially stacking the electrodes after the directions of the electrodes are turned one by one is replaced by a manner of synchronously crossing the positive electrodes and the negative electrodes of the battery cells in groups, so that the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, specifically to a cell stacking device for lithium battery production. Background Technology

[0002] A lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Lithium batteries rely on the movement of lithium ions between the positive and negative electrodes to function. During charging and discharging, lithium ions move back and forth between the two electrodes, inserting and de-intercalating. During charging, lithium ions are de-intercalated from the positive electrode and intercalated into the negative electrode via the electrolyte, while the reverse occurs during discharging. Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. The lithium battery cell is the core component of a lithium battery, determining its performance and quality. The lithium battery production process requires stacking equipment to stack the individual cells.

[0003] In the existing technology, during the cell stacking process, the positive and negative terminals of each cell need to be crossed in order to facilitate wiring. However, after the cells leave the factory, their positive and negative terminals are usually on the same side. Therefore, before stacking the cells, a number of cells need to be rotated and then stacked one by one, which results in low production efficiency.

[0004] Therefore, a cell stacking device for lithium battery production is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a cell stacking device for lithium battery production. Before stacking and pressing the cells using a stacking frame and an extruder body, the cells in the same row are divided into two groups by a robotic arm, with the positive and negative electrodes of the cells on both sides in a cross-connected configuration. Then, the two groups of cells are placed on the support plates on both sides, and the support plates move closer together. During this process, the support plates are guided and separated by a variable-pitch opening and a cross-connection opening. When the support plates reach their limit, the cells on both sides are in the same row with their positive and negative electrodes crossed. Then, the extruder body stacks and presses the cells on the support plates. This method of grouping and synchronously crossing the positive and negative electrodes of the cells replaces the process of stacking them one by one after changing the direction of the electrodes, thus improving production efficiency.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a cell stacking device for lithium battery production, including a stacking frame and an extruder body. Multiple variable-pitch openings are provided on both sides of the top surface of the stacking frame. The extruder body is located at the center of the outer sides of both ends of the stacking frame. The variable-pitch openings are close to each other at the ends of the stacking frame, and the other ends of the variable-pitch openings are far apart from each other. Multiple intersecting openings are provided parallel to each other on the top surface of the stacking frame. The intersecting openings are parallel to the extrusion surface of the extruder body. One end of the multiple intersecting openings is collinear. The other end of the multiple intersecting openings smoothly transitions to the variable-pitch openings on both sides. A shaft slider is installed inside the variable-pitch openings on both sides. A support plate is fixedly connected to the top of the shaft slider.

[0007] A first double-hole slider is fixedly connected to the bottom surface of one side of the shaft slider, and a first double-axis guide rod is installed through the inner walls of the through holes of the multiple first double-hole sliders; a first sleeve is fixedly connected to one end of the first double-axis guide rod, and a first threaded cylinder is fixedly connected to the other end of the first double-axis guide rod.

[0008] Another shaft slider has an extended guide post fixedly connected to its bottom surface. A second double-hole slider is fixedly connected to the bottom surface of one end of the extended guide post. A second double-axis guide rod slides through the inner walls of the through holes of the multiple second double-hole sliders. A second sleeve is fixedly connected to one end of the second double-axis guide rod, and a second threaded cylinder is fixedly connected to the other end of the second double-axis guide rod.

[0009] Preferably, a limiting guide rod is installed parallel to the inner wall of the first sleeve and the second sleeve, and both ends of the two limiting guide rods are vertically fixed to the bottom surface of the stacking frame through a bracket.

[0010] Preferably, the first and second threaded cylinders are threaded with control screws, and both ends of the two control screws are fixed to screw brackets by bearings. The top of the screw brackets is perpendicularly fixed to the bottom surface of the stacking frame.

[0011] Preferably, two motors are mounted on the side wall of one of the lead screw supports, and the output shafts of the two motors are respectively connected to the shafts of the two control lead screws.

[0012] The beneficial effects of this utility model are:

[0013] Before the cells are stacked and extruded by the stacking frame and the extruder body, the cells in the same row are divided into two groups by the action of the robotic arm, and the positive and negative electrodes of the cells on both sides are in a cross-connected state. Then, the two groups of cells are placed on the support plates on both sides respectively. Then, the support plates on both sides move closer to each other. During the process of the support plates moving closer to each other, they are guided and separated by the variable pitch opening and the cross opening. When they reach the limit, the cells on both sides are in the same row and the positive and negative electrodes are in a cross-connected state. Then, the extruder body stacks and extrudes the cells on the support plates. The process of grouping and synchronously crossing the positive and negative electrodes of the cells replaces the process of stacking them one by one after changing the direction of the electrodes, thereby improving production efficiency. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the stacking frame structure in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the control screw of this utility model;

[0018] Figure 4 This is a schematic diagram of the extended guide post in this utility model.

[0019] Legend:

[0020] 1. Stacking frame; 2. Extruder body; 11. Variable pitch opening; 12. Cross opening; 3. Shaft slider; 31. Support plate; 32. First double-hole slider; 33. Extension guide post; 34. Second double-hole slider; 4. First double-axis guide rod; 41. First sleeve; 42. First threaded cylinder; 5. Second double-axis guide rod; 51. Second sleeve; 52. Second threaded cylinder; 6. Limiting guide rod; 7. Control screw; 71. Screw support; 8. Motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Specific implementation examples are given below.

[0023] Please see Figure 1 - Figure 4 This utility model provides a cell stacking device for lithium battery production, including a stacking frame 1 and an extruder body 2. Multiple variable-pitch openings 11 are provided on both sides of the top surface of the stacking frame 1. The extruder body 2 is located at the center of the outer sides of both ends of the stacking frame 1. The variable-pitch openings 11 are close to each other at the ends of the stacking frame 1, and their other ends are far apart. Multiple intersecting openings 12 are parallel to each other on the top surface of the stacking frame 1. The intersecting openings 12 are parallel to the extrusion surface of the extruder body 2. One end of each intersecting opening 12 is collinear, and the other end of each intersecting opening 12 smoothly transitions to the variable-pitch openings 11 on both sides. A shaft slider 3 is fitted inside each of the variable-pitch openings 11, and a bearing is fixedly connected to the top of the shaft slider 3. Before the battery cells are stacked and compressed by the stacking frame 1 and the extruder body 2, the pallet 31 divides the battery cells in the same row into two groups under the action of the robotic arm, and the positive and negative electrodes of the battery cells on both sides are in a cross-connected state. Then, the two groups of battery cells are placed on the support plates 31 on both sides respectively. The support plates 31 are fixed on the top of the shaft slider 3. The shaft slider 3 is installed between the variable pitch opening 11 and the cross opening 12. When the support plates 31 on both sides approach each other, the battery cells on them are separated synchronously with the support plates 31 until they move to the position of the cross opening 12 and the battery cells on both sides cross each other. When they move to the intersection of the cross opening 12, the battery cells are in a state of cross-connected positive and negative electrodes and separated from each other, which replaces the process of stacking the electrodes one by one after turning their directions.

[0024] like Figure 3 and Figure 4 As shown, a first double-hole slider 32 is fixedly connected to the bottom surface of one side shaft slider 3. A first double-axis guide rod 4 is installed through the inner walls of the through holes of multiple first double-hole sliders 32. A first sleeve 41 is fixedly connected to one end of the first double-axis guide rod 4, and a first threaded cylinder 42 is fixedly connected to the other end of the first double-axis guide rod 4. The shaft slider 3 on the same side can move synchronously radially under the guidance of the first double-axis guide rod 4 in the first double-hole slider 32. During this process, they move closer or further away from each other. The first sleeve 41 and the first threaded cylinder 42 are the positioning linkage end and displacement linkage end of the first double-axis guide rod 4.

[0025] like Figure 3 and Figure 4As shown, an extension guide post 33 is fixedly connected to the bottom surface of another shaft slider 3. A second double-hole slider 34 is fixedly connected to the bottom surface of one end of the extension guide post 33. A second double-axis guide rod 5 slides through the inner walls of the through holes of multiple second double-hole sliders 34. A second sleeve 51 is fixedly connected to one end of the second double-axis guide rod 5, and a second threaded cylinder 52 is fixedly connected to the other end of the second double-axis guide rod. The shaft slider 3 on the other side is installed on the second double-hole slider 34 through the extension guide post 33. The second double-hole slider 34 and the first double-hole slider 32 are in a non-coplanar state. The shaft slider 3 on this side will not obstruct each other during the process of moving with the second double-axis guide rod 5, the second sleeve 51 and the second threaded cylinder 52 to the position of the first double-axis guide rod 4, thereby increasing the rationality of the device structure.

[0026] like Figure 3 and Figure 4 As shown, a limiting guide rod 6 is installed parallel to the inner wall of the first sleeve 41 and the second sleeve 51. Both ends of the two limiting guide rods 6 are vertically fixed to the bottom surface of the stacking frame 1 through a bracket. The first sleeve 41 and the second sleeve 51 are synchronously limited under the action of the limiting guide rod 6. At this time, the relative position of one end of the first dual-axis guide rod 4 and the second dual-axis guide rod 5 is limited, and the first dual-axis guide rod 4 and the second dual-axis guide rod 5 can make relative displacements without affecting each other under the restriction of the limiting guide rod 6.

[0027] like Figure 3 and Figure 4 As shown, control screws 7 are installed on the internal threads of the first threaded cylinder 42 and the second threaded cylinder 52. Both ends of the two control screws 7 are fixed to screw brackets 71 through bearings. The top of the screw brackets 71 is fixed perpendicularly to the bottom surface of the stacking frame 1. Two motors 8 are installed on the side wall of one of the screw brackets 71. The output shafts of the two motors 8 are respectively connected to the shafts of the two control screws 7. The other ends of the first dual-axis guide rod 4 and the second dual-axis guide rod 5 are respectively linked to the two control screws 7 through the first threaded cylinder 42 and the second threaded cylinder 52. The two control screws 7 are installed in parallel with the screw brackets 71. The two motors 8 can provide opposite and independent output forces to the two control screws 7, controlling the sliders 3 on both sides to move closer or further apart.

[0028] The working principle of this utility model:

[0029] Before the battery cells are stacked and extruded by the stacking frame 1 and the extruder body 2, the battery cells in the same row are divided into two groups under the action of the robotic arm, and the positive and negative electrodes of the battery cells on both sides are in a cross-connected device. Then, the two groups of battery cells are placed on the support plates 31 on both sides respectively. The support plates 31 are fixed on the top of the shaft slider 3. The shaft slider 3 is installed between the variable pitch opening 11 and the cross opening 12. When the support plates 31 on both sides approach each other, the battery cells on them are separated synchronously with the support plates 31 until they move to the position of the cross opening 12 and the battery cells on both sides cross each other. When they move to the intersection of the cross opening 12, the battery cells are in a state of cross-connected positive and negative electrodes and separated from each other, which replaces the process of stacking the electrodes one by one after turning their directions.

[0030] The slider 3 on the same side of the shaft can move synchronously radially under the guidance of the first dual-axis guide rod 4 within the first dual-hole slider 32. During this process, they move closer or further apart. The first sleeve 41 and the first threaded cylinder 42 are the positioning linkage end and displacement linkage end of the first dual-axis guide rod 4. The slider 3 on the other side of the shaft is installed on the second dual-hole slider 34 through the extended guide post 33. The second dual-hole slider 34 and the first dual-hole slider 32 are in a non-coplanar state. The slider 3 on this side of the shaft will not obstruct each other during its movement towards the position of the first dual-axis guide rod 4, following the second dual-axis guide rod 5, the second sleeve 51, and the second threaded cylinder 52. The first sleeve 41 and the second sleeve 52... 1. Under the action of the limiting guide rod 6, the relative positions of one end of the first dual-axis guide rod 4 and the second dual-axis guide rod 5 are limited. At this time, the first dual-axis guide rod 4 and the second dual-axis guide rod 5 can perform relative displacements without affecting each other under the restriction of the limiting guide rod 6. The other ends of the first dual-axis guide rod 4 and the second dual-axis guide rod 5 are respectively linked to the two control screws 7 through the first threaded cylinder 42 and the second threaded cylinder 52. The two control screws 7 are installed in parallel with the screw bracket 71. The two motors 8 can provide opposite and independent output forces to the two control screws 7 respectively, controlling the sliders 3 on both sides to move closer or further away from each other.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cell stacking device for lithium battery production, characterized in that: The device includes a stacking frame (1) and an extruder body (2). The stacking frame (1) has multiple variable-pitch openings (11) on both sides of its top surface. The extruder body (2) is located at the center of the outer sides of both ends of the stacking frame (1). One end of each variable-pitch opening (11) is close to the end of the stacking frame (1) and the other end is far away from each other. The top surface of the stacking frame (1) has multiple cross openings (12) parallel to each other. The cross openings (12) are parallel to the extrusion surface of the extruder body (2). One end of each cross opening (12) is collinear. The other end of each cross opening (12) smoothly transitions to the variable-pitch openings (11) on both sides. A shaft slider (3) is installed inside each of the variable-pitch openings (11) on both sides. A support plate (31) is fixed to the top of the shaft slider (3). A first double-hole slider (32) is fixedly connected to the bottom surface of one of the shaft sliders (3), and a first double-axis guide rod (4) is installed through the inner walls of the through holes of the multiple first double-hole sliders (32); a first sleeve (41) is fixedly connected to one end of the first double-axis guide rod (4), and a first threaded cylinder (42) is fixedly connected to the other end of the first double-axis guide rod (4). Another shaft slider (3) has an extension guide post (33) fixedly connected to its bottom surface. A second double-hole slider (34) is fixedly connected to the bottom surface of one end of the extension guide post (33). A second double-axis guide rod (5) slides through the inner walls of the through holes of the multiple second double-hole sliders (34). A second sleeve (51) is fixedly connected to one end of the second double-axis guide rod (5), and a second threaded cylinder (52) is fixedly connected to the other end of the second double-axis guide rod.

2. The cell stacking equipment for lithium battery production according to claim 1, characterized in that: Limiting guide rods (6) are installed parallel to each other between the inner walls of the first sleeve (41) and the second sleeve (51), and the two ends of the two limiting guide rods (6) are vertically fixed to the bottom surface of the stacking frame (1) through brackets.

3. The cell stacking equipment for lithium battery production according to claim 1, characterized in that: The first threaded cylinder (42) and the second threaded cylinder (52) are threaded with control screws (7). Both ends of the two control screws (7) are fixed to screw brackets (71) by bearings. The top of the screw brackets (71) is fixed perpendicularly to the bottom surface of the stacking frame (1).

4. A cell stacking device for lithium battery production according to claim 3, characterized in that: Two motors (8) are mounted on the side wall of one of the lead screw supports (71), and the output shafts of the two motors (8) are respectively connected to the shafts of the two control lead screws (7).

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