Cell lamination device

Abstract

The utility model relates to the technical field of battery cell lamination, in particular to a battery cell lamination device, which comprises a negative plate feeding mechanism, an etching mechanism, a diaphragm mechanism, a first positive plate mechanism, a second positive plate mechanism and a lamination mechanism, the coating on the surface of the pole piece is corroded, the problem of open circuit caused by powder falling of the pole piece is solved, the folding grooves which are oppositely arranged are formed in the front face and the back face of the pole piece through laser etching, the folding grooves are convenient for the lamination mechanism to stack the pole piece to improve the lamination efficiency, the lamination mechanism folds the composite pole piece to form a core, the lamination efficiency is improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core stacking, in particular to a battery core stacking device. Background Art

[0002] With the country's vigorous promotion of new energy, the demand for lithium-ion batteries in various industries is growing. The battery cell is the core component of the lithium-ion battery. The battery cell is generally composed of positive and negative electrodes stacked on top of each other, and the positive and negative electrodes are isolated and insulated by a diaphragm.

[0003] At present, there are two main methods for making battery cells: strip lamination and single-piece lamination. Before lamination, the diaphragm is cut into a single-piece structure. During the cutting process, powder will fall off, which will cause the battery cell to have a short circuit problem. After the positive and negative electrodes are stacked, the single-piece diaphragm is stacked on the positive electrode or the negative electrode to achieve lamination. This process is complicated, and during the lamination process, the position of the diaphragm must be kept corresponding to the positive electrode and the negative electrode. The lamination accuracy and efficiency are difficult to guarantee. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a battery core stacking device, which solves the problem that the existing stacking will lose powder during the cutting process, thereby causing the battery core to break, and the problem that it is difficult to ensure accuracy.

[0005] The technical scheme adopted by the utility model is: a negative electrode sheet discharging mechanism, the negative electrode sheet discharging mechanism is used for discharging negative electrode sheets, the negative electrode sheets include a first surface and a second surface; an etching mechanism, the etching mechanism includes a first etching component and a second etching component, the first etching component performs laser etching on the first surface to form a first folding groove, the second etching component performs laser etching on the second surface to form a second folding groove, the first folding groove and the second folding groove are arranged opposite to each other to separate the negative electrode sheets into a negative electrode sheet group; a diaphragm mechanism, the diaphragm mechanism includes a first diaphragm discharging component, a second diaphragm discharging component and a diaphragm composite component, the first diaphragm discharging component and the second diaphragm discharging component are used for discharging the diaphragms on the first surface and the second surface respectively, and the diaphragms are composited on the first surface and the second surface through the diaphragm composite component; a first positive electrode sheet mechanism, the first positive electrode sheet mechanism includes a first discharging component, a first feeding component, a first cutting component and a first electrode sheet composite component , the first discharge assembly is used for the first positive electrode sheet mechanism to discharge, the first feeding assembly is used to transport one end of the first positive electrode sheet mechanism to the first cutting assembly for cutting, and the first electrode sheet composite assembly is used to hot-press and composite the first positive electrode sheet mechanism with the first surface of the negative electrode sheet mechanism; the second positive electrode sheet mechanism, the second positive electrode sheet mechanism includes a second discharge assembly, a second feeding assembly, a second cutting assembly and a second electrode sheet composite assembly, the second discharge assembly is used for the second positive electrode sheet mechanism to discharge, the second feeding assembly is used to transport one end of the second positive electrode sheet mechanism to the second cutting assembly for cutting, and the second electrode sheet composite assembly is used to hot-press and composite the second positive electrode sheet mechanism with the second surface of the negative electrode sheet mechanism; the first surface of the negative electrode sheet and the first positive electrode sheet mechanism are hot-pressed through the first electrode sheet composite assembly to form a first composite electrode sheet; the second surface of the negative electrode sheet and the second positive electrode sheet mechanism are hot-pressed through the second electrode sheet composite assembly to form a second composite electrode sheet.

[0006] A further improvement to the above solution is that a stacking mechanism is provided on one side of the second positive electrode sheet mechanism, the stacking mechanism includes a stacking box and a stacking positioning plate, and the stacking positioning plate is arranged on the outside of the stacking box.

[0007] A further improvement to the above scheme is that the stacking box staggers and folds the first composite pole piece and the second composite pole piece to form a stack, and the stacking positioning plate presses and positions the stack to form a battery core.

[0008] A further improvement to the above scheme is that the negative electrode sheet unwinding mechanism includes a electrode sheet unwinding roller and a electrode sheet unwinding motor for driving the electrode sheet unwinding roller, and the electrode sheet unwinding motor is used to drive the electrode sheet unwinding roller to drive the negative electrode sheet to be unwound.

[0009] A further improvement to the above scheme is that the first diaphragm unwinding assembly includes a first diaphragm unwinding roller and a first diaphragm guide roller, the first diaphragm unwinding roller is used to unwind the first diaphragm onto the diaphragm guide roller, and the first diaphragm guide roller is used to guide the first diaphragm toward the first surface of the negative electrode sheet.

[0010] A further improvement to the above scheme is that the second diaphragm unwinding assembly includes a second diaphragm unwinding roller and a second diaphragm guide roller, the second diaphragm unwinding roller is used to unwind the second diaphragm onto the diaphragm guide roller, and the second diaphragm guide roller is used to guide the second diaphragm toward the second side of the negative electrode sheet.

[0011] A further improvement to the above scheme is that the first unwinding assembly includes a first unwinding roller and a first unwinding motor for driving the first unwinding roller, and the first unwinding motor is used to drive the first unwinding roller to drive the first positive electrode sheet mechanism to unwind.

[0012] A further improvement to the above scheme is that the second unwinding assembly includes a second unwinding roller and a second unwinding motor for driving the second unwinding roller, and the second unwinding motor is used to drive the second unwinding roller to drive the second positive electrode sheet mechanism to unwind.

[0013] A further improvement to the above scheme is that the first feeding assembly is used to feed one end of the cut first positive electrode sheet structure from bottom to top into the first electrode sheet composite assembly for hot pressing.

[0014] A further improvement to the above solution is that the second feeding assembly is used to feed one end of the cut second positive electrode sheet structure from top to bottom into the second composite assembly for hot pressing.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the existing stacking, the battery cell is formed by staggered stacking of negative electrode sheets and positive electrode sheets, and the coating on the surface of the negative electrode sheet is corroded by laser etching through the first and second surfaces of the negative electrode, so as to solve the problem that the existing electrode sheet will lose powder due to cutting and cause short circuit, and the laser etching forms a symmetrical first folding groove and a second folding groove on both sides of the negative electrode sheet, and the folding groove facilitates the stacking of the electrode sheets by the stacking mechanism to improve the stacking efficiency, and after the folding groove is formed, the positive and negative sides of the electrode sheet are hot-pressed and composited with the diaphragm mechanism, and the composite assembly is convenient to form with the positive electrode sheet Composite electrode sheets, and the positive electrode sheets are transported from the discharge component to the cutting component for cutting, and after cutting, they are transported to the composite component from different directions from top to bottom and from bottom to top by the feeding component and composited and hot-pressed with the negative electrode sheets to form staggered composite electrode sheets, and finally the composite components are staggered and stacked by the stacking mechanism to form a battery cell by folding in half, and the stacking mechanism is provided with a stacking box and a stacking positioning sheet, so that the stacking accuracy is improved during the stacking process, and two or more stacking boxes are provided to improve the stacking efficiency, the practicability is strong, and there is a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the battery core stacking device of the utility model;

[0018] Figure 2 It is a schematic diagram of the lamination process of the battery core lamination device of the utility model;

[0019] Figure 3 It is a schematic diagram of a battery cell of the battery cell stacking device of the utility model.

[0020] Description of reference numerals: negative electrode sheet 1, first surface 11, second surface 12;

[0021] Etching mechanism 2, first etching assembly 21, second etching assembly 22, first folding groove 23, second folding groove 24;

[0022] Diaphragm mechanism 3, first diaphragm discharge assembly 31, second diaphragm discharge assembly 32, diaphragm composite assembly 34;

[0023] A first positive electrode sheet mechanism 4, a first discharge assembly 41, a first feeding assembly 42, a first cutting assembly 43, a first electrode sheet composite assembly 44, and a first composite electrode sheet 45;

[0024] A second positive electrode sheet mechanism 5, a second discharge assembly 51, a second feeding assembly 52, a second cutting assembly 53, a second electrode sheet composite assembly 54, and a second composite electrode sheet 55;

[0025] The stacking mechanism 6 , the stacking box 61 , and the stacking positioning plate 62 . DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] like Figure 1 to Figure 3As shown, in one embodiment of the utility model, a battery cell stacking device includes a negative electrode sheet 1 discharge mechanism, the negative electrode sheet 1 discharge mechanism is used for discharging the negative electrode sheet 1, the negative electrode sheet 1 includes a first surface 11 and a second surface 12; an etching mechanism 2, the etching mechanism 2 includes a first etching component 21 and a second etching component 22, the first etching component 21 performs laser etching on the first surface 11 to form a first folded groove 23, the second etching component 22 performs laser etching on the second surface 12 to form a second folded groove 24, the first folded groove 23 and the second folded groove 24 The negative electrode sheet 1 is arranged relatively to separate the negative electrode sheet 1 to form a negative electrode sheet 1 group; the diaphragm mechanism 3, the diaphragm mechanism 3 includes a first diaphragm discharge component 31, a second diaphragm discharge component 32 and a diaphragm composite component 34, the first diaphragm discharge component 31 and the second diaphragm discharge component 32 are used to discharge the diaphragms on the first surface 11 and the second surface 12 respectively, and the diaphragms are composited on the first surface 11 and the second surface 12 through the diaphragm composite component 34; the first positive electrode sheet mechanism 4, the first positive electrode sheet mechanism 4 includes a first discharge component 41, a first feeding component 42, a first cutting component 43 and The first electrode sheet composite component 44, the first discharge component 41 is used for the first positive electrode sheet mechanism 4 to discharge, the first feeding component 42 is used to convey one end of the first positive electrode sheet mechanism 4 to the first cutting component 43 for cutting, the first electrode sheet composite component 44 is used to hot press the first positive electrode sheet mechanism 4 and the first surface 11 of the negative electrode sheet 1 mechanism; the second positive electrode sheet mechanism 5, the second positive electrode sheet mechanism 5 includes a second discharge component 51, a second feeding component 52, a second cutting component 53 and a second electrode sheet composite component 54, the second discharge component 51 is used The material is discharged from the second positive electrode sheet mechanism 5, the second feeding assembly 52 is used to convey one end of the second positive electrode sheet mechanism 5 to the second cutting assembly 53 for cutting, and the second electrode sheet composite assembly 54 is used to hot-press and composite the second positive electrode sheet mechanism 5 with the second side 12 of the negative electrode sheet 1; the first side 11 of the negative electrode sheet 1 and the first positive electrode sheet mechanism 4 are hot-pressed through the first electrode sheet composite assembly 44 to form a first composite electrode sheet 45; the second side 12 of the negative electrode sheet 1 and the second positive electrode sheet mechanism 5 are hot-pressed through the second electrode sheet composite assembly 54 to form a second composite electrode sheet 55.

[0030] like Figure 1 As shown, a stacking mechanism 6 is provided on one side of the second positive electrode sheet mechanism 5, and the stacking mechanism 6 includes a stacking box 61 and a stacking positioning plate 62, and the stacking positioning plate 62 is arranged on the outside of the stacking box 61. In this embodiment, the stacking mechanism 6 is provided on one side of the second positive electrode sheet mechanism 5 to facilitate stacking of the first composite electrode sheet 45 and the second composite electrode sheet 55, thereby realizing an integrated automated battery cell stacking device and improving work efficiency.

[0031] The stacking box 61 staggeredly folds the first composite pole sheet 45 and the second composite pole sheet 55 to form a stack, and the stacking positioning plate 62 presses and positions the stack to form a battery cell. In this embodiment, the stacking box 61 is used to fold the composite pole sheets to form a battery cell, and the composite pole sheets are provided with symmetrical folding grooves to facilitate stacking by the stacking box 61 to speed up the stacking efficiency, and a stacking positioning plate is provided on the outer side of the stacking box 61, and the stacking accuracy is improved by the stacking positioning plate 62.

[0032] In the above embodiments, the stacking mechanism 6 may be designed with two or more stacking boxes 61, and the two or more stacking boxes 61 may work alternately to achieve continuous stacking and improve the stacking efficiency.

[0033] The unwinding mechanism of the negative electrode sheet 1 includes a electrode sheet unwinding roller and a electrode sheet unwinding motor for driving the electrode sheet unwinding roller, wherein the electrode sheet unwinding motor is used to drive the electrode sheet unwinding roller to drive the negative electrode sheet 1 to be unwound. In the present embodiment, a electrode sheet unwinding roller and a electrode sheet unwinding motor are provided, and the electrode sheet unwinding roller is used to unwind the negative electrode sheet 1. During the unwinding process, the negative electrode sheet 1 is unwound by the electrode sheet unwinding roller and the electrode sheet unwinding roller has a guiding effect on the negative electrode sheet 1, thereby ensuring the stability and flatness of the transportation and unwinding of the negative electrode sheet 1, and ensuring the accuracy of the subsequent laser etching of the negative electrode sheet 1 by the etching mechanism 2.

[0034] The first diaphragm unwinding assembly 31 includes a first diaphragm unwinding roller and a first diaphragm guiding roller. The first diaphragm unwinding roller is used to unwind the first diaphragm onto the diaphragm guiding roller. The first diaphragm guiding roller is used to guide the first diaphragm toward the first surface 11 of the negative electrode sheet 1. In this embodiment, the first diaphragm unwinding roller and the first diaphragm guiding roller are used to guide and place the first diaphragm to ensure that the first diaphragm is pressed against the first surface 11 of the negative electrode sheet 1, thereby improving the pressing accuracy of the first diaphragm.

[0035] The second diaphragm unwinding assembly 32 includes a second diaphragm unwinding roller and a second diaphragm guiding roller. The second diaphragm unwinding roller is used to unwind the second diaphragm onto the diaphragm guiding roller. The second diaphragm guiding roller is used to guide the second diaphragm toward the second side 12 of the negative electrode sheet 1. In this embodiment, the second diaphragm unwinding roller and the second diaphragm guiding roller are used to guide and place the second diaphragm, thereby ensuring that the second diaphragm is pressed against the second side 12 of the negative electrode sheet 1, thereby improving the pressing accuracy of the second diaphragm. The first diaphragm unwinding assembly 31 and the second diaphragm unwinding assembly 32 ensure the pressing accuracy of the diaphragm against the negative electrode sheet 1, thereby improving the practicality and service life of the electrode sheet.

[0036] The first unwinding assembly 41 includes a first unwinding roller and a first unwinding motor for driving the first unwinding roller, wherein the first unwinding motor is used to drive the first unwinding roller to drive the first positive electrode sheet mechanism 4 to unwind. In this embodiment, the first unwinding roller is used to place the first positive electrode sheet mechanism 4, and the first unwinding motor drives and guides the first unwinding roller to facilitate driving the first positive electrode sheet mechanism 4 toward the cutting mechanism for unwinding, thereby improving the accuracy of the cutting mechanism, and further facilitating hot pressing with the first side 11 of the negative electrode sheet 1 to form the first composite electrode sheet 45.

[0037] The second unwinding assembly 51 includes a second unwinding roller and a second unwinding motor for driving the second unwinding roller, wherein the second unwinding motor is used to drive the second unwinding roller to drive the second positive electrode sheet mechanism 5 to unwind. In this embodiment, the second unwinding roller is used to place the second positive electrode sheet mechanism 5, and the second unwinding motor drives and guides the second unwinding roller to facilitate driving the second positive electrode sheet mechanism 5 toward the cutting mechanism for unwinding, thereby improving the accuracy of the cutting mechanism, and then hot pressing is performed with the second side 12 of the negative electrode sheet 1 to form a second composite electrode sheet 55.

[0038] The first feeding assembly 42 is used to feed one end of the cut first positive electrode sheet mechanism 4 from bottom to top into the first electrode sheet composite assembly 44 for hot pressing. In this embodiment, the first feeding assembly 42 is used to hot-press the first positive electrode sheet mechanism 4 and the first side 11 of the negative electrode sheet 1 from top to bottom through the first composite assembly to form a first composite electrode sheet 45, and the second feeding assembly 52 is used to hot-press the second positive electrode sheet mechanism 5 and the second side 12 of the negative electrode sheet 1 from bottom to top through the second composite assembly to form a second composite electrode sheet 55. The positive electrode sheet mechanism and the negative electrode sheet 1 are hot pressed through the composite assembly by feeding assemblies in different directions, thereby forming an interlaced stacked and hot-pressed battery cell. The interlaced stacking improves the internal smoothness of the battery cell, thereby ensuring the practicality and service life of the battery cell.

[0039] The battery cell stacking device of the utility model forms a battery cell by staggered stacking of negative electrode sheets 1 and positive electrode sheets, and performs laser etching on the first surface 11 and the second surface 12 of the negative electrode to corrode the coating on the surface of the negative electrode sheet 1, thereby solving the problem that the existing electrode sheet is short-circuited due to powder loss caused by cutting, and the laser etching forms a symmetrical first folding groove 23 and a second folding groove 24 on both sides of the negative electrode sheet 1, and the folding groove facilitates the stacking of the electrode sheets by the stacking mechanism 6 to improve the stacking efficiency, and after the folding groove is formed, the front and back sides of the electrode sheet are hot-pressed and composited by the diaphragm mechanism 3, and the composite assembly facilitates A composite electrode sheet is formed with the positive electrode sheet, and the positive electrode sheet is transported from the discharge component to the cutting component for cutting. After cutting, it is transported to the composite component from top to bottom and from bottom to top by the feeding component and composite hot pressed with the negative electrode sheet 1 to form alternating composite electrode sheets. Finally, the composite assembly is staggered and stacked by the stacking mechanism 6 to form a battery by folding it in half. The stacking mechanism 6 is provided with a stacking box 61 and a stacking positioning sheet to improve the stacking accuracy during the stacking process. The stacking box 61 is provided with two or more to improve the stacking efficiency. It has strong practicality and good application prospects.

[0040] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery cell stacking device, characterized in that: include A negative electrode sheet discharging mechanism, the negative electrode sheet discharging mechanism is used for discharging negative electrode sheets, the negative electrode sheet comprising a first surface and a second surface; An etching mechanism, the etching mechanism comprising a first etching component and a second etching component, the first etching component laser etches the first surface to form a first folded groove, the second etching component laser etches the second surface to form a second folded groove, the first folded groove and the second folded groove are arranged opposite to each other to separate the negative electrode sheets to form a negative electrode sheet group; A diaphragm mechanism, the diaphragm mechanism comprising a first diaphragm discharge assembly, a second diaphragm discharge assembly and a diaphragm composite assembly, the first diaphragm discharge assembly and the second diaphragm discharge assembly are used to discharge the diaphragms on the first and second surfaces respectively, and the diaphragms are composited on the first and second surfaces through the diaphragm composite assembly; A first positive electrode sheet mechanism, the first positive electrode sheet mechanism comprising a first discharge assembly, a first feeding assembly, a first cutting assembly and a first electrode sheet composite assembly, the first discharge assembly is used for the first positive electrode sheet mechanism to discharge materials, the first feeding assembly is used for conveying one end of the first positive electrode sheet mechanism to the first cutting assembly for cutting, and the first electrode sheet composite assembly is used for hot pressing and composite the first positive electrode sheet mechanism with the first surface of the negative electrode sheet mechanism; A second positive electrode sheet mechanism, the second positive electrode sheet mechanism comprising a second discharge assembly, a second feeding assembly, a second cutting assembly and a second electrode sheet composite assembly, the second discharge assembly is used for the second positive electrode sheet mechanism to discharge materials, the second feeding assembly is used for conveying one end of the second positive electrode sheet mechanism to the second cutting assembly for cutting, and the second electrode sheet composite assembly is used for hot pressing and composite the second positive electrode sheet mechanism with the second surface of the negative electrode sheet mechanism; The first surface of the negative electrode sheet and the first positive electrode sheet are hot pressed through a first electrode sheet composite assembly to form a first composite electrode sheet; The second surface of the negative electrode sheet and the second positive electrode sheet structure are hot pressed through a second electrode sheet composite assembly to form a second composite electrode sheet.

2. The battery cell stacking device according to claim 1, characterized in that: A stacking mechanism is provided on one side of the second positive electrode sheet mechanism. The stacking mechanism includes a stacking box and a stacking positioning plate. The stacking positioning plate is arranged on the outside of the stacking box.

3. The battery cell stacking device according to claim 2, characterized in that: The stacking box staggers and folds the first composite pole piece and the second composite pole piece to form a stack, and the stacking positioning plate presses and positions the stack to form a battery core.

4. The battery cell stacking device according to claim 1, characterized in that: The negative electrode sheet unwinding mechanism comprises a electrode sheet unwinding roller and a electrode sheet unwinding motor for driving the electrode sheet unwinding roller. The electrode sheet unwinding motor is used to drive the electrode sheet unwinding roller to drive the negative electrode sheet to unwind.

5. The battery cell stacking device according to claim 1, characterized in that: The first diaphragm unwinding assembly includes a first diaphragm unwinding roller and a first diaphragm guide roller, wherein the first diaphragm unwinding roller is used to unwind the first diaphragm onto the diaphragm guide roller, and the first diaphragm guide roller is used to guide the first diaphragm toward the first surface of the negative electrode sheet.

6. The battery cell stacking device according to claim 5, characterized in that: The second diaphragm unwinding assembly includes a second diaphragm unwinding roller and a second diaphragm guiding roller, wherein the second diaphragm unwinding roller is used to unwind the second diaphragm onto the diaphragm guiding roller, and the second diaphragm guiding roller is used to guide the second diaphragm toward the second surface of the negative electrode sheet.

7. The battery cell stacking device according to claim 1, characterized in that: The first unwinding assembly includes a first unwinding roller and a first unwinding motor for driving the first unwinding roller, and the first unwinding motor is used to drive the first unwinding roller to drive the first positive electrode sheet mechanism to unwind.

8. The battery cell stacking device according to claim 7, characterized in that: The second unwinding assembly includes a second unwinding roller and a second unwinding motor for driving the second unwinding roller, and the second unwinding motor is used to drive the second unwinding roller to drive the second positive electrode sheet mechanism to unwind.

9. The battery cell stacking device according to claim 1, characterized in that: The first feeding assembly is used to feed one end of the cut first positive electrode sheet structure from bottom to top into the first electrode sheet composite assembly for hot pressing.

10. The battery cell stacking device according to claim 9, characterized in that: The second feeding assembly is used to feed one end of the cut second positive electrode sheet structure from top to bottom into the second composite assembly for hot pressing.

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