Battery cell edge cutting device

Abstract

The utility model relates to a battery cell edge cutting device. The battery cell edge cutting device comprises a cutting knife mechanism, the cutting knife mechanism comprises a first driving mechanism, an upper knife assembly and a lower knife assembly, and the power output end of the first driving mechanism is in transmission connection with the upper knife assembly and used for driving the upper knife assembly to move relative to the lower knife assembly; wherein the upper cutter assembly comprises an upper cutter, the lower cutter assembly comprises a lower cutter, and the upper cutter and the lower cutter are opposite to each other in the vertical direction; the end, opposite to the upper cutter, of the lower cutter is provided with a supporting table used for abutting against the upper cutter, the side portion of the supporting table is provided with a vertically-extending cutting edge, and the cutting edge is used for being tightly attached to the side wall of the upper cutter. According to the scheme provided by the invention, the edge cutting precision of the battery cell can be improved, the occupation of the side edge of the aluminum-plastic film on the thickness space of the battery cell is reduced, and the energy density of the battery is further improved.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a battery cell trimming device. Background Technology

[0002] Soft-pack batteries are the third generation of lithium batteries developed from existing steel-cased, aluminum-cased, and plastic-cased batteries. They are widely favored by users both domestically and internationally due to their advantages such as being lighter, thinner, having better safety performance, meeting high aesthetic requirements, high energy density, stable discharge platform, excellent power performance, and being environmentally friendly and pollution-free. During the encapsulation process of the aluminum-plastic film in soft-pack batteries, excess material or uneven areas may occur at the edges due to the heat-sealing process. Cutting removes these excess parts, ensuring the battery dimensions meet design requirements and facilitating subsequent assembly and installation.

[0003] However, the cell trimming devices in related technologies have difficulty improving the trimming accuracy of the cells, resulting in the trimmed aluminum-plastic film sides occupying a large portion of the cell thickness space, which in turn affects the energy density of the battery. Utility Model Content

[0004] To address or partially address the problems existing in related technologies, this application provides a battery cell trimming device that can improve the trimming accuracy of the battery cell, reduce the space occupied by the aluminum-plastic film side on the battery cell thickness, and thereby improve the energy density of the battery.

[0005] This application provides a battery cell trimming device, comprising:

[0006] A cutting blade mechanism, comprising a first drive mechanism, an upper blade assembly, and a lower blade assembly, wherein the power output end of the first drive mechanism is connected to the upper blade assembly for driving the upper blade assembly to move relative to the lower blade assembly;

[0007] The upper cutting assembly includes an upper cutting blade, and the lower cutting assembly includes a lower cutting blade. The upper cutting blade and the lower cutting blade are opposite each other in the vertical direction. The lower cutting blade is provided with a support platform at the end opposite to the upper cutting blade for abutting against the upper cutting blade. The side of the support platform is provided with a vertically extending cutting edge for closely adhering to the side wall of the upper cutting blade.

[0008] In one implementation, a cell carrier is further included. The cell carrier has a cell fixing part, which is used to limit the cell to a cutting position. The cutting position is opposite to the position between the upper and lower cutting assemblies in the length direction of the tab.

[0009] In one implementation, a vertical pressing mechanism is further included, which comprises a pressure driving component, a pressing block, and a pressure spring. The pressing block is used to press the battery cell vertically against the battery cell carrier.

[0010] The pressure block is connected to the output end of the pressure drive through a guide, and the pressure spring is sleeved on the guide with its two ends abutting against the pressure block and the pressure drive, respectively.

[0011] In one implementation, a cell positioning mechanism is further included, which is disposed on the side of the cutting blade mechanism, and the cell carrier is located between the cutting blade mechanism and the cell positioning mechanism;

[0012] The cell positioning mechanism includes a second driving mechanism and a positioning member. The second driving mechanism is used to drive the positioning member to move, and the positioning member is used to position the cell to be trimmed onto the cell carrier.

[0013] In one implementation, the second driving mechanism includes a movable block and a push rod connected to the movable block. The positioning member is fixed to the movable block, and the end of the positioning member away from the movable block is used to abut against the side wall of the battery cell body in the lateral direction.

[0014] In one implementation, a gap adjustment mechanism is further included. The gap adjustment mechanism is connected to the lower cutting blade drive and is used to adjust the lateral displacement of the lower cutting blade to control the gap between the cutting edge and the side wall of the upper cutting blade.

[0015] In one implementation, a base is further included, on which a mounting plate and a frame fixed relative to the base are provided, the upper blade assembly is assembled to the frame, and the lower blade assembly is assembled to the mounting plate;

[0016] The mounting plate is provided with a guide rail and a slider. The lowering blade assembly is fixed to the slider. The gap adjustment mechanism includes a transmission rod connected to the slider. When the transmission rod is rotated, it is used to drive the lowering blade assembly to move laterally.

[0017] In one implementation, a controller is further included, electrically connected to the first drive mechanism and the second drive mechanism, for controlling the first drive mechanism and the second drive mechanism to operate in coordination.

[0018] In one implementation, the cutting edge is located on the outer side of the lower cutting blade, and the lower end of the upper cutting blade is a planar structure, which is vertically opposite to the support platform of the lower cutting blade.

[0019] In one implementation, the lower cutting blade and / or the upper cutting blade are made of metal.

[0020] The technical solution provided in this application may include the following beneficial effects:

[0021] The solution of this application achieves the cutting of the side of the battery cell through the cooperation of the upper and lower cutting blades. The support platform of the lower cutting blade provides a stable support surface for the upper cutting blade, ensuring the vertical alignment accuracy of the upper and lower blades during cutting and avoiding cutting deviation or misalignment. The vertical cutting edge of the lower cutting blade slides closely against the side of the upper cutting blade, forming a dynamic guide and avoiding lateral displacement during the cutting process. As a result, the cutting accuracy of the battery cell can be improved, the occupancy of the aluminum-plastic film side on the battery cell thickness space can be reduced, and the energy density of the battery can be improved.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0024] Figure 1 This is a side view of the cutting blade mechanism of the battery cell trimming device shown in an embodiment of this application;

[0025] Figure 2 This is a perspective view of the cutting blade mechanism of the battery cell trimming device shown in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram showing the cooperation between the cutting blade mechanism and the battery cell positioning mechanism of the battery cell trimming device in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the cell positioning mechanism of the cell trimming device shown in the embodiments of this application;

[0028] Figure label:

[0029] 100. Cutting blade mechanism; 110. First drive mechanism; 120. Upper cutting blade; 130. Lower cutting blade; 131. Cutting edge; 132. Support platform; 140. Pressure drive component; 150. Pressure spring; 160. Pressure block; 170. Base; 180. Frame; 181. Top plate; 182. Side plate; 190. Gap adjustment mechanism; 191. Adjustment handle; 200. Battery cell positioning mechanism; 210. Second drive mechanism; 220. Positioning component; 230. Moving block; 240. Push rod; 250. Mounting plate; 260. Guide rail; 270. Slider; 300. Battery cell. Detailed Implementation

[0030] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Existing cell trimming devices in related technologies struggle to improve trimming accuracy, resulting in the trimmed aluminum-plastic film sides occupying a significant portion of the cell's thickness, thus affecting the battery's energy density. This application provides a cell trimming device.

[0036] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a side view of the cutting blade mechanism of the battery cell trimming device shown in an embodiment of this application; Figure 2 This is a perspective view of the cutting blade mechanism of the battery cell trimming device shown in the embodiments of this application.

[0038] Please see also Figure 1 and Figure 2 This application provides a battery cell trimming device, which includes a cutting blade mechanism 100. The cutting blade mechanism 100 includes a first drive mechanism 110, an upper blade assembly, and a lower blade assembly. The power output end of the first drive mechanism 110 is connected to the upper blade assembly for driving the upper blade assembly to move relative to the lower blade assembly. The upper blade assembly includes an upper cutting blade 120, and the lower blade assembly includes a lower cutting blade 130. The upper cutting blade 120 and the lower cutting blade 130 are opposite each other in the vertical direction. The lower cutting blade 130 is provided with a support platform 132 at the end opposite to the upper cutting blade 120 for abutting against the upper cutting blade 120. The side of the support platform 132 is provided with a vertically extending cutting edge 131 for closely abutting against the side wall of the upper cutting blade 120.

[0039] The battery cell trimming device of this application includes a first driving mechanism that may include a driving source and a transmission device. The driving source may be a cylinder or a motor, and the transmission device may be a telescopic rod connected to the power output end of the driving source. The lower cutting assembly may be fixedly installed. The first driving mechanism 110 drives the upper cutting assembly to reciprocate linearly in the vertical direction relative to the lower cutting assembly. The upper cutting blade 120 and the lower cutting blade 130 cooperate to cut the side of the battery cell 300, wherein the side of the battery cell refers to the excess side and the second sealing edge formed after the battery cell is covered by aluminum-plastic film.

[0040] The cutting edge 131 of the lower cutter 130 is located on the outer side of the lower cutter 130, and the lower end of the upper cutter 120 is a planar structure, which is vertically opposite to the support platform 132 of the lower cutter 130. On the one hand, the support platform 132 of the lower cutter 130 provides a stable support surface for the upper cutter 120, ensuring the vertical alignment accuracy of the upper and lower blades during cutting and avoiding cutting deviation or misalignment. The support platform 132 and the upper cutter 120 cooperate closely to reduce the cutting impact force and prevent the cutting vibration from causing cell displacement or deformation. On the other hand, the vertical cutting edge 131 of the lower cutter 130 slides close to the side of the upper cutter 120, forming a dynamic guide to avoid lateral deviation during the cutting process and ensure the consistency of the cutting path. In this way, the cutting accuracy of the cell can be improved, the occupancy of the aluminum-plastic film side on the cell thickness space can be reduced, and the energy density of the battery can be improved.

[0041] The cutting edge 131 and the upper cutter 120 form a shearing force concentration zone, directly cutting the aluminum-plastic film, avoiding material stretching or burrs, and the cut surface is flat and smooth; through the cooperation and sliding of the cutting edge 131 and the upper cutter 120, the edge of the cut aluminum-plastic film is forced to bend in a predetermined direction (such as bending inward), which facilitates the optimization of the sealing performance of the subsequent packaging process.

[0042] In this application, the lower cutting blade 130 and / or the upper cutting blade 120 are made of metal. The high hardness and rigidity of metal materials (such as tool steel and cemented carbide) can withstand the shearing force generated when cutting aluminum-plastic film (especially when cutting multi-layer composite aluminum-plastic film), preventing the blade from curling or chipping, and ensuring the straightness and flatness of the cut edges.

[0043] In some embodiments, the cell trimming device further includes a cell carrier (not shown), which has a cell fixing part for fixing the cell 300 at the cutting position, which is opposite to the position between the upper and lower cutting assemblies in the length direction of the electrode tab. The cell carrier can be a conveying platform or a turntable, and has suction holes that are connected to a vacuum device.

[0044] See also Figure 1 and Figure 2In some embodiments, the cell trimming device further includes a vertical pressing mechanism, which comprises a pressure drive 140, a pressing block 160, and a pressure spring 150. The pressing block 160 is used to press the cell vertically against the cell carrier. The pressing block 160 is connected to the output end of the pressure drive 140 through a guide. The pressure spring 150 is sleeved on the guide and its two ends abut against the pressing block 160 and the pressure drive 140, respectively. In the pressed state, the aluminum-plastic film is flat and adheres to the cell carrier, ensuring that the side sealing edge width is consistent after trimming, meeting the requirements of the second sealing process. After trimming, the spring pushes the pressing block 160 to immediately reset, preventing the cell from leaving the workstation due to the inertia of the cutter return stroke and avoiding collision damage. The pressure drive 140 drives the pressing block 160 to rise and fall rapidly, which, in conjunction with the cycle of the trimming mechanism, enables high-speed continuous production.

[0045] The guide component can be a vertical guide post, which constrains the movement direction of the pressure block 160, preventing the battery cell from sliding laterally along the battery cell carrier during the cutting process and avoiding cutting misalignment due to offset. The pressure spring 150, through preload adjustment, allows the pressure block 160 to adaptively apply pressure according to the battery cell thickness, avoiding overpressure damage to the internal structure of the battery cell. The uniform distribution design of the spring ensures that the contact pressure of the pressure block 160 on the battery cell is evenly distributed, preventing local stress concentration that could lead to wrinkles or deformation of the aluminum-plastic film. The driving component can be a cylinder, which provides a stable reaction force, forming a "rigid-flexible composite" system together with the pressure spring 150, balancing cutting stability and battery cell protection.

[0046] See Figure 3 and Figure 4 In some embodiments, the battery cell trimming device further includes a battery cell positioning mechanism 200, which is located on the side of the cutting blade mechanism 100. The battery cell carrier is located between the cutting blade mechanism 100 and the battery cell positioning mechanism 200. The battery cell positioning mechanism 200 includes a second driving mechanism 210 and a positioning member 220. The second driving mechanism 210 is used to drive the positioning member 220 to move, and the positioning member 220 is used to position the battery cell 300 to be trimmed on the battery cell carrier. In this embodiment, the solution works in conjunction with the vertical clamping mechanism to clamp the battery cell body at the cutting station, ensuring that the edge of the aluminum-plastic film is aligned with the upper and lower cutting blades 130 during cutting.

[0047] The second drive mechanism 210 includes a moving block 230 and a push rod 240 connected to the moving block 230. A positioning member 220 is fixed to the moving block 230, and the end of the positioning member 220 away from the moving block 230 is used to abut against the side wall of the battery cell body in the lateral direction.

[0048] See Figure 4In some embodiments, the moving block 230 is L-shaped, and the positioning member 220 has a plate-like structure. The positioning member 220 has a recessed platform structure on the side near the battery cell support. The end of the positioning member 220 abuts against the side wall of the battery cell body. The aluminum-plastic film side of the battery cell is located on the upper surface of the recessed platform structure. The recessed platform structure not only prevents deformation of the aluminum-plastic film side but also positions the battery cell in both the vertical and horizontal directions. In this embodiment, the elastic member can be a spring. Under the elastic pressure provided by the spring, it can adapt to battery cells of different widths. The spring can adopt a variable pitch helical structure to ensure that the battery cell remains stably clamped during the folding process.

[0049] During the trimming process, the battery 300 is first placed on the battery cell carrier, which supports the main body of the battery cell. The side of the battery cell to be trimmed extends out of the battery cell carrier and is suspended in the air. At this time, the second drive mechanism 210 operates and adjusts the lateral position of the battery cell on the battery cell carrier through the positioning component 220. In conjunction with the vertical pressing mechanism, the battery cell 300 is accurately positioned on the battery cell carrier. Then, the first drive unit operates and controls the upper cutting blade 120 to move downward to achieve the trimming of the side of the battery cell.

[0050] In some embodiments, the cell trimming device also includes a controller electrically connected to the first drive mechanism 110, the vacuum device, the vertical pressing mechanism, and the second drive mechanism 210. The controller is used to control the coordinated operation of the first drive mechanism 110, the vacuum device, the vertical pressing mechanism, and the second drive mechanism 210. Each mechanism can interact with data via a bus. Equipped with a controller, the position and pressure parameters are adjusted synchronously, which can improve trimming accuracy and trimming efficiency.

[0051] In some embodiments, the cell trimming device further includes a gap adjustment mechanism 190, which is connected to the lower cutting blade 130 for adjusting the lateral displacement of the lower cutting blade 130 to control the gap between the cutting edge 131 and the side wall of the upper cutting blade 120. The blade gap adjustment device can finely adjust the distance between the upper and lower blades in real time to adapt to different thicknesses of aluminum-plastic film or cutting depth requirements. The gap adjustment range can be 0.01-0.5mm to ensure matching with the thickness of the aluminum-plastic film and avoid incomplete cutting.

[0052] In some embodiments, the cell trimming device further includes a base 170, on which a mounting plate 250 and a frame 180 fixed relative to the base 170 are provided. The upper blade assembly is mounted on the frame 180. Specifically, the frame includes a top plate 181, a first drive mechanism is mounted on the top plate 181, a side plate 182 is mounted on one side of the frame 180, and a vertical pressing mechanism is mounted on the side plate 182. The lower blade assembly is mounted on the mounting plate 250; the mounting plate 250 is provided with a guide rail 260 and a slider. The lower blade assembly is fixed to the slider. The gap adjustment mechanism includes a transmission rod connected to the slider. When the transmission rod is rotated, it is used to drive the lower blade assembly to move laterally, thereby achieving precise control of the gap between the upper cutting blade 120 and the lower cutting blade 130. After precise control of the gap, the cutting edges of the upper cutting blade 120 and the lower cutting blade 130 form a stable shearing force, avoiding burrs or delamination of the aluminum-plastic film due to stretching. In some embodiments, the gap adjustment mechanism further includes an adjustment handle 191 and a scale, which can be used to precisely adjust the gap between the upper cutter 120 and the lower cutter 130.

[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery cell trimming device, characterized in that, include: A cutting blade mechanism, comprising a first drive mechanism, an upper blade assembly, and a lower blade assembly, wherein the power output end of the first drive mechanism is connected to the upper blade assembly for driving the upper blade assembly to move relative to the lower blade assembly; The upper cutting assembly includes an upper cutting blade, and the lower cutting assembly includes a lower cutting blade. The upper cutting blade and the lower cutting blade are opposite each other in the vertical direction. The lower cutting blade is provided with a support platform at the end opposite to the upper cutting blade for abutting against the upper cutting blade. The side of the support platform is provided with a vertically extending cutting edge for closely adhering to the side wall of the upper cutting blade.

2. The cell trimming device according to claim 1, characterized in that: It also includes a cell carrier, which has a cell fixing part for fixing the cell at a cutting position, which is opposite to the position between the upper and lower cutting assemblies in the length direction of the tab.

3. The cell trimming device according to claim 2, characterized in that: It also includes a vertical pressing mechanism, which comprises a pressure driving component, a pressing block, and a pressure spring. The pressing block is used to press the battery cell vertically against the battery cell carrier. The pressure block is connected to the output end of the pressure drive through a guide, and the pressure spring is sleeved on the guide with its two ends abutting against the pressure block and the pressure drive, respectively.

4. The cell trimming device according to claim 2, characterized in that: It also includes a cell positioning mechanism, which is located on the side of the cutting blade mechanism, and the cell carrier is located between the cutting blade mechanism and the cell positioning mechanism; The cell positioning mechanism includes a second driving mechanism and a positioning member. The second driving mechanism is used to drive the positioning member to move, and the positioning member is used to position the cell to be trimmed onto the cell carrier.

5. The cell trimming device according to claim 4, characterized in that: The second drive mechanism includes a moving block and a push rod connected to the moving block. The positioning member is fixed to the moving block, and the end of the positioning member away from the moving block is used to abut against the side wall of the cell body in the lateral direction.

6. The cell trimming device according to claim 1, characterized in that: It also includes a gap adjustment mechanism, which is connected to the lower cutting blade drive and is used to adjust the lateral displacement of the lower cutting blade to control the gap between the cutting edge and the side wall of the upper cutting blade.

7. The cell trimming device according to claim 6, characterized in that: It also includes a base, on which a mounting plate and a frame fixed relative to the base are provided, the upper blade assembly is assembled to the frame, and the lower blade assembly is assembled to the mounting plate; The mounting plate is provided with a guide rail and a slider. The lowering blade assembly is fixed to the slider. The gap adjustment mechanism includes a transmission rod connected to the slider. When the transmission rod is rotated, it is used to drive the lowering blade assembly to move laterally.

8. The cell trimming device according to claim 5, characterized in that: It also includes a controller, which is electrically connected to the first drive mechanism and the second drive mechanism, for controlling the first drive mechanism and the second drive mechanism to operate in coordination.

9. The cell trimming device according to claim 1, characterized in that: The cutting edge is located on the outer side of the lower cutting blade, and the lower end of the upper cutting blade is a planar structure, which is vertically opposite to the support platform of the lower cutting blade.

10. The cell trimming device according to claim 1, characterized in that: The lower cutting blade and / or the upper cutting blade are made of metal.

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