Leveling mechanism and cylindrical battery production device

Abstract

The utility model discloses a leveling mechanism and a cylindrical battery production device, and relates to the technical field of battery production. The leveling device specifically comprises a first leveling piece, a second leveling piece and a shaping pressure head, and at least one of the first leveling piece and the second leveling piece can be close to or away from each other in the direction of a connecting line between the first leveling piece and the second leveling piece; the shaping pressure head comprises a first pressure head and at least one secondary pressure head which are nested in sequence; and when the first leveling piece and the second leveling piece drive the shaping pressure head to approach the leading-out end, the first pressure head wraps the periphery of the leading-out end, and the first pressure head and one secondary pressure head sequentially move to the leading-out end or the first pressure head and the plurality of secondary pressure heads sequentially move to the leading-out end. The first pressing head and the secondary pressing head can flatten the leading-out end, a flattening mechanism with multiple stations does not need to be adopted, the number of times of product transfer is reduced, the complexity of the production process is reduced, meanwhile, the first pressing head and the secondary pressing head flatten the leading-out end in sequence, and accurate positioning and uniform stress of the leading-out end in the flattening process are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a flattening mechanism and a cylindrical battery production device. Background Technology

[0002] During the assembly of cylindrical batteries, the tabs need to be kept flat and precisely aligned to ensure good electrical connections inside the battery and the stability of the overall structure. A flattening mechanism uses mechanical devices, such as flat plates and pressure rollers, to physically tap and compress the tabs, making them flat and accurately aligned to meet the requirements of subsequent processes.

[0003] In existing technologies, the flattening mechanism is set up with multiple stations in sequence, so that the flattening position and force between different stations are different, and the tabs at the end of the cylindrical battery are flattened in sequence to achieve uniform flattening of the battery tabs. However, the above solution requires multiple transfers and positioning of the battery cell, which increases the complexity and cost of the production process. At the same time, the transfer process can also cause the alignment of the battery cell tabs to deviate. The previous tabs become convex tabs after flattening. Under long-term oscillation, the convex tabs may insert into the separator, causing a short circuit in the core and increasing the safety risk of the product.

[0004] Therefore, this application aims to solve the problem of low efficiency caused by the flattening and transfer of the electrode tab, while improving the flattening safety and stability of the electrode tab. Utility Model Content

[0005] The main purpose of this utility model is to provide a flattening mechanism and a cylindrical battery production device, which aims to improve the flattening efficiency of the lead-out end, while ensuring the accurate positioning and uniform force of the lead-out end during the flattening process, thereby reducing production costs and safety risks.

[0006] To achieve the above objectives, this utility model proposes a flattening mechanism, comprising:

[0007] The first flat piece and the second flat piece, at least one of which can move closer or further away along the line connecting the two;

[0008] A shaping pressure head is connected to one of the opposing ends of the first flattening member and the second flattening member, and includes a first pressure head and at least one secondary pressure head nested in sequence.

[0009] When the first flattening member and the second flattening member drive the shaping pressure head to approach the lead-out end, the first pressure head wraps around the periphery of the lead-out end, and the first pressure head and one of the secondary pressure heads move toward the lead-out end in sequence, or the first pressure head and multiple of the secondary pressure heads move toward the lead-out end in sequence.

[0010] In the above scheme, the first flattening piece and the second flattening piece are fixedly connected with the first pressure head, so that the first pressure head can move close to or away from the second flattening piece, and the first pressure heads on both sides can flatten the lead-out end. The secondary pressure head slides on the first flattening piece and the second flattening piece, so that one or more secondary pressure heads can flatten the lead-out end with the first pressure head in sections, ensuring the cooperation between the first pressure head and the secondary pressure head, improving the flattening effect, avoiding the use of original different stations to replace, causing the deviation of the tab alignment of the battery cell, affecting the quality of the product, and also existing safety risk.

[0011] Further, the first flattening piece and the second flattening piece are connected with a second moving part and a third moving part along the direction of the line between them, the secondary pressure head includes a second pressure head and a third pressure head, and the second pressure head and the third pressure head are respectively connected to the output end of the second moving part and the output end of the third moving part.

[0012] By dividing the core end face shaping into three regions, and the shaping compression amount and the pressure head contact surface arc of each region are different, and the gradually changing tab pre-folding scheme can effectively improve the core end face shaping effect.

[0013] Further, the first pressure head, the second pressure head and the third pressure head acting on the end face of the lead-out end are provided with inclined slopes. The inclined slopes of the second pressure head and the third pressure head flatten the inclined convex tabs in turn, and the cycle is repeated until the tab is completely attached to the lead-out end, ensuring that the flattening effect is uniform and stable, and improving the overall assembly precision. In addition, the angle design of each pressure head slope needs to be accurately matched to ensure that the tab is uniformly stressed during bending to avoid uneven flattening or damage caused by angle deviation.

[0014] Further, the angles of the inclined slopes of the first pressure head, the second pressure head and the third pressure head decrease in turn.

[0015] Further, a pressing block is provided between the second moving part and the second pressure head, and the pressing block is connected to the end face of the second pressure head.

[0016] Further, the third moving part is placed in the open end of the middle part of the pressing block, and the end face of the third moving part is connected to the end face of the third pressure head.

[0017] Further, the first pressure head includes a first pressing block and a second pressing block, the first pressing block is fixedly connected to the first flattening piece and the second flattening piece, and the second pressing block moves close to or away from the first pressing block along the direction perpendicular to the line connecting the first flattening piece and the second flattening piece.

[0018] Further, the first flattening piece and the second flattening piece respectively comprise a first support and a second support, and the second pressing block is mounted on the first support and the second support respectively.

[0019] Further, the first support and the second support are provided with a first telescopic piece, and an output end of the telescopic piece is fixed with the first pressing block.

[0020] The application further discloses a cylindrical battery production device, characterized in that the flattening mechanism is mounted.

[0021] The first pressing head, the second pressing head and the third pressing head form a segmented moving path, and the tab ears on the end face of the winding core are flattened from outside to inside in sequence.

[0022] The above technical scheme has the following advantages:

[0023] The first pressing head and the secondary pressing head can flatten the leading end respectively, the number of product transfer is reduced, the production process complexity is reduced, the first pressing head and the secondary pressing head flatten the leading end in sequence, the accurate positioning and uniform stress of the leading end in the flattening process are ensured, and the production cost and safety risk are reduced.

[0024] The first pressing head and the secondary pressing head can flatten the leading end respectively, the number of product transfer is reduced, the production process complexity is reduced, the first pressing head and the secondary pressing head flatten the leading end in sequence, the accurate positioning and uniform stress of the leading end in the flattening process are ensured, and the production cost and safety risk are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be explained in detail below in combination with specific embodiment and drawings, wherein:

[0026] Figure 1 It is the first visual angle structure schematic diagram of the utility model;

[0027] Figure 2 It is the second visual angle structure schematic diagram of the utility model;

[0028] Figure 3 It is the structure schematic diagram of the second flattening piece of the utility model;

[0029] Figure 4 It is the structure schematic view of the shaping press head of the utility model.

[0030] In the drawing: 1, bottom plate; 2, first flattening piece; 21, first support; 3, shaping press head; 31, first press head; 311, first pressing block; 312, second pressing block; 32, second press head; 33, third press head; 34, first telescopic piece; 4, second flattening piece; 41, moving plate; 42, second support; 5, second telescopic piece; 51, first moving part; 52, second moving part; 53, pressing block; 54, third moving part. DETAILED DESCRIPTION

[0031] In order to make the utility model purposes, technical solutions and advantages more clearly, the following will be combined with the drawings and examples to make detailed description to the utility model. It should be understood that the following specific examples are only used to explain the utility model, and do not constitute the limitation to the utility model.

[0032] As Figure 1 And Figure 4 Shown, a flattening mechanism, including first flattening piece 2, second flattening piece 4 and shaping press head 3, at least one of first flattening piece 2 and second flattening piece 4 can be close to or away from the direction of the connecting line between them;Shaping press head 3 is connected to the end of first flattening piece 2 and second flattening piece 4 facing each other, which includes first press head 31 and at least one secondary press head nested in turn;When first flattening piece 2 and second flattening piece 4 drive shaping press head 3 to approach the lead-out end, first press head 31 wraps around the lead-out end, first press head 31 and a secondary press head move to the lead-out end in turn or first press head 31 and multiple secondary press heads move to the lead-out end in turn. Wherein, first flattening piece 2 and second flattening piece 4 can be close to or away from each other through external equipment, in this application, first flattening piece 2 and second flattening piece 4 are placed on the bottom plate 1, first flattening piece 2 and second flattening piece 4 are close to or away from each other by the way of guide rail, the guide rail structure ensures the smooth movement of the flattening piece, reduces friction and wear, prolongs the service life of the equipment. In order to improve the accuracy of the flattening position of the lead-out end, preferably first flattening piece 2 is fixed on the bottom plate 1, and second flattening piece 4 can be close to or away from first flattening piece 2.

[0033] Specifically, the first flattening member 2 and the second flattening member 4 are provided with shaping pressure heads 3, and the first pressure head 31 and the secondary pressure head are sequentially designed from the outer ring to the inner ring, wherein the first flattening member 2 and the second flattening member 4 are fixedly connected with the first pressure head 31, so that the first pressure head 31 can approach or move away from the first flattening member 2 along the second flattening member 4, and the first pressure head 31 on both sides can flatten the lead-out end, and the secondary pressure head slides on the first flattening member 2 and the second flattening member 4, so that one or more secondary pressure heads can segmentally flatten the lead-out end with the first pressure head 31, ensuring the cooperation between the first pressure head 31 and the secondary pressure head, improving the flattening effect, avoiding the replacement of the original different stations, causing the deviation of the tab alignment of the battery cell, affecting the quality of the product, and also existing safety risk.

[0034] The lead-out end of the present application is preferably the tab of the winding core, so that the first pressure head 31 and the plurality of secondary pressure heads can sequentially segmentally flatten the tab of the winding core, ensuring that each pressure head can accurately act on different parts of the tab, thereby realizing uniform stress of the tab, reducing deformation or damage caused by uneven stress, and further improving the overall quality and stability of the product. In addition, the lead-out end can also be applied to other types of electronic elements, such as tab flattening and alignment processing of capacitors, lead-out wire flattening of motors, etc., by flexibly adjusting the combination mode of the flattening member and the pressure head, different process requirements can be met, and production efficiency and yield can be improved. The following lead-out end is taken as an example of the tab.

[0035] As shown in Figure 2 and Figure 3 , the first flattening member 2 and the second flattening member 4 are connected with the second moving part 52 and the third moving part 54 along the connecting line direction between them, and the secondary pressure head includes the second pressure head 32 and the third pressure head 33, and the second pressure head 32 and the third pressure head 33 are respectively connected to the output end of the second moving part 52 and the output end of the third moving part 54. Among them, the second moving part 52 and the third moving part 54 can adopt guide rail, lead screw, guide column or other transmission mechanism to ensure the accurate positioning and stable movement of the secondary pressure head, and the application preferably adopts the guide column transmission mode.

[0036] On the first flattening member 2 and the second flattening member 4, the first flattening member 2 and the second flattening member 4 respectively include the first support 21 and the second support 42, the first support 21 is fixed on the bottom plate 1, and the bottom end of the second support 42 is fixedly installed with the moving plate 41, the moving plate 41 slides on the bottom plate 1 through the guide rail, and approaches or moves away from the first support 21, and the second support 42 and the moving plate 41 are used as the first moving part 51 of the application, in addition, the first moving part 51 can also adopt the sliding mode of the moving plate 41 and the remaining part of the bottom plate 1, such as through the structure of the roller or the sliding block to realize flexible adjustment.

[0037] For the description of the second moving part 52 and the third moving part 54, the first flattening part 2 is the same as the second flattening part 4, and the second moving part 52 is slidingly arranged on the moving plate 41 to drive the second pressure head 32 to move towards or away from the tab, when the moving plate 41 moves towards or away from the tab, it drives the first pressure head 31 to move towards or away from the tab synchronously to flatten the tab with the first pressure head 31; the third moving part 54 is arranged on the moving plate 41, so that when the moving plate 41 moves towards the tab, the second moving part 52 and the third moving part 54 move towards the tab synchronously, and after the first pressure head 31 flattens the tab, the second moving part 52 and the third moving part 54 drive the second pressure head 32 and the third pressure head 33 to flatten the tab respectively, that is, the second extension part 5 is installed on the first moving part 51, the output end of the second extension part 5 penetrates the second moving part 52 and is connected with the third pressure head 33, which drives the third pressure head 33 to extend or retract; in addition, the second moving part 52 can also be arranged at the output end of the third moving part 54, that is, when the second moving part 52 extends towards the tab, it drives the second pressure head 32 to flatten the tab, at the same time, it also drives the third moving part 54 to move towards the tab, and when the second pressure head 32 flattens the tab, the third moving part 54 drives the third pressure head 33 to flatten the tab, so as to reduce the moving distance of the third pressure head 33, in this application, the second extension part 5 can be directly installed on the plate body of the second moving part 52 and drive the third pressure head 33 to extend or retract.

[0038] The above-mentioned second moving part 52 and third moving part 54 can be externally connected to a driving source, such as an external cylinder or an electric cylinder, to drive the second pressure head 32 and the third pressure head 33 to move towards or away from the tab, so as to complete the flattening operation of the tab.

[0039] As shown in Figure 4 In order to further improve the flattening effect of the tab, the end face of the first pressure head 31, the second pressure head 32 and the third pressure head 33 acting on the lead-out end is provided with an inclined slope, so that when the first pressure head 31, the second pressure head 32 and the third pressure head 33 flatten the tab in turn, the slope of the first pressure head 31 wraps around the periphery of the tab and causes the tab to tilt and bend towards the second pressure head 32 and the third pressure head 33, and then the inclined slope of the second pressure head 32 and the inclined slope of the third pressure head 33 flatten the inclined and convex tab in turn, and the cycle is repeated until the tab completely adheres to the lead-out end, ensuring that the flattening effect is uniform and stable, and improving the overall assembly precision. In addition, the angle of each pressure head slope needs to be accurately matched to ensure that the tab is evenly stressed during bending to avoid uneven flattening or damage due to angle deviation. Specifically as follows:

[0040] The inclination angle of the inclined surface of the first, second and third pressing heads 31, 32 and 33 decreases in turn. The design of the inclination angle aims to gradually reduce the flattening force to prevent the tab from being deformed excessively. The inclination angle of the first pressing head 31 is the largest, playing a leading role; the inclination angle of the second pressing head 32 is the second, refining the flattening effect; and the inclination angle of the third pressing head 33 is the smallest, performing fine adjustment. Through the design of the inclination angle decreasing in stages, it is ensured that the tab gradually adapts during the stress process, and finally realizes the flattening effect of being smooth and damage-free, greatly improving the fit of the tab and the lead-out end. The accurate control of the inclination angle of each pressing head not only optimizes the distribution of the flattening force, but also significantly improves the flatness and stability of the tab.

[0041] As shown in Figure 3 , a pressing block 53 is arranged between the second mobile component 52 and the second pressing head 32, and the pressing block 53 is connected to the end face of the second pressing head 32. The pressing block 53 provides additional support when the second pressing head 32 flattens the tab, ensuring uniform distribution of force. The linkage mechanism between the third mobile component 54 and the third pressing head 33 is the same; the pressing block 53 can be fixed with the second mobile component 52, such as being integrally formed, or can be independently installed, flexibly adjusting the support force to further optimize the flattening effect. If the pressing block 53 is independently installed with the second mobile component 52, the second mobile component 52 can only be attached to the pressing block 53. When the pressing block 53 presses the second pressing head 32, the second mobile component 52 retracts, and the pressing block 53 provides a continuous and stable restoring force through an elastic structure such as a rectangular spring or a compression spring, facilitating subsequent flattening operations.

[0042] As shown in Figure 3 , the third mobile component 54 is placed in the open end of the middle part of the pressing block 53, and the end face of the third mobile component 54 is connected to the end face of the third pressing head 33. To ensure the movement path of the third pressing head 33, the third mobile component 54 is located in the middle part of the pressing block 53, and the open end design facilitates the flexible cooperation of the pressing block 53 and the third pressing head 33, ensuring smooth movement. The middle part of the pressing block 53 is reserved for space, allowing the third mobile component 54 to freely extend and retract inside the pressing block 53, avoiding interference.

[0043] As shown in Figures 2-4 , the first pressing head 31 includes a first pressing block 311 and a second pressing block 312. The first pressing block 311 is fixedly connected to the first flattening member 2 and the second flattening member 4, and the second pressing block 312 approaches or moves away from the first pressing block 311 along a direction perpendicular to the connecting line of the first flattening member 2 and the second flattening member 4, realizing the opening and closing adjustment of the first pressing head 31, facilitating the fine adjustment of tabs of different sizes, and ensuring the flattening accuracy.

[0044] As shown in Figure 1 and Figure 2As shown, the second pressing block 312 is mounted on the first support 21 and the second support 42 respectively, the first support 21 can be mounted on the bottom plate 1 or the bottom end of the first support 21, and the second support 42 is connected with the bottom plate 1 through a slide rail to realize horizontal movement, flexibly adjust the position of the second pressing block 312 to adapt to different tab width requirements.

[0045] As shown in Figure 1 and Figure 2 As shown, the first support 21 and the second support 42 are both mounted with the first telescopic member 34, and the output end of the telescopic member is fixed with the first pressing block 311. The first telescopic member 34 is in a vertical direction, and the output end thereof is fixed with the first pressing block 311. Through the telescopic adjustment of the telescopic member, the contact force of the first pressing block 311 with the tab can be accurately controlled, so that the stress of the tab during the flattening process is uniform, and the flattening effect is further improved. The first telescopic member 34 can adopt a high-precision sensor to monitor the force change in real time, automatically adjust the telescopic amplitude, and ensure that the flattening force is constant.

[0046] The first telescopic member 34 and the second telescopic member 5 preferably adopt a pneumatic cylinder or an electric cylinder.

[0047] A cylindrical battery production device is provided with the flattening mechanism, the shaping pressure head 3 acts on the tab of the cylindrical battery, the shaping pressure head 3 acts on the tab of the core end face, the first pressure head 31, the second pressure head 32 and the third pressure head 33 form a segmented moving path, and the tabs on the core end face are flattened from outside to inside in turn. Each segment has a motor to separately control the moving speed and moving distance of the flattening block, so that the purpose of segmental shaping of different pre-folding heights of the inner and outer rings of the tab is realized, the tab interference is avoided, the tab root redundancy is reduced, the tab flatness of the cylindrical battery is ensured, the overall structural stability of the battery is improved, and the service life is prolonged.

[0048] The diameter of the shaping pressure head 3 is set as D, the diameter range of the first pressure head 31 is (0.6D-D), the diameter range of the second pressure head 32 is (0.4-0.6D), and the diameter range of the third pressure head 33 is (0.3D-0.5D). The end face of the pressure head is a conical surface, and the inclination angles of the conical surfaces are first pressure head 31>second pressure head 32>third pressure head 33. By dividing the core end face into three regions and making the shaping compression amount and the curvature of the contact surface of the pressure head different in each region, the core end face shaping effect can be effectively improved by matching the gradually changing tab pre-folding scheme.

[0049] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A flattening mechanism characterized by, The application relates to a flattening mechanism for a cylindrical battery, which comprises: a first flattening part (2) and a second flattening part (4), at least one of which can move towards or away from the line connecting the two; a shaping pressure head (3) connected to the end of the first flattening part (2) and the second flattening part (4) facing each other, which comprises a first pressure head (31) and at least one secondary pressure head nested in sequence; when the first flattening part (2) and the second flattening part (4) drive the shaping pressure head (3) to move towards the leading end, the first pressure head (31) wraps around the periphery of the leading end, and the first pressure head (31) and the secondary pressure head move towards the leading end in sequence.

2. The flattening mechanism of claim 1, wherein The first flattening part (2) and the second flattening part (4) are connected with a second moving part (52) and a third moving part (54) in the line connecting the two, the secondary pressure head comprises a second pressure head (32) and a third pressure head (33), and the second pressure head (32) and the third pressure head (33) are respectively connected to the output end of the second moving part (52) and the output end of the third moving part (54).

3. The flattening mechanism of claim 2, wherein, The end surface of the first pressure head (31), the second pressure head (32) and the third pressure head (33) acting on the end surface of the leading end is provided with an inclined slope.

4. The flattening mechanism of claim 3, wherein The angle of the inclined slope of the first pressure head (31), the second pressure head (32) and the third pressure head (33) decreases in sequence.

5. The flattening mechanism of claim 2, wherein, A pressing block (53) is arranged between the second moving part (52) and the second pressure head (32), and the pressing block (53) is connected to the end surface of the second pressure head (32).

6. The flattening mechanism of claim 5, wherein, The third moving part (54) is arranged in the open end of the middle part of the pressing block (53), and the end surface of the third moving part (54) is connected to the end surface of the third pressure head (33).

7. The flattening mechanism of claim 1, wherein The first pressure head (31) comprises a first pressing block (311) and a second pressing block (312), the first pressing block (311) is fixedly connected to the first flattening part (2) and the second flattening part (4), and the second pressing block (312) moves towards or away from the first pressing block (311) in the direction perpendicular to the line connecting the first flattening part (2) and the second flattening part (4).

8. The flattening mechanism of claim 7, wherein, The first flattening part (2) and the second flattening part (4) respectively comprise a first support (21) and a second support (42), and the second pressing block (312) is respectively arranged on the first support (21) and the second support (42).

9. The flattening mechanism of claim 8, wherein, The first support (21) and the second support (42) are respectively provided with a first telescopic part (34), and the output end of the telescopic part is fixed to the first pressing block (311).

10. A cylindrical battery production apparatus characterized by comprising: The flattening mechanism is arranged on the cylindrical battery, and the shaping pressure head (3) acts on the tab of the cylindrical battery.

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