Diaphragm shaping mechanism and shaping device

Abstract

The utility model relates to the technical field of battery cell production, and particularly discloses a diaphragm shaping mechanism and a shaping device. The diaphragm shaping mechanism comprises a first pressing cutter, a first driving part, a second pressing cutter and a second driving part, the output end of the first driving part is connected with the first pressing knife and is used for driving the first pressing knife to move along a first direction so as to abut against one side of a battery cell; and the output end of the second driving part is connected with the second pressing knife and is used for driving the second pressing knife to move along the first direction so as to abut against the other side of the battery cell. In the scheme, the first pressing knife and the second pressing knife are respectively driven by the first driving piece and the second driving piece, so that the pressure applied to the two sides of the battery cell by the first pressing knife and the second pressing knife can be independently controlled, the diaphragm shaping effect and precision on the two sides of the battery cell are improved, and the risk that the battery cell is damaged due to overlarge single-side pressure is reduced.

Description

A diaphragm shaping mechanism and shaping device Technical Field

[0001] This application relates to the field of battery cell manufacturing technology, and in particular to a diaphragm shaping mechanism and shaping device. Background Technology

[0002] After the cells are stacked, they need to be assembled into the housing. After the cells are installed, the diaphragm at the edge of the cells will protrude from the overall cells. Therefore, this part of the diaphragm needs to be shaped to prevent the diaphragm at the edge of the cells from curling up or covering the edge of the housing, which could lead to electrolyte leakage, short circuit risk, and poor welding, thus affecting the sealing and safety of the cells.

[0003] Existing methods for diaphragm shaping typically involve pressing the end face of the battery cell together using a pressing block. Since the diaphragm on multiple edges of the battery cell needs to be shaped, the pressing block must cover the entire end face of the battery cell. However, in practical applications, the pressing block is inevitably affected by factors such as manufacturing precision errors and mechanical installation errors, resulting in misalignment. This leads to inconsistent shaping effects on different edges of the battery cell during pressing and a high risk of damaging the battery cell. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a diaphragm shaping mechanism and shaping device to solve the problems of poor shaping effect and high risk of cell damage in existing diaphragm shaping methods.

[0005] To achieve the above-mentioned technical objectives, the first aspect of this application provides a diaphragm shaping mechanism, comprising: a first pressing knife, a first driving member, a second pressing knife, and a second driving member;

[0006] The output end of the first driving member is connected to the first pressing knife, which is used to drive the first pressing knife to move along the first direction to the side of the battery cell to press the diaphragm on the battery cell.

[0007] The output end of the second driving member is connected to the second pressing knife, which is used to drive the second pressing knife to move along the first direction to press the diaphragm on the battery cell against the other side of the battery cell.

[0008] Furthermore, it also includes positioning blocks;

[0009] The output end of the first driving member is connected to the positioning block, and is used to drive the positioning block to move along the first direction to abut against the end face of the battery cell.

[0010] Furthermore, it also includes a controller;

[0011] The controller is electrically connected to the first drive unit and the second drive unit;

[0012] The controller is used to control the second drive unit to start after the positioning block abuts against the end face of the battery cell.

[0013] Furthermore, it also includes a controller;

[0014] The controller is electrically connected to the first drive unit and the second drive unit;

[0015] The controller is used to control the start and stop of the first driving member and the second driving member, so as to control the positioning block and the second pressing knife to simultaneously abut against the battery cell.

[0016] Furthermore, protrusions are provided on the first pressing knife and the second pressing knife;

[0017] When the first pressing blade and the second pressing blade abut against the battery cell, the protrusion extends into the side of the battery cell.

[0018] Furthermore, the distal end of the protrusion is a pointed tip.

[0019] Furthermore, the protrusions are provided on multiple sides of the first pressing knife and multiple sides of the second pressing knife.

[0020] Furthermore, it includes: a support frame and a third drive component;

[0021] The first pressing knife, the first driving member, the second pressing knife, and the second driving member are disposed on the support frame;

[0022] The output end of the third driving component is connected to the support frame and is used to drive the support frame to move along the second direction;

[0023] The second direction is perpendicular to the first direction.

[0024] A second aspect of this application provides a shaping device, comprising: a feeding mechanism, a conveying mechanism, and a diaphragm shaping mechanism as described in any one of claims;

[0025] The feeding mechanism is used to transfer the battery cells after they have been inserted into the casing to the conveying mechanism;

[0026] The conveying mechanism is used to convey the battery cell to the diaphragm shaping mechanism for diaphragm shaping process.

[0027] Furthermore, it also includes: insulation cap testing institutions and CCD testing institutions;

[0028] The conveying mechanism is also used to convey the battery cell before it undergoes the diaphragm shaping process to the insulation cap testing mechanism for insulation cap testing.

[0029] The conveying mechanism is also used to convey the battery cell after the diaphragm shaping process to the CCD inspection mechanism for testing the diaphragm shaping effect.

[0030] As can be seen from the above technical solutions, this application provides a diaphragm shaping mechanism and a shaping device; wherein, the diaphragm shaping mechanism includes: a first pressing knife, a first driving member, a second pressing knife and a second driving member; the output end of the first driving member is connected to the first pressing knife, and is used to drive the first pressing knife to move along a first direction and abut against one side of the battery cell; the output end of the second driving member is connected to the second pressing knife, and is used to drive the second pressing knife to move along the first direction and abut against the other side of the battery cell.

[0031] In this scheme, the first pressing knife and the second pressing knife are driven by the first driving member and the second driving member, respectively, so that the pressure applied by the first pressing knife and the second pressing knife to both sides of the cell can be independently controlled, thereby improving the effect and accuracy of diaphragm shaping on both sides of the cell and reducing the risk of damaging the cell due to excessive pressure on one side. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 is a schematic diagram of a diaphragm shaping mechanism provided in an embodiment of this application;

[0034] Figure 2 is a schematic diagram of the four sides of a battery cell provided by a diaphragm shaping mechanism according to an embodiment of this application;

[0035] Figure 3 is a bottom view of the first pressing knife of a diaphragm shaping mechanism provided in an embodiment of this application;

[0036] Figure 4 is a side view of a shaping device provided in an embodiment of this application;

[0037] Figure 5 is a perspective view of a shaping device provided in an embodiment of this application;

[0038] In the diagram: 1. First pressing blade; 2. First driving component; 3. Second pressing blade; 4. Second driving component; 5. Positioning block; 6. Protruding block; 7. Support frame; 8. Third driving component; 10. Feeding mechanism; 20. Conveying mechanism; 30. Insulating cap detection mechanism; 40. Detection mechanism;

[0039] X-axis direction: first direction; Y-axis direction: second direction. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0041] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0043] Please refer to Figure 1. In the first aspect of this application embodiment, a diaphragm shaping mechanism is provided, including: a first pressing knife 1, a first driving member 2, a second pressing knife 3, and a second driving member 4.

[0044] The output end of the first driving member 2 is connected to the first pressing knife 1, which is used to drive the first pressing knife 1 to move along the first direction and abut against one side of the battery cell; the output end of the second driving member 4 is connected to the second pressing knife 3, which is used to drive the second pressing knife 3 to move along the first direction and abut against the other side of the battery cell.

[0045] In the embodiments provided in this application, taking the cell located below the diaphragm shaping mechanism during the diaphragm shaping process as an example, the first direction can be the vertical direction, as shown by the X-axis direction in Figure 1.

[0046] When the first pressing knife 1 abuts against one side of the battery cell, the first pressing knife 1 can press and shape the diaphragm on one side of the battery cell; when the second pressing knife 3 abuts against the other side of the battery cell, the second pressing knife 3 presses and shapes the diaphragm on the other side of the battery cell.

[0047] In practical applications, when the first pressing blade 1 and the second pressing blade 3 are integral structures, due to mechanical errors, it is difficult for the first pressing blade 1 and the second pressing blade 3 to be completely parallel to the end face of the battery cell, so that they can simultaneously contact both sides of the battery cell during pressing. Therefore, under the drive of the same driving component, the forces on both sides of the battery cell are inconsistent. This inconsistency...

[0048] In this solution, since the first pressing blade 1 and the second pressing blade 3 are independently controlled by the first driving component 2 and the second driving component 4, the pressing force and pressing position of the two pressing blades can be adjusted more precisely. This avoids the situation where the forces on both sides are inconsistent when the first pressing blade 1 and the second pressing blade 3 are integral structures. It can improve the shaping accuracy and consistency of the battery cell separator, reduce the risk of battery cell damage, and ensure the sealing and safety of the battery cell.

[0049] It should be noted that the positional relationship between the first pressing blade 1 and the second pressing blade 3 is set in practical applications, and technicians can adjust it according to the integration position of the battery cell. For example, the initial positions of the first pressing blade 1 and the second pressing blade 3 can be configured so that they are at the same horizontal height; the distance between the first pressing blade 1 and the second pressing blade 3 is set according to the spacing between the two sides of the battery cell.

[0050] In one embodiment, the first pressing knife 1 can press the separator on one or more sides of the battery cell; the second pressing knife 3 can also press the separator on one or more sides of the battery cell.

[0051] Specifically, as shown in Figure 3, in the top view of the battery cell, the battery cell can include four sides, a, b, c and d, in a clockwise direction.

[0052] In one implementation, the first pressing knife 1 can press the diaphragms on sides a and b when it abuts against the battery cell, and the second pressing knife 3 can press the diaphragms on sides c and d when it abuts against the battery cell.

[0053] In another implementation, when the first pressing knife 1 abuts against the battery cell, it can press the diaphragm on side a, and when the second pressing knife 3 abuts against the battery cell, it can press the diaphragms on sides b, c, and d.

[0054] It should be noted that there are tabs connected to the battery cell; the first pressing blade 1 and the second pressing blade 3 are configured to avoid the position of the tabs.

[0055] In one embodiment, pressure sensors can be provided at the output ends of both the first driving member 2 and the second driving member 4 to measure their output pressure. The measured output pressure values ​​are then sent to the controller for start / stop control of the first driving member 2 and the second driving member 4, ensuring the pressure control progress of the pressing process. The method of measuring the output pressure values ​​of the first driving member 2 and the second driving member 4 using pressure sensors is existing technology and will not be described in detail in this embodiment. In this embodiment, the controller can adjust the pressing pressure value and pressing time of the first pressing blade 1 and the second pressing blade 3 respectively, providing differentiated processing for different sides of the battery cell.

[0056] In one embodiment, the output ends of the first driving member 2 and the second driving member 4 can be connected to the first pressing knife 1 and the second pressing knife 3 respectively through a damper, and the damper plays a buffering role.

[0057] In one embodiment, a positioning block 5 is also included; the output end of the first driving member 2 is connected to the positioning block 5, and is used to drive the positioning block 5 to move along a first direction to abut against the end face of the battery cell.

[0058] When the first driving member 2 drives the first pressing knife 1 to press down, it simultaneously drives the positioning block 5 to press down. Furthermore, in this embodiment, the positioning block 5 is configured to simultaneously abut against the battery cell with the first pressing knife 1. When the first pressing knife 1 and the second pressing knife 3 press the diaphragm at the edge of the battery cell, the positioning block 5 can abut against the end face of the battery cell to fix the battery cell, improving the stability during the diaphragm shaping process and preventing battery cell displacement.

[0059] In one embodiment, referring to Figures 1 and 3, a protrusion 6 is provided on the first pressing knife 1 and the second pressing knife 3; when the first pressing knife 1 and the second pressing knife 3 abut against the battery cell, the protrusion 6 extends into the side of the battery cell.

[0060] When the first pressing blade 1 and the second pressing blade 3 press the end face of the battery cell, the protrusion 6 can extend into the side of the battery cell, specifically between the battery cell and the housing, so as to press the top of the side of the battery cell at the same time during pressing, ensuring that the first pressing blade 1 and the second pressing blade 3 cover the upper surface edge of the battery cell, thereby improving the pressing and shaping effect.

[0061] In a further improved embodiment, the distal end of the protrusion 6 is a pointed tip, facilitating its insertion between the battery cell and the housing. The distal end of the protrusion 6 refers to the end that is perpendicular to either the first pressing blade 1 or the second pressing blade 3.

[0062] In one embodiment, protrusions 6 are provided on multiple sides of the first pressing knife 1 and multiple sides of the second pressing knife 3, so that the protrusions 6 can extend into multiple sides of the battery cell.

[0063] In one embodiment, a controller is also included; the controller is electrically connected to the first drive member 2 and the second drive member 4; the controller is used to control the start and stop of the first drive member 2 and the second drive member 4 so as to control the positioning block 5 and the second pressing knife 3 to simultaneously abut against the battery cell.

[0064] Specifically, because the second pressing blade 3 is provided with a protrusion 6, during the pressing process of the first pressing blade 1 and the second pressing blade 3, the protrusion 6 will first extend into the side of the battery cell, and then the first pressing blade 1 and the second pressing blade 3 will abut against the end face of the battery cell. If the lower end face of the protrusion 6 is flush with the positioning block 5, and the output power of the second driving member 4 is lower than the output power of the first driving member 2, and if the first driving member 2 and the second driving member 4 are activated simultaneously, the positioning block 5 will abut against the end face of the battery cell before the second pressing blade 3.

[0065] In this embodiment, the controller can balance the height difference between the protrusion 6 and the positioning block 5 during installation, the power difference between the first driving member 2 and the second driving member 4, etc., so that the positioning block 5 and the second pressing knife 3 simultaneously abut against the battery cell. Since the positioning block 5 and the first pressing knife 1 are both located at the output end of the first driving member 2, in this embodiment, the first pressing knife 1, the second pressing knife 3 and the positioning block 5 can all simultaneously abut against the end face of the battery cell to achieve the fixation of the battery cell and the shaping of the diaphragm, ensuring the shaping efficiency.

[0066] In another embodiment, the controller is used to control the second drive unit 4 to start after the positioning block 5 abuts against the end face of the battery cell.

[0067] In this embodiment, the second driving member 4 is configured such that after the first pressing knife 1 and the positioning block 5 fix the battery cell, the second driving member 4 then starts to control the second pressing knife 3 to press it. This can reduce the impact force of pressing on the battery cell and reduce the risk of excessive local stress caused by the slight displacement of the battery cell when the first pressing knife 1 and the second pressing knife 3 are pressed down.

[0068] In one embodiment, the system includes: a support frame 7 and a third driving member 8; a first pressing knife 1, a first driving member 2, a second pressing knife 3, and a second driving member 4 are disposed on the support frame 7; the output end of the third driving member 8 is connected to the support frame 7 and is used to drive the support frame 7 to move along a second direction; the second direction is perpendicular to the first direction. Corresponding to the first direction being a vertical direction, the second direction can be a horizontal direction, as shown by the Y-axis direction in Figure 1.

[0069] In one embodiment, the first driving member 2 and the second driving member 4 can be cylinders; the support frame 7 can be provided with a track for sliding connection between the first pressing knife 1 and the second pressing knife 3.

[0070] In this embodiment, the third driving member 8 can move horizontally in practical applications to adjust the position of the first pressing knife 1 and the second pressing knife 3 relative to the battery cell, ensuring the accuracy of alignment with the battery cell.

[0071] Please refer to Figures 1 to 5. A second aspect of this application provides a shaping apparatus, including: a feeding mechanism 10, a conveying mechanism 20, and a diaphragm shaping mechanism of any one of the above; the feeding mechanism 10 is used to transfer the battery cell after it has been installed in the casing to the conveying mechanism 20; the conveying mechanism 20 is used to convey the battery cell to the diaphragm shaping mechanism for diaphragm shaping process.

[0072] In application, the feeding mechanism 10 can be a multi-axis movable robotic arm structure, capable of gripping the battery cells after they have been encased in the casing from the previous station and then placing the battery cells on the conveying mechanism 20. In this embodiment, the conveying mechanism 20 can include a front conveying mechanism and a rear conveying mechanism; the front conveying mechanism and the rear conveying mechanism are located on the left and right sides of the diaphragm shaping mechanism in Figure 4, respectively. The feeding mechanism 10 can first grip the battery cells after they have been encased in the casing onto the front conveying mechanism, and then the front conveying mechanism can transfer them to the rear conveying mechanism, and the rear conveying mechanism can transfer them to the diaphragm shaping mechanism for diaphragm shaping, while the front conveying mechanism can be reset to obtain the material for the next operation.

[0073] In a more specific embodiment, it also includes: an insulating cap detection mechanism 30 and a CCD detection mechanism 40; the conveying mechanism 20 is also used to convey the battery cell before the diaphragm shaping process to the insulating cap detection mechanism 30 for insulating cap detection; the conveying mechanism 20 is also used to convey the battery cell after the diaphragm shaping process to the CCD detection mechanism 40 for detecting the diaphragm shaping effect.

[0074] In this embodiment, the feeding mechanism 10, the conveying mechanism 20, the diaphragm shaping mechanism, the insulating cap detection mechanism 30, and the CCD detection mechanism 40 can all be mounted on the same main body of the equipment.

[0075] During operation, after the battery cell is loaded into the casing by the conveying mechanism 20, it can transport the battery cell to the insulation cap inspection mechanism 30 for insulation cap inspection. Specifically, the aforementioned front-end conveying mechanism can transport the material to the bottom of the insulation cap inspection mechanism 30 for inspection to check the quality of the insulation cap before diaphragm shaping. After passing the inspection, the material is transferred by the conveying mechanism 20 to the bottom of the diaphragm shaping mechanism for diaphragm shaping. Specifically, the aforementioned rear-end conveying mechanism can receive the material from the front-end conveying mechanism and transfer the material to the bottom of the diaphragm shaping mechanism. After diaphragm shaping, the rear-end conveying mechanism transports the material to the bottom of the CCD inspection mechanism 40 to check the effect of diaphragm shaping in order to control the quality of the battery cell.

[0076] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A diaphragm shaping mechanism, characterized in that, include: The first pressing knife (1), the first driving member (2), the second pressing knife (3), and the second driving member (4) are connected to the first pressing knife (1) at the output end, and are used to drive the first pressing knife (1) to move along the first direction to one side of the battery cell to press the diaphragm on the battery cell; the output end of the second driving member (4) is connected to the second pressing knife (3), and are used to drive the second pressing knife (3) to move along the first direction to the other side of the battery cell to press the diaphragm on the battery cell.

2. The diaphragm shaping mechanism according to claim 1, characterized in that, It also includes a positioning block (5); the output end of the first driving member (2) is connected to the positioning block (5) for driving the positioning block (5) to move along the first direction to abut against the end face of the battery cell.

3. The diaphragm shaping mechanism according to claim 2, characterized in that, The first pressing knife (1) and the second pressing knife (3) are provided with protrusions (6); when the first pressing knife (1) and the second pressing knife (3) abut against the battery cell, the protrusions (6) extend into the side of the battery cell.

4. The diaphragm shaping mechanism according to claim 3, characterized in that, The distal end of the protrusion (6) is a pointed tip.

5. The diaphragm shaping mechanism according to claim 3 or 4, characterized in that, The protrusions (6) are provided on multiple sides of the first pressing knife (1) and multiple sides of the second pressing knife (3).

6. The diaphragm shaping mechanism according to claim 3, characterized in that, It also includes a controller; the controller is electrically connected to the first drive unit (2) and the second drive unit (4); the controller is used to control the start and stop of the first drive unit (2) and the second drive unit (4) so ​​as to control the positioning block (5) and the second pressing knife (3) to simultaneously abut the battery cell.

7. The diaphragm shaping mechanism according to any one of claims 2 to 4, characterized in that, It also includes a controller; the controller is electrically connected to the first drive unit (2) and the second drive unit (4); the controller is used to control the second drive unit (4) to start after the positioning block (5) abuts against the end face of the battery cell.

8. The diaphragm shaping mechanism according to claim 1, characterized in that, include: Support frame (7) and third drive member (8); first pressure knife (1), first drive member (2), second pressure knife (3) and second drive member (4) are disposed on the support frame (7); the output end of the third drive member (8) is connected to the support frame (7) and is used to drive the support frame (7) to move along the second direction; the second direction is perpendicular to the first direction.

9. A shaping device, characterized in that, include: The feeding mechanism (10), the conveying mechanism (20), and the diaphragm shaping mechanism according to any one of claims 1-8; the feeding mechanism (10) is used to transfer the battery cell after it has been installed in the casing to the conveying mechanism (20); the conveying mechanism (20) is used to convey the battery cell to the diaphragm shaping mechanism for diaphragm shaping process.

10. The shaping device according to claim 9, characterized in that, Also includes: The insulation cap testing mechanism (30) and the CCD testing mechanism (40) are provided; the conveying mechanism (20) is also used to convey the battery cell before the diaphragm shaping process to the insulation cap testing mechanism (30) for insulation cap testing; the conveying mechanism (20) is also used to convey the battery cell after the diaphragm shaping process to the CCD testing mechanism (40) for testing the diaphragm shaping effect.

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