Soft package battery cell tab bending mechanism

Abstract

The utility model provides a soft package battery cell tab bending mechanism which comprises a machine frame, a positioning placing base and a guide column are arranged on the machine frame, the guide column is arranged in the vertical direction, a lifting block is connected to the guide column in a sliding mode, and a stamping driving piece used for driving the lifting block to move up and down is arranged on the machine frame. A bending upper cutting die is arranged at the lower end of the lifting block, a bending lower cutting die is arranged on the machine frame, and the bending lower cutting die is correspondingly arranged below the bending upper cutting die. A fixed block is arranged on the lifting block, a movable block is connected below the fixed block, and the movable block and the fixed block are connected through an elastic connecting mechanism; and a pre-pressing block is arranged below the movable block. According to the utility model, the problems of uneven bending lines and poorer product consistency in the traditional manual bending are solved; the edge sealing part, close to the tab, of the soft package battery cell is firstly pressed by the pre-pressing block, so that the edge sealing part of the soft package battery cell is prevented from being greatly pulled by the tab in the bending process, and the edge sealing part of the soft package battery cell is prevented from being torn to generate a liquid leakage risk.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery core processing, in particular to a soft-pack battery core ear bending mechanism. Background Art

[0002] With the development of battery technology, the power of battery cells is getting bigger and bigger. The tabs of soft-pack battery cells are usually divided into copper tabs and aluminum tabs, and the thickness is mostly between 0.2 and 0.3 mm. In the production process of battery cell modules, due to the thin thickness of soft-pack battery cells, there will be insufficient space for high-voltage connection, so the tabs need to be bent in advance to facilitate connection with wires or circuit boards.

[0003] Traditional tab bending methods are mainly divided into manual bending and machine bending. Among them, manual bending is limited by the technical level of the operator, and there are problems such as uneven bending lines, uncontrollable bending angles, and poor product consistency; while traditional machine bending is to first fix the soft-pack battery cell, and then use a knife die to stamp and bend the tab. During the bending process, the tab will be subjected to pulling force. After the tab is subjected to force, it is easy for the soft-pack battery cell to be torn near the tab and cause the risk of leakage. Summary of the invention

[0004] The utility model aims to solve the deficiencies in the prior art and provide a soft-pack battery cell tab bending mechanism.

[0005] The purpose of the utility model is achieved through the following technical solutions: a soft-pack battery cell tab bending mechanism, comprising a frame, a positioning seat and a guide column are provided on the frame, the guide column is arranged along the vertical direction, a lifting block is slidably connected to the guide column, and a stamping drive member for driving the lifting block to move up and down is provided on the frame; a bending upper die is provided at the lower end of the lifting block, a bending lower die is provided on the frame, and the bending lower die is correspondingly arranged below the bending upper die;

[0006] A fixed block is provided on the lifting block, a movable block is connected below the fixed block, and the movable block and the fixed block are connected via an elastic connection mechanism; a pre-pressing block is provided below the movable block;

[0007] When the tab of the soft-pack battery cell is bent, the pre-pressing block presses the sealed edge of the soft-pack battery cell close to the tab.

[0008] When the utility model bends the soft-pack battery cell, the soft-pack battery cell is first placed on the positioning seat so that the pole ear of the soft-pack battery cell is located between the upper bending die and the lower bending die; the lifting block is driven downward by the stamping drive member, and during the downward movement of the lifting block, the pre-pressing block first presses the edge sealing part of the soft-pack battery cell close to the pole ear, and then the pole ear is bent under the stamping of the upper bending die; after the pole ear is bent, the lifting block moves up and resets. The utility model solves the problems of uneven bending lines, uncontrollable bending angles, and poor product consistency in traditional manual bending, and during the bending process, the pre-pressing block first presses the edge sealing part of the soft-pack battery cell close to the pole ear, thereby avoiding the pole ear from causing a large pull on the edge sealing part of the soft-pack battery cell during the bending process, and preventing the edge sealing part of the soft-pack battery cell from being torn and causing the risk of leakage.

[0009] Preferably, the pre-pressing block is made of rubber.

[0010] Preferably, the upper surface of the positioning and placement seat is a placement surface, and a positioning component for positioning the soft-pack battery cell is provided on the placement surface.

[0011] Preferably, the positioning component includes a first axial positioning block, a second axial positioning block, and a lateral positioning block, wherein the first axial positioning block and the second axial positioning block are respectively arranged at both ends of the placement surface; and the lateral positioning blocks are respectively arranged at both sides of the placement surface. The soft-pack battery cell is placed in the area surrounded by the first axial positioning block, the second axial positioning block, and the lateral positioning block.

[0012] Preferably, the placement surface is inclined, and the angle between the placement surface and the horizontal plane is 30°. The inclination angle of the placement surface can be set according to actual needs, and the inclination angle of the placement surface can also be 10°, 20°, 40° or other angle values.

[0013] Preferably, the stamping drive member is a cylinder.

[0014] Preferably, the elastic connection mechanism includes a spring, a guide rod fixed on the movable block, a guide hole arranged on the fixed block and corresponding to the guide rod, the guide rod passes through the guide hole, and the guide rod is parallel to the guide column; the spring is arranged between the fixed block and the movable block.

[0015] The beneficial effects of the utility model are as follows: the utility model solves the problems of uneven bending lines, uncontrollable bending angles and poor product consistency in traditional manual bending, and in the bending process, the edge sealing of the soft-pack battery cell close to the pole ear is first pressed by the pre-pressing block, thereby avoiding the pole ear from causing a large pulling on the edge sealing of the soft-pack battery cell during the bending process, preventing the edge sealing of the soft-pack battery cell from being torn and causing the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0018] Figure 3 It is a schematic diagram of the structure of the lower bending die and the upper bending die.

[0019] Figure 4 It is a schematic diagram of the utility model when bending the pole ear of the soft-pack battery cell.

[0020] Figure 5 This is a schematic diagram of the tabs of the soft-pack battery cell after bending.

[0021] In the figure: 1. frame, 2. positioning seat, 3. placement surface, 4. first axial positioning block, 5. lateral positioning block, 6. second axial positioning block, 7. guide column, 8. lifting block, 9. stamping drive part, 10. bending upper cutting die, 11. bending lower cutting die, 12. fixed block, 13. movable block, 14. pre-pressing block, 15. guide rod, 16. spring, 17. battery cell, 18. pole ear. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, a soft-pack battery cell tab bending mechanism includes a frame 1, a positioning seat 2 and a guide column 7 are provided on the frame 1, the guide column 7 is arranged along the vertical direction, and a lifting block 8 is slidably connected to the guide column 7, and the lifting block 8 can move up and down along the guide column 7. A stamping drive member 9 for driving the lifting block 8 to move up and down is provided on the frame 1. In this embodiment, the stamping drive member 9 is a cylinder, which is arranged at the top of the frame 1, and the lifting block 8 is connected to the piston rod of the cylinder.

[0024] A bending upper cutting die 10 is provided at the lower end of the lifting block 8 , and a bending lower cutting die 11 is provided on the frame 1 . The bending lower cutting die 11 is correspondingly arranged below the bending upper cutting die 10 .

[0025] The lifting block 8 is provided with a fixed block 12, and a movable block 13 is connected below the fixed block 12. The movable block 13 is connected to the fixed block 12 through an elastic connection mechanism. The elastic connection mechanism includes a spring 16, a guide rod 15 fixedly arranged on the movable block 13, and a guide hole arranged on the fixed block 12 and corresponding to the guide rod 15. The guide rod 15 passes through the guide hole, and the guide rod 15 is parallel to the guide column 7. The spring 16 is arranged between the fixed block 12 and the movable block 13, and the spring 16 is sleeved on the guide rod 15.

[0026] A pre-pressing block 14 is provided below the movable block 13. In this embodiment, the pre-pressing block 14 is made of rubber. When the tab 18 of the soft-pack battery cell 17 is bent, the pre-pressing block 14 presses the sealing edge of the soft-pack battery cell 17 near the tab 18.

[0027] The upper surface of the positioning and placing seat 2 is a placing surface 3, and a positioning component for positioning the soft-pack battery cell 17 is provided on the placing surface 3. The positioning component includes a first axial positioning block 4, a second axial positioning block 6, and a lateral positioning block 5. The first axial positioning block 4 and the second axial positioning block 6 are respectively arranged at both ends of the placing surface 3; the lateral positioning blocks 5 are respectively arranged on both sides of the placing surface 3. The soft-pack battery cell 17 is placed in the area surrounded by the first axial positioning block 4, the second axial positioning block 6, and the lateral positioning block 5.

[0028] Furthermore, the placement surface 3 is inclined. The inclination angle of the placement surface 3 can be set according to actual needs; in this embodiment, the angle between the placement surface 3 and the horizontal plane is 30°. The inclination angle of the placement surface 3 can also be 10°, 20°, 40° or other angle values.

[0029] When the soft-pack battery cell 17 is bent, the soft-pack battery cell 17 is first placed on the positioning seat 2 so that the pole ear 18 of the soft-pack battery cell 17 is located between the upper bending die 10 and the lower bending die 11; the lifting block 8 is driven downward by the stamping drive member 9. During the downward movement of the lifting block 8, the pre-pressing block 14 first presses the edge of the soft-pack battery cell 17 near the pole ear 18, and then the pole ear 18 is bent under the stamping of the upper bending die 10. After being bent, the pole ear 18 of the soft-pack battery cell is as follows Figure 5 As shown; after the pole ear 18 is bent, the lifting block 8 moves up and resets. The utility model solves the problems of uneven bending line, uncontrollable bending angle and poor product consistency in traditional manual bending, and in the bending process, the pre-pressing block 14 first presses the edge of the soft-pack battery 17 close to the pole ear 18, so as to avoid the pole ear 18 causing a large pulling on the edge of the soft-pack battery 17 during the bending process, and prevents the edge of the soft-pack battery 17 from being torn and causing the risk of leakage.

[0030] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A soft-pack battery cell tab bending mechanism, characterized in that: The machine comprises a frame, a positioning seat and a guide column are arranged on the frame, the guide column is arranged in the vertical direction, a lifting block is slidably connected to the guide column, and a stamping driving member for driving the lifting block to move up and down is arranged on the frame; an upper bending die is arranged at the lower end of the lifting block, and a lower bending die is arranged on the frame, and the lower bending die is arranged correspondingly below the upper bending die; A fixed block is provided on the lifting block, a movable block is connected below the fixed block, and the movable block and the fixed block are connected via an elastic connection mechanism; a pre-pressing block is provided below the movable block; When the tab of the soft-pack battery cell is bent, the pre-pressing block presses the sealed edge of the soft-pack battery cell close to the tab.

2. A soft-pack battery cell tab bending mechanism according to claim 1, characterized in that: The pre-pressing block is made of rubber.

3. The soft-pack battery cell tab bending mechanism according to claim 1, characterized in that: The upper surface of the positioning and placing seat is a placing surface, and a positioning component for positioning the soft-pack battery cell is arranged on the placing surface.

4. A soft-pack battery cell tab bending mechanism according to claim 3, characterized in that: The positioning component comprises a first axial positioning block, a second axial positioning block and a lateral positioning block. The first axial positioning block and the second axial positioning block are respectively arranged at two ends of the placement surface; and the lateral positioning blocks are respectively arranged at two sides of the placement surface.

5. The soft-pack battery cell tab bending mechanism according to claim 3, characterized in that: The placement surface is inclined, and the angle between the placement surface and the horizontal plane is 30°.

6. The soft-pack battery cell tab bending mechanism according to claim 1, characterized in that: The punching driving member is a cylinder.

7. A soft-pack battery cell tab bending mechanism according to any one of claims 1 to 6, characterized in that: The elastic connection mechanism includes a spring, a guide rod fixedly arranged on the movable block, and a guide hole arranged on the fixed block and corresponding to the guide rod, the guide rod passes through the guide hole, and the guide rod is parallel to the guide column; The spring is arranged between the fixed block and the movable block.

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