Pole piece cutter capable of preventing powder from falling on cut surface

Abstract

The utility model relates to the technical field of battery processing, in particular to a pole piece cutter capable of preventing powder from falling on a cut surface. The utility model provides a pole piece cutter capable of preventing powder from falling on a cut surface, which comprises a base and a mounting shell, the mounting shell is mounted at the top of the base, the pole piece cutter also comprises a connecting plate, two upper cutters and a lower cutter, the connecting plate is arranged at the upper part of the mounting shell in a sliding manner, the two upper cutters are mounted at the bottom of the connecting plate, and a guide groove is formed in the lower part of the mounting shell; and a lower cutter is arranged in the guide groove in a sliding manner. An electrode slice is placed between an upper cutter and a lower cutter, then a cylinder is started, so that the upper cutter and the lower cutter move oppositely to extrude the electrode slice into three sections, the middle section is waste, the middle section is extruded to the position between the two upper cutters, meanwhile, under the combined action of the three cutters, floating powder can exist at the two ends of the waste, and the other two sections are normal electrode slices. And no dust exists on the end face, so that the diaphragm is effectively prevented from being punctured by pole piece burrs and dust when the battery is wound, and the safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a pole piece cutter capable of preventing powder from falling off a cut surface. Background Art

[0002] During the production process of the electrode sheet of the lithium-ion battery, the coil needs to be cut to make a single electrode sheet. The existing cutter uses two upper and lower cutters to squeeze the electrode sheet through overlap to achieve cutting.

[0003] When the electrode is cut by squeezing with two blades, it is easy to cause powder and burrs on the cross section of the electrode. When the electrode is divided into two, one end of the electrode will be relatively clean, while the other end will have floating powder and burrs. If the fallen dust is not cleaned up, the burrs and dust on the edge of the electrode may pierce the diaphragm when the battery is wound and stacked, causing an internal short circuit in the battery, which can easily cause the battery voltage to drop too fast, or even cause a safety accident of battery combustion.

[0004] Therefore, it is necessary to design a pole piece cutter that can prevent powder from falling off the cut surface. Utility Model Content

[0005] In order to overcome the disadvantage that when the pole piece is cut by squeezing two blades, floating powder and burrs will be generated at one end of the pole piece. If the fallen dust is not cleaned up, the burrs and dust on the edge of the pole piece may pierce the diaphragm when the battery is wound and stacked, causing an internal short circuit in the battery, which can easily cause the battery voltage to drop too quickly and even cause a safety accident of battery combustion. The technical problem to be solved is to provide a pole piece cutter that can prevent powder from falling on the cut surface.

[0006] The technical scheme of the utility model is: a pole piece cutter for preventing powder from falling off on the cut surface, comprising a base and a mounting shell, the mounting shell being mounted on the top of the base, and also comprising a connecting plate, an upper cutter, a lower cutter and a driving component, a connecting plate being slidably arranged on the upper part of the mounting shell, two upper cutters being mounted on the bottom of the connecting plate, a guide groove being opened on the lower part of the mounting shell, a lower cutter being slidably arranged in the guide groove, the lower cutter slidingly contacts with the two upper cutters, and a driving component for driving the upper cutter and the lower cutter to slide towards each other is arranged on the mounting shell.

[0007] In one embodiment, the driving assembly includes a rotating shaft, a gear, a first rack, a second rack, a first slider, a support seat, a cylinder and a connecting rod. The rotating shaft is rotatably arranged on the left part of the mounting shell, a gear is fixedly connected to the rotating shaft, a first rack is fixedly connected to the right side of the lower cutter, a S-shaped groove is provided on the left side of the mounting shell, a first slider is slidably arranged in the S-shaped groove, a side of the first slider located in the mounting shell is fixedly connected to the second rack, the first rack and the second rack are both meshed with the gear, a connecting rod is fixedly connected between the second rack and the connecting plate, a support seat is installed on the upper part of the mounting shell, a cylinder is installed on the support seat, and the telescopic rod of the cylinder is connected to the first slider.

[0008] In one of the embodiments, it also includes a second slider, a first conveying roller and a second conveying roller. Two slide grooves are provided on the left and right sides of the mounting shell. The second slider is slidably arranged in the slide groove. The first conveying roller is rotatably arranged on the two second sliders located on the left and right sides of the mounting shell. The second conveying roller is rotatably arranged on the left and right sides of the mounting shell. The first conveying roller is located above the second conveying roller.

[0009] In one embodiment, it further includes guide rods, two guide rods are fixedly connected to the left and right sides of the installation shell, and the connecting plate is slidably connected to the guide rods on the left and right sides of the installation shell.

[0010] In one of the embodiments, a material return rod is further included. The material return rod is installed inside the mounting shell and is located between the two upper cutters.

[0011] In one of the embodiments, an elastic member is further included, and the elastic member is connected between the slide groove and the second sliding block.

[0012] In one embodiment, the lower end of the upper cutting knife is flush with the lower end of the ejector rod.

[0013] The beneficial effects are: 1. By placing the electrode sheet between the upper cutter and the lower cutter, and then starting the cylinder, the upper cutter and the lower cutter move toward each other to squeeze the electrode sheet into three sections, the middle section is waste, and the middle section waste is squeezed between the two upper cutters. At the same time, under the joint action of the three cutters, there will be floating powder at both ends of the waste, while the other two sections are normal pole sheets, and there will be no dust on the end faces, thereby effectively avoiding the pole sheet burrs and dust from piercing the diaphragm when the battery is wound, thereby improving the safety of the battery.

[0014] 2. By passing through the gap between the first conveyor roller and the second conveyor roller, the two first conveyor rollers and the two second conveyor rollers cooperate with each other under the action of the elastic member to clamp the two ends of the electrode sheet, so that the electrode sheet remains straightened during cutting, preventing the electrode sheet from being squeezed and bent during cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the installation shell, the first sliding block and the connecting rod of the utility model.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the lower cutter, rotating shaft and gear of the utility model.

[0018] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the installation shell and the material ejection rod of the utility model.

[0019] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the installation shell, the connecting plate and the upper cutter of the utility model.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the connecting plate, the upper cutter and the lower cutter of the utility model.

[0021] Figure 7 It is a three-dimensional cross-sectional structural schematic diagram of the installation shell, the second sliding block and the elastic member of the utility model.

[0022] Figure 8 It is a three-dimensional structural schematic diagram of the first conveying roller, the second conveying roller and the elastic member of the utility model.

[0023] In the accompanying drawings: 1-base, 2-mounting shell, 3-guide rod, 4-connecting plate, 5-upper cutter, 6-guide groove, 7-lower cutter, 8-rotating shaft, 9-gear, 10-first rack, 11-slot, 12-second rack, 13-return rod, 14-first slider, 15-support seat, 16-cylinder, 17-connecting rod, 18-slide groove, 19-second slider, 20-first conveying roller, 21-second conveying roller, 22-elastic member. DETAILED DESCRIPTION

[0024] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1: A pole piece cutter for preventing powder from falling off the cut surface, see Figure 1 , Figure 2 , Figure 4-Figure 6As shown, it includes a base 1 and a mounting shell 2, the mounting shell 2 is installed on the top of the base 1, and also includes a connecting plate 4, an upper cutter 5, a lower cutter 7 and a driving assembly. The upper part of the mounting shell 2 is slidably provided with a connecting plate 4, two guide rods 3 are fixedly connected to the left and right sides of the mounting shell 2, and the connecting plate 4 is slidably connected to the guide rods 3 on the left and right sides of the mounting shell 2. The four guide rods 3 are distributed in a rectangular shape on the left and right sides of the connecting plate 4, so that the connecting plate 4 drives the upper cutter 5 to slide straight up and down smoothly. Two upper cutters 5 are installed at the bottom of the connecting plate 4, and a guide groove is opened at the bottom of the mounting shell 2 6. A lower cutter 7 is slidably arranged in the guide groove 6. The lower cutter 7 slides and contacts with the two upper cutters 5. A material return rod 13 is installed inside the mounting shell 2. The material return rod 13 is located between the two upper cutters 5, and the lower end of the upper cutter 5 is flush with the lower end of the material return rod 13. After the lower cutter 7 cooperates with the two upper cutters 5 to cut the electrode sheet, the waste material is located between the two upper cutters 5. When the upper cutter 5 moves upward to reset, the material return rod 13 pushes the waste material between the two upper cutters 5 out. A driving component for driving the upper cutter 5 and the lower cutter 7 to slide toward each other is arranged on the mounting shell 2.

[0026] See also Figure 1-Figure 3 As shown, the driving assembly includes a rotating shaft 8, a gear 9, a first rack 10, a second rack 12, a first slider 14, a support seat 15, a cylinder 16 and a connecting rod 17. The rotating shaft 8 is rotatably arranged on the left part of the mounting shell 2, and the gear 9 is fixedly connected to the rotating shaft 8 by a key connection. The first rack 10 is fixedly connected to the right side of the lower cutter 7 by welding. A slot 11 is provided on the left side of the mounting shell 2, and the first slider 14 is slidably arranged in the slot 11. The second rack 12 is fixedly connected to the right side of the first slider. The first rack 10 and the second rack 12 are both meshed with the gear 9. The connecting rod 17 is fixedly connected between the second rack 12 and the connecting plate 4 by welding. The support seat 15 is installed on the upper part of the mounting shell 2 by bolt connection. The cylinder 16 is installed on the support seat 15 by bolt connection, and the telescopic rod of the cylinder 16 is connected to the first slider 14.

[0027] When the electrode sheet needs to be cut, the electrode sheet is placed between the upper cutter 5 and the lower cutter 7, and then the cylinder 16 is started. The telescopic rod of the cylinder 16 extends to drive the connecting plate 4 and the upper cutter 5 to slide downward. At the same time, the connecting plate 4 drives the second rack 12 to slide downward through the connecting rod 17, and the second rack 12 drives the gear 9 to rotate. The gear 9 drives the lower cutter 7 to slide upward through the first rack 10, so that the upper cutter 5 and the lower cutter 7 move in opposite directions to squeeze the electrode sheet into three sections. The middle section is waste, and the waste in the middle section is squeezed to the two upper Between the cutters 5, under the joint action of the three cutters, there will be floating powder at both ends of the waste, while the other two sections are normal pole pieces, and there will be no dust on the end faces, thereby effectively preventing the pole piece burrs and dust from piercing the diaphragm when the battery is wound, thereby improving the safety of the battery. After the electrode sheet is cut off, the telescopic rod of the control cylinder 16 contracts, so that the connecting plate 4 drives the connecting rod 17, the second rack 12 and the upper cutter 5 to slide upward and reset, and the second rack 12 drives the gear 9 to rotate in the opposite direction, so that the first rack 10 drives the lower cutter 7 to slide downward and reset.

[0028] Example 2: Based on Example 1, refer to Figure 1 and Figure 8 As shown, the second slider 19, the first conveying roller 20 and the second conveying roller 21 are also included. Two slide grooves 18 are provided on the left and right sides of the mounting shell 2. The second slider 19 is slidably arranged in the slide groove 18. The first conveying roller 20 is rotatably arranged on the two second sliders 19 located on the left and right sides of the mounting shell 2. The second conveying roller 21 is rotatably arranged on the left and right sides of the mounting shell 2. The first conveying roller 20 is located above the second conveying roller 21. An elastic member 22 is connected between the slide groove 18 and the second slider 19.

[0029] When the electrode sheet needs to be cut, the first conveyor roller 20 is first pushed upward, and the first conveyor roller 20 drives the second slider 19 to slide upward. The second slider 19 squeezes the elastic member 22 to deform, and then passes through the gap between the first conveyor roller 20 and the second conveyor roller 21. Then the first conveyor roller 20 is released, and the elastic member 22 returns to its original state and drives the first conveyor roller 20 to slide downward, so that the two first conveyor rollers 20 and the two second conveyor rollers 21 cooperate to clamp the two ends of the electrode sheet, so that the electrode sheet remains straightened during cutting, and the electrode sheet is prevented from being squeezed and bent during cutting.

[0030] The above description is only an example of the implementation of the present invention and is not intended to limit the present invention. Any equivalent replacement made within the principle of the present invention shall be included in the protection scope of the present invention. The contents not elaborated in the present invention belong to the existing technology known to the technicians in this professional field.

Claims

1. A pole piece cutter for preventing powder from falling off the cut surface, comprising a base (1) and a mounting shell (2), wherein the mounting shell (2) is mounted on the top of the base (1), and characterized in that: The invention also comprises a connecting plate (4), an upper cutter (5), a lower cutter (7) and a driving assembly. The upper part of the mounting shell (2) is slidably provided with a connecting plate (4), the bottom of the connecting plate (4) is provided with two upper cutters (5), the lower part of the mounting shell (2) is provided with a guide groove (6), the guide groove (6) is slidably provided with a lower cutter (7), the lower cutter (7) slides and contacts with the two upper cutters (5), and the mounting shell (2) is provided with a driving assembly for driving the upper cutter (5) and the lower cutter (7) to slide towards each other.

2. A pole piece cutter for preventing powder from falling off the cut surface as claimed in claim 1, characterized in that: The driving assembly comprises a rotating shaft (8), a gear (9), a first rack (10), a second rack (12), a first slider (14), a support seat (15), a cylinder (16) and a connecting rod (17); the rotating shaft (8) is rotatably arranged on the left side of the mounting shell (2); the gear (9) is fixedly connected to the rotating shaft (8); the first rack (10) is fixedly connected to the right side of the lower cutter (7); a straight groove (11) is provided on the left side of the mounting shell (2); a gear (9) is slidably arranged in the straight groove (11) A first slider (14), one side of the first slider (14) located in the mounting shell (2) is fixedly connected to a second rack (12), the first rack (10) and the second rack (12) are both meshed with the gear (9), a connecting rod (17) is fixedly connected between the second rack (12) and the connecting plate (4), a support seat (15) is installed on the upper part of the mounting shell (2), a cylinder (16) is installed on the support seat (15), and a telescopic rod of the cylinder (16) is connected to the first slider (14).

3. A pole piece cutter for preventing powder loss on the cut surface as claimed in claim 1, characterized in that: The invention also comprises a second slider (19), a first conveying roller (20) and a second conveying roller (21); two slide grooves (18) are provided on both the left and right sides of the installation shell (2); a second slider (19) is slidably arranged in the slide groove (18); the first conveying roller (20) is rotatably arranged on the two second sliders (19) located on the left and right sides of the installation shell (2); the second conveying roller (21) is rotatably arranged on both the left and right sides of the installation shell (2); and the first conveying roller (20) is located above the second conveying roller (21).

4. A pole piece cutter for preventing powder loss on the cut surface as claimed in claim 1, characterized in that: It also includes guide rods (3), two guide rods (3) are fixedly connected to the left and right sides of the installation shell (2), and the connecting plate (4) is slidably connected to the guide rods (3) on the left and right sides of the installation shell (2).

5. A pole piece cutter for preventing powder loss on the cut surface as claimed in claim 1, characterized in that: It also includes a material return rod (13), which is installed inside the mounting shell (2) and is located between the two upper cutters (5).

6. A pole piece cutter for preventing powder from falling off the cut surface as claimed in claim 3, characterized in that: It also includes an elastic member (22), and the elastic member (22) is connected between the slide groove (18) and the second sliding block (19).

7. A pole piece cutter for preventing powder loss on the cut surface as claimed in claim 1, characterized in that: The lower end of the upper cutting knife (5) is flush with the lower end of the material return rod (13).

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