Cylindrical lithium battery electrode tip and resistance welding electrode needle grinding device

Abstract

The utility model relates to the technical field of electrode grinding, in particular to a cylindrical lithium battery electrode tip and resistance welding electrode needle grinding device which comprises an outer shell, a grinding head and a motor, a sealing cover is arranged on the top of the outer shell, the grinding head and the motor are both arranged in the outer shell, the grinding head is fixedly connected with the output end of the top of the motor, and the motor is connected with the grinding head. The sealing cover is provided with an input pipe, the input pipe faces the grinding head, a grinding groove and a grinding table are arranged on the upper surface of the grinding head, the grinding groove is wound around the edge of the grinding head, the grinding table is arranged in the middle of the grinding head, and grinding faces are arranged on the surfaces of the grinding groove and the grinding table. A cylindrical lithium battery and a resistance welding pen can be fixed by changing the position and the size of the input pipe, the motor drives the grinding head to rotate, and therefore grinding of impurities such as oxides on the surfaces of a cylindrical lithium battery electrode tip and a resistance welding electrode needle and size and shape finishing of the end of the resistance welding electrode needle are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode grinding, in particular to a grinding device for a cylindrical lithium battery electrode head and a resistance welding electrode needle. Background Art

[0002] Resistance welding is a commonly used welding method. Resistance welding uses the resistance heat effect generated by the current flowing through the contact surface of the workpiece and the adjacent area to heat it to a molten or plastic state to form a combination. However, the high temperature generated during the welding process and the long-term use of the resistance welding electrode needle will cause the oxidation of the cylindrical lithium battery electrode head and the resistance welding electrode needle, and produce oxides and other impurities on their surface. The oxides and other impurities on the surface of the workpiece increase the contact resistance. An overly thick oxide layer may even prevent the current from passing or conduct the current locally. Due to the excessive current density, spatter and surface burning will occur. At the same time, the unevenness of the oxide layer will also affect the inconsistent heating of each welding point, causing fluctuations in welding quality. Therefore, cleaning the surface of the workpiece is a necessary condition to ensure a high-quality joint. These unfavorable factors can be removed by grinding the oxides and other impurities on the surface of the workpiece to ensure the purity and strength of the welded joint and the finish and quality of the workpiece. The grinding method based on manual sandpaper grinding is inefficient, takes a lot of manpower, is time-consuming and labor-intensive, and cannot accurately control the size and shape of the end of the resistance welding electrode needle, resulting in unnecessary costs.

[0003] In response to the above problems, a Chinese patent with publication number CN112108961A discloses a battery cell electrode grinding device for grinding battery electrodes. The grinding process is mainly as follows: the battery is placed on a first lifting mechanism, and the second lifting mechanism is provided with a reciprocating motion mechanism and a grinding mechanism. The battery electrode is contacted with the grinding mechanism by controlling the two lifting mechanisms to achieve the grinding of the battery electrode.

[0004] A Chinese patent with publication number CN108274347A discloses a spot welding needle grinding device for grinding spot welding needles. When in use, the welding needle body is arranged in the center of the clamping nozzle and is fixed by the clamping nozzle. A groove is arranged in the middle of the lower clamp, and a grinding coating is arranged in the groove. The groove is driven to rotate by a rotating component, and the clamping nozzle is controlled to move downward so that the welding needle body contacts the middle of the groove, thereby realizing the grinding of the welding needle body.

[0005] The above two inventions respectively realize the grinding of battery electrodes and resistance welding spot welding needles, but in the actual process of resistance welding, both the lithium cylindrical lithium battery electrode head and the resistance welding electrode needle will have an uneven surface and an overly thick oxide layer, and the existing technology cannot achieve grinding of both; in the existing technology, when fixing the lithium cylindrical lithium battery or the resistance welding pen, the cylindrical lithium battery electrode head or the resistance welding electrode needle cannot be accurately contacted with the grinding surface, resulting in the surface of the cylindrical lithium battery electrode head or the resistance welding electrode needle being insufficient to achieve the grinding effect, or excessive grinding causing the size and shape of the end of the cylindrical lithium battery electrode head or the resistance welding electrode needle to change; in the actual grinding process, impurities on the surface of the cylindrical lithium battery electrode head or the resistance welding electrode needle will splash around during grinding, which can easily cause certain injuries to the operator and have poor safety. Utility Model Content

[0006] In view of the technical defects existing in the background technology, the utility model proposes a cylindrical lithium battery electrode head and resistance welding electrode needle grinding device, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0007] The utility model discloses a cylindrical lithium battery electrode head and resistance welding electrode needle grinding device, comprising an outer shell, a grinding head and a motor, characterized in that a sealing cover is provided on the top of the outer shell, the grinding head and the motor are both arranged inside the outer shell, and the grinding head is fixedly connected to the output end of the motor.

[0008] An input tube is provided inside the sealing cover, the input tube faces the grinding head, a limiting hole is provided at the bottom of the input tube, a grinding groove and a grinding table are provided on the upper surface of the grinding head, the grinding table is provided in the middle of the grinding head, the grinding groove is arranged around the edge of the grinding head, and grinding surfaces are provided on the surfaces of the grinding groove and the grinding table.

[0009] As a further technical solution of the utility model, an annular fixing block is provided under the sealing cover, the fixing block is fixedly connected to the outer shell, and the fixing block is fixedly connected to the motor.

[0010] As a further technical solution of the utility model, a fixing clamp hole is provided inside the sealing cover which passes through from top to bottom, the input pipe is passed through the fixing clamp hole, and matching threads are provided on the inner wall of the fixing clamp hole and the outer wall of the input pipe.

[0011] As a further technical solution of the utility model, the central axis of the limiting hole is located in the grinding groove.

[0012] As a further technical solution of the utility model, the central axis of the limiting hole is located on the grinding table.

[0013] As a further technical solution of the utility model, a power switch is provided on one side of the outer shell, and the power switch is connected to the motor through a wire.

[0014] As a further technical solution of the utility model, a plurality of fixing legs are provided at the bottom of the outer shell.

[0015] The beneficial effects of the utility model are as follows: the utility model drives the grinding head to rotate by a motor, and changes the position of the input tube by replacing the sealing cover, so that the resistance welding pen or the cylindrical lithium battery is fixed in the input tube, and the resistance welding electrode needle or the cylindrical lithium battery electrode head contacts the grinding groove or the surface of the grinding table, thereby realizing the grinding of the surface of the cylindrical lithium battery electrode head or the resistance welding electrode needle and the trimming of the size and shape of the end of the resistance welding electrode needle, which helps to evenly distribute the welding current on the contact surface during resistance welding, ensure the welding quality, and extend the service life of the resistance welding electrode needle and the cylindrical lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a cylindrical lithium battery electrode head and a resistance welding electrode needle grinding device.

[0017] Figure 2 The present invention is a schematic diagram of the structure of a grinding head for a cylindrical lithium battery electrode head and a resistance welding electrode needle grinding device.

[0018] Figure 3 The present invention is a cross-sectional view of a grinding head of a cylindrical lithium battery electrode head and a resistance welding electrode needle grinding device.

[0019] Figure 4 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0020] Figure 5 It is a cross-sectional view of a second embodiment of a cylindrical lithium battery electrode head and resistance welding electrode needle grinding device.

[0021] Figure 6 for Figure 5 A local enlarged schematic diagram of point B in the middle.

[0022] Figure 7 The present invention is a schematic structural diagram of a cylindrical lithium battery electrode head and a resistance welding electrode needle grinding device.

[0023] Among them: outer shell 1, grinding head 2, grinding groove 21, grinding table 22, motor 3, sealing cover 4, fixed clamp hole 5, fixed block 6, input tube 7, power switch 8, fixed support foot 9, limit hole 10, resistance welding pen 11, resistance welding electrode needle 12, cylindrical lithium battery 13, cylindrical lithium battery electrode head 14. DETAILED DESCRIPTION

[0024] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0025] like Figures 1 to 4 As shown, a cylindrical lithium battery electrode head and resistance welding electrode needle grinding device, the first embodiment includes an outer shell 1, a grinding head 2 and a motor 3, characterized in that a sealing cover 4 is provided on the top of the outer shell 1, the grinding head 2 and the motor 3 are both arranged inside the outer shell 1, and the output ends of the grinding head 2 and the motor 3 are fixedly connected; an input tube 7 is provided inside the sealing cover 4, the input tube 7 faces the grinding head 2, and a limiting hole 10 is provided at the bottom of the input tube 7, a grinding groove 21 and a grinding table 22 are provided on the upper surface of the grinding head 2, the grinding groove 21 is arranged along the edge of the grinding head 2, the grinding table 22 is arranged in the middle of the grinding head 2, and the surfaces of the grinding groove 21 and the grinding table 22 are provided with grinding surfaces; a power switch 8 is provided on one side of the outer shell 1, and the power switch 8 is connected to the motor 3 through a wire.

[0026] like Figure 7 As shown, a power jack is provided on the outside of the outer shell 1, and power is supplied to the motor 3 by connecting the power supply. The grinding device connects the power supply, the power switch 8 and the motor 3 through a wire. When the power supply is turned on and the power switch 8 is turned on, the motor 3 starts to work to drive the grinding head 2 to rotate. At this time, the cylindrical lithium battery 13 or the resistance welding pen 11 is fixed in the input tube 7 through the limiting hole 10, and the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12 is in contact with the grinding head 2. A large friction force is continuously generated between the rotating grinding head 2 and the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12, thereby realizing the grinding of impurities on the surface of the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12; the outer shell 1 connects the grinding head 2 with the electric The machine 3 is surrounded, which can reduce the wear of the grinding head 2 and the motor 3 and extend the service life of the grinding head 2 and the motor 3. During the grinding process, the outer shell 1 can block the splashing of impurities such as oxides ground off the grinding object to prevent damage to the operator. At the same time, compared with the hand-held cylindrical lithium battery 13 or the resistance welding pen 11 for grinding, the cylindrical lithium battery 13 or the resistance welding pen 11 is directly fixed in the input tube 7 to perform surface grinding on the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12. The cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12 can be ground more accurately, so that the grinding efficiency is effectively improved, and the operator's hand can be prevented from approaching the grinding head 2 and causing hand injuries.

[0027] It should be noted that the grinding groove 21 is arranged along the edge of the grinding head 2. Since the resistance welding pen 11 and its resistance welding electrode needle 12 are small in size, they are suitable for grinding using the grinding groove 21. When the motor 3 drives the grinding head 2 to rotate, the resistance welding electrode needle 12 can be kept on the grinding surface of the grinding groove 21. The diameter of the grinding table 22 gradually decreases from top to bottom. The lower end of the inclined surface of the grinding table 22 is connected to the inner edge of the grinding groove 21. When the resistance welding electrode needle 12 contacts the inclined surface of the grinding table 22, the side of the resistance welding electrode needle 12 can also be ground. Since the cylindrical lithium battery 13 is cylindrical, the negative electrode is flat and slightly concave inward, and the positive electrode is provided with a raised positive electrode head, it is suitable for grinding using the grinding table 22. The material of the grinding surface is corundum, which has greater hardness and strength, good wear resistance, and stable chemical properties. Therefore, it is used as a grinding material to increase the friction between the grinding surface and the grinding object and improve the grinding efficiency.

[0028] After adopting the above structure, it needs to be further explained that, if Figures 2~4 As shown, when grinding the resistance welding electrode needle 12, the sealing cover 4 is replaced, the position of the input tube 7 is changed, the central axis of the limiting hole 10 is located inside the grinding groove 21, the resistance welding pen 11 is fixed inside the input tube 7 by the limiting hole 10, and the surface of the resistance welding electrode needle 12 is in contact with the grinding groove 21.

[0029] like Figure 5 , 6 As shown, as the second preferred embodiment of the utility model, the difference between this embodiment and the previous embodiment is that the sealing cover 4 is replaced, the position of the input tube 7 is changed, and the central axis of the limiting hole 10 is located on the grinding table 22; the cylindrical lithium battery 13 is placed in the input tube 7 that matches it, and the cylindrical lithium battery 13 is fixed inside the input tube 7 through the limiting hole 10, and the cylindrical lithium battery electrode head 14 to be ground is in contact with the surface of the grinding table 22, and the edge of the cylindrical lithium battery electrode head 14 coincides with the edge of the grinding table 22, and the grinding head 2 is driven by the motor 3 to rotate to grind the cylindrical lithium battery electrode head 14.

[0030] To sum up, the utility model drives the grinding head 2 to rotate along the central axis by the motor 3, and changes the position of the input tube 7 in the sealing cover 4 by replacing the sealing cover 4, so that the resistance welding pen 11 or the cylindrical lithium battery 13 is fixed in the input tube 7, and the resistance welding electrode needle 12 or the cylindrical lithium battery electrode head 14 contacts the surface of the grinding groove 21 or the grinding table 22, so as to realize the grinding of the surface of the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12 and the size and shape trimming of the end of the resistance welding electrode needle 12, which helps to evenly distribute the welding current on the contact surface during resistance welding, ensure the welding quality, extend the service life of the resistance welding electrode needle 12 and the cylindrical lithium battery 13, and at the same time, while ensuring the grinding efficiency, it can also eliminate the safety hazards existing during the grinding operation.

[0031] As one of the preferred embodiments of the utility model, an annular fixing block 6 is provided below the sealing cover 4 , the fixing block 6 is fixedly connected to the outer shell 1 , and the bottom of the fixing block 6 is fixedly connected to the motor 3 .

[0032] The motor 3 is connected to the outer shell 1 through the fixing block 6, so that the motor 3 is fixed in the outer shell 1. The grinding head 2, the fixing block 6 and the motor 3 are located on the same central axis. The connection between the fixing block 6, the motor 3 and the outer shell 1 can balance the force on the motor 3 and stabilize the motor 3 inside the outer shell 1. The motor 3 will not tilt due to the vibration generated when the motor 3 is in operation, and the surface of the grinding object will not be ground unevenly or damaged during the grinding process.

[0033] As one of the preferred embodiments of the utility model, a fixing clamp hole 5 is provided inside the sealing cover 4 from top to bottom, and the input pipe 7 is passed through the fixing clamp hole 5. The inner wall of the fixing clamp hole 5 and the outer wall of the input pipe 7 are both provided with matching threads.

[0034] According to the different sizes or shapes of resistance welding electrode needles 12 and cylindrical lithium battery electrode heads 14 that need to be ground, different input tubes 7 and fixed clamp holes 5 can be replaced to fix the resistance welding pen 11 or the cylindrical lithium battery 13 in the fixed clamp hole 5 through the limiting hole 10, and the resistance welding pen 11 or the cylindrical lithium battery 13 is placed in the input tube 7 that matches it. The resistance welding pen 11 or the cylindrical lithium battery 13 is fixed in the input tube 7, and the surface of the resistance welding electrode needle 12 that needs to be ground is in precise contact with the surface of the grinding groove 21 or the grinding table 22. The grinding head 2 is driven by the motor 3 to rotate to grind the resistance welding electrode needle 12, which can achieve the grinding of the resistance welding electrode needle 12 and improve the grinding quality.

[0035] As one of the preferred embodiments of the present utility model, a plurality of fixing legs 9 are provided at the bottom of the outer shell 1 .

[0036] A protective cover made of rubber material may be provided on the outside of the fixed support foot 9 to increase the friction between the grinding device and the plane and to stabilize the grinding device; the fixed support foot 9 may be set as a rubber vacuum disc as needed to fix the grinding device on a plane by a pressure difference; a wheel is provided under the fixed support foot 9, and a fixed clamping foot is provided on one side of the wheel. When the device needs to perform grinding work, the fixed clamping foot is lowered to fix the wheel, and the grinding device is stabilized in a fixed position and then the device is started for grinding. When it needs to be moved, the fixed clamping foot is retracted, and the wheel is driven to roll by gently pushing the device, so that the device can be easily pushed to the required position.

[0037] In summary, the utility model is a cylindrical lithium battery electrode head and resistance welding electrode needle grinding device, by replacing the sealing cover 4, the position of the input tube 7 is changed, different input tubes 7 are selected according to the type and size of the grinding object, and a limiting hole 10 is provided at the bottom of the input tube 7, so that the cylindrical lithium battery 13 or the resistance welding pen 11 is fixed in the input tube 7, and the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12 is in contact with the grinding groove 21 or the grinding table 22 surface, and the grinding groove 21 and the grinding table 22 The surface is provided with a grinding surface made of diamond material, and the rotation of the grinding head 2 is driven by the motor 3 to make the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12 rub against the grinding surface to achieve the effect of grinding the surface of the cylindrical lithium battery electrode head 14 or the resistance welding electrode needle 12.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A cylindrical lithium battery electrode head and resistance welding electrode needle grinding device, comprising an outer shell (1), a grinding head (2) and a motor (3), characterized in that: A sealing cover (4) is provided on the top of the outer shell (1); the grinding head (2) and the motor (3) are both arranged inside the outer shell (1); and the output ends of the grinding head (2) and the motor (3) are fixedly connected; An input tube (7) is provided inside the sealing cover (4), the input tube (7) faces the grinding head (2), a limiting hole (10) is provided at the bottom of the input tube (7), a grinding groove (21) and a grinding table (22) are provided on the upper surface of the grinding head (2), the grinding table (22) is arranged in the middle of the grinding head (2), the grinding groove (21) is arranged along the edge of the grinding head (2), and grinding surfaces are provided on the surfaces of the grinding groove (21) and the grinding table (22).

2. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: An annular fixing block (6) is provided below the sealing cover (4); the fixing block (6) is fixedly connected to the outer shell (1); and the fixing block (6) is fixedly connected to the motor (3).

3. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: The sealing cover (4) is provided with a fixing clamp hole (5) extending from top to bottom, the input pipe (7) is inserted into the fixing clamp hole (5), and the inner wall of the fixing clamp hole (5) and the outer wall of the input pipe (7) are provided with matching threads.

4. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: The central axis of the limiting hole (10) is located in the grinding groove (21).

5. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: The central axis of the limiting hole (10) is located on the grinding table (22).

6. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: A power switch (8) is provided on the outer wall of the outer shell (1), and the power switch (8) is electrically connected to the motor (3) via a wire.

7. The cylindrical lithium battery electrode head and resistance welding electrode needle grinding device according to claim 1, characterized in that: The lower surface of the outer shell (1) is provided with a plurality of fixed legs (9).

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