A battery core steel shell detection fixture and its working method

Abstract

The present invention discloses a battery core steel shell detection fixture and a working method thereof. The detection fixture includes a mounting base plate; a centering clamping assembly, which includes a support frame and clamping jaws connected to each other, and the support frame is provided with a first limit block; a gauge lifting assembly, which includes a gauge, a lifting seat and a driving seat, and the driving seat can drive the lifting seat to move vertically by moving horizontally; the driving seat is provided with a second limit block; a cam plate, which is provided with a cam groove, and the first limit block and the second limit block both slide in the cam groove. The present invention utilizes a cam plate to uniformly control the clamping of the centering clamping assembly and the lifting of the gauge by the gauge lifting assembly, so that the two processes are integrated into the same device, avoiding errors when different devices are clamped and fixed, and the two clamping jaws adopt a centering clamping method, which makes the size detection accuracy of the steel shell higher. Moreover, the use of a cam plate drive can simplify the equipment structure, improve the detection efficiency, and is suitable for large-scale detection work scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and in particular to a battery core steel shell detection fixture and a working method thereof. Background Art

[0002] The steel case is an essential component of lithium-ion battery construction. Before the battery cells are placed in the case, the finished steel case must be inspected to ensure that its dimensions meet assembly precision requirements. Currently, lithium-ion battery production lines typically use dedicated automated testing equipment for steel cases. The automated testing equipment first clamps and secures the steel case. Then, a gauge used to measure the inner diameter of the steel case is raised and inserted into the case. Once the inspection is complete, the gauge lowers, releasing the steel case and allowing it to enter the subsequent assembly process.

[0003] In existing designs, the steel shell clamping and positioning and the inspection fixture lifting are usually two separate independent structures, driven by two cylinders or motors. This makes positioning accuracy difficult to ensure, prone to misjudgment, and there is a risk of friction scratching the steel shell. Moreover, in the current clamping and positioning device, only one of the two jaws is movable, and the other jaw is fixed to achieve unilateral positioning, which has low positioning accuracy. Therefore, manual adjustment is usually required to eliminate positioning errors, which is not conducive to continuous production and the inspection efficiency cannot meet the requirements of mass production. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery cell steel shell inspection fixture that can improve the inspection accuracy and efficiency of lithium battery steel shells to meet mass production requirements.

[0005] The present invention also provides a working method for the above-mentioned battery cell steel shell detection fixture, which can complete the detection of multiple lithium battery steel shells in an assembly line manner.

[0006] A battery core steel shell detection fixture according to an embodiment of the first aspect of the present invention includes:

[0007] Install the base plate;

[0008] There are two centering clamping assemblies, which are symmetrically arranged. The centering clamping assemblies include a support frame and clamping jaws connected to each other, and a first limit block is provided at the bottom of the support frame;

[0009] The gauge lifting assembly includes a gauge, a lifting seat and a driving seat. The gauge is arranged on the top of the lifting seat. The driving seat can drive the lifting seat to move vertically when it moves horizontally. A second limit block is provided at the bottom of the driving seat.

[0010] a cam plate rotatably connected to the mounting base plate, the cam plate being provided with a cam groove, the cam groove forming a symmetrical closed figure, the first limit block and the second limit block both sliding in the cam groove;

[0011] When the cam plate rotates, the clamping claws in the two centering clamping assemblies are firstly caused to clamp the steel shell, and then the lifting seat is driven to lift the inspection tool into the interior of the steel shell.

[0012] The battery cell steel shell inspection fixture according to the embodiments of the present invention has at least the following beneficial effects: A cam plate uniformly controls the clamping of the centering clamping assembly and the lifting of the inspection fixture by the inspection fixture lifting assembly, integrating both processes into a single device and avoiding errors in the clamping and fixing of different devices. Furthermore, the two jaws adopt a centering clamping method, which improves the dimensional inspection accuracy of the steel shell. Furthermore, the use of a cam plate drive simplifies the device structure and improves inspection efficiency, making it suitable for high-volume inspection scenarios.

[0013] According to some embodiments of the present invention, the centering clamping assembly further includes a first slide rail mechanism, the first slide rail mechanism is mounted on the mounting base plate, and the support frame is slidably connected to the mounting base plate via the first slide rail mechanism.

[0014] According to some embodiments of the present invention, the centering clamping assembly further includes a locking mechanism, the clamping jaw is slidably connected to the support frame, the clamping jaw slides in a horizontal direction to adjust the extension distance of the clamping jaw, and the locking mechanism locks the position of the clamping jaw.

[0015] According to some embodiments of the present invention, the locking mechanism includes a top screw, the support frame is provided with a threaded hole, the top screw is threadedly connected to the threaded hole, and an end of the top screw extends from the threaded hole and abuts against an end of the clamping jaw.

[0016] According to some embodiments of the present invention, the gauge lifting assembly further includes a second slide rail mechanism, the second slide rail mechanism is mounted on the mounting base, and the lifting seat is slidably connected to the mounting base via the second slide rail mechanism.

[0017] According to some embodiments of the present invention, an oblique guide groove is provided on the side of the lifting seat, and a guide block capable of sliding in the guide groove extends outward from the driving seat. The horizontal movement of the driving seat can drive the lifting seat to move vertically through the guide block.

[0018] According to some embodiments of the present invention, the battery core steel shell detection fixture further includes a motor, which is connected to the mounting base and drives the cam plate to rotate.

[0019] According to some embodiments of the present invention, the battery cell steel shell inspection fixture further includes a defective detection component, which includes a buffer guide rod and a sensor connected to each other, and the buffer guide rod and the inspection fixture are respectively arranged at both ends of the steel shell; when the steel shell is lifted by the inspection fixture due to dimensional error, the steel shell can contact the buffer guide rod and trigger the sensor.

[0020] According to some embodiments of the present invention, the first limiting block and the second limiting block are both installed with bearings, and the first limiting block and the second limiting block are both in rolling contact with the inner wall of the cam groove through the bearings.

[0021] According to the working method of the second embodiment of the present invention, which is based on the above-mentioned battery core steel shell detection fixture, the method includes the following steps:

[0022] Use a manipulator or other loading equipment to place the steel shell to be tested into the battery cell steel shell testing fixture;

[0023] The cam plate rotates, and the first limit block moves in the cam groove, driving the two centering clamping assemblies to approach each other, so that the two clamping jaws clamp and fix the steel shell;

[0024] The cam plate continues to rotate, and the second limit block moves in the cam groove, driving the driving seat to move horizontally, thereby driving the lifting seat to extend the inspection tool into the steel shell;

[0025] After the inspection is completed, the cam plate continues to rotate, and the second limit block moves in the cam groove, driving the driving seat to move horizontally, driving the lifting seat to descend to extract the inspection tool from the steel shell;

[0026] The cam plate continues to rotate, and the first limit block moves in the cam groove, driving the two centering clamping assemblies away from each other, and the steel shell is released from the two clamping jaws;

[0027] Use a manipulator or other unloading equipment to remove the inspected steel shell from the battery cell steel shell inspection fixture;

[0028] The above steps are repeated in a cycle to complete the detection of the plurality of steel shells.

[0029] The working method according to the embodiment of the present invention has at least the following beneficial effects: it can improve the detection rhythm of the steel shell and accelerate the detection speed.

[0030] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0032] Figure 1 This is a front view of a battery core steel shell inspection fixture according to an embodiment of the present invention;

[0033] Figure 2 This is a side view of a battery cell steel shell inspection fixture according to an embodiment of the present invention;

[0034] Figure 3 This is a top view of a battery cell steel shell inspection fixture according to an embodiment of the present invention.

[0035] Figure markings: 100-mounting base plate, 200-centering clamping assembly, 210-support frame, 211-first limit block, 220-clamping claw, 230-first slide rail mechanism, 240-locking mechanism, 300-gauge lifting assembly, 310-gauge, 320-lifting seat, 321-guide groove, 330-driving seat, 331-second limit block, 332-guide block, 340-second slide rail mechanism, 400-cam plate, 410-cam groove, 500-motor, 600-defective product detection assembly, 610-buffer guide rod, 620-sensor, 700-steel shell. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] In existing designs, steel shell clamping and positioning, and gauge lifting, are typically separated into two independent structures, each driven by a separate cylinder or motor. This makes positioning accuracy difficult to ensure, prone to misjudgment, and creates the risk of friction and scratches on the steel shell. Therefore, manual adjustment is often required to eliminate positioning errors, which is detrimental to continuous production and the inspection efficiency cannot meet the requirements of mass production.

[0042] In this regard, the present application proposes a battery cell steel shell inspection fixture, which uses a cam plate 400 to uniformly control the clamping of the centering clamping assembly 200 and the lifting of the inspection fixture 310 by the inspection fixture lifting assembly 300, so that the two processes are integrated into the same device, avoiding errors when different devices are clamped and fixed, and the two clamping jaws 220 adopt a centering clamping method, which makes the size detection accuracy of the steel shell 700 higher. Moreover, the use of the cam plate 400 to drive can simplify the equipment structure, improve the detection efficiency, and is suitable for large-scale detection work scenarios. In addition, the present application also proposes a working method for the above-mentioned battery cell steel shell inspection fixture, which can improve the detection rhythm of the steel shell 700 and speed up the detection speed.

[0043] Reference Figure 1 The battery cell steel shell inspection fixture in the embodiment of the present application includes a mounting base 100, a centering clamping assembly 200, a gauge lifting assembly 300 and a cam plate 400. Among them, the mounting base 100 is the main structure of the battery cell steel shell inspection fixture, which is used to provide support for other components. The centering clamping assembly 200 is used to clamp and fix the steel shell 700 to be inspected, and the gauge lifting assembly 300 is used to lift the gauge 310 to detect the internal dimensions of the steel shell 700. The cam plate 400 is used to control the centering clamping assembly 200 to clamp or release the steel shell 700, and to control the gauge lifting assembly 300 to lift the gauge 310.

[0044] Specifically, there are two centering clamping assemblies 200 and they are symmetrically arranged. They include a support frame 210 and a clamping jaw 220 that are connected to each other. A first limiting block 211 is provided at the bottom of the support frame 210 to interact with the cam plate 400.

[0045] Reference Figure 2 The gauge lifting assembly 300 includes a gauge 310, a lifting base 320, and a drive base 330. The gauge 310 is mounted on top of the lifting base 320. The horizontal movement of the drive base 330 drives the lifting base 320 to move vertically, thereby raising and lowering the gauge 310. A second stopper 331 is provided at the bottom of the drive base 330 to engage with the cam plate 400.

[0046] The cam plate 400 is rotatably connected to the mounting base 100 and has a cam slot 410 formed thereon. Figure 3 The cam groove 410 forms a symmetrical closed shape, and the first stopper 211 and the second stopper 331 both slide in the cam groove 410. Therefore, when the cam plate 400 rotates, it can drive the centering clamping assemblies 200 to move toward each other to complete the centering clamping of the steel shell 700, and drive the gauge lifting assembly 300 to lift the gauge 310.

[0047] It is worth noting that when the cam plate 400 rotates, it first causes the clamping jaws 220 in the two centering clamping assemblies 200 to clamp the steel shell 700 , and then drives the lifting seat 320 to lift the inspection tool 310 into the interior of the steel shell 700 .

[0048] Furthermore, the centering clamping assembly 200 further includes a first slide rail mechanism 230, which is mounted on the mounting base 100. The support frame 210 is slidably connected to the mounting base 100 via the first slide rail mechanism 230. The first slide rail mechanism 230 is used to limit the movement direction of the support frame 210 and reduce the friction resistance of the support frame 210.

[0049] Furthermore, the centering clamping assembly 200 includes a locking mechanism 240. The jaws 220 are slidably connected to the support frame 210. The jaws 220 can slide horizontally to adjust the extension distance of the jaws 220, thereby adjusting the clamping force of the jaws 220 on the steel shell 700. The locking mechanism 240 is used to lock the position of the jaws 220, preventing the jaws 220 from shifting during clamping. Specifically, the locking mechanism 240 includes a jackscrew. The support frame 210 has a threaded hole. The jackscrew is threadedly connected to the threaded hole, and the end of the jackscrew extends from the threaded hole and abuts the end of the jaw 220. Therefore, when the jackscrew is turned, the end of the jackscrew approaches the jaws 220 and drives the jaws 220 to move, completing the fine-tuning of the position of the jaws 220. Furthermore, the jackscrew and the threaded hole have a self-locking function, which prevents the jaws 220 from loosening even when they are under pressure.

[0050] Furthermore, the end of the clamping jaw 220 is provided with an arc structure to better fit the outer surface of the steel shell 700. An elastic cushion layer can be provided on the inner wall of the arc structure to reduce the scratching of the outer surface of the steel shell 700 by the clamping jaw 220.

[0051] Furthermore, the gauge lifting assembly 300 further includes a second slide rail mechanism 340, which is mounted on the mounting base 100. The lifting base 320 is slidably connected to the mounting base 100 via the second slide rail mechanism 340. The second slide rail mechanism 340 is used to limit the movement direction of the lifting base 320 and reduce the frictional resistance of the lifting base 320.

[0052] Regarding the driving method in which the driving seat 330 drives the lifting seat 320 to lift, in some embodiments, a connecting rod is provided between the two, with both ends of the connecting rod being hinged to the lifting seat 320 and the driving seat 330, respectively. When the driving seat 330 moves horizontally, the connecting rod converts the horizontal force component into a vertical force component, thereby driving the lifting seat 320 to move in the vertical direction.

[0053] In this embodiment, the side of the lifting seat 320 is provided with an oblique guide groove 321, and the driving seat 330 extends outward with a guide block 332 that can slide in the guide groove 321. When the driving seat 330 moves horizontally, the lifting seat 320 can be driven to move vertically through the guide block 332.

[0054] Furthermore, the battery core steel shell detection fixture further includes a motor 500, which is connected to the mounting base 100 and drives the cam plate 400 to rotate. The output shaft of the motor 500 can be directly connected to the cam plate 400, or drive the cam plate 400 to rotate through a reduction mechanism.

[0055] Furthermore, the battery cell steel shell inspection fixture includes a defective product detection assembly 600, which comprises a buffer guide rod 610 and a sensor 620 connected to each other. The buffer guide rod 610 and the inspection fixture 310 are respectively arranged at both ends of the steel shell 700. When the inspection fixture 310 lifts the steel shell 700 due to a dimensional error, the steel shell 700 can contact the buffer guide rod 610 and trigger the sensor 620, sounding an alarm indicating the presence of defective products and entering the subsequent defective product recovery process.

[0056] Furthermore, the first limiting block 211 and the second limiting block 331 are both installed with bearings, and the first limiting block 211 and the second limiting block 331 are in rolling contact with the inner wall of the cam groove 410 through the bearings to reduce friction resistance.

[0057] A working method in an embodiment of the present application is performed on the above-mentioned battery cell steel shell detection fixture, including the following steps:

[0058] S100. Use a manipulator or other loading equipment to place the steel shell 700 to be tested into the battery steel shell detection fixture;

[0059] S200. The cam plate 400 rotates, and the first stopper 211 moves in the cam groove 410, driving the two centering clamping assemblies 200 closer to each other, so that the two clamping jaws 220 clamp the steel shell 700;

[0060] S300. The cam plate 400 continues to rotate, and the second limit block 331 moves in the cam groove 410, driving the drive seat 330 to move horizontally, thereby driving the lifting seat 320 to extend the inspection fixture 310 into the steel shell 700;

[0061] S400. After the test is completed, the cam plate 400 continues to rotate, the second limit block 331 moves in the cam groove 410, driving the drive seat 330 to move horizontally, driving the lifting seat 320 to descend to extract the inspection fixture 310 from the steel shell 700;

[0062] S500. The cam plate 400 continues to rotate, the first stopper 211 moves in the cam groove 410, driving the two centering clamping assemblies 200 away from each other, and the steel shell 700 is released from the two clamping jaws 220;

[0063] S600. Use a manipulator or other unloading equipment to remove the completed steel shell 700 from the battery steel shell detection fixture;

[0064] S700. Repeat the above steps to complete the inspection of multiple steel shells 700.

[0065] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A battery core steel shell detection fixture, characterized in that: include: Install the base plate; There are two centering clamping assemblies, which are symmetrically arranged. The centering clamping assemblies include a support frame and clamping jaws connected to each other, and a first limit block is provided at the bottom of the support frame; The gauge lifting assembly includes a gauge, a lifting seat and a driving seat. The gauge is arranged on the top of the lifting seat. The driving seat can drive the lifting seat to move vertically when it moves horizontally. A second limit block is provided at the bottom of the driving seat. a cam plate rotatably connected to the mounting base plate, the cam plate being provided with a cam groove, the cam groove forming a symmetrical closed figure, the first limit block and the second limit block both sliding in the cam groove; When the cam plate rotates, the clamping claws in the two centering clamping assemblies are firstly caused to clamp the steel shell, and then the lifting seat is driven to lift the inspection tool into the interior of the steel shell.

2. The battery core steel shell detection fixture according to claim 1, characterized in that: The centering clamping assembly further includes a first slide rail mechanism, which is mounted on the mounting base plate. The support frame is slidably connected to the mounting base plate via the first slide rail mechanism.

3. The battery core steel shell detection fixture according to claim 1, characterized in that: The centering clamping assembly further includes a locking mechanism. The clamping jaw is slidably connected to the support frame. The clamping jaw slides in a horizontal direction to adjust the extension distance of the clamping jaw. The locking mechanism locks the position of the clamping jaw.

4. The battery core steel shell detection fixture according to claim 3, characterized in that: The locking mechanism includes a top screw, a threaded hole is formed in the support frame, the top screw is threadedly connected to the threaded hole, and an end portion of the top screw extends out of the threaded hole and abuts against an end portion of the clamping jaw.

5. The battery core steel shell detection fixture according to claim 1, characterized in that: The inspection tool lifting assembly further includes a second slide rail mechanism, which is mounted on the mounting base plate. The lifting seat is slidably connected to the mounting base plate via the second slide rail mechanism.

6. The battery core steel shell detection fixture according to claim 1, characterized in that: An obliquely arranged guide groove is provided on the side of the jacking seat, and a guide block which can slide in the guide groove extends outward from the driving seat. The horizontal movement of the driving seat can drive the jacking seat to move vertically through the guide block.

7. The battery core steel shell detection fixture according to claim 1, characterized in that: The battery core steel shell detection fixture also includes a motor, which is connected to the mounting base and drives the cam plate to rotate.

8. The battery core steel shell detection fixture according to claim 1, characterized in that: The battery cell steel shell inspection fixture also includes a defective detection component, which includes a buffer guide rod and a sensor connected to each other. The buffer guide rod and the inspection fixture are respectively arranged at both ends of the steel shell; when the steel shell is lifted by the inspection fixture due to dimensional error, the steel shell can contact the buffer guide rod and trigger the sensor.

9. The battery core steel shell detection fixture according to any one of claims 1 to 8, characterized in that: The first limiting block and the second limiting block are both installed with bearings, and the first limiting block and the second limiting block are both in rolling contact with the inner wall of the cam groove through the bearings.

10. A working method for the battery core steel shell detection fixture according to any one of claims 1 to 9, characterized in that: include: Use a manipulator or other loading equipment to place the steel shell to be tested into the battery cell steel shell testing fixture; The cam plate rotates, and the first limit block moves in the cam groove, driving the two centering clamping assemblies to approach each other, so that the two clamping jaws clamp and fix the steel shell; The cam plate continues to rotate, and the second limit block moves in the cam groove, driving the driving seat to move horizontally, thereby driving the lifting seat to extend the inspection tool into the steel shell; After the inspection is completed, the cam plate continues to rotate, and the second limit block moves in the cam groove, driving the driving seat to move horizontally, driving the lifting seat to descend to extract the inspection tool from the steel shell; The cam plate continues to rotate, and the first limit block moves in the cam groove, driving the two centering clamping assemblies away from each other, and the steel shell is released from the two clamping jaws; Use a manipulator or other unloading equipment to remove the inspected steel shell from the battery cell steel shell inspection fixture; The above steps are repeated in a cycle to complete the detection of the plurality of steel shells.

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