Lithium battery module extrusion test device

Abstract

The utility model discloses a lithium battery module extrusion testing device which comprises a workbench, two sides of the top of the workbench are respectively provided with a sliding groove in a concave mode, sliding blocks are connected in the sliding grooves in a sliding mode, the top ends of the sliding blocks are fixedly connected with clamping plates, the sliding blocks are connected with two-way screws through thread structures, the two-way screws are installed in the sliding grooves in a rotating mode, and the two-way screws are in transmission connection with a rotating drum. The top of the rotating cylinder is rotatably provided with an external thread cylinder, the external thread cylinder and the rotating cylinder are rotatably sleeved with a rotating shaft, the top of the rotating shaft is rotatably connected with a top plate, the end of the rotating shaft is fixedly connected with an output shaft of a servo motor, and the servo motor is fixedly installed at the top of the top plate; the four corners of the bottom end of the top plate are fixedly connected with one ends of supporting columns correspondingly, the other ends of the supporting columns are fixedly connected with the workbench, and a switching assembly is slidably clamped outside the rotating shaft and arranged between the outer threaded cylinder and the rotating cylinder. The external threaded cylinders are connected with two sides of a movable plate through threaded structures, and the middle bottom end of the movable plate is fixedly connected with a pressure sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery module testing, in particular to a lithium battery module extrusion testing device. Background Art

[0002] Lithium batteries are a type of rechargeable battery that uses lithium metal or lithium alloys and other materials containing lithium elements as electrodes and uses non-aqueous electrolyte solutions containing lithium salts. They mainly rely on the movement of lithium ions between the positive and negative electrodes to work. Lithium batteries have the advantages of high energy density, high operating voltage, low self-discharge rate, high charging efficiency, long battery life, long cycle life, no memory effect and green environmental protection. They are suitable for making high-capacity, miniaturized, lightweight green high-energy rechargeable batteries and are the representative of modern high-performance batteries. At present, square lithium batteries are the mainstream batteries in the lithium battery market. In order to meet market demand, square lithium batteries are often connected in series or parallel to form battery modules for use.

[0003] After production and processing, lithium battery modules need to be subjected to extrusion testing. A search has revealed that a Chinese patent application numbered CN202120663720.1 discloses a battery module extrusion testing device. The overall structure comprises a base, a mounting mechanism, and an extrusion portion. The mounting mechanism is detachably mounted on the base, and the mounting mechanism is provided with a fixing portion for fixing the battery module to be tested on the top of the mounting mechanism. The mounting mechanism, to which the battery module is fixed, can be removed from the base to form a support structure at the bottom of the battery module. The extrusion portion has an extrusion head that is driven and movable, and the extrusion head is arranged corresponding to the end to be extruded of the battery module to be tested, so as to form an extrusion on the end to be extruded.

[0004] Although the device can conveniently disassemble and install the battery module to be tested, the test is not comprehensive enough, which leads to inaccurate test results. Therefore, we propose a lithium battery module extrusion test device to solve the above problem. Utility Model Content

[0005] The purpose of the present invention is to provide a lithium battery module extrusion testing device to solve the problems raised in the above background technology.

[0006] The top of the rotary drum is provided with an external threaded cylinder, and the external threaded cylinder and the rotary drum are both rotated and sleeved on the rotary shaft, and the top of the rotary drum is rotatably connected to the top plate and the end portion is fixedly connected to the output shaft of the servo motor, and the servo motor is fixedly mounted on the top of the top plate, and the four corners of the bottom end of the top plate are respectively fixedly connected to one end of the support column, and the other end of the support column is fixedly connected to the workbench, and the outer sliding of the rotary shaft is engaged with the switching component, and the switching component is arranged between the external threaded cylinder and the rotary drum;

[0007] The external threaded barrel is connected to both sides of the movable plate through a threaded structure, the bottom end of the middle portion of the movable plate is fixedly connected to the pressure sensor, and the bottom of the pressure sensor is fixedly connected to the pressure plate.

[0008] Preferably, a hollow movable cavity 1 is provided in the middle of the workbench, and movable cavities 2 are connected to both sides of the movable cavity 1.

[0009] Preferably, the middle part of the bidirectional screw is fixedly sleeved with a worm wheel, the worm wheel is rotatably arranged in the movable chamber one, the bottom of the worm wheel is meshedly connected to the worm, the worm is fixedly connected to the transmission rod, the transmission rod is rotatably installed in the movable chamber two, and one end of the transmission rod is connected to a rotating drum through a bevel gear transmission.

[0010] Preferably, the rotating cylinder and the externally threaded cylinder have opposite end surfaces respectively provided with a clamping groove.

[0011] Preferably, the switching assembly includes a switching plate, a card block, a sliding cylinder, an adsorption block, a support slide rod, a fixed plate, a spring, an upper electromagnetic block, and a lower electromagnetic block. The sliding cylinder is slidably connected to the rotating shaft, the middle of the sliding cylinder is rotatably connected to one end of the switching plate, and the other end of the switching plate is slidably connected to the supporting slide rod, the bottom end of the supporting slide rod is fixedly connected to the workbench, and the top end of the supporting slide rod is fixedly connected to the fixed plate. Springs are respectively provided on the top and bottom sides of the switching plate, and the springs are movably sleeved outside the supporting slide rod. The top and bottom sides of the sliding cylinder are respectively fixedly sleeved with card blocks, and the card blocks are engaged with the card slots.

[0012] Preferably, the middle of the switching plate is fixedly connected to the adsorption block, the top of the adsorption block is provided with an upper electromagnetic block fixed to the fixed plate, and the bottom of the adsorption block is provided with a lower electromagnetic block fixed to the workbench.

[0013] Compared with the existing technology, the beneficial effects of the present invention are: the two sides of the lithium battery module are clamped and fixed by the splint to prevent displacement during the extrusion test, and at the same time the splint pages can perform extrusion tests on the two sides of the lithium battery; by pressing down the movable plate, the top position of the lithium battery is extruded and tested, which increases the comprehensiveness of the test and improves the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure in the middle.

[0018] In the figure: workbench 1, support column 2, top plate 3, servo motor 4, external threaded cylinder 5, movable plate 6, pressure sensor 7, pressure plate 8, switching assembly 9, switching plate 91, clamping block 92, sliding cylinder 93, adsorption block 94, supporting slide rod 95, fixed plate 96, spring 97, upper electromagnetic block 98, lower electromagnetic block 99, rotating cylinder 10, clamping slot 101, slide slot 11, splint 12, bidirectional screw 13, worm gear 131, worm 132, movable chamber 1 14, rotating shaft 15, movable chamber 2 16, transmission rod 17, slider 18. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] Reference Figure 1 、 2, which is the first embodiment of the present utility model, and provides a lithium battery module extrusion testing device, including a workbench 1, with two concave grooves 11 on both sides of the top of the workbench 1, a slider 18 is slidably connected in the slide groove 11, and the top of the slider 18 is fixedly connected to the splint 12, and the slider 18 is connected to the bidirectional screw 13 through a threaded structure, and the bidirectional screw 13 is rotatably installed in the slide groove 11, and the bidirectional screw 13 is driven to connect the rotating drum 10, and the rotating drum 10 is rotatably connected to the other two sides of the top of the workbench 1. The top of the rotating drum 10 is provided with an externally threaded cylinder 5, and the externally threaded cylinder 5 and the rotating drum 10 are both rotated and sleeved with a rotating shaft 15. The top of the rotating shaft 15 is rotatably connected to the top plate 3 and the end is fixedly connected to the output shaft of the servo motor 4. The servo motor 4 is fixedly installed on the top of the top plate 3. The four corners of the bottom end of the top plate 3 are respectively fixedly connected to one end of the support column 2, and the other end of the support column 2 is fixedly connected to the workbench 1. The outer sliding clamping switch component 9 of the rotating shaft 15 is provided between the externally threaded cylinder 5 and the rotating drum 10;

[0022] The external threaded barrel 5 is connected to both sides of the movable plate 6 through a threaded structure. The bottom end of the middle portion of the movable plate 6 is fixedly connected to the pressure sensor 7 , and the bottom of the pressure sensor 7 is fixedly connected to the pressure plate 8 .

[0023] The lithium battery module is placed on the workbench 1, the switching component 9 works and is connected with the rotating drum 10, and then the servo motor 4 works synchronously to drive the rotating shaft 15 to rotate, the rotating shaft 15 drives the switching component 9 to work, and then drives the rotating drum 10 to rotate, and a rotating drum 10 drives the transmission rod 17 to rotate through the bevel gear transmission, and the transmission rod 17 drives the fixed worm 132 to rotate, and the worm 132 drives the meshing worm wheel 131 to rotate, and the worm wheel 131 drives the bidirectional screw 13 to rotate, and the bidirectional screw 13 then drives the slider 18 to move in the slide groove 11, and the slider 18 drives the fixed splint 12 to move toward the lithium battery module, and the splint 12 is pressed against the lithium battery. The battery module is clamped, and a pressure sensor can be fixedly installed on the opposite side of the splint 12. When the splint 12 clamps the lithium battery module, an extrusion test is performed on both sides of the lithium battery module. When the top of the lithium battery needs to be tested, the servo motor 4 stops, the switching component 9 works, and is clamped with the external threaded barrel 5. The servo motor 4 works and drives the external threaded barrel 5 to rotate synchronously through the cooperation of various components. The external threaded barrel 5 drives the movable plate 6 to press down through the threaded structure, and the movable plate 6 drives the pressure plate 8 to squeeze the lithium battery module. The pressure value generated by the extrusion is transmitted to the pressure sensor 7, which is convenient for checking and recording the extrusion force.

[0024] Example 2

[0025] Reference Figure 1-4 , which is the second embodiment of the present utility model, is based on the previous embodiment. Specifically, a hollow movable cavity 14 is provided in the middle of the workbench 1, and movable cavities 16 are connected to both sides of the movable cavity 14 to provide rotation space for the bevel gear transmission structure.

[0026] Specifically, the middle part of the bidirectional screw 13 is fixedly sleeved with a worm gear 131, and the worm gear 131 is rotatably arranged in the movable chamber 14. The bottom of the worm gear 131 is meshed with a worm 132, and the worm 132 is fixedly connected to the transmission rod 17. The transmission rod 17 is rotatably installed in the movable chamber 2 16, and one end of the transmission rod 17 is connected to a rotating drum 10 through a bevel gear transmission.

[0027] Specifically, a clamping groove 101 is respectively formed on the opposite end surfaces of the rotating cylinder 10 and the externally threaded cylinder 5 .

[0028] A rotating drum 10 drives a transmission rod 17 to rotate through a bevel gear transmission, and the transmission rod 17 drives a fixed worm 132 to rotate, and the worm 132 drives a meshing worm wheel 131 to rotate, and the worm wheel 131 drives a bidirectional screw 13 to rotate, and the bidirectional screw 13 then drives the slider 18 to move in the slide groove 11, and the slider 18 drives the fixed splint 12 to move toward the lithium battery module, and the splint 12 clamps the lithium battery module. At the same time, a pressure sensor can be fixedly installed on the opposite side of the splint 12. When the splint 12 clamps the lithium battery module, an extrusion test is performed on both sides of the lithium battery module.

[0029] Specifically, the switching assembly 9 includes a switching plate 91, a card block 92, a sliding cylinder 93, an adsorption block 94, a support slide rod 95, a fixed plate 96, a spring 97, an upper electromagnetic block 98, and a lower electromagnetic block 99. The sliding cylinder 93 is slidably connected to the rotating shaft 15. The middle part of the sliding cylinder 93 is rotated to connect one end of the switching plate 91, and the other end of the switching plate 91 is slidably connected to the supporting slide rod 95. The bottom end of the supporting slide rod 95 is fixedly connected to the workbench 1, and the top end of the supporting slide rod 95 is fixedly connected to the fixed plate 96. Springs 97 are respectively provided on the top and bottom sides of the switching plate 91. The spring 97 is movably sleeved on the outside of the support slide rod 95. The top and bottom sides of the sliding cylinder 93 are respectively fixedly sleeved with the card block 92, and the card block 92 is engaged with the card slot 101.

[0030] Furthermore, the middle of the switching plate 91 is fixedly connected to the adsorption block 94 , the top of the adsorption block 94 is provided with an upper electromagnetic block 98 fixed to the fixing plate 96 , and the bottom of the adsorption block 94 is provided with a lower electromagnetic block 99 fixed to the workbench 1 .

[0031] When the switching assembly 9 works, the lower electromagnetic block 99 is energized to generate magnetism, and the lower electromagnetic block 99 magnetically attracts the adsorption block 94, and the adsorption block 94 drives the switching plate 91 to move downward, and the switching plate 91 drives the sliding cylinder 93 to move downward, and the sliding cylinder 93 drives the fixed block 92 to move downward, and the block 92 is inserted into the slot 101 of the rotating cylinder 10; the upper electromagnetic block 98 is energized to generate magnetism, and the upper electromagnetic block 98 drives the adsorption block 94 to move upward, and the adsorption block 94 drives the switching plate 91 to move upward, and the switching plate 91 then drives the sliding cylinder 93 and the block 92 to move upward, and the block 92 is inserted into the slot 101 of the external threaded cylinder 5, thereby realizing the replacement of the test position of the lithium battery module.

[0032] Example 3

[0033] Reference Figure 1-4 , which is the third embodiment of the present utility model. This embodiment is based on the above two embodiments. During the test, the lithium battery module is placed on the workbench 1, the switching component 9 works, the lower electromagnetic block 99 is energized to generate magnetism, the lower electromagnetic block 99 magnetically attracts the adsorption block 94, and the adsorption block 94 drives the switching plate 91 to move downward, the switching plate 91 drives the sliding cylinder 93 to move downward, the sliding cylinder 93 drives the fixed block 92 to move downward, and the block 92 is stuck in the slot 101 of the rotating drum 10, and then the servo motor 4 works synchronously to drive the rotating shaft 15 to rotate, the rotating shaft 15 drives the switching component 9 to work, the sliding cylinder 93 rotates, the sliding cylinder 93 drives the block 92 to rotate, and the block 92 further drives the rotating drum 10 to rotate, and one rotating drum 10 drives the transmission rod 17 to rotate through the bevel gear transmission, the transmission rod 17 drives the fixed worm 132 to rotate, the worm 132 drives the meshing worm gear 131 to rotate, the worm gear 131 drives the bidirectional screw 13 to rotate, and the bidirectional screw 13 further drives the slider 18 in the slide groove 11 When the clamping plate 12 is clamped, the clamping plate 12 is pressed against the outer surface of the outer surface of the battery pack to test the pressure on the inner surface of the battery pack.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery module extrusion testing device, comprising a workbench (1), characterized in that: The top sides of the workbench (1) are respectively provided with a groove (11), the slide block (18) is slidably connected in the groove (11), the top of the slide block (18) is fixedly connected to the splint (12), the slide block (18) is connected to the bidirectional screw (13) through a threaded structure, the bidirectional screw (13) is rotatably installed in the groove (11), the bidirectional screw (13) is driven to connect the rotating drum (10), the rotating drum (10) is rotatably connected to the other two sides of the top of the workbench (1), the top of the rotating drum (10) is rotatably provided with an external threaded drum (5), the The external threaded barrel (5) and the rotating barrel (10) are both rotatably connected to the rotating shaft (15), the top of the rotating shaft (15) is rotatably connected to the top plate (3) and the end thereof is fixedly connected to the output shaft of the servo motor (4), the servo motor (4) is fixedly installed on the top of the top plate (3), the four corners of the bottom end of the top plate (3) are respectively fixedly connected to one end of the support column (2), the other end of the support column (2) is fixedly connected to the workbench (1), the rotating shaft (15) is externally slidably connected to the switching assembly (9), and the switching assembly (9) is arranged between the external threaded barrel (5) and the rotating barrel (10); The external threaded barrel (5) is connected to both sides of the movable plate (6) via a threaded structure. The bottom end of the middle portion of the movable plate (6) is fixedly connected to a pressure sensor (7). The bottom of the pressure sensor (7) is fixedly connected to a pressure plate (8).

2. A lithium battery module extrusion testing device according to claim 1, characterized in that: The middle of the workbench (1) is hollowed out to form an active cavity 1 (14), and both sides of the active cavity 1 (14) are connected to active cavity 2 (16).

3. A lithium battery module extrusion testing device according to claim 2, characterized in that: The middle part of the bidirectional screw (13) is fixedly sleeved with a worm wheel (131), and the worm wheel (131) is rotatably arranged in the movable chamber (14). The bottom of the worm wheel (131) is meshedly connected with a worm (132), and the worm (132) is fixedly connected with a transmission rod (17), and the transmission rod (17) is rotatably installed in the movable chamber (16). One end of the transmission rod (17) is connected to a rotating drum (10) through a bevel gear transmission.

4. The lithium battery module extrusion testing device according to claim 1, characterized in that: The rotating cylinder (10) and the externally threaded cylinder (5) have opposite end surfaces each provided with a clamping groove (101).

5. The lithium battery module extrusion testing device according to claim 4, characterized in that: The switching assembly (9) comprises a switching plate (91), a card block (92), a sliding cylinder (93), an adsorption block (94), a support slide rod (95), a fixed plate (96), a spring (97), an upper electromagnetic block (98), and a lower electromagnetic block (99); the sliding cylinder (93) is slidably connected to the rotating shaft (15); the middle part of the sliding cylinder (93) is rotatably connected to one end of the switching plate (91); the other end of the switching plate (91) is slidably connected to the support slide rod (95); the bottom end of the support slide rod (95) is fixedly connected to the workbench (1); the top end of the support slide rod (95) is fixedly connected to the fixed plate (96); springs (97) are respectively provided on the top and bottom sides of the switching plate (91); the springs (97) are movably sleeved outside the support slide rod (95); the top and bottom sides of the sliding cylinder (93) are respectively fixedly sleeved with the card block (92); the card block (92) is engaged with the card slot (101).

6. The lithium battery module extrusion testing device according to claim 5, characterized in that: The middle of the switching plate (91) is fixedly connected to an adsorption block (94); the top of the adsorption block (94) is provided with an upper electromagnetic block (98) fixed to a fixed plate (96); and the bottom of the adsorption block (94) is provided with a lower electromagnetic block (99) fixed to a workbench (1).

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