Lithium ion cylindrical battery voltage internal resistance testing device

Abstract

The invention relates to the technical field of lithium ion cylindrical batteries, and discloses a lithium ion cylindrical battery voltage internal resistance testing device which comprises a workbench, a supporting frame fixedly connected to the top of the workbench, a baffle fixedly connected to the top of the inner wall of the supporting frame, a conveying frame fixedly connected to one side of the supporting frame, and an internal resistance testing mechanism. When a clamping plate clamps a battery, the clamping plate drives a round shell to move towards the interior of a fixed shell under the counter-acting force of the battery, the round shell drives a sliding plate to move, and when the sliding plate slides in the fixed shell, air flow in the fixed shell enters the interior of the round shell through a round hole; the air flow pushes the moving block in the round shell, the moving block drives the test probe to move, and the test probe is in contact with the side wall of the battery in the moving process, so that the voltage internal resistance of the battery is tested.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion cylindrical batteries, in particular to a voltage internal resistance testing device for lithium-ion cylindrical batteries. Background Art

[0002] Lithium-ion cylindrical batteries are a common type of lithium battery, primarily used in applications such as portable electronic devices and power tools. Their core structure is encapsulated in a cylindrical casing and uses lithium ions as the battery's charge carrier. Voltage internal resistance testing of lithium-ion cylindrical batteries is an essential step in the battery production process, and its efficiency impacts the efficiency of the entire battery production process.

[0003] In the existing technology, lithium-ion cylindrical batteries are usually tested by conveyor belts. After the test, an artificial voltage internal resistance is electronically input. During the conveyor belt transportation, the lithium-ion cylindrical batteries may bump on the conveyor belt, causing the position of the lithium-ion cylindrical batteries to shift, affecting the accuracy of the lithium-ion cylindrical battery resistance test. Summary of the Invention

[0004] The object of the present invention is to provide a voltage internal resistance testing device for lithium-ion cylindrical batteries to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a lithium-ion cylindrical battery voltage internal resistance testing device, comprising a workbench, a support frame fixedly connected to the top of the workbench, a baffle fixedly connected to the top of the inner wall of the support frame, a conveyor frame fixedly connected to one side of the support frame, and an internal resistance testing mechanism, the internal resistance testing mechanism comprising a motor, a rotating shaft, a special-shaped conveying roller, a fixed disk, and a clamping assembly for clamping the battery, one end of the motor fixedly connected to one side of the outer wall of the support frame, one end of the rotating shaft fixedly connected to the output end of the motor, the inner wall of the special-shaped conveying roller fixedly connected to the middle end of the outer wall of the rotating shaft, two fixed disks are provided, and the inner walls of the two fixed disks are respectively fixedly connected to the outer walls of both ends of the rotating shaft.

[0006] Furthermore, the clamping assembly includes a belt rotatably connected to the outer wall of the fixed disk, the inner wall of one end of the belt away from the fixed disk is rotatably connected to a rotating frame, one end of the rotating frame passes through the support frame and is rotatably connected to the inner wall of the support frame, the outer wall of the rotating frame is fixedly connected to a reciprocating screw, and the outer wall of one end of the reciprocating screw is threadedly connected to a threaded plate.

[0007] Furthermore, the bottom of the threaded plate is slidably connected to the top of the workbench, the side wall of the threaded plate is fixedly connected to the connecting plate, the top inner wall of the connecting plate is fixedly connected to the fixed shell, one side of the inner wall of the fixed shell is fixedly connected to the first spring, and one end of the first spring is fixedly connected to the sliding plate.

[0008] Furthermore, the outer wall of the sliding plate is slidably connected to the inner wall of the fixed shell, the inner wall of the sliding plate is fixedly connected to a circular shell, one end of the circular shell passes through the fixed shell and extends to the outside of the fixed shell, and the outer wall of the circular shell away from the sliding plate is fixedly connected to a clamping plate.

[0009] Furthermore, a test assembly is provided on the inner wall of the circular shell, and the test assembly includes a second spring fixedly connected to one side of the inner wall of the circular shell, one end of the second spring is fixedly connected to a moving block, the outer wall of the moving block is slidably connected to the inner wall of the circular shell, and the end of the moving block away from the second spring is fixedly connected to a test probe, and a circular hole is opened on the side of the inner wall of the circular shell close to the second spring.

[0010] Furthermore, a cooling component is provided on the top of the workbench, and the cooling component includes a special-shaped shell fixedly connected to the center of the top of the workbench, the inner wall of the special-shaped shell is slidably connected to a square plate, one side of the square plate is fixedly connected to a sliding frame, one end of the sliding frame passes through the special-shaped shell and extends to the outside of the special-shaped shell, and a reset spring is fixedly connected to the side of the square plate close to the sliding frame.

[0011] Furthermore, one end of the return spring is fixedly connected to one side of the inner wall of the special-shaped shell, and the side of the square plate away from the sliding frame is fixedly connected to the sliding shell frame. One end of the sliding shell frame passes through the special-shaped shell and extends to the outside of the special-shaped shell. A plurality of exhaust holes are opened on one side of the outer wall of the sliding shell frame, and a plurality of air intake holes are opened on the outer wall of the end of the sliding shell frame close to the square plate. A cooler is fixedly connected to the bottom of the inner wall of the special-shaped shell.

[0012] Furthermore, a side of the connecting plate away from the threaded plate is fixedly connected to a cross bar, one end of the cross bar is rotatably connected to a rotating plate, and an end of the rotating plate away from the cross bar is rotatably connected to an extrusion plate. The extrusion plate is provided with a limiting rod that is slidably connected to the inner wall of the extrusion plate, and the bottom of the limiting rod is fixedly connected to the top of the workbench.

[0013] Furthermore, the side wall of the square plate is provided with an auxiliary component, which includes a rotating bar rotatably connected to both ends of the square plate close to the sliding frame, one end of the rotating bar is rotatably connected to the slider, and a limiting groove is opened at the bottom of the inner wall of the special-shaped shell.

[0014] Furthermore, the bottom end of the slider is slidably connected to the inner wall of the limit groove, one end of the slider is fixedly connected to a connecting rod, the end of the connecting rod away from the slider is fixedly connected to a vertical rod, the top of the vertical rod is fixedly connected to an inclined plate, and limit holes are respectively opened on both sides of the top of the conveying frame, and the top outer wall of the vertical rod is slidably connected to the inner wall of the limit hole.

[0015] The present invention has the following beneficial effects: (1) The present invention places multiple batteries on the top of the conveyor frame, starts the motor, and the motor drives the rotating shaft to rotate slowly, and the rotating shaft drives the special-shaped conveyor roller to rotate. Due to the multiple grooves set by the special-shaped conveyor roller, the batteries will be stuck inside the grooves of the special-shaped conveyor roller, thereby performing spacing conveying on the batteries. When the special-shaped conveyor roller rotates a quarter, the rotating shaft drives the fixed disk to rotate, the fixed disk drives the belt to rotate, the belt drives the rotating frame to rotate, the rotating frame drives the reciprocating screw to rotate, and the reciprocating screw drives the threaded plate to perform a complete reciprocating movement path. When the battery in the groove of the special-shaped conveyor roller moves to the position of the conveyor frame, the threaded plate drives the connecting plate to move, the connecting plate drives the fixed shell to move, and the fixed shell belt The movable sliding plate moves, the sliding plate drives the round shell to move, the round shell drives the clamping plate to move, and the two clamping plates approach each other, thereby clamping the battery close to the conveyor rack, improving the stability during battery testing, and improving the accuracy of battery internal resistance testing. When the clamping plate clamps the battery, it is subjected to the reaction force of the battery, causing the clamping plate to drive the round shell to move toward the inside of the fixed shell, and the round shell drives the sliding plate to move. When the sliding plate slides inside the fixed shell, the airflow inside the fixed shell enters the inside of the round shell through the circular hole. The airflow pushes the moving block inside the round shell, and the moving block drives the test probe to move. During the movement of the test probe, it will come into contact with the side wall of the battery, thereby testing the voltage internal resistance of the battery.

[0016] (2) In the present invention, during the movement of the connecting plate, the connecting plate drives the cross bar to move, and the cross bar drives the rotating plate to move. The rotating plate is limited by the limit rod, and the extrusion plate slides along the outer wall of the limit rod. During the movement of the extrusion plate, the extrusion plate contacts the side wall of the sliding frame and squeezes the sliding frame. The sliding frame drives the square plate to slide along the inside of the special-shaped shell, and the square plate drives the sliding shell frame to move. During the movement of the sliding shell frame, the sliding shell frame contacts the battery near the conveying frame and squeezes the battery, thereby preventing the battery from falling off during the test, improving the stability of the battery test, and improving the accuracy of the battery test.

[0017] (3) In the present invention, when the square plate moves inside the special-shaped shell, the air flow inside the special-shaped shell is squeezed, and the air flow inside the special-shaped shell is cooled by the setting of the cooler. At this time, the cold air enters the interior of the sliding shell through the setting of the air inlet hole, and the cold air flow enters the interior of the exhaust hole through the sliding shell frame. The cold air flow is sprayed toward the outer wall of the battery under test through the exhaust hole to cool the battery, prevent local overheating during the battery test, and indirectly improve the accuracy of the battery test.

[0018] (4) In the present invention, when the square plate approaches the cooler, the square plate drives the rotating bar to move, which is limited by the limiting groove. The rotating bar drives the slider to slide along the inner wall of the limiting groove. The slider drives the connecting rod to move, the connecting rod drives the vertical rod to move, and the vertical rod drives the inclined plate to slide along the inner wall of the limiting hole. The two inclined plates approach each other, thereby clamping a stack of batteries on the top of the conveyor rack, preventing the batteries from shifting at the top of the conveyor rack, improving the conveying stability of the special-shaped conveyor roller on the batteries, and indirectly improving the accuracy of the battery test.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the overall top view of the structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the side structure of the fixed disk of the present invention; Figure 4 This is a schematic diagram of the side structure of the connecting plate of the present invention; Figure 5 This is a schematic cross-sectional view of the sliding housing frame of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the rotating bar of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the fixed shell of the present invention; Figure 8 For the present invention Figure 3 A magnified view of middle A; Figure 9 For the present invention Figure 5 Enlarged view of middle B; Figure 10 For the present invention Figure 6 Enlarged view of C in the middle.

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Workbench; 2. Support frame; 3. Baffle; 4. Conveyor frame; 5. Internal resistance test mechanism; 51. Motor; 52. Rotating shaft; 53. Special-shaped conveyor roller; 54. Fixed plate; 55. Clamping assembly; 56. Test assembly; 57. Cooling assembly; 58. Auxiliary assembly; 551. Belt; 552. Rotating frame; 553. Reciprocating screw; 554. Threaded plate; 555. Connecting plate; 556. Fixed housing; 557. First spring; 558. Sliding plate; 559. Round housing; 5510. Clamping plate; 561 , second spring; 562, round hole; 563, moving block; 564, test probe; 571, special-shaped shell; 572, square plate; 573, sliding frame; 574, return spring; 575, sliding shell frame; 576, exhaust hole; 577, air inlet; 578, cooler; 579, cross bar; 5710, rotating plate; 5711, extrusion plate; 5712, limit rod; 581, rotating bar; 582, limit groove; 583, slider; 584, connecting rod; 585, vertical rod; 586, inclined plate; 587, limit hole. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0024] Example 1, please refer to Figures 1-10 As shown, the present invention is a lithium-ion cylindrical battery voltage internal resistance test device, comprising a workbench 1, a support frame 2 is fixedly connected to the top of the workbench 1, a baffle 3 is fixedly connected to the top of the inner wall of the support frame 2, and a conveyor frame 4 is fixedly connected to one side of the support frame 2, and further comprising; Internal resistance testing mechanism 5, the internal resistance testing mechanism 5 includes a motor 51, a rotating shaft 52, a special-shaped conveying roller 53, a fixed plate 54, and a clamping assembly 55 for clamping the battery; One end of the motor 51 is fixedly connected to one side of the outer wall of the support frame 2, one end of the rotating shaft 52 is fixedly connected to the output end of the motor 51, and the inner wall of the special-shaped conveying roller 53 is fixedly connected to the middle end of the outer wall of the rotating shaft 52. Multiple batteries are placed on the top of the conveying frame 4, and the motor 51 is started. The motor 51 drives the rotating shaft 52 to rotate slowly, and the rotating shaft 52 drives the special-shaped conveying roller 53 to rotate. Due to the multiple grooves set on the special-shaped conveying roller 53, the batteries will be stuck in the grooves of the special-shaped conveying roller 53, thereby performing spacing conveying on the batteries. Two fixed disks 54 are provided, and the inner walls of the two fixed disks 54 are respectively fixedly connected to the outer walls of the two ends of the rotating shaft 52.

[0025] The clamping assembly 55 includes a belt 551 rotatably connected to the outer wall of the fixed disk 54, and the inner wall of one end of the belt 551 away from the fixed disk 54 is rotatably connected to a rotating frame 552, one end of the rotating frame 552 passes through the support frame 2 and is rotatably connected to the inner wall of the support frame 2, the outer wall of the rotating frame 552 is fixedly connected to a reciprocating screw rod 553, and the outer wall of one end of the reciprocating screw rod 553 is threadedly connected to a threaded plate 554.

[0026] The bottom of the threaded plate 554 is slidably connected to the top of the workbench 1, the side wall of the threaded plate 554 is fixedly connected to the connecting plate 555, the top inner wall of the connecting plate 555 is fixedly connected to the fixed shell 556, one side of the inner wall of the fixed shell 556 is fixedly connected to the first spring 557, and one end of the first spring 557 is fixedly connected to the sliding plate 558.

[0027] The outer wall of the sliding plate 558 is slidably connected to the inner wall of the fixed shell 556. The inner wall of the sliding plate 558 is fixedly connected to a circular shell 559. One end of the circular shell 559 passes through the fixed shell 556 and extends to the outside of the fixed shell 556. The outer wall of the circular shell 559 away from the sliding plate 558 is fixedly connected to a clamping plate 5510. When the special-shaped conveying roller 53 rotates a quarter, the rotating shaft 52 drives the fixed disk 54 to rotate, the fixed disk 54 drives the belt 551 to rotate, the belt 551 drives the rotating frame 552 to rotate, the rotating frame 552 drives the reciprocating screw rod 553 to rotate, and the reciprocating screw rod 553 rotates. 3 drives the threaded plate 554 to perform a complete reciprocating movement path. When the battery in the groove of the special-shaped conveying roller 53 moves to the position of the conveying rack 4, the threaded plate 554 drives the connecting plate 555 to move, the connecting plate 555 drives the fixed shell 556 to move, the fixed shell 556 drives the sliding plate 558 to move, the sliding plate 558 drives the round shell 559 to move, the round shell 559 drives the clamping plate 5510 to move, and the two clamping plates 5510 move closer to each other, thereby clamping the battery close to the conveying rack 4, improving the stability during battery testing and improving the accuracy of battery internal resistance testing.

[0028] The inner wall of the circular shell 559 is provided with a test assembly 56. When the clamping plate 5510 clamps the battery, it is subjected to the reaction force of the battery, causing the clamping plate 5510 to drive the circular shell 559 to move toward the interior of the fixed shell 556. The circular shell 559 drives the sliding plate 558 to move. When the sliding plate 558 slides inside the fixed shell 556, the air flow inside the fixed shell 556 enters the interior of the circular shell 559 through the circular hole 562. The air flow pushes the moving block 563 inside the circular shell 559, and the moving block 563 drives the test probe 564. During the movement, the test probe 564 will come into contact with the side wall of the battery, thereby testing the voltage internal resistance of the battery. The test component 56 includes a second spring 561 fixedly connected to one side of the inner wall of the circular shell 559, and one end of the second spring 561 is fixedly connected to a moving block 563. The outer wall of the moving block 563 is slidably connected to the inner wall of the circular shell 559, and the end of the moving block 563 away from the second spring 561 is fixedly connected to the test probe 564. A circular hole 562 is provided on the inner wall of the circular shell 559 close to the second spring 561.

[0029] In embodiment 2, a cooling component 57 is provided on the top of the workbench 1. During the movement of the connecting plate 555, the connecting plate 555 drives the cross bar 579 to move, and the cross bar 579 drives the rotating plate 5710 to move. The rotating plate 5710 is limited by the limiting rod 5712, and the rotating plate 5710 drives the extrusion plate 5711 to slide along the outer wall of the limiting rod 5712. During the movement of the extrusion plate 5711, it contacts the side wall of the sliding frame 573, squeezing the sliding frame 573. The sliding frame 573 drives the square plate 572 to slide along the inside of the special-shaped shell 571, and the square plate 572 drives the sliding shell frame 575 to move. During the movement of the sliding shell frame 575, it will come into contact with the batteries near the conveyor frame 4, squeezing the batteries to prevent them from falling off during the battery test, thereby improving the stability of the battery test and the accuracy of the battery test. The cooling component 57 includes a special-shaped shell 571 fixedly connected to the top center of the workbench 1, and the inner wall of the special-shaped shell 571 is slidably connected to a square plate 572. One side of the square plate 572 is fixedly connected to a sliding frame 573. One end of the sliding frame 573 passes through the special-shaped shell 571 and extends to the outside of the special-shaped shell 571. A return spring 574 is fixedly connected to the side of the square plate 572 near the sliding frame 573.

[0030] One end of the return spring 574 is fixedly connected to one side of the inner wall of the special-shaped shell 571, and the side of the square plate 572 away from the sliding frame 573 is fixedly connected to the sliding frame 575. One end of the sliding frame 575 passes through the special-shaped shell 571 and extends to the outside of the special-shaped shell 571. A number of exhaust holes 576 are opened on one side of the outer wall of the sliding frame 575, and a number of air inlet holes 577 are opened on the outer wall of the end of the sliding frame 575 close to the square plate 572. A cooler 578 is fixedly connected to the bottom of the inner wall of the special-shaped shell 571.

[0031] A crossbar 579 is fixedly connected to the side of the connecting plate 555 away from the threaded plate 554, and one end of the crossbar 579 is rotatably connected to a rotating plate 5710, and the end of the rotating plate 5710 away from the crossbar 579 is rotatably connected to an extrusion plate 5711, which is provided with a. The inner wall of the extrusion plate 5711 is slidably connected to a limit rod 5712, and the bottom of the limit rod 5712 is fixedly connected to the top of the workbench 1. When the square plate 572 moves inside the special-shaped shell 571, the air flow inside the special-shaped shell 571 is squeezed, and the air flow inside the special-shaped shell 571 is cooled by the setting of the cooler 578. At this time, the cold air enters the interior of the sliding housing frame 575 through the setting of the air inlet hole 577, and the cold air enters the interior of the exhaust hole 576 through the sliding housing frame 575. The cold air is ejected toward the outer wall of the battery under test through the exhaust hole 576 to cool the battery, thereby preventing local overheating during the battery test and improving the accuracy of the battery test.

[0032] The side wall of the square plate 572 is provided with an auxiliary component 58. When the square plate 572 approaches the cooler 578, the square plate 572 drives the rotating bar 581 to move. The rotating bar 581 is limited by the limiting groove 582, and the sliding block 583 is driven to slide along the inner wall of the limiting groove 582. The sliding block 583 drives the connecting rod 584 to move. The connecting rod 584 drives the vertical rod 585 to move. The vertical rod 585 drives the inclined plate 586 to slide along the inner wall of the limiting hole 587. The inclined plates 586 are moved closer to each other, thereby clamping a pile of batteries on the top of the conveyor rack 4, preventing the batteries from shifting on the top of the conveyor rack 4, improving the conveying stability of the special-shaped conveyor roller 53 on the batteries, and improving the accuracy of the battery test. The auxiliary component 58 includes a rotating bar 581 rotatably connected to both ends of the square plate 572 near the sliding rack 573, one end of the rotating bar 581 is rotatably connected to the slider 583, and a limiting groove 582 is provided at the bottom of the inner wall of the special-shaped shell 571.

[0033] The bottom end of the slider 583 is slidably connected to the inner wall of the limiting groove 582, one end of the slider 583 is fixedly connected to the connecting rod 584, the end of the connecting rod 584 away from the slider 583 is fixedly connected to the vertical rod 585, the top of the vertical rod 585 is fixedly connected to the inclined plate 586, and limiting holes 587 are respectively provided on both sides of the top of the conveying frame 4, and the top outer wall of the vertical rod 585 is slidably connected to the inner wall of the limiting hole 587.

[0034] When in use, multiple batteries are placed on the top of the conveying rack 4, and the motor 51 is started. The motor 51 drives the rotating shaft 52 to rotate slowly, and the rotating shaft 52 drives the special-shaped conveying roller 53 to rotate. Due to the multiple grooves set by the special-shaped conveying roller 53, the batteries will be stuck in the grooves of the special-shaped conveying roller 53, thereby performing spacing conveying on the batteries. When the special-shaped conveying roller 53 rotates a quarter, the rotating shaft 52 drives the fixed plate 54 to rotate, the fixed plate 54 drives the belt 551 to rotate, the belt 551 drives the rotating rack 552 to rotate, the rotating rack 552 drives the reciprocating screw rod 553 to rotate, and the reciprocating screw rod 553 drives the threaded plate 554 to perform a complete reciprocating movement path. When the batteries in the grooves of the special-shaped conveying roller 53 move to the position of the conveying rack 4, the threaded plate 554 drives the connecting plate 555 to move, the connecting plate 555 drives the fixed shell 556 to move, and the fixed shell 556 drives the sliding plate 55 8 moves, the sliding plate 558 drives the circular shell 559 to move, and the circular shell 559 drives the clamping plate 5510 to move, and the two clamping plates 5510 approach each other, thereby clamping the battery close to the conveyor rack 4, improving the stability of the battery test and the accuracy of the battery internal resistance test. When the clamping plate 5510 clamps the battery, it is subjected to the reaction force of the battery, so that the clamping plate 5510 drives the circular shell 559 to move toward the inside of the fixed shell 556, and the circular shell 559 drives the sliding plate 558 to move. When the sliding plate 558 slides inside the fixed shell 556, the airflow inside the fixed shell 556 enters the inside of the circular shell 559 through the setting of the circular hole 562, and the airflow pushes the moving block 563 inside the circular shell 559, and the moving block 563 drives the test probe 564 to move. During the movement of the test probe 564, it will come into contact with the side wall of the battery, thereby testing the voltage internal resistance of the battery.

[0035] During the movement of the connecting plate 555, the connecting plate 555 drives the cross bar 579 to move, and the cross bar 579 drives the rotating plate 5710 to move. Limited by the limit rod 5712, the rotating plate 5710 drives the extrusion plate 5711 to slide along the outer wall of the limit rod 5712. During the movement of the extrusion plate 5711, it will contact the side wall of the sliding frame 573 to squeeze the sliding frame 573. The sliding frame 573 drives the square plate 572 to slide along the inside of the special-shaped shell 571. The square plate 572 drives the sliding shell frame 575 to move. During the movement of the sliding shell frame 575, it will contact the battery near the conveying rack 4 to squeeze the battery, thereby preventing it from falling off during the battery test, thereby improving the stability of the battery test and the accuracy of the battery test.

[0036] When the square plate 572 moves inside the special-shaped shell 571, the airflow inside the special-shaped shell 571 is squeezed, and the airflow inside the special-shaped shell 571 is cooled by the setting of the cooler 578. At this time, the cold air enters the interior of the sliding shell frame 575 through the setting of the air inlet hole 577, and the cold air flow enters the interior of the exhaust hole 576 through the sliding shell frame 575. The cold air flow is sprayed toward the outer wall of the battery under test through the exhaust hole 576 to cool the battery, prevent local overheating during the battery test, and indirectly improve the accuracy of the battery test.

[0037] When the square plate 572 approaches the cooler 578, the square plate 572 drives the rotating bar 581 to move, and is limited by the limiting groove 582. The rotating bar 581 drives the slider 583 to slide along the inner wall of the limiting groove 582, and the slider 583 drives the connecting rod 584 to move. The connecting rod 584 drives the vertical rod 585 to move, and the vertical rod 585 drives the inclined plate 586 to slide along the inner wall of the limiting hole 587. The two inclined plates 586 approach each other, thereby clamping a stack of batteries on the top of the conveying rack 4 to prevent the batteries from shifting at the top of the conveying rack 4, thereby improving the conveying stability of the special-shaped conveying roller 53 on the batteries, and indirectly improving the accuracy of the battery test.

[0038] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lithium-ion cylindrical battery voltage internal resistance test device, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a support frame (2), and further comprises: An internal resistance testing mechanism (5), the internal resistance testing mechanism (5) comprising a motor (51), a rotating shaft (52), a special-shaped conveying roller (53), a fixed plate (54), and a clamping assembly (55) for clamping a battery; One end of the motor (51) is fixedly connected to one side of the outer wall of the support frame (2), one end of the rotating shaft (52) is fixedly connected to the output end of the motor (51), the inner wall of the special-shaped conveying roller (53) is fixedly connected to the middle end of the outer wall of the rotating shaft (52), and two fixed disks (54) are provided, and the inner walls of the two fixed disks (54) are respectively fixedly connected to the outer walls of both ends of the rotating shaft (52).

2. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 1, characterized in that: A baffle (3) is fixedly connected to the top of the inner wall of the support frame (2), and a conveying frame (4) is fixedly connected to one side of the support frame (2); The clamping assembly (55) comprises a belt (551) rotatably connected to the outer wall of the fixed disk (54); the inner wall of one end of the belt (551) away from the fixed disk (54) is rotatably connected to a rotating frame (552).

3. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 2, characterized in that: One end of the rotating frame (552) passes through the support frame (2) and is rotatably connected to the inner wall of the support frame (2); a reciprocating screw rod (553) is fixedly connected to the outer wall of the rotating frame (552); and a threaded plate (554) is threadedly connected to the outer wall of one end of the reciprocating screw rod (553).

4. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 3, characterized in that: The bottom of the threaded plate (554) is slidably connected to the top of the workbench (1); the side wall of the threaded plate (554) is fixedly connected to a connecting plate (555); the top inner wall of the connecting plate (555) is fixedly connected to a fixed shell (556); one side of the inner wall of the fixed shell (556) is fixedly connected to a first spring (557); and one end of the first spring (557) is fixedly connected to a sliding plate (558).

5. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 4, characterized in that: The outer wall of the sliding plate (558) is slidably connected to the inner wall of the fixed shell (556), and the inner wall of the sliding plate (558) is fixedly connected to a circular shell (559). One end of the circular shell (559) passes through the fixed shell (556) and extends to the outside of the fixed shell (556). The outer wall of the circular shell (559) at one end away from the sliding plate (558) is fixedly connected to a clamping plate (5510).

6. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 5, characterized in that: A test assembly (56) is provided on the inner wall of the circular shell (559), and the test assembly (56) includes a second spring (561) fixedly connected to one side of the inner wall of the circular shell (559), one end of the second spring (561) is fixedly connected to a moving block (563), the outer wall of the moving block (563) is slidably connected to the inner wall of the circular shell (559), and one end of the moving block (563) away from the second spring (561) is fixedly connected to a test probe (564), and a circular hole (562) is opened on the inner wall side of the circular shell (559) close to the second spring (561).

7. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 6, characterized in that: A cooling component (57) is provided on the top of the workbench (1), and the cooling component (57) includes a special-shaped shell (571) fixedly connected to the center of the top of the workbench (1), a square plate (572) is slidably connected to the inner wall of the special-shaped shell (571), a sliding frame (573) is fixedly connected to one side of the square plate (572), one end of the sliding frame (573) passes through the special-shaped shell (571) and extends to the outside of the special-shaped shell (571), and a return spring (574) is fixedly connected to the side of the square plate (572) close to the sliding frame (573).

8. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 7, characterized in that: One end of the return spring (574) is fixedly connected to one side of the inner wall of the special-shaped shell (571); a side of the square plate (572) away from the sliding frame (573) is fixedly connected to a sliding frame (575); one end of the sliding frame (575) passes through the special-shaped shell (571) and extends to the outside of the special-shaped shell (571); a plurality of exhaust holes (576) are opened on one side of the outer wall of the sliding frame (575); a plurality of air inlet holes (577) are opened on the outer wall of one end of the sliding frame (575) close to the square plate (572); and a cooler (578) is fixedly connected to the bottom of the inner wall of the special-shaped shell (571).

9. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 8, characterized in that: A side of the connecting plate (555) away from the threaded plate (554) is fixedly connected to a cross bar (579), one end of the cross bar (579) is rotatably connected to a rotating plate (5710), and one end of the rotating plate (5710) away from the cross bar (579) is rotatably connected to an extrusion plate (5711), the extrusion plate (5711) is provided with a limiting rod (5712) slidably connected to the inner wall of the extrusion plate (5711), and the bottom of the limiting rod (5712) is fixedly connected to the top of the workbench (1).

10. The lithium-ion cylindrical battery voltage internal resistance test device according to claim 9, characterized in that: An auxiliary component (58) is provided on the side wall of the square plate (572), and the auxiliary component (58) includes a rotating bar (581) rotatably connected to both ends of a side of the square plate (572) close to the sliding frame (573), one end of the rotating bar (581) is rotatably connected to a slider (583), and a limiting groove (582) is provided at the bottom of the inner wall of the special-shaped shell (571); The bottom end of the slider (583) is slidably connected to the inner wall of the limiting groove (582), one end of the slider (583) is fixedly connected to a connecting rod (584), the end of the connecting rod (584) away from the slider (583) is fixedly connected to a vertical rod (585), the top of the vertical rod (585) is fixedly connected to an inclined plate (586), and limiting holes (587) are respectively provided on both sides of the top of the conveying frame (4), and the outer wall of the top end of the vertical rod (585) is slidably connected to the inner wall of the limiting hole (587).

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