Withstand voltage test device for lithium ion battery thermal runaway risk research

Abstract

The utility model discloses a withstand voltage test device for lithium ion battery thermal runaway risk research, which comprises a workbench, a withstand voltage test mechanism is arranged on one side of the top of the workbench, a clamping mechanism is arranged on the outer side of the workbench, the clamping mechanism is used for clamping a lithium ion battery, and the clamping mechanism is used for clamping the lithium ion battery. The clamping mechanism comprises a placing frame, a driving assembly, a lifting assembly and a clamping jaw assembly, the placing frame is fixedly connected to the outer side of the workbench, and the driving assembly is used for driving the lifting assembly and the clamping jaw assembly to rotate. The two clamping jaws in the approaching state clamp the to-be-detected lithium ion battery placed on the placing frame into the detection box, and the two clamping jaws in the far-away state release the clamping of the lithium ion battery, so that the lithium ion battery can be conveniently clamped through a mechanical structure, the detection efficiency of the device on the lithium ion battery is effectively improved, and the detection efficiency of the device on the lithium ion battery is improved. And the workload of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery safety, in particular to a pressure-resistant test device for studying the thermal runaway hazard of lithium ion batteries. Background Art

[0002] Due to the special properties of lithium-ion batteries, when lithium-ion batteries are abused, a series of chain reactions will occur inside them, causing the temperature inside the battery to rise rapidly and produce a large amount of gas, which may cause thermal runaway of lithium-ion batteries, and then develop into serious fires or even explosions. In order to better prevent and control thermal runaway of lithium-ion batteries and their fires, it is necessary to study the thermal runaway mechanism, disaster characteristics and prevention methods of lithium-ion batteries.

[0003] In the existing pressure test device for studying the thermal runaway hazard of lithium-ion batteries, an operator manually places the lithium-ion battery inside a test box, and a slide drives the test box with the lithium-ion battery into the pressure test mechanism area for testing. After the lithium-ion battery test is completed, the operator manually takes the lithium-ion battery out of the test box. However, since the lithium-ion battery has a certain weight, it is more laborious for the operator to manually take the lithium-ion battery, and it affects the detection efficiency of the device for the lithium-ion battery. Summary of the invention

[0004] The purpose of the utility model is to provide a pressure test device for studying the thermal runaway hazard of lithium-ion batteries, so as to solve the problem raised in the above background technology that since lithium-ion batteries have a certain weight, it is relatively laborious for operators to manually pick up lithium-ion batteries, and this affects the detection efficiency of the device for lithium-ion batteries.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure test device for studying the thermal runaway hazard of a lithium-ion battery, comprising a workbench, a pressure test mechanism is installed on one side of the top of the workbench, and a clamping mechanism is arranged on the outer side of the workbench, and the clamping mechanism is used to clamp the lithium-ion battery;

[0006] The clamping mechanism includes a placement frame, a driving assembly, a lifting assembly and a clamping claw assembly;

[0007] The placement rack is fixedly connected to the outer side of the workbench, and the placement rack is used for temporarily placing lithium-ion batteries;

[0008] The driving assembly is used to drive the lifting assembly and the clamping claw assembly to rotate;

[0009] The lifting assembly is used to drive the clamping claw assembly to move up and down;

[0010] The clamping jaw assembly is used for clamping lithium-ion batteries.

[0011] Preferably, a slide rail is installed at the top center of the workbench, a slide table is slidably installed on the top of the slide rail, and a detection box for placing lithium-ion batteries is arranged on the top of the slide table.

[0012] Preferably, the driving assembly includes a fixing seat, a rotating disk and a motor;

[0013] The fixing seat is fixedly connected to the top edge of the workbench, and the fixing seat is a hollow structure. The turntable is rotatably connected to the top of the fixing seat. The motor is installed inside the fixing seat, and the turntable is fixedly connected to the end of the output shaft of the motor.

[0014] Preferably, the lifting assembly comprises a first cylinder and a moving frame;

[0015] The first cylinder is installed on the top of the turntable, and one end of the moving frame is fixedly connected to the end of the output shaft of the first cylinder.

[0016] Preferably, the output shaft of the motor in the running state is used to drive the first cylinder to rotate through the turntable, and the output shaft of the first cylinder in the running state is used to drive the movable frame to move up and down.

[0017] Preferably, the clamping jaw assembly comprises a second cylinder, a bracket, a lifting block, a connecting rod and a clamping jaw;

[0018] The second cylinder is fixedly connected to the top of the other end of the moving frame, the bracket is fixedly connected to the bottom of the other end of the moving frame, and the inner center end of the bracket is provided with a through hole for the output shaft of the second cylinder to pass through, the lifting block is fixedly connected to the end of the output shaft of the second cylinder, one end of the clamp is fixedly connected to the edge of the bracket, one end of the connecting rod is rotatably connected to the lifting block, and the other end of the connecting rod is rotatably connected to the clamp.

[0019] Preferably, the output shaft of the second cylinder in the operating state is used to drive the two connecting rods to move through the lifting block, and the two connecting rods in the moving state are used to drive the clamping jaws to move closer to or away from each other.

[0020] Compared with the prior art, the beneficial effect of the utility model is that the clamping mechanism enables the two clamping jaws in a close state to clamp the lithium-ion battery to be tested placed on the placement rack into the inside of the test box, and the two clamping jaws in a far state release the clamping of the lithium-ion battery, thereby facilitating the clamping of the lithium-ion battery through the mechanical structure, effectively improving the detection efficiency of the device for lithium-ion batteries, and reducing the workload of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0023] Figure 3 This is a structural schematic diagram of the clamping mechanism of the utility model from another perspective;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixing seat of the utility model.

[0025] In the figure: 1. workbench; 2. pressure test mechanism; 3. slide rail; 4. slide table; 5. test box; 6. clamping mechanism; 601. placement rack; 602. fixed seat; 603. turntable; 604. first cylinder; 605. moving rack; 606. second cylinder; 607. bracket; 608. lifting block; 609. connecting rod; 6010. clamping claw; 6011. motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 The utility model provides a technical solution of a pressure test device for studying the thermal runaway hazard of a lithium-ion battery: a pressure test device for studying the thermal runaway hazard of a lithium-ion battery, comprising a workbench 1, a pressure test mechanism 2 is installed on one side of the top of the workbench 1, and a clamping mechanism 6 is arranged on the outer side of the workbench 1, and the clamping mechanism 6 is used to clamp the lithium-ion battery;

[0028] The clamping mechanism 6 includes a placement frame 601, a driving assembly, a lifting assembly and a clamping claw assembly;

[0029] The placement rack 601 is fixedly connected to the outer side of the workbench 1, and the placement rack 601 is used for temporarily placing lithium-ion batteries;

[0030] The driving assembly is used to drive the lifting assembly and the clamping claw assembly to rotate;

[0031] The lifting assembly is used to drive the clamping claw assembly to move up and down;

[0032] The clamping jaw assembly is used to clamp lithium-ion batteries.

[0033] Please refer to Figure 1, a slide rail 3 is installed at the center of the top of the workbench 1, a slide table 4 is slidably installed on the top of the slide rail 3, and a detection box 5 for placing lithium-ion batteries is arranged on the top of the slide table 4.

[0034] In this embodiment: the slide table 4 drives the detection box 5 with the lithium-ion battery placed therein to move along the track of the slide rail 3 towards the direction close to the withstand voltage test mechanism 2, then the withstand voltage test mechanism 2 conducts a withstand voltage test on the lithium-ion battery. When the lithium-ion battery detection is completed, the slide table 4 drives the detection box 5 with the lithium-ion battery placed therein to move along the track of the slide rail 3 towards the direction away from the withstand voltage test mechanism 2.

[0035] Please refer specifically to Figure 4 , the driving assembly includes a fixed seat 602, a turntable 603 and a motor 6011;

[0036] The fixed seat 602 is fixedly connected to the top edge of the workbench 1, and the fixed seat 602 is of a hollow structure. The turntable 603 is rotatably connected to the top of the fixed seat 602. The motor 6011 is installed inside the fixed seat 602, and the turntable 603 is fixedly connected to the end of the output shaft of the motor 6011.

[0037] In this embodiment: by connecting the motor 6011 to power and running it, the output shaft of the running motor 6011 drives the turntable 603 to rotate by 90 degrees. The rotating turntable 603 drives the first cylinder 604 and the clamped lithium-ion battery to rotate by 90 degrees, so that the clamped lithium-ion battery is aligned with the opening of the detection box 5.

[0038] Please refer specifically to Figure 3 , the lifting assembly includes a first cylinder 604 and a moving frame 605;

[0039] The first cylinder 604 is installed on the top of the turntable 603, and one end of the moving frame 605 is fixedly connected to the end of the output shaft of the first cylinder 604.

[0040] In this embodiment: by connecting the first cylinder 604 to power and running it, the output shaft of the running first cylinder 604 drives the moving frame 605 to move upward. Then the upward moving moving frame 605 drives the clamped lithium-ion battery to move upward.

[0041] Please refer specifically to Figure 3 , the output shaft of the running motor 6011 is used to drive the first cylinder 604 to rotate through the turntable 603, and the output shaft of the running first cylinder 604 is used to drive the moving frame 605 to move up and down.

[0042] In this embodiment: the output shaft of the motor 6011 in the running state drives the turntable 603 to rotate ninety degrees, the turntable 603 in the rotating state drives the first cylinder 604 and the clamped lithium-ion battery to rotate ninety degrees, and the output shaft of the first cylinder 604 in the running state drives the movable frame 605 to move upward.

[0043] Please refer to Figure 3 , the clamping jaw assembly includes a second cylinder 606, a bracket 607, a lifting block 608, a connecting rod 609 and a clamping jaw 6010;

[0044] The second cylinder 606 is fixedly connected to the top of the other end of the moving frame 605, the bracket 607 is fixedly connected to the bottom of the other end of the moving frame 605, and the inner center end of the bracket 607 is provided with a through hole for the output shaft of the second cylinder 606 to pass through, the lifting block 608 is fixedly connected to the end of the output shaft of the second cylinder 606, one end of the clamp 6010 is fixedly connected to the edge of the bracket 607, one end of the connecting rod 609 is rotatably connected to the lifting block 608, and the other end of the connecting rod 609 is rotatably connected to the clamp 6010.

[0045] In this embodiment: by connecting the second cylinder 606 to electricity and running it, the output shaft of the second cylinder 606 in the running state drives the lifting block 608 to move upward, and since one end of the connecting rod 609 is rotatably connected to the lifting block 608, the lifting block 608 in the rising state drives the two connecting rods 609 to retract, and since the other end of the connecting rod 609 is rotatably connected to the clamping jaws 6010, the two connecting rods 609 in the retracted state respectively drive the two clamping jaws 6010 to move closer to each other, and the two clamping jaws 6010 in the close state clamp the lithium-ion battery placed on the placement rack 601.

[0046] Please refer to Figure 3 The output shaft of the second cylinder 606 in the running state is used to drive the two connecting rods 609 to move through the lifting block 608, and the two connecting rods 609 in the moving state are used to drive the clamping claws 6010 to move closer or farther away.

[0047] In this embodiment: the output shaft of the second cylinder 606 in the running state drives the lifting block 608 to move downward, and the lifting block 608 in the descending state drives the two clamping jaws 6010 to move away from each other through two connecting rods 609, so that the two clamping jaws 6010 in the away state release the clamping of the lithium-ion battery.

[0048] Working principle: when it is necessary to conduct a withstand voltage test on the lithium-ion battery, first place the lithium-ion battery on the placement rack 601. At this time, the motor 6011, the first cylinder 604 and the second cylinder 606 are powered on and operated, so that the output shaft of the second cylinder 606 in the operating state drives the lifting block 608 to move upward. Since one end of the connecting rod 609 is rotatably connected to the lifting block 608, the lifting block 608 in the rising state drives the two connecting rods 609 to retract. Since the other end of the connecting rod 609 is rotatably connected to the clamping claw 6010, the two connecting rods 609 in the retracted state respectively drive the two clamping claws 6010 to move closer to each other, and the two clamping claws 6010 in the close state clamp the lithium-ion battery placed on the placement rack 601. At this time, the output shaft of the first cylinder 604 in the operating state drives the moving rack 605 to move upward. The moving rack 605 in the rising state drives The lithium-ion battery in the clamped state is moved upward, and the output shaft of the motor 6011 in the running state drives the turntable 603 to rotate ninety degrees, and the turntable 603 in the rotating state drives the first cylinder 604 and the lithium-ion battery in the clamped state to rotate ninety degrees, so that the lithium-ion battery in the clamped state is aligned with the opening of the detection box 5, and the output shaft of the first cylinder 604 in the running state drives the lithium-ion battery in the clamped state to move downward through the moving frame 605, and the ion battery is placed inside the detection box 5. At this time, the output shaft of the second cylinder 606 in the running state drives the lifting block 608 to move downward, and the lifting block 608 in the descending state drives the two clamping claws 6010 to move away from each other through the two connecting rods 609, and the two clamping claws 6010 in the away state release the clamping of the lithium-ion battery, so that the lithium-ion battery is completely placed inside the detection box 5;

[0049] At this time, the slide 4 drives the detection box 5 containing the lithium-ion battery to move along the track of the slide rail 3 toward the direction close to the pressure test mechanism 2, and the pressure test mechanism 2 then performs a pressure test on the lithium-ion battery. When the lithium-ion battery test is completed, the slide 4 drives the detection box 5 containing the lithium-ion battery to move along the track of the slide rail 3 toward the direction away from the pressure test mechanism 2. As mentioned above, the clamping mechanism 6 will clamp the lithium-ion battery that has been tested inside the detection box 5, and then test the next lithium-ion battery.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure test device for studying the thermal runaway hazard of a lithium-ion battery, comprising a workbench (1), a pressure test mechanism (2) being installed on one side of the top of the workbench (1), characterized in that: A clamping mechanism (6) is provided on the outer side of the workbench (1), and the clamping mechanism (6) is used to clamp the lithium-ion battery; The clamping mechanism (6) comprises a placement frame (601), a driving component, a lifting component and a clamping claw component; The placement rack (601) is fixedly connected to the outside of the workbench (1), and the placement rack (601) is used for temporarily placing lithium-ion batteries; The driving assembly is used to drive the lifting assembly and the clamping claw assembly to rotate; The lifting assembly is used to drive the clamping claw assembly to move up and down; The clamping jaw assembly is used for clamping lithium-ion batteries.

2. A pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 1, characterized in that: A slide rail (3) is installed at the top center of the workbench (1), a slide table (4) is slidably installed on the top of the slide rail (3), and a detection box (5) for placing lithium-ion batteries is arranged on the top of the slide table (4).

3. The pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 1, characterized in that: The driving assembly comprises a fixed seat (602), a rotating disk (603) and a motor (6011); The fixed seat (602) is fixedly connected to the top edge of the workbench (1), and the fixed seat (602) is a hollow structure. The turntable (603) is rotatably connected to the top of the fixed seat (602). The motor (6011) is installed inside the fixed seat (602), and the turntable (603) is fixedly connected to the end of the output shaft of the motor (6011).

4. The pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 3, characterized in that: The lifting assembly comprises a first cylinder (604) and a moving frame (605); The first cylinder (604) is installed on the top of the turntable (603), and one end of the moving frame (605) is fixedly connected to the end of the output shaft of the first cylinder (604).

5. A pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 4, characterized in that: The output shaft of the motor (6011) in the running state is used to drive the first cylinder (604) to rotate via the turntable (603), and the output shaft of the first cylinder (604) in the running state is used to drive the moving frame (605) to move up and down.

6. A pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 4, characterized in that: The clamping claw assembly comprises a second cylinder (606), a bracket (607), a lifting block (608), a connecting rod (609) and a clamping claw (6010); The second cylinder (606) is fixedly connected to the top of the other end of the movable frame (605), the bracket (607) is fixedly connected to the bottom of the other end of the movable frame (605), and the inner center end of the bracket (607) is provided with a through hole for the output shaft of the second cylinder (606) to pass through, the lifting block (608) is fixedly connected to the end of the output shaft of the second cylinder (606), one end of the clamping claw (6010) is fixedly connected to the edge of the bracket (607), one end of the connecting rod (609) is rotatably connected to the lifting block (608), and the other end of the connecting rod (609) is rotatably connected to the clamping claw (6010).

7. A pressure test device for studying the thermal runaway hazard of a lithium-ion battery according to claim 6, characterized in that: The output shaft of the second cylinder (606) in the operating state is used to drive the two connecting rods (609) to move through the lifting block (608), and the two connecting rods (609) in the moving state are used to drive the clamping claws (6010) to move towards or away from each other.

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