Tension testing device for lithium battery component

Abstract

The utility model discloses a tension testing device for a lithium battery component. The tension testing device comprises a constant-temperature box; the electrolyte tank is arranged in the constant-temperature box, sliding rails are symmetrically fixed on the inner wall of the electrolyte tank, sliding blocks are mounted on the sliding rails, and the sliding blocks are in threaded connection with the adjusting screw rods; and the clamp is arranged in the electrolyte tank and consists of a connecting plate, an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are fixed at two ends of the connecting plate, the connecting plate is fixed on the adjusting screw rod, and the upper clamping plate is in threaded connection with the adjusting bolt. The tensile force testing device for the lithium battery component can simulate an actual use environment, so that a measured result is closer to a real value in a use scene.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, in particular to a tension testing device for lithium battery components. Background Art

[0002] There are many parts in lithium battery that need to be tested for tensile strength, such as diaphragms, copper-aluminum foil current collectors, tapes, film adhesives, plates, etc. Currently, they are directly tested under external conditions. However, during actual use, the tensile strength of these internal parts of lithium batteries will be affected by temperature and electrolyte swelling, which will deteriorate their tensile strength. Therefore, the tensile strength directly measured under external conditions is significantly different from the tensile strength during actual use, and the degree of influence is unpredictable, and the cross-influence is even more complicated. How to test its actual tensile strength and reduce the impact of external factors on battery component testing has become one of the problems that need to be solved urgently. Utility Model Content

[0003] The purpose of the utility model is to provide a tensile testing device for lithium battery components, which can simulate the actual use environment and make the measured results closer to the real value in its use scenario.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A tensile testing device for lithium battery components, comprising:

[0006] Constant temperature box;

[0007] An electrolyte tank is arranged in a constant temperature box, wherein a slide rail is symmetrically fixed on the inner wall of the electrolyte tank, a slider is installed on the slide rail, and the slider is connected to the adjusting screw by a thread;

[0008] A clamp is arranged in an electrolyte tank, and the clamp consists of a connecting plate and an upper clamping plate and a lower clamping plate fixed at both ends of the connecting plate. The connecting plate is fixed on an adjusting screw, and the upper clamping plate is connected to the adjusting bolt through threads.

[0009] Preferably, a humidity sensor and a temperature sensor are installed in the constant temperature box.

[0010] Preferably, a support rod is fixed to the bottom of the thermostat, a support plate is fixed to the upper end of the support rod, a groove is provided at the lower end of the bottom plate of the electrolyte tank for the support plate to pass through, and a slot is provided on one side of the groove for engaging with the support plate.

[0011] Preferably, guide rods are symmetrically fixed in the constant temperature box and on both sides of the electrolyte tank, guide blocks are respectively fixed to the side walls at both ends of the electrolyte tank, the guide blocks are sleeved outside the guide rods, and the guide blocks are provided with perforation one and perforation two, and the perforation one and perforation two are connected.

[0012] Preferably, an elastic stopper is fixed between the first through hole and the second through hole.

[0013] Preferably, a cover plate is hinged on the upper end of the thermostatic box.

[0014] Preferably, an opening and closing plate is hingedly connected on the cover plate and located above the electrolyte tank.

[0015] Preferably, a liquid outlet pipe is provided at the lower end of the electrolyte tank, and the liquid outlet pipe extends out of the thermostatic box.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1) The utility model can test the tensile strength under different temperatures and humidity by setting a constant temperature box;

[0018] 2) An electrolyte tank is set up to keep the sample moist and test it immediately after swelling, thus improving the accuracy of the test results;

[0019] 3) The test device has a wide range of applications and can be used to study the tension of battery components under different environmental conditions, which is beneficial to the development of batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a tensile testing device for lithium battery components in an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the support plate and the bottom plate of the electrolyte tank in the embodiment of the utility model;

[0022] Figure 3 It is a top view of the guide block and the guide rod in the embodiment of the utility model;

[0023] In the figure, 1, constant temperature box, 2, electrolyte tank, 3, humidity sensor, 4, temperature sensor, 5, cover plate, 6, opening and closing plate, 7, support rod, 8, support plate, 9, groove, 10, slot, 11, guide rod, 12, guide block, 13, perforation one, 14, perforation two, 15, elastic stopper, 16, slide rail, 17, slider, 18, adjusting screw, 19, connecting plate, 20, upper splint, 21, lower splint, 22, adjusting bolt, 23, liquid outlet pipe, 24, bottom plate, 25, lithium battery components. DETAILED DESCRIPTION

[0024] 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 of 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.

[0025] See also Figure 1 As shown, a tensile testing device for lithium battery components includes a thermostat 1, an electrolyte tank 2, a fixture, and a tensile testing machine. The tensile testing machine uses an existing tensile testing machine. A humidity sensor 3 and a temperature sensor 4 are installed in the thermostat 1. The thermostat 1 is provided with a controller. The controller has the humidity sensor 3, the temperature sensor 4, and a temperature control mechanism and a humidity adjustment mechanism that are electrically connected. The thermostat 1 is a prior art, and its structure is not described here. A cover plate 5 is hinged at the upper end of the thermostat 1. An opening and closing plate 6 is hinged on the cover plate 5 and located above the electrolyte tank 2. By opening the opening and closing plate 6, it is convenient to perform tensile testing on battery components.

[0026] like Figure 2 As shown, a support rod 7 is fixed at the bottom in the thermostat 1, and a support plate 8 is fixed at the upper end of the support rod 7. The electrolyte tank 2 is arranged in the thermostat 1, and a groove 9 for the support plate 8 to pass through is provided at the lower end of the bottom plate 24 of the electrolyte tank 2. A card slot 10 engaged with the support plate 8 is provided on one side of the groove 9. The groove 9 is connected to the card slot 10. The length and width of the groove 9 are greater than the length and width of the support plate 8, and the card slot 10 is adapted to the size of the support plate 8. Guide rods 11 are symmetrically fixed in the thermostat 1 and located on both sides of the electrolyte tank 2. The guide rods 11 are specifically fixed to the bottom of the thermostat 1. Guide blocks 12 are respectively fixed to the side walls at both ends of the electrolyte tank 2, and the guide blocks 12 are sleeved outside the guide rods 11, as shown in FIG. Figure 3 As shown, the guide block 12 is provided with a through hole 13 and a through hole 14 , the through hole 13 and the through hole 14 are connected, and an elastic stopper 15 is fixed between the through hole 13 and the through hole 14 , and the elastic stopper 15 can be made of rubber.

[0027] like Figure 1As shown, a slide rail 16 is symmetrically fixed on the inner wall of the electrolyte tank 2, and a slider 17 is installed on the slide rail 16. The slider 17 is fixed to the slide rail 16 by bolts, and the slider 17 is connected to the adjusting screw 18 by threads. The clamp is symmetrically arranged in the electrolyte tank 2, and the clamp is composed of a connecting plate 19 and an upper clamping plate 20 and a lower clamping plate 21 fixed at both ends of the connecting plate 19. The connecting plate 19 is fixed to the end of the adjusting screw 18 away from the slider 17. The upper clamping plate 20 is connected to the adjusting bolt 22 by threads, that is, the adjusting bolt 22 passes through the upper clamping plate 20 and extends between the upper clamping plate 20 and the lower clamping plate 21. A liquid outlet pipe 23 is provided at the lower end of the electrolyte tank 2, and the liquid outlet pipe 23 extends out of the thermostat 1. A fixed pipe for fixing the liquid outlet pipe 23 can be provided at the bottom of the thermostat 1. The liquid outlet pipe 23 can be a hose, and a valve is provided on the liquid outlet pipe 23. The electrolyte in the electrolyte tank 2 can be discharged through the liquid outlet pipe 23.

[0028] Working principle: first assemble the electrolyte tank 2, open the cover plate 5, extend the liquid outlet pipe 23 from the bottom of the thermostat 1, and then sleeve the guide rod 11 into the perforation 13 of the guide block 12, so that the groove 9 here is opposite to the support plate 8, that is, the electrolyte tank 2 is moved downward along the perforation 13, and the support plate 8 is just located in the groove 9. When the support plate 8 contacts the bottom plate 24 of the electrolyte tank 2, the electrolyte tank 2 is moved horizontally, so that the support plate 8 extends into the card slot 10 for engagement, and the guide rod 11 squeezes the elastic block 15 and moves it into the perforation 2 14. When the electrolyte tank 2 needs to be disassembled, the reverse operation can be performed.

[0029] When the tensile force of the lithium battery component 25 needs to be tested, the slider 17 is moved, and after the slider 17 is adjusted to a suitable height, the slider 17 is fixed to the slide rail 16 with a bolt; then the adjusting screw 18 is turned to adjust the spacing between the two clamps to a suitable distance, and then the lithium battery component 25 is placed between the two clamps, so that the lithium battery component 25 is located between the upper clamp 20 and the lower clamp 21, and fits with the upper end surface of the lower clamp 21, and the adjusting bolt 22 is turned to make the adjusting bolt 22 press against the lithium battery component 25. A rope is put on the outer sleeve of the lithium battery component 25 (this step can also be completed before clamping the lithium battery component 25) or other fixings compatible with the tensile testing machine, and the fixings are connected to the tensile testing machine. Then the temperature and humidity of the thermostat 1 are adjusted to the required values, and the electrolyte is injected into the electrolyte tank 2. After the battery swells, it is immediately tested using the tensile testing machine.

[0030] The above contents are merely examples and explanations of the structure of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A tensile testing device for lithium battery components, characterized in that: include: Constant temperature box; An electrolyte tank is arranged in a constant temperature box, wherein a slide rail is symmetrically fixed on the inner wall of the electrolyte tank, a slider is installed on the slide rail, and the slider is connected to the adjusting screw by a thread; A clamp is arranged in an electrolyte tank, and the clamp consists of a connecting plate and an upper clamping plate and a lower clamping plate fixed at both ends of the connecting plate. The connecting plate is fixed on an adjusting screw, and the upper clamping plate is connected to the adjusting bolt through threads.

2. A tensile testing device for lithium battery components according to claim 1, characterized in that: A humidity sensor and a temperature sensor are installed in the constant temperature box.

3. A tensile testing device for lithium battery components according to claim 1, characterized in that: A support rod is fixed at the bottom of the thermostat, a support plate is fixed at the upper end of the support rod, a groove is provided at the lower end of the bottom plate of the electrolyte tank for the support plate to pass through, and a slot is provided on one side of the groove for engaging with the support plate.

4. A tensile testing device for lithium battery components according to claim 3, characterized in that: Guide rods are symmetrically fixed in the constant temperature box and located on both sides of the electrolyte tank. Guide blocks are respectively fixed to the side walls at both ends of the electrolyte tank. The guide blocks are sleeved outside the guide rods. The guide blocks are provided with perforation one and perforation two, and the perforation one and perforation two are connected.

5. A tensile testing device for lithium battery components according to claim 4, characterized in that: An elastic stopper is fixed between the first through hole and the second through hole.

6. A tensile testing device for lithium battery components according to claim 1, characterized in that: A cover plate is hinged on the upper end of the thermostatic box.

7. A tensile testing device for lithium battery components according to claim 6, characterized in that: An opening and closing plate is hingedly connected on the cover plate and located above the electrolyte tank.

8. A tensile testing device for lithium battery components according to claim 1, characterized in that: A liquid outlet pipe is arranged at the lower end of the electrolyte tank, and the liquid outlet pipe extends out of the thermostatic box.

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