A lithium battery multi-environment endurance detection device

Abstract

The present invention provides a multi-environment endurance detection device for lithium batteries in the technical field of lithium battery technology. By placing the detection clamping box into a sealed vibration test chamber, the heat dissipated by the lithium battery in a closed environment is concentrated, simulating the environment of the lithium battery generating electricity and generating heat. The dissipated heat heats the expansion oil in the expansion oil tank, causing the ejecting piston to push the lifting piece to move downward, thereby driving the compression sleeve to press the diversion valve on the diversion port downward to deform. The cold air that originally flowed inside the cold air pipe enters the vibration test chamber from the leaked diversion port, realizing the air-cooled heat dissipation of the lithium battery. The above changes are repeated to achieve the fluctuating change form of the temperature inside the vibration test chamber, improving the authenticity of simulating the power consumption of the lithium battery and effectively improving the accuracy of experimental data. The adjusting screw column can adjust the height of the compression sleeve, facilitating the adjustment of the heat dissipation threshold of the cold air pipe and adapting to experiments in different temperature environments.

Description

Technical Field

[0001] This application relates to the technical field of lithium batteries, and particularly to a lithium battery multi-environment endurance detection device. Background Art

[0002] A lithium battery is a secondary battery that relies on the movement of lithium ions between the positive and negative electrodes to achieve charge and discharge, and has a wide range of applications in the field of power batteries. The quality of lithium batteries affects the use experience of power equipment such as electric vehicles and electric cars. During the production of lithium batteries, in order to prevent unqualified batteries from flowing into the market for use, corresponding tests are usually carried out on lithium batteries to test their endurance.

[0003] Among all environmental factors, temperature has the greatest impact on the charge and discharge performance of the battery. The electrochemical reaction at the electrode / electrolyte interface is related to the ambient temperature. As the temperature rises, the output power of the lithium-ion battery will increase. The capacity decay of the lithium-ion battery is affected by battery polarization, that is, the diffusion speed of lithium ions cannot keep up with the transfer speed of electrons, resulting in fewer lithium ions accommodated in the positive electrode of the battery. Existing endurance detection equipment needs to be externally connected to a heating device to conduct battery endurance tests in a high-temperature environment. However, the heat source received by the lithium battery is generally the heat generated by the discharge of the lithium battery itself. The transfer directions of the two kinds of heat are different, so the impacts on the lithium battery are also different and cannot be used as the basis for lithium battery endurance tests. At the same time, most of the existing detection equipment can only conduct constant-temperature environment tests on lithium batteries. However, the ambient temperature during the use of lithium batteries is not constant. Therefore, this detection method cannot simulate the temperature change during the use of lithium batteries, thus affecting the authenticity of the detection data of lithium batteries.

[0004] In response to the above problems, this application makes corresponding technical conjectures. The lithium battery is placed in a sealed environment for endurance testing. The heat generated by the discharge of the lithium battery is concentrated in the sealed environment, simulating the normal use of the lithium battery. The temperature of the lithium battery in the sealed state will continue to rise. After reaching the preset temperature threshold, the seal is released for heat dissipation, so that the lithium battery is in an environment with dynamic temperature, improving the simulation authenticity of the lithium battery test. Summary of the Invention

[0005] The purpose of this application is to provide a dynamically changing temperature environment for the endurance test of lithium batteries. Compared with the prior art, a multi-environment endurance detection device for lithium batteries is provided. Cold air ducts are connected through the four corners on the side of the vibration test chamber, and diversion ports are provided on the surface of the cold air ducts. On one side inside the diversion port, a diversion valve is fixedly connected. On both outer sides of the detection placement clip box, lifting pieces are movably connected. At the top and bottom of the lifting pieces, an upper bracket and a lower bracket are respectively fixedly connected. Compression sleeves are sleeved inside the upper bracket and the lower bracket, and a connecting rod is fixedly connected between the two compression sleeves. The end surface of the diversion valve is fixedly connected with a positioning column sleeved with the compression sleeve. The top of the upper bracket is threadedly connected with an adjusting threaded column, and the adjusting threaded column is movably connected with the top end of the compression sleeve;

[0006] On both sides of the detection placement clip box, expansion oil storage tanks are inlaid. The side surface of the expansion oil storage tank protrudes outward and is sleeved with the lifting piece. A top piston is movably connected to the bottom of the expansion oil storage tank, and the bottom end of the top piston is fixedly connected with the bottom of the lifting piece. A return spring is fixedly connected between the top of the expansion oil storage tank and the top of the lifting piece.

[0007] It is realized by loading the lithium battery into the detection placement clip box, and then putting the detection placement clip box into the sealed vibration test chamber. The heat dissipated by the lithium battery in the closed environment is concentrated, simulating the environment of the lithium battery generating electricity and heat. The heat dissipated heats the expansion oil in the expansion oil storage tank, so that the top piston extends outward, pushing the lifting piece to move downward, thereby driving the compression sleeve to press the diversion valve on the diversion port downward to deform. The cold air originally flowing inside the cold air duct enters the vibration test chamber from the leaked diversion port, realizing the air-cooled heat dissipation of the lithium battery. The above changes are repeated to realize the fluctuating change form of the temperature inside the vibration test chamber, improving the authenticity of simulating the power consumption of the lithium battery and effectively improving the accuracy of the experimental data. The adjusting threaded column can adjust the height of the compression sleeve, facilitating the adjustment of the heat dissipation threshold of the cold air duct to adapt to experiments in different temperature environments.

[0008] Furthermore, heat insulation layers are coated on the inner surfaces of the four cold air ducts, and one end of the four cold air ducts is commonly connected to a heat dissipation fan. The heat insulation layer inside the cold air duct prevents heat from directly passing through the cold air duct and being discharged. The heat dissipation fan drives the outside cold air into the cold air duct to provide an air-cooled heat dissipation effect for the cold air duct.

[0009] Furthermore, the diversion valve is semicircularly arranged and flush with the inner wall of the cold air duct, and the diversion valve is made of an elastic high-temperature resistant material. The diversion valve shields and fits the diversion port on the cold air duct, without affecting the flow of air inside the cold air duct. The diversion valve made of the elastic high-temperature resistant material can be restored in time after deformation, and at the same time, the high temperature is prevented from affecting the service life of the diversion valve.

[0010] Further, both outer sides of the detection placement cassette are fixedly connected with support pages, and grooves for clamping the cold air duct are formed on the surfaces of the support pages. When the detection placement cassette is placed into the vibration test chamber, the grooves on the support pages clamp the cold air duct, facilitating the assembly of the detection placement cassette.

[0011] Further, a lithium battery mesh bag is placed inside the detection placement cassette, and the lithium battery mesh bag is made of metal wires. The lithium batteries to be placed inside the detection placement cassette are wrapped by the lithium battery mesh bag, facilitating the replacement of the lithium batteries through the lithium battery mesh bag.

[0012] Further, the inner surface of the expansion oil tank corresponds to the lithium battery mesh bag, and the inner surface of the expansion oil tank is made of wear-resistant metal material, facilitating the heat transfer between the expansion oil tank and the lithium battery mesh bag, improving the expansion accuracy of the expansion oil inside the expansion oil tank. The inner surface of the expansion oil tank made of wear-resistant metal material has a good anti-wear effect, extending the service life of the equipment.

[0013] Optionally, two parallel tension wires are movably connected to the middle of the lithium battery mesh bag, and test balls are sleeved outside the tension wires. The two groups of test balls are symmetrically arranged with respect to the horizontal midline of the lithium battery mesh bag. When the lithium batteries inside the lithium battery mesh bag bulge, the middle part of the lithium batteries bulges and pushes the test balls on the two tension wires away, increasing the distance between the two tension wires and realizing the pulling of both ends of the tension wires.

[0014] Further, detection tubes are fixedly connected to both ends of the lithium battery mesh bag, and lifting plugs are movably connected inside the detection tubes. Both ends of the two tension wires respectively penetrate the detection tubes and are fixedly connected to the bottom ends of the lifting plugs. A top-out spring is fixedly connected to the bottom of the lifting plug. The lithium battery mesh bag is unfolded by using the detection tubes, and the top-out spring pushes the lifting plug upward. When the tension wires are stressed, a downward pulling force is exerted on the lifting plug.

[0015] Further, a prompt liquid bag is fixedly connected to the top end of the detection tube, and the bottom end of the prompt liquid bag is fixedly connected to the top end of the lifting plug. The top end of the detection tube penetrates the sealing cover. When the lifting plug is lifted and presses the prompt liquid bag, the prompt liquid bag is squeezed flat. When the lifting plug descends, the prompt liquid bag resumes its original state, realizing the prompt effect through the change of the prompt liquid bag.

[0016] Further, the prompt liquid bag is made of transparent plastic, and a pigment solution is filled inside the prompt liquid bag. The color of the lifting plug is different from the color of the pigment solution filled inside the prompt liquid bag. In the squeezed state of the prompt liquid bag, the pigment solution inside the prompt liquid bag becomes thin, so that the lifting plug can be directly observed through the transparent prompt liquid bag. On the contrary, when there is sufficient pigment solution inside the prompt liquid bag, the lifting plug cannot be observed, and whether the lithium battery bulges is reflected through different situations.

[0017] Compared with the prior art, the advantages of this application are as follows:

[0018] (1) In this application, the lithium battery is placed in the detection placement clip box, and then the detection placement clip box is placed in the sealed vibration test chamber. The heat dissipated by the lithium battery in the closed environment is concentrated, simulating the environment of the lithium battery generating electricity and heat. The dissipated heat heats the expansion oil in the expansion oil tank, causing the ejection piston to extend outwards, pushing the lifting piece to move downward, thereby driving the compression sleeve to compress and deform the diversion valve on the diversion port downward. The cold air originally flowing inside the cold air pipe enters the vibration test chamber from the leaked diversion port, realizing the air-cooled heat dissipation of the lithium battery. The above changes are repeated to achieve the fluctuating change form of the temperature inside the vibration test chamber, improving the authenticity of simulating the power consumption of the lithium battery and effectively improving the accuracy of experimental data. The adjusting screw column can adjust the height of the compression sleeve, facilitating the adjustment of the heat dissipation threshold of the cold air pipe to adapt to experiments in different temperature environments.

[0019] (2) The inner surfaces of the four cold air pipes are all coated with heat insulation layers, and one end of the four cold air pipes is commonly connected to a heat dissipation fan. The heat insulation layer inside the cold air pipe prevents heat from directly passing through the cold air pipe and being discharged. The heat dissipation fan drives the outside cold air into the cold air pipe, providing an air-cooled heat dissipation effect for the cold air pipe.

[0020] (3) The diversion valve is semicircularly arranged and flush with the inner wall of the cold air pipe, and the diversion valve is made of an elastic high-temperature resistant material. The diversion valve shields and fits the diversion port on the cold air pipe, without affecting the flow of air inside the cold air pipe. The diversion valve made of the elastic high-temperature resistant material can be restored in time after deformation, and at the same time, it avoids the high temperature affecting the service life of the diversion valve.

[0021] (4) Both sides of the detection placement clip box are fixedly connected with support pages, and grooves for clamping the cold air pipe are provided on the surface of the support pages. When the detection placement clip box is placed in the vibration test chamber, the grooves on the support pages clamp the cold air pipe, facilitating the assembly of the detection placement clip box.

[0022] (5) A lithium battery mesh bag is placed inside the detection placement clip box, and the lithium battery mesh bag is made of metal wires. The lithium battery to be placed in the detection placement clip box is wrapped by the lithium battery mesh bag, facilitating the replacement of the lithium battery through the lithium battery mesh bag.

[0023] (6) The inner surface of the expansion oil tank corresponds to the lithium battery mesh bag, and the inner surface of the expansion oil tank is made of wear-resistant metal material, facilitating the heat transfer between the expansion oil tank and the lithium battery mesh bag, improving the expansion accuracy of the expansion oil inside the expansion oil tank. The inner surface of the expansion oil tank made of wear-resistant metal material has good anti-wear effect, improving the service life of the equipment.

[0024] (7) Two parallel tension wires are movably connected to the middle of the lithium battery mesh bag, and test balls are sleeved outside the tension wires. The two groups of test balls are symmetrically arranged with respect to the horizontal midline of the lithium battery mesh bag. When the lithium battery in the lithium battery mesh bag bulges, the middle of the lithium battery bulges and pushes the test balls on the two tension wires away, increasing the distance between the two tension wires and realizing the pulling of both ends of the tension wires.

[0025] (8) Detection tubes are fixedly connected to both ends of the lithium battery mesh bag, and a lifting plug is movably connected inside the detection tubes. Both ends of the two tension wires respectively penetrate the detection tubes and are fixed to the bottom end of the lifting plug. A top spring is fixedly connected to the bottom of the lifting plug. The lithium battery mesh bag is unfolded by using the detection tubes, and the top spring pushes the lifting plug upward. When the tension wires are stressed, a downward pulling force is applied to the lifting plug.

[0026] (9) A prompt liquid bag is fixedly connected to the top end of the detection tube, and the bottom end of the prompt liquid bag is fixedly connected to the top end of the lifting plug. The top end of the detection tube penetrates the sealing cover. When the lifting plug is pushed up to compress the prompt liquid bag, the prompt liquid bag is squeezed flat. When the lifting plug descends, the prompt liquid bag resumes its original state, and the prompt effect is achieved through the change of the prompt liquid bag.

[0027] (10) The prompt liquid bag is made of transparent plastic, and a pigment solution is filled inside the prompt liquid bag. The color of the lifting plug is different from the color of the pigment solution filled in the prompt liquid bag. In the flattened state of the prompt liquid bag, the pigment solution inside the prompt liquid bag becomes thin, so that the lifting plug can be directly observed through the transparent prompt liquid bag. On the contrary, when there is sufficient pigment solution in the prompt liquid bag, the lifting plug cannot be observed, and whether the lithium battery bulges is reflected through different situations. Description of the Drawings

[0028] Figure 1 is a pictorial diagram of the lifting and lowering movement adjustment of the lifting piece of the present application to change the guiding valve;

[0029] Figure 2 is a three-dimensional structure diagram of the present application;

[0030] Figure 3 is a side sectional view of the present application;

[0031] Figure 4 is a front sectional view of the present application;

[0032] Figure 5 is a three-dimensional structure diagram of the detection placement clip box of the present application;

[0033] Figure 6 is a three-dimensional structure diagram of the cold air duct of the present application;

[0034] Figure 7 is a pictorial diagram of the change of the downward movement of the lifting piece of the present application;

[0035] Figure 8 It is a pictogram of the downward movement change of the lifting piece when the adjusting screw column of this application is rotated to the highest position;

[0036] Figure 9 It is a pictogram of the downward movement change of the lifting piece when the adjusting screw column of this application is rotated to the lowest position;

[0037] Figure 10 It is a pictogram of the deformation of the diverted valve under the lowest compression of the adjusting screw column of this application;

[0038] Figure 11 It is a three-dimensional structure diagram of the lithium battery mesh bag of this application;

[0039] Figure 12 It is a side sectional view of the lithium battery mesh bag of this application;

[0040] Figure 13 It is a pictogram of the change of the lifting plug extruding the prompt liquid sac of this application.

[0041] Explanation of the reference numerals in the figure:

[0042] 1 Device body, 2 Vibration test chamber body, 3 Detection placement clip box, 4 Sealing cover, 5 Cold air duct, 501 Diverting port, 502 Diverted valve, 503 Positioning column, 6 Lifting piece, 601 Upper bracket, 602 Lower bracket, 603 Compression sleeve, 604 Connecting rod, 605 Adjusting screw column, 7 Expansion oil tank, 701 Ejecting piston, 702 Return spring, 8 Cooling fan, 9 Bracket page, 10 Lithium battery mesh bag, 1001 Tensile wire, 1002 Test ball, 1003 Detection tube, 1004 Lifting plug, 1005 Ejecting spring, 1006 Prompt liquid sac. Specific implementation manners

[0043] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0044] Embodiment 1:

[0045] The present invention provides a lithium battery multi-environment endurance detection device. Please refer to Figure 2-4, including the device body 1, and a vibration test chamber 2 is movably connected inside the device body 1. The vibration test chamber 2 provides vibration conditions for the side view of the lithium battery. A detection placement clip box 3 and a closing cover 4 are detachably sleeved inside and on the top of the vibration test chamber 2 respectively. The test lithium battery is placed in the detection placement clip box 3, and the closing cover 4 closes the vibration test chamber 2, so that the heat generated by the discharge of the lithium battery is concentrated, and the heat dissipated by the lithium battery itself provides a high-temperature environment for the lithium battery, which is more in line with the heat absorption principle of the lithium battery, provides more accurate experimental data, and at the same time does not require an external heating device, so the experiment is more energy-saving. Both external sides of the detection placement clip box 3 are fixedly connected with support pages 9. When the detection placement clip box 3 is placed into the vibration test chamber 2, the grooves on the support pages 9 clamp the cold air duct 5. The detection placement clip box 3 is convenient to assemble and is convenient for the cleaning and maintenance of the detection device.

[0046] Please refer to Figure 1-6 , cold air ducts 5 penetrate and are connected to the four corners on the side of the vibration test chamber 2, and diversion openings 501 are provided on the surface of the cold air ducts 5. A diversion valve 502 is fixedly connected to one side inside the diversion opening 501. The diversion valve 502 shields and aligns the diversion openings 501 on the cold air ducts 5, without affecting the flow of air inside the cold air ducts 5. The diversion valve 502 made of elastic high-temperature resistant material can be restored in time after deformation, and at the same time, the high temperature is avoided from affecting the service life of the diversion valve 502. One ends of the four cold air ducts 5 are commonly connected to a heat dissipation fan 8. The heat dissipation fan 8 drives the outside cold air into the cold air ducts 5 to provide an air-cooled heat dissipation effect for the cold air ducts 5. When the diversion valve 502 is pressed and deformed, the diversion opening 501 is opened, and the cold air originally flowing in the cold air duct 5 can enter the vibration test chamber 2 through the diversion opening 501. The cold air conducts air-cooled heat dissipation on the vibration test chamber 2, and then the cold air returns to the cold air duct 5 from the diversion opening 501 on the other side, effectively reducing the internal test temperature of the vibration test chamber 2. The diversion valve 502 deforms repeatedly, so as to realize the fluctuating change form of the internal temperature of the vibration test chamber 2;

[0047] Please refer to Figure 1 and 7, on both outer sides of the detection placement cassette 3, lifting pieces 6 are movably connected. On both sides of the detection placement cassette 3, expansion oil reservoirs 7 are inlaid. The side surface of the expansion oil reservoir 7 protrudes outward and is sleeved with the lifting piece 6, which is convenient for guiding the lifting piece 6 to move in the up and down directions. The bottom of the expansion oil reservoir 7 is movably connected with an ejection piston 701, and the bottom end of the ejection piston 701 is fixedly connected to the bottom of the lifting piece 6. The heat dissipated heats the expansion oil in the expansion oil reservoir 7, so that the ejection piston 701 extends outward, pushing the lifting piece 6 to move downward. A return spring 702 is fixedly connected between the top of the expansion oil reservoir 7 and the top of the lifting piece 6. The top and bottom of the lifting piece 6 are respectively fixedly connected with an upper bracket 601 and a lower bracket 602. Compression sleeves 603 are sleeved inside the upper bracket 601 and the lower bracket 602. The movement direction of the compression sleeve 603 is limited by the sleeved method. A connecting rod 604 is fixedly connected between the two compression sleeves 603. The connecting rod 604 realizes the synchronous movement of the two compression sleeves 603. A positioning column 503 sleeved with the compression sleeve 603 is fixedly connected to the end surface of the diversion valve 502. The compression sleeve 603 and the positioning column 503 are sleeved and assembled, which is convenient for the compression sleeve 603 to accurately squeeze and deform the diversion valve 502. The top of the upper bracket 601 is threadedly connected with an adjusting threaded column 605, and the adjusting threaded column 605 is movably connected to the top end of the compression sleeve 603. The adjusting threaded column 605 can adjust the height of the compression sleeve 603. The adjusting threaded column 605 is rotated and adjusted within the working threshold range to appropriately lower and raise the compression sleeve 603. See the attached drawings for details. By appropriately changing the height of the compression sleeve 603, the starting position of the movement of the compression sleeve 603 is adjusted, and the distance from the starting position of the compression sleeve 603 to the position where it exerts pressure on the diversion valve 502 is adjusted. The longer this distance is, the higher the temperature threshold is, so that the detection device can adapt to experiments in different temperature environments.

[0048] Embodiment 2:

[0049] The present invention provides a lithium battery multi-environment endurance detection device. Compared with Embodiment 1, for details, refer to the attached Figure 8 , in this embodiment, the adjusting threaded column 605 is adjusted to the highest position that can be tightened. In this state, the compression sleeve 603 is at the highest position. When the compression sleeve 603 is in this position, even if the ejection piston 701 extends completely and the lifting piece 6 descends to the lowest position, the compression sleeve 603 will not squeeze and deform the diversion valve 502. Therefore, the cold air duct 5 does not provide heat dissipation effect to the vibration test chamber 2, and the temperature inside the vibration test chamber 2 is not restricted, simulating the discharge situation of the lithium battery in a linearly heated environment in reality.

[0050] Embodiment 3:

[0051] The present invention provides a lithium battery multi-environment endurance detection device. Compared with Embodiment 1, for details, please refer to the appendix Figure 9-10 , in this embodiment, the adjusting threaded column 605 is adjusted to the lowest position where it can be tightened. In this state, the pressing sleeve 603 is in the lowest position. When the pressing sleeve 603 is in this position, the ejecting piston 701 does not need to extend, and the lifting piece 6 does not descend. The pressing sleeve 603 always maintains the squeezing deformation of the diversion valve flap 502. Therefore, the cold air pipe 5 continuously conducts air-cooled heat dissipation on the vibration test chamber body 2, and the internal temperature of the vibration test chamber body 2 always remains in the lowest state, simulating the discharge situation of the lithium battery in a good usage environment in reality.

[0052] Embodiment 4:

[0053] The present invention provides a lithium battery multi-environment endurance detection device. Please refer to Figure 11 , inside the detection placement clamp box 3, there is a lithium battery mesh bag 10. The lithium battery mesh bag 10 is made of metal wire. Through the lithium battery mesh bag 10, it is convenient to replace the lithium battery. At the same time, the lithium battery mesh bag 10 wraps the lithium battery to be detected, facilitating the cleaning of the lithium battery in case of an accident. Two parallel tension wires 1001 are movably connected to the middle of the lithium battery mesh bag 10, and test balls 1002 are sleeved outside the tension wires 1001. The two groups of test balls 1002 are symmetrically arranged with respect to the horizontal midline of the lithium battery mesh bag 10. When the lithium battery in the lithium battery mesh bag 10 bulges, the middle of the lithium battery bulges and pushes the test balls 1002 on the two tension wires 1001 away, increasing the distance between the two tension wires 1001, realizing the pulling of both ends of the tension wires 1001. Both ends of the lithium battery mesh bag 10 are fixedly connected with detection tubes 1003, and a lifting plug 1004 is movably connected inside the detection tubes 1003. The ejecting spring 1005 pushes the lifting plug 1004 to lift upward. When the tension wires 1001 are stressed, a downward pulling force is applied to the lifting plug 1004, realizing that when the lithium battery bulges, the lifting plug 1004 in the detection tube 1003 makes a downward movement;

[0054] Please refer to Figure 12-13, a tip liquid sac 1006 is fixedly connected to the top end of the detection tube 1003, and the bottom end of the tip liquid sac 1006 is fixedly connected to the top end of the lifting plug 1004. The top end of the detection tube 1003 penetrates through the sealing cover 4. When the lifting plug 1004 is pushed upward by the elastic force of the ejecting spring 1005, it presses the tip liquid sac 1006. At this time, the tip liquid sac 1006 is squeezed flat. When the lifting plug 1004 descends, the tip liquid sac 1006 resumes its original shape. There is a change in the thickness between the squeezed flat tip liquid sac 1006 and the restored tip liquid sac 1006. The tip liquid sac 1006 is made of transparent plastic, and the inside of the tip liquid sac 1006 is filled with a pigment solution. The color of the lifting plug 1004 is different from the color of the pigment solution filled in the tip liquid sac 1006. In the state where the tip liquid sac 1006 is squeezed flat, the tip liquid sac 1006 at the top of the lifting plug 1004 becomes thinner due to the internal pigment solution, so that the lifting plug 1004 can be directly observed through the transparent tip liquid sac 1006. On the contrary, when there is sufficient pigment solution in the tip liquid sac 1006, the lifting plug 1004 cannot be observed. Whether the lithium battery bulges is reflected by different situations, which is convenient for the staff to timely understand the situation of the lithium battery and prevent the occurrence of safety accidents.

[0055] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application, according to the technical solution and its improved concept of the present application, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

Claims

1. A lithium battery multi-environment endurance detection device, comprising a device body (1), and a vibration test chamber body (2) is movably connected inside the device body (1). A detection placement clip box (3) and a closed cover (4) are detachably sleeved inside and on the top of the vibration test chamber body (2) respectively. It is characterized in that, On the four corners of the side surface of the vibration test chamber body (2), cold air pipes (5) are all connected through, and diversion openings (501) are arranged on the surface of the cold air pipes (5). On the outer sides of both sides of the detection placement clip box (3), support pages (9) are fixedly connected, and grooves for clamping with the cold air pipes (5) are arranged on the surface of the support pages (9). On one side inside the diversion opening (501), a diversion valve flap (502) is fixedly connected. On the outer sides of both sides of the detection placement clip box (3), lifting pieces (6) are movably connected, and an upper support (601) and a lower support (602) are respectively fixedly connected to the top and bottom of the lifting piece (6). Compression sleeves (603) are sleeved inside both the upper support (601) and the lower support (602), and a connecting rod (604) is fixedly connected between the two compression sleeves (603). A positioning post (503) sleeved with the compression sleeve (603) is fixedly connected to the end surface of the diversion valve flap (502). An adjusting threaded column (605) is threadedly connected to the top of the upper support (601), and the adjusting threaded column (605) is movably connected to the top end of the compression sleeve (603); On both sides of the detection placement clip box (3), expansion oil storage chambers (7) are inlaid, and the side surface of the expansion oil storage chamber (7) protrudes outward and is sleeved with the lifting piece (6). A top piston (701) is movably connected to the bottom of the expansion oil storage chamber (7), and the bottom end of the top piston (701) is fixedly connected to the bottom of the lifting piece (6). A return spring (702) is fixedly connected between the top of the expansion oil storage chamber (7) and the top of the lifting piece (6).

2. The multi-environment endurance detection device for a lithium battery according to claim 1, wherein Heat insulation layers are coated on the inner surfaces of the four cold air pipes (5), and one ends of the four cold air pipes (5) are commonly connected to a heat dissipation fan (8).

3. The multi-environment endurance detection device for a lithium battery according to claim 1, characterized in that, The diversion valve flap (502) is semicircularly arranged and flush with the inner wall of the cold air pipe (5), and the diversion valve flap (502) is made of an elastic high-temperature resistant material.

4. A lithium battery multi-environment endurance detection device according to claim 1, characterized in that, A lithium battery mesh bag (10) is placed inside the detection placement clip box (3), and the lithium battery mesh bag (10) is made of metal wires.

5. The multi-environment endurance detection device for a lithium battery according to claim 4, wherein, The inner surface of the expansion oil storage chamber (7) corresponds to the lithium battery mesh bag (10), and the inner surface of the expansion oil storage chamber (7) is made of a wear-resistant metal material.

6. The multi-environment endurance detection device for a lithium battery according to claim 4, wherein Two parallel tension wires (1001) are movably connected to the middle of the lithium battery mesh bag (10), and test balls (1002) are sleeved outside the tension wires (1001). The two groups of test balls (1002) are symmetrically arranged with respect to the horizontal midline of the lithium battery mesh bag (10).

7. The multi-environment endurance detection device for a lithium battery according to claim 6, characterized in that, Detection tubes (1003) are fixedly connected to both ends of the lithium battery mesh bag (10), and a lifting plug (1004) is movably connected inside the detection tubes (1003). The two ends of the two tension wires (1001) respectively penetrate through the detection tubes (1003) and are fixedly connected to the bottom end of the lifting plug (1004). A top spring (1005) is fixedly connected to the bottom of the lifting plug (1004).

8. The multi-environment endurance detection device for a lithium battery according to claim 7, characterized in that The top end of the detection tube (1003) is fixedly connected with a prompt liquid sac (1006), and the bottom end of the prompt liquid sac (1006) is fixedly connected with the top end of the lifting plug (1004). The top end of the detection tube (1003) penetrates through the sealing cover (4).

9. The multi-environment endurance detection device for a lithium battery according to claim 8, characterized in that, The prompt liquid sac (1006) is made of transparent plastic, and the inside of the prompt liquid sac (1006) is filled with a pigment solution. The color of the lifting plug (1004) is different from the color of the pigment solution filled in the prompt liquid sac (1006).

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