A test device for testing the resistance of lithium battery termination tape to dynamic cyclic immersion in electrolyte.

Abstract

This invention belongs to the field of termination tape testing technology, specifically a dynamic cyclic immersion test device for lithium battery termination tape in electrolyte. It includes an insulation box, a heating mechanism symmetrically arranged inside the insulation box, a testing mechanism and a control mechanism installed inside the heating mechanism, and an auxiliary pasting mechanism slidably connected to the outside of the testing mechanism. It also includes a pump box installed between two heating mechanisms; a return pipe symmetrically arranged outside the heating mechanism; and connecting pipes installed on both sides of the pump box. This invention, through the testing mechanism, allows the tape strip to be sequentially pasted onto the upper surfaces of a corner test plate, a ribbed test plate, a perforated plate, and an arc-shaped plate. The viscosity of the tape strip after pasting onto product surfaces of different shapes and flatnesses and then being immersed and washed by electrolyte is tested. By comparing the adhesion of the same tape strip on different pasting surfaces, the conformal ability and extensibility of the tape strip are determined.

Description

Technical Field

[0001] This invention belongs to the field of termination tape testing technology, specifically a test device for the resistance of lithium battery termination tape to dynamic cyclic immersion in electrolyte. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. They are widely used in electronic devices such as mobile phones, automobiles, and laptops. Various adhesive tapes are used inside lithium battery cells to improve the battery's safety and stability. These tapes need to be immersed in high-temperature electrolyte for extended periods, therefore they must have excellent electrolyte resistance and stable adhesion to prevent detachment and blistering.

[0003] In order to ensure that lithium batteries have good stability under extreme high-temperature conditions such as production and use, the use of tape needs to ensure that the lithium batteries can maintain structural stability and chemical properties for a long time in high-temperature environments, without problems such as short circuits, leakage, and liquid leakage, and can adapt to various spatial bonding.

[0004] However, existing tapes are all for bonding two planes and are all flat application tapes. They cannot meet the testing requirements for different surfaces, not just planes, as well as corrosion resistance and electrolyte resistance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical solution adopted by this invention is: a dynamic cyclic immersion test device for lithium battery termination tape to withstand electrolyte, comprising an insulated box, and further comprising: The heating mechanism is symmetrically arranged inside the heat preservation box, the test mechanism and the control mechanism are installed inside the heating mechanism, and the auxiliary pasting mechanism is slidably connected to the outside of the test mechanism; The auxiliary pasting mechanism includes a movable block slidably connected to both sides of the testing mechanism, a telescopic rod disposed outside the movable block and a support rod installed above the telescopic rod, a pasting component installed on the opposite side of the support rod, and a peel detection component installed above the pasting component.

[0006] Furthermore, it also includes: A pump housing, which is installed between two heating mechanisms; A return pipe is symmetrically arranged outside the heating mechanism, and the return pipe is installed on opposite sides of the heating mechanism; The connecting pipe is installed on both sides of the pump box and is located below the return pipe. The two storage tanks are connected through the return pipe, so that the test mechanism and the control mechanism are in the same electrolyte environment in the two storage tanks. The pump box circulates the electrolyte repeatedly to simulate the dynamic flow and permeation behavior of the electrolyte inside the battery driven by various factors. A sealing cap is installed above the testing and control units.

[0007] Furthermore, the heating mechanism includes: The lifting columns are symmetrically arranged inside the insulated box and installed at the bottom of the insulated box; A liquid storage tank is installed above the lifting column, and the liquid storage tank contains electrolyte. A heating jacket is installed outside the storage tank to heat the storage tank, simulating the ambient temperature of the electrolyte during normal use. A placement frame is installed inside the liquid storage tank, and the testing mechanism is positioned above the placement frame.

[0008] Furthermore, the testing facility includes: The first test stand is placed above the mesh frame. A cavity is opened on one side of the first test stand, and a liquid collection tank is opened at the bottom of the first test stand. A water pump is installed inside the cavity, and a thin tube is installed inside the liquid collection tank to discharge the electrolyte inside the first test stand out through a one-way valve. A one-way valve is installed on the outside of the first test bench at the end away from the cavity. The one-way valve is a one-way sealing valve. When the electrolyte enters the first test bench from the groove, the electrolyte is discharged from the inside by the change of air pressure.

[0009] Furthermore, the testing facility also includes: The first telescopic column is evenly arranged inside the first test platform, and a corner test plate, a horizontal stripe test plate, a perforated plate and an arc plate are respectively arranged above the first telescopic column. Adhesive tape strip, said adhesive tape strip is attached to the top of the first test bench; A boss is provided above the first test plate. The boss is used to stick one end of the tape strip, so that the tape strip can be peeled off after testing.

[0010] Furthermore, the comparison mechanism includes: The second test platform is located above the placement frame away from the testing mechanism. Both the second test platform and the first test platform have four grooves on their tops. The top of the second test platform is sealed by a sealing sheet. The second telescopic column is evenly arranged inside the second test platform. A concave panel, a bearing plate, a fixing groove and an airbag are respectively arranged above the second telescopic column.

[0011] Furthermore, the comparison mechanism further includes: A sealing sheet is installed above the second test bench. The inner arc surface of the concave panel is connected to the bottom of the sealing sheet. The sealing sheet is made of corrosion-resistant rubber with good elasticity. The roller has two ends that are rotatably connected to the inside of the fixing groove, and the outside of the roller is provided with protrusions, which can detect the dynamic adhesion ability of the tape strip when it is pasted. The movable columns are positioned above the bearing plate and are staggered upwards, causing the adhesive strips on the sealing sheet to be subjected to irregular external force compression.

[0012] Furthermore, the adhesive component includes: A grip bar, which is rotatably connected to the opposite side of the support rod, is rotatable on the support rod and can be locked in position; The extrusion strip is installed below the handle. The extrusion strip has a resilient material that simulates the feel of a human hand smoothing the surface of the tape, allowing the tape to adhere better and more tightly when it is applied. The scraper is symmetrically arranged on both sides of the extrusion bar. The upper part of the scraper is rotatably connected to the lower part of the handle. The scraper is made of corrosion-resistant rubber and is deformable and can be rotated open.

[0013] Furthermore, the peel detection component includes: Mounting block, the mounting block being disposed at the end of the handle away from the scraper; The sensor, which is a tension sensor, is positioned above the mounting block. A connecting rod, which is mounted above the sensor, is an L-shaped rod and is connected to a tension sensor to measure the force when the tape is peeled off. A rotating shaft is mounted on the outside of the connecting rod and rotates along the axis of the connecting rod.

[0014] Furthermore, the stripping assembly also includes: The toothed blocks are symmetrically arranged at both ends of the rotating shaft, and the toothed blocks are arranged along the outer circumference of the rotating shaft; A gear, which is rotatably connected within a mounting block and meshes with the gear block; A locking rod, which is inserted into the inside of the rotating shaft, and can be inserted into and locked inside the rotating shaft; A clamping plate is fitted over the outside of the locking rod. The clamping plate is made of corrosion-resistant rubber and has a serrated groove at one end near the rotating shaft to facilitate fixing one end of the tape between the clamping plate and the rotating shaft.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses a testing mechanism to sequentially adhere adhesive tape to the upper surfaces of a corner test plate, a ribbed test plate, a perforated plate, and an arc-shaped plate. The adhesive tape is then adhered to product surfaces of different shapes and flatnesses, and its viscosity is tested after being immersed in and washed with electrolyte. Since electrolyte may enter through gaps between the edges of the corner test plate, ribbed test plate, perforated plate, and arc-shaped plate and the first test platform, a water pump is activated when the electrolyte accumulates to a certain height, extracting the electrolyte from inside the first test platform. This reduces the amount of electrolyte immersing the platform and prevents corrosion. By testing the adhesion of the same adhesive tape to different surfaces, the conformal ability and extensibility of the adhesive tape are determined.

[0016] 2. This invention, by setting an auxiliary pasting mechanism, straightens the other end of the tape strip, so that the pasting component contacts and presses against the top of the tape strip. Along the pasting direction of the tape strip, from one end to the other, the tape strip is pasted while scraping and pressing, so that the tape strip is pasted flat. Then it is removed, and the testing mechanism is immersed in the electrolyte for testing. Finally, when the tape strip is peeled off, the peel detection component is fixed to one end of the tape strip, and it is pulled in opposite directions again, so that the peel detection component tests the force required to peel off the tape strip, which facilitates the observation of the viscosity of the tape strip after the test.

[0017] 3. This invention, by setting up a comparison mechanism, brings the concave panel, the support plate, the fixing groove, and the airbag close to the bottom of the sealing sheet. The airbag inflates, causing the sealing sheet to bulge upwards, thus stretching the tape strip. The support plate drives the roller to rotate, causing the tape strip on the sealing sheet to vibrate irregularly. The movable column moves irregularly up and down, causing small-range agitation of the tape strip. This allows for the detection of the tape strip's viscosity after immersion in electrolyte under dynamic conditions. It can test the tape's dynamic following ability, fatigue resistance, interfacial toughness, and deformation-corrosion coupling resistance under dynamic working conditions.

[0018] 4. This invention, by setting up a peel detection component, allows manual movement of the handle to peel off the tape strip in the reverse direction. During this process, no additional force is applied to the tape strip and the rotating shaft, causing the rotating shaft to be stretched by the tape strip, which in turn causes the tension sensor to generate a value. The change in force generated when peeling the tape strip on different test module surfaces in sequence is used to test the adhesiveness of the tape strip on different surfaces by measuring the different peeling forces on surfaces with different flatness, and to predict the long-term durability of the tape on real complex surfaces. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the heating mechanism of the present invention; Figure 4 This is a schematic diagram of the testing mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the reference mechanism of the present invention; Figure 6 This is a schematic diagram of the auxiliary pasting mechanism of the present invention; Figure 7 This is a schematic diagram of the adhesive component of the present invention; Figure 8 This is a schematic diagram of the structure of the peel detection component of the present invention.

[0020] In the diagram: 1. Insulation box; 2. Heating mechanism; 201. Lifting column; 202. Liquid storage tank; 203. Heating jacket; 204. Placement frame; 3. Testing mechanism; 301. First test platform; 302. Adhesive strip; 303. Cavity; 304. Liquid collection tank; 305. One-way valve; 306. First telescopic column; 307. Corner test plate; 308. Horizontal stripe test plate; 309. Perforated plate; 310. Arc plate; 311. Boss; 4. Comparison mechanism; 401. Second test platform; 402. Second telescopic column; 403. Concave panel; 404. Support plate; 405. Movable column 406. Fixing groove; 407. Roller; 408. Sealing plate; 409. Airbag; 5. Pump box; 6. Return pipe; 7. Auxiliary pasting mechanism; 701. Moving block; 702. Telescopic rod; 703. Support rod; 704. Pasting assembly; 7041. Handle; 7042. Extrusion strip; 7043. Scraper; 705. Peel detection assembly; 7051. Mounting block; 7052. Sensor; 7053. Connecting rod; 7054. Rotating shaft; 7055. Tooth block; 7056. Locking rod; 7057. Pressing plate; 7078. Gear; 8. Connecting pipe; 9. Sealing cover. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] Example 1, please refer to Figures 1-5The present invention provides a technical solution: a lithium battery termination tape resistance to electrolyte dynamic cyclic immersion test device, which is described below.

[0023] Including insulated box 1, it also includes: A heating mechanism 2 is symmetrically arranged inside the heat preservation box 1, a testing mechanism 3 and a control mechanism 4 are installed inside the heating mechanism 2, and an auxiliary pasting mechanism 7 is slidably connected to the outside of the testing mechanism 3; Also includes: Pump housing 5 is installed between the two heating mechanisms 2; Return pipe 6 is symmetrically arranged outside the heating mechanism 2, and the return pipe 6 is installed on the opposite side of the heating mechanism 2; Connecting pipe 8 is installed on both sides of pump box 5 and is located below return pipe 6. The two storage tanks 202 are connected through return pipe 6, so that the test mechanism 3 and the control mechanism 4 are in the same electrolyte environment in the two storage tanks 202. Pump box 5 circulates the electrolyte repeatedly to simulate the dynamic flow and permeation behavior of electrolyte inside the battery driven by various factors. The sealing cover 9 is installed above the test unit 3 and the control unit 4.

[0024] During operation, the tape strip 302 is cut and pasted into the inside of the test unit 3 and the control unit 4. Electrolyte is filled into the heating unit 2, and the sealing cover 9 seals the heating unit 2. Then, the electrolyte is heated to simulate the working environment of the battery. Under the action of the pump box 5, the electrolyte circulates between the two heating units 2 to simulate the dynamic flow and permeation behavior of the electrolyte inside the battery driven by various factors, and to enable the test unit 3 and the control unit 4 to be tested under the same environment.

[0025] The auxiliary pasting mechanism 7 includes a movable block 701 slidably connected to both sides of the test mechanism 3, a telescopic rod 702 disposed outside the movable block 701, a support rod 703 mounted above the telescopic rod 702, a pasting component 704 mounted on the opposite side of the support rod 703, and a peel detection component 705 mounted above the pasting component 704.

[0026] Before testing, the tape strip 302 needs to be attached to the first test platform 301. First, attach one end of the tape strip 302 to the surface of the first test platform 301. Then, install the auxiliary attaching mechanism 7 on both sides of the first test platform 301. The moving block 701 drives the attaching component 704 and the peel detection component 705 on the support rod 703 to one end of the first test platform 301, positioned above the tape strip 302. Straighten the other end of the tape strip 302 so that the attaching component 704 contacts and presses against the top of the tape strip 302. Along the pasting direction of the tape strip 302, from one end to the other, the tape strip 302 is scraped and pressed to adhere it, making the tape strip 302 flat. Then it is removed, and the testing unit 3 is immersed in the electrolyte for testing. Finally, when the tape strip 302 is peeled off, the peel detection component 705 is fixed to one end of the tape strip 302, and it is pulled in opposite directions to test the force required to peel off the tape strip 302, so as to facilitate the observation of the viscosity of the tape strip 302 after the test.

[0027] Heating mechanism 2 includes: Lifting columns 201 are symmetrically arranged inside the insulation box 1 and installed at the bottom of the insulation box 1. The liquid storage tank 202 is installed above the lifting column 201, and the liquid storage tank 202 is filled with electrolyte. Heating jacket 203 is installed outside the liquid storage tank 202. Heating jacket 203 heats the liquid storage tank 202 to simulate the ambient temperature of the electrolyte during normal use. A mesh frame 204 is placed inside the liquid storage tank 202, and the testing mechanism 3 is positioned above the mesh frame 204.

[0028] During testing, electrolyte is added to the storage tank 202, and the heating jacket 203 is energized to raise the temperature, simulating the temperature changes during normal battery use. The test mechanism 3 and the control mechanism 4 are placed in the storage tank 202, the sealing cover 9 is closed, and then the heat preservation box 1 is covered to conduct the experiment.

[0029] Testing organization 3 includes: The first test stand 301 is placed above the mesh frame 204. A cavity 303 is opened on one side of the first test stand 301, and a liquid collection tank 304 is opened at the bottom of the first test stand 301. A water pump is installed inside the cavity 303, and a thin tube is installed inside the liquid collection tank 304 to discharge the electrolyte inside the first test stand 301 to the outside through the one-way valve 305. One-way valve 305 is installed on the outside of the first test bench 301 at the end away from the cavity 303. One-way valve 305 is a one-way sealing valve. When the electrolyte enters the first test bench 301 from the groove, the electrolyte is discharged from the inside by the change of air pressure.

[0030] Testing facility 3 also includes: The first telescopic column 306 is evenly arranged inside the first test bench 301. A corner test plate 307, a horizontal stripe test plate 308, a perforated plate 309 and an arc plate 310 are respectively arranged above the first telescopic column 306. Adhesive tape 302 is attached to the top of the first test stand 301; The boss 311 is located above the first test plate. The boss 311 is used to stick one end of the tape strip 302, so that the tape strip 302 can be peeled off after testing.

[0031] Before testing, the first telescopic column 306 moves the corner test plate 307, the horizontal ridge test plate 308, the perforated plate 309, and the arc plate 310 upwards, making their upper surfaces higher than the surface of the first test platform 301. Then, one end of the adhesive tape 302 is pasted onto the boss 311. Subsequently, driven by the auxiliary pasting mechanism 7, the adhesive tape 302 is pasted onto the upper surfaces of the corner test plate 307, the horizontal ridge test plate 308, the perforated plate 309, and the arc plate 310 in sequence, respectively, on product surfaces with different shapes and flatness. The viscosity of the adhesive tape 302 is tested after it is pasted and then soaked and washed by the electrolyte. The edges of the corner test plate 307, the horizontal stripe test plate 308, the perforated plate 309 and the arc plate 310 may enter the first test platform 301 through the gaps. When the electrolyte accumulates to a certain height, the water pump is turned on to extract the electrolyte from the inside of the first test platform 301, reducing the amount of electrolyte soaking into the inside of the first test platform 301 and avoiding corrosion. The conformal ability and extensibility of the adhesive tape 302 are judged by the adhesion of the same tape strip 302 on different pasting surfaces.

[0032] Reference institution 4 includes: The second test platform 401 is located above the placement frame 204, which is far away from the test mechanism 3. The second test platform 401 and the first test platform 301 are both provided with four grooves on their tops. The top of the second test platform 401 is sealed by a sealing sheet 408. The second telescopic column 402 is evenly arranged inside the second test platform 401. The second telescopic column 402 is provided with a concave panel 403, a bearing plate 404, a fixing groove 406 and an airbag 409 on its upper side.

[0033] Reference organization 4 also includes: The sealing sheet 408 is installed above the second test bench 401. The inner arc surface of the concave panel 403 is connected to the bottom of the sealing sheet 408. The sealing sheet 408 is made of corrosion-resistant rubber with good elasticity. The roller 407 has two ends that are rotatably connected to the inside of the fixing groove 406. The outside of the roller 407 is provided with protrusions, which can detect the dynamic adhesion ability of the tape strip 302 when it is pasted. The movable column 405 is positioned above the bearing plate 404. The movable columns 405 are staggered and pushed upwards, causing the tape strip 302 on the sealing sheet 408 to be subjected to irregular external force compression.

[0034] Using the same method described above, the second tape strip 302 is attached to the second test stand 401. At this time, the tape strip 302 is still firmly attached to the sealing sheet 408. Then, the electrolyte is injected into the storage tank 202, and the test is started. During the test, the second telescopic column 402 rises, bringing the concave panel 403, the support plate 404, the fixing groove 406, and the airbag 409 close to the bottom of the sealing sheet 408. The airbag 409 inflates, causing the sealing sheet 408 to bulge upwards, thus stretching the tape strip 302. The support plate 404 drives the roller 407 to rotate, causing the tape strip 302 on the sealing sheet to vibrate irregularly. The movable column 405 moves up and down irregularly, causing the tape strip 302 to vibrate in a small range. This tests the adhesion of the tape strip 302 after immersion in the electrolyte under dynamic conditions. The dynamic following performance, fatigue resistance, interfacial toughness, and deformation-corrosion coupling resistance of the tape under dynamic working conditions can be tested.

[0035] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: based on embodiment 1, the adhesive component 704 includes: The grip 7041 is rotatably connected to the opposite side of the support rod 703, and the grip 7041 can rotate on the support rod 703 and lock in position; The extrusion strip 7042 is installed below the handle 7041. The extrusion strip 7042 has a springy material that simulates the feel of a human hand smoothing the surface of the tape strip 302, which can make the tape strip 302 stick better and more tightly when it is pasted. The scraper 7043 is symmetrically arranged on both sides of the extrusion bar 7042. The upper part of the scraper 7043 is rotatably connected to the lower part of the handle 7041. The scraper 7043 is made of corrosion-resistant rubber material and can be deformed and rotated to open.

[0036] When applying the tape strip 302, one end of the tape strip 302 is adhered to the boss 311. Then, the handle 7041 is positioned above the tape strip 302, the tape strip 302 is straightened, and brought close to the first test platform 301. The handle 7041 is manually moved along the surface of the first test platform 301, causing the scraper 7043 in the moving direction to fall downwards, scraping the tape strip 302 after it contacts the first test platform 301. Simultaneously, the extrusion strip 7042 provides elastic extrusion, pressing the tape strip 302 against the first test platform 301. The corner test plate 307, horizontal stripe test plate 308, perforated plate 309, and curved plate 310 on 01 are bonded together. The bottom of the scraper has a thin and elastic adhesive, which can make a certain elastic adjustment when the tape comes into contact with uneven surfaces, so that the tape adheres better to the surfaces of the corner test plate 307, horizontal stripe test plate 308, perforated plate 309, and curved plate 310, reducing the retention of air bubbles and avoiding the need for manual application of pre-cut tape strips 302, which are prone to leaving air bubbles and affecting the test. After the bonding is completed, the entire component is removed.

[0037] The peel detection component 705 includes: Mounting block 7051 is located at the end of handle 7041 away from scraper 7043; Sensor 7052 is located above mounting block 7051 and is a tension sensor 7052. Connecting rod 7053 is installed above sensor 7052. Connecting rod 7053 is L-shaped and connected to tension sensor 7052 to measure the force when peeling off tape. The rotating shaft 7054 is mounted on the outside of the connecting rod 7053 and rotates along the axis of the connecting rod 7053.

[0038] The stripping components also include: Tooth blocks 7055 are symmetrically arranged at both ends of the rotating shaft 7054, and the tooth blocks 7055 are arranged along the outer circular surface of the rotating shaft 7054; Gear 7078 is rotatably connected within mounting block 7051, and gear 7078 meshes with gear block 7055; Locking rod 7056 is inserted into the inside of rotating shaft 7054, and locking rod 7056 can be inserted into and locked inside rotating shaft 7054; The clamping plate 7057 is sleeved on the outside of the locking rod 7056. The clamping plate 7057 is made of corrosion-resistant rubber. A serrated groove is provided at one end near the rotating shaft 7054 to facilitate fixing one end of the tape between the clamping plate 7057 and the rotating shaft 7054.

[0039] After the test is completed, the component is reinstalled, the handle 7041 is rotated, and the adhesive component 704 is facing upwards. At this time, it is pasted to the boss 311. The pre-reserved tape strip 302 is peeled off slightly, and the end of the tape strip 302 is inserted between the clamping plate 7057 and the rotating shaft 7054. Then, the locking rod 7056 is pressed to connect one end of the tape strip 302 to the rotating shaft 7054. Then, the handle 7041 is manually moved to peel off the tape strip 302 in the opposite direction. During this process, no additional force is applied to the tape strip 302 and the rotating shaft 7054, so that the rotating shaft 7054 is stretched by the tape strip 302, which drives the tension sensor 7052 to generate a value. The change in force generated when peeling the tape strip 302 on different test module surfaces in sequence is used to test the adhesion of the tape strip 302 on different surfaces with different flatness, and to predict the long-term durability of the tape on real complex surfaces.

[0040] The specific workflow is as follows: During operation, the tape strip 302 is cut and pasted into the inside of the test unit 3 and the control unit 4. Electrolyte is filled into the heating unit 2, and the sealing cover 9 seals the heating unit 2. Then the electrolyte is heated to simulate the working environment of the battery. Under the action of the pump box 5, the electrolyte circulates between the two heating units 2 to simulate the dynamic flow and permeation behavior of the electrolyte inside the battery driven by various factors, and to enable the test unit 3 and the control unit 4 to be tested under the same environment. Before testing, the tape strip 302 needs to be attached to the first test platform 301. First, one end of the tape strip 302 is attached to the surface of the first test platform 301. Then, the auxiliary attaching mechanism 7 is installed on both sides of the first test platform 301. The moving block 701 drives the attaching component 704 and the peel detection component 705 on the support rod 703 to one end of the first test platform 301, above the tape strip 302. The other end of the tape strip 302 is straightened, so that the attaching component 704 contacts and presses against the top of the tape strip 302. Following the attaching direction of the tape strip 302, the component moves from one end to the other, pressing the tape strip 302... The tape strip 302 is applied smoothly by scraping and pressing it along the edge. Then it is removed and the tape strip 302 is applied to the upper surface of the corner test plate 307, the horizontal stripe test plate 308, the perforated plate 309 and the arc plate 310 in sequence. The viscosity of the tape strip 302 after being applied to the surface of the product with different shapes and flatness is tested after being immersed and washed by the electrolyte. During the test, the electrolyte is added to the storage tank 202 and the heating jacket 203 is energized to raise the temperature to simulate the temperature change during normal use of the battery. The test mechanism 3 and the control mechanism 4 are placed in the storage tank 202, the sealing cover 9 is closed, and then the heat preservation box 1 is covered.

[0041] Using the same method described above, the second tape strip 302 is attached to the second test stand 401. At this time, the tape strip 302 is still firmly attached to the sealing sheet 408. Then, the electrolyte is injected into the storage tank 202, and the test is started. During the test, the second telescopic column 402 rises, bringing the concave panel 403, the support plate 404, the fixing groove 406, and the airbag 409 close to the bottom of the sealing sheet 408. The airbag 409 inflates, causing the sealing sheet 408 to bulge upwards, thus stretching the tape strip 302. The support plate 404 drives the roller 407 to rotate, causing the tape strip 302 on the sealing sheet to vibrate irregularly. The movable column 405 moves up and down irregularly, causing the tape strip 302 to vibrate in a small range. This tests the adhesion of the tape strip 302 after immersion in the electrolyte under dynamic conditions. The dynamic following performance, fatigue resistance, interfacial toughness, and deformation-corrosion coupling resistance of the tape under dynamic working conditions can be tested.

[0042] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A kind of lithium battery termination adhesive tape electrolyte dynamic cycle immersion test device, comprising incubator (1), characterized by, Also includes: A heating mechanism (2) symmetrically arranged inside the heat preservation box (1), a test mechanism (3) and a control mechanism (4) installed inside the heating mechanism (2), and an auxiliary pasting mechanism (7) slidably connected to the outside of the test mechanism (3). The auxiliary pasting mechanism (7) includes a movable block (701) slidably connected to both sides of the test mechanism (3), a telescopic rod (702) disposed outside the movable block (701), a support rod (703) mounted above the telescopic rod (702), a pasting component (704) mounted on the opposite side of the support rod (703), and a peel detection component (705) mounted above the pasting component (704).

2. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 1, characterized in that: Also includes: Pump housing (5), which is installed between the two heating mechanisms (2); Return pipe (6), the return pipe (6) is symmetrically arranged outside the heating mechanism (2), and the return pipe (6) is installed on the opposite side of the heating mechanism (2); Connecting pipe (8), the connecting pipe (8) is installed on both sides of the pump box (5), and the connecting pipe (8) is located below the return pipe (6); A sealing cap (9) is installed above the testing mechanism (3) and the control mechanism (4).

3. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 1, characterized in that: The heating mechanism (2) includes: Lifting column (201), the lifting column (201) is symmetrically arranged inside the heat preservation box (1), and the lifting column (201) is installed at the bottom of the heat preservation box (1); A liquid storage tank (202) is installed above the lifting column (201); A heating jacket (203) is disposed outside the liquid storage tank (202); A placement frame (204) is installed inside the liquid storage tank (202), and the testing mechanism (3) is positioned above the placement frame (204).

4. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 3, characterized in that: The testing facility (3) includes: The first test platform (301) is placed above the mesh frame (204). A cavity (303) is provided on one side of the first test platform (301), and a liquid collection tank (304) is provided at the bottom of the first test platform (301). A one-way valve (305) is installed on the outside of the first test bench (301) away from the cavity (303).

5. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 4, characterized in that: The testing facility (3) also includes: The first telescopic column (306) is evenly arranged inside the first test platform (301). A corner test plate (307), a horizontal stripe test plate (308), a perforated plate (309) and an arc plate (310) are respectively arranged above the first telescopic column (306). Adhesive tape (302), said adhesive tape (302) is attached above the first test stand (301); A boss (311) is disposed above the first test plate.

6. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 1, characterized in that: The control mechanism (4) includes: The second test stand (401) is located above the placement frame (204) away from the test mechanism (3); The second telescopic column (402) is evenly arranged inside the second test platform (401). The second telescopic column (402) is provided with a concave panel (403), a bearing plate (404), a fixing groove (406) and an airbag (409) above it.

7. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 6, characterized in that: The reference mechanism (4) also includes: A sealing sheet (408) is installed above the second test bench (401), and the inner arc surface of the concave panel (403) is connected to the bottom of the sealing sheet (408). Roller (407), both ends of which are rotatably connected to the inside of the fixed groove (406); Movable column (405) is disposed above the support plate (404).

8. The lithium battery termination tape electrolyte resistance dynamic cycle immersion test device according to claim 1, characterized in that: The adhesive component (704) includes: A grip (7041) is rotatably connected to the opposite side of the support rod (703); An extrusion strip (7042) is installed below the grip (7041); The scraper (7043) is symmetrically arranged on both sides of the extrusion bar (7042), and the upper part of the scraper (7043) is rotatably connected to the lower part of the handle (7041).

9. The lithium battery termination tape electrolyte dynamic cyclic immersion test device according to claim 1, characterized in that: The peel detection component (705) includes: Mounting block (7051), said mounting block (7051) is disposed at the end of the handle (7041) away from the scraper (7043); Sensor (7052), the sensor (7052) is disposed above the mounting block (7051); A connecting rod (7053) is mounted above the sensor (7052); A rotating shaft (7054) is mounted on the outside of a connecting rod (7053).

10. The lithium battery termination tape electrolyte resistance dynamic cyclic immersion test device according to claim 9, characterized in that: The peel detection component (705) further includes: Tooth blocks (7055) are symmetrically arranged at both ends of the rotating shaft (7054) and are arranged along the outer circular surface of the rotating shaft (7054); Gear (7078), which is rotatably connected within mounting block (7051), and meshes with tooth block (7055); Locking rod (7056), which is inserted into the inside of rotating shaft (7054); A clamping plate (7057) is sleeved on the outside of the locking rod (7056).

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