Lithium battery extrusion test tool

Abstract

The utility model provides a lithium battery extrusion test tool, and belongs to the technical field of battery extrusion tests. The lithium battery extrusion test tool comprises a base and angle irons integrally manufactured and formed at four corners of the surface of the base, the top ends of the four angle irons are integrally manufactured and formed with four corners of the bottom of a top plate respectively, protection mechanisms are seamlessly welded to the outer walls of the angle irons, the surface of the top plate is provided with a mounting plate and a gas guide pipe, and an extrusion mechanism is mounted on the mounting plate through bolts. The movable end of the extrusion mechanism is arranged on the surface of the base, and a protection door is hinged to the outer wall of the protection mechanism. Through cooperative work of the protection mechanism, the mounting plate, the air guide pipe, the extrusion mechanism and the protection door, extreme conditions such as fragment splashing or explosion possibly generated in the extrusion test of the battery can be effectively handled; meanwhile, gas released during battery explosion can be effectively treated, and the position and extrusion force of the pressure head can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of battery extrusion testing, and in particular to a lithium battery extrusion testing tool. Background Art

[0002] With the rapid advancement of technology, lithium-ion batteries, thanks to their high energy density and long lifespan, have become widely used in our daily lives. Smartphones, electric vehicles, and large-scale energy storage systems all rely on this important energy storage device. However, during use, transportation, storage, and even recycling, lithium-ion batteries may be subject to external forces or penetration by sharp objects, posing safety risks. To ensure the safety of lithium-ion batteries in various extreme environments, researchers have developed a battery compression tester that simulates real-world compression conditions and conducts rigorous safety testing on batteries.

[0003] Battery squeeze testers, specialized equipment for testing battery extrusion performance, play a vital role in the quality inspection and R&D departments of battery manufacturers. During a lithium battery squeeze test, the battery is placed between two flat surfaces. A hydraulic pressure head equipped with a piston of a specific diameter applies squeezing force until the pressure reading on the hydraulic pressure head reaches a preset value, at which point the squeeze test is terminated. However, despite their important role in battery safety testing, traditional single-layer sealed test chambers still have significant shortcomings in terms of protection. When batteries explode or fragment during the squeeze process, single-layer sealed test chambers often fail to effectively prevent these dangerous situations from harming test personnel and equipment. Furthermore, when a battery explodes, a large amount of gas is rapidly released, which may contain toxic or hazardous substances. Traditional single-layer sealed test chambers, due to limitations in their sealing structure and design, often struggle to effectively prevent this gas release. Existing battery squeeze testers often struggle to precisely control the force applied during the squeeze, leading to over-squeezing of the battery. This not only affects the accuracy of test results but can also cause unnecessary damage to the battery's internal structure. Utility Model Content

[0004] In order to make up for the above deficiencies, the present application provides a lithium battery extrusion test tool to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0006] A lithium battery extrusion test tool comprises a base and a triangular iron integrally formed at the four corners of the base surface. The top ends of the four triangular irons are integrally formed with the four corners of the bottom of the top plate. A protective mechanism is seamlessly welded to the outer wall of the triangular iron. The top plate surface is provided with a mounting plate and an air guide tube. An extrusion mechanism is bolted to the mounting plate. The movable end of the extrusion mechanism is placed on the base surface. A protective door is hinged on the outer wall of the protective mechanism.

[0007] Furthermore, the protective mechanism includes an inner steel plate, an outer steel plate and a filler. The outer wall of the inner steel plate is integrally formed with the four triangles, the base and the inner wall of the top plate. The inner wall of the outer steel plate is integrally formed with the four triangles, the base and the outer wall of the top plate. The filler is placed between the inner steel plate, the outer steel plate and the four triangles.

[0008] Furthermore, the bottom end of the air guide tube is integrally formed with a corner of the top plate surface and is connected to the interior of the inner steel plate. The top of the air guide tube has an external thread and is threadedly connected to a filter core sleeve.

[0009] Furthermore, the extrusion mechanism includes a hydraulic cylinder, a through hole, two guide holes, a coupling, a connecting rod, a pressure head, two threaded columns and an adjusting nut. The fixed end of the hydraulic cylinder is bolted to the surface of the mounting plate, and the telescopic end is locked and connected to the top end of the coupling through the inside of the through hole. The surface of the top plate is respectively provided with the through hole and the two guide holes. The top end of the connecting rod is locked and connected to the bottom end of the coupling, and the bottom end is integrally formed with the surface of the pressure head. The bottom ends of the two threaded columns are respectively integrally formed with the two ends of the pressure head surface, and the outer walls are respectively fitted with the inner walls of the two guide holes. The inner rings of the two adjusting nuts are respectively threadedly connected to the outer walls of the two threaded columns, and the bottoms are fitted with the surface of the top plate.

[0010] Furthermore, the protective door includes a steel door, a first layer of explosion-proof glass, a second layer of explosion-proof glass and a fiber layer. One side of the steel door is hinged to one side of the outer steel plate, and the other side is locked to the other side of the outer steel plate, and a window is opened on the surface. The first layer of explosion-proof glass, the second layer of explosion-proof glass and the fiber layer are integrally manufactured, and the side wall is embedded in the window.

[0011] Furthermore, two auxiliary strips are provided on the base surface and the inner bottom of the inner steel plate.

[0012] Furthermore, a carrying box is provided on the surface of the base, and the bottom of the carrying box is slidably connected to the base and the surfaces of the two auxiliary strips.

[0013] Furthermore, a battery is placed on the carrier box, and the battery is squeezed by the bottom end of the pressing head.

[0014] The utility model has the following beneficial effects:

[0015] 1. The base, triangle and top plate of the utility model are all made into one piece, which enhances the structural stability and durability of the entire test tool, ensuring that it can maintain a stable shape during rigorous extrusion tests and is not easily deformed or damaged. In addition, this tool is also equipped with a protective mechanism composed of an inner steel plate, an outer steel plate and filler, as well as a composite structural protection door composed of a steel door, double-layer explosion-proof glass and a fiber layer. These designs together constitute a multiple protective barrier that can effectively deal with extreme situations such as flying fragments or explosions that may be generated by batteries during extrusion tests, thereby comprehensively protecting the personal safety of test personnel and the integrity of equipment. The use of filler not only further improves the strength and stability of the protective mechanism, but also significantly enhances the overall safety protection capabilities. At the same time, the design of the protective door not only guarantees the need for visual observation during the test, but also can resist the potential damage to the observation window caused by the explosion impact, ensuring that test personnel can clearly and accurately observe every detail and the entire process of the battery extrusion test in a safe environment.

[0016] 2. The design of the gas guide tube and filter core sleeve of this utility model ensures that the gas released in the event of a battery explosion can be promptly discharged and filtered, effectively preventing the threat of harmful gases to the test environment and personnel health. The replaceable filter core sleeve ensures the continued high efficiency of gas treatment.

[0017] 3. The extrusion mechanism of this utility model uses components such as a hydraulic cylinder, coupling, connecting rod, and pressure head to achieve precise control and adjustment of the battery extrusion process. By adjusting the nut and threaded column, the position of the pressure head and the extrusion force can be easily adjusted to ensure the accuracy and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a lithium battery extrusion test tool provided in an embodiment of the present application;

[0020] Figure 2 A schematic cross-sectional view of a portion of a lithium battery extrusion test tool provided in an embodiment of the present application;

[0021] Figure 3Schematic diagram of the connection structure of the base, triangle iron and top plate provided in the embodiment of this application;

[0022] Figure 4 A schematic diagram of the identification structure of part of the extrusion mechanism provided in the embodiment of this application;

[0023] Figure 5 A schematic diagram of the connection structure between the battery and the carrying box provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the protective door structure provided in an embodiment of the present application.

[0025] In the figure: 1-base; 2-triangle iron; 3-top plate; 4-protective mechanism; 5-mounting plate; 6-air guide tube; 7-squeezing mechanism; 8-protective door; 9-auxiliary strip; 10-carrying box; 11-battery; 41-inner steel plate; 42-outer steel plate; 43-filling material; 61-filter element sleeve; 71-hydraulic cylinder; 72-through hole; 73-guide hole; 74-coupling; 75-connecting rod; 76-pressure head; 77-threaded column; 78-adjusting nut; 81-steel door; 82-first layer of explosion-proof glass; 83-second layer of explosion-proof glass; 84-fiber layer. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0027] Example:

[0028] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 A lithium battery extrusion test tool includes a base 1 and triangle irons 2 integrally formed at the four corners of the base 1 surface, the tops of the four triangle irons 2 are integrally formed with the four corners of the bottom of the top plate 3; two auxiliary strips 9 are provided on the surface of the base 1 and the bottom of the inner steel plate 41; a carrying box 10 is provided on the surface of the base 1; and a battery 11 is placed on the carrying box 10.

[0029] The base 1, triangles 2, and top plate 3 are all integrally formed, forming a sturdy and durable frame that serves as the support structure for the entire test tool. This design ensures that the test tool remains stable and is not susceptible to deformation or damage during the rigorous testing process. The four triangles 2 not only support the top plate 3 but also enhance the stability and load-bearing capacity of the entire structure through their unique design. The top plate 3 provides an ideal mounting platform for installing the extrusion mechanism 7 and other necessary test equipment, ensuring the smooth progress of the test.

[0030] The primary function of auxiliary bar 9 is to provide additional support, ensuring the stable positioning of the carrier box 10 placed on the base 1. During the squeeze test, the carrier box 10 must withstand the tremendous pressure from the squeeze mechanism 7. The auxiliary bar 9 effectively prevents the carrier box 10 from sliding or shifting under pressure, thereby ensuring the accuracy and reliability of the test results.

[0031] The bottom of the carrying box 10 is smoothly connected to the base 1 and the surfaces of the two auxiliary bars 9. This design allows the tester to easily pull out or push back the carrying box 10 when needed, conveniently placing or removing the battery 11. The design of the carrying box 10 also takes into account the need for easy cleaning. Its surface is generally made of a smooth and stain-resistant material, making it easy for testers to clean and maintain it after the test.

[0032] Before the test begins, the tester places the battery 11 to be tested in the carrier box 10. The placement of the battery 11 should ensure that it is aligned with the bottom end of the pressing head 76 so that it can be subjected to uniform squeezing force during the squeezing test.

[0033] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 , a lithium battery extrusion test tool, the outer wall of the triangle iron 2 is seamlessly welded with a protective mechanism 4, the surface of the top plate 3 is equipped with a mounting plate 5, and is provided with an air guide tube 6, the mounting plate 5 is bolted with an extrusion mechanism 7, the moving end of the extrusion mechanism 7 is placed on the surface of the base 1, and the outer wall of the protective mechanism 4 is hinged with a protective door 8; the protective mechanism 4 includes an inner steel plate 41, an outer steel plate 42 and a filler 43; the bottom end of the air guide tube 6 is integrally formed with a corner of the surface of the top plate 3 and is connected to the inside of the inner steel plate 41, the top of the air guide tube 6 has an external thread and is threadedly connected to a filter core sleeve 61; the extrusion mechanism 7 includes a hydraulic cylinder 71, a through hole 72, two guide holes 73, a coupling 74, a connecting rod 75, a pressure head 76, two threaded columns 77 and an adjusting nut 78; the protective door 8 includes a steel door 81, a first layer of explosion-proof glass 82, a second layer of explosion-proof glass 83 and a fiber layer 84.

[0034] Among them, the protective mechanism 4, as an important component of the test tool, not only provides the necessary safety protection but also enhances the stability and load-bearing capacity of the entire structure. The inner steel plate 41 is the inner structure of the protective mechanism 4, and its outer wall is integrally formed with the inner walls of the four triangles 2, the base 1, and the top plate 3. This design ensures that the inner steel plate 41 is tightly connected to the main structure of the test tool, forming a sturdy internal support frame. The outer steel plate 42 is the outer structure of the protective mechanism 4, and its inner wall is integrally formed with the outer walls of the four triangles 2, the base 1, and the top plate 3. The outer steel plate 42 not only provides an additional layer of protection but also enhances the appearance and durability of the entire test tool. Filler 43 is placed between the inner and outer steel plates 41, 42, and the four triangles 2. Filler 43 is typically made of materials with high strength, high toughness, and good sound and heat insulation properties. These materials not only further enhance the stability and load-bearing capacity of the test tool but also effectively isolate the noise and heat generated during the test. During the extrusion test, even if the battery 11 ruptures or produces flying fragments, the protection mechanism 4 can effectively block these dangerous substances and protect the safety of the test personnel.

[0035] The mounting plate 5 is provided on the surface of the top plate 3 for mounting the hydraulic cylinder 71 , so as to facilitate the installation and removal of the hydraulic cylinder 71 .

[0036] The air duct 6 not only serves as a channel for gas discharge but also, through its unique design and integration with the filter cartridge 61, effectively filters and discharges gases generated during the test. The bottom end of the air duct 6 is integrally formed with a corner of the top plate 3, ensuring a tight connection to the main structure of the test tool. This design not only improves the stability and durability of the air duct 6 but also simplifies installation and removal. The bottom end of the air duct 6 connects to the interior of the inner steel plate 41, allowing gases generated during the test to be discharged smoothly through the air duct 6. This design ensures smooth gas flow within the test tool and avoids safety hazards caused by gas accumulation. The inner top of the air duct 6 features external threads, facilitating its connection to the filter cartridge 61. Through this threaded connection, the filter cartridge 61 can be securely fastened to the top of the air duct 6, ensuring effective filtration of gases as they pass through. The easily replaceable filter cartridge 61 simplifies and facilitates maintenance of the test tool. Experimenters can regularly inspect and replace the filter cartridge 61 to ensure consistent filtering performance.

[0037] Among them, the extrusion mechanism 7 is the core component of the test tool, responsible for providing stable extrusion force and ensuring that the pressure head 76 can act on the battery 11 accurately and smoothly. The hydraulic cylinder 71 is the power source of the extrusion mechanism 7. Its fixed end is connected to the surface of the mounting plate 5 by bolts, ensuring the stability and reliability of the hydraulic cylinder 71. The telescopic end of the hydraulic cylinder 71 is locked and connected to the top end of the coupling 74 through the inside of the through hole 72, realizing the transmission of power. The through hole 72 is located on the surface of the top plate 3 to accommodate the telescopic end of the hydraulic cylinder 71 and allow it to move freely. The guide hole 73 is used to guide the up and down movement of the threaded column 77, ensuring the stability and accuracy of the pressure head 76 during the extrusion process. The coupling 74 is a component that connects the telescopic end of the hydraulic cylinder 71 and the connecting rod 75, ensuring the smooth transmission of power. The top of the connecting rod 75 is locked and connected to the bottom inside the coupling 74, and the bottom end is integrally formed with the surface of the pressure head 76, forming a sturdy extrusion transmission system. The pressure head 76 is the direct acting component of the extrusion mechanism 7, and its shape and size are designed according to the characteristics of the battery 11 and the test requirements. The surface of the pressure head 76 is specially treated to ensure that no additional damage is caused to the battery 11 during the extrusion process. The bottom end of the threaded column 77 and the two ends of the surface of the pressure head 76 are integrally formed, and its outer wall fits with the inner wall of the guide hole 73, ensuring the stability and accuracy of the pressure head 76 during the up and down movement. The inner ring of the adjusting nut 78 is threadedly connected to the outer wall of the threaded column 77, and the bottom fits with the surface of the top plate 3. By adjusting the position of the adjusting nut 78, the initial position of the pressure head 76 can be fine-tuned to meet different test requirements.

[0038] As a key safety component of the test tool, the design and construction of protective door 8 are crucial to ensuring the safety and reliability of the testing process. Steel door 81, the main structure of protective door 8, is made of high-strength steel and offers excellent impact and pressure resistance. One side of steel door 81 is hinged to one side of outer steel plate 42, while the other side is locked to the other side of outer steel plate 42 via a lock. This design allows for convenient opening and closing of protective door 8 while ensuring its stability and safety when closed. To protect test personnel from potential explosions or flying debris during testing, a window is provided on the surface of steel door 81, with a first layer of explosion-proof glass 82 and a second layer of explosion-proof glass 83 embedded within the window. Both layers of explosion-proof glass are made of special materials and offer excellent explosion and splash resistance. Even if the battery 11 explodes or produces flying debris during testing, these two layers of explosion-proof glass can effectively block these dangerous substances and protect test personnel. A fiber layer 84 is also placed between the two layers of explosion-proof glass. The fiber layer 84 is made of a high-strength, high-toughness fiber material with excellent sound insulation, heat insulation, and fire resistance. This design not only further enhances the safety performance of the protective door 8, but also improves its sound insulation and heat insulation effects, providing a safer and more comfortable working environment for test personnel.

[0039] The working principle of the lithium battery extrusion test tool is as follows: when squeezing the battery 11, first open the steel door 81 and place the battery 11 on the carrier box 10, then reset the carrier box 10 and align it vertically with the pressure head 76. The design of the threaded column 77 and the adjusting nut 78 allows fine-tuning of the initial position and extrusion force of the pressure head 76 to meet different test requirements. When the hydraulic cylinder 71 is started again and the telescopic end is extended, the pressure head 76 will apply extrusion force to the battery 11 through the transmission of the coupling 74 and the connecting rod 75. During the extrusion process, the external device will record the deformation of the battery 11 in real time, including shape changes, size changes, etc.

[0040] It should be noted that the specific models and specifications of the filter core sleeve 61, hydraulic cylinder 71, and coupling 74 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0041] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A lithium battery extrusion test tool, comprising a base (1) and triangular irons (2) integrally formed at the four corners of the base (1), wherein the top ends of the four triangular irons (2) are integrally formed with the four corners of the bottom of a top plate (3), and characterized in that: The outer wall of the triangle iron (2) is seamlessly welded with a protective mechanism (4); the surface of the top plate (3) is provided with a mounting plate (5) and an air guide tube (6); an extrusion mechanism (7) is bolted to the mounting plate (5); the movable end of the extrusion mechanism (7) is placed on the surface of the base (1); and a protective door (8) is hinged to the outer wall of the protective mechanism (4).

2. A lithium battery extrusion test tool according to claim 1, characterized in that: The protective mechanism (4) comprises an inner steel plate (41), an outer steel plate (42) and a filler (43); the outer wall of the inner steel plate (41) is integrally formed with the four triangles (2), the base (1) and the inner wall of the top plate (3); the inner wall of the outer steel plate (42) is integrally formed with the four triangles (2), the base (1) and the outer wall of the top plate (3); and the filler (43) is placed between the inner steel plate (41), the outer steel plate (42) and the four triangles (2).

3. A lithium battery extrusion test tool according to claim 2, characterized in that: The bottom end of the air guide tube (6) is integrally formed with a corner of the surface of the top plate (3) and is connected to the interior of the inner steel plate (41). The top of the air guide tube (6) has an external thread and is threadedly connected to a filter core sleeve (61).

4. A lithium battery extrusion test tool according to claim 3, characterized in that: The extrusion mechanism (7) includes a hydraulic cylinder (71), a through hole (72), two guide holes (73), a coupling (74), a connecting rod (75), a pressure head (76), two threaded columns (77) and an adjusting nut (78). The fixed end of the hydraulic cylinder (71) is bolted to the surface of the mounting plate (5), and the telescopic end is locked and connected to the top end of the coupling (74) through the inside of the through hole (72). The surface of the top plate (3) is respectively provided with the through hole (72) and the two guide holes (73). The guide hole (73) is provided, the top end of the connecting rod (75) is locked and connected to the bottom inner portion of the coupling (74), and the bottom end is integrally formed with the surface of the pressure head (76), the bottom ends of the two threaded columns (77) are respectively integrally formed with the two ends of the surface of the pressure head (76), and the outer walls are respectively fitted with the inner walls of the two guide holes (73), the inner rings of the two adjusting nuts (78) are respectively threadedly connected to the outer walls of the two threaded columns (77), and the bottoms are fitted with the surface of the top plate (3).

5. A lithium battery extrusion test tool according to claim 4, characterized in that: The protective door (8) comprises a steel door (81), a first layer of explosion-proof glass (82), a second layer of explosion-proof glass (83) and a fiber layer (84). One side of the steel door (81) is hinged to one side of the outer steel plate (42), and the other side is locked to the other side of the outer steel plate (42). A window is provided on the surface. The first layer of explosion-proof glass (82), the second layer of explosion-proof glass (83) and the fiber layer (84) are integrally formed, and the side wall is embedded in the window.

6. A lithium battery extrusion test tool according to claim 5, characterized in that: Two auxiliary strips (9) are provided on the surface of the base (1) and the inner bottom of the inner steel plate (41).

7. A lithium battery extrusion test tool according to claim 6, characterized in that: A carrying box (10) is provided on the surface of the base (1), and the bottom of the carrying box (10) is slidably connected to the surface of the base (1) and the two auxiliary strips (9).

8. A lithium battery extrusion test tool according to claim 7, characterized in that: A battery (11) is placed on the carrying box (10), and the battery (11) is squeezed by the bottom end of the pressing head (76).

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