Compression resistance detection device based on lithium battery production

Abstract

The invention provides a compressive property detection device based on lithium battery production, and belongs to the technical field of lithium battery production, the compressive property detection device comprises a detection table top, and the top of the detection table top is provided with a detection assembly used for detecting the compressive property of a lithium battery. The detection assembly comprises three limiting plates and a detection piece which are slidably connected to the top of the detection table top and are symmetrically arranged in pairs, the bottoms of the three limiting plates and the bottom of the detection piece are fixedly connected with connecting bases, and the bottom of the detection table top is provided with a driving assembly used for driving the detection assembly; through the arrangement of the detection assembly, the compressive property detection device based on lithium battery production can simulate the situation that the lithium battery is suddenly subjected to four-side pressure in the state that the lithium battery is horizontally placed, so that the compressive property of the lithium battery is evaluated more comprehensively, and the design not only improves the accuracy and reliability of detection, but also improves the detection efficiency. And more powerful support is provided for production and quality control of the lithium battery.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a compression performance detection device based on lithium battery production. Background Art

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. It can also refer to a battery containing lithium (including metallic lithium, lithium alloy, lithium ion, and lithium polymer) in the electrochemical system. The working principle of a lithium battery is based on redox reactions, specifically involving the movement of lithium ions between the positive and negative electrodes. Under normal charge and discharge conditions, the entry and exit of lithium ions generally only causes changes in the interlayer spacing, and does not cause damage to the crystal structure. Therefore, from the perspective of charge and discharge reactions, lithium-ion batteries are an ideal reversible battery. During charge and discharge, lithium ions go back and forth between the positive and negative electrodes of the battery, rocking back and forth between the positive and negative electrodes like a rocking chair, so some people figuratively call lithium-ion batteries rocking chair batteries. In the process of lithium battery production, it is usually necessary to perform pressure resistance testing on the surface of the lithium battery to test the pressure resistance of the lithium battery.

[0003] However, the existing method for testing the compression resistance of lithium batteries is usually to fix the lithium battery on a plane and then apply pressure to it through hydraulic equipment. This testing method can only simulate the pressure perpendicular to the surface of the lithium battery. In actual applications, the lithium battery may be subjected to pressure from different directions. Before the lithium battery is subjected to pressure, it may not be in a limited state. Therefore, the present invention provides a compression performance testing device based on lithium battery production to meet the needs. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A compressive performance testing device based on lithium battery production includes a testing table, a testing component for testing the compressive performance of the lithium battery is provided on the top of the testing table, the testing component includes three limit plates and a testing piece slidably connected to the top of the testing table and symmetrically arranged in pairs, and the bottoms of the three limit plates and the testing piece are fixedly connected with a connecting seat, and a driving component for driving the detection component is provided at the bottom of the testing table.

[0005] Optionally, the driving assembly includes a chassis fixedly connected to the bottom center of the detection table, the interior of the chassis is fixedly connected to a driving motor, the output shaft of the driving motor is fixedly connected to a screw, the external thread of the screw is connected to a transmission block, the two opposite sides of the transmission block are rotatably connected to a No. 1 connecting rod, the other ends of the two No. 1 connecting rods are respectively rotatably connected to the connecting seats at the bottom of the two limit plates, the surfaces of the other two opposite sides of the transmission block are rotatably connected to adjusting rods, the other ends of the two adjusting rods are respectively rotatably connected to another limit plate and a connecting seat at the bottom of a detection member. Optionally, the limiting plate includes a fitting portion fitted with the surface of the lithium battery, and a supporting triangle portion is provided on the other side of the limiting plate.

[0006] Optionally, the detection member includes a connecting frame fixedly connected to the top of the connecting seat, a detection plate is fixedly connected to the connecting frame on one side facing the limit plate, a plurality of equally distributed mounting holes are provided inside the detection plate, guide members are provided on both sides of the connecting frame, sliding rods are slidably connected to the opposite surfaces of the two guide members, a sliding block is slidably connected to the surface of the sliding rod, a "I"-shaped connecting rod is rotatably connected to the side of the sliding block facing the detection plate, and a fixed seat is provided at the end of the connecting rod.

[0007] Optionally, a docking sleeve is clamped inside the mounting hole, a detection portion is provided on the outward side of the docking sleeve, an inner cavity is opened inside the detection portion, a center rod is fixedly connected at the center of the inner cavity, and a plurality of connecting cavities connected to the inner cavity are opened at the outer circle of the detection portion.

[0008] Optionally, a plurality of circularly distributed docking spring pieces are provided on a surface of the fixing seat facing the docking sleeve, a docking protrusion is provided on the surface of the docking spring piece, a deformation cavity is provided inside the docking spring piece, a docking cavity is provided inside the docking sleeve, a docking groove matching the docking protrusion is provided on the inner wall of the docking cavity, a center column is fixedly connected to the center of one side of the fixing seat facing the docking sleeve, an arc-shaped reset piece is fixedly connected between the surface of the center column and one side of the end of each docking spring piece, and the fixing seat is used to lock the docking sleeve inside the mounting hole.

[0009] Optionally, the adjusting rod includes a No. 1 connecting part rotatably connected to the outside of the transmission block and a No. 2 connecting part rotatably connected to the bottom of the connecting seat, and the No. 2 connecting part is slidably connected to the inside of the No. 1 connecting part.

[0010] Optionally, a connecting groove adapted to the surface of the No. 2 connecting part is provided inside the No. 1 connecting part facing the No. 2 connecting part, and a plurality of adjustment holes arranged equidistantly are provided on the outer walls on both sides of the No. 1 connecting part. The No. 2 connecting part has connecting guide rails adapted to both sides of the inner cavity of the connecting groove on both sides on both sides of the No. 2 connecting part, and a sliding part is slidably connected inside the No. 2 connecting part.

[0011] Optionally, the top of the No. 2 connecting part facing one end of the No. 1 connecting part and the top are both slidably connected with a limiting column, one end of the limiting column passes through the No. 2 connecting part and extends to the interior of the adjustment hole, and the sliding part is rotatably connected to one surface of the sliding part facing the limiting column with two No. 2 connecting rods distributed in an "eight" shape, and the other ends of the two No. 2 connecting rods are respectively rotatably connected to the opposite surfaces of the two sliding parts, and the other end of the sliding part is rotatably connected to the interior of the No. 2 connecting part through a reset spring, and the surface of the bottom of the No. 2 connecting part is slidably connected with a push plate, and the top end of the push plate is fixedly connected to the bottom of the sliding part.

[0012] Optionally, the surface of the detection table is rotatably connected to a plurality of guide balls, the surface of the detection table is provided with a plurality of guide columns, the three limit plates and both sides of a detection member are slidably connected to the surfaces of the guide columns through connecting plates, and guide wheels are provided at the bottom of the connecting plates on both sides of the detection member.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a detection component, the ball design not only reduces friction and ensures the stability of the lithium battery during the detection process, but also the detection component can easily simulate the four-sided pressure scenarios that the lithium battery may suddenly be subjected to in the real environment. This comprehensive and in-depth simulation can more realistically reflect the deformation of the lithium battery under pressure, its compressive resistance and possible safety hazards, thereby helping manufacturers and quality control personnel to more comprehensively evaluate the compressive resistance of the lithium battery.

[0014] In the above scheme, a detection part is set up and equipped with a fixing seat and a docking sleeve, which can simulate the stress condition of the lithium battery surface under the action of single-point pressure. The flexible layout of the mounting holes provides great convenience for the test. The staff can freely choose any position on the surface of the lithium battery for detection according to actual test needs, and can adjust the position of the stress point according to different test scenarios and conditions to obtain more comprehensive and accurate test results. This design not only improves the detection range of the device, but also makes the test process more flexible and diversified.

[0015] In the above scheme, by setting an adjustment rod, the staff can easily adjust the position of the detection part and the corresponding limit plate according to the actual size of the lithium battery before use. This design enables the device to easily adapt to various types of lithium batteries. Whether it is a small or large lithium battery, it can be accurately detected in this device, which not only improves the practical value of the device, but also greatly reduces the use cost and time cost of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a compression performance testing device based on lithium battery production; Figure 2 It is a schematic diagram of the coordinated three-dimensional structure of the drive assembly; Figure 3 It is a schematic diagram of the coordinated three-dimensional structure of the detection device; Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed seat; Figure 5 It is a schematic diagram of the coordinated three-dimensional structure of the adjusting rod; Figure 6 Schematic diagram of the coordinated three-dimensional structure of the limiting plate; Figure 7 It is a schematic diagram of the three-dimensional structure of the detection parts.

[0018] [Reference Signs] 1. Detection table; 101. Guide ball; 2. Limiting plate; 201. Fitting part; 202. Triangular part; 3. Detection member; 301. Connecting frame; 302. Detection plate; 3021. Mounting hole; 3022. Guide wheel; 303. Guide member; 304. Sliding rod; 305. Sliding block; 306. Connecting rod; 307. Fixed seat; 3071. Docking spring; 3072. Docking protrusion; 3073. Deformation cavity; 3074. Center column; 3075. Reset member; 308. Docking sleeve; 3081 , docking cavity; 3082, docking groove; 309, detection part; 3091, center rod; 3092, inner cavity; 3093, connecting cavity; 4, chassis; 5, screw rod; 6, transmission block; 7, connecting rod No. 1; 8, adjusting rod; 801, connecting part No. 1; 8011, connecting groove; 8012, adjusting hole; 802, connecting part No. 2; 8021, connecting guide rail; 8022, sliding part; 8023, limiting column; 8024, connecting rod No. 2; 8025, pushing plate; 8026, reset spring; 9, connecting seat.

[0019] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0020] The following is a detailed description of a compressive performance detection device based on lithium battery production provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0021] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0022] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0023] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0024] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0025] like Figures 1 to 7As shown, an embodiment of the present invention provides a compressive performance testing device based on lithium battery production, including a testing table 1, a testing component for testing the compressive performance of the lithium battery is provided on the top of the testing table 1, the testing component includes three limit plates 2 and a testing piece 3 that are symmetrically arranged in pairs and slidably connected to the top of the testing table 1, and the bottoms of the three limit plates 2 and the one testing piece 3 are fixedly connected to a connecting seat 9, the surface of the testing table 1 is rotatably connected to a plurality of guide balls 101, the surface of the testing table 1 is provided with a plurality of guide columns, both sides of the three limit plates 2 and the one testing piece 3 are slidably connected to the surface of the guide columns through connecting plates, the bottoms of the connecting plates on both sides of the testing piece 3 are provided with guide wheels 3022, and the bottom of the testing table 1 is provided with a driving component for driving the detection component, the driving component includes a fixed connecting A chassis 4 is connected to the bottom center of the detection table 1, and a driving motor is fixedly connected inside the chassis 4. A screw 5 is fixedly connected to the output shaft of the driving motor. A transmission block 6 is threadedly connected to the external thread of the screw 5. A No. 1 connecting rod 7 is rotatably connected to the opposite sides of the transmission block 6. The other ends of the two No. 1 connecting rods 7 are rotatably connected to the connecting seats 9 at the bottom of the two limit plates 2 respectively. The surfaces of the other two opposite sides of the transmission block 6 are rotatably connected to adjusting rods 8. The other ends of the two adjusting rods 8 are rotatably connected to the connecting seats 9 at the bottom of another limit plate 2 and a detection member 3 respectively. When it is necessary to detect the lithium battery, after adjusting the adaptation size of the device, the lithium battery is directly placed on the top of the detection table 1. After starting the driving motor, the output shaft of the motor starts to rotate, driving the screw 5 fixedly connected to it to rotate synchronously. Since the screw rod 5 and the transmission block 6 are connected by threads, when the screw rod 5 rotates, the transmission block 6 will move in the axial direction of the screw rod 5. As the transmission block 6 moves, its two sides are respectively connected to the connection seats 9 at the bottom of the two limit plates 2 through the No. 1 connecting rod 7, so the movement of the transmission block 6 will be converted into the movement of the limit plates 2 towards or away from each other. At the same time, the other two sides of the transmission block 6 are also connected to the connection seats 9 at the bottom of another limit plate 2 and a detection member 3 through the adjustment rod 8. Since the design of the adjusting rod 8 allows its length to be adjusted within a certain range, even if the size of the lithium battery changes, the adjusting rod 8 can be adjusted to ensure that the detection member 3 and all the limit plates 2 can fit tightly around the lithium battery. Driven by the driving motor, the transmission block 6 continues to move until all the limit plates 2 and the detection member 3 are tightly fitted around the lithium battery and pressure is applied to the lithium battery. At this time, since the force applied on all sides is the same, the deformation or pressure distribution of the lithium battery under pressure can be monitored in real time through the detection member 3 (internal pressure sensor), so as to evaluate its compressive resistance. After the detection is completed, the driving motor reverses and drives the screw 5 to rotate in the opposite direction, so that the transmission block 6, the No. 1 connecting rod 7 and the adjusting rod 8 and other components are restored to their initial positions to prepare for the next detection.

[0026] It should be noted that in the above solution, the pressure sensor is an existing public technology, so it is not described in detail.

[0027] In this embodiment, the limiting plate 2 includes a fitting portion 201 that fits the surface of the lithium battery, and a supporting triangle portion 202 is provided on the other side of the limiting plate 2. The detection member 3 includes a connecting frame 301 fixedly connected to the top of the connecting seat 9, and a detection plate 302 is fixedly connected to the side of the connecting frame 301 facing the limiting plate 2. A plurality of mounting holes 3021 distributed equidistantly are provided inside the detection plate 302. Guide members 303 are provided on both sides of the connecting frame 301, and sliding rods 304 are slidably connected to the opposite surfaces of the two guide members 303. A sliding block 305 is slidably connected to the surface of the sliding rod 304, and the sliding block A connecting rod 306 in the shape of an I is rotatably connected to the surface of the detection plate 302, a fixing seat 307 is provided at the end of the connecting rod 306, a docking sleeve 308 is clamped inside the mounting hole 3021, a detection portion 309 is provided on the outward surface of the docking sleeve 308, an inner cavity 3092 is provided inside the detection portion 309, a center rod 3091 is fixedly connected at the center of the inner cavity 3092, a plurality of connecting cavities 3093 communicating with the inner cavity 3092 are provided at the outer circle of the detection portion 309, a plurality of circularly distributed docking springs are provided on the surface of the fixing seat 307 facing the docking sleeve 308 The surface of the docking spring piece 3071 is provided with a docking protrusion 3072, the interior of the docking spring piece 3071 is provided with a deformation cavity 3073, the interior of the docking sleeve 308 is provided with a docking cavity 3081, and the inner wall of the docking cavity 3081 is provided with a docking groove 3082 adapted to the docking protrusion 3072. The fixing seat 307 is fixedly connected with a center column 3074 at the center of one side of the docking sleeve 308, and an arc-shaped reset piece 3075 is fixedly connected between the surface of the center column 3074 and one side of the end of each docking spring piece 3071. The fixing seat 307 is used to lock the docking sleeve 308 The connecting rod 306 is fixed inside the mounting hole 3021. When the overall compression test is completed and a single-point compression test of a certain surface is required, the connecting sleeve 308 carrying the detection unit 309 can be inserted into the corresponding mounting hole 3021, and then the sliding rod 304 and the sliding block 305 are slid to move the connecting rod 306 and the fixing seat 307 to the back of the connecting sleeve 308. When the sliding block 305 drives the connecting rod 306 and the fixing seat 307 at the end thereof to move to the back of the connecting sleeve 308, the center column 3074 on the fixing seat 307 first attempts to align with the center position inside the connecting sleeve 308. At this time, since the connecting cavity 3081 opened inside the connecting sleeve 308 is designed with a connecting groove 3082 adapted to the connecting protrusion 3072, the connecting spring piece 3071 on the fixing seat 307 will be elastically deformed when subjected to pressure, so that the connecting protrusion 3072 can smoothly slide into the connecting groove 3082.This process is accompanied by the compression of the reset member 3075, which provides a restoring force for the subsequent locking. Once the docking protrusion 3072 completely enters the docking groove 3082, the reset member 3075 begins to release its stored energy, pushing the docking spring 3071 and the docking protrusion 3072 thereon to close to the wall of the docking groove 3082, thereby achieving a firm lock between the fixed seat 307 and the docking sleeve 308. This locking mechanism ensures that when performing a single-point compression test, the detection unit 309 can be stably installed in the required position to avoid displacement or falling off during the test. Next, the central rod 3091 inside the detection unit 309 and the multiple connecting cavities 3093 surrounding it can cooperate with an external pressure sensor to perform a single-point compression test. During the test, the external device is connected to the inner cavity 3092 through the connecting cavity 3093 to transmit the pressure to the surface of the lithium battery. The center rod 3091 is designed to ensure the uniformity of pressure distribution or as a reference point during the test. Due to the combined design of the detection part 309 and the docking sleeve 308, the single-point compression test can be flexibly performed at different positions of the lithium battery without the need for complex adjustments to the entire detection device. After the test is completed, the fixing seat 307 can be easily pulled out of the docking sleeve 308 by reversing the sliding rod 304 and the sliding block 305, and then replaced to other mounting holes 3021 for the next round of testing. This design not only improves the flexibility and accuracy of the test, but also greatly simplifies the operation process, making the single-point compression test more efficient and convenient. At the same time, since all components are reusable and are designed with reasonable reset and locking mechanisms, the detection device has a long service life and low maintenance costs.

[0028] Among them, the adjusting rod 8 includes a No. 1 connecting part 801 rotatably connected to the outside of the transmission block 6 and a No. 2 connecting part 802 rotatably connected to the bottom of the connecting seat 9, the No. 2 connecting part 802 is slidably connected to the inside of the No. 1 connecting part 801, and the No. 1 connecting part 801 is provided with a connecting groove 8011 adapted to the surface of the No. 2 connecting part 802 on the inner side facing the No. 2 connecting part 802, and the outer walls on both sides of the No. 1 connecting part 801 are provided with a plurality of adjusting holes 8012 arranged equidistantly, and the No. 2 connecting part 802 and the No. 2 connecting part 802 are provided with adjusting holes 8012 adapted to the inner sides of the connecting groove 8011. The second connecting part 802 is slidably connected to the sliding member 8022 inside, the top of the second connecting part 802 facing one end of the first connecting part 801 and the top are both slidably connected to the limiting column 8023, one end of the limiting column 8023 passes through the second connecting part 802 and extends to the inside of the adjustment hole 8012, and the sliding member 8022 is rotatably connected to one side of the limiting column 8023 with two "eight"-shaped connecting rods 8024, and the other ends of the two No. 2 connecting rods 8024 are respectively rotatably connected to the opposite surfaces of the two sliding members 8022, and the sliding member 8022 is rotatably connected to the opposite surfaces of the two sliding members 8022. The other end of the member 8022 is rotatably connected to the interior of the second connecting part 802 through a return spring 8026. The surface of the bottom of the second connecting part 802 is slidably connected with a push plate 8025. The top of the push plate 8025 is fixedly connected to the bottom of the sliding member 8022. Before the adjustment starts, the adjustment rod 8 is in a locked state. At this time, the driving motor in the driving assembly is started to rotate the screw rod 5, and the transmission block 6 starts to move downward. The movement of the transmission block 6 drives the three limit plates 2 and a detection member 3 to move from the surroundings of the lithium battery to the lithium battery through the adjustment rod 8 and the first connecting rod 7. When the two longitudinal limit plates 2 fit against the surface of the lithium battery, the transverse detection piece 3 and the other limit plate 2 may fit or not fit depending on the size of the lithium battery. When a misfit occurs, the push plate 8025 at the bottom of the adjustment rod 8 can be pushed forward so that the push plate 8025 drives the sliding piece 8022 to move to one side. When the sliding piece 8022 moves to one side, since it is rotatably connected to the second connecting rod 8024, and the other end of the second connecting rod 8024 is also rotatably connected to the opposite surface of the other sliding piece 8022, a lever-like structure is formed. This structure ensures that when the sliding member 8022 moves, the No. 2 connecting rod 8024 will push or pull the limiting column 8023 connected to it, so that the limiting column 8023 is pulled out from the currently inserted adjustment hole 8012 and moved to the position of the adjacent adjustment hole 8012. Since the No. 2 connecting part 802 is slidably connected to the connecting groove 8011 of the No. 1 connecting part 801 through the connecting guide rail 8021, and the limiting column 8023 originally serves to lock the position of the No. 2 connecting part 802, when the limiting column 8023 is pulled out, the No. 2 connecting part 802 can be fine-tuned inside the No. 1 connecting part 801.At this time, the operator can continue to push the push plate 8025 forward or backward according to the actual size of the lithium battery, and through the linkage of the sliding member 8022, the second connecting rod 8024 and the limiting column 8023, the second connecting part 802 slides to a suitable position relative to the first connecting part 801. In this process, the return spring 8026 plays two roles. One is to provide elastic force for the sliding member 8022 to return to its original position. When the push plate 8025 is no longer subjected to force, the return spring 8026 will automatically Return to the initial position; second, provide thrust for the limit column 8023 to insert into the adjustment hole 8012, ensuring that after the adjustment is completed, the limit column 8023 can firmly lock the position of the second connection part 802. When the second connection part 802 is adjusted to a suitable position, the operator can loosen the push plate 8025, and the reset spring 8026 pushes the sliding member 8022 back, and the second connecting rod 8024 drives the limit column 8023 to be reinserted into the adjacent (or new) adjustment hole 8012, locking the second connection part 802 in the new position. In this way, the adjustment rod 8 completes the adaptive adjustment of the lithium battery size. With the adjustment of the second connection part 802, the limit plate 2 connected to the second connection part 802 will also move to the appropriate position, ensuring that all limit plates 2 and detection parts 3 can fit tightly around the lithium battery, providing accurate positioning and support for subsequent compression performance testing. The entire adjustment process is simple and fast, and due to the use of mechanical linkage and spring reset design, the adjustment is more accurate and reliable. At the same time, through the multiple adjustment holes 8012 arranged at equal intervals, the adjustment rod 8 can achieve wide adaptability to lithium batteries of different sizes, thereby improving the versatility and practicality of the detection device.

[0029] The working principle provided by the present invention is that when it is necessary to test the lithium battery, after adjusting the adaptation size of the device, the lithium battery is directly placed on the top of the detection table 1, and after starting the drive motor, the output shaft of the motor begins to rotate, driving the screw 5 fixedly connected thereto to rotate synchronously. Since the screw 5 and the transmission block 6 are connected by a thread, when the screw 5 rotates, the transmission block 6 will move in the axial direction of the screw 5. As the transmission block 6 moves, its two sides are respectively connected to the connection seat 9 at the bottom of the two limit plates 2 through the No. 1 connecting rod 7, so the movement of the transmission block 6 will be converted into the movement of the limit plates 2 towards or away from each other. At the same time, the other two sides of the transmission block 6 are also connected to the connection seat 9 at the bottom of another limit plate 2 and a detection member 3 through the adjustment rod 8. Since the design of the adjusting rod 8 allows its length to be adjusted within a certain range, even if the size of the lithium battery changes, the adjusting rod 8 can be adjusted to ensure that the detection member 3 and all the limit plates 2 can fit tightly around the lithium battery. Driven by the drive motor, the transmission block 6 continues to move until all the limit plates 2 and the detection member 3 fit tightly around the lithium battery and apply pressure to the lithium battery. At this time, since the force applied on all sides is the same, the deformation or pressure distribution of the lithium battery under pressure can be monitored in real time through the detection member 3 (internal pressure sensor), so as to evaluate its compressive resistance. After the detection is completed, the drive motor is reversed to drive the screw 5 to rotate in the opposite direction. , so that the transmission block 6, the first connecting rod 7 and the adjusting rod 8 and other components are restored to the initial position, and prepare for the next test. After the overall compression test is completed, when it is necessary to measure the single-point compression test of a certain surface, the docking sleeve 308 carrying the detection part 309 can be inserted into the inside of the mounting hole 3021 at the corresponding position, and then the sliding rod 304 and the sliding block 305 are slid, so that the connecting rod 306 and the fixing seat 307 are moved to the back of the docking sleeve 308. When the sliding block 305 drives the connecting rod 306 and the fixing seat 307 at the end thereof to move to the back of the docking sleeve 308, the center column 3074 on the fixing seat 307 first tries to align with the center position inside the docking sleeve 308. At this time, since the docking cavity 3081 opened inside the docking sleeve 308 is designed with a docking groove 3082 adapted to the docking protrusion 3072, the docking spring 3071 on the fixing seat 307 will undergo elastic deformation when subjected to pressure, so that the docking protrusion 3072 can slide smoothly into the docking groove 3082. This process is accompanied by the compression of the reset member 3075, which provides a restoring force for the subsequent locking. Once the docking protrusion 3072 completely enters the docking groove 3082, the reset member 3075 begins to release its stored energy, pushing the docking spring 3071 and the docking protrusion 3072 thereon to cling to the wall of the docking groove 3082, thereby achieving a firm lock between the fixed seat 307 and the docking sleeve 308.This locking mechanism ensures that when performing a single-point compression test, the detection part 309 can be stably installed in the desired position to avoid displacement or falling off during the test. Next, the center rod 3091 inside the detection part 309 and the multiple connecting cavities 3093 surrounding it can cooperate with the external pressure sensor to perform a single-point compression test. During the test, the external device is connected to the inner cavity 3092 through the connecting cavity 3093 to transfer the pressure to the surface of the lithium battery. The center rod 3091 is designed to ensure the uniformity of pressure distribution or as a reference point during the test. Due to the combined design of the detection part 309 and the docking sleeve 308, the single-point compression test can be flexibly performed at different positions of the lithium battery without the need for complex adjustments to the entire detection device. After the test is completed, the fixing seat 307 can be easily pulled out from the docking sleeve 308 by reversely operating the sliding rod 304 and the sliding block 305, and then replaced to the position of other mounting holes 3021 for the next round of testing. This design not only improves the flexibility and accuracy of the test, but also greatly simplifies the operation process, making the single-point compression test more efficient and convenient. At the same time, since all components can be reused and are designed with reasonable reset and locking mechanisms, the detection device has a long service life and low maintenance costs.

[0030] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A compressive performance testing device based on lithium battery production, comprising a testing table (1), characterized in that: The top of the detection table (1) is provided with a detection component for detecting the pressure resistance performance of the lithium battery, the detection component comprising three limit plates (2) and a detection member (3) which are slidably connected to the top of the detection table (1) and are symmetrically arranged in pairs, and the bottoms of the three limit plates (2) and the detection member (3) are fixedly connected to a connecting seat (9), and the bottom of the detection table (1) is provided with a driving component for driving the detection component.

2. The compressive performance detection device based on lithium battery production according to claim 1 is characterized in that: The driving assembly comprises a chassis (4) fixedly connected to the bottom center of the detection table (1), the interior of the chassis (4) being fixedly connected to a driving motor, the output shaft of the driving motor being fixedly connected to a screw rod (5), the external thread of the screw rod (5) being connected to a transmission block (6), the transmission block (6) being rotatably connected to a No. 1 connecting rod (7) on both opposite sides, the other ends of the two No. 1 connecting rods (7) being rotatably connected to connecting seats (9) at the bottoms of two limit plates (2), respectively, the surfaces of the other two opposite sides of the transmission block (6) being rotatably connected to adjusting rods (8), the other ends of the two adjusting rods (8) being rotatably connected to a connecting seat (9) at the bottom of another limit plate (2) and a detection member (3), respectively.

3. The compressive performance detection device based on lithium battery production according to claim 2 is characterized in that: The limiting plate (2) comprises a fitting portion (201) fitted with the surface of the lithium battery, and a supporting triangle portion (202) is provided on the other side of the limiting plate (2).

4. The compressive performance detection device based on lithium battery production according to claim 2 is characterized in that: The detection member (3) comprises a connection frame (301) fixedly connected to the top of the connection seat (9); a detection plate (302) is fixedly connected to the surface of the connection frame (301) facing the limit plate (2); a plurality of mounting holes (3021) distributed at equal intervals are provided inside the detection plate (302); guide members (303) are provided on both sides of the connection frame (301); sliding rods (304) are slidably connected to the opposite surfaces of the two guide members (303); a sliding block (305) is slidably connected to the surface of the sliding rod (304); a "I"-shaped connection rod (306) is rotatably connected to the surface of the sliding block (305) facing the detection plate (302); a fixed seat (307) is provided at the end of the connection rod (306).

5. The compressive performance testing device based on lithium battery production according to claim 4 is characterized in that: A docking sleeve (308) is clamped inside the mounting hole (3021), a detection portion (309) is provided on the outward side of the docking sleeve (308), an inner cavity (3092) is provided inside the detection portion (309), a center rod (3091) is fixedly connected at the center of the inner cavity (3092), and a plurality of connection cavities (3093) connected to the inner cavity (3092) are provided at the outer circle of the detection portion (309).

6. The compressive performance testing device based on lithium battery production according to claim 5, characterized in that: A plurality of circularly distributed docking spring pieces (3071) are provided on one surface of the fixing seat (307) facing the docking sleeve (308); a docking protrusion (3072) is provided on the surface of the docking spring piece (3071); a deformation cavity (3073) is provided inside the docking sleeve (308); a docking cavity (3081) is provided inside the docking sleeve (308); a docking groove (3082) matched with the docking protrusion (3072) is provided on the inner wall of the docking cavity (3081); a center column (3074) is fixedly connected at the center of one surface of the fixing seat (307) facing the docking sleeve (308); an arc-shaped reset piece (3075) is fixedly connected between the surface of the center column (3074) and one side of the end of each docking spring piece (3071); and the fixing seat (307) is used to lock the docking sleeve (308) inside the mounting hole (3021).

7. The compressive performance testing device based on lithium battery production according to claim 2 is characterized in that: The adjusting rod (8) comprises a first connecting portion (801) rotatably connected to the outside of the transmission block (6) and a second connecting portion (802) rotatably connected to the bottom of the connecting seat (9), wherein the second connecting portion (802) is slidably connected to the inside of the first connecting portion (801).

8. The compressive performance testing device based on lithium battery production according to claim 7 is characterized in that: A connecting groove (8011) adapted to the surface of the second connecting part (802) is provided on the inner side of the first connecting part (801) facing the second connecting part (802), and a plurality of adjusting holes (8012) arranged at equal intervals are provided on the outer walls on both sides of the first connecting part (801). The second connecting part (802) has connecting guide rails (8021) adapted to the inner sides of the connecting groove (8011), and a sliding member (8022) is slidably connected to the interior of the second connecting part (802).

9. The compressive performance testing device based on lithium battery production according to claim 8, characterized in that: The top and top of the second connecting part (802) facing one end of the first connecting part (801) are both slidably connected to a limiting column (8023); one end of the limiting column (8023) penetrates the second connecting part (802) and extends to the inside of the adjustment hole (8012); the sliding member (8022) is rotatably connected to two second connecting rods (8024) arranged in an "eight" shape on one surface facing the limiting column (8023); the other ends of the two second connecting rods (8024) are rotatably connected to the opposite surfaces of the two sliding members (8022) respectively; the other end of the sliding member (8022) is rotatably connected to the inside of the second connecting part (802) via a return spring (8026); the surface of the bottom of the second connecting part (802) is slidably connected to a push plate (8025); the top end of the push plate (8025) is fixedly connected to the bottom of the sliding member (8022).

10. The compressive performance testing device based on lithium battery production according to claim 1, characterized in that: The surface of the detection table (1) is rotatably connected to a plurality of guide balls (101), the surface of the detection table (1) is provided with a plurality of guide columns, the three limit plates (2) and two sides of a detection member (3) are slidably connected to the surfaces of the guide columns via connecting plates, and the bottoms of the connecting plates on both sides of the detection member (3) are provided with guide wheels (3022).

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