Lithium ion battery detection equipment

Abstract

The invention discloses lithium ion battery detection equipment, and relates to the technical field of lithium battery detection, and the lithium ion battery detection equipment comprises an equipment machine table, a tester, a carrying mechanism and a detection part; the tester is provided with a plurality of detection parts positioned on the equipment machine table, the plurality of detection parts are positioned in a peripheral working area of the carrying mechanism, each detection part is provided with a detection station for detecting the lithium ion battery, and the tester is used for detecting parameters of the lithium ion battery on the respective detection station through each detection part; each material rack is arranged corresponding to one detection part, and each material rack is provided with a to-be-detected area; and the carrying mechanism carries out carrying action between each detection part and the corresponding material rack, and carries back to the corresponding material rack after detection is finished. The plurality of detection parts are arranged, and the carrying mechanism with the working range covering the plurality of detection parts is used for automatic screening detection, so that the equipment can execute a complete detection process on two batteries in parallel.

Description

Technical Field

[0001] This invention relates to the field of lithium battery testing technology, and in particular to a lithium-ion battery testing device. Background Technology

[0002] Because lithium-ion batteries have highly concentrated energy, internal short circuits, overcharging, over-discharging, or damage can lead to thermal runaway, causing fires or even explosions. Testing can identify fatal defects such as internal micro-short circuits, poor electrode welding, and insulation failure, eliminating safety hazards at the source and protecting consumers' lives and property. Therefore, testing lithium-ion batteries is essential.

[0003] In current technologies, the testing of lithium-ion batteries still relies heavily on manual labor. Manual testing suffers from low efficiency and unstable results due to worker conditions. Although automated testing equipment has emerged, its efficiency remains low, making fully automated testing impossible.

[0004] Therefore, there is an urgent need for a lithium-ion battery testing device that can be fully automated and rapid. Summary of the Invention

[0005] The main objective of this invention is to provide a lithium-ion battery testing device to address the problem of low testing efficiency in existing technologies.

[0006] To achieve the above objectives, the present invention proposes a lithium-ion battery testing device, comprising: a machine base; The conveying mechanism is installed on the machine platform of the equipment; A testing instrument, mounted on the equipment platform, has multiple testing sections located on the equipment platform within the peripheral working area of ​​the conveying mechanism. Each testing section has a testing station for testing lithium-ion batteries. The testing instrument is used to test the parameters of the lithium-ion batteries at their respective testing stations through each testing section. Multiple material racks are provided, each material rack is provided with a corresponding detection unit, and each material rack has a detection area; The conveying mechanism is used to perform conveying actions between each of the testing units and their respective corresponding material racks. Each conveying action includes conveying the lithium-ion battery on the testing area of ​​each material rack to the testing station of the corresponding testing unit; and, after testing, moving it back to the corresponding material rack.

[0007] In one embodiment, each of the material racks includes a conveying mechanism, a loading rack, a good product rack, and a defective product rack respectively disposed on the equipment platform; the area to be inspected is disposed on the conveying mechanism, and the loading rack and the good product rack are disposed at both ends of the conveying mechanism; the conveying mechanism is used to transfer the loading rack, the good product rack, and the tray of the area to be inspected.

[0008] In one embodiment, the detection unit includes a detection mechanism, a first image detection device, a second image detection device, and a battery transfer mechanism, each respectively disposed on the equipment platform; A battery transfer mechanism used to detect the concentricity of lithium-ion batteries; The first image detection device is used to detect the QR code status of the lithium-ion battery; The second image detection device is used to detect the battery placement angle; The testing facility is used to emit detection signals to test lithium-ion batteries and transmit the detection signals to the testing instrument.

[0009] In one embodiment, the conveying mechanism includes multiple fixed legs fixed to the equipment platform, a conveyor line assembly mounted on the multiple fixed legs, a plurality of first synchronous pulleys mounted on the conveyor line assembly, a drive motor mounted at the lower end of the conveyor line assembly, a second synchronous pulley mounted on the drive motor, the first synchronous pulleys being connected to the second synchronous pulleys via a synchronous belt, the area to be inspected being fixed on the conveyor line assembly between the uninspected area and the good product rack, and a movable plate mounted on the conveyor line assembly, the movable plate moving as the drive motor drives the synchronous belt.

[0010] In one embodiment, the area to be inspected includes a fixed guide plate disposed on the conveyor assembly. The fixed guide plate limits the formation of a feeding trough. The lower end of the feeding trough is provided for a moving plate to pass through. A lifting device is provided at the bottom of the feeding trough. First sensor assemblies for detection are also provided on both sides of the fixed guide plate. The first sensors are disposed on the fixed guide plate and are used to detect the loading tray in the feeding trough. A blocking cylinder assembly is also provided on the side of the feeding trough facing the good product rack.

[0011] In one embodiment, the good product rack is formed by multiple limiting rods fixed to one end of the conveying mechanism, and is used to accommodate the stacked trays of tested lithium-ion batteries. The lower end of the good product rack is provided with a first lifting component, and the limiting rods of the good product rack are provided with a check valve component. The limiting rods of the good product rack are fixed to the conveying line component and a notch is provided for the passage of the moving plate. The feeding rack is formed by multiple limiting rods fixed to the other end of the conveying mechanism, and is used to accommodate stacked untested lithium-ion battery trays. A second lifting component is provided at the lower end of the area to be tested. Tray limiting components are provided on both sides of the area to be tested. The limiting rods of the area to be tested and the fixed part of the conveying line assembly are provided with notches for the passage of the moving plate.

[0012] In one embodiment, the conveying mechanism is a robotic arm, which is fixed to the rear side of the middle of the upper surface of the equipment platform. The robotic arm is provided with a connecting shaft, and the connecting shaft is connected to a mechanical gripper for gripping a tray. The end of the mechanical gripper is provided with a suction nozzle for adsorbing lithium-ion batteries.

[0013] In one embodiment, the testing mechanism includes a fixed base fixed to the equipment platform. The fixed base is provided with a first testing component and a second testing component for testing the quality of lithium-ion batteries. The first and second testing components are arranged facing each other. Each of the first and second testing components is provided with a test probe capable of detecting the current signal of the lithium-ion battery. The fixed base is provided with a placement plate, which has multiple placement slots. A rotation positioning component connected to the fixed slots is provided at the lower end of the fixed base for positioning the battery during placement. The placement plate is positioned between the first and second testing components. The first and second testing components are electrically connected to a testing instrument inside the equipment platform to transmit the detection signal to the testing instrument.

[0014] In one embodiment, the transfer mechanism includes multiple second guide pillars fixed to the equipment platform. A support platform is provided at the upper end of the multiple second guide pillars. Multiple positioning clamps for fixing lithium-ion batteries are provided on the support platform. The lower end of the positioning clamps is connected to a drive control component. A second sensor component for detection and sensing is also provided on the side of the support platform corresponding to the positioning clamps.

[0015] In one embodiment, the second image detection device includes multiple third guide pillars higher than the detection mechanism. A first mounting plate is provided at the upper end of the third guide pillars. A second mounting plate capable of linear reciprocating motion is provided on the first mounting plate. A mounting bracket is provided at one end of the second mounting plate. The mounting bracket is U-shaped. An angle detection component is slidably provided at the end of each U-shaped mounting bracket to detect the lithium-ion battery placement angle of the two detection mechanisms of the equipment. A sliding groove is provided at the end of the mounting bracket. The angle detection component is slidably connected to the end of the mounting bracket through a sliding plate and the sliding groove, and is used to adjust the acquisition height of the angle monitoring component.

[0016] The beneficial effects of this invention are: 1. By setting up multiple testing sections, the equipment can automatically screen and test multiple batteries by a transport mechanism whose working range covers multiple testing sections, enabling the equipment to perform a complete testing process on multiple batteries synchronously and in parallel.

[0017] 2. Reduce equipment footprint: The shared handling mechanism for each testing department allows multiple testing departments to be set up on one equipment platform, making the equipment structure more compact, improving the space utilization rate of the production workshop, and reducing the site cost per unit of production capacity.

[0018] 3. Multiple testing departments can operate synchronously or independently in terms of control. When one testing department needs to be suspended due to failure or routine maintenance, the other testing department can continue to work independently, avoiding the production interruption risk of traditional single-line equipment stopping when it stops, and improving the overall availability and production continuity of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 Overall structure of the device provided by the present invention Figure 1 ; Figure 2 Overall structure of the device provided by the present invention Figure 2 ; Figure 3 Schematic diagram of the overall structure of the conveying structure provided by the present invention Figure 1 ; Figure 4 Schematic diagram of the overall structure of the conveying structure provided by the present invention Figure 2 ; Figure 5 Exploded view of the conveying structure provided by the present invention; Figure 6 This is a schematic diagram of the defective product detection area provided by the present invention; Figure 7 This is a view of the detection structure provided by the present invention; Figure 8 This is a first image detection structure view provided by the present invention; Figure 9 This is a schematic diagram of the battery transfer structure provided by the present invention; Figure 10 This is a schematic diagram of the second image detection structure provided by the present invention.

[0021] Explanation of icon numbers: 100. Equipment platform; 200. Handling mechanism; 201. Robotic arm; 202. Connecting shaft; 203. Mechanical gripper; 204. Nozzle; 3000, Material rack; 300, Conveying mechanism; 301, Fixed support leg; 302, Conveyor line assembly; 303, First synchronous pulley; 304, Synchronous belt; 305, Drive motor; 306, Second synchronous pulley; 307, Moving plate; 310, Good product rack; 311, Check valve assembly; 312, First lifting assembly; 313, Limiting plate; 320, Loading rack; 321, Loading tray limiting component; 322, Second lifting assembly; 330, Inspection area; 331, Fixed guide plate; 332, First sensor assembly; 333, Lifting device; 334, Blocking cylinder assembly; 335, Loading chute; 340, Limiting rod; 341, Notch; 400, Defective product rack; 401, Heightening bracket; 402, Fixed plate; 403, First guide pillar; 404, Defective product placement section; 5000, Detection section; 500, Detection mechanism; 501, Fixed base; 502, First test component; 503, Second test component; 504, Rotation positioning component; 505, Placement plate; 506, Placement slot; 600, First image detection device; 700, Battery transfer mechanism; 701, Second guide pillar; 702, Support platform; 703, Positioning fixture; 704, Drive control component; 705, Second sensor component; 800, Second image detection device; 801, Third guide pillar; 802, First mounting plate; 803, Second mounting plate; 804, Mounting bracket; 805, Slide groove; 810, Angle detection component; 811, Sliding plate.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] This invention proposes a lithium-ion battery testing device.

[0027] Please see Figures 1 to 10 In one embodiment of the present invention, the lithium-ion battery testing equipment of the present invention includes: a machine base 100, which serves as the base of the equipment and the start and stop control device; and a conveying mechanism 200, which is disposed on the machine base 100 and is used to convey lithium-ion batteries and a carrying tray. A testing instrument is installed on the equipment platform 100. In this embodiment, it is installed inside the equipment platform 100. The testing instrument has multiple detection units 5000 located on the equipment platform 100. The multiple detection units 5000 are located in the peripheral working area of ​​the conveying mechanism 200. Each detection unit 5000 has a detection station for testing lithium-ion batteries. The testing instrument is used to detect the parameters of the lithium-ion batteries at their respective detection stations through each detection unit 5000. There are also multiple material racks 3000. Each material rack 3000 corresponds to one detection unit 5000 and each material rack 3000 has a testing area 330. In this application, the detection unit 5000 is composed of multiple detection units. The detection station transmits the detection signal to the testing instrument to determine the quality of the lithium-ion battery.

[0028] The conveying mechanism 200 is used to perform conveying actions between each testing unit 5000 and its corresponding material rack 3000. Each conveying action includes conveying the lithium-ion battery on the testing area 330 of each material rack 3000 to the testing station of the corresponding testing unit 5000; and after testing, moving it back to the corresponding material rack 3000.

[0029] See Figure 2 In this application, the equipment 100 is equipped with a tester and an electrical control cabinet, and a control panel is provided at one end; the conveying mechanism 200 is provided on the equipment 100 and installed at one end in the middle of the equipment 100.

[0030] In one embodiment, the equipment platform 100 is provided with two sets of detection units 5000, which are symmetrically arranged on the equipment platform 100. The working range of the conveying mechanism 200 includes the two sets of detection units 5000, and the detection units 5000 can work simultaneously.

[0031] In one embodiment, each material rack 3000 includes a conveying mechanism 300, a loading rack 320, a good product rack 310, and a defective product rack 400 respectively disposed on the equipment base 100; the inspection area 330 is disposed on the conveying mechanism 300, the loading rack 320 and the good product rack 310 are disposed at both ends of the conveying mechanism 300, and the conveying mechanism 300 is used to transfer the loading rack 320, the good product rack 310 and the tray of the inspection area 330.

[0032] When the testing equipment of this application is started, the conveying mechanism 300 first transports the tray in the loading rack 320 to the testing area 330. The handling mechanism 200 then sequentially passes the lithium-ion batteries in the tray through the testing stations of each testing section 5000 for testing. Good products are then returned to the tray in the testing area 330 via the handling mechanism 200, while defective products are placed in the defective product rack 400. After all batteries in the trays in the testing area 330 have been tested, the conveying mechanism 300 transports the tested trays to the good product rack 310 for stacking. During testing, the handling mechanism 200 can simultaneously test the lithium-ion batteries in two sets of testing sections 5000.

[0033] Furthermore, the testing unit 5000 includes a testing mechanism 500, a first image detection device 600, a second image detection device 800, and a battery transfer mechanism 700, all respectively installed on the equipment base 100. During testing, the transport mechanism 200 sequentially passes the lithium-ion batteries in the testing area 330 through the first image detection device 600 to scan the QR code status of the lithium-ion batteries, then places the lithium-ion batteries on the battery transfer mechanism 700 to correct their concentricity, and then transports them to the testing mechanism 500 for testing. This prevents the second image detection device 800 from detecting the battery placement angle while the batteries are in the testing mechanism 500. The testing mechanism 500 detects the current signal of the lithium-ion batteries and transmits the detected current signal to the testing instrument inside the equipment base 100 to obtain the test results. Good products after testing are directly transported back to the testing area 330, while defective products are transported to the defective product rack 400.

[0034] See Figures 3 to 5In one embodiment, the conveying mechanism 300 serves as the main link connecting the loading rack 320 and the good product rack 310. Its main body is securely mounted on the equipment base 100 via multiple fixed support legs 301, ensuring the rigidity and stability of the entire conveying system during operation and preventing vibration. The conveyor line assembly 302 is fixed to the top of the fixed support legs 301, and multiple first synchronous pulleys 303 are spaced apart along the length of the conveyor line assembly 302. A drive motor 305 is mounted on the equipment base 100 below the conveyor line assembly 302, and a second synchronous pulley 306 is mounted on the output shaft of the drive motor 305. A synchronous belt 304 is tightly fitted onto the multiple first synchronous pulleys 303 and second synchronous pulleys 306, thus forming a transmission system. When the drive motor 305 operates, it drives the synchronous belt 304 to move via the second synchronous pulleys 306. A movable plate 307 is provided on the conveyor line assembly 302, and the movable plate 307 is fixedly connected to the synchronous belt 304. When the drive motor 305 is running, the power is transmitted through the synchronous belt 304 and directly converted into the reciprocating motion of the moving plate 307 along the direction of the conveyor assembly 302. The motion path of the moving plate 307 is designed to pass through the lower ends of the loading rack 320 and the good product rack 310 to facilitate the conveying of the pallet.

[0035] Further, see Figures 3 to 5 The loading rack 320 is located at one end of the conveying mechanism 300. It is formed by multiple limiting rods 340 fixed to the conveying mechanism 300, and this space is used to accommodate stacked trays of untested lithium-ion batteries. The limiting rods 340 are provided with notches 341 at the fixed points with the conveying mechanism to facilitate the transport of the moving plate 307. A second lifting component 322 is provided at the lower end of the testing area 330 to lift or lower the trays within its limiting area, so that the moving plate of the conveying device can transport the trays on the conveyor line assembly 302, thereby realizing continuous and automatic feeding.

[0036] On both sides of the loading rack 320, there are also symmetrically arranged tray limiting members 321. These are used to apply a certain constraint force to the stacked trays from the side to prevent the trays from tilting or shaking during lifting or equipment operation, ensuring the stability of the stack and thus ensuring the positional accuracy of the handling mechanism 200 each time it grabs.

[0037] The good product rack 310 is located at the other end of the conveying mechanism 300. It is also formed by multiple limiting rods 340 fixed to the conveying mechanism 300, used to accommodate stacked trays carrying tested and qualified lithium-ion batteries. The limiting rods 340 of the good product rack 310 also have notches 341 at the fixing points with the conveyor assembly 302 to facilitate the transport of the moving plate 307. At the lower end of the good product rack 310, a first lifting assembly 312 is provided, which functions similarly to the second lifting assembly 322, for receiving and stacking the trays layer by layer to achieve orderly and dense storage of good batteries.

[0038] In one embodiment, a check valve assembly 311 is provided on at least one limiting rod 340 of the good product rack 310. Preferably, four limiting rods 340 are provided, forming a rectangular frame. The check valve assembly 311 effectively prevents the stacked trays from sliding out in the reverse direction of insertion due to any accidental reverse force, fundamentally avoiding the risk of disorder or falling of the inspected batteries.

[0039] See Figures 3 to 5 Furthermore, the testing area 330 includes a fixed guide plate 331, which is bolted to the conveyor assembly 302. Its internal contour defines a loading trough 335 that matches the shape of the loading tray, used to support the tray. The lower end of the loading trough 335 allows the aforementioned moving plate 307 to pass freely. A lifting device 333 is also provided at the lower end of the area corresponding to the loading trough 335. When the moving plate 307 moves directly below the loading trough 335 and stops, the lifting device 333 can drive the moving plate 307 to rise, thereby lifting the loading tray in the loading trough 335 for receiving the tray; conversely, it lowers to release the tray.

[0040] To achieve intelligent control, first sensor assemblies 332 are installed on both sides of the fixed guide plate 331. Preferably, these sensors are through-beam photoelectric sensors, precisely aligned with the left and right sides of the feeding trough 335. Their core function is to detect whether the tray has been correctly placed at the preset center position of the feeding trough 335. When the tray is in place, both sensors should be triggered simultaneously or reach a specific signal state. If only one side is triggered, the control system can determine that the tray is misplaced. If incorrect placement is found, the signal is transmitted to the control system within the equipment 100. The control system within the equipment 100 then controls the conveying mechanism 200 to reposition the tray, thereby achieving error prevention detection.

[0041] Furthermore, a blocking cylinder assembly 334 is provided on the side of the loading trough 335 facing the good product rack 310. This assembly includes a cylinder and a stop or baffle driven by it. During transportation, the stop rises as a physical limit to prevent the pallet from sliding out of the loading trough 335 due to inertia, thus ensuring transportation safety.

[0042] See Figure 1 and Figure 8 Furthermore, the handling mechanism 200 is a robotic arm 201, which is fixed to the rear middle of the upper surface of the equipment platform 100. A connecting shaft 202 is provided on the robotic arm 201, and the connecting shaft 202 is connected to a mechanical gripper 203 for gripping a pallet. The end of the mechanical gripper 203 is provided with a suction nozzle 204 for adsorbing lithium-ion batteries. The robotic arm 201 is a multi-joint robotic arm 201, preferably a four-axis or six-axis industrial robot. The base of the robotic arm 201 is fixed to the rear middle of the upper surface of the equipment platform 100. With this installation position, the working radius of the robotic arm 201 can efficiently cover all key workstations, including the two sets of inspection areas 330, the good product rack 310, the defective product rack 400, the battery transfer mechanism 700, and the inspection mechanism 500, thereby realizing full-line material handling, simplifying the layout and saving costs.

[0043] A connecting shaft 202 is provided on the movable joint at the far end of the robotic arm 201. This connecting shaft 202 is used for quick and precise installation of the end effector. In this invention, a customized composite end effector is installed on this connecting shaft 202. The end effector mainly consists of two parts: a mechanical gripper 203 and a suction nozzle 204. The mechanical gripper 203 is fixed to the connecting shaft 202 by a mounting plate. The gripper is preferably a pneumatic or electric parallel gripper, and the inner shape of its two gripping fingers matches the gripping edges on both sides of the tray, for reliably gripping and transferring the entire tray. Multiple suction nozzles 204 are provided, arranged in an array matching the size of the battery, and the suction nozzles 204 are directly disposed at the end of the mechanical gripper 203. The suction nozzles 204 are connected to the pneumatic vacuum system of the device through built-in air passages, using vacuum negative pressure to safely and non-destructively adsorb and grip individual lithium-ion batteries. Preferably, the suction nozzles 204 are made of soft rubber or silicone to prevent scratching the battery surface.

[0044] Throughout the inspection cycle, the robotic arm 201 executes complex trajectory movements under the control system of the equipment 100. When it is necessary to transfer empty or fully loaded pallets, the mechanical gripper 203 moves to perform gripping and releasing. When it is necessary to transfer individual batteries for inspection, angle adjustment, or sorting, the vacuum system is activated, the suction nozzle 204 adsorbs the battery, and the mechanical gripper 203 remains open. The design of the gripper and suction nozzle 204 allows the single robotic arm 201 to perfectly adapt to the handling tasks of two different sizes and objects, pallets and lithium-ion batteries, greatly improving the integration and operational flexibility of the equipment.

[0045] See Figure 6In one embodiment, the base of the defective product rack 400 is composed of multiple first guide pillars 403, which are fixed on the equipment platform 100 respectively. The upper ends of the pillars support a fixed plate 402. An extension bracket 401 is provided on the upper end of the fixed plate 402. The height of the extension bracket 401 is higher than that of the loading rack 320 and the good product rack 310, so as to facilitate the differentiation and handling by the handling mechanism 200. Guide plates are provided on the top of the extension bracket 401. The defective product placement part 404 is formed by limiting the guide plates on the extension bracket 401. The handling mechanism 200 places the measured defective products into the loading tray of the extension bracket 401 to complete the placement of defective products.

[0046] See Figure 7 In one embodiment, the main body of the detection mechanism 500 is a fixed base 501 fixed to the equipment platform 100 by bolts or other means. A first test component 502 and a second test component 503 are disposed on the fixed base 501. The two components are installed opposite each other, forming an electrode pair for testing the battery. At least one pair of test probes are installed at the end of each test component facing the battery, for contacting and testing the two tabs of the lithium-ion battery. When the battery is fed into the testing station, the probes of the first test component 502 and the second test component 503 contact the tabs facing each other, and the probes press tightly and reliably against the two tabs of the lithium-ion battery, forming a low-resistance, high-stability electrical connection path for accurately applying test signals and acquiring current signals such as battery voltage and internal resistance.

[0047] A placement plate 505 is provided between the first test component 502 and the second test component 503. The placement plate 505 is fixed to the fixed base 501 by a bracket. The placement plate 505 has multiple placement slots 506. The shape of these slots 506 matches the shape of the lithium-ion battery to be tested, and their function is to accurately place the batteries placed by the transport mechanism 200. A rotary positioning component 504 is provided at the lower end of the fixed base 501, and its top end is connected to the placement slots 506. Rotational positioning ensures that the tabs of each battery are accurately aligned with the test probes on both sides. The design of multiple placement slots 506 allows the transport mechanism 200 to place multiple lithium-ion batteries at once for sequential or parallel testing, thereby significantly improving the test throughput per unit time and thus enhancing the efficiency of the testing.

[0048] The first test component 502 and the second test component 503 are electrically connected to a tester located inside the equipment 100 via internal cables. According to a preset program, the tester applies test signals to the battery through the test components and simultaneously acquires the battery's response signals through the same set of probes. The acquired detection signals are transmitted to the tester in real time for analysis and calculation, ultimately obtaining the battery's internal resistance, voltage, and other performance parameters, and determining whether the battery is a good product.

[0049] See Figure 9In one embodiment, the base of the battery transfer mechanism 700 is composed of multiple second guide pillars 701. The lower ends of these pillars are securely fixed to the equipment base 100 by threads, and the upper ends together support and fix the carrying platform 702. Multiple positioning clamps 703 are provided on the upper surface of the carrying platform 702. Each positioning clamp 703 is used to accommodate and fix a lithium-ion battery. The specific form of the positioning clamp 703 can be a V-shaped gripper, a holder with spring clips, or a cavity matching the shape of the battery, which is used to restrict the battery's degree of freedom in the horizontal plane, ensuring that its axis is located in a predetermined position. Each positioning fixture 703 is connected to an independent drive control component 704 at its lower end. This component is built into or installed below the support platform 702. Its specific form can be a piezoelectric ceramic micro stage, a precision eccentric rotation mechanism, or a micro linear motor module. It is used to receive instructions from the control system and drive the positioning fixture 703 above and the battery it holds to perform high-precision displacement within a small range in the plane, thereby realizing the concentricity correction of the battery and ensuring that its physical axis coincides with the theoretical axis of the subsequent inspection station.

[0050] On the side of the support platform 702, corresponding to the position of each positioning fixture 703, a second sensor assembly 705 for monitoring and sensing is provided. This sensor is preferably a photoelectric sensor or a fiber optic sensor; in this embodiment, a photoelectric sensor is preferred, with its detection beam precisely aligned with a specific part of the battery in the positioning fixture 703. It is used to detect whether the lithium-ion battery has been correctly placed into the positioning fixture 703 by the handling mechanism 200 and provides a corresponding feedback signal to the control system. Based on the feedback signal, the control system within the equipment 100 drives the control assembly 704 to make fine adjustments or allows the handling mechanism 200 to perform a removal action.

[0051] See Figure 10 In one embodiment, the second image detection device 800 is supported above the equipment platform 100 by multiple third guide pillars 801. Preferably, the installation height of the third guide pillars 801 is designed so that their upper ends are higher than the detection mechanisms 500 on both sides, ensuring that the field of view of the mechanism is not obstructed by any component of the detection mechanism 500, allowing for an unobstructed view of the battery placement station below. A first mounting plate 802 is fixed to the upper end of the multiple third guide pillars 801, forming the top mounting plane of the entire angle detection system.

[0052] Below the first mounting plate 802, a second mounting plate 803 is provided, capable of linear reciprocating motion in a specific direction. One end of the second mounting plate 803 is fixedly connected to a U-shaped mounting bracket 804. The mounting bracket 804 is located at the end of the second mounting plate 803 furthest from the conveying mechanism 200, and this U-shaped structure gives the mounting bracket 804 two upwardly extending cantilever arms. At each of the two ends of the U-shaped mounting bracket 804, an angle detection component 810 is slidably mounted. Preferably, each angle detection component 810 incorporates an industrial camera and a vision sensor with a specific angle light source. The spatial positions of these two angle detection components 810 are precisely set so that their fields of view are respectively aligned with the battery placement positions of the two symmetrically arranged detection units 5000 on the equipment platform 100.

[0053] To allow for fine-tuning of the detection position to accommodate different battery specifications or optimize imaging effects, a long, narrow groove 805 is vertically formed at each cantilever end of the mounting bracket 804. Each angle detection component 810 engages with the groove 805 via a sliding plate 811. Specifically, a pulley is provided at one end of the sliding plate 811, which slides up and down within the groove 805. The plate is secured by a locking screw inside the sliding plate 811. The angle detection component 810, along with the sliding plate 811, can be manually or with the aid of tools slid up and down along the groove 805, thereby precisely adjusting the camera's acquisition height. After adjustment, tightening the locking screw securely locks the device in place.

[0054] See Figure 4 In one embodiment, a limiting piece 313 is also provided on the conveyor assembly 302 on the side of the good product rack 310 away from the inspection area 330. The limiting piece 313 is a solid block fixed on the conveyor assembly 302. When the moving plate 307 carries the tray along the conveyor line toward the good product rack 310, if the moving plate 307 continues to move forward and touches the limiting piece 313 when placed on the good product rack 310, the moving plate 307 will be physically blocked and unable to continue moving forward, ensuring the accuracy of the end position of each transportation cycle.

[0055] The workflow of this invention is as follows: A stack of trays containing untested batteries, placed on the loading rack 320, is lifted to a certain height by the second lifting component 322 at the bottom. The conveying mechanism 300 transports the trays at the bottom to the lower end of the loading trough 335 in the testing area 330 via the moving plate 307. The lifting device 333 then raises the trays into the placement trough 506. The mechanical gripper 203 of the handling mechanism 200 directly uses its end suction nozzle 204 to pick up the batteries in the trays of the placement trough 506. Before being placed into the battery transfer mechanism 700, the batteries pass through the first image detection device 600, which scans the battery's QR code and uploads the information to the control system to bind the battery's identity. Then, the handling mechanism 200 places the batteries into the positioning fixture 703 of the battery transfer mechanism 700. After the second sensor component 705 detects that the battery is in place, its lower drive control component 704 performs fine-tuning of the battery according to instructions to complete concentricity correction.

[0056] The transport mechanism 200 removes the battery from the transfer mechanism, preparing it for placement on the placement plate 505 of the testing mechanism 500. Before and after this placement, the second image detection device 800, located at a higher position, is activated. Its two angle detection components 810 monitor the two testing stations respectively, capturing images of the battery and calculating its placement angle in real time. If the angle exceeds the tolerance, the system uploads a signal to the rotation positioning component 504 until the battery's electrode position is aligned with the detection probe position of the testing mechanism 500. After the battery is accurately placed into the placement slot 506, the first and second testing components 503 of the testing mechanism 500 move towards each other. The test probes on them, under the action of internal springs, make close contact with the battery electrodes, and the test instrument inside the machine emits a test signal to complete the electrical performance tests such as voltage and internal resistance. The test results are fed back in real time. The conveying mechanism 200 sorts the products according to the results: good products are returned to their original trays, i.e., the top tray of the inspection area 330, and the mechanical grippers 203 of the conveying mechanism 200 pick up the trays and place them into the loading trough 335 of the inspection area 330; defective products are placed directly into the defective product rack 400. The trays containing good products are transported from the inspection area 330 to the good product rack 310 via the moving plate 307, where they are stacked by the first lifting mechanism, and this process is repeated. This completes the automatic screening and inspection of lithium-ion batteries.

[0057] In one embodiment, the first test component 502 and the second test component 503 are each equipped with two test probes corresponding to a placement slot 506. A placement slot 506 for positioning a single battery is provided on the placement plate 505 of the detection mechanism 500. The first test component 502 and the second test component 503 are positioned facing each other on both sides of the placement slot 506. For each placement slot 506, two test probes are independently provided on the corresponding first test component 502 and second test component 503. That is, on the end of the test component facing the battery, two pairs of independent probe contact points are arranged side-by-side or vertically for the same electrode area of ​​the same battery. These include probes for contacting the positive and negative electrodes of the battery. When the lithium-ion battery is placed into the placement slot 506 and the test component performs a closing test, the probes of the first test component 502 and the second test component 503 simultaneously and independently form stable elastic contact with the positive and negative electrodes of the battery, respectively contacting both sides of the battery electrode tab, forming a stable dual-channel detection.

[0058] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lithium-ion battery testing device, characterized in that, include: Equipment (100); A conveying mechanism (200) is mounted on the equipment base (100); A testing instrument is provided on the equipment platform (100). The testing instrument has multiple testing units (5000) located on the equipment platform (100). The multiple testing units (5000) are located in the peripheral working area of ​​the conveying mechanism (200). Each testing unit (5000) has a testing station for testing lithium-ion batteries. The testing instrument is used to test the parameters of the lithium-ion batteries at their respective testing stations through each testing unit (5000). Multiple material racks (3000) are provided, each of the material racks (3000) is provided corresponding to one of the detection units (5000), and each of the material racks (3000) has a detection area (330). The conveying mechanism (200) is used to perform conveying actions between each of the detection units (5000) and their respective corresponding material racks (3000). Each conveying action includes conveying the lithium-ion battery on the test area (330) of each material rack (3000) to the test station of the corresponding detection unit (5000); and, after the test is completed, moving it back to the corresponding material rack (3000).

2. The lithium-ion battery testing equipment as described in claim 1, characterized in that, Each of the aforementioned material racks (3000) includes a conveying mechanism (300), a loading rack (320), a good product rack (310), and a defective product rack (400) respectively disposed on the equipment base (100); the inspection area (330) is disposed on the conveying mechanism (300), the loading rack (320) and the good product rack (310) are disposed at both ends of the conveying mechanism (300), and the conveying mechanism (300) is used to transfer the trays of the loading rack (320), the good product rack (310) and the inspection area (330).

3. The lithium-ion battery testing equipment as described in claim 1, characterized in that, The detection unit (5000) includes a detection mechanism (500), a first image detection device (600), a second image detection device (800), and a battery transfer mechanism (700) respectively installed on the equipment base (100). A battery transfer mechanism (700) is used to detect the concentricity of lithium-ion batteries; The first image detection device (600) is used to detect the QR code status of the lithium-ion battery; The second image detection device (800) is used to detect the battery placement angle; The testing unit (500) is used to emit a detection signal to detect lithium-ion batteries and transmit the detection signal to the tester.

4. The lithium-ion battery testing equipment as described in claim 2, characterized in that, The conveying mechanism (300) includes multiple fixed legs (301) fixed on the equipment base (100), and a conveying line assembly (302) is arranged on the multiple fixed legs (301). The conveying line assembly (302) is provided with multiple first synchronous pulleys (303). A drive motor (305) is provided at the lower end of the conveying line assembly (302). A second synchronous pulley (306) is provided on the drive motor (305). The first synchronous pulleys (303) are connected to the second synchronous pulleys (306) through a synchronous belt (304). The area to be inspected (330) is fixed on the conveying line assembly (302) between the uninspected area and the good product rack (310). A movable plate (307) is provided on the conveying line assembly (302). The movable plate (307) moves with the drive motor (305) driving the synchronous belt (304).

5. The lithium-ion battery testing equipment as described in claim 4, characterized in that, The area to be tested (330) includes a fixed guide plate (331) set on the conveyor assembly (302). The fixed guide plate (331) limits the formation of a feeding trough (335). The lower end of the feeding trough (335) is provided for the passage of a moving plate (307). A lifting device (333) is provided at the bottom of the feeding trough (335). A first sensor assembly (332) for detection is also provided on both sides of the fixed guide plate (331). The first sensor is set on the fixed guide plate (331) and is used to detect the tray in the feeding trough (335). A blocking cylinder assembly (334) is also provided on the side of the feeding trough (335) facing the good product rack (310).

6. The lithium-ion battery testing equipment as described in claim 2, characterized in that, The good product rack (310) is formed by multiple limiting rods (340) fixed to one end of the conveying mechanism (300) and is used to accommodate the stacked trays of tested lithium-ion batteries. The lower end of the good product rack (310) is provided with a first lifting component (312). The limiting rods (340) of the good product rack (310) are provided with a check valve component (311). The limiting rods (340) of the good product rack (310) and the conveying line component (302) are fixed with a notch (341) for the moving plate (307) to pass through. The loading rack (320) is formed by multiple limiting rods (340) fixed to the other end of the conveying mechanism (300) and is used to accommodate stacked untested lithium-ion battery trays. A second lifting component (322) is provided at the lower end of the testing area (330). Tray limiting components (321) are provided on both sides of the testing area (330). A notch (341) is provided at the fixed position of the limiting rod (340) of the testing area (330) and the conveying line assembly (302) for the moving plate (307) to pass through.

7. The lithium-ion battery testing equipment as described in claim 1, characterized in that, The conveying mechanism (200) is a robotic arm (201). The robotic arm (201) is fixed to the rear side of the middle of the upper surface of the equipment platform (100). A connecting shaft (202) is provided on the robotic arm (201). The connecting shaft (202) is connected to a mechanical gripper (203) for gripping the tray. The end of the mechanical gripper (203) is provided with a suction nozzle (204) for adsorbing lithium-ion batteries.

8. The lithium-ion battery testing equipment as described in claim 3, characterized in that, The testing mechanism (500) includes a fixed base (501) fixed on the equipment platform (100). The fixed base (501) is provided with a first testing component (502) and a second testing component (503) for testing the quality of lithium-ion batteries. The first testing component (502) and the second testing component (503) are arranged facing each other. Both the first testing component (502) and the second testing component (503) are provided with test probes capable of detecting the current signal of the lithium-ion battery. The fixed base (501) is equipped with... A placement plate (505) is provided, and multiple placement slots (506) are provided on the placement plate (505). A rotation positioning component (504) connected to the fixed slot is provided at the lower end of the fixed base (501) for positioning when placing the battery. The placement plate (505) is located between the first test component (502) and the second test component (503). The first test component (502) and the second test component (503) are electrically connected to the tester inside the equipment platform (100) for transmitting the detection signal to the tester.

9. The lithium-ion battery testing equipment as described in claim 3, characterized in that, The transfer mechanism includes multiple second guide pillars (701) fixed to the equipment platform (100). The upper ends of the multiple second guide pillars (701) are provided with a bearing platform (702). Multiple positioning clamps (703) for fixing lithium-ion batteries are provided on the bearing platform (702). The lower ends of the positioning clamps (703) are connected to the drive control component (704). The side of the bearing platform (702) is also provided with a second sensor component (705) for detection and sensing corresponding to the positioning clamps (703).

10. The lithium-ion battery testing equipment as described in claim 3, characterized in that, The second image detection device (800) includes multiple third guide pillars (801) higher than the detection mechanism (500). A first mounting plate (802) is provided at the upper end of the third guide pillar (801). A second mounting plate (803) capable of linear reciprocating motion is provided on the first mounting plate (802). A mounting bracket (804) is provided at one end of the second mounting plate (803). The mounting bracket (804) is U-shaped. An angle detection component (810) is slidably provided at the end of the U-shaped mounting bracket (804) to detect the lithium-ion battery placement angle of the two detection mechanisms (500) of the equipment platform (100). A sliding groove (805) is provided at the end of the mounting bracket (804). The angle detection component (810) is slidably connected to the end of the mounting bracket (804) through a sliding plate (811) and the sliding groove (805) to adjust the acquisition height of the angle monitoring component.

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