A kind of battery cell voltage internal resistance automatic test machine based on stacking tray

Abstract

The application discloses a kind of based on the automatic test machine of stack tray cell voltage resistance, including stack tray automatic loading and unloading mechanism, loading variable-distance handling manipulator, cell positioning mechanism, carousel mechanism, code scanning temperature measuring mechanism, OCV detection mechanism, unloading variable-distance manipulator and cell NG unloading mechanism.The device realizes the full-process automation operation of cell from stack tray conveying, variable-distance handling, synchronous positioning, carousel circulation, code scanning temperature measurement, parallel OCV detection and sorting unloading, through optimizing mechanism layout and multi-station collaborative control, significantly improve production efficiency, detection accuracy and equipment flexibility, meet the demand of new energy automobile, energy storage system and other fields to high-precision, high-tact and multi-specification cell intelligent detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery cell detection equipment, in particular to a battery cell voltage and internal resistance automatic test machine based on a stacked tray. BACKGROUND

[0002] With the wide application of lithium ion batteries in new energy vehicles, energy storage systems and other fields, the quality detection link in the production process of battery cells has increasingly high requirements for automation, efficiency and test accuracy. As core indicators of battery cell performance, open circuit voltage (OCV) and internal resistance directly affect production efficiency and product consistency. Traditional detection equipment often uses manual feeding and discharging or semi-automatic step-by-step testing mode, which has low efficiency, large test data fluctuation, poor process connection, and other problems, and cannot meet the demand of large-scale intelligent manufacturing.

[0003] In the prior art, patent CN107064810B discloses a battery cell OCV test machine, which realizes multi-station circulation through a turntable mechanism, and integrates code scanning, testing and discharging functions. However, its feeding and discharging process relies on a single robot to handle each piece, the number of battery cells processed at a time is limited, and no variable distance mechanism is configured, resulting in poor adaptability of different specifications of battery cells. Patents CN110927603B and CN110794320A further optimize the test process, introduce visual positioning, tab shaping and temperature detection modules, and use double battery cell parallel processing and adjustable probe structure to improve compatibility. However, such equipment still has the following technical bottlenecks: (1) the cooperation efficiency between the feeding and discharging mechanism and the test station is insufficient, the tray switching needs frequent shutdown, affecting the beat; (2) the multi-battery cell synchronous positioning accuracy is insufficient, and the test stability is easily reduced due to poor tab contact; (3) the code scanning, temperature measurement and electrical performance detection links are dispersedly arranged, and there is idle waiting time between processes; (4) the NG battery cell sorting relies on independent robots or manual intervention, the sorting path is complex and prone to material mixing. In addition, the variable distance mechanism of the existing equipment mostly uses fixed stroke adjustment, which is difficult to adapt to the rapid switching demand of mixed production of multiple specifications of battery cells, resulting in insufficient flexibility of the equipment. SUMMARY

[0004] The purpose of the present application is to provide a battery cell voltage and internal resistance automatic test machine based on a stacked tray, which realizes the whole process integration of battery cells from accurate positioning, synchronous code scanning and temperature measurement to efficient OCV detection by optimizing the mechanism layout and multi-station cooperation control, and improves the multi-battery cell parallel processing capability and the real-time sorting efficiency of defective products, to meet the intelligent manufacturing demand of high-precision, high-beat and multi-specification compatibility of power batteries.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A kind of automatic test machine of battery cell voltage internal resistance based on stacking tray, including stacking tray automatic loading and unloading mechanism, loading variable-distance carrying manipulator, battery cell positioning mechanism, carousel mechanism, code scanning temperature measuring mechanism, OCV detection mechanism, unloading variable-distance manipulator and battery cell NG unloading mechanism;The stacking tray automatic loading and unloading mechanism is used to transport stacked tray to battery cell loading position and stack the battery cell tested as OK to unload;The loading variable-distance carrying manipulator is arranged between stacking tray automatic loading and unloading mechanism and battery cell positioning mechanism, for obtaining at least two battery cells in tray to be transported to battery cell positioning mechanism with variable distance;The battery cell positioning mechanism is used to position multiple battery cells simultaneously, and after positioning, loading variable-distance carrying manipulator transports battery cell to carousel mechanism;The carousel mechanism is arranged on the side of battery cell positioning mechanism, and transports battery cell to code scanning temperature measuring mechanism;The code scanning temperature measuring mechanism is arranged on the side of carousel mechanism, for simultaneously obtaining the temperature of battery cell and obtaining the information on the two-dimensional code or bar code of battery cell, then carousel mechanism continues to transport battery cell to OCV detection mechanism;The OCV detection mechanism is arranged on the side of carousel mechanism, for simultaneously detecting the OCV of multiple battery cells, then carousel mechanism continues to transport battery cell to unloading variable-distance manipulator;The unloading variable-distance manipulator is used to transport at least two OK battery cells on carousel mechanism to empty tray of stacking tray automatic loading and unloading mechanism with variable distance, and transports NG battery cell to battery cell NG unloading mechanism;The battery cell NG unloading mechanism unloads NG battery cell.

[0007] In one embodiment, the stacking tray automatic loading and unloading mechanism includes tray feeding positioning device, tray jacking device, tray positioning and separating device, empty tray CCD detection device, empty tray transfer manipulator and tray discharging positioning device, the tray feeding positioning device is used for initial positioning and fine positioning of stacked tray respectively, the tray jacking device is arranged in the tray feeding positioning device, for jacking the stacked tray, the tray positioning and separating device is arranged on both sides of the tray feeding positioning device respectively, for positioning the single tray on the top layer and separating the tray on the next layer when taking away the top layer tray, the empty tray CCD detection device is arranged above the tray feeding positioning device, for detecting whether the top layer tray has battery cell, the empty tray transfer manipulator is arranged between the tray feeding positioning device and the tray discharging positioning device, the empty tray transfer manipulator is used to transfer the empty tray at the tray feeding positioning device to the tray discharging positioning device, and the tray discharging positioning device is used for discharging the stacked tray.

[0008] In one of the embodiments, the tray feeding positioning device comprises a feeding pull belt, a stacked tray initial positioning assembly and a stacked tray fine positioning device, the feeding pull belt is used to transport the stacked trays, the stacked tray initial positioning assembly is arranged on both sides of the feeding pull belt and used to preliminarily position the lower side of the stacked trays, and the stacked tray fine positioning device is arranged on both sides of the feeding pull belt and used to fine position the whole stacked tray.

[0009] In one of the embodiments, the tray feeding positioning device further comprises a blocking assembly arranged above the stacked tray initial positioning assembly and used to block the subsequent stacked tray from entering the fine positioning area.

[0010] In one of the embodiments, the stacked tray initial positioning assembly comprises a first initial positioning plate, a second initial positioning plate and an initial positioning driving device, the first initial positioning plate and the second initial positioning plate are arranged on both sides of the feeding pull belt respectively, and the initial positioning driving device is used to drive the first initial positioning plate and the second initial positioning plate to move close to or away from each other.

[0011] In one of the embodiments, the tray positioning and separating device comprises a positioning and separating block and a positioning and separating driving device, the separating block is mounted on the positioning and separating driving device, and the positioning and separating driving device is used to drive the separating block to move close to or away from the tray.

[0012] In one of the embodiments, the battery cell positioning mechanism comprises an X-axis positioning device, a Y-axis positioning device and a positioning platform, the X-axis positioning device and the Y-axis positioning device are both mounted on the positioning platform, the X-axis positioning device is used to position the battery cell in the X-axis direction, and the Y-axis positioning device is used to position the battery cell in the Y-axis direction.

[0013] In one of the embodiments, the code scanning and temperature measuring mechanism comprises a code scanner, a temperature measuring instrument, a first horizontal moving seat and a first horizontal moving driving module, the code scanner and the temperature measuring instrument are both mounted on the first horizontal moving seat, the first horizontal moving seat is mounted on the first horizontal moving driving module, and the first horizontal moving driving module is used to drive the code scanner and the temperature measuring instrument to move close to or away from the battery cell.

[0014] In one of the embodiments, the OCV detection mechanism comprises a mounting rack, a Z horizontal moving driving module, a probe mounting seat, a positive probe assembly and a negative probe assembly, the positive probe assembly and the negative probe assembly are both mounted on the probe mounting seat, the probe mounting seat is mounted on the Z horizontal moving driving module, the Z horizontal moving driving module is mounted on the mounting rack, and the Z horizontal moving driving module is used to drive the probe mounting seat to move up and down with the positive probe assembly and the negative probe assembly.

[0015] In one of the embodiments, the positive probe assembly includes a positive mounting base plate, a positive mounting panel, a first positive probe and a second positive probe, the first positive probe and the second positive probe are arranged between the positive mounting base plate and the positive mounting panel, the positive mounting panel fixes the first positive probe and the second positive probe on the positive mounting base plate, the negative probe assembly includes a negative mounting base plate, a negative mounting panel, a first negative probe and a second negative probe, the first negative probe and the second negative probe are arranged between the negative mounting base plate and the negative mounting panel, and the negative mounting panel fixes the first negative probe and the second negative probe on the negative mounting base plate.

[0016] The beneficial effects of the present application are:

[0017] The present application realizes batch taking out and accurate conveying of the battery cell from the tray by adopting the stacked tray automatic feeding and discharging mechanism and the feeding variable-distance handling manipulator, avoids the low efficiency problem caused by traditional single piece by piece handling, and greatly improves the overall production rhythm. The battery cell positioning mechanism can accurately position multiple battery cells at the same time, ensure the accurate position of the battery cell between stations, reduce the test data fluctuation caused by positioning deviation, and improve the detection accuracy and data consistency. The reasonable layout of the rotary table mechanism and the code scanning and temperature measuring mechanism enables the battery cell to realize synchronous code scanning and temperature detection after being transferred in place, saves the process switching time, and significantly improves the detection efficiency. The OCV detection mechanism detects multiple battery cells in parallel, improving the test speed. The discharging variable-distance manipulator accurately transfers the battery cells detected as OK to the empty tray by automatically adjusting the grabbing distance, and simultaneously realizes the shunting treatment of NG battery cells, effectively reducing the risk of mixing or misjudgment in the subsequent sorting process. The overall system adopts integrated design of the whole process, realizes seamless connection of various processes such as feeding, detection and sorting, greatly shortens the equipment downtime and tray switching time, and meets the demand of large-scale intelligent manufacturing for high rhythm production. The dynamic variable-distance handling technology makes the equipment have high flexibility, can adapt to mixed production of multiple specifications of battery cells, reduces the manpower and time cost required for model change and adjustment, and improves the comprehensive utilization rate and economic benefit of the production line.

[0018] In summary, the battery cell voltage and resistance automatic test machine based on stacked tray provided by the present application realizes the whole process automation operation from accurate positioning, synchronous code scanning and temperature measurement to efficient OCV detection through optimization of mechanism layout and multi-station cooperative control, significantly improves the production efficiency, detection accuracy and equipment flexibility, and meets the intelligent manufacturing demand of high precision, high rhythm and multi-specification compatibility of battery cells in the field of new energy vehicles, energy storage systems and other fields. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure schematic diagram of the battery cell voltage and resistance automatic test machine based on stacked tray provided by an embodiment of the present application;

[0020] Figure 2 A top view of the automatic stacking tray loading and unloading mechanism according to an embodiment of the present application;

[0021] Figure 3 A perspective view of the automatic stacking tray loading and unloading mechanism according to an embodiment of the present application;

[0022] Figure 4 a structure schematic diagram of the stacking tray before positioning and separation according to an embodiment of the present application, Figure 4 b structure schematic diagram of the stacking tray before positioning and separation according to an embodiment of the present application; Figure 4 c structure schematic diagram of the stacking tray after positioning and separation according to an embodiment of the present application;

[0023] Figure 5 A structure schematic diagram of the battery cell positioning mechanism according to an embodiment of the present application;

[0024] Figure 6 A structure schematic diagram of the rotating disc mechanism according to an embodiment of the present application;

[0025] Figure 7 A structure schematic diagram of the code scanning and temperature measuring mechanism according to an embodiment of the present application;

[0026] Figure 8 A structure schematic diagram of the OCV detection mechanism according to an embodiment of the present application;

[0027] Figure 9 A structure schematic diagram of the battery cell NG unloading mechanism according to an embodiment of the present application;

[0028] Explanation of reference signs:

[0029] 1, automatic stacking tray loading and unloading mechanism; 2, loading variable-distance carrying manipulator; 3, battery cell positioning mechanism; 4, rotating disc mechanism; 5, code scanning and temperature measuring mechanism; 6, OCV detection mechanism; 7, unloading variable-distance manipulator; 8, battery cell NG unloading mechanism; 9, stacking tray; 11, tray feeding positioning device; 12, tray jacking device; 13, tray positioning and separating device; 14, empty tray CCD detection device; 15, empty tray transfer manipulator; 16, tray discharging positioning device; 111, feeding pull belt; 112, stacking tray initial positioning assembly; 113, stacking tray fine positioning device; 114, material blocking assembly; 1121, first initial positioning plate; 1122, second initial positioning plate; 1123, initial positioning driving device; 1141, material blocking plate; 1142, material blocking cylinder; 1123a, motor; 1123b, right and left threaded screw rod; 1123c, guide assembly;

[0030] 131, Positioning separation block; 132, Positioning separation drive device; 1311, Positioning part; 1312, Separation part; 31, X-axis positioning device; 32, Y-axis positioning device; 33, Positioning platform; 311, X-axis positioning assembly; 312, X-axis positioning fixed rod; 3111, X-axis positioning push rod; 3112, Buffer assembly; 3113, Second horizontal movement seat; 3114, Second horizontal movement drive module; 3112a, Buffer spring; 3112b, Buffer slide rail; 3112c, Limiting block; 321, Y-axis positioning push block; 41, Cell fixing; 51, Code scanner; 52, Temperature measuring instrument; 53, First horizontal movement seat; 54, First horizontal movement drive module; 61, Mounting frame; 62, Z horizontal movement drive module; 63, Probe mounting seat; 64, Positive probe assembly; 65, Negative probe assembly; 66, Needle tip part; 641, Positive mounting bottom plate; 642, Positive mounting faceplate; 643, First positive probe; 644, Second positive probe; 651, Negative mounting bottom plate; 652, Negative mounting faceplate; 653, First negative probe; 654, Second negative probe; 631, Guide groove; 632, Guide ridge; 81, NG unloading robot; 82, NG unloading transfer table; 83, First NG material frame; 84, Second NG material frame; DETAILED DESCRIPTION

[0031] The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] The term "stacked tray 9" in the present application refers to that the battery cell is first placed on a dedicated tray, and these trays are arranged and stored in a stacked manner.

[0033] The term OCV detection in the present application refers to "open circuit voltage detection", which means measuring the voltage of the battery cell without loading any load. This detection can reflect the state of charge and health of the battery cell, and is an important indicator for evaluating the performance of the battery cell.

[0034] As shown in Figure 1 A battery cell voltage and resistance automatic testing machine based on stacked trays, comprising a stacked tray automatic feeding and discharging mechanism 1, a feeding variable-distance handling robot 2, a battery cell positioning mechanism 3, a turntable mechanism 4, a code scanning and temperature measuring mechanism 5, an OCV detection mechanism 6, a discharging variable-distance robot 7, and a battery cell NG discharging mechanism 8. The full automation operation of the battery cell from feeding, positioning, detection to intelligent sorting is realized, the production efficiency and detection accuracy are significantly improved, and the flexibility of the equipment is improved.

[0035] Stacked tray automatic feeding and unloading mechanism 1: This mechanism is responsible for the feeding and unloading of the battery cells throughout the entire test process. Before the test begins, it transports the tray stacked with battery cells to the battery cell feeding position. After the test is completed, it restacks the battery cells that have passed the test into an empty tray for subsequent use or storage.

[0036] Feeding variable-distance handling robot 2: This robot is responsible for taking out at least two battery cells from the stacked tray automatic feeding and unloading mechanism 1, and in this embodiment, it takes out two battery cells, and adjusts the distance between the battery cells according to the placement requirements of the battery cells in the battery cell positioning mechanism 3. This step ensures that the battery cells can be arranged according to the predetermined position and spacing when they are transferred to the battery cell positioning mechanism 3, preparing for the subsequent positioning and testing work. After the adjustment is completed, the robot accurately transfers the battery cells to the battery cell positioning mechanism 3.

[0037] Battery cell positioning mechanism 3: This mechanism is used to synchronize the positioning of multiple battery cells, and in this embodiment, it synchronously positions four battery cells. In this way, during the subsequent testing process, the battery cells can remain stable and will not affect the test results due to positional deviation. After positioning is completed, the feeding variable-distance handling robot 2 transfers the battery cells to the next testing link.

[0038] Rotary table mechanism 4: This mechanism is arranged between the battery cell positioning mechanism 3 and the subsequent testing mechanism, and is responsible for transferring the battery cells from one testing link to another. It uses rotary motion to achieve fast and accurate transfer of the battery cells. During the testing process, the rotary table mechanism 4 continuously transfers the battery cells from the battery cell positioning mechanism 3 to the code scanning and temperature measuring mechanism 5, OCV detection mechanism 6, etc., and then transfers the tested battery cells to the unloading variable-distance robot 7.

[0039] Code scanning and temperature measuring mechanism 5: This mechanism is used to simultaneously obtain the temperature of the battery cells and the information on the two-dimensional code or bar code of the battery cells. It uses code scanning equipment and temperature sensors to achieve fast and accurate code scanning and temperature measurement of the battery cells. These information is of great significance for evaluating the performance and health status of the battery cells. After code scanning and temperature measurement are completed, the rotary table mechanism 4 continues to transfer the battery cells to the next testing link.

[0040] OCV detection mechanism 6: This mechanism is used to simultaneously detect the OCV of multiple battery cells, and in this embodiment, it detects the OCV of four battery cells. It uses voltage measurement equipment to measure the voltage value of the battery cells in the open circuit state. This voltage value reflects the energy storage capacity and performance status of the battery cells. After OCV detection is completed, the rotary table mechanism 4 continues to transfer the battery cells to the unloading variable-distance robot 7.

[0041] Material unloading variable-pitch robot 7: This robot is responsible for removing the tested battery cells from the turntable mechanism 4 and classifying them according to the test results. For battery cells that pass the test, the robot uses variable-pitch transfer to the empty tray of the stacking tray automatic loading and unloading mechanism 1; for battery cells that fail the test, the robot transfers them to the battery cell NG unloading mechanism 8 for unloading.

[0042] NG Cell Unloading Mechanism 8: This mechanism is responsible for unloading battery cells that test as NG. It uses mechanical or pneumatic devices to remove the NG cells from the conveyor belt and place them in a designated location or container. This completes the isolation and processing of the NG battery cells.

[0043] like Figure 2 As shown, in this embodiment, the automatic loading and unloading mechanism 1 for stacked trays includes a tray feeding and positioning device 11, a tray lifting device 12, a tray positioning and separating device 13, an empty material CCD detection device 14, an empty tray transfer robot 15, and a tray discharging and positioning device 16. The tray feeding and positioning device 11 is used to perform initial positioning and fine positioning of the stacked trays respectively. The tray lifting device 12 is installed inside the tray feeding and positioning device 11 and is used to lift the stacked trays. The tray positioning and separating device 13 is respectively installed on both sides of the tray feeding and positioning device 11. The uppermost single tray is positioned and separated from the trays below when the uppermost tray is removed. The empty tray CCD detection device 14 is set above the tray feeding and positioning device 11 to detect whether there are battery cells in the uppermost tray. The empty tray transfer robot 15 is set between the tray feeding and positioning device 11 and the tray discharging and positioning device 16. The empty tray transfer robot 15 is used to transfer the empty tray at the tray feeding and positioning device 11 to the tray discharging and positioning device 16. The tray discharging and positioning device 16 is used to discharge the stacked trays.

[0044] In this embodiment, by integrating multiple functional modules such as the material tray feeding and positioning device 11, the material tray lifting device 12, the material tray positioning and separation device 13, the empty material CCD detection device 14, the empty tray transfer robot 15, and the material tray discharge and positioning device 16, the automated loading and unloading of battery cell trays is achieved. This not only improves production efficiency but also reduces the tediousness and errors of manual operation, making the entire testing process smoother and more efficient.

[0045] The tray feeding and positioning device 11 can perform initial and fine positioning of stacked trays, ensuring the stability and accuracy of the trays during the conveying process. The tray positioning and separation device 13 can accurately position the topmost individual tray and separate it from the trays of the next layer when the top tray is removed, avoiding adhesion or misalignment between trays and ensuring the smooth removal and testing of battery cells. The empty tray CCD detection device 14 can detect in real time whether there are battery cells in the top tray, which is of great significance for timely detection and handling of empty trays. Once an empty tray is detected, the empty tray transfer robot 15 will respond quickly and transfer the empty tray to the tray discharge and positioning device 16 for timely replacement or handling. This intelligent detection and feedback mechanism improves the accuracy and reliability of testing.

[0046] like Figure 3 As shown, in this embodiment, the material tray feeding and positioning device 11 includes a feeding pull belt 111, a stacked material tray initial positioning component 112, and a stacked material tray fine positioning device 113. The feeding pull belt 111 is used to transport the stacked material trays. The stacked material tray initial positioning component 112 is disposed on both sides of the feeding pull belt 111 and is used to perform preliminary positioning on the lower side of the stacked material trays. The stacked material tray fine positioning device 113 is disposed on both sides of the feeding pull belt 111 and is used to perform fine positioning on the entire stacked material tray.

[0047] The initial positioning component 112 for the stacked trays is located on both sides of the feed conveyor belt 111 and performs preliminary positioning on the underside of the stacked trays. This step is mainly to prevent the trays from shifting or tilting during the conveying process, providing a basis for subsequent fine positioning. The initial positioning component is simple and effective in design, and can quickly and accurately complete the preliminary positioning task.

[0048] Based on the initial positioning, the precision positioning device further refines the overall positioning of the stacked trays. This step ensures the accuracy and stability of the trays within the positioning area, providing strong support for subsequent cell removal and testing. The precision positioning device may employ high-precision sensors and control systems to achieve precise adjustment and control of the tray position.

[0049] like Figure 3 As shown in this embodiment, the tray feeding and positioning device 11 further includes a baffle assembly 114, which is located above the initial positioning assembly 112 of the stacked trays, and is used to prevent subsequent stacked trays from entering the fine positioning area. Two sets of baffle assemblies 114 are provided, including a baffle plate 1141 and a baffle cylinder 1142. When the stacked trays are conveyed to the initial positioning assembly for preliminary positioning, if there are already trays undergoing precise positioning or testing in the fine positioning area, it is necessary to prevent subsequent stacked trays from entering the fine positioning area and causing interference. At this time, the baffle cylinder 1142 drives the baffle plate 1141 to extend, blocking the front side of the stacked trays, thereby effectively preventing them from entering the fine positioning area.

[0050] As Figure 3 shown in the embodiment, the stack tray initial positioning assembly 112 includes a first initial positioning plate 1121, a second initial positioning plate 1122, and an initial positioning driving device 1123. The first initial positioning plate 1121 and the second initial positioning plate 1122 are respectively arranged on both sides of the feeding pull belt 111, and the initial positioning driving device 1123 is used to drive the first initial positioning plate 1121 and the second initial positioning plate 1122 to move closer to or farther away from each other.

[0051] As Figure 2 and Figure 3 shown, the initial positioning driving device 1123 includes a motor 1123a, a reversible screw rod 1123b, and a guide assembly 1123c. The first initial positioning plate 1121 and the second initial positioning plate 1122 are installed on the reversible screw rod 1123b. When the motor 1123a is started, it drives the reversible screw rod 1123b to rotate. The reversible screw rod 1123b is a special screw rod, and the rotation directions of the threads on both sides are opposite. When the reversible screw rod 1123b rotates, the first initial positioning plate 1121 and the second initial positioning plate 1122 installed on the screw rod will be subjected to the thrust of the threads. Because the rotation directions of the threads on both sides are opposite, the first initial positioning plate 1121 and the second initial positioning plate 1122 will be subjected to thrust in opposite directions, thereby realizing the action of moving closer to or farther away from each other. The setting of the guide assembly 1123c ensures the stability and accuracy of the first initial positioning plate 1121 and the second initial positioning plate 1122 during movement.

[0052] The specific working process is as follows: Before the stack tray is transported to the initial positioning area, the first initial positioning plate 1121 and the second initial positioning plate 1122 maintain a certain distance, so that the stack tray can pass smoothly. When the stack tray is transported to the initial positioning area, the initial positioning driving device 1123 starts to work. It drives the first initial positioning plate 1121 and the second initial positioning plate 1122 to move closer to each other, and preliminarily positions the lower side of the stack tray. This action ensures the stability and accuracy of the stack tray during transportation, and provides a basis for subsequent fine positioning. When the initial positioning assembly completes its task, the stack tray will continue to be transported to the fine positioning area for further positioning and testing. At this time, the initial positioning driving device 1123 drives the first initial positioning plate 1121 and the second initial positioning plate 1122 to move away from each other, so as to facilitate the entry of the next stack tray. Through the cooperation of the first initial positioning plate 1121 and the second initial positioning plate 1122, the stack tray is effectively preliminarily positioned during transportation. This ensures the stability and accuracy of the stack tray during subsequent processing, and improves the accuracy and efficiency of cell extraction and testing.

[0053] In view of the similarity in structure between the stack tray fine positioning device 113 and the stack tray initial positioning device, the main difference lies in that the stack tray fine positioning device 113 is for more accurate positioning of the entire stack tray, not just the lower side of the tray, so its working principle and components (such as motor 1123a, positive and negative threaded rod 1123b, guide assembly 1123c, and corresponding positioning plate) are logically similar, but differ in size, precision, and possible application force to adapt to the need for accurate positioning of the entire stack tray.

[0054] In short, the stack tray fine positioning device 113 adopts a similar structure and working principle to the initial positioning device, but targets the entire stack tray for higher precision and stability in positioning, ensuring accuracy in cell extraction and testing. Due to this similarity, the specific working principle and technical details of the stack tray fine positioning device 113 are not repeated here.

[0055] The tray lifting device 12 (not shown in the figure) includes a lifting rack, a lifting drive device, and a lifting guide device. When the stack tray is transported below the lifting positioning device, the lifting drive device begins to work. It generates a pushing force that is transmitted to the stack tray through the lifting rack, causing it to gradually rise. During the lifting process, the lifting guide device ensures the stability and accuracy of the lifting rack, preventing the tray from shifting or falling. When the stack tray rises to the designated position, the lifting drive device stops working, and the stack tray is accurately positioned at the required height and position, facilitating subsequent cell extraction and testing operations.

[0056] As shown in Figure 3 and Figure 4 In this embodiment, the tray positioning and separating device 13 includes a positioning and separating block 131 and a positioning and separating drive device 132. The separating block is installed on the positioning and separating drive device 132, and the positioning and separating drive device 132 is used to drive the separating block to approach or separate from the tray. The positioning and separating block 131 includes a positioning part 1311 and a separating part 1312. The positioning part 1311 is used to position the tray, and the separating part 1312 is used to separate the tray.

[0057] As shown in Figure 5 In one embodiment, the cell positioning mechanism 3 includes an X-axis positioning device 31, a Y-axis positioning device 32, and a positioning platform 33. The X-axis positioning device 31 and the Y-axis positioning device 32 are both installed on the positioning platform 33. The X-axis positioning device 31 is used to position the cell in the X-axis direction, and the Y-axis positioning device 32 is used to position the cell in the Y-axis direction.

[0058] As shown in Figure 5As shown, the X-axis positioning device 31 includes an X-axis positioning assembly 311 and an X-axis positioning fixed rod 312. The X-axis positioning assembly 311 includes an X-axis positioning push rod 3111, a buffer assembly 3112, a second horizontal movement seat 3113, and a second horizontal movement drive module 3114. The X-axis positioning fixed rod 312 is installed on the positioning platform 33. The X-axis positioning push rod 3111 is installed on the second horizontal movement seat 3113 through the buffer assembly 3112. The second horizontal movement drive module 3114 is used to drive the second horizontal movement seat 3113 to drive the X-axis positioning push rod 3111 to push the side edge of the battery cell close to the X-axis positioning fixed rod 312, so as to complete the positioning of the battery cell in the X direction. The buffer assembly 3112 plays an important protection role in the process of the push rod action, preventing the battery cell from being damaged due to excessive impact force.

[0059] As shown in Figure 5 The buffer assembly 3112 includes a buffer spring 3112a, a buffer sliding rail 3112b, and a limiting block 3112c. One end of the buffer spring 3112a abuts against the sliding block of the buffer sliding rail 3112b, and the other end abuts against the limiting block 3112c. The X-axis positioning push rod 3111 is installed on the sliding block of the buffer sliding rail 3112b.

[0060] As shown in Figure 5 The Y-axis positioning device 32 includes a Y-axis positioning push block 321, a Y-axis push frame, and a Y-axis push module. The Y-axis positioning push block 321 is installed on the Y-axis push frame. The Y-axis push module pushes the Y-axis push frame to drive the Y-axis positioning push block to move in the Y-axis direction.

[0061] As shown in Figure 6 The four sides of the rotating disc mechanism 4 are respectively provided with battery cell fixing assemblies 41. Each battery cell fixing assembly 41 includes four battery cell fixings 41, each of which is used to clamp one battery cell. The rotating disc mechanism 4 can be an automatic rotating disc equipped with a sensor, a driving motor 1123a, and a control system, which can realize precise rotation control and positioning. The automatic rotating disc is usually integrated with the battery cell fixing assembly 41 to realize automatic processing of the battery cell.

[0062] The battery cell fixing 41 can be a suction cup device.

[0063] As shown in Figure 7As shown, in the embodiment, the code scanning and temperature measuring mechanism 5 includes a code scanner 51, a temperature measuring instrument 52, a first horizontal moving seat 53, and a first horizontal moving drive module 54. The code scanner 51 and the temperature measuring instrument 52 are respectively installed on the first horizontal moving seat 53, and the first horizontal moving seat 53 is installed on the first horizontal moving drive module 54. The first horizontal moving drive module 54 is used to drive the code scanner 51 and the temperature measuring instrument 52 to move close to or away from the battery cell. Specifically, the code scanner 51 and the temperature measuring instrument 52 are respectively provided with two groups of installations on the first horizontal moving seat 53. The code scanner 51 and the temperature measuring instrument 52 are integrated into the same mechanism and can move synchronously through the first horizontal moving seat 53 and the first horizontal moving drive module 54. This integrated design reduces the space occupied by the equipment and improves the integration and automation level of the equipment. The code scanning and temperature measuring mechanism 5 can automatically move close to the battery cell to perform code scanning and temperature measuring operations without manual intervention, thereby simplifying the operation process and improving the work efficiency.

[0064] As shown in the drawings, Figure 8 As shown in one of the embodiments, the OCV detection mechanism 6 includes a mounting frame 61, a Z horizontal moving drive module 62, a probe mounting seat 63, a positive probe assembly 64, and a negative probe assembly 65. The positive probe assembly 64 and the negative probe assembly 65 are both installed on the probe mounting seat 63, and the probe mounting seat 63 is installed on the Z horizontal moving drive module 62. The Z horizontal moving drive module 62 is installed on the mounting frame 61, and the Z horizontal moving drive module 62 is used to drive the probe mounting seat 63 to move up and down with the positive probe assembly 64 and the negative probe assembly 65.

[0065] As shown in the drawings, Figure 8 As shown in one of the embodiments, the positive probe assembly 64 includes a positive mounting bottom plate 641, a positive mounting face plate 642, a first positive probe 643, and a second positive probe 644. The first positive probe 643 and the second positive probe 644 are arranged between the positive mounting bottom plate 641 and the positive mounting face plate 642. The positive mounting face plate 642 fixes the first positive probe 643 and the second positive probe 644 on the positive mounting bottom plate 641. The negative probe assembly 65 includes a negative mounting bottom plate 651, a negative mounting face plate 652, a first negative probe 653, and a second negative probe 654. The first negative probe 653 and the second negative probe 654 are arranged between the negative mounting bottom plate 651 and the negative mounting face plate 652. The negative mounting face plate 652 fixes the first negative probe 653 and the second negative probe 654 on the negative mounting bottom plate 651. The arrangement of the first positive probe 643, the second positive probe 644, the first negative probe 653, and the second negative probe 654 allows simultaneous connection and testing of multiple test points, thereby improving the testing efficiency.

[0066] As shown in the drawings, Figure 8As shown, the probe mounting seat 63 is provided with a guide groove 631, the bottom surface of the positive electrode mounting bottom plate 641 and the negative electrode mounting bottom plate 651 is respectively provided with a guide convex strip 632, the guide convex strip 632 cooperates with the guide groove 631, and the positive electrode mounting bottom plate 641 and the negative electrode mounting bottom plate 651 can move along the guide groove 631 through the guide convex strip 632. The guide groove 631 provided on the probe mounting seat 63 cooperates with the guide convex strip 632 provided on the bottom surface of the positive electrode mounting bottom plate 641 and the negative electrode mounting bottom plate 651, so that the positive electrode mounting bottom plate 641 and the negative electrode mounting bottom plate 651 can move smoothly along the guide groove 631. This design not only improves the adjustability of the probe assembly, but also ensures the stability and accuracy of the probe during movement.

[0067] As shown in the drawings, Figure 8 As shown, the bottom of the first negative electrode probe 653 and the second negative electrode probe 654 is provided with a plurality of needle tip parts 66. The bottom of the first negative electrode probe 653 and the second negative electrode probe 654 is provided with a plurality of needle tip parts 66, which increases the contact area between the probe and the test point, and improves the accuracy and stability of the test. At the same time, the plurality of needle tip parts 66 can also compensate for the decrease of test accuracy caused by probe wear to a certain extent.

[0068] As shown in the drawings, Figure 9 As shown, the battery cell NG unloading mechanism 8 includes an NG unloading manipulator 81, an NG unloading transfer station 82, a first NG material frame 83 and a second NG material frame 84. The battery cell passes through the OCV detection station on the production line, which is responsible for measuring the open circuit voltage of the battery cell to evaluate the performance of the battery cell. The measuring equipment automatically measures the OCV value of the battery cell and sends the data to the system. The system judges whether the battery cell is qualified according to the set standard. If the OCV value of the battery cell does not meet the preset standard, it is determined as an NG battery cell. When the system identifies the NG battery cell, it will send a signal to the battery cell NG unloading mechanism 8. The identification mechanism (such as a sensor or a visual identification system) in the unloading mechanism will confirm the position and state of the battery cell. The NG unloading manipulator 81 accurately grabs the NG battery cell according to the received signal and the information provided by the identification mechanism. The manipulator removes the NG battery cell from the production line and places it on the NG unloading transfer station 82 for temporary storage. According to the needs, the NG battery cells on the transfer station can be further classified, such as by NG type or battery cell specification. The classified battery cells are placed into the first NG material frame 83 or the second NG material frame 84 by the manipulator for subsequent processing and analysis.

[0069] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connect", "connection" should be construed broadlyly, for example, can be fixed connection, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0070] In the embodiments of the present application or the devices or elements implied by the embodiments of the present application must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0071] The terms "first", "second", "third", "fourth" and the like (if any) used in the description and claims of the embodiments of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in an order other than that illustrated or described herein. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features. The modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An automated testing machine for battery cell voltage and internal resistance based on stacked trays, characterized in that: It includes an automatic loading and unloading mechanism for stacked trays, a variable-pitch loading robot, a cell positioning mechanism, a turntable mechanism, a barcode scanning and temperature measurement mechanism, an OCV detection mechanism, a variable-pitch unloading robot, and a NG cell unloading mechanism; The automatic loading and unloading mechanism for stacked trays is used to transport the stacked trays to the cell loading position and to stack and unload the cells that have passed the test. The loading and variable-pitch handling robot is positioned between the stacking tray automatic loading and unloading mechanism and the cell positioning mechanism, and is used to acquire at least two cells in the tray and transfer them to the cell positioning mechanism with variable pitch. The battery cell positioning mechanism is used to simultaneously position multiple battery cells. After positioning, the loading variable-pitch handling robot transfers the battery cells to the turntable mechanism. The turntable mechanism is located on one side of the cell positioning mechanism and transfers the cell to the barcode scanning and temperature measurement mechanism. The scanning and temperature measurement mechanism is located on one side of the turntable mechanism and is used to simultaneously obtain the temperature of the battery cell and the information on the battery cell's QR code or barcode. Then, the turntable mechanism continues to transfer the battery cell to the OCV detection mechanism. The OCV detection mechanism is located on one side of the turntable mechanism and is used to perform OCV detection on multiple battery cells at the same time. Then the turntable mechanism continues to transfer the battery cells to the unloading variable pitch robot arm. The variable-pitch unloading robot is used to transfer at least two OK cells on the turntable mechanism to the empty tray of the stacking tray automatic loading and unloading mechanism, or to transfer NG cells to the NG cell unloading mechanism. The NG cell unloading mechanism unloads NG cells; the stacked tray automatic loading and unloading mechanism includes a tray feeding and positioning device, a tray lifting device, a tray positioning and separating device, an empty material CCD detection device, an empty tray transfer robot, and a tray discharge and positioning device. The tray feeding and positioning device is used to perform initial positioning and fine positioning of the stacked trays. The tray lifting device is located inside the tray feeding and positioning device and is used to lift the stacked trays. The tray positioning and separating devices are located on both sides of the tray feeding and positioning device and are used to position the topmost single tray and separate it from the trays of the next layer when the topmost tray is removed. The empty material CCD detection device is located above the tray feeding and positioning device and is used to detect whether there are cells in the topmost tray. The empty tray transfer robot is located between the tray feeding and positioning device and the tray discharge and positioning device. The empty tray transfer robot is used to transfer the empty trays at the tray feeding and positioning device to the tray discharge and positioning device. The tray discharge and positioning device is used to discharge the stacked trays. The material tray feeding and positioning device includes a feeding belt, a stacking tray initial positioning component, and a stacking tray fine positioning device. The feeding belt is used to transport the stacked material trays. The stacking tray initial positioning component is located on both sides of the feeding belt and is used to perform preliminary positioning on the lower side of the stacked material trays. The stacking tray fine positioning device is located on both sides of the feeding belt and is used to perform fine positioning on the entire stacked material tray. The stacking tray initial positioning assembly includes a first initial positioning plate, a second initial positioning plate, and an initial positioning drive device. The first initial positioning plate and the second initial positioning plate are respectively disposed on both sides of the feeding conveyor belt. The initial positioning drive device is used to drive the first initial positioning plate and the second initial positioning plate to move closer to each other or further away from each other. The tray positioning and separation device includes a positioning and separation block and a positioning and separation drive device. The positioning and separation block is mounted on the positioning and separation drive device, which is used to drive the positioning and separation block to move closer to or away from the tray.

2. The automated cell voltage and internal resistance testing machine based on stacked trays according to claim 1, characterized in that: The material tray feeding and positioning device also includes a material blocking component to prevent subsequent stacked material trays from entering the precision positioning area.

3. The automated cell voltage and internal resistance testing machine based on stacked trays according to claim 1, characterized in that: The battery cell positioning mechanism includes an X-axis positioning device, a Y-axis positioning device, and a positioning platform. Both the X-axis positioning device and the Y-axis positioning device are mounted on the positioning platform. The X-axis positioning device is used to position the battery cell in the X-axis direction, and the Y-axis positioning device is used to position the battery cell in the Y-axis direction.

4. The automated cell voltage and internal resistance testing machine based on stacked trays according to claim 1, characterized in that: The barcode scanning and temperature measurement mechanism includes a barcode scanner, a thermometer, a first transverse shifting base, and a first transverse shifting drive module. The barcode scanner and the thermometer are respectively mounted on the first transverse shifting base, and the first transverse shifting base is mounted on the first transverse shifting drive module. The first transverse shifting drive module is used to drive the barcode scanner and the thermometer to move closer to or away from the battery cell.

5. The automated cell voltage and internal resistance testing machine based on stacked trays according to claim 1, characterized in that: The OCV detection mechanism includes a mounting frame, a Z-axis lateral movement drive module, a probe mounting base, a positive probe assembly, and a negative probe assembly. The positive and negative probe assemblies are both mounted on the probe mounting base, which is mounted on the Z-axis lateral movement drive module. The Z-axis lateral movement drive module is mounted on the mounting frame. The Z-axis lateral movement drive module is used to drive the probe mounting base to move the positive and negative probe assemblies up and down.

6. The automated cell voltage and internal resistance testing machine based on stacked trays according to claim 5, characterized in that: The positive electrode probe assembly includes a positive electrode mounting base plate, a positive electrode mounting panel, a first positive electrode probe, and a second positive electrode probe. The first positive electrode probe and the second positive electrode probe are disposed between the positive electrode mounting base plate and the positive electrode mounting panel. The positive electrode mounting panel fixes the first positive electrode probe and the second positive electrode probe to the positive electrode mounting base plate. The negative electrode probe assembly includes a negative electrode mounting base plate, a negative electrode mounting panel, a first negative electrode probe, and a second negative electrode probe. The first negative electrode probe and the second negative electrode probe are disposed between the negative electrode mounting base plate and the negative electrode mounting panel. The negative electrode mounting panel fixes the first negative electrode probe and the second negative electrode probe to the negative electrode mounting base plate.

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