Automatic internal resistance testing equipment for polymer soft package battery

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to polymer soft package battery automatic internal resistance testing equipment which comprises an equipment bottom plate, a feeding mechanism, a cache mechanism, a discharging mechanism, a defective product discharging mechanism, a feeding robot, a rotating disc mechanism, a code scanning mechanism, a tab shaping mechanism, a voltage internal resistance testing mechanism and a discharging robot. Through the full-process automation modules integrating plastic uptake tray automatic feeding, CCD positioning, four-axis robot transferring, tab shaping, high-precision internal resistance testing and the like, the dependence on manual operation is thoroughly eliminated, and the detection efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lithium ion batteries, and particularly relates to a polymer soft package battery automatic internal resistance testing device. BACKGROUND

[0002] In the production and manufacturing process of the soft package lithium battery, the shell voltage test is a key process for detecting whether the battery has a leakage or self-discharge phenomenon. If the battery shell voltage is too high, it usually means that the battery has a serious self-discharge problem, and the battery has poor durability, which needs to be identified and removed in time in the production process. Therefore, the accuracy and efficiency of the shell voltage measurement directly affect the overall quality and production benefit of the battery product.

[0003] At present, the test of the shell voltage of the soft package battery in the industry still mainly relies on manual operation. The common implementation mode is that the operator uses a multimeter, contacts the positive electrode probe with the positive electrode lug of the battery, contacts the negative electrode probe with the edge of the aluminum plastic shell, and judges whether the voltage is normal by observing the instrument reading. This mode has the following obvious defects: first, the test efficiency is low, which is difficult to adapt to the rhythm of large-scale production; second, manual reading is easy to introduce subjective errors, resulting in unstable measurement results and high misjudgment rate; third, long-term repeated operation easily causes personnel fatigue, further affecting the test consistency.

[0004] In addition, some existing automatic test mechanisms use a probe pressing structure for measurement, but in actual application, the probe is easy to cause shell indentation or deformation when contacting the aluminum plastic shell, affecting the appearance quality of the battery; at the same time, if the probe and the shell surface are not in good contact, it will also cause unstable measurement signal, seriously affecting the test accuracy.

[0005] Therefore, it is urgent to develop a soft package battery shell voltage testing mechanism that can realize automation, high precision and non-destructive, to overcome the shortcomings of the prior art in production efficiency, measurement accuracy and product appearance protection. SUMMARY

[0006] The purpose of the present application is to provide a polymer soft package battery automatic internal resistance testing device to solve the technical problems existing in the prior art.

[0007] To achieve the above object, the present application provides the following technical scheme: a kind of polymer soft package battery automatic internal resistance testing equipment, including equipment bottom plate, feeding mechanism, buffer mechanism, discharging mechanism, defective product discharging mechanism, feeding robot, carousel mechanism, code scanning mechanism, tab shaping mechanism, voltage internal resistance testing mechanism and discharging robot;The feeding mechanism, buffer mechanism, discharging mechanism, defective product discharging mechanism, carousel mechanism are all installed on equipment bottom plate, the code scanning mechanism, tab shaping mechanism, voltage internal resistance testing mechanism are sequentially arranged along the circumference of carousel mechanism, the feeding robot is used to grab polymer battery in the feeding mechanism or buffer mechanism to carousel mechanism, and the discharging robot is used to sort the battery detected on carousel mechanism to discharging mechanism or defective product discharging mechanism.

[0008] Preferably, the feeding mechanism and the discharging mechanism are consistent in structure, and both include a tray carrier and a lifting module, the lifting module is drivingly connected with the tray carrier, for driving the tray carrier to ascend or descend along the vertical direction, to realize automatic feeding and discharging of the plastic suction tray.

[0009] Preferably, the buffer mechanism includes a buffer mechanism support, a carrier guide shaft and a row bar speed reducer, the carrier guide shaft is vertically installed on the buffer mechanism support, and the row bar speed reducer is drivingly connected with the tray carrier, for driving the tray carrier to slide along the carrier guide shaft, to realize temporary storage of the plastic suction tray.

[0010] Preferably, the feeding robot and the discharging robot are both four-axis robots, the execution end of the four-axis robot is provided with a suction pad support, at least two suction pad rods are installed on the suction pad support, and a suction pad for adsorbing the polymer battery is arranged at the end of the suction pad rod; a proximity sensor is further arranged on the suction pad support, for detecting whether the battery is adsorbed in place.

[0011] Preferably, the carousel mechanism includes a carousel bottom plate, a battery suction plate, an angle divider and a servo motor, the battery suction plate is installed on the carousel bottom plate through the angle divider, and the servo motor is drivingly connected with the angle divider, for driving the battery suction plate to rotate around the axis line of the angle divider; the carousel mechanism further includes a pneumatic slip ring, the pneumatic slip ring is communicated with the pneumatic element of the battery suction plate, for supplying gas for the holding action of the battery suction plate.

[0012] Preferably, the voltage internal resistance testing mechanism adopts alternating current impedance measurement technology, by applying an alternating current signal of 1 kHz to the polymer battery, and measuring the alternating voltage drop to calculate the internal resistance value of the battery; the voltage internal resistance testing mechanism further includes a high-precision signal amplifier, a filter and a lock-in amplifier module, for reducing measurement error, so that the internal resistance measurement error is controlled within 5%.

[0013] Preferably, an unsatisfactory material box is further included, which is arranged correspondingly with the unsatisfactory product discharging mechanism, and is used for collecting the polymer battery determined as unqualified by the voltage internal resistance testing mechanism; the unsatisfactory product discharging mechanism is further provided with an alarm module, which sends a prompt signal when the battery in the unsatisfactory material box reaches a preset capacity.

[0014] Preferably, the code scanning mechanism includes a front code scanning module and a back code scanning module, the front code scanning module is used for scanning the identification information on the front of the polymer battery, and the back code scanning module is used for scanning the identification information on the back of the battery; the code scanning mechanism is in communication connection with the control system of the equipment, and is used for uploading the code scanning information to the control system, so as to realize the whole life cycle tracing of the battery detection data.

[0015] Preferably, the tab shaping mechanism includes a shaping press head and a driving assembly, the driving assembly is in driving connection with the shaping press head, and is used for driving the shaping press head to move along the direction of approaching or moving away from the tab of the battery, so as to perform the flattening treatment on the tab of the polymer battery; the working surface of the shaping press head is provided with an elastic buffer layer, which is used for avoiding damaging the tab.

[0016] Preferably, a control system is further included, the control system is internally provided with an internal resistance aging prediction algorithm based on historical data and an intelligent sorting algorithm; the internal resistance aging prediction algorithm is used for monitoring the state of the battery in real time and providing early warning, and the intelligent sorting algorithm is used for controlling the discharging robot to sort the battery to the discharging mechanism or the unsatisfactory product discharging mechanism according to the detection result of the voltage internal resistance testing mechanism; the control system further supports a remote monitoring function, and the detection data is transmitted to a PC end or a cloud system in real time.

[0017] The polymer soft package battery automatic internal resistance testing equipment provided by the application effectively solves the core pain points existing in the traditional detection method and the existing equipment. By integrating the automatic feeding of the suction tray, the CCD positioning, the four-axis robot transfer, the tab shaping, the high-precision internal resistance testing and other full-process automation modules, the dependence on manual operation is completely eliminated, the detection efficiency is greatly improved, and the internal resistance measurement error is significantly reduced by means of the high-precision signal amplifier, the filter and the phase-locked amplification technology combined with the alternating current impedance measurement method, so as to meet the high-precision detection requirements of the polymer battery on the edge resistance and the edge voltage. In addition, the modular design is adapted to different types and specifications of batteries, and breaks through the limitation of poor compatibility of the existing equipment.

[0018] In addition, the device monitors the state of the battery cell in real time through the internal resistance aging prediction algorithm, cooperates with fault diagnosis and redundancy design, can identify abnormal internal resistance, short circuit and other problem battery cells in time and automatically sort to the defective material box, effectively reduces the safety hidden danger of subsequent production link, guarantees the consistency of battery pack monomer; support real-time upload of detection data and remote monitoring, realize the whole life cycle quality traceability of battery cell, and the structure design convenient to disassemble reduces the maintenance cost, prolongs the service life of the device, and provides strong support for the large-scale and high-quality production of lithium battery as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall schematic diagram of the present application; Figure 2 is the layout schematic diagram of the present application; Fig. 3 is a schematic diagram of the upper and lower tray mechanism of the present application; Figure 4 is a schematic diagram of the tray buffer mechanism of the present application; Fig. 5 is a schematic diagram of the robot upper and lower battery of the present application; Fig. 6 is a schematic diagram of the turntable of the present application; Fig. 7 is a schematic diagram of the tab shaping of the present application; Fig. 8 is a schematic diagram of the test mechanism of the present application. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be described in detail below in combination with the preferred embodiments and the accompanying drawings.

[0021] The polymer soft package battery automatic internal resistance test device of the present embodiment takes the device bottom plate 1 as the installation reference, and all functional modules are integrated on the bottom plate, ensuring that the overall structure of the device is stable and the running precision is controllable. The assembly position and connection relationship of each module are as follows: The feeding mechanism 2, the buffer mechanism 3, the discharging mechanism 4, and the defective product discharging mechanism 5 are arranged along the edge of the device bottom plate 1 in turn, forming a process closed loop of “feeding - buffering - testing - sorting - discharging”; the turntable mechanism 7 is located in the center area of the device bottom plate 1, serving as the core carrier of the battery cell circulation; the code scanning mechanism 9, the tab shaping mechanism 10, and the voltage internal resistance test mechanism 11 are arranged along the circumference of the turntable mechanism 7 in clockwise direction in turn, and the central angle of adjacent modules is 120°, which is suitable for the indexing rotation requirement of the turntable mechanism 7.

[0022] Robot and auxiliary module assembly: The loading robot 6 is installed between the loading mechanism 2 and the turntable mechanism 7, and its activity radius covers the tray carrier 15 of the loading mechanism 2, the tray carrier 3 of the buffer mechanism 3, and the battery suction plate 72 of the turntable mechanism 7; the unloading robot 13 is installed between the turntable mechanism 7 and the unloading mechanism 4, and its activity radius covers the battery suction plate 72 of the turntable mechanism 7, the tray carrier 15 of the unloading mechanism 4, and the defective material box 8, 12 corresponding to the defective material box 8, 12 of the defective material box 8, 12; The defective material box 8, 12 is two independent boxes, respectively fixed on both sides of the defective material box 5, used for classified collection of "internal resistance exceeds" and "tab abnormality" two types of unqualified battery.

[0023] The loading mechanism 2 and the unloading mechanism 4 are completely consistent in structure, both taking "lifting module 25 + tray carrier 15" as the core, adapting to the built-in polymer battery of plastic suction tray, each tray containing 20, and the automatic transfer of battery spacing 15mm: Structural details: The lifting module 25 adopts ball screw transmission driven by stepper motor, and the positioning accuracy can reach ±0.1mm; The tray carrier 15 is a rectangular frame structure, and the inner side is provided with four guide blocks matched with the edge of the plastic suction tray to prevent the tray from shifting; The bottom of the carrier is provided with a pressure sensor for detecting whether the tray is placed in place.

[0024] Work flow (taking loading as an example): The worker places the plastic suction tray filled with polymer battery on the tray carrier 15, and the pressure sensor triggers the signal and feeds back to the control system; The control system controls the lifting module 25 to drive the tray carrier 15 to rise until the uppermost layer of the tray is aligned with the height of the suction cup of the loading robot 6 (the initial alignment height can be preset by the control system); After grabbing 1 layer of battery, the lifting module 25 automatically rises by 1 layer of battery thickness (such as 5mm), until the tray is empty; The empty tray is lowered to the initial position by the lifting module 25, and is manually or automatically transferred to the unloading mechanism 4 for reuse (the unloading mechanism works in the opposite direction, which is used to receive the battery tray after detection).

[0025] The buffer mechanism 3 is used for temporary storage of plastic suction tray to avoid equipment downtime caused by insufficient replenishment of the loading mechanism 2, and its structure includes buffer mechanism support 25, carrier guide shaft 4, row rod reducer 13 and tray carrier 3: The buffer mechanism support 25 is an aluminum profile welded frame with a height of 2 m and can accommodate 5 layers of blister trays at the same time. The carrier guide shaft 4 is a 4-light shaft fixed vertically at the four corners of the support and is in clearance fit (clearance 0.05 mm) with the guide hole of the tray carrier 3, so as to ensure the stable lifting of the carrier. The rack rod speed reducer 13 is a worm gear speed reducer, the output shaft of which is connected with a synchronous belt, the synchronous belt drives the tray carrier 3 to slide along the guide shaft, and the lifting speed is adjustable (0.1-0.3 m / s).

[0026] Workflow: When the tray of the feeding mechanism (2) is about to be empty, the control system triggers the buffer mechanism 3 to work, and the rack rod speed reducer 13 drives the tray carrier 3 to descend to the height aligned with the feeding mechanism 2, and then the full tray is transferred to the tray carrier 15 of the feeding mechanism 2, and then it is reset to wait for the next replenishment.

[0027] The feeding robot 6 and the discharging robot 13 both adopt a four-axis robot 239, which has X / Y / Z axis translation and Z-axis rotation functions, and the repeat positioning accuracy is ±0.05 mm, which is suitable for accurate grabbing and transferring of the battery cell: Execution end structure: The suction cup support 293 is an L-shaped aluminum alloy plate with a length of 200 mm and a width of 80 mm. The suction cup rod 294 is four stainless steel rods with a diameter of 8 mm and a length of 50 mm, which are evenly distributed on the suction cup support 293 (spacing 40 mm). The end is equipped with a silica gel suction cup (diameter 12 mm, vacuum degree -80 kPa), which can grab 4 battery cells at a time. The proximity sensor 309 is a diffuse reflection type photoelectric sensor fixed at the center of the suction cup support 293, with a detection distance of 5 mm, which is used to confirm whether the battery cell is successfully adsorbed (trigger alarm when there is no battery cell).

[0028] Workflow (taking the feeding robot as an example): After the control system receives the "tray in place" signal of the feeding mechanism 2, the four-axis robot 239 is driven to move above the tray; The suction cup is lowered to contact the battery cell, the vacuum system is started, the suction cup adsorbs the battery cell, and the proximity sensor 309 detects the battery cell, then the robot drives the battery cell to rise and rotate 90° (adapt to the placing direction of the turntable mechanism 7); The robot moves above the battery suction plate 72 of the turntable mechanism 7, places the battery cell in the positioning groove of the suction plate, releases the vacuum, and completes the feeding; The working process of the discharging robot 13 is opposite, and according to the detection result, the qualified battery cell is transferred to the tray of the discharging mechanism 4, and the unqualified battery cell is transferred to the defective material box 8, 12.

[0029] The rotating disc mechanism 7 is the core of the flow of the battery cell, and realizes the continuous process of "scanning code - shaping - testing". The structure thereof comprises a rotating disc bottom plate 71, a battery suction plate 72, an angle divider 73, a servo motor 74 and a pneumatic slip ring 75. Structural details: the rotating disc bottom plate 71 is a circular steel plate (diameter 800mm, thickness 20mm), and the bottom is fixed to the equipment bottom plate 1 through three supporting columns; the battery suction plate 72 is three fan-shaped aluminum plates (each with a central angle of 120°), and the surface is provided with a positioning groove (groove depth 2mm, tolerance ±0.05mm) matched with the battery cell, and a vacuum suction hole (diameter 2mm) is arranged at the bottom of the groove for suction and fixation of the battery cell; the angle divider 73 is a cam type divider, and the indexing accuracy is ±30", and the output shaft is connected with the center of the rotating disc bottom plate 71; the servo motor 74 is a 1.5kW servo motor, which is connected with the input shaft of the angle divider 73 through a shaft coupling, and the rotating speed is adjustable at 5-10r / min; the pneumatic slip ring 75 is installed at the center of the output shaft of the angle divider 73, one end of which is communicated with the vacuum interface of the battery suction plate 72, and the other end is connected with the vacuum system of the equipment, so as to ensure that the vacuum is not interrupted when the rotating disc rotates.

[0030] Workflow: The servo motor 74 drives the angle divider 73 to rotate, and drives the rotating disc bottom plate 71 and the battery suction plate 72 to rotate by indexing (each time 120°, pause 5s, and the pause time can be preset); When the battery suction plate 72 rotates to the scanning code mechanism 9 station, it is paused and the battery cell is adsorbed, and the scanning code is completed; when it rotates to the tab shaping mechanism 10 station, it is paused and cooperates with the shaping; when it rotates to the voltage and resistance testing mechanism 11 station, it is paused and the detection is completed; After the detection is completed, the rotating disc rotates to the discharging station, the battery suction plate 72 releases the vacuum, the battery cell is grabbed by the discharging robot 13, and the flow is completed.

[0031] The scanning code mechanism 9 is used for collecting the identification information of the battery cell, realizing the traceability of the detection data, and comprising a front scanning code module and a back scanning code module. Structural details: the front scanning code module is an industrial scanning code gun (resolution 1280x800, scanning code distance 100mm) fixed above the rotating disc mechanism 7, and the lens is vertically downward and is aligned with the front of the battery cell on the battery suction plate 72 (the side on which the two-dimensional code / bar code is printed); the back scanning code module is an industrial scanning code gun fixed below the rotating disc mechanism 7, and the lens is vertically upward and is aligned with the back of the battery cell (the back is upward when the battery cell is flipped by the feeding robot); both scanning code modules communicate with the control system through an RS485 interface, and the scanning code response time is ≤100ms.

[0032] Workflow: When the battery cell rotates to the barcode scanning station and stops, the front barcode scanning module first scans the front marking of the battery cell. If the scan is successful, the data is uploaded to the control system. If it fails, the back barcode scanning module starts scanning (applicable to cases where the front marking is worn). If both scans fail, the control system determines that the marking is abnormal and triggers the unloading robot to sort the battery cell into the defective material box 12.

[0033] The tab shaping mechanism 10 is used to flatten the tabs of the polymer battery cell (to prevent the tabs from bending and causing poor detection contact). Its core is a "shaping pressure head + drive assembly". Structural details: The shaping head is made of brass (hardness HRC30), with an arc-shaped working surface (radius 10mm) and a 0.5mm thick fluororubber elastic buffer layer (to prevent scratching the tabs); the drive component is a cylinder (cylinder diameter 20mm, stroke 30mm), which is fixed to the side of the turntable mechanism 7 by a bracket. The cylinder piston rod is connected to the shaping head, and the working air pressure is 0.4-0.6MPa (which can be adjusted by a pressure regulating valve).

[0034] Work process: When the battery cell rotates to the shaping station with the turntable and stops, the cylinder drives the shaping head to move towards the tab until the buffer layer contacts the tab and applies a pressure of 0.5 kg (the pressure is controlled by air pressure). After holding for 1 second, the cylinder resets, completing the tab flattening process.

[0035] The voltage and internal resistance testing mechanism 11 is the core detection module, enabling high-precision measurement of internal resistance and voltage, and employing AC impedance measurement technology. Structural details: Signal generation unit: Outputs a 1kHz sinusoidal AC signal with an amplitude of 50mV (RMS) and a signal distortion of ≤0.1%; Acquisition Unit: Includes a high-precision signal amplifier (100x gain, 10MΩ input impedance), a low-pass filter (10kHz cutoff frequency, 80dB attenuation rate / decimal), and a lock-in amplifier module (signal-to-noise ratio ≥80dB), used to extract weak AC voltage drop signals; Test probe: It has a dual probe structure (5mm spacing, probe material is beryllium copper, surface is gold plated), driven by a linear module, and can accurately contact the "side resistance area" of the cell tab (the connection part between the tab and the cell body). Calibration unit: Built-in three standard resistors of 10mΩ, 100mΩ and 1Ω, which are automatically calibrated when the device is turned on to ensure that the measurement error is ≤5%.

[0036] Workflow: The battery cell stops at the test station along with the turntable, and the linear module drives the test probe to contact the electrode tabs. The signal generation unit applies a 1kHz AC signal to the battery cell, and the acquisition unit measures the AC voltage drop across the tabs. The control system calculates the internal resistance (R=U / I) according to Ohm's Law, and simultaneously measures the open-circuit voltage of the battery cell (accuracy ±1mV). The test data is compared with preset thresholds (such as internal resistance ≤50mΩ, voltage 3.6-3.7V) to determine whether the battery cell is qualified or unqualified, and the results are uploaded to the control system.

[0037] The control system is the "brain" of the equipment, integrating data processing, motion control, and remote monitoring functions. Hardware configuration: It adopts a PLC (Siemens S7-1200) as the main controller, with a 10.1-inch touch screen (for parameter setting and status display), and an 8GB storage module (for storing test data, which can save 1 year of data). The complete workflow of the automated internal resistance testing equipment for polymer soft-pack batteries in this embodiment is as follows: the testing cycle for a single cell is ≤10s, and the testing capacity can reach 360 cells per hour, meeting the needs of large-scale production: Material feeding stage: The blister tray filled with battery cells is lifted by the feeding mechanism 2, the feeding robot 6 grabs the battery cells, flips them over to complete the reverse side scanning, and then transfers them to the battery suction plate 72 of the turntable mechanism 7. The circulation and pre-processing stage: The turntable mechanism rotates at 7 degrees, driving the battery cells to pass through the front scanning mechanism (scanning mechanism 9, electrode shaping mechanism 10) in sequence to complete information collection and electrode pre-processing. Testing phase: The battery cell is transferred to the voltage and internal resistance testing mechanism 11 to complete the internal resistance and voltage measurement, and the test results are uploaded to the control system; Sorting and unloading stage: The turntable transfers the inspected battery cells to the unloading station. The unloading robot 13 places the qualified battery cells into the tray of the unloading mechanism 4 according to the judgment result of the control system, and puts the unqualified battery cells into the corresponding defective boxes 8 and 12. Material replenishment and buffering stage: When the tray of feeding mechanism 2 is empty, buffering mechanism 3 automatically replenishes the material; when defective material boxes 8 and 12 are full (detected by infrared sensors), the alarm module issues an audible and visual alarm to remind manual cleaning.

[0038] For those skilled in the art, various improvements and modifications can be made without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. An automatic internal resistance testing device for polymer soft-pack batteries, characterized in that, The equipment includes a base plate (1), a feeding mechanism (2), a buffer mechanism (3), a discharging mechanism (4), a defective product discharging mechanism (5), a feeding robot (6), a turntable mechanism (7), a barcode scanning mechanism (9), a tab shaping mechanism (10), a voltage internal resistance testing mechanism (11), and a discharging robot (13). The feeding mechanism (2), buffer mechanism (3), discharging mechanism (4), defective product discharging mechanism (5), and turntable mechanism (7) are all installed on the base plate (1). The barcode scanning mechanism (9), tab shaping mechanism (10), and voltage internal resistance testing mechanism (11) are arranged sequentially along the circumference of the turntable mechanism (7). The feeding robot (6) is used to pick up the polymer cells in the feeding mechanism (2) or buffer mechanism (3) and transfer them to the turntable mechanism (7). The discharging robot (13) is used to sort the cells that have been tested on the turntable mechanism (7) to the discharging mechanism (4) or defective product discharging mechanism (5).

2. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The loading mechanism (2) and unloading mechanism (4) have the same structure, both including a pallet carrier (15) and a lifting module (25). The lifting module (25) is driven to connect with the pallet carrier (15) and is used to drive the pallet carrier (15) to rise and fall in the vertical direction, so as to realize the automatic loading and unloading of the blister tray.

3. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The buffer mechanism (3) includes a buffer mechanism bracket (25), a carrier guide shaft (4) and a rod reducer (13). The carrier guide shaft (4) is vertically mounted on the buffer mechanism bracket (25). The rod reducer (13) is driven to connect with the pallet carrier (3) and is used to drive the pallet carrier (3) to slide along the carrier guide shaft (4) to achieve temporary storage of the blister tray.

4. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, Both the loading robot (6) and the unloading robot (13) are four-axis robots (239). The execution end of the four-axis robot (239) is provided with a suction cup bracket (293). At least two suction cup rods (294) are installed on the suction cup bracket (293). The ends of the suction cup rods (294) are provided with suction cups for adsorbing polymer cells. The suction cup bracket (293) is also provided with a proximity sensor (309) for detecting whether the cell is adsorbed in place.

5. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The turntable mechanism (7) includes a turntable base plate (71), a battery suction plate (72), an angle divider (73), and a servo motor (74). The battery suction plate (72) is mounted on the turntable base plate (71) through the angle divider (73). The servo motor (74) is driven by the angle divider (73) and is used to drive the battery suction plate (72) to rotate around the axis of the angle divider (73). The turntable mechanism (7) also includes a pneumatic slip ring (75), which is connected to the pneumatic components of the battery suction plate (72) and is used to supply air for the suction action of the battery suction plate (72).

6. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The voltage internal resistance testing mechanism (11) adopts AC impedance measurement technology. It calculates the internal resistance value of the cell by applying a 1kHz AC signal to the polymer cell and measuring the AC voltage drop. The voltage internal resistance testing mechanism (11) also includes a high-precision signal amplifier, filter and lock-in amplifier module to reduce measurement error and control the internal resistance measurement error within 5%.

7. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, It also includes defective material boxes (8, 12), which are set in correspondence with the defective product unloading mechanism (5) to collect polymer cells that are determined to be unqualified by the voltage internal resistance testing mechanism (11); the defective product unloading mechanism (5) is also equipped with an alarm module, which issues a prompt signal when the cell in the defective material box (8, 12) reaches the preset capacity.

8. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The scanning mechanism (9) includes a front scanning module and a back scanning module. The front scanning module is used to scan the marking information on the front of the polymer cell, and the back scanning module is used to scan the marking information on the back of the cell. The scanning mechanism (9) is connected to the control system of the equipment and is used to upload the scanning information to the control system to realize the full life cycle traceability of the cell testing data.

9. The automatic internal resistance testing equipment for polymer soft-pack batteries according to claim 1, characterized in that, The tab shaping mechanism (10) includes a shaping head and a driving assembly. The driving assembly is connected to the shaping head and is used to drive the shaping head to move in a direction close to or away from the battery cell tab in order to flatten the tab of the polymer battery cell. The working surface of the shaping head is provided with an elastic buffer layer to avoid damaging the tab.

10. The automatic internal resistance testing equipment for polymer soft-pack batteries according to any one of claims 1-9, characterized in that, It also includes a control system, which has a built-in internal resistance aging prediction algorithm and an intelligent sorting algorithm based on historical data; the internal resistance aging prediction algorithm is used to monitor the cell status in real time and provide early warnings, and the intelligent sorting algorithm is used to control the unloading robot (13) to sort the cells to the unloading mechanism (4) or the defective product unloading mechanism (5) according to the detection results of the voltage internal resistance testing mechanism (11); the control system also supports remote monitoring function, and transmits the detection data to the PC or cloud system in real time.

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