A battery testing device

Abstract

The utility model relates to battery test technical field, concretely provides a kind of battery testing device, comprising: probe mechanism;Probe mechanism includes: probe module, and adjusting mechanism;Probe mechanism is movable relative to the battery to be tested;Adjusting mechanism, including first synchronous belt, and first pulley and second pulley;First synchronous belt is installed on first pulley and second pulley;First synchronous belt includes first part and second part, and first part is the part of first synchronous belt in the first side of first pulley and second pulley;Second part is the part of first synchronous belt in the second side of first pulley and second pulley;The movement direction of first part and second part is opposite;Positive probe module is set on first part, and negative probe module is set on second part, to solve the problem of slow change efficiency and low detection efficiency in battery detection in relevant technology.

Description

Technical Field

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

[0002] During battery production, it is typically necessary to evaluate the battery's state of charge and the activity of electrode materials to screen out substandard batteries and maintain battery consistency. OCV (Open Circuit Voltage) testing is a crucial part of battery testing.

[0003] Existing OCV testing equipment typically uses test probes to perform OCV detection on batteries. These probes are usually fixed or can only be adjusted manually. When applied to mixed-line production processes, changing the model of the battery to be tested requires manual adjustment of the probe position, significantly impacting both changeover efficiency and battery testing efficiency. Utility Model Content

[0004] The present invention provides a battery testing device that at least solves the problems of slow battery testing efficiency and low testing efficiency.

[0005] To achieve the above objectives, this utility model provides a battery testing device, comprising: a probe mechanism; the probe mechanism includes: a probe module and an adjustment mechanism; the probe mechanism is movable relative to the battery to be tested; the probe module includes a positive electrode probe module and a negative electrode probe module; the adjustment mechanism includes a first synchronous belt, a first pulley, and a second pulley; the first synchronous belt is mounted on the first pulley and the second pulley; the first synchronous belt includes a first portion and a second portion, the first portion being the portion of the first synchronous belt on a first side of the first pulley and the second pulley, the first side being one side in a first direction; the second portion being the portion of the first synchronous belt on a second side of the first pulley and the second pulley, the second side being a second side opposite to the first side in a first direction; the first portion and the second portion move in opposite directions; the positive electrode probe module is disposed on the first portion, and the negative electrode probe module is disposed on the second portion.

[0006] As an optional solution, it further includes: a support frame for mounting the adjustment mechanism; a first shaft of the first pulley mounted on the support frame via a first bearing; and a second shaft of the second pulley mounted on the support frame via a second bearing.

[0007] As an optional solution, it further includes: both the first pulley and the second pulley are gears, the first synchronous belt is a toothed belt, and the side of the first synchronous belt that contacts the first pulley is provided with meshing teeth; the first synchronous belt is meshed with both the first pulley and the second pulley.

[0008] As an optional solution, it also includes: a motor, mounted on the support frame, the output shaft of the motor being drivenly connected to the first pulley.

[0009] As an optional solution, it further includes: a main transmission mechanism; the main transmission mechanism includes: a first transmission wheel, disposed on the output shaft of the motor, the motor being fixed on one side of the first mounting platform, and the other side of the first mounting platform being configured to mount the first pulley; a second transmission wheel, disposed on the first rotating shaft, the second transmission wheel being located on the third side of the first pulley in a second direction, the second direction being the axial direction of the first rotating shaft; and a transmission belt, mounted on the first transmission wheel and the second transmission wheel.

[0010] As an optional solution, it further includes: an auxiliary adjustment mechanism; the auxiliary adjustment mechanism is disposed opposite to the adjustment mechanism, and the auxiliary adjustment mechanism includes: a third pulley disposed on the first rotating shaft; a fourth pulley disposed on the second rotating shaft; a second synchronous belt mounted on the third pulley and the fourth pulley; the second synchronous belt includes a third part and a fourth part; the third part is the portion of the second synchronous belt on the first side of the third pulley and the fourth pulley, and the fourth part is the portion of the second synchronous belt on the second side of the third pulley and the fourth pulley; the third part and the fourth part move in opposite directions; the positive electrode probe module is fixedly connected to the first part and the third part; the negative electrode probe module is fixedly connected to the second part and the fourth part.

[0011] As an optional solution, it further includes: a tray disposed on the support frame, the battery being disposed on the tray; the adjustment mechanism moving relative to the tray in the first direction.

[0012] As an optional solution, the probe module is provided in multiple groups along a third direction; the third direction is the movement direction of the first synchronous belt; the number of probe modules is equal to the number of groups of the battery to be tested.

[0013] As an optional solution, the positive electrode probe module includes: a first movable frame, fixedly connected to a first portion of the first synchronous belt; the first movable frame has at least one first mounting hole on the side away from the first synchronous belt; and a casing pressure probe, disposed in each of the first mounting holes, for contacting and conducting with the positive electrode of each of the batteries.

[0014] As an optional solution, the negative electrode probe module includes: a second movable frame, fixedly connected to a second portion of the first synchronous belt; at least one second mounting hole is provided on the side of the second movable frame away from the first synchronous belt, the positions of the second mounting holes correspond one-to-one with the positions of the first mounting holes, and the line connecting the second mounting hole and the corresponding first mounting hole is parallel to the third direction; a temperature probe is disposed in each of the second mounting holes for contacting and conducting with the negative electrode of the battery.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects: the positive electrode probe module and the negative electrode probe module of the probe module are respectively fixed on the first part and the second part of the first synchronous belt. The first synchronous belt is installed on the first belt and the second pulley. Since the first synchronous belt is a closed ring structure, when the first pulley and the second pulley rotate, the movement directions of the first part and the second part must be completely opposite. For example, when the first part moves to the left, the second part moves to the right. This enables the positive electrode probe module and the negative electrode probe module fixed on the first part and the second part to move closer or further away synchronously, thereby accurately adjusting the distance between the two probes so that the probes contact the battery for OCV testing. This solves the problem of slow changeover efficiency and low testing efficiency during battery testing, thereby achieving the technical effect of improving changeover time, reducing manpower input, and achieving high-efficiency testing. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a battery testing device according to an embodiment of the present invention, taken from a first angle.

[0018] Figure 2 This is a three-dimensional structural diagram of the battery testing device according to an embodiment of the present invention from a second angle.

[0019] Figure 3 This is a top view schematic diagram of a battery testing device according to an embodiment of this utility model.

[0020] Figure 4 This is a side view schematic diagram of a battery testing device according to an embodiment of the present invention.

[0021] Figure 5 This is a battery testing device according to an embodiment of the present invention. Figure 1 A magnified view of the structure at point A in the diagram.

[0022] Figure 6 This is a battery testing device according to an embodiment of the present invention. Figure 1 A magnified view of the structure at point B in the diagram.

[0023] Figure reference numerals:

[0024] 1. Probe module; 11. Positive electrode probe module; 111. First moving frame; 112. Case pressure probe; 12. Negative electrode probe module; 121. Second moving frame; 122. Temperature probe;

[0025] 2. Adjustment mechanism; 21. First synchronous belt; 211. First part; 212. Second part; 22. First pulley; 23. Second pulley; 24. First shaft; 25. Second shaft;

[0026] 3. Support frame;

[0027] 4. Pallet;

[0028] 5. Battery;

[0029] 6. Electric motor;

[0030] 7. Main transmission mechanism; 71. First transmission wheel; 72. Second transmission wheel; 73. Transmission belt;

[0031] 8. Auxiliary adjustment mechanism; 81. Third pulley; 82. Fourth pulley; 83. Second synchronous belt. Detailed Implementation

[0032] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0033] During battery production, it is typically necessary to evaluate the battery's state of charge and the activity of electrode materials to screen out substandard batteries and maintain battery consistency. OCV (Open Circuit Voltage) testing is a crucial part of battery testing.

[0034] OCV testing is primarily used to determine the state of charge (SOC) and state of health. SOC refers to the percentage of remaining battery capacity, while state of health refers to the degree of capacity degradation. An abnormally low OCV reading may indicate a short circuit, bulging, or loss of active material from the battery.

[0035] Existing OCV testing equipment typically uses test probes to perform OCV detection on batteries. These probes are usually fixed or can only be adjusted manually. When applied to mixed-line production processes, changing the model of the battery to be tested requires manual adjustment of the probe position, significantly impacting both changeover efficiency and battery testing efficiency.

[0036] To address the aforementioned problems, this invention provides a battery testing device that solves the issues of slow battery testing efficiency and low testing efficiency.

[0037] See Figures 1 to 6 As shown, this utility model provides a battery testing device, including: a probe mechanism; the probe mechanism includes: a probe module 1 and an adjustment mechanism 2; the probe mechanism is movable relative to the battery 5 to be tested; the probe module 1 includes a positive electrode probe module 11 and a negative electrode probe module 12; the adjustment mechanism 2 includes a first synchronous belt 21, a first pulley 22 and a second pulley 23; the first synchronous belt 21 is mounted on the first pulley 22 and the second pulley 23; the first synchronous belt 21 includes a first part 211 and a second part 212; the first part 211 is the portion of the first synchronous belt 21 on a first side of the first pulley 22 and the second pulley 23, the first side being one side in a first direction; the second part 212 is the portion of the first synchronous belt 21 on a second side of the first pulley 22 and the second pulley 23, the second side being a second side opposite to the first side in the first direction; the first part 211 and the second part 212 move in opposite directions; the positive electrode probe module 11 is disposed on the first part 211, and the negative electrode probe module 12 is disposed on the second part 212.

[0038] The probe mechanism includes a probe module 1 and an adjustment mechanism 2. The probe mechanism adjusts the spacing of the probe module 1 through the first synchronous belt 21 in the adjustment mechanism 2 so that the probe module 1 is adapted to the width of the positive and negative electrodes of the battery 5, and is used to perform OCV testing on the battery.

[0039] The adjustment mechanism 2 includes a first synchronous belt, a first pulley, and a second pulley. The movement of the first synchronous belt 21 drives the positive electrode probe module 11 and the negative electrode probe module 12 to move closer or further away synchronously, thereby achieving the adaptation of the probe mechanism to the width of the positive and negative electrodes of the battery 5.

[0040] The probe module 1 includes a positive probe module 11 and a negative probe module 12, which are respectively fixed on the first part 211 and the second part 212 of the first synchronous belt 21. Therefore, they will move synchronously in opposite directions as the first synchronous belt 21 rotates, that is, the positive probe module 11 and the negative probe module 12 move closer or further away at the same time, thereby precisely adjusting the distance between the two probes.

[0041] The positive electrode probe module 11 and the negative electrode probe module 12 are driven by the first synchronous belt 21 to achieve synchronous reverse movement. This eliminates the need for separate calibration of the two probes, ensuring precise synchronization of the spacing adjustment. For example, to adjust the spacing from 20mm to 30mm, the positive electrode probe module 11 moves 5mm to the left and the negative electrode probe module 12 moves 5mm to the right, completing the adjustment synchronously. This significantly reduces adjustment time and operational errors, improving the efficiency of battery OCV detection.

[0042] The first synchronous belt 21 of the adjusting mechanism 2 includes a first part 211 and a second part 212, which are located on both sides of the first pulley 22 and the second pulley 23 in the first direction, respectively.

[0043] A spatial rectangular coordinate system is constructed with the direction of motion of the first synchronous belt 21 as the x-axis, the axial direction of the first pulley 22 as the y-axis, and the direction perpendicular to the x-axis and y-axis as the z-axis.

[0044] The first direction is the z-axis direction, and the first side and the second side are opposite sides of the first direction, that is, the positive and negative directions of the z-axis. The first part 211 is on the first side, which is the upper half of the first synchronous belt 21; the second part 212 is on the second side, which is the lower half of the first synchronous belt 21.

[0045] Since the first synchronous belt 21 is a closed loop structure, when the first pulley 22 and the second pulley 23 rotate, the movement directions of the first part 211 and the second part 212 will be completely opposite. For example, when the first part 211 moves to the left, the second part 212 moves to the right, thereby realizing that the positive electrode probe module 11 and the negative electrode probe module 12, which are respectively fixed in the first part 211 and the second part 212, move closer or further away synchronously.

[0046] The rotation of the first pulley 22 and the second pulley 23 requires only one power source, namely a single motor 6, to drive the first pulley 22 or the second pulley 23 to achieve synchronous reverse movement of the two probes. This eliminates the need for two independent power units and complex synchronization control circuits, reducing the complexity of the mechanical structure and control system, while also reducing equipment costs and maintenance difficulty.

[0047] During OCV testing, after the distance between the positive electrode probe module 11 and the negative electrode probe module 12 is adjusted to match the distance between the positive and negative electrodes of the battery 5 to be tested, the entire probe mechanism moves closer to the battery 5, so that the positive electrode probe module 11 and the negative electrode probe module 12 contact the positive and negative electrodes of the battery 5 respectively, and the OCV test is started.

[0048] The travel design of the first synchronous belt 21 can flexibly cover the positive and negative electrode spacing of batteries 5 of different sizes, such as small button batteries 5 of 10mm to large power batteries 5 of 100mm. Different test batteries 5 can be quickly adapted by controlling the rotation of the first pulley 22 or the second pulley 23 with a single power knob or button, thus improving the versatility of the equipment.

[0049] The first synchronous belt 21 may become loose after long-term use, which will increase the error in the adjustment of the probe spacing. A tensioning wheel can be added to adjust the tension of the first synchronous belt 21. At the same time, scale marks or grating rulers can be added to the first synchronous belt 21, and with the encoder, the spacing can be digitally controlled precisely.

[0050] If the impact force is too great when the probe contacts the battery 5, it may damage the battery 5 tabs or the probe tip. A spring buffer structure can be added inside the probe module 1. Using gold-plated or beryllium copper probe tips can reduce contact resistance and reduce signal loss during OCV testing.

[0051] In summary, the above-mentioned technical solution of this utility model uses the positive electrode probe module 11 and the negative electrode probe module 12 of the probe module 1, respectively fixed on the first part 211 and the second part 212 of the first synchronous belt 21, to perform OCV testing on the battery 5, thereby achieving efficient testing of the battery 5 without the need for manual intervention.

[0052] Specifically, the first synchronous belt 21 is installed on the first belt and the second pulley 23. Since the first synchronous belt 21 is a closed loop structure, when the first pulley 22 and the second pulley 23 rotate, the movement directions of the first part 211 and the second part 212 will be completely opposite. For example, when the first part 211 moves to the left, the second part 212 moves to the right, thereby realizing that the positive electrode probe module 11 and the negative electrode probe module 12, which are respectively fixed in the first part 211 and the second part 212, move closer or further away synchronously.

[0053] This allows for precise adjustment of the distance between the two probes, enabling the probes to contact the battery 5 for OCV testing. This solves the problems of slow changeover efficiency and low testing efficiency during battery 5 testing, thereby achieving the technical effects of improving changeover time, reducing manpower input, and realizing efficient testing.

[0054] See Figures 1 to 6As shown, as an optional solution, it also includes: a support frame 3 for setting the adjustment mechanism 2; the first shaft 24 of the first pulley 22 is mounted on the support frame 3 through a first bearing; and the second shaft 25 of the second pulley 23 is mounted on the support frame 3 through a second bearing.

[0055] The support frame 3 is the skeleton on which the adjustment mechanism 2 is installed. The fixed support function of the support frame 3 provides a rigid mounting base for the first pulley 22 and the second pulley 23, ensuring that the center lines of the first shaft 24 of the first pulley 22 and the second shaft 25 of the second pulley 23 are parallel.

[0056] The support frame 3 includes a base, a bracket, and an outer crossbeam. The base is the basic load-bearing part of the entire battery testing device, and the base can be rectangular. The four corners of the base are equipped with brackets, which are connected to the base vertically or at a certain angle to support the probe mechanism upwards. The outer crossbeam is mounted on top of the bracket, with one outer crossbeam between every two brackets. Both ends of each outer crossbeam are connected to the ends of the two brackets away from the base. The outer crossbeam can stabilize the upper space and form a stable frame structure with the base and bracket.

[0057] In the middle of the area enclosed by the four outer crossbeams, two more crossbeams are provided for mounting guide rails and sliders. The two ends of the two crossbeams are each connected to the outer crossbeams that are parallel to the first and second rotating shafts.

[0058] Mounting platforms are provided on the four supports near the crossbeam ends. The mounting platforms are fixed carriers for the first pulley 22 and the second pulley 23. The first shaft 24 of the first pulley 22 is mounted on the support frame 3 through the first bearing; the second shaft 25 of the second pulley 23 is mounted on the support frame 3 through the second bearing.

[0059] The inner rings of the first and second bearings are always smaller than the diameters of the first and second shafts 24 and 25, ensuring no relative movement between the bearing inner rings and the shafts. The outer rings of the first and second bearings may have slight gaps or slight interference with the mounting holes of the support frame 3, balancing positioning accuracy and assembly convenience. This bearing and shaft design strictly controls the radial runout and axial movement of the pulleys, stabilizing the running trajectory of the first synchronous belt 21 and preventing probe module 1 from shifting due to the shaking of the first pulley 22 and second pulley 23.

[0060] The first and second bearings convert the sliding friction between the first and second shafts 24 and 25 and the support frame 3 into rolling friction within the first and second bearings, thus reducing the coefficient of friction. This reduces energy consumption when the motor 6 drives the first and second pulleys 22 and 23, resulting in smoother adjustment. Furthermore, it avoids adjustment lag caused by unstable frictional resistance during fine adjustments at small intervals.

[0061] When battery 5 undergoes OCV testing, the contact reaction force between probe module 1 and battery 5 is transmitted through the first synchronous belt 21 to the first pulley 22 and the second pulley 23, and then distributed to the support frame 3 via the first bearing and the second bearing. This reduces the deformation and wear of the first rotating shaft 24 and the second rotating shaft 25, and in high-frequency testing scenarios, the lifespan of the mechanism can be increased from thousands to tens of thousands of times.

[0062] The first and second bearings can be bearings with flanges, or shoulders and lock nuts can be added to the first shaft 24 and the second shaft 25 to axially position the bearings and limit the axial displacement of the first pulley 22 and the second pulley 23. Adding a dust cover or sealing ring to the outside of the bearings can prevent dust and electrolyte droplets from the battery 5 testing environment from entering the bearing interior.

[0063] A clearance of 0.01mm to 0.03mm can be provided between the first and second bearings and the mounting holes of the support frame 3, and grease can be applied to facilitate installation and reduce vibration transmission. Oil filling holes can be provided in the bearings for periodic grease application to maintain low friction characteristics.

[0064] See Figures 1 to 6 As shown, as an optional solution, it also includes: the first pulley 22 and the second pulley 23 are both gears, the first synchronous belt 21 is a toothed belt, and the side of the first synchronous belt 21 that contacts the first pulley 22 is provided with meshing teeth; the first synchronous belt 21 is meshed with the first pulley 22 and the second pulley 23.

[0065] The meshing teeth on the inner surface of the first synchronous belt 21 mesh one-to-one with the teeth of the first pulley 22 and the second pulley 23. During transmission, power is transmitted through tooth surface contact, unlike flat belt drives which rely on friction. Meshing transmission avoids the slippage problem of flat belt drives, ensuring that the moving distance of the positive electrode probe module 11 and the negative electrode probe module 12 is strictly consistent with the control quantity of the motor 6, and meeting the precise adaptation of the positive and negative electrode spacing of different battery models 5.

[0066] In this embodiment, meshing transmission is preferred. Since the toothed belt and pulley transmit force through tooth surface meshing, there will be no tension fluctuation of the flat belt when the positive electrode probe module 11 and the negative electrode probe module 12 move in opposite directions. This not only avoids the slight vibration caused by unstable force on the probe, but also ensures the stability of the positive electrode probe module 11 and the negative electrode probe module 12 when they are in contact with the battery 5.

[0067] Since there is no relative slippage in the meshing transmission, the rotational speed of the first pulley 22 and the second pulley 23 strictly satisfy the linear velocity of the first synchronous belt 21, which is the relationship of linear velocity = number of teeth of the pulley × rotational speed. Therefore, when the pulleys rotate, the moving distance of the positive probe module 11 and the negative probe module 12 is completely determined by the rotation angle of the first pulley 22 and the second pulley 23. For example, if the first pulley 22 and the second pulley 23 rotate one revolution, the moving distance of the first synchronous belt 21 is equal to the circumference of the first pulley 22 or the second pulley 23, ensuring that the adjustment accuracy is traceable. The amount of movement can be calculated by the motor 6 and the encoder.

[0068] The tooth profile is usually trapezoidal or circular arc, and needs to be selected according to the power transmission and adjustment accuracy, matching the tooth pitch with the pulley diameter. The smaller the tooth pitch, the more teeth are required for the same pulley diameter, and the higher the transmission accuracy; however, too small a tooth pitch will reduce the load-bearing capacity, and it is necessary to avoid excessive weight of probe module 1, which could lead to tooth breakage.

[0069] The high precision and wear resistance of the arc-shaped teeth ensure stable adjustment accuracy even after long-term use, reducing error drift caused by tooth wear. Preferred applications for arc-shaped teeth include: situations requiring high probe adjustment accuracy, such as a spacing error of less than ±0.05mm; frequent battery type switching (>50 times per day); situations requiring high motor power (>100W); heavy probe module (>2kg) requiring high torque transmission; and environments sensitive to operating noise, such as laboratories or automated workshops.

[0070] Trapezoidal teeth are suitable for scenarios where high precision is not required due to their low cost and ease of procurement, and maintenance and replacement are also more convenient. Preferred scenarios for trapezoidal teeth include: probe adjustment precision requirements are moderate (e.g., tolerance within ±0.2mm), and equipment cost control is strict; probe module 1 is lightweight (e.g., less than 1kg); motor 6 has low power (e.g., less than 50W); operating speed is low (e.g., less than 10m / min); and the equipment is a prototype or in small-batch production, requiring reduced trial-and-error costs.

[0071] See Figures 1 to 6 As shown, as an optional solution, it also includes: a motor 6, which is mounted on the support frame 3, and the output shaft of the motor 6 is connected to the first pulley 22 for transmission.

[0072] The motor 6 drives the first pulley 22 to rotate through the output shaft, which in turn drives the first synchronous belt 21 and the positive probe module 11 and the negative probe module 12 to move. The rotation angle of the motor 6 is converted into the rotation of the pulley in a fixed ratio to ensure that the probe movement distance corresponds strictly with the control amount of the motor 6.

[0073] The transmission connection method between the output shaft of motor 6 and the first pulley 22 needs to be selected according to the type of motor 6, the torque, and the installation space. The transmission connection method includes, but is not limited to, direct rigid connection, gear reduction connection, and synchronous belt pulley transmission.

[0074] The direct rigid connection allows the output shaft of motor 6 to be directly connected to the first shaft 24 of the first pulley 22 via a coupling. This results in high transmission efficiency, fast response speed, and no lag in intermediate links. It is suitable for scenarios where the shaft of motor 6 and the first shaft 24 of the first pulley 22 are collinear, there is sufficient installation space, and the torque is less than 5 N·m.

[0075] The gear reduction connection has a small gear installed on the output shaft of the motor 6, which meshes with the first pulley 22 (or the large gear on the first rotating shaft 24). By reducing the speed through the gear ratio, the torque can be amplified and the pulley speed can be reduced, which is convenient for fine adjustment and is suitable for scenarios that require increasing torque or reducing pulley speed.

[0076] Synchronous belt pulley drive: The output shaft of motor 6 is equipped with a small synchronous pulley, which is connected to the first pulley 22 through a short synchronous belt. Synchronous belt pulley drive allows for a certain installation deviation between motor 6 and pulley, such as a deviation of ±0.5mm, and is noiseless and requires no lubrication. It is suitable for scenarios where the axis of motor 6 is parallel but not collinear with that of pulley, and needs to avoid other components.

[0077] The selection of motor 6 needs to be comprehensively determined by considering the load characteristics, motion requirements (speed, accuracy), and control method (degree of automation) of the probe adjustment mechanism 2 in the battery testing device, balancing cost and reliability while meeting performance requirements. Before selecting motor 6, the required torque and speed of motor 6 need to be calculated.

[0078] In this embodiment, the preferred servo motor 6 has the characteristics of no risk of step loss, higher positioning accuracy, smooth operation, no vibration at low speed, low noise, and good acceleration performance. It is suitable for scenarios with high dynamic response requirements or heavy load and high frequency adjustment.

[0079] See Figures 1 to 6 As shown, as an optional solution, it also includes: a main transmission mechanism 7; the main transmission mechanism 7 includes: a first transmission wheel 71, which is disposed on the output shaft of the motor 6, the motor 6 is fixed on one side of the first mounting platform, and the other side of the first mounting platform is configured to mount the first pulley 22; a second transmission wheel 72, which is disposed on the first rotating shaft 24, and in a second direction the second transmission wheel 72 is located on the third side of the first pulley 22, the second direction being the axial direction of the first rotating shaft 24; and a transmission belt 73, which is mounted on the first transmission wheel 71 and the second transmission wheel 72.

[0080] The main transmission mechanism 7 is a set of speed reduction or speed increase transmission pairs. By adjusting the diameter ratio or tooth ratio of the first transmission wheel 71 and the second transmission wheel 72, the rotational speed relationship between the motor 6 and the first pulley 22 can be flexibly adjusted.

[0081] Specifically, if the diameter of the second drive wheel 72 is larger than that of the first drive wheel 71, it is a speed reduction drive that reduces the speed of the pulley while amplifying the torque, which is suitable for scenarios where the probe module 1 is heavy or requires fine adjustment; if the diameter of the second drive wheel 72 is smaller than that of the first drive wheel 71, it is a speed increase drive that can increase the speed of the pulley, which is suitable for scenarios where the adjustment is fast but the load is small.

[0082] The first mounting platform is a common bearing base on which the motor 6, the first pulley 22, the first transmission wheel 71, and the second transmission wheel 72 are fixed on the support frame 3.

[0083] The motor 6 is fixed to one side of the first mounting platform, and the first pulley 22 is mounted on the other side of the first mounting platform. That is, the motor 6 is on the upper side of the mounting platform in the first direction z, and the first pulley 22 is on the lower side of the mounting platform in the first direction z. The second direction is the axial direction of the first rotating shaft 24, which is the y-axis direction. The second transmission wheel 72 is located on the third side of the first pulley 22. That is, the second transmission wheel 72 and the first pulley 22 share the first rotating shaft 24, eliminating the need for an additional transmission shaft, simplifying the structure and reducing assembly errors.

[0084] The second drive wheel 72, arranged in the second direction, enables the motor 6 and the first pulley 22 to be mounted on opposite sides, thus avoiding the movement trajectory of the probe module 1 or other components on the support frame 3. The drive belt 73 is mounted on the first drive wheel 71 and the second drive wheel 72. The drive belt 73 can be selected as a synchronous belt, V-belt, or flat belt according to the requirements of torque transmission, speed, and accuracy.

[0085] In this embodiment, a synchronous belt is preferably used as the transmission belt 73. The synchronous belt 73, together with the first synchronous belt 21 of the probe adjustment mechanism 2, forms a double synchronization, ensuring that the motor 6 drives the transmission wheel to rotate, which in turn drives the first pulley 22 to rotate. The first pulley 22 drives the first synchronous belt 21, ensuring that the entire movement of the probe module 1 is free of slippage and that accuracy is traceable. The main transmission mechanism 7 and the probe adjustment mechanism 2 use the same type of synchronous belt, which allows for unified procurement of parts and reduces maintenance costs.

[0086] See Figures 1 to 6As shown, as an optional solution, it further includes: an auxiliary adjustment mechanism 8; the auxiliary adjustment mechanism 8 is arranged opposite to the adjustment mechanism 2, and the auxiliary adjustment mechanism 8 includes: a third pulley 81, disposed on the first rotating shaft 24; a fourth pulley 82, disposed on the second rotating shaft 25; a second synchronous belt 83, installed on the third pulley 81 and the fourth pulley 82; the second synchronous belt 83 includes a third part and a fourth part; the third part is the portion of the second synchronous belt 83 on the first side of the third pulley 81 and the fourth pulley 82, and the fourth part is the portion of the second synchronous belt 83 on the second side of the third pulley 81 and the fourth pulley 82; the third part and the fourth part move in opposite directions; the positive electrode probe module 11 is fixedly connected to the first part 211 and the third part; the negative electrode probe module 12 is fixedly connected to the second part 212 and the fourth part.

[0087] The positive electrode probe module 11 is fixed to the first part 211 of the first synchronous belt 21 and the third part of the second synchronous belt 83, and is symmetrically connected on both sides; the negative electrode probe module 12 is fixed to the second part 212 of the first synchronous belt 21 and the fourth part of the second synchronous belt 83, and is symmetrically connected on both sides.

[0088] Since the first part 211 moves in the same direction as the third part and belongs to the same side of the synchronous belt (i.e., the first side of the first direction), and the second part 212 moves in the same direction as the fourth part and also belongs to the same side of the synchronous belt, the first synchronous belt 21 and the second synchronous belt 83 can form a mutually constrained tension system through symmetrical tensioning. Even if there is a slight slack on one side, the other side can still ensure stable meshing, greatly reducing the risk of transmission failure. Furthermore, the probe module 1 moves under the coordinated pull of the first synchronous belt 21 and the second synchronous belt 83 without any unilateral force deviation.

[0089] The dual-side drive of the auxiliary adjustment mechanism 8 and the adjustment mechanism 2 allows the load to be shared by two synchronous belts, reducing the force on each synchronous belt by 50%. This makes it suitable for heavier probe modules 1, such as those with added pressure sensors or multiple probes. It also reduces the deflection of the pulley shaft and reduces bearing wear.

[0090] The aforementioned auxiliary adjustment mechanism 8 and adjustment mechanism 2 provide dual-sided synchronous support and drive for probe module 1. Through symmetrical linkage with adjustment mechanism 2, they achieve power source and motion synchronization, which greatly improves the stability, rigidity and load capacity of probe module 1 and solves problems such as swaying and jamming that may be caused by single-sided drive.

[0091] The aforementioned power source is the same because the auxiliary adjustment mechanism 8 and the adjustment mechanism 2 are powered by the same motor 6. The third pulley 81 is fixed on the first rotating shaft 24, and the fourth pulley 82 is fixed on the second rotating shaft 25. When the motor 6 drives the first pulley 22 to rotate, the first rotating shaft 24 synchronously drives the third pulley 81 to rotate, thereby driving the second synchronous belt 83. The rotation direction of the second synchronous belt 83 is completely consistent with that of the first synchronous belt 21.

[0092] The above-mentioned motion synchronization is because the adjusting mechanism 2 and the auxiliary adjusting mechanism 8 share the same set of rotating shafts. The pulley speed and synchronous belt speed of the adjusting mechanism 2 and the auxiliary adjusting mechanism 8 are exactly the same, which can ensure that there is no speed difference in the transmission on both sides.

[0093] The first pulley 22 and the third pulley 81 are concentrically mounted on the first rotating shaft 24; the second pulley 23 and the fourth pulley 82 are concentrically mounted on the second rotating shaft 25. The parallelism of the axes of the third pulley 81 and the fourth pulley 82 is consistent with the parallelism of the first pulley 22 and the second pulley 23. During machining, the mounting holes of the two rotating shafts are machined using the same reference plane of the support frame 3 for positioning.

[0094] See Figures 1 to 6 As shown, as an optional solution, it also includes: a tray 4, which is disposed on the support frame 3, and a battery 5 is disposed on the tray 4; and an adjustment mechanism 2 that moves relative to the tray 4 in a first direction.

[0095] The tray 4 is set on the base of the support frame 3. The installation of the tray 4 on the support frame 3 is based on the same reference plane as the base, ensuring that the flatness of the tray 4 is less than 0.05mm, so as to avoid misalignment between the battery 5 tab and the probe module 1 due to the tilt of the tray 4.

[0096] The tray 4 can be equipped with positioning features that match the shape of the battery 5, such as grooves, blocks, or positioning pins, to ensure the positional deviation of the battery 5 after placement. Rubber anti-slip pads or cushioning foam can be attached to the surface of the tray 4 to prevent the battery 5 from sliding and to prevent the battery 5 from being bumped during loading. If the test involves a scenario where electrolyte leakage may occur, the tray 4 can be designed with a guide channel to direct the liquid outside the equipment and prevent corrosion of the battery testing device.

[0097] The adjustment mechanism 2 moves relative to the tray 4 in the first direction to ensure that the positive electrode probe module 11 and the negative electrode probe module 12 match the spacing adjustment of the battery 5. After the spacing adjustment, the probe module 1 and the battery 5 are brought close together until the positive electrode probe module 11 and the negative electrode probe module 12 and the positive and negative electrodes of the battery 5 are connected.

[0098] The movement of the adjusting mechanism 2 relative to the tray 4 in the first direction may include the adjusting mechanism 2 moving toward the tray 4 in the first direction, the tray 4 moving toward the adjusting mechanism 2 in the first direction, and the adjusting mechanism 2 and the tray 4 moving toward each other in both directions in the first direction.

[0099] In this embodiment, the tray 4 moves towards the adjustment mechanism 2, while the adjustment mechanism 2 remains stationary. The cable can be directly fixed to the support frame 3, eliminating the need for a drag chain or redundant design and reducing failures caused by cable wear. The position of the probe module 1 in the adjustment mechanism 2 remains unchanged, avoiding the influence of variables such as synchronous belt tension and guide rail clearance on the probe spacing during movement. The fixed probe position ensures that the adjusted spacing does not deviate secondary.

[0100] The movement of tray 4 requires the installation of a linear guide rail or slider and optical axis combination on the bottom of tray 4 along the first direction to ensure the parallelism of tray 4 during movement. The travel distance of tray 4 must cover the distance from the loading position to the testing position, and a mechanical limit block must be installed at the testing position. Photoelectric sensors are installed at the loading position and the testing position to provide real-time feedback on the position of tray 4, ensuring that testing is initiated upon reaching the designated position.

[0101] See Figures 1 to 6 As shown, as an optional scheme, the probe module 1 is provided with multiple sets along a third direction; the third direction is the movement direction of the first synchronous belt 21; the number of sets of probe module 1 is equal to the number of sets of the battery 5 to be tested.

[0102] The third direction is the direction of movement of the first synchronous belt 21. Multiple probe modules 1 are arranged along the third direction. The multiple probe modules 1 can achieve synchronous spacing adaptation through the same set of adjustment mechanism 2, and at the same time, they are connected one-to-one with multiple batteries 5 on the tray 4 to form a parallel architecture of one adjustment and multiple tests.

[0103] All positive probe modules 11 are fixed on the first portion 211 of the first synchronous belt 21, and all negative probe modules 12 are fixed on the second portion 212. When the motor 6 drives the synchronous belt to rotate, the spacing between all probe modules 1 will simultaneously increase or decrease, with completely consistent adjustment accuracy, eliminating the need for individual adjustment of each group. Each group of probe modules 1 corresponds to a group of batteries 5 on the tray 4. During docking, the movement of the tray 4 achieves precise contact between each group of probes and the corresponding battery 5 without interference.

[0104] The tray 4 has the same number of battery 5 positioning positions as the probe module 1 along the third direction, and the positive and negative electrode spacing of each group of batteries 5 is parallel to the third direction, ensuring that the probe spacing after synchronous adjustment can simultaneously accommodate all batteries 5. The positioning accuracy of each group of batteries 5 is consistent, avoiding probe docking failure due to the misalignment of a certain group of batteries 5.

[0105] In summary, all probe modules 1 share a single adjustment mechanism 2 and auxiliary adjustment mechanism 8, eliminating the need for independent motors 6, pulleys, and other transmission components for each probe group, thus reducing hardware costs. The parallel architecture composed of multiple probe modules 1 exhibits a linear increase in efficiency; the more modules, the higher the battery 5 testing efficiency.

[0106] See Figures 1 to 6 As shown, as an optional solution, the positive electrode probe module 11 includes: a first movable frame 111, which is fixedly connected to the first part 211 of the first synchronous belt 21; the first movable frame 111 is provided with at least one first mounting hole on the side away from the first synchronous belt 21; and a casing pressure probe 112, which is disposed in each of the first mounting holes and is used to make contact and conduction with the positive electrode of each battery 5.

[0107] The first moving frame 111 is the skeleton of the probe module 1, mainly used to fix the probe module 1 to the first synchronous belt 21, install the shell pressure probe 112, and ensure the overall rigidity of the probe module 1.

[0108] The rigid connection between the first moving frame 111 and the first synchronous belt 21 requires bolts and positioning pins to fix it to the first part 211 of the first synchronous belt 21, ensuring that the connection is not loose. The movement direction of the first moving frame 111 is completely consistent with that of the synchronous belt, so as to avoid additional displacement of the probe in the third direction due to the misalignment of the connection.

[0109] The support frame 3 is also equipped with a slide rail and a slider. The probe modules 1 are all fixed on the slide rail and slider. The slide rail and slider have a guiding function, which allows the positive probe module 11 and the negative probe module 12 to move in the third direction, and also plays a minimum and maximum limit role.

[0110] The diameter of the first mounting hole is within H7 tolerance of the casing pressure probe 112, meaning the diameter of the first mounting hole is 0.018 mm larger than the diameter of the casing pressure probe 112, ensuring no radial wobble after installation. The depth of the first mounting hole is greater than twice the diameter of the casing pressure probe 112, and the axis of the first mounting hole is perpendicular to the third direction, ensuring perpendicular contact between the casing pressure probe 112 and the positive terminal of battery 5.

[0111] The casing pressure probe 112 is a component that enables elastic contact and reliable conductivity with the positive electrode of battery 5. A suitable casing pressure probe 112 can be selected based on parameters such as the diameter, stroke and elasticity, conductivity, and insulation design of the casing pressure probe 112.

[0112] The probe housing of the pressure probe 112 is fitted with the first mounting hole. After installation, a small amount of anaerobic adhesive is applied to the hole opening to prevent the probe from loosening after frequent contact and vibration. If different batteries 5 need to be adapted, the mounting hole can be designed as a threaded hole, and the probe can be an adjustable model with external threads. The extension height can be adjusted by rotating the probe.

[0113] See Figures 1 to 6As shown, as an optional solution, the negative electrode probe module 12 includes: a second movable frame 121, which is fixedly connected to the second part 212 of the first synchronous belt 21; at least one second mounting hole is provided on the side of the second movable frame 121 away from the first synchronous belt 21, the positions of the second mounting holes correspond one-to-one with the positions of the first mounting holes, and the line connecting the second mounting holes and the corresponding first mounting holes is parallel to the third direction; and a temperature probe 122, which is disposed in each of the second mounting holes and is used to make contact with the negative electrode of the battery 5 for conduction.

[0114] The second mounting hole corresponds one-to-one with the first mounting hole, ensuring that each set of positive electrode probe module 11 and negative electrode probe module 12 corresponds to a set of batteries 5, avoiding test logic confusion and data errors. It also achieves symmetrical structure of positive and negative electrode modules, simplifies processing and maintenance, ensures synchronous and efficient parallel testing of multiple sets of batteries 5, and ultimately achieves accurate and stable batch testing.

[0115] The line connecting the second mounting hole and the first mounting hole in each group is parallel to the third direction, that is, it is completely aligned in the plane in the second direction. This ensures that the positive electrode probe module 11 and the negative electrode probe module 12 are accurately aligned in the direction perpendicular to the battery 5, and also allows the positive electrode probe module 11 and the negative electrode probe module 12 to simultaneously and perpendicularly contact the same positive and negative electrodes of the battery 5, avoiding poor contact or uneven force, ensuring stable test signals, and achieving accurate acquisition of battery 5 data.

[0116] While the temperature probe 122 is in contact with the negative electrode of battery 5 and conducting, it collects the temperature of the surface or tab of battery 5 in real time. It has the following functions: to determine whether battery 5 is overheating, such as a sudden temperature rise during the test, indicating the risk of internal short circuit; to analyze the correlation between temperature and electrical performance, such as the OCV curve with temperature; and to ensure that the test environment meets the standards, such as the room temperature test requiring the temperature to be stable at 25±2℃.

[0117] By setting the negative electrode probe as a temperature probe 122 instead of a regular conductive probe, simultaneous monitoring of electrical performance and temperature is achieved. This eliminates the need for additional independent temperature sensors (such as thermocouples) on battery 5, simplifying the testing process and making it particularly suitable for batch automated testing, thereby increasing the testing efficiency of battery 5.

[0118] The temperature probe 122 is an integrated design for conductivity and temperature measurement. The conductive needle tip is made of a material with a resistance of less than 5mΩ; in this embodiment, gold-plated tungsten steel is preferred to ensure the conductivity of the conductive needle tip. The temperature sensor incorporates a thermistor or thermocouple, with the sensor probe in close contact with the needle tip for rapid response to temperature changes. The integrated conductive and temperature-sensing leads are shielded to prevent signal interference.

[0119] It should be noted that this embodiment also provides an optional battery testing device and a specific testing process, which will be described below with reference to this embodiment.

[0120] The battery testing device provided in this example has a positive electrode probe module 11 and a negative electrode probe module 12, which are respectively fixed on the first part 211 and the second part 212 of the first synchronous belt 21. The first synchronous belt 21 is mounted on the first belt and the second pulley 23. Since the first synchronous belt 21 is a closed loop structure, when the first pulley 22 and the second pulley 23 rotate, the movement directions of the first part 211 and the second part 212 will be completely opposite. For example, when the first part 211 moves to the left, the second part 212 moves to the right. This allows the positive electrode probe module 11 and the negative electrode probe module 12, which are respectively fixed on the first part 211 and the second part 212, to move closer or further away synchronously. This precisely adjusts the distance between the two probes, allowing the probes to contact the battery 5 for OCV testing. This solves the problems of slow changeover efficiency and low testing efficiency when testing the battery 5, thereby achieving the technical effects of improving changeover time, reducing manpower input, and achieving efficient testing.

[0121] Specifically, before the test begins, after the material arrives at tray 4, the positioning pin positions the battery 5, and the photoelectric sensor provides real-time feedback on the position of tray 4. Once the position is confirmed, the barcode scanner retrieves the formula information through barcode scanning. If the cell size is small, the drive belt 73 rotates in direction A, causing the positive electrode probe module 11 and the negative electrode probe module 12 to move laterally and move closer. If the cell size is large, the drive belt 73 rotates in direction B, causing the positive electrode probe module 11 and the negative electrode probe module 12 to move laterally and move away.

[0122] When motor 6 drives the first transmission wheel 71 to rotate clockwise, the first synchronous belt 21 moves clockwise. The first part 211 of the first synchronous belt 21 drives the positive probe module 11 to move to the right along the third direction (x-axis direction), which is direction A. When motor 6 drives the first transmission wheel 71 to rotate counterclockwise, the first synchronous belt 21 moves counterclockwise. The first part 211 of the first synchronous belt 21 drives the positive probe module 11 to move to the left along the third direction (x-axis direction), which is direction B.

[0123] When battery 5 testing begins, the start motor 6 drives the first transmission wheel 71. The transmission belt 73 connects the first transmission wheel 71 and the second transmission wheel 72. The first transmission wheel 71 drives the second transmission wheel 72 and the first rotating shaft 24 through the transmission belt 73. The first rotating shaft 24 drives the first pulley 22. The first synchronous belt 21 connects the first pulley 22 and the second pulley 23. The first pulley 22 drives the second pulley 23 through the first synchronous belt 21. The positive electrode probe module 11 is fixed in the first part 211, and the negative electrode probe module 12 is fixed in the second part 212. The movement of the first synchronous belt 21 drives the positive electrode probe module 11 and the negative electrode probe module 12 to move, thereby realizing the variable pitch of the positive electrode probe module 11 and the negative electrode probe module 12 in the cell width direction.

[0124] After the positive electrode probe module 11 and the negative electrode probe module 12 are spaced to the width of the corresponding positive and negative electrodes of the battery 5, the linear guide rail or slider and optical axis combination at the bottom of the tray 4 drives the tray to move along the first direction, so that the positive and negative electrodes of the battery 5 are close to the shell pressure probe 112 of the positive electrode probe module 11 and the temperature probe 122 of the negative electrode probe module 12.

[0125] The positive electrode potential of battery 5 is collected by the positive electrode probe module 11, and the negative electrode potential of battery 5 is collected by the negative electrode probe module 12. The difference between the positive and negative electrode potentials is the open-circuit voltage (OCV) of battery 5. The casing pressure probe 112 on the positive electrode probe module 11 collects the casing pressure on the positive electrode side of battery 5 to verify the structural integrity of battery 5 and avoid invalid measurement data or safety risks caused by structural failure on the positive electrode side. The temperature probe 122 on the negative electrode probe module 12 collects the temperature on the negative electrode side of battery 5 to provide a temperature correction basis for OCV data and eliminate false deviations in OCV caused by abnormal temperature on the negative electrode side. The two work together to ensure that accurate OCV data that truly reflects the electrochemical state of the battery is obtained.

[0126] The first pulley 22 and the second pulley 23 drive the third pulley 81 and the fourth pulley 82 via the first rotating shaft 24 and the second rotating shaft 25. The second synchronous belt 83 connects the first pulley 22 and the second pulley 23 and moves with the first pulley 22 and the second pulley 23. The positive electrode probe module 11 is fixed to the first part 211 of the first synchronous belt 21 and the third part of the second synchronous belt 83, and is symmetrically connected on both sides. The negative electrode probe module 12 is fixed to the second part 212 of the first synchronous belt 21 and the fourth part of the second synchronous belt 83, and is symmetrically connected on both sides.

[0127] The first synchronous belt 21 and the second synchronous belt 83 mentioned above provide dual-sided synchronous support and drive for the probe module 1. Through symmetrical linkage with the adjustment mechanism 2, the power source and motion synchronization are realized, which greatly improves the stability, rigidity and load capacity of the probe module 1 and solves the problems of swaying and jamming that may be caused by single-sided drive.

[0128] In summary, the battery testing device provided in this embodiment achieves automatic probe module 1 changeover and mixed-line production through automatic control of motor 6, solving the problems of slow changeover efficiency and low testing efficiency during battery 5 testing, thereby achieving the technical effects of improving changeover time, reducing manpower input, and achieving high-efficiency testing.

[0129] It should be noted that the term "comprising" and its variations used in the embodiments of this utility model are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; and the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of this utility model are illustrative and not restrictive. Those skilled in the art should understand that, unless explicitly indicated otherwise in the context, they should be understood as "one or more".

[0130] The term "embodiment" in this specification refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply independence or alternativeity from other embodiments. The various embodiments in this specification are described in a related manner, with reference to each other for similar or identical parts. In particular, for apparatus, device, and system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and relevant details are referred to in the description of the method embodiments.

[0131] The above-described embodiments are merely illustrative of several implementations of this invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this invention, and these modifications and improvements all fall within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the appended claims.

Claims

1. A battery testing device, characterized in that, include: Probe mechanism; The probe mechanism includes: a probe module (1) and an adjustment mechanism (2); The probe mechanism is movable relative to the battery (5) to be tested; The probe module (1) includes a positive probe module (11) and a negative probe module (12). The adjusting mechanism (2) includes a first synchronous belt (21), a first pulley (22), and a second pulley (23); the first synchronous belt (21) is mounted on the first pulley (22) and the second pulley (23); the first synchronous belt (21) includes a first part (211) and a second part (212), the first part (211) is the portion of the first synchronous belt (21) on a first side of the first pulley (22) and the second pulley (23), the first side being one side in a first direction; the second part (212) is the portion of the first synchronous belt (21) on a second side of the first pulley (22) and the second pulley (23), the second side being one side opposite to the first side in a first direction; the first part (211) and the second part (212) move in opposite directions; The positive electrode probe module (11) is disposed on the first part (211), and the negative electrode probe module (12) is disposed on the second part (212).

2. The battery testing apparatus according to claim 1, characterized in that, Also includes: Support frame (3) is used to set the adjustment mechanism (2); The first shaft (24) of the first pulley (22) is mounted on the support frame (3) via a first bearing; The second shaft (25) of the second pulley (23) is mounted on the support frame (3) via a second bearing.

3. The battery testing apparatus according to claim 2, characterized in that, Also includes: The first pulley (22) and the second pulley (23) are both gears, the first synchronous belt (21) is a toothed belt, and the side of the first synchronous belt (21) that contacts the first pulley (22) is provided with meshing teeth; The first synchronous belt (21) is meshed with the first pulley (22) and the second pulley (23).

4. The battery testing apparatus according to claim 2, characterized in that, Also includes: The motor (6) is mounted on the support frame (3), and the output shaft of the motor (6) is connected to the first pulley (22) for transmission.

5. The battery testing apparatus according to claim 4, characterized in that, Also includes: Main transmission mechanism (7); the main transmission mechanism (7) includes: The first transmission wheel (71) is disposed on the output shaft of the motor (6), the motor (6) is fixed on one side of the first mounting platform, and the other side of the first mounting platform is configured to mount the first pulley (22). The second transmission wheel (72) is disposed on the first rotating shaft (24). In the second direction, the second transmission wheel (72) is located on the third side of the first pulley (22). The second direction is the axial direction of the first rotating shaft (24). A transmission belt (73) is mounted on the first transmission wheel (71) and the second transmission wheel (72).

6. The battery testing apparatus according to claim 2, characterized in that, Also includes: Auxiliary adjustment mechanism (8); the auxiliary adjustment mechanism (8) is disposed opposite to the adjustment mechanism (2), and the auxiliary adjustment mechanism (8) includes: The third pulley (81) is mounted on the first rotating shaft (24); The fourth pulley (82) is mounted on the second shaft (25); The second synchronous belt (83) is installed on the third pulley (81) and the fourth pulley (82); The second synchronous belt (83) includes a third part and a fourth part; the third part is the portion of the second synchronous belt (83) on the first side of the third pulley (81) and the fourth pulley (82), and the fourth part is the portion of the second synchronous belt (83) on the second side of the third pulley (81) and the fourth pulley (82); the third part and the fourth part move in opposite directions; The positive electrode probe module (11) is fixedly connected to the first part (211) and the third part; the negative electrode probe module (12) is fixedly connected to the second part (212) and the fourth part.

7. The battery testing apparatus according to any one of claims 2-6, characterized in that, Also includes: A tray (4) is disposed on the support frame (3), and the battery (5) is disposed on the tray (4). The adjustment mechanism (2) moves relative to the tray (4) in the first direction.

8. The battery testing apparatus according to any one of claims 1-6, characterized in that: The probe module (1) is provided in multiple sets along a third direction; the third direction is the movement direction of the first synchronization belt (21); The number of probe modules (1) is equal to the number of batteries (5) to be tested.

9. The battery testing apparatus according to claim 8, characterized in that, The positive electrode probe module (11) includes: The first movable frame (111) is fixedly connected to the first part (211) of the first synchronous belt (21); the first movable frame (111) is provided with at least one first mounting hole on the side away from the first synchronous belt (21); A casing pressure probe (112) is disposed in each of the first mounting holes for making contact with the positive electrode of each of the batteries (5).

10. The battery testing apparatus according to claim 9, characterized in that, The negative electrode probe module (12) includes: The second movable frame (121) is fixedly connected to the second part (212) of the first synchronous belt (21); the second movable frame (121) is provided with at least one second mounting hole on the side away from the first synchronous belt (21), the second mounting hole and the first mounting hole are in a one-to-one correspondence, and the line connecting the second mounting hole and the corresponding first mounting hole is parallel to the third direction. Temperature probes (122) are disposed in each of the second mounting holes for contact and conduction with the negative electrode of the battery (5).

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