Multi-degree-of-freedom adjusting probe array for battery module equalization detection

Abstract

The application discloses a multi-degree-of-freedom adjusting probe array for battery module equalization detection, and relates to the technical field of battery detection.The multi-degree-of-freedom adjusting probe array comprises a base, a plurality of mounting columns are symmetrically and fixedly installed on the base, an electric telescopic rod is fixedly installed in each mounting column, a supporting frame is fixedly and jointly installed at the telescopic ends of the plurality of electric telescopic rods, a plurality of supporting frames are equidistantly clamped in the supporting frame, and a plurality of fixing cylinders are slidably installed in each supporting frame.The application solves the problem that the existing battery module accumulates position errors in the assembly link, causes small height differences in the height direction of each pole in the same module, and causes the surfaces of some battery poles to present a small inclination after welding, which leads to unstable contact between the probe and the pole, and the pole spacing, pole height and arrangement mode of battery modules of different capacities and specifications are greatly different, the common probe array cannot be flexibly adjusted, and the production line efficiency is seriously affected.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and in particular to a multi-degree-of-freedom adjustable probe array for battery module equalization testing. Background Technology

[0002] In fields such as new energy vehicles, energy storage systems, and consumer electronics, battery modules are core energy storage units. The voltage, internal resistance, and capacity consistency of each individual cell in the battery module directly determine the cycle life and safety of the entire module. During the production, assembly, and maintenance of battery modules, equalization testing must be carried out to ensure that the consistency between each individual cell meets the standards.

[0003] However, in actual production, battery modules have multiple sources of error, resulting in a significant non-ideal distribution of the spatial positions of the terminals, specifically manifested in the following aspects:

[0004] First, during the assembly process of the battery module, the positioning of the battery cell into the casing, the clamping of the end plate, and the thermal deformation of welding will accumulate positional errors. These errors cause the center point of each terminal in the same module to shift unequally on the horizontal plane relative to the theoretical position. At the same time, there may also be differences in the height direction. In addition, the terminals of some batteries or large-size square batteries are not completely horizontal after welding. The terminal surface may have a slight tilt angle, which leads to unstable contact between the probe and the terminal.

[0005] Secondly, due to the diversity of module types, battery modules of different capacities have huge differences in terminal spacing, terminal height and arrangement. Ordinary probe arrays cannot be flexibly adjusted, which seriously affects the efficiency of the production line.

[0006] Based on this, the present invention proposes a multi-degree-of-freedom adjustable probe array for battery module equalization detection to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-degree-of-freedom adjustable probe array for battery module equalization detection, so as to solve the problems mentioned in the background art.

[0008] The technical solution of the present invention is: a multi-degree-of-freedom adjustable probe array for battery module equalization detection, including a base, on which multiple mounting columns are symmetrically fixedly installed, each mounting column having an electric telescopic rod fixedly installed inside, the telescopic ends of the multiple electric telescopic rods being fixedly installed on a support frame, multiple support frames being equally spaced and snapped into the inside of the support frame, and multiple fixed cylinders being slidably installed inside each support frame, and also including an adjustment component, a locking component, and a protective component.

[0009] The adjustment component is located inside the fixed cylinder.

[0010] The adjustment assembly includes a floating plug, a fixed iron ring, and a fixed seat. The floating plug is slidably installed inside the fixed cylinder. The fixed iron ring and the fixed seat are respectively fixedly installed at the upper and lower ends of the floating plug. A probe head is movably installed inside the fixed seat.

[0011] The locking assembly is located inside the fixed cylinder and the floating plug.

[0012] The locking assembly includes a pair of movable blocks that are slidably mounted on the inner peripheral wall of the fixed cylinder, and an arc-shaped electromagnet is fixedly mounted on one side of each movable block.

[0013] The protective components are mounted on the fixed cylinder.

[0014] The protective assembly includes a protective cover that is slidably installed inside a fixed cylinder, and the fixed cylinder has a storage slot that is adapted to the protective cover.

[0015] Preferably, a fixing plate is fixedly installed near the end of the fixing ring, a connecting spring is fixedly installed between the fixing plate and the top of the inner wall of the fixing cylinder, a plurality of limiting blocks are fixedly installed at equal intervals on the outer peripheral wall of the floating plug, a plurality of limiting grooves are opened on the inner peripheral wall of the fixing cylinder, and the limiting blocks slide with the limiting grooves.

[0016] Preferably, the probe tip has a ball head at its end, and the fixing seat has a spherical groove inside that matches the ball head, allowing the ball head to rotate freely inside the spherical groove.

[0017] Preferably, the inner peripheral wall of the fixed seat is provided with multiple mounting slots at equal intervals, a return spring is fixedly installed inside the mounting slot, an arc-shaped plate is fixedly installed at the other end of the return spring, multiple balls are rolled on the inner peripheral wall of the fixed seat, the arc-shaped plate and the balls are in contact with the ball head, and a displacement sensor is fixedly installed on the floating plug.

[0018] Preferably, a movable rod slides through the interior of the floating plug and the fixed seat. The end of the movable rod is fixedly connected to the movable block by a connecting rod via a hinge. The fixed iron ring has a movable groove that matches the movement path of the connecting rod. A silicone block is fixedly installed at the bottom of the movable rod.

[0019] Preferably, the inner peripheral wall of the fixed cylinder is provided with a sliding groove, the movable block slides with the sliding groove, and a return spring is fixedly connected between the inner wall of the sliding groove and the movable block.

[0020] Preferably, a pair of limiting posts are fixedly installed at the bottom of the protective cover, and a positioning ring is slidably installed on the pair of limiting posts. A U-shaped rod is fixedly connected between the positioning ring and the fixed cylinder.

[0021] Preferably, the support frame is provided with a pair of adjustment grooves and a sliding groove, and sliders are symmetrically fixedly installed on the fixed cylinder. A positioning frame is fixedly installed between the pair of sliders, and a pair of fixing bolts are threadedly connected to the positioning frame. The sliders and fixing bolts are slidably engaged with the sliding groove and the adjustment groove, respectively.

[0022] Preferably, the support frame has multiple pairs of positioning slots at equal intervals, the support frame slides with the positioning slots, multiple locking plates are rotatably installed at equal intervals on the support frame, a pin slides through the locking plate, and positioning holes are provided at both ends of the support frame, the pin slides with the positioning holes.

[0023] Preferably, an adjustable clamping seat is fixedly installed on the base, and a battery module is fixedly installed on the adjustable clamping seat.

[0024] This invention provides an improved multi-degree-of-freedom adjustable probe array for battery module equalization detection, which has the following improvements and advantages compared with the prior art:

[0025] Firstly, this invention utilizes a floating plug in conjunction with a connecting spring to ensure that the probe head adheres well to the battery module terminals during downward movement. For battery terminals with a certain height difference, the floating plug can adaptively move the fixing seat and probe head. The taller battery terminal will adhere first, and as the probe array moves downward as a whole, the floating plug will automatically move upward under the action of the connecting spring, preventing the probe head from being damaged due to excessive tightness between the probe head and the battery terminal. In addition to being able to adjust autonomously for battery terminals with different height differences, it can also adhere to tilted battery terminals. When the probe head moves downward, because the probe head is hemispherical, it will generate downward pressure when it comes into contact with the tilted battery terminal. This downward pressure will generate a component force on the tilted surface. As the probe array moves downward as a whole, this component force can tilt the probe head, allowing it to gradually adhere to the center of the battery terminal, thereby ensuring that the probe head can stably adhere to each terminal of the battery module, thus ensuring the accuracy of the test results.

[0026] Secondly, this invention also has a locking function. After the battery terminals are attached, the operator controls the arc-shaped electromagnet to be energized via the control panel. After being energized, the arc-shaped electromagnet generates magnetic force, thereby overcoming the tension of the second return spring and automatically adsorbing onto the fixed iron ring, thus achieving the clamping effect on the iron ring. This prevents the floating plug from shaking and improves the detection stability of the probe head. In addition, by utilizing the movement of the arc-shaped electromagnet during the adsorption process, the connecting rod device can move the movable rod and silicone block downwards, causing the silicone block to abut against the ball head set on the probe head, further restricting the free rotation of the ball head, thereby improving the stability of the probe head, ensuring the stability during the detection process, and improving the accuracy of the detection results. Moreover, depending on the actual situation, during the process of the probe head moving downwards and attaching to the battery terminals, it will preferentially push the probe head upwards by a certain distance. During the upward movement, it will squeeze the arc-shaped plate, and the second return spring will generate a reverse squeezing force on the arc-shaped plate, thereby making the arc-shaped plate tightly adhere to the ball head, which can further limit the ball head.

[0027] Thirdly, this invention connects the energizing circuit of the electromagnetic block to the detection circuit in series. The detection circuit is only allowed to conduct for equalization detection when the probe is firmly fixed. This prevents detection when the probe is loosely connected or floating, avoiding erroneous detection data. The position sensor can detect the displacement of the floating plug when the probe head is in contact with the battery terminal in real time, thereby determining the compression of the connecting spring and whether the probe is just touching the terminal. This prevents the probe from damaging the terminal oxide film due to excessive pressure or causing excessive contact resistance due to insufficient pressure, thus affecting the accuracy of the detection results.

[0028] Fourthly, this invention is equipped with a protective component. As the probe array moves downward, the limiting post of the protective component first contacts the surface of the battery module, thereby pushing the protective cover upward until the probe array moves downward to the appropriate position. At this time, the protective cover moves to the appropriate position and exposes the probe head inside, making it convenient for staff to observe whether the probe head and the battery terminal are properly attached. After the test is completed, as the probe array moves upward, the protective cover will automatically move downward under the action of gravity, storing the entire probe head inside the protective cover, thus achieving the protection effect of the probe head. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1This is a schematic diagram of the overall probe array structure provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the single probe array structure provided by the present invention;

[0032] Figure 3 This is a schematic diagram of the fixed cylinder structure provided by the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the fixed cylinder provided by the present invention;

[0034] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the fixed cylinder provided by the present invention;

[0035] Figure 6 Provided by the present invention Figure 5 Enlarged structural diagram at point A in the diagram;

[0036] Figure 7 Provided by the present invention Figure 5 Enlarged structural diagram at point B in the diagram;

[0037] Figure 8 A schematic diagram of the support frame structure provided by the present invention;

[0038] Figure 9 This is a schematic diagram of the support frame structure provided by the present invention;

[0039] Figure 10 This is a schematic diagram of the overall structure of the detection device provided by the present invention;

[0040] Figure 11 This is a front view structural schematic diagram of the detection device provided by the present invention.

[0041] Figure label:

[0042] 1. Base; 11. Mounting column; 12. Electric telescopic rod; 13. Adjustable clamping seat; 14. Battery module;

[0043] 2. Support frame; 21. Positioning groove; 22. Locking plate; 23. Pin rod; 24. Support bracket; 25. Adjustment groove; 26. Slide groove; 27. Positioning hole;

[0044] 3. Fixed cylinder; 31. Sliding block; 32. Positioning bracket; 33. Fixing bolt;

[0045] 4. Floating plug; 41. Fixed iron ring; 42. Fixed seat; 43. Connecting spring; 44. Fixed plate; 45. Limiting groove; 46. Limiting block; 47. Ball bearing; 48. Mounting groove; 49. Return spring one; 410. Arc plate;

[0046] 5. Movable block; 51. Sliding groove; 52. Second return spring; 53. Arc-shaped electromagnet; 54. Movable rod; 55. Silicone block; 56. Connecting rod; 57. Movable groove; 58. Displacement sensor;

[0047] 6. Protective cover; 61. Positioning ring; 62. U-shaped rod; 63. Limiting post; 64. Storage slot;

[0048] 7. Probe head; 8. Ball head. Detailed Implementation

[0049] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] This invention provides an improved multi-degree-of-freedom adjustable probe array for battery module equalization detection. The technical solution of this invention is as follows:

[0051] like Figures 1 to 11 As shown, this embodiment of the invention provides a multi-degree-of-freedom adjustable probe array for battery module equalization testing, including a base 1, on which multiple mounting posts 11 are symmetrically fixedly installed. Each mounting post 11 has an electrically operated telescopic rod 12 fixedly installed inside. The telescopic ends of the multiple electrically operated telescopic rods 12 are jointly fixedly installed with a support frame 2. Multiple support frames 24 are equally spaced and snapped into the interior of the support frame 2. Multiple fixed cylinders 3 are slidably installed inside each support frame 24. The system also includes an adjustment component, a locking component, and a protective component. The electrically operated telescopic rods 12 are all equipped with high-precision servo electric cylinders to achieve synchronous lifting of the four rods, ensuring that the synchronization error is within a reasonable range. The adjustment component automatically adjusts the position of the probe head 7 to accommodate the height difference between the battery module 14 terminals. Furthermore, the locking component secures the probe head 7, preventing shaking during testing and ensuring stable contact between the probe head 7 and the terminal, thus affecting the accuracy of the test results.

[0052] The adjustment component is located inside the fixed cylinder 3. The adjustment component is a purely mechanical adaptive structure that does not require external drive. However, its operation process is monitored in real time by an external controller through a displacement sensor 58. The controller has a "contact detection state machine" with four states: waiting for contact, contact determination, pressure stabilization, and lock-up preparation. The sensor threshold for each state can be set on the user interface to adapt to the electrode material and surface hardness of different battery module 14 models.

[0053] The adjustment assembly includes a floating plug 4, a fixed iron ring 41, and a fixed seat 42. The floating plug 4 is slidably installed inside the fixed cylinder 3. The fixed iron ring 41 and the fixed seat 42 are respectively fixedly installed at the upper and lower ends of the floating plug 4. A probe head 7 is movably installed inside the fixed seat 42. The probe head 7 is made of gold-plated beryllium copper material with a hemispherical tip. The fixed iron ring 41 is made of low carbon steel with a nickel-plated surface to enhance magnetic permeability and prevent rusting. The gap between the outer diameter of the fixed iron ring 41 and the inner diameter of the fixed cylinder 3 is 5-10mm to ensure that the floating plug 4 slides smoothly and without deviation.

[0054] The locking assembly is located inside the fixed cylinder 3 and the floating plug 4, and is controlled by the controller through the digital output module.

[0055] The locking assembly includes a pair of movable blocks 5 that are slidably mounted on the inner circumferential wall of the fixed cylinder 3. An arc-shaped electromagnet 53 is fixedly mounted on one side of the movable block 5. The excitation circuit of each arc-shaped electromagnet 53 is independently connected to a relay. The coil of the relay is driven by the output port of the controller. At the same time, a freewheeling diode is connected in parallel to suppress the back electromotive force. After the locking command is issued, the controller sets a monitoring window, requiring the current to reach a certain value and remain stable in this range for at least 100ms before the locking is considered successful.

[0056] The protective component is mounted on the fixed cylinder 3.

[0057] The protective assembly includes a protective cover 6 that slides inside the fixed cylinder 3. The fixed cylinder 3 has a storage groove 64 that fits the protective cover 6. The inner wall surface of the storage groove 64 is nitrided and coated with a molybdenum disulfide solid lubricant film to ensure that the lower end face of the protective cover 6 is flush with the lower end face of the fixed cylinder 3 when fully retracted. The protective cover 6 is made of POM (polyoxymethylene), which has self-lubricating and impact-resistant properties, and has a chamfered bottom to prevent scratching the surface of the battery module 14.

[0058] Furthermore, a fixing plate 44 is fixedly installed near the end of the fixing ring 41. A connecting spring 43 is fixedly installed between the fixing plate 44 and the top of the inner wall of the fixing cylinder 3. Multiple limiting blocks 46 are fixedly installed at equal intervals on the outer peripheral wall of the floating plug 4. Multiple limiting grooves 45 are opened on the inner peripheral wall of the fixing cylinder 3. The limiting blocks 46 and the limiting grooves 45 are slidably engaged. The connecting spring 43 is made of piano wire, and the two ends of the spring are ground flat. It is clearance-fitted with the spring seat on the fixing plate 44 and the top of the inner wall of the fixing cylinder 3. The length of the limiting groove 45 corresponds to the maximum stroke of the floating plug 4. The limiting blocks 46 and the limiting grooves 45 are precisely clearance-fitted to ensure smooth sliding without jamming.

[0059] Furthermore, the probe head 7 has a ball head 8 at its end, and the fixing seat 42 has a spherical groove inside that matches the ball head 8. The ball head 8 can rotate freely inside the spherical groove. The design gap between the spherical groove and the ball head 8 is 0.02 to 0.04 mm. The spherical surface of the ball head 8 is mirror polished to reduce the rotational friction torque. The allowable rotation angle range of the ball head 8 is sufficient to accommodate common pole tilting and manufacturing errors. In the non-contact state, the ball head 8 hangs down naturally by gravity, but the slight pre-tightening force of the arc plate 410 can prevent it from shaking randomly.

[0060] Furthermore, the inner circumferential wall of the fixed seat 42 is provided with multiple mounting slots 48 at equal intervals. A return spring 49 is fixedly installed inside the mounting slot 48. An arc-shaped plate 410 is fixedly installed at the other end of the return spring 49. Multiple balls 47 are rolled on the inner circumferential wall of the fixed seat 42. The arc-shaped plate 410 and the balls 47 are both in contact with the ball head 8. A displacement sensor 58 is fixedly installed on the floating plug 4. The displacement sensor 58 is a miniature Hall effect linear sensor. The sensor integrates a linear Hall element and a temperature compensation circuit. When the floating plug 4 moves, the displacement sensor 58 can detect the displacement change of the floating plug 4 in real time and obtain the displacement distance. The compression force of the connecting spring 43 can be calculated. This pressure value is used for subsequent contact determination and pressure closed-loop control.

[0061] Furthermore, a movable rod 54 slides through the interior of the floating plug 4 and the fixed seat 42. The end of the movable rod 54 is fixedly connected to the movable block 5 by a connecting rod 56 via a hinge. The fixed iron ring 41 has a movable groove 57 that matches the movement path of the connecting rod 56. A silicone block 55 is fixedly installed at the bottom of the movable rod 54. The silicone block 55 is cylindrical. When the movable block 5 is pulled close to the fixed iron ring 41 by the arc-shaped electromagnet 53, the movable block 5 drives the connecting rod 56 to rotate around the hinge at the upper end of the movable rod 54, pushing the movable rod 54 downward. After the silicone block 55 presses down on the contact ball head 8, it is sufficient to suppress any slight rotation of the probe head 7 during the detection process, ensuring stable contact resistance.

[0062] Furthermore, a sliding groove 51 is provided on the inner circumferential wall of the fixed cylinder 3. The movable block 5 slides with the sliding groove 51. A return spring 52 is fixedly connected between the inner wall of the sliding groove 51 and the movable block 5. When the movable block 5 moves, the elastic force increases. The electromagnetic attraction generated by the arc electromagnet 53 is sufficient to overcome the elastic force. The gap between the movable block 5 and the electromagnet is 0.1mm, which ensures smooth movement and prevents jamming.

[0063] Furthermore, a pair of limiting posts 63 are fixedly installed at the bottom of the protective cover 6. A positioning ring 61 is slidably installed on the pair of limiting posts 63. A U-shaped rod 62 is fixedly connected between the positioning ring 61 and the fixed cylinder 3. The limiting post 63 is a stainless steel round rod, one end of which is pressed into the blind hole at the bottom of the protective cover 6, and the other end is free. The positioning ring 61 is a brass ring. When the protective cover 6 moves upward, the positioning ring 61 slides downward relative to the limiting post 63. When the protective cover 6 reaches the top, the end face of the limiting post 63 presses against the positioning ring 61 to achieve mechanical limiting.

[0064] Furthermore, the support frame 24 is provided with a pair of adjustment grooves 25 and sliding grooves 26. Slider 31 is symmetrically fixedly installed on the fixed cylinder 3. A positioning frame 32 is fixedly installed between the pair of sliders 31. A pair of fixing bolts 33 are threadedly connected to the positioning frame 32. The sliders 31 and fixing bolts 33 slide in contact with the sliding grooves 26 and adjustment grooves 25 respectively. The sliders 31 are stainless steel blocks, and their cross-section matches the sliding grooves 26. After adjustment, the fixing bolts 33 are tightened, and their bottoms press against the bottom surface of the adjustment grooves 25. The clamping force generated is sufficient to resist the inertial force when the probe array moves. During mass production, the operator adjusts the position of all fixed cylinders 3 in advance according to the drawings of the battery module 14 and records it on the work order, so that there is no need to repeat the adjustment every time the test is performed.

[0065] Furthermore, the support frame 2 has multiple pairs of positioning slots 21 spaced at equal intervals. The support frame 24 slides with the positioning slots 21. Multiple locking plates 22 are rotatably mounted on the support frame 2 at equal intervals. Pins 23 slide through the locking plates 22. Positioning holes 27 are provided at both ends of the support frame 24. Pins 23 slide with the positioning holes 27. The spacing of the positioning slots 21 is 20mm, corresponding to the multiples of the terminal spacing of common battery modules 14 on the market (e.g., 20mm, 40mm, 60mm, etc.). The number of support frames 24 can be increased or decreased arbitrarily according to testing requirements. The front end of the pin 23 is machined with a taper to facilitate automatic centering when inserted into the positioning hole 27. A torsion spring is installed at the rotating shaft of the locking plate 22 to keep the pin 23 in the inserted state and prevent it from falling off due to vibration. When the support frame 24 needs to be replaced, the operator can manually pull out the pin 23 and rotate the locking plate 22 to remove the support frame 24. This replacement process requires no tools and is suitable for multi-variety, small-batch production.

[0066] Furthermore, an adjustable clamping seat 13 is fixedly installed on the base 1, and a battery module 14 is fixedly installed on the adjustable clamping seat 13. The adjustable clamping seat 13 can be any existing clamping seat, so there is no detailed description of the adjustable clamping seat 13. It can effectively clamp battery modules 14 of different sizes and specifications, ensuring the stability of the battery module 14 during the testing process.

[0067] The specific working principle is as follows: The floating plug 4, in conjunction with the connecting spring 43, achieves adaptive contact between the probe and the electrode post. During the downward movement, the controller first drives the electric telescopic rod 12 to descend rapidly to near the height, and then switches to slow mode. The displacement sensor 58 provides real-time feedback on the compression amount. When the compression amount of all channels enters the specified range and stabilizes for 100ms, it stops. If there is overpressure, it slightly retracts, forming a pressure closed loop to prevent damage to the oxide film on the electrode post.

[0068] For the tilted pole, the hemispherical probe head 7 is subjected to a tangential force upon contact, and the spherical head 8 rotates freely within the spherical groove until the probe end face and the pole achieve maximum contact area. The controller monitors displacement fluctuations, and the adaptive process requires no electrical intervention.

[0069] After bonding is completed, the device enters the locking state. The controller drives the arc-shaped electromagnet 53, which overcomes the tension of the return spring 52 and thus adheres to the fixed iron ring 41. At the same time, the connecting rod 56 pushes the movable rod 54 to press down the silicone block 55, which presses against the ball head 8, thereby limiting its rotation. After the locking current reaches the standard for 100ms, the controller closes the main relay of the detection circuit. The probe head 7 adopts a four-wire Kelvin connection. The external detection device uses time-division multiplexing of each channel to measure the individual unit voltage and internal resistance. The locking circuit and the detection circuit are interlocked in series. Detection is prohibited when there is a loose connection. This detection method adopts existing mature detection methods.

[0070] In addition, displacement sensor 58 is also used for pressure closed-loop control. The controller converts the compression amount into contact pressure according to the calibrated spring stiffness. The target pressure is set according to the pole material. If the pressure exceeds the upper limit, the electric telescopic rod 12 will retract slightly to adjust. Before testing, a small current is applied to verify the contact resistance. If it fails, the pressure is automatically increased for retesting to ensure data reliability.

[0071] The protective component is passive. When it descends, the limit post 63 first contacts the module surface, pushing the protective cover 6 upward to expose the probe head 7. When it rises, the protective cover 6 falls under gravity to cover the probe head 7. The mechanical stop limit prevents the probe from being damaged. The entire detection process is controlled by PLC to achieve fully automatic balanced detection and quality traceability.

[0072] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-degree-of-freedom adjustable probe array for battery module equalization detection, comprising a base (1), characterized in that: Multiple mounting columns (11) are symmetrically fixedly installed on the base (1). An electric telescopic rod (12) is fixedly installed inside each mounting column (11). The telescopic ends of the multiple electric telescopic rods (12) are jointly fixedly installed on a support frame (2). Multiple support frames (24) are equally spaced and snapped into the inside of the support frame (2). Multiple fixed cylinders (3) are slidably installed inside each support frame (24). The base also includes: An adjustment component is disposed inside the fixed cylinder (3); The adjustment assembly includes a floating plug (4), a fixed iron ring (41) and a fixed seat (42). The floating plug (4) is slidably installed inside the fixed cylinder (3). The fixed iron ring (41) and the fixed seat (42) are respectively fixedly installed at the upper and lower ends of the floating plug (4). A probe head (7) is movably installed inside the fixed seat (42). A locking assembly is disposed inside the fixed cylinder (3) and the floating plug (4); The locking assembly includes a pair of movable blocks (5) that are slidably mounted on the inner peripheral wall of the fixed cylinder (3), and an arc-shaped electromagnet (53) is fixedly mounted on one side of the movable block (5). A protective component is disposed on a fixed cylinder (3); The protective assembly includes a protective cover (6) that is slidably installed inside the fixed cylinder (3), and the fixed cylinder (3) has a storage groove (64) adapted to the protective cover (6).

2. The multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: A fixing plate (44) is fixedly installed near the end of the fixing ring (41). A connecting spring (43) is fixedly installed between the fixing plate (44) and the top of the inner wall of the fixing cylinder (3). Multiple limiting blocks (46) are fixedly installed at equal intervals on the outer peripheral wall of the floating plug (4). Multiple limiting grooves (45) are opened on the inner peripheral wall of the fixing cylinder (3). The limiting blocks (46) and the limiting grooves (45) slide together.

3. The multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The probe head (7) has a ball head (8) at its end, and the fixing seat (42) has a spherical groove inside that is adapted to the ball head (8). The ball head (8) can rotate freely inside the spherical groove.

4. The multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The inner peripheral wall of the fixed seat (42) is provided with multiple mounting slots (48) at equal intervals. A reset spring (49) is fixedly installed inside the mounting slot (48). An arc plate (410) is fixedly installed at the other end of the reset spring (49). Multiple balls (47) are rolled on the inner peripheral wall of the fixed seat (42). The arc plate (410) and the balls (47) are both in contact with the ball head (8). A displacement sensor (58) is fixedly installed on the floating plug (4).

5. The multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The floating plug (4) and the fixed seat (42) are connected by a sliding rod (54). The end of the sliding rod (54) is fixedly connected to the movable block (5) by a hinge. The fixed iron ring (41) is provided with a movable groove (57) that matches the movement path of the connecting rod (56). A silicone block (55) is fixedly installed at the bottom of the sliding rod (54).

6. The multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The inner circumferential wall of the fixed cylinder (3) is provided with a sliding groove (51), the movable block (5) slides in cooperation with the sliding groove (51), and a reset spring (52) is fixedly connected between the inner wall of the sliding groove (51) and the movable block (5).

7. A multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: A pair of limiting posts (63) are fixedly installed at the bottom of the protective cover (6), and a positioning ring (61) is slidably installed on the pair of limiting posts (63). A U-shaped rod (62) is fixedly connected between the positioning ring (61) and the fixed cylinder (3).

8. A multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The support frame (24) is provided with a pair of adjustment grooves (25) and sliding grooves (26). Sliders (31) are symmetrically fixed on the fixed cylinder (3). A positioning frame (32) is fixedly installed between the pair of sliders (31). A pair of fixing bolts (33) are threaded on the positioning frame (32). The sliders (31) and fixing bolts (33) slide in cooperation with the sliding grooves (26) and adjustment grooves (25), respectively.

9. A multi-degree-of-freedom adjustable probe array for battery module equalization detection according to claim 1, characterized in that: The support frame (2) has multiple pairs of positioning slots (21) at equal intervals. The support frame (24) slides with the positioning slots (21). Multiple locking plates (22) are rotatably installed at equal intervals on the support frame (2). A pin rod (23) slides through the locking plate (22). Positioning holes (27) are opened at both ends of the support frame (24). The pin rod (23) slides with the positioning hole (27).

10. A multi-degree-of-freedom adjustable probe array for battery module equalization detection according to any one of claims 1-9, characterized in that: An adjustable clamping seat (13) is fixedly installed on the base (1), and a battery module (14) is fixedly installed on the adjustable clamping seat (13).

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