A lithium battery detection device

Abstract

The application relates to the technical field of lithium battery electrical performance test, and discloses a lithium battery detection device which comprises a base and further comprises: a clamping part which comprises a transverse clamping assembly and a longitudinal clamping assembly and is arranged on the base and vertically staggered; a centering part which is arranged on the base and the longitudinal clamping assembly and is driven to move to the two sides of the longitudinal center position of the lithium battery when the transverse clamping assembly is attached to the lithium battery; and a detection mechanism which is arranged on the centering part and comprises a direction-changing assembly and a detection assembly, wherein the detection assembly faces the outer side of the base in the clamping stage. The application can realize continuous electrical performance detection of lithium batteries of different specifications, automatically realize centering and pressing of the probe and the pole and abutting of the temperature sensing probe and the optimal temperature measuring area, simplify the detection process, improve the detection efficiency, and adapt to the detection of lithium batteries of different specifications.

Description

Technical Field

[0001] This invention relates to the field of lithium battery electrical performance testing technology, specifically to a lithium battery testing device. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems and consumer electronics, lithium batteries, as core energy storage components, have become a crucial link in the industrial chain for electrical performance testing and quality control. After production, lithium batteries need to undergo multiple electrical performance testing procedures to ensure that their electrical performance, safety and consistency meet the standard requirements. Among them, terminal contact testing and temperature monitoring are two key testing items.

[0003] During lithium battery testing, the testing probe needs to make precise contact with the battery terminals to ensure accurate transmission of the testing signal. At the same time, the temperature of the lithium battery casing is detected by a temperature sensor. The temperature detection should usually be controlled in the center area of ​​the long side of the lithium battery (the optimal temperature measurement area), because it is far away from the concentrated heat generation area of ​​the terminals, and avoids areas with low temperature (such as the four corners, the bottom of the battery, etc.), so as to minimize interference to the detection and ensure the most accurate temperature measurement.

[0004] Currently, during the testing process of lithium batteries, the clamping of lithium batteries and the testing mold are usually independent of each other, and the testing mechanism cannot adapt to the position of the terminal post and the center of the battery according to the battery specifications (or use multiple perspective sensors to achieve this). At the same time, there is a risk of interference between the testing mechanism and the clamping of the lithium battery, resulting in a cumbersome testing process, low efficiency, and poor compatibility. Summary of the Invention

[0005] This invention provides a lithium battery testing device that automatically adjusts the probe position according to the width of the lithium battery through a central part, and achieves precise alignment between the probe and the electrode through a centering mechanism. At the same time, the reversing component improves the continuity of the lithium battery testing process, simplifies the lithium battery testing operation process, improves batch testing efficiency, and enhances the compatibility of the device. It solves the problems of cumbersome procedures, low efficiency, and poor compatibility mentioned in the background art.

[0006] This invention provides the following technical solution:

[0007] A lithium battery testing device includes a base and further includes: a clamping part, comprising a horizontal clamping assembly and a vertical clamping assembly, both disposed on the base and arranged in a vertically staggered manner; a central part, disposed on the base and the vertical clamping assembly, wherein when the horizontal clamping assembly is in contact with the lithium battery, the central part is driven to move to both sides of the vertical center position of the lithium battery; a testing mechanism, disposed on the central part, the testing mechanism including a reversing assembly and a testing assembly, wherein during the clamping stage, the testing assembly faces outward from the base, and during the testing stage, the testing assembly extends downward and adjusts the angle between itself and the base through the reversing assembly, causing the testing assembly to swing above the lithium battery; a centering mechanism, disposed on one of the sets of testing assemblies, wherein during the testing stage, the centering mechanism is in contact with both sides of the lithium battery terminals and drives the testing assembly to center with the lithium battery terminals; and a temperature sensing mechanism, disposed on the horizontal clamping assembly, wherein when the vertical clamping assembly is in contact with the lithium battery, the temperature sensing mechanism is driven to move to the center position of the sidewall of the lithium battery.

[0008] As a preferred embodiment of the present invention, both the transverse clamping assembly and the longitudinal clamping assembly include guide grooves and drive screws. The guide grooves are symmetrically formed on the inner wall of the base. The drive screws are rotatably connected to the guide grooves. A first clamp is provided in the guide groove perpendicular to the two terminals of the lithium battery, and a second clamp is provided in the guide groove along the direction of the two terminals of the lithium battery. The second clamp is perpendicular to the first clamp and is located above the first clamp. The first clamp and the second clamp are threadedly connected to the drive screws in the corresponding guide grooves.

[0009] As a preferred embodiment of the present invention, the central portion includes a sliding groove, which is respectively formed on the base and the longitudinal clamping assembly. The two sliding grooves are arranged in parallel. The reversing assembly is slidably connected to the sliding groove. A driven screw is rotatably connected in the sliding groove on the base. The reversing assembly and the driven screw are threadedly connected. A linkage is provided between the shaft end of the driven screw and the shaft end of the driving screw in the corresponding direction to drive the driven screw and the driving screw to rotate in a linkage and change speed.

[0010] As a preferred embodiment of the present invention, it further includes a dual-chamber hydraulic rod and a telescopic rod. One end of the dual-chamber hydraulic rod is connected to the base, and the other end of the dual-chamber hydraulic rod is connected to the reversing assembly on the driven screw. One end of the telescopic rod is connected to the longitudinal clamping assembly, and the other end of the telescopic rod is connected to the reversing assembly on the longitudinal clamping assembly. One of the chambers of the dual-chamber hydraulic rod is connected to the telescopic rod through a pipe to drive the two reversing assemblies to move synchronously.

[0011] As a preferred embodiment of the present invention, the reversing assembly includes a support column, a mounting base, and a collar. The mounting base is rotatably connected to the support column, and the collar is sleeved on the support column. The support column has symmetrically arranged spiral grooves and lifting grooves, which are connected to each other. Limiting blocks are symmetrically installed on the inner wall of the collar, and the limiting blocks match the spiral grooves and lifting grooves. A connecting telescopic component is installed on the collar.

[0012] As a preferred embodiment of the present invention, the detection component includes a lifting device, a guide rail is provided on the mounting base, the lifting device is slidably connected to the mounting base through the guide rail, a mounting frame is installed at the output end of the lifting device, an elastic probe is installed on the mounting frame, and one end of the connecting telescopic member is connected to the mounting frame.

[0013] As a preferred embodiment of the present invention, the centering mechanism includes an extension plate and a lifting plate. The extension plate is symmetrically mounted on a mounting bracket on one of the sets of detection components. The lifting plate and the extension plate are slidably connected and are perpendicularly distributed. A first spring is installed between the top of the lifting plate and the extension plate.

[0014] As a preferred embodiment of the present invention, it further includes a sliding rod and a wedge block. The sliding rod is slidably connected to the lifting plate. The wedge block is installed on the side of the sliding rod that is close to each other. A second spring is installed between the end of the sliding rod and the lifting plate. An extrusion member is provided on the side of the wedge block that is close to each other. A ratchet is provided on the lifting plate. A hydraulic locking member is installed on the side of the extension plate that is close to the ratchet. The wedge block has a cavity inside that matches the extrusion member. The cavity is connected to the hydraulic locking member through a pipe.

[0015] Compared with the prior art, the present invention provides a lithium battery testing device, which has the following beneficial effects:

[0016] 1. In this lithium battery testing device, the lithium battery is clamped and fixed by the clamping part, and the testing mechanism is moved along the width direction of the lithium battery to the center position of the lithium battery by the centering part. At the same time, the angle of the testing component is adjusted by the reversing component so that it is positioned above the lithium battery terminal. In addition, the centering mechanism automatically realizes the centering and clamping during the testing process, and can simultaneously perform the clamping of the lithium battery and the testing of the terminal. This not only simplifies the testing process, but also enables precise centering of the probe and the terminal. It can also be used to test lithium batteries of different specifications, improving the stability and efficiency of the lithium battery testing process.

[0017] 2. In this lithium battery testing device, the clamping part can drive the temperature sensing mechanism to move along the long side of the lithium battery. When the lithium battery is fixed, the temperature sensing probe elastically abuts against the center of the lithium battery casing. This not only captures the temperature changes of the lithium battery in real time, but also improves the accuracy of temperature measurement, thereby further improving the efficiency of batch testing on the lithium battery production line.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention enables continuous electrical performance testing of lithium batteries of different specifications, and automatically achieves the alignment and clamping of the probe and the electrode, and the contact of the temperature sensing probe with the optimal temperature measurement area, simplifying the testing process, improving testing efficiency, and adapting to the testing of lithium batteries of different specifications. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0020] Figure 1 This is a three-dimensional schematic diagram from a first perspective of the present invention;

[0021] Figure 2 This is a three-dimensional schematic diagram from a second perspective of the present invention;

[0022] Figure 3 This is a partial three-dimensional schematic diagram of the detection mechanism in this invention;

[0023] Figure 4 This is a partial three-dimensional cross-sectional view of the support column and collar of the present invention;

[0024] Figure 5 This is a three-dimensional schematic diagram of the centering mechanism in this invention;

[0025] Figure 6 This is a partial three-dimensional schematic diagram of the centering mechanism in this invention;

[0026] Figure 7 This is a three-dimensional cross-sectional view of the first clamp and the temperature sensing mechanism in this invention.

[0027] In the diagram: 1. Base; 2. Guide groove; 3. Drive screw; 4. First clamp; 5. Second clamp; 6. Slide groove; 7. Driven screw; 8. Linkage component; 9. Double-chamber hydraulic rod; 10. Telescopic rod;

[0028] 11. Testing mechanism; 111. Support column; 112. Mounting base; 113. Guide rail; 114. Lifting device; 115. Mounting frame; 116. Elastic probe; 117. Connecting telescopic component; 118. Adjusting rod; 119. Collar; 1110. Spiral groove; 1111. Lifting groove; 1112. Limiting block;

[0029] 12. Centering mechanism; 121. Extension plate; 122. Lifting plate; 123. First spring; 124. Slide rod; 125. Second spring; 126. Wedge block; 127. Extrusion component; 128. Racket tooth; 129. Hydraulic locking component;

[0030] 13. Groove;

[0031] 14. Temperature sensing mechanism; 141. Movable base; 142. Movable gear; 143. Fixed gear plate; 144. Drive gear plate; 145. Temperature sensing probe; 146. Third spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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.

[0033] Reference Figures 1-7 A lithium battery testing device includes a base 1, which provides physical support and positioning reference for all subsequent functional modules, enabling each actuator to work collaboratively within a unified coordinate system. The base 1 integrates the dispersed clamping, testing, and driving components into an organic whole through its rigidity and flatness, avoiding the cumulative errors caused by the independent installation of each module, improving the overall rigidity and assembly consistency of the device, and providing a stable and reliable physical foundation for lithium battery testing. The base 1 is first fixed to the workbench, becoming the zero-point reference for the installation and debugging of all subsequent components.

[0034] Reference Figures 1-2The clamping part specifically includes a horizontal clamping assembly and a vertical clamping assembly, both of which are set on the base 1 and are vertically staggered. Both the horizontal clamping assembly and the vertical clamping assembly include a guide groove 2 and a drive screw 3. The guide groove 2 is symmetrically opened on the inner wall of the base 1. The drive screw 3 is rotatably connected in the guide groove 2. A first clamp 4 is set in the guide groove 2 along the vertical direction of the two terminals of the lithium battery. A second clamp 5 is set in the guide groove 2 along the direction of the two terminals of the lithium battery. The second clamp 5 is perpendicular to the first clamp 4 and is located above the first clamp 4. The first clamp 4 and the second clamp 5 are threadedly connected to the drive screw 3 in the corresponding guide groove 2.

[0035] The guide groove 2 provides a precise linear motion track for the first clamp 4 and the second clamp 5. When the drive screw 3 rotates, the helical surface of its thread pushes the mating nut (first clamp 4 and second clamp 5) to make linear displacement along the guide groove 2. It should be noted that the drive screw 3 is usually driven by a motor. When stopped, the drive screw 3 has a self-locking effect. The symmetrically opened guide groove 2 ensures that the first clamp 4 and the second clamp 5 move symmetrically about the center line, achieving a self-centering effect, smooth transmission, and high positioning accuracy. The symmetrical structure ensures a balanced distribution of clamping force. A three-dimensional staggered layout is formed. The first clamp 4 clamps the side of the battery from the vertical direction of the electrode post, and the second clamp 5 clamps the other side of the battery from the direction of the electrode post. Together with the base 1, they form a four-sided clamp. The first clamp 4 and the second clamp 5 move synchronously or asynchronously in their respective guide grooves 2. The vertical distribution and staggered arrangement of the structure make the first clamp 4 and the second clamp 5 layered in the height direction, avoiding mechanical interference between clamps in the same plane. This achieves full-enclosed clamping of the four sides of the rectangular lithium battery, with uniform clamping force distribution. The three-dimensional layered layout greatly saves the planar space occupied and improves the structural compactness.

[0036] Reference Figures 1-2 The central part is located on the base 1 and the longitudinal clamping assembly. When the transverse clamping assembly is in contact with the lithium battery, the central part is driven to move to both sides of the longitudinal center position of the lithium battery. The central part includes a sliding groove 6, which is respectively opened on the base 1 and the longitudinal clamping assembly. The two sliding grooves 6 are arranged in parallel. The reversing assembly is slidably connected to the sliding groove 6. A driven screw 7 is rotatably connected in the sliding groove 6 on the base 1. The reversing assembly is threadedly connected to the driven screw 7. A linkage 8 is provided between the shaft end of the driven screw 7 and the shaft end of the corresponding drive screw 3 to drive the driven screw 7 and the drive screw 3 to rotate in a linkage and change speed.

[0037] Among them, the double parallel slide 6 uses two parallel constraints to eliminate all rotational degrees of freedom of the moving component, leaving only one linear degree of freedom. The reversing component slides synchronously within the two slides 6, transitioning from the initial position to both sides of the longitudinal center of the battery. Through the cross-component arrangement of the double parallel slide 6, the reversing component can move smoothly across the height difference between the lateral and longitudinal clamping components, ensuring the straightness and stability of the detection mechanism 11 during the movement process. The driven screw 7 provides precise displacement drive for the reversing component, and the linkage 8 can adopt a sprocket structure, a pulley structure, or a gear belt connection. In addition, the displacement ratio between the detection mechanism 11 and the second clamp 5 can be adjusted by adjusting the helical angle of the driven screw 7 or the rotational speed ratio of the linkage 8. This allows the detection mechanism 11 to move to the center position of the lithium battery when the second clamp 5 is in contact with the lithium battery, achieving precise positioning of the detection mechanism 11. The clamping stroke and the detection positioning stroke are bound together by mechanical transmission, realizing multi-axis coordinated motion under a single power input, simplifying the control system. At the same time, through the speed ratio design, the moving speed of the detection mechanism 11 and the clamping speed of the second clamp 5 can be matched to the optimal process cycle.

[0038] Reference Figure 1 It also includes a dual-chamber hydraulic rod 9 and a telescopic rod 10. One end of the dual-chamber hydraulic rod 9 is connected to the base 1, and the other end of the dual-chamber hydraulic rod 9 is connected to the reversing assembly on the driven screw 7. One end of the telescopic rod 10 is connected to the longitudinal clamping assembly, and the other end of the telescopic rod 10 is connected to the reversing assembly on the longitudinal clamping assembly. One of the chambers of the dual-chamber hydraulic rod 9 is connected to the telescopic rod 10 through a pipe to drive the two reversing assemblies to move synchronously.

[0039] When the reversing component needs to move, the dual-chamber hydraulic rod 9 is stretched or compressed, and the hydraulic oil in one of the chambers is transported to the telescopic rod 10 through a pipeline. It should be explained that the connecting pipeline between the two rods can be laid inside the base 1, so that the detection mechanisms 11 on both sides of the lithium battery can move synchronously, achieving synchronous and accurate positioning of the two poles. In addition, the dual-chamber hydraulic rod 9 can also play a buffering role, making the movement of the detection mechanism 11 more stable, ensuring that the two detection mechanisms 11 reach the working position at the same time. The hydraulic synchronization circuit replaces the complex electrical synchronization control, achieving mechanical rigid synchronization of the two detection mechanisms 11, avoiding the asynchrony error caused by the independent drive of the two shafts, and ensuring that the two detection mechanisms 11 always reach the longitudinal center of the battery symmetrically.

[0040] Reference Figures 3-6 The detection mechanism 11 is located in the center. The detection mechanism 11 includes a reversing component and a detection component. During the clamping stage, the detection component faces the outside of the base 1. During the detection stage, the detection component extends downward and adjusts the angle between itself and the base 1 through the reversing component, so that the detection component swings above the lithium battery.

[0041] Reference Figures 3-4 The reversing assembly includes a support column 111, a mounting base 112, and a collar 119. The mounting base 112 is rotatably connected to the support column 111, and the collar 119 is sleeved on the support column 111. The support column 111 has a spiral groove 1110 and a lifting groove 1111 symmetrically arranged on it. The spiral groove 1110 and the lifting groove 1111 are connected. Limiting blocks 1112 are symmetrically installed on the inner wall of the collar 119. The limiting blocks 1112 match the spiral groove 1110 and the lifting groove 1111. A connecting telescopic component 117 is installed on the collar 119.

[0042] The mounting base 112 supports the detection component and provides it with a degree of freedom to swing. The collar 119 is a driving component connecting the support column 111 and the detection component. The rotation of the mounting base 112 around the support column 111 enables the horizontal swing of the detection component, while the support column 111 remains fixed. During the detection phase, the mounting base 112 rotates a certain angle around the support column 111, while the collar 119 simultaneously performs lifting and rotational movements on the support column 111. This concentrates the rotational and translational degrees of freedom on the same component, reducing the number of parts. When the limiting block 1112 on the collar 119 moves within the groove, the spiral groove 1110 causes the collar 119 to descend and rotate simultaneously, while the lifting groove 1111 causes the collar 119 to only rise and fall. When not rotating, as in the initial state, the detection mechanism 11 is offset from the base 1 to prevent interference with the detection mechanism 11 when the lithium battery is placed. After the lithium battery is placed and clamped, the angle of the detection mechanism 11 is automatically adjusted during the detection process so that it is above the lithium battery, so as to facilitate subsequent detection processes and thus realize the continuous detection of the lithium battery. The connecting telescopic component 117 can compensate for the distance change between the collar 119 and the mounting bracket 115. The force transmission between the two connection points is maintained through length adaptive adjustment, so as to adjust the position of the detection component according to the specific lithium battery terminal and side, and enable the elastic probe 116 to be accurately aligned and pressed with the terminal.

[0043] Reference Figure 3 The detection component includes a lifting device 114, a guide rail 113 on a mounting base 112, the lifting device 114 is slidably connected to the mounting base 112 via the guide rail 113, a mounting frame 115 is installed at the output end of the lifting device 114, an elastic probe 116 is installed on the mounting frame 115, and one end of the connecting telescopic component 117 is connected to the mounting frame 115.

[0044] The lifting device 114 can be equipped with hydraulic devices, cylinders, etc., to drive the elastic probe 116 to move up and down. The elastic probe 116 adopts an integrated elastic structure. The spring or elastic body inside the elastic probe 116 causes it to retract controllably when compressed, maintaining a constant contact pressure with the terminal post to avoid collision damage between the elastic probe 116 and the terminal post. This ensures the verticality and straightness of the descent trajectory of the elastic probe 116, avoids misalignment between the elastic probe 116 and the terminal post, improves the accuracy of detection, and extends the service life of the elastic probe 116. It ensures reliable electrical contact with the terminal post, avoids surface damage to the terminal post that may be caused by rigid contact, and compensates for the height inconsistency between battery terminals. It simplifies the transmission chain and reduces the complexity of the mechanism and manufacturing costs.

[0045] Reference Figures 5-6 The centering mechanism 12 is disposed on one of the sets of detection components. During the detection phase, the centering mechanism 12 is attached to both sides of the lithium battery terminal and drives the detection components to center with the lithium battery terminal. The centering mechanism 12 includes an extension plate 121 and a lifting plate 122. The extension plate 121 is symmetrically mounted on the mounting bracket 115 on one of the sets of detection components. The lifting plate 122 is slidably connected to the extension plate 121 and the lifting plate 122 is perpendicular to the extension plate 121. A first spring 123 is installed between the top of the lifting plate 122 and the extension plate 121.

[0046] In this method, the physical boundary of the electrode post itself is used as the positioning reference. The lateral position of the detection component is corrected to the symmetry center of the electrode post through mechanical feedback. When the detection component descends to near the electrode post, the centering mechanism 12 first contacts the two sides of the electrode post. If there is a lateral deviation of the elastic probe 116, the centering mechanism 12 will generate lateral displacement feedback due to the reaction force of the electrode post, which will drive the detection component to move laterally until the elastic probe 116 is aligned with the electrode post. This eliminates the probe misalignment problem caused by battery clamping error or electrode post position tolerance, realizes automatic and precise alignment of the detection component relative to the electrode post, and improves the detection success rate and repeatability.

[0047] When the detection component descends, the lifting plate 122 first approaches the terminal post. After alignment, the locking between the lifting plate 122 and the extension plate 121 is released, and the first spring 123 pushes the lifting plate 122 back to the initial low position, so that the alignment mechanism 12 can adapt to the differences in terminal post height of different types of lithium batteries, improve the versatility and compatibility of the device, and at the same time, the first spring 123 facilitates the reset after the detection is completed, which facilitates the alignment of the terminal post in subsequent lithium battery detection.

[0048] Reference Figure 6It also includes a slide rod 124 and a wedge block 126. The slide rod 124 is slidably connected to the lifting plate 122. The wedge block 126 is installed on the side of the slide rod 124 that is close to each other. A second spring 125 is installed between the end of the slide rod 124 and the lifting plate 122. A pressing member 127 is provided on the side of the wedge block 126 that is close to each other. A ratchet 128 is provided on the lifting plate 122. A hydraulic locking member 129 is installed on the side of the extension plate 121 that is close to the ratchet 128. A cavity matching the pressing member 127 is opened inside the wedge block 126. The cavity is connected to the hydraulic locking member 129 through a pipe. An adjusting rod 118 is installed on the deflection assembly on the base 1. The end of the adjusting rod 118 is connected to the lifting device 114. The adjusting rod 118 is connected to the connecting telescopic member 117 at the centering mechanism 12 through a pipe.

[0049] When the inclined surface of the wedge block 126 contacts the pole post, the normal reaction force of the pole post on the inclined surface generates a horizontal component force, causing the detection assembly to move as a whole until the elastic probe 116 is above the pole post. If the diameter of the pole post is too large, it will push the slide rod 124 to adjust the position of the wedge block 126, avoiding large friction between the wedge block 126 and the pole post. By utilizing the self-centering characteristic of the wedge block 126, the lateral positioning error of the pole post is converted into a detectable and correctable mechanical displacement. The structure is simple and the centering accuracy is high.

[0050] Once the elastic probe 116 is aligned, as it continues to descend, the circumferential direction of the electrode post will compress the extruder 127, and hydraulic oil will be delivered through the pipeline to the hydraulic locking member 129, driving the hydraulic locking member 129 to disengage from the ratchet 128. It should be explained that the hydraulic locking member 129 includes two chambers. When hydraulic oil is delivered to the chamber near the ratchet 128, it will drive the hydraulic locking member 129 to retract, thereby releasing the lock on the lifting plate 122. That is, when the bottom of the wedge block 126 contacts the top of the lithium battery, the lifting plate... As the elastic probe 116 descends, 122 moves upward along the extension plate 121, thereby preventing the wedge block 126 from damaging the top of the lithium battery and avoiding wear between the wedge block 126 and the terminal post, ensuring the stability of the detection process. Utilizing the high responsiveness and self-locking characteristics of hydraulic transmission, it achieves rapid triggering and reliable holding of centering lock. Moreover, the pipeline layout is flexible and not limited by the space of the mechanism. It does not require an additional hydraulic pump or solenoid valve. It uses the movement of the mechanism itself to generate hydraulic power, achieving natural synchronization of detection and centering actions and energy-saving operation.

[0051] Reference Figure 1 and Figure 7A temperature sensing mechanism 14 is disposed on the transverse clamping assembly. When the longitudinal clamping assembly is in contact with the lithium battery, the temperature sensing mechanism 14 is driven to move to the center position of the lithium battery sidewall. The temperature sensing mechanism 14 includes a movable seat 141 and a movable gear 142. A groove 13 is provided on the transverse clamping assembly. The movable seat 141 is slidably connected to the groove 13. The movable gear 142 is rotatably connected to the movable seat 141. A fixed toothed plate 143 is installed at the bottom of the groove 13. A drive toothed plate 144 is installed on the longitudinal clamping assembly. The drive toothed plate 144 and the fixed toothed plate 143 are respectively meshed with the symmetrical positions of the movable gear 142. A temperature sensing probe 145 is inserted into the movable seat 141. A third spring 146 is installed between the temperature sensing probe 145 and the movable seat 141.

[0052] During operation, the moving gear 142 rotates under the action of the drive gear plate 144, and the gear teeth mesh with the fixed gear plate 143 at the bottom of the groove 13, pushing the moving seat 141 to slide linearly along the groove 13. This converts the large stroke motion of the first clamp 4 into the precise small stroke motion of the moving seat 141, which facilitates the precise positioning of the temperature sensor 145. When the drive gear plate 144 moves with the first clamp 4, the moving gear 142 rolls and rotates on the fixed gear plate 143, pushing the moving seat 141 to move relative to the fixed gear plate 143, forming a transmission relationship similar to a planetary gear system. The center point (i.e., the moving seat 141) moves at half the displacement of the drive gear plate 144, so that the moving distance of the temperature sensor 145 is proportional to the stroke of the first clamp 4, ensuring that the temperature sensor 145 is always positioned at the center of the lithium battery sidewall no matter how the battery length changes, thus achieving adaptive center positioning of the battery length.

[0053] The temperature sensor 145 is a temperature-sensitive element responsible for collecting temperature signals from the sidewall of the battery. The third spring 146 allows the temperature sensor 145 to adhere to or approach the battery surface with appropriate pressure, while compensating for the unevenness of the battery surface. When the temperature sensor 145 contacts the battery, the third spring 146 is compressed to form a flexible contact, which adheres to the battery surface with constant pressure for temperature measurement. The elastic floating installation ensures reliable thermal contact between the temperature sensor 145 and the battery surface, improving the accuracy of temperature measurement, while avoiding the possibility of rigid contact damaging the battery casing or the temperature sensor 145. At the same time, the plug-in structure facilitates quick replacement and maintenance of the probe.

[0054] Components not described in detail in this article are existing technologies.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium battery testing device, comprising a base (1), characterized in that, Also includes: The clamping part includes a horizontal clamping assembly and a vertical clamping assembly, both of which are disposed on the base (1) and are distributed in a vertically staggered manner; The central part is located on the base (1) and the longitudinal clamping assembly. When the transverse clamping assembly is attached to the lithium battery, the central part is driven to move to both sides of the longitudinal center position of the lithium battery. The detection mechanism (11) is disposed on the central part, and the detection mechanism (11) includes a reversing component and a detection component. During the clamping stage, the detection component faces the outside of the base (1). During the detection stage, the detection component extends downward and adjusts the angle between itself and the base (1) through the reversing component, so that the detection component swings above the lithium battery. The centering mechanism (12) is disposed on one of the detection components. During the detection phase, the centering mechanism (12) is attached to both sides of the lithium battery terminal and drives the detection components to center with the lithium battery terminal. The temperature sensing mechanism (14) is disposed on the transverse clamping assembly. When the longitudinal clamping assembly is attached to the lithium battery, the temperature sensing mechanism (14) is driven to move to the center position of the lithium battery sidewall.

2. The lithium battery testing device according to claim 1, characterized in that, Both the transverse clamping assembly and the longitudinal clamping assembly include a guide groove (2) and a drive screw (3). The guide groove (2) is symmetrically opened on the inner wall of the base (1). The drive screw (3) is rotatably connected in the guide groove (2). A first clamp (4) is provided in the guide groove (2) along the vertical direction of the two poles of the lithium battery.

3. The lithium battery testing device according to claim 2, characterized in that, A second clamp (5) is provided in the guide groove (2) along the direction of the two poles of the lithium battery. The second clamp (5) is perpendicular to the first clamp (4) and the second clamp (5) is located above the first clamp (4). The first clamp (4) and the second clamp (5) are threadedly connected to the drive screw (3) in the corresponding guide groove (2).

4. The lithium battery testing device according to claim 3, characterized in that, The central part includes a slide groove (6), which is respectively opened on the base (1) and the longitudinal clamping assembly. The two slide grooves (6) are arranged in parallel. The reversing assembly is slidably connected to the slide groove (6). A driven screw (7) is rotatably connected in the slide groove (6) on the base (1). The reversing assembly is threadedly connected to the driven screw (7). A linkage (8) is provided between the shaft end of the driven screw (7) and the shaft end of the corresponding drive screw (3) to drive the driven screw (7) and the drive screw (3) to rotate in a linkage and change speed.

5. A lithium battery testing device according to claim 4, characterized in that, It also includes a double-chamber hydraulic rod (9) and a telescopic rod (10). One end of the double-chamber hydraulic rod (9) is connected to the base (1), and the other end of the double-chamber hydraulic rod (9) is connected to the reversing assembly on the driven screw (7). One end of the telescopic rod (10) is connected to the longitudinal clamping assembly, and the other end of the telescopic rod (10) is connected to the reversing assembly on the longitudinal clamping assembly. One of the chambers of the double-chamber hydraulic rod (9) is connected to the telescopic rod (10) through a pipe to drive the two reversing assemblies to move synchronously.

6. A lithium battery testing device according to claim 1, characterized in that, The reversing assembly includes a support column (111), a mounting base (112), and a collar (119).

7. A lithium battery testing device according to claim 6, characterized in that, The mounting base (112) is rotatably connected to the support column (111), and the collar (119) is sleeved on the support column (111). The support column (111) has a spiral groove (1110) and a lifting groove (1111) symmetrically arranged. The spiral groove (1110) and the lifting groove (1111) are connected. The inner wall of the collar (119) is symmetrically equipped with a limiting block (1112). The limiting block (1112) matches the spiral groove (1110) and the lifting groove (1111). A connecting telescopic component (117) is installed on the collar (119).

8. A lithium battery testing device according to claim 7, characterized in that, The detection component includes a lifting device (114), a guide rail (113) is provided on the mounting base (112), the lifting device (114) is slidably connected to the mounting base (112) through the guide rail (113), a mounting frame (115) is installed at the output end of the lifting device (114), an elastic probe (116) is installed on the mounting frame (115), and one end of the connecting telescopic member (117) is connected to the mounting frame (115).

9. A lithium battery testing device according to claim 8, characterized in that, The centering mechanism (12) includes an extension plate (121) and a lifting plate (122). The extension plate (121) is symmetrically mounted on a mounting bracket (115) on one of the detection components. The lifting plate (122) is slidably connected to the extension plate (121), and the lifting plate (122) and the extension plate (121) are vertically distributed. A first spring (123) is installed between the top of the lifting plate (122) and the extension plate (121).

10. A lithium battery testing device according to claim 9, characterized in that, It also includes a slide rod (124) and a wedge block (126). The slide rod (124) is slidably connected to the lifting plate (122). The wedge block (126) is installed on the side of the slide rod (124) that is close to each other. A second spring (125) is installed between the end of the slide rod (124) and the lifting plate (122). A pressing member (127) is provided on the side of the wedge block (126) that is close to each other. A ratchet (128) is provided on the lifting plate (122). A hydraulic locking member (129) is installed on the side of the extension plate (121) that is close to the ratchet (128). The wedge block (126) has a cavity inside that matches the extrusion member (127), and the cavity is connected to the hydraulic locking member (129) through a pipe.

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