Testing device compatible with cylindrical batteries of multiple specifications

Abstract

The utility model discloses a testing device compatible with cylindrical batteries of multiple specifications. The testing device comprises a limiting clamping structure used for supporting and clamping the two ends of each battery and a testing probe structure used for pressing the end faces of the two ends of each battery. The length of the cylindrical battery is matched by adjusting the distance between the two clamping assemblies, and the cylindrical battery can be limited, supported and clamped by placing the cylindrical battery on the two opposite battery supporting grooves of the two clamping assemblies. And different battery supporting grooves are matched with cylindrical batteries with different sizes and different models, so that the compatibility is high. Meanwhile, the distance between the test probes is adjusted to enable the test probes to abut against the positive and negative electrodes of the cylindrical batteries with different sizes and different models so as to test the cylindrical batteries. The testing device is novel in structure, easy to operate, convenient to adjust, small in occupied space and low in manufacturing cost, the limiting clamping testing requirements of the cylindrical batteries of multiple specifications and sizes are met, and the testing efficiency of the cylindrical batteries of different sizes and different models is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a testing device compatible with cylindrical batteries of multiple specifications. Background Art

[0002] Cylindrical batteries boast mature production processes, low pack costs, and high battery yield and pack consistency. Cylindrical batteries are easily adaptable to various configurations and are well-suited to the spatial design and layout of electric vehicles. With the continued expansion of the electric vehicle market and increasing demands for range, vehicle manufacturers are placing higher demands on power battery energy density, manufacturing costs, cycle life, and product attributes.

[0003] Taking cylindrical lithium batteries as an example, their models include 32140 / 4680 / 4695 / 60200, etc. These cylindrical lithium batteries need to be charged and discharged during the research and development and production process. The current cylindrical battery test on the market is achieved by fitting probes to the positive and negative poles of the cylindrical battery. One side of the positive and negative probes uses a spring-loaded structure. By pressing the probes against the poles, the springs shrink to a certain stroke, thereby clamping the battery for testing. Most existing technologies use horizontal test fixtures to clamp cylindrical batteries of different diameters. This fixture requires replacing insulating limit blocks for batteries of different diameters. The replacement steps are cumbersome, not only costly, but also difficult to store. Some test fixtures use two parallel vertical plates. The space between the two vertical plates is the battery accommodating cavity. When testing batteries of different diameters, the size of the accommodating cavity needs to be adjusted, and the center position of the probe needs to be adjusted. Aligning the battery poles requires frequent corrections to the position of the battery and the fixture, which affects the test efficiency, and the fixture occupies a large volume.

[0004] Therefore, designing a cylindrical battery testing device and a method for using the same with strong compatibility, simple operation, small space occupation and low production cost is an urgent problem to be solved. Utility Model Content

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a testing device that is simple to operate, occupies a small space, has a low production cost and is compatible with multiple specifications of cylindrical batteries.

[0006] To achieve this purpose, the test device designed by the present invention is compatible with cylindrical batteries of multiple specifications and includes a limiting clamping structure for supporting and clamping both ends of the battery and a test probe structure for pressing the end faces of both ends of the battery; the limiting clamping structure includes one or more groups of clamping components, each group of clamping components includes two clamping components arranged opposite each other and movable toward or away from each other, and one or more pairs of battery support slot groups are provided on the two clamping components, and each pair of battery support slot groups includes battery support slot groups respectively arranged on the two clamping components and arranged opposite each other, and each battery support slot group includes a plurality of battery support slots of different sizes arranged concentrically and perpendicular to the moving direction of the clamping components; the test probe structure includes one or more pairs of test probes, each pair of test probes includes two test probes arranged opposite each other, movable toward or away from each other, located on the outside of the two battery support slot groups of the same pair, and arranged concentrically with the battery support slots; the limiting clamping structure and the test probe structure are arranged on a test device bracket.

[0007] Furthermore, the clamping assembly includes a limiting frame with a limiting piece installation slot opened in the middle and one or more limiting pieces detachably fixed in the limiting piece installation slot; the battery support slot includes a limiting piece battery support slot opened on the limiting piece.

[0008] Furthermore, the battery support groove also includes a limiting frame battery support groove opened on both axial side surfaces of the limiting frame.

[0009] Furthermore, the testing device compatible with multiple specifications of cylindrical batteries also includes a distance adjustment component that can guide the movement of the clamping assembly, adjust the relative position of the two clamping assemblies in the same group and position them; each group of the clamping assemblies includes a first clamping assembly and a second clamping assembly, and the distance adjustment assembly includes a distance adjustment rod arranged along the moving direction of the clamping assembly and passing through the first clamping assembly and the second clamping assembly; a first distance adjustment positioning structure is connected between the distance adjustment rod and the first clamping assembly, and a second distance adjustment positioning structure is connected between the distance adjustment rod and the second clamping assembly.

[0010] Furthermore, the distance-adjusting rod includes a threaded rod section and a polished rod section, the threaded rod section passes through the first clamping assembly, and the polished rod section passes through the second clamping assembly; a first distance-adjusting positioning structure is connected between the threaded rod section and the first clamping assembly, and a second distance-adjusting positioning structure is connected between the polished rod section and the second clamping assembly.

[0011] Furthermore, the first distance adjustment and positioning structure includes at least two locking nuts threadedly connected to the threaded rod segment and located on the axial front and rear sides of the first clamping assembly.

[0012] Furthermore, the second clamping assembly is detachably fixed to the end of the polished rod section through the second distance adjustment positioning structure, and includes a second clamping assembly fixing plate detachably fixed to the end of the polished rod section, and the second clamping assembly is detachably fixed to the second clamping assembly fixing plate.

[0013] Furthermore, each pair of the test probes includes a first test probe and a second test probe, the first test probe is fixed to the power output end of the probe pushing structure, and the first test probe can move relative to the second test probe through the probe pushing structure.

[0014] Furthermore, the probe pushing structure includes a quick mounting clamp, which is fixed on a mounting clamp fixing bracket that can move back and forth and position along the movement direction of the test probe. The quick mounting clamp includes a push rod that can move back and forth along the movement direction of the test probe and passes through the mounting clamp fixing bracket, and the first test probe is fixed on the push rod.

[0015] Furthermore, the testing device compatible with multiple specifications of cylindrical batteries also includes a guide assembly for guiding the movement of the limiting clamping structure and the test probe structure, the test probe structure includes one or more pairs of probe fixing plates, each pair of probe fixing plates includes two probe fixing plates arranged opposite each other, which can move toward or away from each other and are used to fix the test probes, and the guide assembly includes one or more guide rods that vertically pass through at least one group of the clamping assemblies and a pair of the probe fixing plates.

[0016] The beneficial effects of the present invention are as follows: by adjusting the distance between the two clamping assemblies to match the length of the cylindrical battery, the cylindrical battery can be placed on the two opposite battery support grooves of the two clamping assemblies to complete the limited support and clamping of the cylindrical battery. Different battery support grooves are used to match cylindrical batteries of different sizes and models, and the compatibility is strong. At the same time, by adjusting the distance between the test probes, the test probes are pressed against the positive and negative poles of cylindrical batteries of different sizes and models to test the cylindrical batteries. The test device has a novel structure, simple operation, convenient adjustment, small space occupation, and low production cost. It meets the limited clamping test requirements of cylindrical batteries of multiple specifications and sizes, and effectively improves the testing efficiency of cylindrical batteries of different sizes and models. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural stereogram of the testing device for cylindrical batteries of various specifications in the present invention;

[0018] Figure 2 This is a structural perspective diagram of the test device bracket in the present utility model;

[0019] Figure 3This is a three-dimensional diagram of the position limiting clamping structure of the utility model;

[0020] Figure 4 This is a perspective view of the relative arrangement of two clamping components of the position limiting clamping structure of the present invention;

[0021] Figure 5 This is a perspective view of the relative arrangement structure of two limiting frames of the limiting clamping structure of the present invention;

[0022] Figure 6 This is a perspective view of the relative arrangement structure of two limiting pieces of the limiting clamping structure of the present utility model;

[0023] Figure 7 This is a three-dimensional diagram of the distance adjustment rod in the utility model;

[0024] Figure 8 This is a three-dimensional diagram of the fixing plate of the second clamping assembly in the present invention;

[0025] Figure 9 This is a three-dimensional diagram of the mounting clip fixing bracket in the present utility model;

[0026] Figure 10 This is a three-dimensional diagram of the first test probe fixing plate in the present invention;

[0027] Figure 11 This is a three-dimensional diagram of the test assembly structure of the cylindrical battery to be tested in the present invention;

[0028] Figure 12 This is a three-dimensional diagram of the test assembly structure of the cylindrical battery to be tested in the present invention;

[0029] Figure 13 This is a three-dimensional diagram of the test assembly structure of the cylindrical battery to be tested in the present invention;

[0030] Among them, 101—first clamping assembly, 102—second clamping assembly, 103—limiting plate battery support slot, 104—limiting plate mounting slot, 105—limiting frame, 106—limiting plate, 107—adjustable rod (107.1—threaded rod section, 107.2—smooth rod section), 108—locking nut, 109—second clamping assembly fixing plate, 110—adjustable rod threaded hole, 111—bolt positioning countersunk hole, 112—bolt through hole, 113—adjustable rod mounting hole, 114—fixing plate first countersunk hole, 115—fixing plate second countersunk hole, 116—frame threaded hole, 117—limiting frame battery support slot;

[0031] 201 - first test probe, 202 - second test probe, 203 - quick-installation clamp, 204 - mounting clamp fixing bracket, 205 - push rod, 206 - guide rod, 207 - first test probe fixing plate, 208 - second test probe fixing plate, 209 - thumb screw, 210 - device base, 211 - base fixing hole, 212 - waist-shaped hole, 213 - guide rod through hole, 214 - pitch adjustment rod through hole, 215 - thumb screw threaded hole, 216 - guide rod fixing hole;

[0032] 301 - cylindrical battery 1 to be tested, 302 - cylindrical battery 2 to be tested, 303 - cylindrical battery 3 to be tested. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1 As shown in FIG10 , the test device for cylindrical batteries of various specifications designed by the present invention includes the following three embodiments:

[0035] Example 1:

[0036] The testing device compatible with cylindrical batteries of multiple specifications includes a limiting clamping structure for supporting and clamping both ends of the battery and a testing probe structure for pressing the end faces of both ends of the battery.

[0037] The limiting clamping structure includes two clamping components that are arranged opposite each other and can move toward or away from each other; each of the two clamping components is provided with a battery support slot group that is arranged opposite each other, and each battery support slot group includes a plurality of battery support slots 103 of different sizes that are arranged concentrically and perpendicular to the moving direction of the clamping component; the clamping component includes a limiting frame 105 with a limiting plate mounting slot 104 in the middle and one or more limiting plates 106 that can be detachably fixed in the limiting plate mounting slot 104; a battery support slot 103 is respectively provided on the groove surfaces on both sides of the axial direction of the limiting plate mounting slot 104, and a battery support slot 103 is provided on each limiting plate 106.

[0038] The test probe structure includes two test probes arranged opposite each other, movable toward or away from each other, located on the outside of the two battery support slot groups, and arranged concentrically with the battery support slots. The test probes include a first test probe 201 and a second test probe 202. The first test probe 201 is fixed to the power output end of the probe push structure. The first test probe 201 can be moved relative to the second test probe 202 via the probe push structure. The probe push structure includes a quick installation clamp 203, which is fixed to a mounting clamp fixing bracket 204 that can reciprocate and position along the direction of movement of the test probes. The quick installation clamp 203 includes a push rod 205 that can reciprocate along the direction of movement of the test probes and passes through the mounting clamp fixing bracket 204. The first test probe 201 is fixed to the push rod 205.

[0039] Example 2:

[0040] Its overall structure is basically the same as that of Example 1, except that it also includes a distance-adjusting component that can guide the movement of the clamping component, adjust the relative position of the two clamping components and position them; the clamping component includes a first clamping component 101 and a second clamping component 102, and the distance-adjusting component includes a distance-adjusting rod 107 arranged along the moving direction of the clamping component and passing through the first clamping component 101 and the second clamping component 102; a first distance-adjusting positioning structure is connected between the distance-adjusting rod 107 and the first clamping component 101, and a second distance-adjusting positioning structure is connected between the distance-adjusting rod 107 and the second clamping component 102. The pitch-adjusting rod 107 includes a threaded rod section 107.1 and a polished rod section 107.2. The threaded rod section 107.1 passes through the first clamping assembly 101, and the polished rod section 107.2 passes through the second clamping assembly 102. A first pitch-adjusting positioning structure is connected between the threaded rod section 107.1 and the first clamping assembly 101, and a second pitch-adjusting positioning structure is connected between the polished rod section 107.2 and the second clamping assembly 102. The first pitch-adjusting positioning structure includes two locking nuts 108 threadedly connected to the threaded rod section 107.1 and located on the axial front and rear sides of the first clamping assembly 101. The second clamping assembly 102 is detachably fixed to the end of the polished rod section 107.2 by the second pitch-adjusting positioning structure. It includes a second clamping assembly fixing plate 109 detachably fixed to the end of the polished rod section 107.2. The second clamping assembly 102 is detachably fixed to the second clamping assembly fixing plate 109.

[0041] Example 3:

[0042] Its overall structure is basically the same as that of Example 2, except that it also includes a guide assembly for guiding the movement of the limiting clamping structure and the test probe structure. The test probe structure includes two probe fixing plates that are arranged opposite each other and can move toward or away from each other and are used to fix the test probes. The guide assembly includes one or more guide rods 206 that vertically pass through a clamping assembly and a probe fixing plate.

[0043] The structure of the third embodiment is described below:

[0044] like Figure 1 As shown in FIG10, the test device designed by the present invention is compatible with multiple specifications of cylindrical batteries. Figure 2 The test device bracket shown is based on the test device bracket, which includes a device base 210 and a second test probe fixing plate 208. The test device bracket is formed by cold plate bending, welded at the seams, and sprayed with plastic powder on the outer surface. Four base fixing holes 211 are provided on the bottom plate of the device base 210, and the device base 210 can be fixed to the test fixture by bolts. Two guide rod fixing holes 216 are respectively provided on the side wall of the device base 210 and the second test probe fixing plate 208. Guide rod threaded holes are provided at both ends of the guide rods 206. The two guide rods 206 can be fixed to the device base 210 at both ends by bolts, guide rod fixing holes 216 and guide rod threaded holes. A waist-shaped hole 212 is provided at the lower part of the second test probe fixing plate 208 to allow maintenance of the distance adjustment rod 107 and the second clamping assembly fixing plate 109.

[0045] like Figure 3 As shown in FIG. 8 , the limiting clamping structure includes two first clamping assemblies 101 and a second clamping assembly 102 arranged opposite each other. The first clamping assembly 101 and the second clamping assembly 102 each include a limiting frame 105 with a limiting piece mounting slot 104 provided in the middle thereof and one or more limiting pieces 106 detachably fixed in the limiting piece mounting slot 104 (bolts pass through the bolt positioning countersunk holes 111 and the bolt through holes 112 of the limiting piece 106 and are connected to the frame threaded holes 116). A battery support slot 103 is provided on each axial side groove surface of the limiting piece mounting slot 104, and a battery support slot 103 is provided on each limiting piece 106. The battery support groove 103 is a semicircular groove, corresponding to the outer surface shape of the cylindrical battery. The battery support groove 103 gradually decreases from the inside to the outside of the clamping assembly. The axial surface of the outer limiting piece 106 or the limiting frame 105 becomes the limiting surface of the axial surface of the inner limiting piece 106 or 105, which is used to clamp the end faces of the cylindrical battery (such as Figure 11—13). The threaded rod section 107.1 of the pitch-adjusting rod 107 passes through the first clamping assembly 101, and the polished rod section 107.2 passes through the second clamping assembly 102. The first clamping assembly 101 is movable on the pitch-adjusting rod 107, and the second clamping assembly 102 is fixed to the end of the pitch-adjusting rod 107. According to the diameter of the cylindrical battery to be tested, one end of the cylindrical battery to be tested is placed in a battery support groove 103 of the second clamping assembly 102 to support the end of the cylindrical battery to be tested. The position of the first clamping assembly 101 on the pitch-adjusting rod 107 is then adjusted according to the height and length of the cylindrical battery to be tested. Two locking nuts 108 are located on the axial front and rear sides of the first clamping assembly 101. After the position of the first clamping assembly 101 is adjusted, the locking nuts 108 are used to lock the first clamping assembly 101, so that the first clamping assembly 101 is positioned on the pitch-adjusting rod 107. The first clamping assembly 101 and the second clamping assembly 102 form a storage compartment for the cylindrical battery to be tested. The limiting frame 105 and limiting plate 106 are both made of black Bakelite. The opening width of the limiting plate mounting slot 104 can be increased to accommodate more limiting plates 106. Two or three limiting plates 106 can be used in combinations depending on the battery diameter. Two circular holes are located on the left and right sides of the bottom of the limiting frame 105. These holes are slightly larger than the outer diameter of the guide rod 216, allowing the limiting frame 105 to slide freely on the guide rod 216.

[0046] like Figure 1 and Figure 9As shown in FIG10 , the test probe structure includes two first test probe fixing plates 207 and the second test probe fixing plates 208 arranged opposite to each other and movable toward or away from each other for fixing the test probes. The first test probe fixing plates 207 and the second test probe fixing plates 208 are respectively vertically fixed with the first test probe 201 and the second test probe 202. The first test probe 201 and the second test probe 202 are arranged opposite to each other. The sizes of the first test probe 201 and the second test probe 202 are smaller than the size of the smallest battery support groove 103. The second test probe 202 is fixed and can move relative to or away from the second test probe 202. The two guides The rod 206 is provided with a mounting clamp fixing bracket 204 (guide rod through-holes 213 are provided on the left and right sides of the bottom of the mounting clamp fixing bracket 204) and the above-mentioned first test probe fixing plate 207 (guide rod through-holes 213 are provided on the left and right sides of the bottom of the first test probe fixing plate 207) which can move along the guide rod 206. The middle part of the bottom of the mounting clamp fixing bracket 204 and the middle part of the bottom of the first test probe fixing plate 207 are both provided with distance adjustment rod through-holes 214. The mounting clamp fixing bracket 204 and the first test probe fixing plate 207 can avoid the protruding part of the distance adjustment rod 107 during the sliding process, thereby preventing the distance adjustment rod 107 from interfering with the mounting clamp fixing bracket 204 and the first test probe fixing plate 207. A quick-installation clamp 203 is fixed to the mounting clamp bracket 204. The push rod of the quick-installation clamp 203 is fixedly connected to the first test probe fixing plate 207. Manually actuating the quick-installation clamp 203 pushes the first test probe fixing plate 207 and the first test probe 201 toward the cylindrical battery, pressing against the end face of the cylindrical battery. The first test probe fixing plate 207 is made of black bakelite, and the mounting clamp bracket 204 is made of aluminum alloy. Two thumb screw threaded holes 215 are located above the guide rod 206 on the quick-installation clamp bracket 204. Turning the thumb screws 209 secures the mounting clamp bracket 204 to the guide rod 206.

[0047] The method of using the testing device for cylindrical batteries of multiple specifications based on the third embodiment is as follows: Figure 11As shown in FIG13 , one end of the cylindrical battery to be tested is placed in a battery support groove 103 of the second clamping assembly 102 according to the diameter of the cylindrical battery to be tested, supporting one end of the cylindrical battery to be tested, and then the position of the first clamping assembly 101 on the distance adjustment rod 107 is adjusted according to the height and length of the cylindrical battery to be tested. Two locking nuts 108 are on the axial front and rear sides of the first clamping assembly 101. After adjusting the position of the first clamping assembly 101, the first clamping assembly 101 is locked by the locking nuts 108 to position the first clamping assembly 101 on the distance adjustment rod 107. The first clamping assembly 101 and the second clamping assembly 102 form a storage compartment for the cylindrical battery to be tested. The second test probe 202 contacts the right end of the cylindrical battery to be tested, and the mounting clamp fixing bracket 204 is adjusted to a position that meets the working stroke of the test probe. The two hand screws 209 are turned to fix the mounting clamp fixing bracket 204 on the guide rod 206, and the quick mounting clamp 203 is pushed. The first test probe fixing plate 207 fixedly connected to the push rod 205 of the quick mounting clamp 203 drives the first test probe 201 to move toward the side of the cylindrical battery to be tested. The first test probe 201 is attached to the left end face of the cylindrical battery to be tested, and the right end of the cylindrical battery to be tested pushes the second test probe 202. The second test probe 202 is compressed to the working stroke. At this time, the clamping operation of the cylindrical battery to be tested is completed, and the battery testing equipment can be used to perform various tests on the cylindrical battery to be tested.

[0048] Based on the above embodiment 3, in actual application, in order to more efficiently meet the needs of cylindrical batteries of different specifications, one or more groups of clamping assemblies can be arranged on the same test device bracket, and at the same time, two clamping assemblies in the same group can be provided with one or more pairs of battery support slots arranged opposite to each other. According to the number of clamping assemblies, one or more pairs of test probes can be arranged on the test device bracket. For example, Figure 11 — Figure 13 The test device shown is integrated into one body, and three test device brackets are formed into an integrated structure by welding, riveting or integrated manufacturing. Then, based on the integrated test device bracket, three groups of clamping components and three pairs of test probes are arranged.

[0049] When clamping and positioning two or more cylindrical batteries of different lengths and diameters, the two or more cylindrical batteries can be placed in the battery support slots of two or more sets of clamping assemblies and clamped and positioned simultaneously. Two or more pairs of test probes are used to press and contact the positive and negative electrodes of each cylindrical battery.

[0050] When clamping and limiting two or more cylindrical batteries of the same length but different diameters, the two or more cylindrical batteries can be placed separately in the battery support grooves of two or more groups of clamping assemblies and clamped and limited at the same time; or the two or more cylindrical batteries can be placed separately in different pairs of battery support grooves of two clamping assemblies in the same group and clamped and limited at the same time. The positive and negative electrodes of each cylindrical battery are pressed and contacted by two or more pairs of test probes.

[0051] When clamping and positioning two or more cylindrical batteries of different lengths but the same diameter, the two or more cylindrical batteries can be placed in the battery support grooves of two or more sets of clamping assemblies and clamped and positioned simultaneously. Two or more pairs of test probes are used to press and contact the positive and negative electrodes of each cylindrical battery.

[0052] Based on the above-mentioned embodiment 3, in actual application, in order to more efficiently adapt to the needs of cylindrical batteries of different specifications, the limiting clamping structure is designed with a mechanism for quickly replacing the limiting plates. Specifically, the limiting plate mounting groove 104 on each limiting frame 105 not only facilitates the installation and removal of the limiting plate 106, but also allows the user to flexibly increase or decrease the number of limiting plates according to the battery diameter through the adjustability of its opening width. This design significantly improves the versatility and adaptability of the device, and can clamp batteries of various specifications without replacing the entire clamping assembly.

[0053] Furthermore, to further enhance operational convenience, the distance adjustment rod 107 in the distance adjustment assembly can be equipped with a scale mark or pointer, allowing the user to intuitively understand and adjust the relative distance between the two clamping assemblies. This detailed design allows the user to quickly and accurately set the distance between the clamping assemblies based on the length of the cylindrical battery to be tested, thereby improving work efficiency and test accuracy.

[0054] In terms of safety, considering the potential risks during battery testing, the limiting clamping structure also uses non-conductive materials (such as black bakelite) as the main materials for the limiting frame 105 and the limiting plate 106. This choice not only ensures the equipment's electrical safety compliance, but also effectively avoids potential short circuit risks caused by the material's conductivity, providing additional safety during the testing process.

[0055] Finally, to enhance the stability and durability of the device, all key components, such as the pitch-adjusting rod 107, locking nut 108, and second clamping assembly fixing plate 109, are made of high-strength, corrosion-resistant materials and precision-machined to ensure close fit and smooth operation. These design measures work together to ensure that the multi-size cylindrical battery-compatible limited clamping structure designed in this utility model maintains stable performance under various complex operating conditions, meeting the needs of long-term, high-frequency use.

[0056] To further optimize and expand the functionality and adaptability of the test device to meet more diverse testing needs, the following improvements can be made to the test device:

[0057] 1. Add an automatic distance adjustment system

[0058] To improve operational efficiency and accuracy, an automatic pitch adjustment system can be introduced to replace manual adjustment. This system includes a motor-driven lead screw mechanism. Programmable forward and reverse motor rotation drives the lead screw, thereby precisely adjusting the position of the first clamping assembly 101 on the pitch adjustment rod 107. Built-in sensors monitor the position of the first clamping assembly 101 in real time, ensuring that each adjustment reaches the preset value and reducing human error.

[0059] 2. Probe pressure regulation and protection mechanism

[0060] A pressure sensor and feedback control system are added to the test probe structure. When the first test probe 201 contacts the end face of the cylindrical battery, the pressure sensor detects the contact force and transmits the signal to the control system. If the contact force exceeds a preset safety threshold, the system automatically slows or stops the probe advancement to avoid damage to the battery. At the same time, the first test probe 201 and the second test probe 202 are equipped with a spring buffer device to absorb impact during the test and protect the probes and the battery being tested.

[0061] 3. Diversified Probe Configuration

[0062] To meet the needs of different cylindrical battery sizes and different test projects, we designed replaceable probe modules. Each probe module contains test probes of different sizes, materials, or shapes to accommodate batteries of different diameters and heights or to perform specific tests (such as internal resistance, voltage, and capacity tests). Users can quickly replace probe modules according to actual needs, improving the flexibility and versatility of the test device.

[0063] 4. Intelligent test interface and data management

[0064] The integrated touchscreen control panel or PC-based software provides an intuitive and easy-to-use user interface, enabling one-click testing start-up, real-time test data monitoring, automatic result recording, and test report generation. The system supports multiple data export formats for convenient data analysis and archiving. Furthermore, cloud synchronization allows users to upload test data to a cloud server, enabling remote access and multi-person collaboration.

[0065] 5. Enhanced environmental adaptability

[0066] To address specific testing environments (such as high and low temperatures, and humidity control), the test equipment was modified accordingly. For example, a temperature control system was added to the device housing to ensure a stable test environment. Key components were constructed using corrosion-resistant and high-temperature-resistant materials to improve the overall durability and reliability of the device. Furthermore, dust and water-resistant features were added to protect the delicate components from external influences.

[0067] Through the above improvements and expansions, the testing device compatible with multiple specifications of cylindrical batteries will have a higher degree of automation, wider adaptability, more accurate testing capabilities and more convenient data management functions, providing strong support for quality inspection in battery research and development and production processes.

[0068] In summary, the utility model matches the length of the cylindrical battery by adjusting the distance between the two clamping assemblies, and the cylindrical battery is placed on the two opposite battery support grooves 103 of the two clamping assemblies to complete the limited support and clamping of the cylindrical battery. Different battery support grooves 103 are used to match cylindrical batteries of different sizes and models, and have strong compatibility. At the same time, by adjusting the distance between the test probes, the test probes are pressed against the positive and negative poles of cylindrical batteries of different sizes and models to test the cylindrical batteries. The testing device has a novel structure, simple operation, convenient adjustment, small space occupation, and low production cost. It meets the requirements of limited clamping testing of cylindrical batteries of multiple specifications and sizes, and effectively improves the testing efficiency of cylindrical batteries of different sizes and models.

[0069] It should be noted that the description of the above technical solutions is illustrative only. This specification may be embodied in various forms and should not be construed as limiting the technical solutions set forth herein. Rather, these descriptions are provided so that the disclosure of this utility model will be thorough and complete and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, the technical solutions of the present utility model are limited only by the scope of the claims. Where the terms "including," "having," and "comprising" are used in this specification, further parts or other components may also be included. The terms used may generally be singular but may also represent the plural. It should be noted that although the terms "first," "second," "top," "bottom," "one side," "other side," "end," and "other end" may appear and be used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are used solely to distinguish one component or part from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the scope of this specification. Top and bottom components may also be interchanged or switched under certain circumstances; components at one end and at the other end may have the same or different properties.

[0070] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

1. A testing device compatible with multiple specifications of cylindrical batteries, characterized by: It includes a limit clamping structure for supporting and clamping both ends of the battery and a test probe structure for pressing the end faces of both ends of the battery; The position-limiting clamping structure includes one or more clamping assemblies, each clamping assembly includes two clamping assemblies arranged opposite to each other and movable toward or away from each other, the two clamping assemblies are provided with one or more pairs of battery support slot groups, each pair of battery support slot groups includes battery support slot groups respectively provided on the two clamping assemblies and arranged opposite to each other, and each battery support slot group includes a plurality of battery support slots of different sizes arranged concentrically and perpendicular to the moving direction of the clamping assembly; The test probe structure includes one or more pairs of test probes, each pair of test probes includes two test probes arranged opposite to each other, movable toward or away from each other, located on the outsides of two battery support slot groups in the same pair, and arranged concentrically with the battery support slots; The position limiting clamping structure and the test probe structure are arranged on a test device bracket.

2. The multi-specification cylindrical battery testing device according to claim 1, wherein: The clamping assembly comprises a limiting frame (105) with a limiting piece installation slot (104) provided in the middle thereof and one or more limiting pieces (106) detachably fixed in the limiting piece installation slot (104); the battery support slot comprises a limiting piece battery support slot (103) provided on the limiting piece (106) and limiting frame battery support slots (117) provided on both axial side surfaces of the limiting frame (105).

3. The testing device for cylindrical batteries of multiple specifications according to claim 1 or 2, characterized in that: The size of the battery supporting groove decreases from the inner side to the outer side of the clamping assembly.

4. The testing device for cylindrical batteries of various specifications as claimed in claim 1, wherein: It also includes a distance adjustment component that can guide the movement of the clamping component, adjust the relative position of two clamping components in the same group, and position them; each group of the clamping components includes a first clamping component (101) and a second clamping component (102), and the distance adjustment component includes a distance adjustment rod (107) arranged along the moving direction of the clamping component and passing through the first clamping component (101) and the second clamping component (102); a first distance adjustment positioning structure is connected between the distance adjustment rod (107) and the first clamping component (101), and a second distance adjustment positioning structure is connected between the distance adjustment rod (107) and the second clamping component (102).

5. The testing device for cylindrical batteries of various specifications as claimed in claim 4, characterized in that: The pitch-adjusting rod (107) comprises a threaded rod section (107.1) and a polished rod section (107.2); the threaded rod section (107.1) passes through the first clamping assembly (101), and the polished rod section (107.2) passes through the second clamping assembly (102); a first pitch-adjusting positioning structure is connected between the threaded rod section (107.1) and the first clamping assembly (101), and a second pitch-adjusting positioning structure is connected between the polished rod section (107.2) and the second clamping assembly (102).

6. The testing device for cylindrical batteries of various specifications as claimed in claim 5, characterized in that: The first distance adjustment and positioning structure comprises at least two locking nuts (108) threadedly connected to the threaded rod segment (107.1) and located on the axial front and rear sides of the first clamping assembly (101).

7. The testing device for cylindrical batteries of various specifications as claimed in claim 5, characterized in that: The second clamping assembly (102) is detachably fixed to the end of the polished rod section (107.2) via the second distance adjustment positioning structure, and comprises a second clamping assembly fixing plate (109) detachably fixed to the end of the polished rod section (107.2), and the second clamping assembly (102) is detachably fixed to the second clamping assembly fixing plate (109).

8. The testing device for cylindrical batteries of various specifications as claimed in claim 1, characterized in that: Each pair of test probes comprises a first test probe (201) and a second test probe (202); the first test probe (201) is fixed to a power output end of a probe push structure; and the first test probe (201) can move relative to the second test probe (202) via the probe push structure.

9. The testing device for cylindrical batteries of various specifications as claimed in claim 8, characterized in that: The probe pushing structure comprises a quick installation clamp (203), the quick installation clamp (203) being fixed on a mounting clamp fixing bracket (204) which can reciprocate and position along the moving direction of the test probe, the quick installation clamp (203) comprising a push rod (205) which can reciprocate along the moving direction of the test probe and passes through the mounting clamp fixing bracket (204), and the first test probe (201) is fixed on the push rod (205).

10. The testing device for cylindrical batteries of various specifications as claimed in claim 1, characterized in that: It also includes a guide assembly for guiding the movement of the limiting clamping structure and the test probe structure, the test probe structure includes one or more pairs of probe fixing plates, each pair of probe fixing plates includes two probe fixing plates arranged opposite to each other and movable toward or away from each other and used to fix the test probes, and the guide assembly includes one or more guide rods (206) vertically passing through at least one group of the clamping assembly and a pair of the probe fixing plates.

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