A battery short circuit testing device

Abstract

The utility model provides a kind of battery short circuit testing device, comprising: rotary drive mechanism, multiple upper pressing head components, multiple lower pressing head components, upper cam and lower cam;Part of rotary drive mechanism is rotatably penetrated in upper cam and lower cam;Multiple upper pressing head components and multiple lower pressing head components are all set on rotary drive mechanism.The battery short circuit testing device of the utility model passes through the design of insulating pad, when current is transmitted to other positions except the electric connection structure of upper test head and lower test head, insulating pad can avoid current transmission to other structures, to improve security;Battery cup is adsorbed in cup positioning groove by magnetic attraction structure, to avoid battery cup from shaking, and battery cup can be conducive to magnetic attraction structure when entering into cup positioning groove to make battery cup adhere to the inner wall of cup positioning groove, battery cup does not fall when battery cup is separated from cup positioning groove, so that battery cup handover smoothly, and it is not easy to tip over.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, specifically to a battery short-circuit testing device. Background Technology

[0002] With the surge in demand for cylindrical batteries from new energy vehicles, energy storage systems, and consumer electronics, battery safety has become a critical indicator. International standards (such as IEC 62133 and UL 1973) require that batteries not experience thermal runaway phenomena such as fire or explosion under short-circuit conditions. Therefore, short-circuit testing is an essential part of battery factory testing. The purpose of short-circuit testing is to verify the battery's safety under short-circuit conditions. A common short-circuit testing method is to directly short-circuit the positive and negative terminals of the battery and observe whether the battery has current output and whether it can normally disconnect the load and restore voltage. Accurately and quickly connecting the positive and negative terminals during short-circuit testing has become a major challenge. Traditional linear mechanical connection of the battery terminals suffers from low efficiency, damage to the current collector (leaving dents after mechanical connection), and operational safety risks. In contrast, the rotary cam structure, with its advantages of high precision, high efficiency, and high safety, has become an inevitable choice for industry upgrades.

[0003] A rotary cam structure for a battery short-circuit test device typically includes an upper cam, a lower cam, and a rotating structure. The rotating component drives multiple battery cups to rotate, while simultaneously causing the upper pressure head to rise and fall along the upper guide rail of the upper cam and the lower pressure head to rise and fall along the lower guide rail of the lower cam. The upper pressure head descends to contact the positive current collector of the battery in the battery cup, and the lower pressure head rises to contact the negative current collector of the battery in the battery cup, thus enabling a short-circuit test.

[0004] Currently, the upper and lower pressure heads are usually equipped with a connecting structure that connects to the current collector. Both the upper and lower pressure heads are electrically connected to the current collector of the battery through the connecting structure. However, due to errors or other unexpected situations, the current collector may not only come into contact with the connecting structure of the upper and lower pressure heads, which is connected to the current detection device, but the current collector may also touch the parts of the upper and lower pressure heads located around the connecting structure. This could cause the current to be transmitted to the parts of the upper and lower pressure heads other than the connecting structure, and thus to other locations. Especially when the current tester applies a strong current to the battery, if the strong current is transmitted to other locations and comes into contact with personnel, there is a great safety hazard. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a battery short-circuit testing device.

[0006] One embodiment of this utility model provides a battery short-circuit testing device, including: a rotary drive mechanism, multiple upper pressure head assemblies, multiple lower pressure head assemblies, an upper cam, and a lower cam;

[0007] A portion of the rotary drive mechanism is rotatably inserted into the upper cam and the lower cam. The rotary drive mechanism is provided with a plurality of cup-holding positioning grooves, which are arranged sequentially around the rotary drive mechanism.

[0008] Multiple upper pressure head assemblies and multiple lower pressure head assemblies are disposed on the rotary drive mechanism. The multiple upper pressure head assemblies are arranged sequentially around the rotary drive mechanism, with the upper pressure head assemblies correspondingly disposed above the cup positioning groove. The multiple lower pressure head assemblies are arranged sequentially around the rotary drive mechanism, with the lower pressure head assemblies correspondingly disposed below the cup positioning groove.

[0009] The upper cam is provided with an upper guide rail extending around the rotary drive mechanism, and the upper pressure head assembly slides in cooperation with the upper guide rail;

[0010] The lower cam is provided with a lower guide rail extending around the rotary drive mechanism, and the lower pressure head assembly slides in cooperation with the lower guide rail;

[0011] When the rotary drive mechanism drives the lower pressure head assembly and the upper pressure head assembly to rotate, the upper pressure head assembly will move along the upper guide rail and rise and fall relative to the cup positioning groove, and the lower pressure head assembly will move along the lower guide rail and rise and fall relative to the cup positioning groove.

[0012] The upper pressure head assembly includes an upper test head, an upper insulating pad, an upper connecting structure, and an upper follower connected in sequence. The upper test head is used to electrically connect to the first current collector of the battery on the battery holder. The upper connecting structure is vertically and vertically mounted on the rotary drive mechanism. The upper follower slides in cooperation with the upper guide rail.

[0013] The lower pressure head assembly includes a lower test head, a lower insulating pad, a lower connecting structure, and a lower follower connected in sequence. The lower test head is used to electrically connect to the second current collector of the battery on the battery holder. The lower connecting structure is vertically and vertically mounted on the rotary drive mechanism. The lower follower slides in cooperation with the lower guide rail.

[0014] Both the upper test head and the lower test head are provided with a power connection structure for electrical connection with the current collector of the battery.

[0015] In some optional embodiments, the upper connecting structure includes an upper lifting seat, a buffer elastic element, and a connecting seat. The upper lifting seat is movably mounted on the rotary drive mechanism, the connecting seat is movably mounted on the upper lifting seat, the buffer elastic element is disposed between the upper lifting seat and the connecting seat, the lower insulating pad is disposed at the bottom of the connecting seat, the upper test head is disposed at the bottom of the lower insulating pad, and the upper follower is disposed on the upper lifting seat.

[0016] In some optional embodiments, the connecting seat is provided with a plurality of upper guide posts, the upper guide posts being slidably engaged with the upper lifting seat, and the buffer elastic element being a buffer spring, the buffer spring being sleeved on the upper guide posts, with its two ends respectively connected to the upper lifting seat and the connecting seat.

[0017] In some optional embodiments, the rotary drive mechanism is provided with an upper mounting base and a lower mounting base, the upper mounting base and the lower mounting base being arranged around the rotation axis of the rotary drive mechanism, a plurality of upper pressure head assemblies being arranged sequentially around the upper mounting base, and a plurality of lower pressure head assemblies being arranged sequentially around the lower mounting base.

[0018] In some alternative embodiments, the rotary drive mechanism is provided with an electric slip ring, which is electrically connected to the upper test head and the lower test head respectively.

[0019] In some alternative embodiments, the battery short-circuit testing device further includes: a support frame, on which a mounting support plate is provided and a plurality of connecting columns located at the bottom of the mounting support plate, the upper cam is mounted on the plurality of connecting columns, and the top of the rotary drive mechanism is rotatably engaged with the mounting support plate.

[0020] In some alternative implementations,

[0021] The rotary drive mechanism includes a main rotating shaft and a cup positioning mechanism;

[0022] A portion of the main rotating shaft is rotatably inserted into the upper cam and the lower cam, and the main rotating shaft is provided with a transmission structure for transmission connection with the power component;

[0023] The cup-holding positioning mechanism includes a cup-holding support plate and a cup-holding positioning seat. The cup-holding support plate and the cup-holding positioning seat are arranged sequentially from bottom to top on the main rotating shaft. The cup-holding support plate is provided with a plurality of clearance holes for the lower pressure head assembly to pass through. The plurality of clearance holes are arranged sequentially around the axis of the main rotating shaft. The side of the cup-holding positioning seat is provided with a plurality of cup-holding positioning grooves and a plurality of magnetic attraction structures. The plurality of cup-holding positioning grooves are arranged sequentially around the axis of the main rotating shaft. The position of the cup-holding positioning groove corresponds to the position of the clearance hole. The magnetic attraction structure is correspondingly provided on one side of the cup-holding positioning groove.

[0024] In some optional embodiments, the magnetic attraction structure includes a plurality of magnetic attracting elements, which are arranged sequentially along the direction surrounding the cup positioning groove.

[0025] In some optional embodiments, the rotary drive mechanism further includes a first radial bearing and a second radial bearing, the upper cam and the lower cam are arranged around the main rotating shaft, the main rotating shaft is rotatable relative to the upper cam and the lower cam, the inner ring of the first radial bearing and the inner ring of the second radial bearing are sequentially sleeved on the outside of the main rotating shaft from top to bottom, and the outer ring of the first radial bearing and the outer ring of the second radial bearing are both connected to the lower cam.

[0026] In some optional embodiments, the rotary drive mechanism further includes an axial bearing, the upper ring of which is sleeved on the outside of the main rotating shaft, and the lower ring of which is connected to the lower cam.

[0027] The inner ring of the first radial bearing abuts against the upper ring of the axial bearing.

[0028] Compared to existing technologies, the battery short-circuit testing device of this invention improves safety by using an insulating pad design. When current is transmitted to other parts of the upper and lower test heads besides the electrical connection structure, the insulating pad prevents the current from being transmitted to other structures. Furthermore, the magnetic structure attracts the battery holder to the positioning groove, preventing the battery holder from wobbling. When the battery holder enters the positioning groove, the magnetic structure helps it adhere to the inner wall of the groove, preventing it from tipping over easily when detaching. This ensures smooth battery holder transfer and prevents it from easily tipping over.

[0029] To provide a clearer understanding of this invention, the specific embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0030] Figure 1This is a schematic diagram of one side of a battery short-circuit testing device according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 The enlarged view at point A is shown below;

[0032] Figure 3 This is a schematic diagram of the structure of a pressure head assembly according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the support frame and upper cam according to one embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of a rotary drive mechanism according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of one side of the rotary drive mechanism according to an embodiment of the present invention;

[0036] Figure 7 This is a cross-sectional view of a cup holder positioning base according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the bottom structure of the cup holder positioning base according to an embodiment of the present invention;

[0038] Figure 9 This is a cross-sectional view of one side of the rotary drive mechanism according to an embodiment of the present invention;

[0039] Figure 10 for Figure 9 The enlarged view of point B shown.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Rotary drive mechanism; 110. Main shaft; 111. Transmission structure; 112. First limiting structure; 113. Second limiting structure; 120. Cup positioning mechanism; 121. Cup support plate; 1211. Clearance hole; 122. Cup positioning seat; 1221. Cup positioning groove; 1222. Magnetic suction structure; 1223. Magnetic suction component; 1224. Magnetic suction mounting groove; 130. First radial bearing; 131. Second radial bearing; 132. Axial bearing; 133. Bearing spacer; 14. Upper mounting seat; 15. Lower mounting seat 16. Slip ring; 20. Upper pressure head assembly; 21. Upper test head; 22. Upper insulating pad; 23. Upper connecting structure; 231. Upper lifting seat; 232. Buffer elastic element; 233. Connecting seat; 234. Guide post; 24. Upper follower; 30. Lower pressure head assembly; 31. Lower test head; 311. Power connection structure; 32. Lower insulating pad; 33. Lower connecting structure; 34. Lower follower; 40. Upper cam; 41. Upper guide rail; 50. Lower cam; 51. Lower guide rail; 60. Support frame; 61. Mounting support plate; 62. Connecting post. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. In addition, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In the description of this utility model, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Please see Figures 1 to 3 One embodiment of the present invention provides a battery short circuit testing device, including: a rotary drive mechanism 10, multiple upper pressure head assemblies 20, multiple lower pressure head assemblies 30, an upper cam 40 and a lower cam 50;

[0047] A portion of the rotary drive mechanism 10 is rotatably inserted into the upper cam 40 and the lower cam 50. The rotary drive mechanism 10 is provided with a plurality of cup-holding positioning grooves 1221, which are arranged sequentially around the rotary drive mechanism 10.

[0048] Multiple upper pressure head assemblies 20 and multiple lower pressure head assemblies 30 are disposed on the rotary drive mechanism 10. The multiple upper pressure head assemblies 20 are arranged in sequence around the rotary drive mechanism 10, and the upper pressure head assemblies 20 are correspondingly arranged above the cup positioning groove 1221. The multiple lower pressure head assemblies 30 are arranged in sequence around the rotary drive mechanism 10, and the lower pressure head assemblies 30 are correspondingly arranged below the cup positioning groove 1221.

[0049] The upper cam 40 is provided with an upper guide rail 41 extending around the rotary drive mechanism 10, and the upper pressure head assembly 20 slides in cooperation with the upper guide rail 41.

[0050] The lower cam 50 is provided with a lower guide rail 51 extending around the rotary drive mechanism 10, and the lower pressure head assembly 30 slides in cooperation with the lower guide rail 51.

[0051] When the rotary drive mechanism 10 drives the lower pressure head assembly 30 and the upper pressure head assembly 20 to rotate, the upper pressure head assembly 20 will move along the upper guide rail 41 and rise and fall relative to the cup positioning groove 1221, and the lower pressure head assembly 30 will move along the lower guide rail 51 and rise and fall relative to the cup positioning groove 1221.

[0052] The upper pressure head assembly 20 includes an upper test head 21, an upper insulating pad 22, an upper connecting structure 23, and an upper follower 24 connected in sequence. The upper test head 21 is used to electrically connect to the first current collector of the battery on the battery cup. The upper connecting structure 23 is vertically and vertically mounted on the rotary drive mechanism 10. The upper follower 24 is slidably engaged with the upper guide rail 41.

[0053] The lower pressure head assembly 30 includes a lower test head 31, a lower insulating pad 32, a lower connecting structure 33 and a lower follower 34 connected in sequence. The lower test head 31 is used to electrically connect to the second current collector of the battery on the battery cup. The lower connecting structure 33 is vertically and vertically mounted on the rotary drive mechanism 10. The lower follower 34 slides in cooperation with the lower guide rail 51.

[0054] Both the upper test head 21 and the lower test head 31 are provided with a power connection structure 311 for electrical connection with the current collector of the battery.

[0055] The working principle of a battery short-circuit testing device according to an embodiment of the present invention is explained below:

[0056] The rotary drive mechanism 10 can rotate relative to the upper cam 40 and the lower cam 50. When the rotary drive mechanism 10 rotates under the drive of the power component, it will drive the upper pressure head assembly 20 and the lower pressure head assembly 30 to move along the upper guide rail 41 and the lower guide rail 51. Through the path design of the upper guide rail 41 and the lower guide rail 51, the upper pressure head assembly 20 can be raised and lowered when moving along the upper guide rail 41, and the lower pressure head assembly 30 can be raised and lowered when moving along the lower guide rail 51. After the lower pressure head assembly 30 rises and the upper pressure head assembly 20 falls, the power connection structure 311 of the upper test head 21 will contact the positive current collector of the battery on the battery cup, and the power connection structure 311 of the lower test head 31 will contact the negative current collector of the battery on the battery cup. The power connection structures 311 of the upper test head 21 and the lower test head 31 are both connected to the current tester, and the short circuit test is performed through the current tester.

[0057] The structure and testing principle of the current tester are well-known to those skilled in the art and will not be described in detail here. The current tester can be electrically connected to the power connection structure 311 via wires. The wires can be passed through the upper connecting structure 23, the upper insulating pad 22, and the upper test head 21, and then connected to the power connection structure 311 of the upper test head 21. The wires can also be passed through the lower connecting structure 33, the lower insulating pad 32, and the lower test head 31, and then connected to the power connection structure 311 of the lower test head 31.

[0058] During short-circuit testing, the current tester applies a strong current to the current collector of the battery through the power connection structure 311. If the strong current passes through the power connection structure 311 or the current collector and then to the upper test head 21 and the lower test head 31, the strong current will be transmitted to the lower connection structure 33 and the upper connection structure 23, and then to the rotary drive mechanism 10, the upper cam 40, the lower cam 50 and other structures, and finally to other electrical structures or the human body. The strong current may not only affect the operation of the electrical device, but may also cause harm to the staff, posing a great safety hazard. The upper insulating pad 22.

[0059] The specific structure of the upper connecting structure 23 can be designed according to actual needs. For example, in some optional embodiments, the upper connecting structure 23 includes an upper lifting seat 231, a buffer elastic element 232, and a connecting seat 233. The upper lifting seat 231 is movably mounted on the rotary drive mechanism 10, and the connecting seat 233 is movably mounted on the upper lifting seat 231. The buffer elastic element 232 is disposed between the upper lifting seat 231 and the connecting seat 233. The lower insulating pad 32 is disposed at the bottom of the connecting seat 233, the upper test head 21 is disposed at the bottom of the lower insulating pad 32, and the upper follower 24 is disposed on the upper lifting seat 231. The upper insulating pad 22 isolates the connecting seat 233 and the upper test head 21, preventing the current from the upper test head 21 from being transmitted to the connecting seat 233, thus improving safety. When the upper follower 24 is guided to rise and fall by the upper guide rail 41, it will drive the upper lifting seat 231 to rise and fall. As the upper lifting seat 231 descends, causing the upper test head 21 to descend as well, the power connection structure 311 of the upper test head 21 presses against the current collector of the battery. At this time, the upper test head 21 is resisted by the current collector and stops moving. At this time, the upper test head 21, the connecting seat 233, and the upper insulating pad 22 remain stationary. If the upper lifting seat 231 continues to descend, it will compress the buffer elastic element 232, causing the buffer elastic element 232 to undergo elastic deformation. Since the current collector is relatively thin and the material is relatively soft, it is easy to leave dents and affect the appearance of the product. The elasticity of the buffer elastic element 232 will provide a buffering effect, preventing the upper lifting seat 231 from driving the upper test head 21 to forcefully compress and cause dents or damage to the current collector of the battery, thereby avoiding affecting the appearance of the product.

[0060] The specific structure of the buffer elastic element 232 can be designed according to actual needs. For example, the buffer elastic element 232 can be a spring or other structure. In this embodiment, the buffer elastic element 232 is a buffer spring. In order to facilitate the installation of the buffer spring, a number of upper guide posts 234 are provided on the connecting seat 233. The upper guide posts 234 slide with the upper lifting seat 231. The upper guide posts 234 can improve the positional stability between the upper lifting seat 231 and the connecting seat 233, and prevent the position of the upper lifting seat 231 from shifting relative to the connecting seat 233 when the upper lifting seat 231 is raised or lowered. The buffer spring is sleeved on the upper guide post 234, and its two ends are connected to the upper lifting seat 231 and the connecting seat 233 respectively. The upper guide post 234 facilitates the installation of the buffer spring and also makes the elastic deformation of the buffer spring more stable.

[0061] Please see Figure 4 In some optional embodiments, the battery short-circuit test device also includes a support frame 60, on which a mounting support plate 61 and a plurality of connecting posts 62 located at the bottom of the mounting support plate 61 are provided. The upper cam 40 is mounted on the plurality of connecting posts 62. The top of the rotary drive mechanism 10 is rotatably engaged with the mounting support plate 61. Since the rotary drive mechanism 10 is relatively high, in order to improve the stability of the rotary drive mechanism 10, the rotary drive mechanism 10 is supported by the support frame 60. Moreover, the upper cam 40 can also be mounted on the support frame 60, which facilitates the installation of the upper cam 40.

[0062] Please see Figure 5 and Figure 6 In some alternative embodiments, the rotary drive mechanism 10 includes a main rotating shaft 110 and a cup positioning mechanism 120;

[0063] A portion of the main shaft 110 is rotatably inserted into the upper cam 40 and the lower cam 50, and the main shaft 110 is provided with a transmission structure 111 for transmission connection with the power assembly.

[0064] The cup-holding positioning mechanism 120 includes a cup-holding support plate 121 and a cup-holding positioning seat 122. The cup-holding support plate 121 and the cup-holding positioning seat 122 are arranged sequentially from bottom to top on the main rotating shaft 110. The cup-holding support plate 121 is provided with a plurality of clearance holes 1211 for the lower pressure head assembly 30 to pass through. The plurality of clearance holes 1211 are arranged sequentially around the axis of the main rotating shaft 110. The side of the cup-holding positioning seat 122 is provided with a plurality of cup-holding positioning grooves 1221 and a plurality of magnetic attraction structures 1222. The plurality of cup-holding positioning grooves 1221 are arranged sequentially around the axis of the main rotating shaft 110. The position of the cup-holding positioning grooves 1221 corresponds to the position of the clearance holes 1211. The magnetic attraction structures 1222 are correspondingly arranged on one side of the cup-holding positioning grooves 1221.

[0065] When the battery cup reaches the cup positioning groove 1221, the magnetic structure 1222 magnetically engages with the battery cup, causing the battery cup to fit tightly against the inner wall of the cup positioning groove 1221. This stabilizes the battery cup through the cup positioning groove 1221, preventing the battery cup from becoming unstable and prone to tipping over because it cannot fit tightly against the cup positioning groove 1221.

[0066] When the main shaft 110 rotates to drive the cup positioning mechanism 120 to rotate, the battery cup is stably attracted and positioned, and is not easy to shift its position, thus avoiding affecting the short circuit test.

[0067] When the battery holder needs to leave the holder positioning groove 1221, at the instant the structure that drives the battery holder to leave the holder positioning groove 1221 comes into contact with the battery holder, the battery holder will not tip over due to sudden force. Instead, the magnetic attraction structure 1222 will help maintain the position of the battery holder. Thus, the structure that drives the battery holder to leave the holder positioning groove 1221 only needs to apply a force greater than the magnetic force of the magnetic attraction structure 1222 to gradually drive the battery holder to leave the holder positioning groove 1221, thereby achieving the anti-tipping function.

[0068] It should be noted that the battery holder can typically be made of magnetic material, such as iron. In this case, the magnetic structure 1222 uses a magnet to achieve a magnetic attraction between the magnetic structure 1222 and the battery holder. Alternatively, a corresponding magnetic component can be provided on the battery holder. The magnetic component can be a magnet, while the magnetic structure 1222 can be a magnet or an iron component. The magnetic component can be an iron component, while the magnetic structure 1222 can be a magnet, thereby achieving a magnetic attraction between the magnetic structure 1222 and the battery holder.

[0069] It should be noted that the transmission structure 111 can be designed according to the specific structure of the power component. For example, when the power component is a motor, the transmission structure 111 can adopt a transmission gear, and a drive gear is set on the output shaft of the motor, and the drive gear meshes with the transmission gear.

[0070] Please see Figure 7 and Figure 8 In some optional embodiments, the magnetic structure 1222 includes a plurality of magnetic elements 1223, which are arranged sequentially along the direction surrounding the cup positioning groove 1221. The battery cup is attracted by the plurality of magnetic elements 1223, thereby improving the uniformity of the magnetic force on the battery cup and making the battery cup more stably attracted and positioned.

[0071] To facilitate the installation of the magnetic component 1223, in some optional embodiments, the cup holder positioning base 122 is provided with multiple magnetic mounting slots 1224. Each cup holder positioning slot 1221 has multiple magnetic mounting slots 1224 on its side, and the magnetic component 1223 is correspondingly positioned within each magnetic mounting slot 1224, thus facilitating the installation of the magnetic component 1223. Of course, the magnetic component 1223 can also be installed onto the cup holder positioning base 122 using other installation methods, such as screws, snap-fit ​​structures, or adhesive structures.

[0072] Please see Figure 9 and Figure 10 In some optional embodiments, the rotary drive mechanism 10 further includes a first radial bearing 130 and a second radial bearing 131. The upper cam 40 and the lower cam 50 are arranged around the main rotating shaft 110. The main rotating shaft 110 can rotate relative to the upper cam 40 and the lower cam 50. The inner ring of the first radial bearing 130 and the inner ring of the second radial bearing 131 are sequentially sleeved on the outer side of the main rotating shaft 110 from top to bottom. The outer rings of the first radial bearing 130 and the second radial bearing 131 are both connected to the lower cam 50. The radial load from the main rotating shaft 110 is borne by the first radial bearing 130 and the second radial bearing 131, which restricts the radial position of the main rotating shaft 110, thereby improving the positional stability of the main rotating shaft 110 relative to the lower cam 50, so that the main rotating shaft 110 can rotate stably relative to the lower cam 50. After the lower test head 31 rises, a portion of the lower test head 31 can pass through the clearance hole 1211, and then the power connection structure 311 of the lower test head 31 abuts against the current collector of the battery on the battery holder.

[0073] In some optional embodiments, the rotary drive mechanism 10 further includes an axial bearing 132, the upper ring of which is sleeved on the outside of the main shaft 110, and the lower ring of which is connected to the lower cam 50. The inner ring of the first radial bearing 130 abuts against the upper ring of the axial bearing 132. The axial bearing 132 can bear the axial load from the main shaft 110 through the inner ring of the first radial bearing 130. The axial load applied by the main shaft 110 mainly comes from the gravity of the main shaft 110, which restricts the axial displacement of the main shaft 110, thereby improving the positional stability of the main shaft 110 in the axial direction and achieving the effect of improving the rotational stability of the main shaft 110.

[0074] In some optional embodiments, a bearing spacer 133 is provided between the inner ring of the first radial bearing 130 and the upper ring of the axial bearing 132. The bearing spacer 133 is sleeved on the outside of the main shaft 110. The top of the bearing spacer 133 abuts against the bottom of the inner ring of the first radial bearing 130, and the bottom of the bearing spacer 133 abuts against the upper ring of the axial bearing 132. The force between the inner ring of the first radial bearing 130 and the upper ring of the axial bearing 132 is transmitted through the bearing spacer 133, which helps to improve the force stability between the inner ring of the first radial bearing 130 and the upper ring of the axial bearing 132.

[0075] In some optional embodiments, the main shaft 110 is provided with a first limiting structure 112 and a second limiting structure 113. The first limiting structure 112 and the second limiting structure 113 are arranged sequentially from top to bottom on the main shaft 110. The first limiting structure 112 abuts against the top of the inner ring of the first radial bearing 130, thereby preventing the inner ring of the first radial bearing 130 from moving upward, and thus restricting the main shaft 110 from moving upward. The main shaft 110 is arranged vertically, and its axial direction is approximately parallel to the vertical direction. Therefore, the axial bearing 132 and the first limiting structure 112 can restrict the main shaft 110. The second limiting structure 113 abuts against the bottom of the inner ring of the second radial bearing 131, thereby restricting the position of the inner ring of the second radial bearing 131, and thus restricting the main shaft 110 from moving downward.

[0076] In some alternative embodiments, the lower cam 50 is provided with an oil injection chamber, and the first radial bearing 130 and the axial bearing 132 are disposed in the oil injection chamber. Lubricating oil can be injected into the oil injection chamber, and the lubricating oil can provide a slipping effect for the first radial bearing 130 and the axial bearing 132.

[0077] The specific structure of the first radial bearing 130 and the second radial bearing 131 can be designed according to actual needs. For example, the first radial bearing 130 and the second radial bearing 131 can be deep groove ball bearings, ball bearings, roller bearings, etc. In this embodiment, the first radial bearing 130 and the second radial bearing 131 are deep groove ball bearings.

[0078] The specific structure of the axial bearing 132 can be designed according to actual needs. For example, the axial bearing 132 can be a thrust ball bearing or a thrust roller bearing.

[0079] In some alternative embodiments, the first limiting structure 112 is a protrusion formed on the side of the main rotating shaft 110, and the second limiting structure 113 is a locking nut detachably mounted on the main rotating shaft 110, which facilitates the installation between the main rotating shaft 110 and the lower cam 50. The locking nut is threaded into the main rotating shaft 110 to achieve a detachable connection.

[0080] In this embodiment, a camshaft sleeve is fixedly installed on the lower cam 50. The camshaft sleeve is sleeved on the main rotating shaft 110. The outer ring of the first radial bearing 130, the outer ring of the second radial bearing 131, and the lower ring of the axial bearing 132 are all connected to the camshaft sleeve. The oil injection chamber is set on the camshaft sleeve. This helps to simplify the structure of each part and facilitates the production and assembly of the lower cam 50.

[0081] To facilitate the installation of the upper pressure head assembly 20 and the lower pressure head assembly 30, in some optional embodiments, the rotary drive mechanism 10 is provided with an upper mounting base 14 and a lower mounting base 15. The upper mounting base 14 and the lower mounting base 15 are arranged around the rotation axis of the rotary drive mechanism 10. Multiple upper pressure head assemblies 20 are arranged sequentially around the upper mounting base 14, and multiple lower pressure head assemblies 30 are arranged sequentially around the lower mounting base 15. In this embodiment, the upper lifting seat 231 is movably mounted on the upper mounting base 14, while the lower connecting structure 33 is movably mounted on the lower mounting base 15. Both the upper mounting base 14 and the lower mounting base 15 are located on the main rotating shaft 110.

[0082] In some optional embodiments, an electric slip ring 16 is provided on the rotary drive mechanism 10. The electric slip ring 16 is electrically connected to the upper test head 21 and the lower test head 31 respectively. The electric slip ring 16 is connected to the power connection structure 311 of the upper test head 21 and the power connection structure 311 of the lower test head 31 respectively through multiple wires. Since the electric slip ring 16 can rotate with the rotary drive mechanism 10, the wires will not be disturbed, and the power connection is convenient. The current testing instrument is electrically connected to the electric slip ring 16.

[0083] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery short-circuit testing device, characterized in that, include: A rotary drive mechanism, multiple upper pressure head assemblies, multiple lower pressure head assemblies, an upper cam, and a lower cam; A portion of the rotary drive mechanism is rotatably inserted into the upper cam and the lower cam. The rotary drive mechanism is provided with a plurality of cup-holding positioning grooves, which are arranged sequentially around the rotary drive mechanism. Multiple upper pressure head assemblies and multiple lower pressure head assemblies are disposed on the rotary drive mechanism. The multiple upper pressure head assemblies are arranged sequentially around the rotary drive mechanism, with the upper pressure head assemblies correspondingly disposed above the cup positioning groove. The multiple lower pressure head assemblies are arranged sequentially around the rotary drive mechanism, with the lower pressure head assemblies correspondingly disposed below the cup positioning groove. The upper cam is provided with an upper guide rail extending around the rotary drive mechanism, and the upper pressure head assembly slides in cooperation with the upper guide rail; The lower cam is provided with a lower guide rail extending around the rotary drive mechanism, and the lower pressure head assembly slides in cooperation with the lower guide rail; When the rotary drive mechanism drives the lower pressure head assembly and the upper pressure head assembly to rotate, the upper pressure head assembly will move along the upper guide rail and rise and fall relative to the cup positioning groove, and the lower pressure head assembly will move along the lower guide rail and rise and fall relative to the cup positioning groove. The upper pressure head assembly includes an upper test head, an upper insulating pad, an upper connecting structure, and an upper follower connected in sequence. The upper test head is used to electrically connect to the first current collector of the battery on the battery holder. The upper connecting structure is vertically and vertically mounted on the rotary drive mechanism. The upper follower slides in cooperation with the upper guide rail. The lower pressure head assembly includes a lower test head, a lower insulating pad, a lower connecting structure, and a lower follower connected in sequence. The lower test head is used to electrically connect to the second current collector of the battery on the battery holder. The lower connecting structure is vertically and vertically mounted on the rotary drive mechanism. The lower follower slides in cooperation with the lower guide rail. Both the upper test head and the lower test head are provided with a power connection structure for electrical connection with the current collector of the battery.

2. The battery short-circuit testing device according to claim 1, characterized in that: The upper connecting structure includes an upper lifting seat, a buffer elastic element, and a connecting seat. The upper lifting seat is movably mounted on the rotary drive mechanism, the connecting seat is movably mounted on the upper lifting seat, the buffer elastic element is located between the upper lifting seat and the connecting seat, the lower insulating pad is located at the bottom of the connecting seat, the upper test head is located at the bottom of the lower insulating pad, and the upper follower is located on the upper lifting seat.

3. The battery short-circuit testing device according to claim 2, characterized in that: The connecting seat is provided with several upper guide posts, which are slidably engaged with the upper lifting seat. The buffer elastic element is a buffer spring, which is sleeved on the upper guide posts and its two ends are respectively connected to the upper lifting seat and the connecting seat.

4. The battery short-circuit testing device according to claim 1, characterized in that: The rotary drive mechanism is provided with an upper mounting base and a lower mounting base, which are arranged around the rotation axis of the rotary drive mechanism. A plurality of upper pressure head assemblies are arranged sequentially around the upper mounting base, and a plurality of lower pressure head assemblies are arranged sequentially around the lower mounting base.

5. The battery short-circuit testing device according to claim 1, characterized in that: The rotary drive mechanism is equipped with an electric slip ring, which is electrically connected to the upper test head and the lower test head respectively.

6. The battery short-circuit testing device according to claim 1, characterized in that, Also includes: A support frame is provided with a mounting support plate and a plurality of connecting columns located at the bottom of the mounting support plate. The upper cam is mounted on the plurality of connecting columns, and the top of the rotary drive mechanism is rotatably engaged with the mounting support plate.

7. A battery short-circuit testing device according to any one of claims 1 to 6, characterized in that: The rotary drive mechanism includes a main rotating shaft and a cup positioning mechanism; A portion of the main rotating shaft is rotatably inserted into the upper cam and the lower cam, and the main rotating shaft is provided with a transmission structure for transmission connection with the power component; The cup-holding positioning mechanism includes a cup-holding support plate and a cup-holding positioning seat. The cup-holding support plate and the cup-holding positioning seat are arranged sequentially from bottom to top on the main rotating shaft. The cup-holding support plate is provided with a plurality of clearance holes for the lower pressure head assembly to pass through. The plurality of clearance holes are arranged sequentially around the axis of the main rotating shaft. The side of the cup-holding positioning seat is provided with a plurality of cup-holding positioning grooves and a plurality of magnetic attraction structures. The plurality of cup-holding positioning grooves are arranged sequentially around the axis of the main rotating shaft. The position of the cup-holding positioning groove corresponds to the position of the clearance hole. The magnetic attraction structure is correspondingly provided on one side of the cup-holding positioning groove.

8. A battery short-circuit testing device according to claim 7, characterized in that: The magnetic attraction structure includes multiple magnetic components, which are arranged sequentially along the direction surrounding the cup positioning groove.

9. A battery short-circuit testing device according to claim 7, characterized in that: The rotary drive mechanism further includes a first radial bearing and a second radial bearing. The upper cam and the lower cam are arranged around the main rotating shaft. The main rotating shaft can rotate relative to the upper cam and the lower cam. The inner ring of the first radial bearing and the inner ring of the second radial bearing are sequentially sleeved on the outside of the main rotating shaft from top to bottom. The outer ring of the first radial bearing and the outer ring of the second radial bearing are both connected to the lower cam.

10. A battery short-circuit testing device according to claim 9, characterized in that: The rotary drive mechanism also includes an axial bearing, the upper ring of which is sleeved on the outside of the main shaft, and the lower ring of which is connected to the lower cam. The inner ring of the first radial bearing abuts against the upper ring of the axial bearing.

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