Battery short circuit testing device and rotary driving mechanism thereof
By using technologies such as magnetic suction structure and radial bearing in the battery short-circuit test device, the problem of wobbling and tipping of the battery cup during rotation is solved, achieving stable positioning of the battery cup and efficient and safe testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU YIZHONG INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-21
AI Technical Summary
In existing battery short-circuit testing devices, the battery cup is prone to shaking and tipping during rotation, resulting in unstable short-circuit testing. Furthermore, traditional linear mechanical contact methods are inefficient and pose high safety risks.
A magnetic structure is used to attach the battery holder to the holder positioning groove. The magnetic attraction ensures stable positioning of the holder and prevents it from tipping over when it detaches. Combined with radial and axial bearings, the stability of the main shaft is improved, ensuring smooth rotation.
It achieves stable positioning of the battery holder during rotation, avoiding shaking and tipping, improving the stability and safety of short-circuit testing, simplifying the structure and improving operational efficiency.
Smart Images
Figure CN224536157U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery processing technology, specifically to a battery short-circuit testing device and its rotary drive mechanism. 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 typical rotary cam structure for battery short-circuit testing devices includes an upper cam, a lower cam, and a rotating structure. The rotating component drives multiple battery holders to rotate, simultaneously causing the upper pressure head to rise and fall along the upper guide rail of the upper cam and the lower pressure head 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 holder, while the lower pressure head rises to contact the negative current collector, thus enabling short-circuit testing. However, current rotating structures cannot effectively position the battery holders. When the rotating structure moves the battery holders, they wobble, and because there is no additional force to position them when they come into contact with the rotating structure, they are prone to tipping over as they cannot stay firmly against the structure. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings and deficiencies in the prior art and to provide a battery short-circuit testing device and its rotary drive mechanism.
[0005] One embodiment of this utility model provides a rotary drive mechanism for a battery short-circuit testing device, comprising:
[0006] A vertically arranged main shaft is provided with a transmission structure for transmission connection with the power component.
[0007] A 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 multiple clearance holes for the lower pressure head assembly to pass through. The multiple clearance holes are arranged sequentially around the axis of the main rotating shaft. The side of the cup-holding positioning seat is provided with multiple cup-holding positioning grooves and multiple magnetic structures. The multiple cup-holding positioning grooves are arranged sequentially around the axis of the main rotating shaft. The positions of the cup-holding positioning grooves correspond to the positions of the clearance holes. The magnetic structures are correspondingly arranged on one side of the cup-holding positioning grooves.
[0008] In some alternative embodiments, the magnetic attraction structure includes a plurality of magnetic attractors arranged sequentially along the direction surrounding the cup positioning groove.
[0009] In some optional embodiments, the cup holder is provided with a plurality of magnetic mounting slots, and each cup holder is provided with a plurality of magnetic mounting slots on its side, and the magnetic component is correspondingly disposed in the magnetic mounting slot.
[0010] In some optional embodiments, the rotary drive mechanism of the battery short-circuit test device further includes a lower cam, a first radial force bearing, and a second radial force bearing. The lower cam is arranged around the main rotating shaft, which is rotatable relative to the lower cam. The lower cam is provided with a lower guide rail for guiding the lower pressure head assembly to rise and fall. The inner rings of the first and second radial force bearings are sequentially sleeved on the outer side of the main rotating shaft from top to bottom. The outer rings of the first and second radial force bearings are both connected to the lower cam.
[0011] In some optional embodiments, the rotary drive mechanism of the battery short-circuit test device 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.
[0012] The inner ring of the first radial bearing abuts against the upper ring of the axial bearing.
[0013] In some optional embodiments, a bearing spacer is provided between the inner ring of the first radial bearing and the upper ring of the axial bearing. The bearing spacer is sleeved on the outside of the main shaft, the top of the bearing spacer abuts against the bottom of the inner ring of the first radial bearing, and the bottom of the bearing spacer abuts against the upper ring of the axial bearing.
[0014] In some optional embodiments, the main rotating shaft is provided with a first limiting structure and a second limiting structure, which are arranged sequentially from top to bottom on the main rotating shaft. The first limiting structure abuts against the top of the inner ring of the first radial bearing, and the second limiting structure abuts against the bottom of the inner ring of the second radial bearing.
[0015] In some alternative embodiments, the lower cam is provided with an oil injection chamber, and the first radial bearing and the axial bearing are disposed in the oil injection chamber.
[0016] In some alternative embodiments, the first limiting structure is a protrusion formed on the side of the main shaft, and the second limiting structure is a locking nut detachably mounted on the main shaft.
[0017] Another embodiment of this utility model provides a battery short-circuit testing device, including: a rotary drive mechanism as described above for a battery short-circuit testing device.
[0018] Compared to existing technologies, the rotary drive mechanism of the battery short-circuit testing device of this invention uses a magnetic attraction structure to attract the battery cup to the cup positioning groove, thereby preventing the battery cup from shaking. Moreover, when the battery cup enters the cup positioning groove, the magnetic attraction structure helps the battery cup to adhere to the inner wall of the cup positioning groove. When the battery cup leaves the cup positioning groove, it will not tip over easily, making the transfer of the battery cup smooth and preventing it from tipping over. The overall structure of the rotary drive mechanism is simple, and the rotation of the main shaft is relatively stable.
[0019] 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
[0020] Figure 1 This is a schematic diagram of the rotating drive mechanism of a battery short-circuit testing device according to an embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of one side of the rotary drive mechanism of a battery short-circuit testing device according to an embodiment of the present invention.
[0022] Figure 3 This is a cross-sectional view of a cup holder positioning base according to an embodiment of the present invention;
[0023] Figure 4 This is a schematic diagram of the bottom structure of the cup holder positioning base according to an embodiment of the present invention;
[0024] Figure 5 This is a cross-sectional view of one side of the rotary drive mechanism of a battery short-circuit testing device according to an embodiment of the present invention.
[0025] Figure 6 for Figure 5 The enlarged view at point A is shown below;
[0026] Figure 7 This is a schematic diagram of a portion of the structure of a battery short-circuit testing device according to an embodiment of the present invention.
[0027] Explanation of reference numerals in the attached figures:
[0028] 10. Main shaft; 11. Transmission structure; 12. First limiting structure; 13. Second limiting structure; 20. Cup positioning mechanism; 21. Cup support plate; 211. Clearance hole; 22. Cup positioning seat; 221. Cup positioning groove; 222. Magnetic suction structure; 223. Magnetic suction component; 224. Magnetic suction mounting groove; 30. First radial bearing; 31. Second radial bearing; 32. Axial bearing; 33. Bearing spacer; 40. Lower cam; 41. Lower guide rail; 42. Oil injection chamber; 43. Camshaft sleeve; 50. Upper cam; 51. Upper guide rail; 60. Lower pressure head assembly; 70. Upper pressure head assembly; Detailed Implementation
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] Please see Figure 1 and Figure 2 This invention provides a rotary drive mechanism for a battery short-circuit testing device, comprising:
[0034] A vertically arranged main rotating shaft 10 is provided with a transmission structure 11 for transmission connection with the power component.
[0035] The cup positioning mechanism 20 includes a cup support plate 21 and a cup positioning seat 22, which are arranged sequentially from bottom to top on the main rotating shaft 10. The cup support plate 21 is used to support the bottom of the battery cup and has multiple clearance holes 211 for the pressing head assembly 60 to pass through. The multiple clearance holes 211 are arranged sequentially around the axis of the main rotating shaft 10. The side of the cup positioning seat 22 is provided with multiple cup positioning grooves 221 and multiple magnetic suction. Structure 222, cup positioning groove 221 is positioned and engaged with the side of battery cup, the shape of cup positioning groove 221 matches the battery cup. Since the battery cup is usually cylindrical, the shape of cup positioning groove 221 can be arc-shaped to match the shape of the battery cup; multiple cup positioning grooves 221 are arranged in sequence around the axis of the main rotating shaft 10, the position of cup positioning groove 221 corresponds to the position of clearance hole 211, and magnetic suction structure 222 is correspondingly set on one side of cup positioning groove 221.
[0036] The working principle of the rotary drive mechanism of a battery short-circuit testing device according to an embodiment of the present invention is described below:
[0037] When the battery cup reaches the cup positioning groove 221, the magnetic structure 222 magnetically engages with the battery cup, causing the battery cup to fit tightly against the inner wall of the cup positioning groove 221. This stabilizes the battery cup through the cup positioning groove 221, preventing the battery cup from becoming unstable and prone to tipping over because it cannot fit tightly against the cup positioning groove 221.
[0038] When the main shaft 10 rotates to drive the cup positioning mechanism 20 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.
[0039] When the battery holder needs to leave the holder positioning groove 221, at the instant the structure that drives the battery holder to leave the holder positioning groove 221 comes into contact with the battery holder, the battery holder will not tip over due to sudden force. Instead, the magnetic attraction structure 222 will help maintain the position of the battery holder. Thus, the structure that drives the battery holder to leave the holder positioning groove 221 only needs to apply a force greater than the magnetic force of the magnetic attraction structure 222 to gradually drive the battery holder to leave the holder positioning groove 221, thereby achieving the anti-tipping function.
[0040] It should be noted that the battery holder can typically be made of magnetic material, such as iron. In this case, the magnetic structure 222 uses a magnet to achieve magnetic attraction between the magnetic structure 222 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 222 can be a magnet or an iron component. The magnetic component can be an iron component, while the magnetic structure 222 can be a magnet, thus achieving magnetic attraction between the magnetic structure 222 and the battery holder.
[0041] It should be noted that the transmission structure 11 can be designed according to the specific structure of the power component. For example, when the power component is a motor, the transmission structure 11 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.
[0042] Please see Figure 3 and Figure 4 In some optional embodiments, the magnetic attraction structure 222 includes multiple magnetic attraction elements 223, which are arranged sequentially along the direction surrounding the cup positioning groove 221. The multiple magnetic attraction elements 223 adsorb the battery cup, thereby improving the uniformity of the magnetic attraction force on the battery cup and making the battery cup more stably adsorbed and positioned.
[0043] To facilitate the installation of the magnetic component 223, in some optional embodiments, the cup holder 22 is provided with multiple magnetic mounting slots 224. Each cup holder 221 has multiple magnetic mounting slots 224 on its side, and the magnetic component 223 is correspondingly positioned within each magnetic mounting slot 224, thus facilitating its installation. Of course, the magnetic component 223 can also be installed onto the cup holder 22 using other methods, such as screws, snap-fit structures, or adhesive structures.
[0044] Please see Figure 5 and Figure 6 In some optional embodiments, the rotary drive mechanism of the battery short-circuit test device further includes a first radial bearing 30, a second radial bearing 31, and a lower cam 40. The lower cam 40 is arranged around the main rotating shaft 10, and the main rotating shaft 10 can rotate relative to the lower cam 40. The lower cam 40 is provided with a lower guide rail 61 for guiding the lower pressure head assembly 60 to rise and fall. The inner ring of the first radial bearing 30 and the inner ring of the second radial bearing 31 are sequentially sleeved on the outer side of the main rotating shaft 10 from top to bottom. The outer rings of the first radial bearing 30 and the second radial bearing 31 are both connected to the lower cam 40. The radial load from the main rotating shaft 10 is borne by the first radial bearing 30 and the second radial bearing 31, limiting the radial position of the main rotating shaft 10, thereby improving the positional stability of the main rotating shaft 10 relative to the lower cam 40, so that the main rotating shaft 10 can rotate stably relative to the lower cam 40. It should be noted that the lower cam 40 is fixed to other support structures and does not rotate with the main shaft 10; the lower pressure head assembly 60 is mounted on the main shaft 10. As the main shaft 10 moves, the lower pressure head assembly 60 moves along the lower guide rail 61. The lower guide rail 61 can be designed with different heights, so that the lower pressure head assembly 60 can rise and fall along the lower guide rail 61. After the lower pressure head assembly 60 rises, part of the lower pressure head assembly 60 can pass through the clearance hole 211 and then abut against the current collector of the battery on the battery cup.
[0045] In some optional embodiments, the rotary drive mechanism of the battery short-circuit test device further includes an axial bearing 32, the upper ring of which is sleeved on the outside of the main rotating shaft 10, and the lower ring of which is connected to the lower cam 40. The inner ring of the first radial bearing 30 abuts against the upper ring of the axial bearing 32. The axial bearing 32 can bear the axial load from the main rotating shaft 10 through the inner ring of the first radial bearing 30. The axial load applied by the main rotating shaft 10 mainly comes from the gravity of the main rotating shaft 10, which restricts the axial displacement of the main rotating shaft 10, thereby improving the positional stability of the main rotating shaft 10 in the axial direction and achieving the effect of improving the rotational stability of the main rotating shaft 10.
[0046] In some optional embodiments, a bearing spacer 33 is provided between the inner ring of the first radial bearing 30 and the upper ring of the axial bearing 32. The bearing spacer 33 is sleeved on the outside of the main shaft 10. The top of the bearing spacer 33 abuts against the bottom of the inner ring of the first radial bearing 30, and the bottom of the bearing spacer 33 abuts against the upper ring of the axial bearing 32. The force between the inner ring of the first radial bearing 30 and the upper ring of the axial bearing 32 is transmitted through the bearing spacer 33, which helps to improve the force stability between the inner ring of the first radial bearing 30 and the upper ring of the axial bearing 32.
[0047] In some optional embodiments, the main rotating shaft 10 is provided with a first limiting structure 12 and a second limiting structure 13. The first limiting structure 12 and the second limiting structure 13 are arranged sequentially from top to bottom on the main rotating shaft 10. The first limiting structure 12 abuts against the top of the inner ring of the first radial bearing 30, thereby preventing the inner ring of the first radial bearing 30 from moving upward, and thus restricting the main rotating shaft 10 from moving upward. The main rotating shaft 10 is arranged vertically, and its axial direction is approximately parallel to the vertical direction. Therefore, the axial bearing 32 and the first limiting structure 12 can restrict the main rotating shaft 10. The second limiting structure 13 abuts against the bottom of the inner ring of the second radial bearing 31, thereby restricting the position of the inner ring of the second radial bearing 31, and thus restricting the main rotating shaft 10 from moving downward.
[0048] In some optional embodiments, the lower cam 40 is provided with an oil injection chamber 42, and the first radial bearing 30 and the axial bearing 32 are disposed in the oil injection chamber 42. Lubricating oil can be injected into the oil injection chamber 42, and the lubricating oil can provide a slipping effect for the first radial bearing 30 and the axial bearing 32.
[0049] The specific structure of the first radial bearing 30 and the second radial bearing 31 can be designed according to actual needs. For example, the first radial bearing 30 and the second radial bearing 31 can be deep groove ball bearings, ball bearings, roller bearings, etc. In this embodiment, the first radial bearing 30 and the second radial bearing 31 are deep groove ball bearings.
[0050] The specific structure of the axial bearing 32 can be designed according to actual needs. For example, the axial bearing 32 can be a thrust ball bearing or a thrust roller bearing.
[0051] In some alternative embodiments, the first limiting structure 12 is a protrusion formed on the side of the main rotating shaft 10, and the second limiting structure 13 is a locking nut detachably mounted on the main rotating shaft 10, which facilitates the installation between the main rotating shaft 10 and the lower cam 40. The locking nut is threaded into the main rotating shaft 10 to achieve a detachable connection.
[0052] In this embodiment, a camshaft sleeve 43 is fixedly installed on the lower cam 40. The camshaft sleeve 43 is sleeved on the main rotating shaft 10. The outer ring of the first radial bearing 30, the outer ring of the second radial bearing 31, and the lower ring of the axial bearing 32 are all connected to the camshaft sleeve 43. The oil injection chamber 42 is set on the camshaft sleeve 43. This helps to simplify the structure of each part and facilitates the production and assembly of the lower cam 40.
[0053] The rotary drive mechanism of the aforementioned battery short-circuit test device can be applied to a battery short-circuit test device, which includes: a rotary drive mechanism of the aforementioned battery short-circuit test device. In this embodiment, the battery short-circuit testing device further includes an upper cam 50, a lower cam 40, a lower pressure head assembly 60, and an upper pressure head assembly 70. The upper cam 50 is provided with an upper guide rail 51, and the lower pressure head assembly 60 is provided with a lower guide rail 61. Both the upper pressure head assembly 70 and the lower pressure head assembly 60 are mounted on the main rotating shaft 10. When the main rotating shaft 10 drives the lower pressure head assembly 60 and the upper pressure head assembly 70 to rotate, the upper pressure head assembly 70 will move along the upper guide rail 51 and will also rise and fall. The lower pressure head assembly 60 will move along the lower guide rail 61 and will also rise and fall. After the lower pressure head assembly 60 rises and the upper pressure head assembly 70 falls, they will respectively contact the positive current collector and the negative current collector on the battery cup, so that the lower pressure head assembly 60 is electrically connected to the negative current collector and the upper pressure head assembly 70 is electrically connected to the positive current collector of the battery, so as to facilitate short-circuit testing.
[0054] 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 rotary drive mechanism for a battery short-circuit testing device, characterized in that, include: A vertically arranged main shaft is provided with a transmission structure for transmission connection with the power component. A 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 multiple clearance holes for the lower pressure head assembly to pass through. The multiple clearance holes are arranged sequentially around the axis of the main rotating shaft. The side of the cup-holding positioning seat is provided with multiple cup-holding positioning grooves and multiple magnetic structures. The multiple cup-holding positioning grooves are arranged sequentially around the axis of the main rotating shaft. The positions of the cup-holding positioning grooves correspond to the positions of the clearance holes. The magnetic structures are correspondingly arranged on one side of the cup-holding positioning grooves.
2. The rotary drive mechanism of the battery short-circuit testing device according to claim 1, characterized in that: The magnetic attraction structure includes multiple magnetic components, which are arranged sequentially along the direction surrounding the cup positioning groove.
3. The rotary drive mechanism of the battery short-circuit testing device according to claim 2, characterized in that: The cup holder is provided with multiple magnetic mounting slots, and each cup holder is provided with multiple magnetic mounting slots on its side, with the magnetic component correspondingly disposed in the magnetic mounting slot.
4. The rotary drive mechanism of a battery short-circuit testing device according to any one of claims 1 to 3, characterized in that, It also includes a lower cam, a first radial bearing, and a second radial bearing. The lower cam is arranged around the main rotating shaft, and the main rotating shaft can rotate relative to the lower cam. The lower cam is provided with a lower guide rail for guiding the lifting and lowering of the lower pressure head assembly. The inner rings of the first radial bearing and the second radial bearing are sequentially sleeved on the outside of the main rotating shaft from top to bottom. The outer rings of the first radial bearing and the second radial bearing are both connected to the lower cam.
5. The rotary drive mechanism of the battery short-circuit testing device according to claim 4, characterized in that, It 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.
6. The rotary drive mechanism of the battery short-circuit testing device according to claim 5, characterized in that: A bearing spacer is provided between the inner ring of the first radial bearing and the upper ring of the axial bearing. The bearing spacer is sleeved on the outside of the main shaft. The top of the bearing spacer abuts against the bottom of the inner ring of the first radial bearing, and the bottom of the bearing spacer abuts against the upper ring of the axial bearing.
7. The rotary drive mechanism of the battery short-circuit testing device according to claim 6, characterized in that: The main rotating shaft is provided with a first limiting structure and a second limiting structure, which are arranged sequentially from top to bottom on the main rotating shaft. The first limiting structure abuts against the top of the inner ring of the first radial force bearing, and the second limiting structure abuts against the bottom of the inner ring of the second radial force bearing.
8. The rotary drive mechanism of the battery short-circuit testing device according to claim 5, characterized in that: The lower cam is provided with an oil injection chamber, and the first radial bearing and the axial bearing are disposed in the oil injection chamber.
9. The rotary drive mechanism of the battery short-circuit testing device according to claim 7, characterized in that: The first limiting structure is a protrusion formed on the side of the main rotating shaft, and the second limiting structure is a locking nut that can be detachably mounted on the main rotating shaft.
10. A battery short-circuit testing device, characterized in that, include: A rotary drive mechanism for a battery short-circuit testing device as described in any one of claims 1 to 9.