A battery module simulation device

Abstract

The application aims to provide a battery module simulation device to simulate the battery module and its expansion process in the prior art. The battery module simulation device comprises a base and simulation battery cells slidingly assembled on the base in a guide manner, the simulation battery cells are arranged in multiple numbers in front and back in the length direction of the base, and each simulation battery cell is provided with a threaded hole; the battery module simulation device further comprises a rotating shaft rotatably assembled on the base, the rotating shaft comprises multiple threaded adjusting segments arranged in an axial direction, each threaded adjusting segment is used for threaded cooperation with the threaded hole of the simulation battery cell; the outer diameter of the threaded adjusting segment at the front side in the two adjacent threaded adjusting segments is greater than the outer diameter of the threaded adjusting segment at the rear side, and each threaded adjusting segment is in a stepped shape; the absolute value a of the difference value of the thread pitch on any two adjacent threaded adjusting segments is equal and greater than zero, so that the distance between any two adjacent battery cells is kept equal when each simulation battery cell is moved by rotating the rotating shaft.

Description

Technical Field

[0001] This invention relates to the field of fixtures and tooling, and more specifically to a simulation device for simulating the stretching and expansion of a battery module. Background Technology

[0002] During the use of the battery pack, as the charging and discharging process proceeds, the surface of the battery cells may bulge locally or expand as a whole due to thermal runaway. This can cause the battery module to have uneven surfaces, stretching or shrinking. Components such as structural adhesive, heating film, and sampling FPC that are attached to the surface of the battery module will also be pulled by the deformed battery module, thus affecting their connection and use.

[0003] To test and optimize the expansion and tensile strength of components such as structural adhesives, heating films, and sampling FPCs, it is necessary to simulate battery module expansion tests. This allows for performance testing and data collection for each component, enabling optimization of their manufacturing. Existing testing methods involve accelerating charge-discharge cycles on real battery packs to induce cell expansion, thereby enabling performance testing of components within each battery module.

[0004] However, the problem with existing testing methods is that... (1) The test cycle is too long: The expansion displacement between the cells is generated during the charging and discharging process. In order to simulate the different degrees of stretching and contraction of the sample, the sample needs to undergo 3,000 charge-discharge cycles with the battery pack. Each charge-discharge cycle takes 3 hours, and the entire test cycle exceeds 9,000 hours, which is about 375 days. (2) Uncontrollable expansion degree and inconsistent expansion degree between multiple tests: The expansion degree is mainly affected by the actual charging and discharging process of the battery cell. Each battery cell module expands with the standard charging and discharging cycle, but the degree of expansion change and the maximum value of expansion are inconsistent among different battery cell modules and cannot be controlled. (3) High testing cost: Each test requires a new complete battery pack for testing. After one test is completed, the battery pack has reached the specified number of cycles and cannot be tested again or used. Summary of the Invention

[0005] The purpose of this invention is to provide a battery module simulation device to simulate the battery module and its expansion process in the prior art, thereby enabling performance testing of battery module components with short testing cycles, controllable expansion processes, and reduced testing costs.

[0006] To achieve the above objectives, the technical solution of the battery module simulation device provided by the present invention is as follows: A battery module simulation device includes a base and simulated battery cells slidably mounted on the base. Multiple simulated battery cells are arranged longitudinally along the length of the base, and each simulated battery cell has a coaxial threaded hole. The battery module simulation device also includes a rotating shaft rotatably mounted on the base. The rotating shaft includes multiple threaded adjustment sections arranged axially, each threaded adjustment section being threadedly engaged with the threaded hole of the simulated battery cell. The outer diameter of the threaded adjustment section located in front of any two adjacent threaded adjustment sections is larger than the outer diameter of the threaded adjustment section located behind, and each threaded adjustment section is stepped. The absolute value 'a' of the difference in thread pitch between any two adjacent threaded adjustment sections is equal and greater than zero, so that when the rotating shaft is turned, causing the simulated battery cells to move, the distance between any two adjacent battery cells remains equal.

[0007] Beneficial Effects: The battery module simulation device simulates the structure and expansion effect of a battery module. The simulated cells mimic the structure of a battery cell, with threaded holes on them. A threaded adjustment section matching these holes is installed on the rotating shaft, allowing the simulated cells to be connected in series via the shaft, forming a structure similar to a battery module. Each simulated cell is guided and slidably mounted on the base. By rotating the shaft, the simulated cells can slide together along the axis of the shaft, moving away from each other, thus simulating the battery pack expansion process. Reversing the shaft allows the simulated cells to move closer together again, making the simulation process repeatable. By attaching structural adhesive, a heating film, and sampling FPC to each simulated cell, the performance of each component can be tested. Since the absolute value 'a' of the difference in thread pitch between any two adjacent threaded adjustment sections is equal and greater than zero, although the movement distance of each simulated cell is different when the shaft is turned, the interval between adjacent simulated cells remains the same. This ensures that the expansion amount simulated by each simulated cell is the same, directly simulating the degree of expansion change and the maximum value of the expansion. The process is controllable and adjustable. During testing, measurement can begin simply by turning the shaft, starting the test directly from the tensile stress on the components. There is no need for charge-discharge cycles of the battery pack, greatly saving the long waiting time for charge-discharge cycles before the tensile test and significantly shortening the testing cycle. Furthermore, compared to existing technologies where the battery pack is directly scrapped after the cycle charging test and cannot be reused, leading to continuously increasing testing costs, this simulation device can repeatedly simulate the expansion process, eliminating the need for a new battery pack and effectively reducing testing costs.

[0008] Preferably, the simulated battery cell includes a core body and a threaded sleeve. The core body has a threaded sleeve mounting hole for mounting the threaded sleeve. The threaded sleeve is detachably fixed in the threaded sleeve mounting hole, and the inner hole of the threaded sleeve forms the threaded hole of the simulated battery cell. The simulated battery cell is divided into a detachable core body and a threaded sleeve. Compared with the entire battery cell, the threaded sleeve has a smaller volume, is easier to machine the threaded hole, and its assembly process is simple and the connection is convenient.

[0009] Preferably, the threaded sleeve includes a sleeve body and a flange at the rear end of the sleeve body. The flange has an elongated hole extending circumferentially along the edge of the flange. The threaded sleeve is fixed to the core body by a fixing bolt passing through the elongated hole. After the threaded sleeve is screwed into place on the rotating shaft, if the left and right sides or the top and bottom sides of the simulated cells are not aligned, the threaded sleeve is rotated to change the rotation direction of the simulated cells, thereby adjusting the sides of each simulated cell to be aligned. The elongated hole allows the threaded sleeve to remain fastened to the core body with bolts even after rotation.

[0010] Preferably, the mounting hole for the threaded sleeve is a countersunk hole, and the flange is located within the countersunk hole. The countersunk hole allows the flange on the threaded sleeve to be recessed into it, enabling the threaded sleeve to be installed inside the core and fixedly connected. This allows the simulated cells to fit together, preventing the flange of the threaded sleeve from interfering with the fitting of adjacent simulated cells.

[0011] Preferably, a guide block is fixed on the core, and a guide rail is provided on the base to slide in conjunction with the guide block. The guide block and the guide rail have high fitting accuracy and stable sliding fit.

[0012] Preferably, the base has fixed upright plates at both its front and rear ends, and bearings are installed in the fixed upright plates; both ends of the rotating shaft are inserted and fixed in the bearings to allow the rotating shaft to rotate and be assembled on the base. The fixed upright plate structure is simple and facilitates the installation of the rotating shaft.

[0013] Preferably, the fixed upright plate includes a detachably connected bearing mounting plate and a connecting plate. The connecting plate is detachably fixed to the base, and the bearing mounting plate is assembled on the upper side of the connecting plate. If the rotating shaft becomes misaligned or the connection is unstable, simply replace the connecting plate. This facilitates installation and disassembly, as well as the connection setup of the fixed upright plate.

[0014] Preferably, both ends of the rotating shaft extend beyond the bearing mounting plate, so that both ends of the shaft can be screwed and rotated. Both ends of the rotating shaft can be used as operating rotation points for operator control, making process control more convenient.

[0015] Preferably, a top plate is fixed to the upper side of the simulated battery cell, and the surface of the top plate extends to the left and right sides of the cell. Extending the top plate to the left and right sides of the cell can reduce the volume of the battery cell while simulating the size of the upper surface of the actual battery cell.

[0016] Preferably, the simulated battery cell is made of a metallic material. This makes it easy to process, less prone to deformation, and thus has a longer service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the battery module simulation device provided by the present invention; Figure 2 for Figure 1 Top view of the battery module simulation device; Figure 3 for Figure 1 A schematic diagram of the simulated battery cell in a battery module simulation device; Figure 4 for Figure 3 A schematic diagram of the structure of a screw sleeve in a simulated battery cell; Figure 5 for Figure 3 A schematic diagram of the core structure in a simulated battery cell; Figure 6 for Figure 1 Assembly diagram of the base and rotating shaft in the battery module simulation device; Figure 7 for Figure 6 Front view of the assembly of the base and the pivot.

[0018] Explanation of reference numerals in the attached figures: 1. Base; 2. Guide rail; 3. Fixed upright plate; 4. Connecting plate; 5. Bearing mounting plate; 6. Bearing; 7. Simulated battery cell; 8. Core body; 9. Top plate; 10. Guide block; 11. Guide groove; 12. Rotating shaft; 13. Fixing hole; 14. Screw; 15. Fixing section; 16. Threaded adjustment section; 17. Screw sleeve; 18. Sleeve body; 19. Flange; 20. Long hole; 21. Fixing bolt; 22. Screw sleeve mounting hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising a…" does not exclude the process or method that includes said element.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0024] The present invention will be further described in detail below with reference to the embodiments.

[0025] Specific embodiment 1 of the battery module simulation device provided by the present invention: like Figures 1 to 7As shown, the battery module simulation device includes a base 1 and multiple simulated battery cells 7 slidably mounted on the base 1. The simulated battery cells 7 are arranged front-to-back along the length of the base 1. A rotating shaft 12 is rotatably mounted on the base 1. The rotating shaft 12 has threaded adjustment sections 16 with progressively smaller outer diameters and different pitches along its axial direction from front to back, creating a stepped structure. Each simulated battery cell 7 has threaded holes corresponding to one of the threaded adjustment sections 16. The threaded engagement between the threaded holes and the threaded adjustment sections 16 allows each simulated battery cell 7 to be screwed onto the rotating shaft 12. The operator can control the simulated battery cells 7 to move forward from a close, adjacent state to a more distant state, or to bring them closer together, thus simulating the expansion process of the battery cells in the battery module and allowing for repeated simulations. By adding structural adhesive, a heating film, and sampling FPC to the outside of the simulated battery cells 7, performance tests can be conducted on the tensile strength of each component and its ability to withstand battery module expansion.

[0026] like Figure 1 and Figure 6 As shown, the base 1 is a rectangular plate structure. Two guide rails 2 are fixed on the upper side of the base 1, which are parallel to the length direction of the base 1 and protrude from the upper side of the base 1. The guide rails 2 are used to guide and cooperate with each simulated battery cell 7. The guide rails 2 are long strip structures with an elliptical cross section, which are used to guide and slide with the simulated battery cell 7, so that each simulated battery cell 7 can slide back and forth along the guide rails 2.

[0027] like Figure 1 and Figure 2 As shown, a fixed upright plate 3 is provided at each of the front and rear ends of the base 1, and the fixed upright plate 3 is fixed to the upper side of the base 1. The fixed upright plate 3 includes a detachably connectable bearing mounting plate 5 and a connecting plate 4. The connection method of the fixed upright plate 3 is that the connecting plate 4 is assembled on the upper side of the base 1, and the bearing mounting plate 5 is assembled on the upper side of the connecting plate 4. Figure 2 As shown, the upper side of the bearing mounting plate 5 has vertically downward through-holes 13 at both ends, and the connecting plate 4 has through holes corresponding to the fixing holes 13 and also penetrating downwards. The base 1 has mounting holes corresponding to the fixing holes 13; these mounting holes are threaded holes. By inserting screws 14, which fit the threaded holes, from top to bottom onto the upper side of the bearing mounting plate 6, the bearing mounting plate 5 and the connecting plate 4 are simultaneously pressed and fixed onto the base 1. Wherein, as... Figure 1 As shown, a bearing 6 is installed between the bearing mounting plate 5 and the rotating shaft 12.

[0028] like Figure 6 and Figure 7As shown, the rotating shaft 12 is the core of the entire battery module simulation device, enabling it to simulate the expansion and contraction of the battery module. The rotating shaft 12 is rotatably mounted between two fixed upright plates 3 above the base 1. Both ends of the rotating shaft 12 are equipped with fixed sections 15 that can be inserted into the inner holes of bearings 6 and fixed to the inner rings of bearings 6. The inner rings of bearings 6 rotate with the rotating shaft 12. Both fixed sections 15 extend beyond the bearings 6, allowing the operator to screw them in. Between the two fixed sections 15, multiple threaded adjustment sections 16 are arranged in a stepped pattern, with the outer diameter decreasing progressively from the front end to the rear end of the rotating shaft 12. (The text abruptly ends here.) Figure 6 and Figure 7 As shown, the rotating shaft 12 has sixteen threaded adjustment sections 16, each with an external thread of different pitch. The pitch of the threaded adjustment section 16 increases sequentially from the end with the largest outer diameter to the end with the smallest outer diameter. This ensures that the absolute value of the pitch difference between any two threaded adjustment sections 16 is not zero. In this invention, the absolute value of the pitch difference between any two adjacent threaded adjustment sections 16 is equal to 'a', where 'a' is greater than zero.

[0029] like Figure 1 As shown, each of the simulated battery cells 7 is screwed onto the rotating shaft 12, and sixteen simulated battery cells 7 are assembled corresponding to sixteen threaded adjustment sections 16. Each simulated battery cell 7 includes a core body 8 and a detachable threaded sleeve 17 within the core body 8. The core body 8 is made of metal material, such as... Figures 3 to 5 As shown, the core 8 is a block structure. A top plate 9 is fixed to the upper side of the core 8 by four bolts. The fit of the top plate 9 reduces the width and size of the core 8. Figure 5 As shown, a threaded sleeve mounting hole 22 is provided in the middle of the core 8. The threaded sleeve mounting hole 22 is a stepped countersunk hole. Figure 4As shown, the threaded sleeve 17 includes a sleeve body 18 and a flange 19 at the rear end of the sleeve body 18. An elongated hole 20 extending circumferentially along the edge of the flange 19 is provided on the flange 19. The threaded sleeve 17 passes through the threaded sleeve mounting hole 22. The flange 19 is submerged in the countersunk hole and stopped by the bottom surface of the larger inner diameter of the countersunk hole. A fixing bolt 21 passes through the elongated hole 20 on the flange 19 and is screwed into the bottom of the groove 23 through the elongated hole 20. The bottom surface of the groove 23 has an elongated threaded hole adapted to the bolt. In this embodiment, the threaded sleeve 17 is first screwed onto the threaded adjustment section 16 with the larger outer diameter at the front end of the rotating shaft 12. Then, the remaining threaded sleeves 17 are screwed onto the threaded adjustment section 16 sequentially along the axial direction of the rotating shaft 12. Next, the core 8 is sequentially fitted onto the threaded sleeves 17. Finally, the fixing bolt 21 is used to connect and tighten the threaded sleeve 17 and the core 8. When inserting the fixing bolts 21, if the initial contact positions of two adjacent cores 8 on the rotating shaft 12 are not parallel, the fit between the threaded sleeve 17 and the core 8 can be loosened by tightening the fixing bolts 21, and then the core 8 can be rotated to adjust each simulated cell 7 to a parallel and contacted initial state. To make the fixing bolts 21 adjustable, the flange 19 of the threaded sleeve 17 should be set at the rear end of the sleeve body 18, so that after each core 8 on the threaded sleeve 17 is inserted, the fixing bolts 21 can be adjusted from the rear end to adjust each simulated cell 7 to be aligned.

[0030] like Figure 1 As shown, each threaded sleeve 17 has an internal thread in its inner hole that corresponds to the threaded adjustment section 16 of the rotating shaft 12, so that the simulated battery cell 7 can be screwed onto the rotating shaft 12. Since the outer diameter and pitch of the threaded adjustment sections 16 are all different, the diameter and pitch of the internal threaded holes of the threaded sleeves 17 are also different. In this embodiment, the threaded sleeves 17 and the threaded adjustment sections 16 correspond one-to-one. After the simulated battery cell 7 is assembled on the rotating shaft 12, the pitch of the threaded inner holes in adjacent threaded sleeves 17 gradually increases from front to back.

[0031] like Figure 3 As shown, two guide blocks 10 are provided below the core 8. Each guide block 10 includes a downward-facing guide groove 11, which is an elliptical groove adapted to the guide rail 2. This allows the guide blocks 10 and the guide rail 2 to slide smoothly together, enabling each simulated battery cell 7 to slide back and forth on the guide rail 2 through the cooperation of the two guide blocks 10 and the guide rail 2. Through the guiding cooperation between the guide rail 2 and the guide blocks 10, and the threaded cooperation between the screw sleeve 17 and the rotating shaft 12, the operator can achieve the sliding of the simulated battery cell 7 on the base 1 by turning the rotating shaft 12.

[0032] In this embodiment, the external threads on each threaded adjustment section 16 have the same direction of rotation. Since the difference in pitch between adjacent threaded adjustment sections 16 of the shaft 12 is a fixed value, when the operator screws the shaft 12, each battery cell moves a different distance in the same direction, but the spacing between each simulated battery cell 7 remains the same. Because the spacing between each battery cell remains equal, the operator screws the shaft 12 to move each simulated battery cell 7 away from each other and increase the spacing, thus simulating the same expansion process of each battery cell. After simulating one process, the operator screws the shaft 12 in the opposite direction to move each simulated battery cell 7 closer to each other and decrease the spacing, so that the simulation process can be repeated.

[0033] In this embodiment, the outer diameter of the fixed section 15 located at the front end of the rotating shaft 12 is larger than the outer diameter of the fixed section 15 located at the rear end of the rotating shaft 12. Therefore, in order to ensure that the shaft centers at both ends of the rotating shaft 12 are at the same height relative to the base 1, the height and size of the bearing mounting plates 5 and the connecting plates 4 at both ends of the base 1 are different. By replacing the connecting plates 4 of different heights according to the actual stability of the rotating shaft 12, the rotating shaft 12 can be leveled, ensuring that the bottom of the battery module simulation device is flat and the shaft center of the rotating shaft 12 is horizontal after assembly.

[0034] In this invention, to facilitate the processing of each simulated battery cell 7, each screw sleeve 17 is first screwed onto the rotating shaft 12, and then a simulated battery cell blank is placed on the screw sleeve 17. By placing the simulated device with the simulated battery cell blank on the machine tool, the sides, top and bottom surfaces of each simulated battery cell are cut, thereby making the sides, top and bottom surfaces of each simulated battery cell with higher flatness and facilitating the installation of other accessories.

[0035] Specific embodiment 2 of the battery module simulation device provided by the present invention: The difference from Embodiment 1 is that, in Embodiment 1, the simulated battery cell 7 includes a core body 8 and a threaded sleeve 17, which are detachably fixedly connected by bolts. In this embodiment, the threaded sleeve is first screwed onto the rotating shaft, and the core body is then fitted onto the threaded sleeve. The core body is then adjusted so that each simulated battery cell is parallel and aligned. After the simulated battery cells are aligned during installation, the core body is welded one by one to its corresponding threaded sleeve.

[0036] Specific embodiment 3 of the battery module simulation device provided by the present invention: The difference from Embodiment 1 is that, in Embodiment 1, the threaded sleeve 17 includes a sleeve body 18 and a flange 19, and the core body 8 is provided with a threaded sleeve mounting hole 22 for mounting the threaded sleeve 17, and the threaded sleeve mounting hole 22 is a countersunk hole. In this embodiment, the threaded sleeve is set as a cylindrical structure of equal diameter, and the threaded sleeve mounting hole provided on the core body is a through hole adapted to the equal diameter threaded sleeve cylinder, and the threaded sleeve is embedded and fixed in the through hole on the core body.

[0037] Specific embodiment 4 of the battery module simulation device provided by the present invention: The difference from Embodiment 1 is that, in Embodiment 1, a guide block 10 is fixed on the lower side of the core 8, and a guide rail 2 is provided on the base 1 that slides and engages with the guide block 10. In this embodiment, the guide block is omitted, and a guide groove is formed on the lower side of the core to guide and engage with the guide rail, allowing the core to slide and be fitted onto the guide rail via the guide groove. In other embodiments, the guide rail is omitted, and an inverted T-shaped groove extending along the length of the base is formed on the base. The guide block on the lower side of the core is set as a T-shaped slider that can guide and engage with the T-shaped groove, so that the simulated battery cell can be slidably assembled onto the base.

[0038] Specific embodiment 5 of the battery module simulation device provided by the present invention: The difference from Embodiment 1 is that, in Embodiment 1, both ends of the base 1 along its length are provided with vertically arranged fixed plates 3. The fixed plates 3 include detachably connectable bearing mounting plates 5 and connecting plates 4. In this embodiment, the fixed plate is a single, integral plate, with its lower end fixed to the base and a bearing positioned in the middle. Therefore, the bearing's position needs to be precisely calculated to level the rotating shaft.

[0039] Specific embodiment 6 of the battery module simulation device provided by the present invention: The difference from Embodiment 1 is that, in Embodiment 1, the fixed sections 15 at both ends of the rotating shaft 12 extend out of the bearing mounting plate 5, so that both ends of the rotating shaft 12 can be rotated. In this embodiment, one end of the rotating shaft extends out of the bearing and the bearing mounting plate, while the other end is fixed in the inner hole of the bearing.

[0040] Specific embodiment 7 of the battery module simulation device provided by the present invention: The difference from Example 1 is that, in Example 1, the simulated battery cell was made of a metallic material. In this example, the simulated battery cell is made of a mixture of metallic and non-metallic materials. In other different embodiments, non-metallic materials may also be used to make the simulated battery cell.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery module simulation device, characterized in that, The device includes a base (1) and simulated battery cells (7) that are guided and slidably mounted on the base (1). Multiple simulated battery cells (7) are arranged longitudinally along the length of the base (1), and each simulated battery cell (7) has a coaxial threaded hole. The battery module simulation device also includes a rotating shaft (12), which is rotatably mounted on the base (1). The rotating shaft (12) includes multiple threaded adjustment sections (16) arranged axially. Each simulated battery cell (7) has a threaded hole corresponding to one of the threaded adjustment sections (16). The adjustment section (16) is threadedly engaged with the threaded hole of the corresponding simulated cell (7); the outer diameter of the thread adjustment section (16) on the front side of two adjacent thread adjustment sections (16) is larger than the outer diameter of the thread adjustment section (16) on the rear side, and each thread adjustment section (16) is stepped; the absolute value a of the difference between the thread pitches of any two adjacent thread adjustment sections (16) is equal and a is greater than zero, so that when the rotating shaft (12) rotates and drives each simulated cell (7) to move, the distance between any two adjacent cells remains equal.

2. The battery module simulation device according to claim 1, characterized in that, The simulated battery cell (7) includes a core body (8) and a screw sleeve (17). The core body is provided with a screw sleeve mounting hole (22) for mounting the screw sleeve (17). The screw sleeve (17) is detachably fixed in the screw sleeve mounting hole (22). The inner hole of the screw sleeve (17) forms the threaded hole of the simulated battery cell (7).

3. The battery module simulation device according to claim 2, characterized in that, The threaded sleeve (17) includes a sleeve body (18) and a flange (19) located at the rear end of the sleeve body (18). The flange (19) is provided with an elongated hole (20) extending circumferentially along the edge of the flange (19). The threaded sleeve (17) is fixed to the core body (8) by passing a fixing bolt (21) through the elongated hole (20).

4. The battery module simulation device according to claim 3, characterized in that, The threaded sleeve mounting hole (22) is a countersunk hole, and the flange (19) is located inside the countersunk hole.

5. The battery module simulation device according to claim 2, 3, or 4, characterized in that, The core (8) is fixed with a guide block (10), and the base (1) is provided with a guide rail (2) that slides with the guide block (10).

6. The battery module simulation device according to any one of claims 1-4, characterized in that, The base (1) has fixed plates (3) at both the front and rear ends, and bearings (6) are provided in the fixed plates (3); the two ends of the rotating shaft (12) are fixed in the bearings (6) so that the rotating shaft (12) can rotate and be assembled on the base (1).

7. The battery module simulation device according to claim 6, characterized in that, The fixed plate (3) includes a detachably connected bearing mounting plate (5) and a connecting plate (4). The connecting plate (4) is detachably fixed on the base (1), and the bearing mounting plate (5) is assembled on the upper side of the connecting plate (4).

8. The battery module simulation device according to claim 6, characterized in that, Both ends of the shaft (12) extend out of the bearing mounting plate (5) so that both ends of the shaft (12) can be rotated.

9. The battery module simulation device according to any one of claims 2-4, characterized in that, The simulated battery cell (7) has a top plate (9) fixed on its upper side, and the surface of the top plate (9) extends to the left and right sides of the core (8).

10. The battery module simulation device according to any one of claims 1-4, characterized in that, The simulated battery cell (7) is made of metallic material.

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