Simulation cell and battery pack testing device

Abstract

The utility model relates to the field of power battery packs, in particular to a simulation battery cell and a battery pack testing device, the simulation battery cell comprises a simulation battery cell body, and the appearance contour of the simulation battery cell body is the same as that of a target battery cell unit; the simulated battery cell body comprises a component I, a component II, a connecting piece and a limiting structure; the first component and the second component are oppositely arranged in the first direction, the connecting piece penetrates through the first component in the first direction to be fixedly connected with the second component, and detachable connection of the first component and the second component is achieved. The limiting structure is used for limiting the relative displacement of the first component and the second component in the second direction. The device can effectively simulate the actual assembly state of the battery cell, has detachability, and can be repeatedly used.

Description

Technical Field

[0001] This utility model relates to the field of power battery packs, specifically to a device for simulating battery cells and battery pack testing. Background Technology

[0002] Currently, the mainstream integration methods for power batteries adopt CTP, CTV, and CTC integrated structures. These structures eliminate traditional mechanical connections, replacing them with adhesive bonding using structural adhesives. Due to thermal management requirements, thermally conductive adhesives with both bonding and thermal conductivity functions are used. To verify the coating process, it's necessary to consider both adhesive strength and thermal conductivity (achieving a certain adhesive thickness and coverage after curing in the battery box) and the cost of auxiliary materials (minimizing adhesive usage). Therefore, during the process verification phase, a testing method for coating performance verification is needed to support the determination of adhesive application amount, coating trajectory, and the actual curing effect after the battery cells are placed in the battery box.

[0003] In existing technologies, companies often use actual samples to follow the normal assembly process, remove the battery cells after the adhesive has cured, and then evaluate the adhesive effect. Because the product is not disassembled and repairable, all samples must be scrapped after verification. If the verified process parameters do not meet the design requirements, additional samples need to be added for further verification, resulting in high costs and low efficiency for this verification method. Utility Model Content

[0004] The purpose of this invention is to provide a device for simulating battery cell and battery pack testing, which can effectively simulate the actual assembly state of battery cells and is detachable and reusable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, this utility model provides a simulated battery cell, including a simulated battery cell body, the outer contour of which is the same as that of a target battery cell unit; the simulated battery cell body includes a first component, a second component, a connector, and a limiting structure; the first component and the second component are arranged opposite to each other along a first direction, the connector passes through the first component along the first direction and is fixedly connected to the second component, thereby realizing a detachable connection between the first component and the second component; the limiting structure is used to limit the relative displacement of the first component and the second component in a second direction.

[0007] Furthermore, the first component is provided with a through hole for the connector to pass through, and the second component is provided with a first mounting hole that corresponds to and mates with the end of the connector.

[0008] Furthermore, the connector is a screw, and the end of the through hole opposite to the second component is provided with a countersunk hole adapted to the head of the screw, and the first mounting hole is a threaded hole adapted to the end of the screw.

[0009] Furthermore, the limiting structure includes a first inclined surface disposed on the first component and a second inclined surface disposed on the second component and corresponding to and cooperating with the first inclined surface. The first inclined surface is perpendicular to the reference plane. The reference plane is a plane passing through the first reference line and the second reference line. The first reference line is a straight line extending from the geometric center of the simulated cell body in a first direction, and the second reference line is a straight line extending from the geometric center of the simulated cell body in a second direction.

[0010] Furthermore, the angle between the first inclined plane and the vertical plane is 30°~60°.

[0011] Furthermore, the limiting structure includes a boss disposed on the first component and a groove disposed on the second component and corresponding to the boss; the number of the bosses is two, the two bosses are arranged at intervals along the second direction, and the two bosses are respectively arranged on the lower edge of the first component.

[0012] Furthermore, the limiting structure includes a limiting member, which is arranged between the first component and the second component, and the limiting member has limiting portions at both ends. The sides of the first component and the second component are provided with limiting grooves that correspond to and cooperate with the limiting portions.

[0013] Furthermore, the first direction is the height direction of the simulated battery cell body, and the second direction is the thickness direction of the simulated battery cell body.

[0014] Furthermore, a second mounting hole for connecting a disassembly tool is provided on the surface of component one facing away from component two.

[0015] Secondly, this utility model provides a battery pack testing device, including a battery pack housing for accommodating a simulated battery pack module; the simulated battery pack module includes a plurality of spaced-apart cell assemblies, each cell assembly including an end plate, a cell unit and the aforementioned simulated cell, and multiple cell units stacked and fixed between two end plates along their thickness direction, the simulated cell being arranged between two adjacent stacked cell units.

[0016] This invention offers the following unexpected advantages: The simulated battery cell body adopts the exact same outline as the target battery cell unit, ensuring a 1:1 replication of the actual battery cell's dimensions and mechanical interfaces during installation in battery packs, modules, and other supporting structures, effectively simulating the actual assembly state of the battery cell. The limiting structure effectively restricts the relative displacement of component one and component two in the second direction, and, combined with the mechanical clamping force in the first direction, ensures a stable connection between adjacent battery cells, enhancing the overall reliability of the battery pack structure and avoiding the risk of displacement due to vibration or external forces. Furthermore, when disassembling the simulated battery body, by prioritizing the disassembly of component one, the mechanical clamping force on both end plates of the battery cell assembly is quickly released, simplifying the complex process of traditional overall disassembly into the separation of a single component, making the removal and replacement of battery cells more convenient. Moreover, the detachable structure of the simulated battery cell supports the reuse of the simulated battery cell and other battery cells, reducing battery cell loss due to testing. Simultaneously, the modular design reduces manufacturing costs, aligning with the development trends of green manufacturing and the circular economy. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0018] Figure 1 A schematic diagram of the structure of the simulated battery cell described in Embodiment 1 of this utility model is shown.

[0019] Figure 2 A cross-sectional schematic diagram of the simulated battery cell described in Embodiment 1 of this utility model is shown.

[0020] Figure 3 A cross-sectional schematic diagram of a preferred embodiment of the simulated battery cell described in Embodiment 1 of this utility model is shown.

[0021] Figure 4 A schematic diagram of the structure of the simulated battery cell described in Embodiment 2 of this utility model is shown.

[0022] Figure 5 A schematic diagram of the structure of the simulated battery cell described in Embodiment 3 of this utility model is shown.

[0023] Figure 6 A cross-sectional schematic diagram of the simulated battery cell described in Embodiment 3 of this utility model is shown.

[0024] Figure 7 A schematic diagram of the structure of the simulated battery cell described in Embodiment 4 of this utility model is shown.

[0025] Figure 8A cross-sectional schematic diagram of the simulated battery cell described in Embodiment 4 of this utility model is shown.

[0026] Figure 9 A schematic diagram of the battery pack testing device according to Embodiment 5 of this utility model is shown.

[0027] In the figure, 1—component one, 11—through hole, 111—counter-sunken hole, 12—second mounting hole, 2—component two, 21—first mounting hole; 3—connector, 4—limiting structure, 41—first inclined surface, 42—second inclined surface, 43—boss, 44—groove, 45—limiting component, 46—limiting part, 47—limiting groove, 48—mounting groove, 5—disassembly tool, 6—end plate, 7—cell unit. Detailed Implementation

[0028] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0029] Example 1, see Figure 1 and Figure 2 As shown, this utility model provides a simulated battery cell, including a simulated battery cell body. The outer contour of the simulated battery cell body is the same as that of the target battery cell unit, ensuring that when installed in supporting structures such as battery packs and modules, the occupancy size and mechanical interface of the real battery cell can be reproduced 1:1, effectively simulating the actual assembly state of the battery cell. It should be noted that the simulated battery cell body is reasonably set according to the real battery cell, and the simulated battery cell body is equipped with counterweights according to actual needs, so that the size and weight of the simulated battery cell body can be consistent with the real battery cell, so as to meet the scenario of battery cells of the same size but different weights.

[0030] The simulated battery cell body includes component 1, component 2, connector 3, and limiting structure 4. Component 1 and component 2 are arranged opposite to each other along a first direction. The connector 3 passes through component 1 along the first direction and is fixedly connected to component 2, thereby realizing a detachable connection between component 1 and component 2. The limiting structure 4 is used to limit the relative displacement of component 1 and component 2 in a second direction.

[0031] Because the limiting structure 4 effectively restricts the relative displacement of component 1 and component 2 in the second direction, combined with the mechanical clamping force in the first direction, it ensures a stable connection between adjacent battery cells 7, enhancing the overall reliability of the battery pack structure and avoiding the risk of displacement due to vibration or external forces. Furthermore, when disassembling the simulated battery body, by prioritizing the removal of component 1, the mechanical clamping force on the end plates 6 of the battery cell assembly is quickly released, simplifying the complex process of traditional overall disassembly into the separation of a single component, making the removal and replacement of battery cells more convenient. Moreover, the detachable structure of the simulated battery cell supports the reuse of the simulated battery cell and other battery cells, reducing cell loss due to testing. Simultaneously, the modular design reduces manufacturing costs, aligning with the development trends of green manufacturing and the circular economy.

[0032] As a preferred embodiment of this example, see Figure 2 As shown, component 1 has a through hole 11 for the connector 3 to pass through, and component 2 has a first mounting hole 21 that corresponds to the end of the connector 3.

[0033] This design allows the connector 3 to pass smoothly through component 1 and mate with the end of component 2. Compared to other complex connection structures, this simplifies the installation process of component 1 and component 2 in the simulated battery cell body. When assembling the simulated battery cell, the operator can quickly position the connector 3, pass it through the through hole 11, and align it with the first mounting hole 21 for connection, significantly improving assembly efficiency and reducing installation time and labor costs.

[0034] The through hole 11 and the first mounting hole 21 precisely mate with the connector 3, ensuring the accurate relative position of component 1 and component 2 during connection. Once the connector 3 is fixed, it effectively restricts the displacement of component 1 and component 2 in the axial direction of the connector 3. Combined with the constraint of the limiting structure 4 on the displacement in the second direction, this makes the connection of the simulated battery cell more stable in all directions. In battery packs, modules, and other supporting structures, it can better cope with mechanical vibrations, collisions, and other working conditions, ensuring that the simulated battery cell will not affect the simulation effect of the real battery cell assembly state due to loose connections during use.

[0035] This simple and standard structure, combining the through hole 11 and the first mounting hole 21 with the connector 3, allows for flexible replacement of connectors of different specifications to meet the needs of different target battery cell units. Furthermore, for different models of analog battery cell bodies, connection can be achieved as long as the dimensions of the through hole 11 and the first mounting hole 21 are compatible with the connector 3. This improves the versatility of the structure in various analog battery cell designs, helps reduce design and production costs, and accelerates the research, development, and upgrading of analog battery cell products.

[0036] Furthermore, the connector 3 is a screw, and the end of the through hole 11 opposite to the component 2 is provided with a countersunk hole 111 that is adapted to the head of the screw. The first mounting hole 21 is a threaded hole that is adapted to the end of the screw.

[0037] Using a screw as connector 3, which matches the threaded hole on component 2, provides stronger fastening force compared to ordinary connectors. During battery pack and module operation, the simulated battery cell faces a complex mechanical environment. The tight engagement of the screw and threaded hole effectively prevents relative displacement between component 1 and component 2 due to vibration, impact, or other external forces, further ensuring the structural stability of the simulated battery cell when simulating the assembly state of a real battery cell, and ensuring the accuracy and reliability of the simulation results.

[0038] Furthermore, the connection between the screw and the threaded hole is simple to operate; workers only need common tools such as screwdrivers and wrenches to easily assemble and disassemble the simulated battery cells. When maintenance, replacement, or reassembly of the simulated battery cells is required, this method can significantly shorten operation time and improve work efficiency. Moreover, because the screw specifications are relatively standardized, procurement and replacement are more convenient, reducing maintenance costs.

[0039] Meanwhile, as a common and highly standardized connector, the screw has a relatively low procurement cost. Furthermore, the machining processes for the countersunk hole 111 and threaded hole are mature, eliminating the need for complex, high-precision machining techniques in the manufacturing of components 1 and 2, further reducing production costs. In addition, its excellent versatility allows for adaptation in different simulated battery cell designs simply by adjusting the screw specifications according to actual needs, reducing the high development costs associated with customized connectors.

[0040] Because the end of component 1 facing away from component 2 has a countersunk hole 111 that matches the screw head, the screw head can be fully embedded in the countersunk hole 111. In this way, the overall appearance of the simulated battery cell is flatter, which not only avoids the risk of collision damage that may be caused by the protruding screw head, but also prevents interference with other components inside the battery pack.

[0041] As a preferred embodiment of this example, see Figure 1 and Figure 3 As shown, the limiting structure 4 includes a first inclined surface 41 disposed on the first component 1, and a second inclined surface 42 disposed on the second component 2 and corresponding to and cooperating with the first inclined surface 41. The first inclined surface 41 is perpendicular to the reference plane. The reference plane is a plane passing through the first reference line and the second reference line. The first reference line is a straight line extending from the geometric center of the simulated cell body in a first direction, and the second reference line is a straight line extending from the geometric center of the simulated cell body in a second direction.

[0042] Specifically, the first inclined surface 41 is the diagonal surface of the cuboid component 1, and the second inclined surface 42 is the diagonal surface of the cuboid component 2.

[0043] When the simulated battery cell is installed in the battery pack or module and subjected to external forces from various directions, the first inclined surface 41 and the second inclined surface 42 press against each other, dispersing the external forces and preventing component 1 and component 2 from easily misaligning in the second direction. This limiting structure 4 ensures the structural stability of the simulated battery cell body, maintains its accurate simulation of the actual battery cell assembly state, and ensures that the overall performance of the battery pack is not affected.

[0044] The corresponding fit of the two inclined planes provides clear guidance for the assembly of component 1 and component 2. When assembling the simulated battery cell, workers only need to align component 1 and component 2 according to the corresponding relationship of the inclined planes to quickly achieve initial positioning, reducing assembly difficulty and adjustment time during the assembly process. Compared with some complex limiting structures, this inclined plane fit is more intuitive and efficient, helping to improve production efficiency, and its advantages are particularly evident in the large-scale production of simulated battery cells.

[0045] The precise limiting structure 4 ensures that the simulated cell body is firmly connected between two adjacent stacked cell units 7 under the mechanical clamping force of the two end plates 6, thus more accurately simulating the stress state and assembly position of the real cell in the battery pack. Due to the perpendicular relationship between the first inclined plane 41 and a specific reference plane, and the clear setting of the reference line, the position and orientation of the simulated cell in various dimensions can be precisely controlled, providing more reliable data support for the research and development and testing of battery packs and modules, and helping to improve the design and optimization level of the battery system. Furthermore, the design of this inclined plane limiting structure is relatively simple. During the manufacturing process of component 1 and component 2, complex processing techniques and high-precision manufacturing equipment are not required. Only the corresponding inclined plane needs to be processed according to the predetermined design parameters, reducing manufacturing costs. During maintenance, if the simulated cell malfunctions and needs to be disassembled, the inclined plane structure also facilitates the quick separation of component 1 and component 2 by staff, reducing maintenance time and costs. Moreover, due to its simple structure, it is easier to find suitable parts when replacing some components, further reducing maintenance difficulty and costs.

[0046] Furthermore, the angle between the first inclined plane and the vertical plane is 30°~60°, achieving an optimal ability to resist external forces in the second direction. Within this angle range, the components of the forces interacting between the inclined planes can better balance external forces from various directions. When the battery pack is subjected to a horizontal impact force, the angle allows the combined force of the frictional force and the supporting force generated between the inclined planes to effectively offset part of the impact force, preventing component 1 and component 2 from displacing in the second direction and enhancing the structural stability of the simulated battery cell under complex stress environments.

[0047] This angle range is beneficial for distributing the mechanical clamping force applied by end plate 6 reasonably onto component 1 and component 2. Taking a common 45° angle as an example, the clamping force is decomposed into two components on the inclined plane, which can act evenly on the components, avoid local stress concentration, prevent component damage due to excessive stress, thereby improving the durability of the simulated battery cell and ensuring long-term stable simulation of the assembly state of the real battery cell.

[0048] Angles ranging from 30° to 60° are considered relatively standard and easily achievable in machining. Whether using common machining processes such as milling and turning, or automated machining equipment, it is relatively easy and accurate to machine the required bevels. This reduces the scrap rate in the production process, improves production efficiency, and compared to complex or special angles, effectively reduces machining time and costs while ensuring the stability of product quality.

[0049] For mold-forming production methods, this angle range simplifies mold design and manufacturing, and provides better versatility. A single mold can be used to produce various models of analog battery cells within this angle range, reducing the number and cost of mold development, shortening the R&D cycle for new products, and enabling companies to quickly respond to market demands and launch diversified analog battery cell products.

[0050] As a preferred embodiment of this example, see Figure 1 As shown, the first direction is the height direction of the simulated battery cell, and the second direction is the thickness direction of the simulated battery cell. This helps establish a unified directional reference standard throughout the design, production, and testing processes of the entire battery system. Whether designers are planning the layout of battery packs and modules, workers on the production line are assembling simulated battery cells, or testers are evaluating the performance of the battery system, this clear directional definition can help avoid design errors, assembly mistakes, or testing deviations caused by inconsistent understanding of directions, thereby improving work efficiency and product quality.

[0051] In the development of battery systems, accurately understanding the stress on simulated cells in different directions is crucial. By clearly defining the height and thickness directions, engineers can more accurately perform mechanical analysis on the gravity, compressive forces, vibration forces, and other forces experienced by the simulated cells during use. When calculating the vibration stress generated by vehicle bumps in the simulated cells inside the battery pack, a more accurate mechanical model can be established based on the defined height and thickness directions. This provides a reliable basis for optimizing the structural design of the battery system and ensures the stability and reliability of the simulated cells under complex operating conditions.

[0052] As a preferred embodiment of this example, see Figure 2 As shown, component 1 has a second mounting hole 12 on its surface opposite to component 2, which connects to the disassembly tool 5. The second mounting hole 12 greatly facilitates the disassembly of the analog battery cell. When maintenance, replacement, or reassembly of the analog battery cell is required, the operator only needs to connect the corresponding disassembly tool 5 to the second mounting hole 12. Using the leverage of the tool or other mechanical force, component 1 can be easily separated from its connection with component 2. Compared to the need for complex prying and pulling operations without this mounting hole, this significantly reduces the difficulty of operation and effectively prevents damage to other components of the analog battery cell due to improper disassembly, improving the efficiency and safety of maintenance work.

[0053] The second mounting hole 12 is designed with good versatility, accommodating a variety of common disassembly tools, such as screwdrivers, wrenches, and specialized disassembly clamps. This allows workers to easily find the appropriate tools to perform simulated battery cell disassembly operations under different working scenarios and tool availability conditions.

[0054] Example 2, see Figure 4 As shown, this utility model provides a simulated battery cell. Unlike embodiment one, the cross-section of component 1 is a right trapezoid, and component 2 is provided with a platform that matches the lower plane of component 1.

[0055] This design provides a more robust support structure. When subjected to external forces, the hypotenuse of the right trapezoid can decompose the force along the inclined plane, similar to the force dispersion effect of the inclined plane structure in Embodiment 1, reducing the risk of structural damage caused by concentrated forces. When the battery pack is subjected to external pressure or vibration, this structure can better maintain the overall shape and position of the simulated battery cell, preventing misalignment of component 1 and component 2, ensuring the reliability of the simulated battery cell when simulating the assembly state of a real battery cell, and providing a guarantee for the stable operation of the battery system.

[0056] The right-angled trapezoidal component design optimizes the spatial layout of the simulated battery cells to a certain extent. Compared with traditional rectangular or other shaped components, the right-angled trapezoid can be flexibly designed according to the internal spatial shape of the battery pack and module, better filling the space and improving space utilization.

[0057] From a manufacturing process perspective, the right-angled trapezoidal component 1 and its matching platform structure are relatively simple. Whether using machining or mold forming, no complex processes or high-precision equipment are required. This reduces the scrap rate, increases production efficiency, and minimizes the high costs associated with complex processes and equipment. Furthermore, this simple structure offers good versatility; for different models of analog battery cells, only appropriate adjustments to the dimensions are needed to apply the same manufacturing processes and molds, further reducing manufacturing costs and enhancing the company's market competitiveness.

[0058] Example 3, see Figure 5 and Figure 6 As shown, this utility model provides a simulated battery cell. Unlike Embodiment 1, the limiting structure 4 includes a boss 43 disposed on the first component 1 and a groove 44 disposed on the second component 2 and correspondingly cooperating with the boss 41. There are two bosses 43, which are arranged at intervals along the second direction, and the two bosses 43 are respectively disposed on the lower edge of the first component 1.

[0059] The boss 43 on component 1 engages with the corresponding groove 44 on component 2, precisely limiting the relative displacement of components 1 and 2 in the second direction. The two bosses 43 are spaced apart along the second direction and located at the lower edge of component 1. This arrangement provides support and restraint at multiple locations, more effectively preventing twisting or displacement of components 1 and 2 under external forces compared to a single boss or other distribution methods. This restraint structure 4 ensures that the simulated cell maintains a stable assembly state, simulating the working environment of a real cell in a battery system, providing a reliable basis for battery pack performance testing and development.

[0060] The mating mechanism of the boss 43 and the groove 44 provides clear positioning markers for the assembly of the simulated battery cell. During assembly, workers only need to align the boss 43 on component 1 with the groove 44 on component 2 to easily complete the initial positioning, greatly reducing the assembly difficulty. Compared with some complex limiting connection structures, this reduces the time spent on repeated adjustments and alignment, improving assembly efficiency.

[0061] The spaced arrangement of the two bosses 43 increases the flexibility and adaptability of the limiting structure. In different battery pack and module designs, the spacing between the bosses 43 and the dimensions of the bosses 43 and the grooves 44 can be flexibly adjusted according to the actual spatial layout and stress conditions to adapt to different assembly requirements. This adjustability enables this simulated cell to be widely used in various types of battery systems, from small energy storage devices to large electric vehicle battery packs, achieving good compatibility through appropriate parameter adjustments and expanding the product's application range.

[0062] The boss 43 is located at the lower edge of component 1. When subjected to external forces, it can evenly distribute the force to component 1 and component 2, avoiding stress concentration in localized areas. Because the boss 43 and the groove 44 fit tightly together, the entire structure can work together to withstand external pressure or tension on the simulated cell, improving the overall structural strength of the simulated cell. During long-term use of the battery pack, this design can effectively extend the lifespan of the simulated cell, reduce replacement and maintenance costs due to structural damage, and ensure the long-term stable operation of the battery system.

[0063] From a manufacturing process perspective, the machining of bosses 43 and grooves 44 is relatively simple. Whether using machining processes such as milling and drilling, or mold forming, bosses 43 and grooves 44 that meet precision requirements can be manufactured relatively easily. Compared to some complex limiting structures, high-precision machining equipment and complex processes are not required, reducing the scrap rate and improving production efficiency. Furthermore, due to its simple manufacturing process, for different models of analog battery cells, only the dimensions of bosses 43 and grooves 44 need to be adjusted to use the same machining process and molds, further reducing manufacturing costs and enhancing the product's market competitiveness.

[0064] Example 4, see Figure 7 and Figure 8 As shown, this utility model provides a simulated battery cell. Unlike embodiment one, the limiting structure 4 includes a limiting member 45, which is arranged between component 1 and component 2. The limiting member 45 has limiting portions 46 at both ends, and the sides of component 1 and component 2 have limiting grooves 47 that correspond to and cooperate with the limiting portions 46.

[0065] The limiting component 45, as an independent part, offers greater flexibility during assembly. Precise assembly of the simulated battery cell is achieved through the precise cooperation between the limiting part 46 and the limiting groove 47. Furthermore, the design of the limiting component 45 and the limiting groove 47 can be flexibly adjusted according to different application requirements, including the shape and size of the limiting part 46 and the position and depth of the limiting groove 47. In battery pack or module designs with special spatial layout requirements, a well-designed limiting structure 4 enables the simulated battery cell to better adapt to complex spatial environments.

[0066] From a manufacturing process perspective, the machining of the limiting component 45 and the limiting groove 47 is relatively simple. The limiting component 45 can be manufactured using common processes such as injection molding and stamping. The machining of the limiting groove 47 on the sides of component 1 and component 2 is also relatively easy, without requiring high-precision machining equipment or complex processes. This not only reduces the scrap rate in the production process and improves production efficiency, but also effectively controls manufacturing costs. Moreover, since the limiting component 45 is an independent component, when producing different models of analog battery cells, only the design of the limiting component 45 needs to be adjusted as needed, without requiring large-scale modifications to the overall structure of component 1 and component 2, further improving production flexibility and economy.

[0067] In a preferred embodiment of this invention, in order to enable the first component 1 and the second component 2 to fit together, mounting grooves 48 adapted to the limiting member 45 are provided on the first component 1 and the second component 2 respectively.

[0068] The mounting slot 48 provides precise positioning space for the limiting member 45, ensuring that the limiting member 45 can be installed more tightly and accurately between component 1 and component 2. When the limiting member 45 is embedded in the mounting slot 48, component 1 and component 2 can achieve a more snug fit under the action of the limiting member 45. During battery pack operation, even under strong vibration or complex external forces, the tight cooperation between the limiting member 45, mounting slot 48, and limiting slot 37 effectively prevents minor misalignment between component 1 and component 2, further improving the stability of the simulated cell structure and making its simulation of the actual cell assembly state more accurate.

[0069] The mounting slot 48 makes the installation process of the limiting component 45 more intuitive and convenient. When assembling the simulated battery cell, the staff only needs to align the limiting component 45 with the mounting slot 48 and insert it to complete the initial installation of the limiting component 45, and then make subsequent fine adjustments, which greatly shortens the assembly time.

[0070] This invention, through the design of a mounting slot 48 adapted to the limiting component 45, allows the simulated battery cell structure to better adapt to limiting components 45 of different specifications. When the limiting component 45 needs to be replaced according to different battery pack or module requirements, only the compatibility between the limiting component 45 and the mounting slot 48 needs to be ensured; no major modifications to the overall structure of component 1 and component 2 are required. This feature enhances the versatility of the simulated battery cell structure. By adjusting the parameters of the limiting component 45, companies can quickly develop simulated battery cell products adapted to different application scenarios, meeting diverse market demands while reducing product development costs and timelines.

[0071] During the maintenance of the simulated battery cell, if the limiting component 45 is damaged and needs to be replaced, the design of the mounting slot 48 simplifies the disassembly and installation of the new limiting component 45. Workers can easily remove the old limiting component from the mounting slot and accurately install the new one, reducing maintenance time and workload. Furthermore, when replacing the limiting component, the positioning function of the mounting slot 48 ensures the positional accuracy of the new limiting component after installation, maintaining the stable performance of the simulated battery cell and reducing the risk of secondary damage to the simulated battery cell due to improper maintenance operations.

[0072] Example 5: This utility model provides a battery pack testing device, see [link to example]. Figure 9 As shown, it includes a battery pack housing for accommodating a simulated battery pack module; the simulated battery pack module includes a plurality of spaced-apart cell assemblies, each cell assembly including an end plate 6, a cell 7 and a simulated cell as described in any of the above embodiments, and a plurality of cell 7 are stacked and fixed between two end plates 6 along their thickness direction, and the simulated cell is arranged between two adjacent stacked cell 7.

[0073] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A simulated battery cell, characterized in that: Includes a simulated battery cell body, the outer contour of which is the same as that of the target battery cell unit; The simulated battery cell body includes component one (1), component two (2), connector (3) and limiting structure (4); The first component (1) and the second component (2) are arranged opposite to each other along the first direction, and the connecting piece (3) passes through the first component (1) and is fixedly connected to the second component (2) along the first direction, so as to realize the detachable connection between the first component (1) and the second component (2); The limiting structure (4) is used to limit the relative displacement of component one (1) and component two (2) in the second direction.

2. The simulated battery cell according to claim 1, characterized in that: The first component (1) is provided with a through hole (11) through which the connector (3) passes, and the second component (2) is provided with a first mounting hole (21) that corresponds to the end of the connector (3).

3. The simulated battery cell according to claim 2, characterized in that: The connector (3) is a screw, and the end of the through hole (11) opposite to the second component (2) is provided with a countersunk hole (111) that is adapted to the head of the screw. The first mounting hole (21) is a threaded hole that is adapted to the end of the screw.

4. The simulated battery cell according to claim 1, characterized in that: The limiting structure (4) includes a first inclined surface (41) disposed on the first component (1) and a second inclined surface (42) disposed on the second component (2) and corresponding to the first inclined surface (41). The first inclined surface (41) is perpendicular to the reference plane. The reference plane is a plane passing through the first reference line and the second reference line. The first reference line is a straight line extending from the geometric center of the simulated cell body in a first direction, and the second reference line is a straight line extending from the geometric center of the simulated cell body in a second direction.

5. The simulated battery cell according to claim 4, characterized in that: The angle between the first inclined plane (41) and the vertical plane is 30°~60°.

6. The simulated battery cell according to claim 1, characterized in that: The limiting structure (4) includes a boss (43) disposed on the first component (1) and a groove (44) disposed on the second component (2) and correspondingly cooperating with the boss (43). The number of the bosses (43) is two, the two bosses (43) are arranged at intervals along the second direction, and the two bosses (43) are respectively arranged on the lower edge of the component (1).

7. The simulated battery cell according to claim 1, characterized in that: The limiting structure (4) includes a limiting member (45), which is arranged between the first component (1) and the second component (2), and the limiting member (45) has limiting portions (46) at both ends. The sides of the first component (1) and the second component (2) are provided with limiting grooves (47) that correspond to and cooperate with the limiting portions (46).

8. The simulated battery cell according to claim 1, characterized in that: The first direction is the height direction of the simulated battery cell body, and the second direction is the thickness direction of the simulated battery cell body.

9. The simulated battery cell according to claim 1, characterized in that: The first component (1) has a second mounting hole (12) on the side surface opposite to the second component (2) for connection with the disassembly tool (5).

10. A battery pack testing device, characterized in that, include: Battery pack housing, used to house the simulated battery pack module; The simulated battery pack module includes several cell assemblies arranged at intervals. Each cell assembly includes an end plate (6), a cell (7), and a simulated cell as described in any one of claims 1 to 9. Multiple cell cells are stacked and fixed between two end plates (6) along their thickness direction. The simulated cell is arranged between two adjacent stacked cell cells (7).

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