Battery cell impact test device, system and method

Abstract

The invention relates to a battery cell impact test device, system and method, a battery cell to be subjected to an impact test is placed on a placement plate, the placement plate is vertically arranged, and the position of the placement plate relative to a base in a first direction is adjustable, so that the position of the battery cell in the first direction is adjustable. In addition, the battery cell can be placed on the placing plate through the fixing assembly, the position of the battery cell relative to the placing plate in the second direction is adjustable, and the fastening degree of the battery cell and the placing plate is adjustable. The impact test of the battery cell is carried out by using the battery cell impact test device provided by the invention, so that the impact test can be carried out on the battery cell by adopting the impacter capable of horizontally emitting. Besides, the battery cell impact test device is additionally provided with the protection box with an upward opening, and when the battery cell has a trend of thermal runaway, the fastening degree of the battery cell and the placement plate can be adjusted through the fixing assembly, so that the battery cell falls into liquid in the protection box from the placement plate, and the strength of the thermal runaway of the battery cell can be controlled.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell impact testing, and in particular to a battery cell impact testing device, system and method. Background Art

[0002] In the field of battery cell performance testing, battery cell impact testing is an important part of evaluating the safety and stability of battery cells when subjected to unexpected impacts. With the rapid development of industries such as electronic equipment and new energy vehicles, the requirements for battery cell safety are becoming increasingly stringent, making the optimization of battery cell impact testing technology the focus of industry attention.

[0003] At present, the probability of thermal runaway (fire) in the battery cell during the impact test is relatively high. In the related technology, when conducting the battery cell impact test, the battery cell is generally placed horizontally on the test bench, and the impactor is used to vertically drop the battery cell. However, from the perspective of the impact power source and the impact direction, it relies on gravity impact as the power source, and the impact direction is limited to the vertical direction. This makes it impossible to apply the horizontally launched impactor to the battery cell impact test, which greatly limits the selection range of the test equipment and the diversity of the test methods. In addition, this method is extremely complicated in adjusting the impact energy, and it is necessary to finely adjust multiple factors such as the mass of the impactor and the drop height, which affects the reliability of the test. Moreover, in the related technology, after the battery cell thermal runaway (fire), its combustion process is relatively violent, and a large amount of toxic gas will be generated at the same time. In addition, the battery cell is severely deformed after combustion, and the appearance data cannot be measured, which affects the collection of the test data, thereby further affecting the reliability of the test. Summary of the invention

[0004] One of the purposes of the present application is to provide a battery cell impact test device for a battery cell impact test, which can place the battery cell to be impact tested on a vertically arranged placement plate, and can adjust the position of the battery cell in the first direction and the position of the battery cell in the second direction, so that a transversely emitted impactor can be used to perform an impact test on the battery cell, and it is convenient to adjust the impact energy, thereby improving the convenience and reliability of the test, and by adding a protection box, the intensity of thermal runaway can be controlled, ensuring the accurate collection of test data, and further improving the reliability of the test; the second purpose of the present application is to provide a battery cell impact test system; the second purpose of the present application is to provide a battery cell impact test method.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a battery cell impact test device, including a base, a placement plate, a fixing assembly and a protection box; The placement plate is installed on the base, and the placement plate is arranged vertically, and the position of the placement plate relative to the base in a first direction is adjustable; The fixing assembly is used to place the battery cell to be subjected to the impact test on the placement plate, and the position of the battery cell relative to the placement plate along the second direction is adjustable, and the degree of fastening between the battery cell and the placement plate is adjustable; The protection box is used to contain liquid, and the opening of the protection box faces upward; When conducting an impact test, the base is placed directly in front of the impact direction of the impactor of the battery cell impact test, and by adjusting the position of the placement plate relative to the base in the first direction and the position of the battery cell relative to the placement plate in the second direction, the expected impact position of the battery cell is made to be the same as the impact direction, wherein the impact direction, the first direction and the second direction are perpendicular to each other; and the protective box is placed below the battery cell.

[0006] Furthermore, the fixing assembly includes an adjusting device and a fixing wire, the fixing wire extends along the second direction, the adjusting device is fixedly connected to the movable end of the fixing wire, and the adjusting device is used to adjust the degree of compression between the fixing wire and the battery cell to adjust the degree of tightness between the battery cell and the mounting plate.

[0007] Further, the regulating device comprises a cylinder and a gas valve, and the cylinder and the gas valve are both mounted on the placement plate; The air cylinder comprises a cylinder body and an air rod, wherein the air rod is fixedly connected to the fixed end of the fixing wire, and the air valve is used to provide power to the air rod to drive the air rod to move relative to the cylinder body to adjust the degree of compression between the fixing wire and the battery core.

[0008] Further, the cylinder includes a fastening block, the fastening block includes a groove, the groove faces the placement plate, the cylinder body is located in the groove, and the fastening block is fixedly connected to the placement plate to install the cylinder to the placement plate.

[0009] Further, the battery cell impact test device comprises a first stopper and a second stopper, the first stopper and the second stopper are respectively fixedly connected to the placement plate, and the second stopper is spaced apart from the first stopper, and the area between the second stopper and the first stopper on the placement plate constitutes a battery cell placement area of ​​the battery cell; The fixed end of the fixing wire is fixed on the first stopper, and the movable end of the fixing wire is connected to the adjusting device after passing through the second stopper.

[0010] Furthermore, the second stopper includes a plurality of semicircular limiting grooves / holes, and the plurality of limiting grooves / holes are arranged along the first direction. The movable end of the fixing wire passes through the limiting grooves / holes and is connected to the adjusting device. The limiting grooves / holes are used to limit the movement of the fixing wire along the first direction.

[0011] Furthermore, the first stopper includes a lower stopper and an upper stopper arranged vertically along the placement plate, the lower stopper is fixedly connected to the placement plate, the upper stopper is detachably connected to the lower stopper, and the fixed end of the fixing wire is fixed between the lower stopper and the upper stopper.

[0012] Furthermore, the number of the fixing wires is at least two, and at least two of the fixing wires are arranged at intervals along the first direction.

[0013] Furthermore, the battery cell impact test device comprises a sliding assembly, the placement plate is mounted on the base via the sliding assembly, and the sliding assembly is used to make the position of the placement plate relative to the base in the first direction adjustable.

[0014] Further, the sliding assembly includes at least one slide rail extending along a first direction, and at least one slider is mounted on the slide rail, and the slider is slidably connected to the slide rail; The slide rail is fixedly connected to the base, and the slider is fixedly connected to the placement plate; or the slide rail is fixedly connected to the placement plate, and the slider is fixedly connected to the base.

[0015] Furthermore, the battery cell impact test device comprises a driving assembly, and the driving assembly is used to drive the placement plate to move along the first direction of the base through the sliding assembly.

[0016] Further, the driving assembly includes a lead screw and a connecting block, the lead screw is rotatably connected to the base, the connecting block is fixedly connected to the placement plate, and a threaded hole matching with the threaded column section of the lead screw is provided on the connecting block, and the threaded column section of the lead screw is connected to the connecting block through the threaded hole; When the lead screw is rotated relative to the base, the lead screw drives the connecting block to move along the first direction, thereby driving the placement plate to move relative to the base along the first direction through the sliding assembly.

[0017] Furthermore, the base includes a top beam and a bottom beam, and the lead screw passes through the top beam and the bottom beam so that the lead screw is rotatably connected to the base.

[0018] To achieve the above-mentioned purpose, in a second aspect, the present application further provides a battery cell impact test system, which comprises an impactor and a battery cell impact test device as described in any one of the first aspects.

[0019] To achieve the above-mentioned purpose, in a second aspect, the present application also provides a battery cell impact test method, which is applied to the battery cell impact test system as described in the second aspect, and the battery cell impact test method comprises: By adjusting the position of the placement plate relative to the base in the first direction and the position of the battery cell relative to the placement plate in the second direction, the expected impact position of the battery cell is the same as the impact direction of the impactor; Placing a protective box below the battery cell; Controlling the impactor to impact the battery cell; During the test, if it is determined that the battery cell has a tendency to thermal runaway, the tightness of the battery cell and the mounting plate is adjusted through a fixing assembly so that the battery cell falls from the mounting plate into the protective box, so that the battery cell is at least partially submerged in the liquid in the protective box.

[0020] Beneficial effects of this application: In the present application, the battery cell to be impact tested is placed on a placement plate, the placement plate is arranged vertically, and the position of the placement plate relative to the base in the first direction is adjustable, so that the position of the battery cell in the first direction is adjustable. In addition, the battery cell can be placed on the placement plate through a fixing assembly, and the position of the battery cell relative to the placement plate along the second direction is adjustable, and the degree of fastening between the battery cell and the placement plate is adjustable. When performing an impact test, the base can be located directly in front of the impactor of the battery cell impact test, and the expected impact position of the battery cell can be made the same as the impact direction of the impactor through position adjustment in the first direction and position adjustment in the second direction, so as to ensure that the impactor can accurately impact the battery cell. In other words, by using the battery cell impact test device of the present application to perform an impact test on the battery cell, a horizontally emitted impactor can be used to perform an impact test on the battery cell, and horizontal impact is more convenient for adjusting the impact energy, which can improve the convenience and reliability of the test. In addition, the battery cell impact test device disclosed in the present invention also adds a protective box with an upward opening, which is filled with liquid that can submerge the battery cell to be impact tested, and the protective box is placed under the battery cell. When the battery cell is found to have a tendency of thermal runaway, the tightness of the battery cell and the mounting plate can be adjusted through the fixing assembly, so that the battery cell falls from the mounting plate into the liquid in the protective box, thereby controlling the intensity of the thermal runaway of the battery cell, greatly reducing the generation of toxic gases and deformation of the shell caused by intense combustion, reducing pollution to the test environment, and also protecting the health of the operator. It also ensures the relative integrity of the battery cell after the test, provides the possibility for subsequent data analysis, ensures the reliable collection of test data, and improves the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a battery cell impact test system provided in an embodiment of the present application is shown; Figure 2 A schematic diagram of a battery cell impact test device provided in an embodiment of the present application is shown (a protection box is not shown in the figure); Figure 3Another schematic diagram of a battery cell impact test device provided in an embodiment of the present application is shown; Figure 4 A schematic diagram of a cylinder provided in an embodiment of the present application is shown; Figure 5 A schematic diagram of a gas valve provided in an embodiment of the present application is shown; Figure 6 A schematic diagram showing a second stopper provided in an embodiment of the present application is shown; Figure 7 Another schematic diagram showing a second stopper provided in an embodiment of the present application; Figure 8 A schematic diagram showing a first stopper provided in an embodiment of the present application is shown; Fig. 9 Another schematic diagram of a first stopper provided in an embodiment of the present application is shown; Fig.10 A schematic diagram of a base provided in an embodiment of the present application is shown (including a sliding assembly in the figure); Fig.11 A schematic diagram of a lead screw provided in an embodiment of the present application is shown; Fig.12 A schematic diagram of a placement plate provided in an embodiment of the present application is shown (including a connection block in the figure); Fig.13 Another schematic diagram of a placement plate provided in an embodiment of the present application is shown.

[0022] in: 1. Battery cell impact test device; 11. Base; 111. L-shaped iron frame; 1111. First column; 1112. Second column; 1113. Top beam; 1114. Bottom beam; 112. Reinforcement strip; 12. Placement plate; 13. Sliding assembly; 131. Slide rail; 132. Sliding block; 14. Fixing assembly; 141. Fixing wire; 142. Adjusting device; 1421. Cylinder; 1421a. Cylinder body; 1421b, gas rod; 1421c, fastening block; 1422, gas valve; 15, protection box; 16, first block; 161, lower block; 162, upper block; 17, second block; 171, limit groove; 18, drive assembly; 181, lead screw; 1811, threaded column section; 1812, hexagonal iron block; 1813, cylinder; 182, connecting block; 2, impactor; 3, battery cell; 110, first through hole; 120, second through hole; 130, third through hole; 140, fourth through hole; 150, fifth through hole; 160, sixth through hole; 170, seventh through hole; 210, first threaded hole; 220, second threaded hole; 230, third threaded hole; 240, fourth threaded hole; 310, vent hole; 320, air inlet hole; 330, air outlet hole; 410, matching hole; 510. Mounting hole. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0025] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0026] To facilitate understanding of the embodiments of the present application, further explanation will be given below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present application.

[0027] refer to Figure 1 and Figure 2 As shown, this embodiment provides a cell impact test device 1 for a cell impact test, a cell impact test system including an impactor 2 and the cell impact test device 1, and a cell impact test method applied to the cell impact test system. Figure 1 As shown, the battery cell impact test device 1 may include a base 11 , a placement plate 12 , a fixing assembly 14 and a protection box 15 .

[0028] The placement plate 12 is mounted on the base 11, and the placement plate 12 is arranged vertically, so that after the battery cell 3 to be subjected to the impact test is placed on the placement plate 12, the battery cell 3 can be subjected to the impact test in the horizontal direction. In addition, after the placement plate 12 is mounted on the base 11, the position of the placement plate 12 relative to the base 11 in the first direction is adjustable, so that the position of the battery cell 3 in the first direction is adjustable, and it is better to ensure that the expected impact position of the battery cell 3 in the first direction is the same as the impact direction of the impactor 2.

[0029] Among them, the fixing assembly 14 is used to place the battery cell 3 to be subjected to the impact test on the placement plate 12, and the position of the battery cell 3 relative to the placement plate 12 along the second direction is adjustable, and the degree of fastening between the battery cell 3 and the placement plate 12 is adjustable. In other words, after the battery cell 3 is placed on the placement plate 12 by the fixing assembly 14, the position of the battery cell 3 on the placement plate 12 along the second direction is adjustable, so that the expected impact position of the battery cell 3 in the second direction can be better ensured to be the same as the impact direction of the impactor 2. In addition, since the degree of fastening between the battery cell 3 and the placement plate 12 is adjustable, the battery cell 3 can be better removed from the placement plate 12.

[0030] Among them, the protection box 15 is used to contain liquid, and the opening of the protection box 15 faces upward. Moreover, when performing an impact test, the protection box 15 is placed below the battery cell 3. With such an arrangement, during the impact test, if it is determined that the battery cell 3 has a tendency of thermal runaway, the fastening degree between the battery cell 3 and the placement plate 12 can be adjusted through the fixing assembly 14, so that the battery cell 3 falls from the placement plate 12 into the protection box 15. After the battery cell 3 falls into the protection box 15, the liquid in the protection box 15 can submerge at least part of the battery cell 3 to control thermal runaway. Among them, the liquid in the protection box 15 can be water, or other liquids that can control thermal runaway, and there is no limitation on this. In addition, in some embodiments, the liquid contained in the protection box 15 can submerge the entire battery cell 3 to better control thermal runaway.

[0031] When conducting an impact test, the base 11 is placed in front of the impact direction of the impactor 2 of the battery cell impact test, and by adjusting the position of the placement plate 12 relative to the base 11 in the first direction and the position of the battery cell 3 relative to the placement plate 12 in the second direction, the expected impact position of the battery cell 3 is the same as the impact direction, thereby ensuring that the impactor 2 can accurately impact the battery cell 3. Among them, the impact direction, the first direction and the second direction are perpendicular to each other. It should be noted that the specific directions of the first direction, the second direction and the impact direction are not limited, as long as the impact direction is ensured to be horizontal. For example, the impact direction is recorded as the front-to-back direction, the first direction is the up-and-down direction (vertical), and the second direction is the left-to-right direction. For another example, the impact direction is recorded as the front-to-back direction, the first direction is the left-to-right direction, and the second direction is the up-and-down direction.

[0032] In this embodiment, the placement plate 12 is arranged vertically, and the placement plate 12 moves in the first direction relative to the base 11, which means that the first direction position of the battery cell 3 can be accurately adjusted according to the actual test requirements. At the same time, after the battery cell 3 is placed on the placement plate 12 through the fixing assembly 14, the position of the battery cell 3 in the second direction of the placement plate can also be conveniently adjusted. When performing an impact test, the operator can easily place the base 11 in front of the impactor 2 of the battery cell impact test, and then adjust the first direction and the second direction to make the expected impact position of the battery cell 3 the same as the impact direction of the impactor 2. This feature allows the impactor 2 to accurately impact the predetermined position of the battery cell 3, avoiding the problem of inaccurate or unreliable test results caused by the deviation of the impact position. In the actual development and quality inspection process of the battery cell 3, accurate impact test results can provide reliable data support for the safety assessment and performance optimization of the battery cell 3, and help R&D personnel to have a deep understanding of the internal structure changes and performance performance of the battery cell 3 when it is impacted, so as to improve the design and manufacturing process of the battery cell 3 in a targeted manner and improve the quality and safety of the battery cell 3.

[0033] In addition, through the application of the battery cell impact test device 1 of this embodiment, the limitations of the traditional vertical impact test are broken, so that the horizontally launched impactor 2, which was originally unable to be used due to the impact direction limitation, can be used for the battery cell impact test. The horizontally launched impactor 2 has obvious advantages in the adjustment of impact energy, which is more convenient to adjust the impact energy, so that impact tests of different energy levels can be carried out more efficiently during the test, without spending a lot of time to adjust the impact height and the quality of the impactor 2 as in the traditional vertical impact test. This series of advantages makes the entire battery cell impact test process smoother and more efficient, and can obtain more accurate test data in a shorter time, improve scientific research and production efficiency, and reduce test costs.

[0034] That is, in this embodiment, the battery cell 3 is placed by the battery cell impact test device 1, and the horizontal impactor 2 can be used to perform an impact test on the battery cell 3. Horizontal impact is more convenient for adjusting the impact energy, which can improve the convenience and efficiency of the test.

[0035] It should also be noted that after the battery cell 3 has thermal runaway, its combustion process is relatively violent, and a large amount of toxic gas will be generated. After the combustion, the battery cell 3 is severely deformed, and the shape data cannot be measured. This embodiment adds a protective box 15, and a liquid (such as water) that can control thermal runaway is contained in the protective box 15, and when the battery cell impact test is performed, the protective box 15 is placed under the battery cell 3. Then the impactor 2 is controlled to impact the battery cell 3. During the test, if it is determined that the battery cell 3 has a thermal runaway trend, the fastening degree between the battery cell 3 and the placement plate 12 can be adjusted through the fixing component 14, so that the battery cell 3 falls from the placement plate 12 into the protective box 15. Since the liquid in the protective box 15 can submerge at least part of the battery cell 3, the intensity of the thermal runaway of the battery cell 3 can be controlled, the generation of toxic gases and the deformation of the shell caused by violent combustion are greatly reduced, and the pollution to the test environment is reduced. At the same time, the health of the operator is also protected, and the relative integrity of the battery cell 3 after the test is guaranteed, which provides a possibility for subsequent data analysis and improves the effectiveness of the test.

[0036] In an exemplary embodiment, reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a battery cell impact test system and a battery cell impact test device 1 thereof, as well as a battery cell impact test method applied to the battery cell impact test system are provided. In this embodiment, the fixing assembly 14 of the battery cell impact test device 1 may include an adjustment device 142 and a fixing wire 141, and the battery cell 3 to be subjected to the impact test can be pressed and placed on the placement plate 12 by the fixing wire 141. The fixing wire 141 may be a steel wire rope or other filamentary structure, which is not limited to this. The number of the fixing wires 141 may be one, two, or more, which is not limited to this. When the number of the fixing wires 141 is at least two, the at least two fixing wires 141 are arranged at intervals along the first direction to better fix the battery cell 3. In addition, the fixing wire 141 extends along the second direction, based on which, when the battery cell 3 moves laterally relative to the placement plate 12, it can still be ensured that the fixing wire 141 presses the battery cell 3 and places it on the placement plate 12, that is, the above arrangement makes the battery cell 3 adjustable in the second direction of the placement plate 12.

[0037] The adjusting device 142 is fixedly connected to the movable end of the fixing wire 141, and the adjusting device 142 is used to adjust the degree of compression between the fixing wire 141 and the battery cell 3, so as to adjust the degree of fastening between the battery cell 3 and the mounting plate 12. Based on this, the battery cell impact test device 1 can adapt to battery cells 3 of different sizes and models, improve the scope of application, and can adjust the degree of compression between the fixing wire 141 and the battery cell 3 according to needs, so as to better meet the needs of the impact test.

[0038] For example, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the fixing wire 141 can be a steel wire rope, and the adjusting device 142 includes a cylinder 1421 and a gas valve 1422, and the cylinder 1421 and the gas valve 1422 are both installed on the placement plate 12. The cylinder 1421 includes a cylinder body 1421a and a gas rod 1421b, and the gas rod 1421b is fixedly connected to the fixed end of the fixing wire 141. The gas valve 1422 is used to provide power to the gas rod 1421b to drive the gas rod 1421b to move relative to the cylinder body 1421a to adjust the degree of compression between the fixing wire 141 and the battery cell 3.

[0039] Among them, the movable end of the fixing wire 141 and the gas rod 1421b can be connected by bonding, welding or by other structures to assist in fixing, and there is no limitation on this. For example, a metal plate with bolt holes is welded or processed at the end of the gas rod 1421b, the steel wire rope is placed on the metal plate, and then a suitable pressure block is covered on the steel wire rope, and bolts are passed through the holes in the pressure block and the metal plate, and the bolts are tightened so that the pressure block tightly presses the steel wire rope, thereby achieving fixation. For another example, a wedge-shaped sleeve is used, and one end of the steel wire rope is inserted into the wedge-shaped sleeve, and the end of the gas rod 1421b is designed to be compatible with the wedge-shaped sleeve. When the gas rod 1421b is inserted into the wedge-shaped sleeve, the steel wire rope will be tightly clamped by the wedge-shaped structure to achieve fixation.

[0040] When performing a cell impact test, first place the base 11 in front of the impactor 2 of the cell impact test. Then, adjust the first direction position of the placement plate 12 through the sliding assembly 13, and adjust the second direction position of the cell 3 in the cell 3 placement area, so that the expected impact position of the cell 3 is the same as the impact direction of the impactor 2. Next, according to the size and model of the cell 3, use the gas valve 1422 to control the movement of the gas rod 1421b of the cylinder 1421, adjust the degree of compression between the fixing wire 141 and the cell 3, and ensure that the cell 3 remains stable during the test. Then, the cell 3 can be impacted to complete the impact test.

[0041] In this embodiment, an adjusting device 142 composed of a cylinder 1421 and an air valve 1422 is used, and the operation process is simple and convenient. By simply controlling the air valve 1422, the air rod 1421b can be easily driven to move, thereby adjusting the degree of compression of the fixed wire 141. Compared with the traditional manual adjustment method, it not only saves manpower and time, but also can more accurately control the degree of compression, thereby improving the test efficiency and quality. In addition, this embodiment can ensure that the battery cell 3 is firmly fixed on the mounting plate 12 by accurately adjusting the degree of compression of the fixed wire 141 through the adjusting device 142, thereby avoiding shaking or displacement during the impact process. This helps to improve the stability and repeatability of the test, make the test results more convincing, and provide reliable data support for the research and development and quality evaluation of the battery cell 3.

[0042] In addition, when conducting the impact test on the battery cell 3, after the impactor 2 is controlled to hit the battery cell 3, if the battery cell 3 has no tendency of thermal runaway (fire), the battery cell 3 can be held by hand (the battery cell 3 can also be fixed by tools), and then the gas valve 1422 is closed to remove the battery cell 3. If the battery cell 3 has a tendency of thermal runaway (fire), the gas valve 1422 can be closed. After the gas valve 1422 is closed, the fixing wire 141 loosens, and the battery cell 3 can fall into the protective box 15 below to control the thermal runaway. After the battery cell 3 has no obvious reaction, the battery cell 3 can be taken out. After taking out the battery cell 3, the intrusion amount of the battery cell 3 is measured to determine the relationship between the thermal runaway of the battery cell 3 and the intrusion amount, providing important supporting data for the subsequent protection design of the battery pack of the whole vehicle. At this point, the horizontal impact test of the battery cell 3 is completed.

[0043] It should be noted that, in addition to the above-mentioned devices, the adjusting device 142 may also be other devices that can adjust the degree of compression between the fixed wire 141 and the battery cell 3, and this is not limited. For example, the adjusting device 142 may be an electric push rod or a spiral adjustment mechanism. An electric push rod is an electric drive device that converts the rotational motion of a motor into a linear reciprocating motion of a push rod. The push rod end of the electric push rod is connected to the movable end of the fixed wire 141, and the degree of compression between the fixed wire 141 and the battery cell 3 can be adjusted by controlling the extension and retraction of the electric push rod. The spiral adjustment mechanism is usually composed of a screw, a nut and a handle. One end of the screw is connected to the movable end of the fixed wire 141, and the nut is mounted on the mounting plate 12. By rotating the handle, the screw moves linearly in the nut, thereby adjusting the degree of compression between the fixed wire 141 and the battery cell 3.

[0044] The cylinder 1421 may further include a fastening block 1421c. The fastening block 1421c may be a concave block, that is, the fastening block 1421c includes a groove, and the groove may be adapted to the cylinder body 1421a of the cylinder 1421. When the cylinder 1421 is mounted to the mounting plate 12 via the fastening block 1421c, the groove faces the mounting plate 12, the cylinder body 1421a of the cylinder 1421 is located in the groove, and the fastening block 1421c is fixedly connected to the mounting plate 12 to mount the cylinder 1421 to the mounting plate 12.

[0045] The fastening block 1421c and the placement plate 12 may be connected by snap fastening, adhesive connection, or screws or other fasteners 1513, which are not limited. For example, the fastening block 1421c may be provided with at least one through hole, and the placement plate 12 may be provided with a through hole that matches the through hole, and the fastening block 1421c and the placement plate 12 may be fixedly connected by inserting fasteners 1513 such as screws or other fasteners into the two through holes, thereby installing the cylinder 1421 on the placement plate 12.

[0046] During installation, the cylinder body 1421a of the cylinder 1421 can be firmly placed in the groove, effectively preventing the cylinder 1421 from shaking or shifting during operation, and ensuring the stability of the operation of the cylinder 1421. This adaptation design provides a reliable support structure for the cylinder 1421, so that the cylinder 1421 can more accurately drive the gas rod 1421b to move, and then accurately adjust the degree of compression between the fixing wire 141 and the battery cell 3, ensuring the reliability of the fixation of the battery cell 3 during the test.

[0047] Among them, reference Figure 1 , Figure 2 as well as Figures 6 to 9 As shown, the battery cell impact test device 1 may also include a first stopper 16 and a second stopper 17. The first stopper 16 and the second stopper 17 are respectively fixedly connected to the placement plate 12, and the second stopper 17 is spaced apart from the first stopper 16, and the area between the second stopper 17 and the first stopper 16 on the placement plate 12 constitutes the battery cell 3 placement area of ​​the battery cell 3. That is, after the battery cell 3 is placed on the placement plate 12, the battery cell 3 is located between the second stopper 17 and the first stopper 16. By providing the first stopper 16 and the second stopper 17, it is possible to prevent impurities from splashing to both sides of the battery cell 3 during the impact test, and to prevent impurities from causing damage to surrounding equipment and personnel, thereby significantly improving the safety of the test. At the same time, this design also ensures the relative cleanliness of the test environment and reduces the interference of impurities on the test results.

[0048] The fixed end of the fixing wire 141 is fixed to the first stopper 16, and the movable end of the fixing wire 141 passes through the second stopper 17 and is connected to the adjusting device 142. That is, by providing the first stopper 16 and the second stopper 17, a gap can be provided between the fixing wire 141 and the placement plate 12, so that the battery cell 3 can be fixed between the fixing wire 141 and the placement plate 12.

[0049] Wherein, the first stopper 16 includes a lower stopper 161 and an upper stopper 162 arranged vertically along the placement plate 12. The lower stopper 161 is fixedly connected to the placement plate 12. The fixed connection method between the lower stopper 161 and the placement plate 12 can refer to the connection method between the fastening block 1421c and the placement plate 12, which will not be described in detail. The upper stopper 162 is detachably connected to the lower stopper 161. The upper stopper 162 and the lower stopper 161 can be detachably connected by a buckle, or by fasteners 1513 such as screws, or by other methods, which are not limited to this. The fixed end of the fixed wire 141 is fixed between the lower stopper 161 and the upper stopper 162, thereby realizing reliable fixation of the fixed end of the fixed wire 141 to prevent it from loosening during the test, and also facilitating replacement or adjustment of the fixed wire 141. When the fixing wire 141 needs to be replaced, it is easy to operate by simply removing the upper stopper 162 without replacing the entire first stopper 16 , thereby reducing maintenance costs and time.

[0050] In addition, in this embodiment, the second stopper 17 may include a plurality of semicircular limiting grooves / holes, that is, the second stopper 17 may include a plurality of semicircular limiting grooves 171, or a plurality of semicircular limiting holes. The plurality of limiting grooves / holes are arranged along the first direction, and the movable end of the fixing wire 141 passes through the limiting grooves / holes and is connected to the adjusting device 142, and the limiting grooves / holes are used to limit the movement of the fixing wire 141 along the first direction.

[0051] When the second stopper 17 includes a plurality of semicircular limiting grooves 171, the limiting grooves 171 are located on the side of the second stopper 17 away from the placement plate 12. When the second stopper 17 includes a plurality of semicircular limiting holes, the limiting holes are through holes and are located on the side of the second stopper 17 that is farther from the placement plate 12. The specific position can be determined according to the connection position between the lower stopper 161 and the upper stopper 162.

[0052] When adjusting the degree of compression between the fixing wire 141 and the battery cell 3, the limitation of the limiting groove / hole ensures that the movement direction of the fixing wire 141 is accurate, and avoids the deviation of the fixing wire 141 in the first direction, thereby improving the accuracy and stability of the adjustment. At the same time, the specific position of the limiting groove 171 / hole is determined according to the connection position between the lower block 161 and the upper block 162, further optimizing the movement path of the fixing wire 141, making the entire adjustment process smoother and more reliable. Moreover, the semicircular limiting groove / hole can better prevent the fixing wire 141 from being damaged due to wear during the adjustment process, better improve the stability of the fixing wire 141, and extend the service life of the fixing wire 141.

[0053] In an exemplary embodiment, reference Figure 1 , Figure 2 and Fig.10 As shown, a battery cell impact test system and a battery cell impact test device 1 thereof, as well as a battery cell impact test method applied to the battery cell impact test system are provided. In this embodiment, the battery cell impact test device 1 may include a sliding component 13, and the placement plate 12 is installed on the base 11 through the sliding component 13, and the sliding component 13 is used to make the position of the placement plate 12 relative to the base 11 in the first direction adjustable.

[0054] The sliding assembly 13 may include at least one sliding rail 131 extending along the first direction, and at least one sliding block 132 is installed on the sliding rail 131 . The sliding block 132 is slidably connected to the sliding rail 131 .

[0055] The slide rail 131 is fixedly connected to the base 11, and the slider 132 is fixedly connected to the placement plate 12; or the slide rail 131 is fixedly connected to the placement plate 12, and the slider 132 is fixedly connected to the base 11. Based on this, the placement plate 12 can move relative to the base 11 along the first direction through the sliding assembly 13.

[0056] For example, the base 11 may include two columns, which are respectively denoted as a first column 1111 and a second column 1112, and the two columns are arranged at intervals. A slide rail 131 extending along the column is arranged on each column, and the slide rail 131 is fixedly connected to the column. Each slide rail 131 is equipped with two sliders 132, and the two sliders 132 are arranged at intervals. The specific positions of the sliders 132 can be set according to actual conditions and are not limited to this. The above-mentioned sliders 132 are fixedly connected to the placement plate 12, respectively. Based on this, the placement plate 12 can slide along the first direction of the slide rail 131 through the slider 132 and move relative to the base 11 along the first direction.

[0057] It should be noted that the specific positions and quantities of the slide rails 131 and the sliders 132 configured for each slide rail 131 can be set according to actual needs and are not limited thereto.

[0058] In addition, refer to Figure 1 , Figure 2 as well as Fig.11 and Fig.12 As shown, in this embodiment, the battery cell impact test device 1 may further include a driving assembly 18. The driving assembly 18 may be used to drive the placement plate 12 to move relative to the base 11 along a first direction through the sliding assembly 13. The driving assembly 18 may include a lead screw 181 and a connecting block 182, wherein the lead screw 181 is rotatably connected to the base 11, and the connecting block 182 is fixedly connected to the placement plate 12. The fixed connection method may refer to the connection method between the fastening block 1421c and the placement plate 12, which will not be described in detail here.

[0059] The connection block 182 is provided with a threaded hole that matches the threaded column section 1811 of the lead screw 181, and the threaded column section 1811 of the lead screw 181 is connected to the connection block 182 through the threaded hole. Based on this, when the lead screw 181 is rotated relative to the base 11, the lead screw 181 drives the connection block 182 to move in the first direction, and since the connection block 182 is fixedly connected to the placement plate 12, the placement plate 12 is driven to move in the first direction relative to the base 11 through the sliding assembly 13.

[0060] The base 11 may include a top beam 1113 and a bottom beam 1114 , and the lead screw 181 passes through the top beam 1113 and the bottom beam 1114 , so that the lead screw 181 is rotatably connected to the base 11 .

[0061] For example, the top of the lead screw 181 is a columnar hexagonal iron block 1812, the bottom of the lead screw 181 is a cylinder 1813, and the threaded column section 1811 is between the hexagonal iron block 1812 and the cylinder 1813. The top beam 1113 is provided with a through hole matching the hexagonal iron block 1812 for accommodating the hexagonal iron block 1812. The bottom beam 1114 is provided with a through hole matching the cylinder 1813 for accommodating the cylinder 1813. This design ensures the flexibility of the lead screw 181 in rotation and ensures its stable installation on the base 11. When it is necessary to adjust the first direction position of the placement plate 12, the relevant personnel can rotate the screw 181 through the hexagonal iron block 1812, and the screw 181 can rotate relative to the base 11. When the threaded column section 1811 of the screw 181 rotates with the screw 181, it can drive the connecting block 182 to move in the first direction. Since the connecting block 182 is fixedly connected to the placement plate 12, and the placement plate 12 is connected to the base 11 through the sliding assembly 13, the first direction movement of the connecting block 182 can drive the placement plate 12 to move in the first direction relative to the base 11, thereby realizing precise adjustment of the first direction position of the battery cell 3 placed on the placement plate 12.

[0062] The drive assembly 18 is convenient for operators to use common tools (such as wrenches) for rotation operations. Compared with some complex adjustment mechanisms, operators can easily adjust the first direction position of the placement plate 12 without the help of special tools or complicated operation steps. This convenient operation method not only improves work efficiency and reduces the difficulty of operation, but also reduces the problem of inaccurate adjustment caused by operating errors. In addition, the lead screw 181 and the base 11 are rotatably connected through the cooperation of the top beam 1113 and the bottom beam 1114. This connection method provides stable support for the lead screw 181 and reduces the shaking and deviation of the lead screw 181 during rotation. At the same time, the multiple reliable fixed connection methods of the connecting block 182 and the placement plate 12, as well as the stable guiding effect of the sliding assembly 13, ensure that the placement plate 12 can move smoothly in the first direction during the adjustment process without problems such as jamming or displacement deviation. The structural design of the entire device is reasonable, with high stability and reliability, and can meet the needs of long-term frequent use.

[0063] It should be noted that the drive assembly 18 may be other structures in addition to the above structure, and this is not limited. For example, the drive assembly 18 may be an electric push rod mechanism, including a motor, a reduction gear, a screw, a nut, a push rod, and other parts. The push rod may be fixedly connected to the placement plate 12, the motor drives the screw to rotate through the reduction gear, and the nut moves linearly on the screw, thereby pushing the push rod to extend or retract, and then driving the placement plate 12 to move in the first direction.

[0064] It should be noted that different application scenarios have different requirements for the position of the battery cell 3. In this embodiment, the first direction position of the placement plate 12 can be adjusted by the cooperation of the sliding component 13 and the driving component 18, thereby adjusting the first direction position of the battery cell 3 on the placement plate 12 to ensure that the battery cell 3 is in the best position and improve the accuracy and reliability of the test results. Secondly, the cooperation of the driving component 18 and the sliding component 13 of this embodiment can improve the convenience and flexibility of adjusting the first direction position of the battery cell 3. The operator can easily adjust the first direction position of the battery cell 3 with the help of the driving component 18, without complicated manual operation or additional tools, reducing the operation steps and time cost.

[0065] In an exemplary embodiment, reference Figures 1 to 13 As shown, a telecommunication impact test system and a cell impact test device 1 thereof, as well as a cell impact test method applied to the cell impact test system are provided. In this embodiment, the cell impact test device 1 may include a base 11, a placement plate 12, a sliding assembly 13, a fixing wire 141, an adjustment device 142, and a driving assembly 18, etc. The fixing wire 141 may be a steel wire rope.

[0066] The base 11 may include a hollow L-shaped iron frame 111, and reinforcement bars 112 are welded at both ends of the L-shaped iron frame 111, which greatly enhances the structural strength of the base 11 and enables it to withstand various external forces during the test. The L-shaped iron frame 111 may include a top beam 1113, a bottom beam 1114, and two columns located between the top beam 1113 and the bottom beam 1114, which are respectively recorded as a first column 1111 and a second column 1112.

[0067] The sliding assembly 13 may include a slide rail 131 and a slider 132. A slide rail 131 is welded to the front of the first column 1111 and the second column 1112 (the side away from the reinforcing bar 112), respectively, and two sliders 132 are arranged on each slide rail 131. In addition, the placement plate 12 is located in front of the base 11, and the placement plate 12 is provided with four first through holes 110, and each slider 132 is provided with a mounting hole 510, and the four mounting holes 510 of the four sliders 132 correspond to the four first through holes 110 on the placement plate 12, respectively, so that the slider 132 is fixedly connected to the placement plate 12.

[0068] Among them, the adjusting device 142 may include a cylinder 1421 and an air valve 1422. The battery cell impact test device 1 may also include a first stopper 16 and a second stopper 17. Two second through holes 120 may also be provided on the placement plate 12 for installing the first stopper 16 in front of the placement plate 12. Two third through holes 130 may also be provided on the placement plate 12 for installing the second stopper 17 in front of the placement plate 12. Two fourth through holes 140 are provided on the placement plate 12 for installing the fastening block 1421c. A groove is provided on the fastening block 1421c, and a matching hole 410 is respectively provided on both sides of the groove of the fastening block 1421c, and the matching hole 410 cooperates with the above-mentioned fourth through hole 140 to achieve a fixed connection between the fastening block 1421c and the placement plate 12. The groove faces the placement plate 12, and the cylinder body 1421a (the cylinder 1421 body) of the cylinder 1421 is located in the groove, and the cylinder body 1421a is arranged vertically. Based on this, when the fastening block 1421c is fixedly connected to the placement plate 12, the cylinder 1421 can be fixed on the placement plate 12.

[0069] Among them, two vents 310 are provided on the cylinder body 1421a. When the two vents 310 are respectively inlet and outlet, the gas rod 1421b is extended or tightened. The gas valve 1422 can be a pneumatic control valve, which is provided with an air inlet 320 and two air outlets 330. The two air outlets 330 are respectively connected to the two vents 310 on the cylinder body 1421a in a one-to-one correspondence. Based on this, the extension or tightening of the gas rod 1421b can be controlled by the gas valve 1422.

[0070] The first stopper 16 may include a lower stopper 161 and an upper stopper 162. The lower stopper 161 may be a square iron block, the thickness and length of which are substantially the same as those of the second stopper 17, and a first threaded hole 210 is opened at both ends and in the middle, and a second threaded hole 220 is opened at both ends of the back side, the second threaded hole 220 matches the second through hole 120 on the placement plate 12, and the lower stopper 161 is fixedly connected to the placement plate 12 through the second threaded hole 220 and the second through hole 120. The upper stopper 162 may be a square iron block, the length and width of which may be substantially the same as those of the lower stopper 161, and the thickness is thinner than that of the lower stopper, and a seventh through hole 170 is opened at both ends and in the middle, the distribution and size of which correspond to the first threaded hole 210, and the upper stopper 162 is connected to the lower stopper 161 through the first threaded hole 210 and the seventh through hole 170.

[0071] Among them, the second stop block 17 can be a square iron block, and a plurality of semicircular limit grooves 171 are opened on its front side (the side facing away from the placement plate 12), and two third threaded holes 230 are opened on the back side. The third threaded holes 230 match the third through holes 130 on the placement plate 12, and the second stop block 17 is fixedly connected to the placement plate 12 through the third threaded holes 230 and the third through holes 130.

[0072] The driving assembly 18 may include a lead screw 181 and a connecting block 182. The top of the lead screw 181 is a hexagonal iron block 1812, the bottom is a smooth cylinder 1813, and a threaded column section 1811 is between the hexagonal iron block 1812 and the cylinder 1813. The connecting block 182 is arranged on the back side of the placement plate 12 (i.e., the side of the placement plate 12 facing the base 11). The connecting block 182 and the placement plate 12 can be welded or fixedly connected in other ways, which is not limited. A fourth threaded hole 240 may be provided on the connecting block 182 for threaded connection with the threaded column section 1811 of the lead screw 181. The connecting block 182 may be a square iron block, which can not only achieve connection with the lead screw 181, but also play a load-bearing effect on the placement plate 12. The top beam 1113 of the L-shaped iron frame 111 is provided with a fifth through hole 150 matching the size of the hexagonal iron block 1812, and the bottom beam 1114 is provided with a sixth through hole 160 matching the size of the cylinder 1813. The lead screw 181 is installed under the tower, and the hexagonal iron block 1812 is located in the fifth through hole 150, the threaded column section 1811 is located in the fourth threaded hole 240, and the cylinder 1813 is located in the sixth through hole 160.

[0073] When conducting the impact test on the battery cell 3, place the horizontal launch impactor 2 in front of the battery cell impact test device 1 which is precisely placed to ensure that the relative position of the battery cell impact test device 1 and the impactor 2 is accurate, laying the foundation for the accuracy of subsequent tests. Place the battery cell 3 tightly against the placement plate 12, and adjust the left and right position (i.e., the position in the second direction) and the up and down position (the position in the first direction) of the battery cell 3 so that the expected impact position pre-set on the battery cell 3 is in the same vertical plane as the impact direction of the impactor 2. Subsequently, place the steel wire rope on the outside of the battery cell 3, and at this time, the battery cell 3 is located between the placement plate 12 and the steel wire rope, ready for the subsequent fixing operation.

[0074] After adjusting the second direction position of the battery cell 3, the air valve 1422 can be opened for ventilation. At this time, the air rod 1421b of the cylinder 1421 contracts under the action of air pressure, thereby tightening the wire rope to firmly press the battery cell 3 onto the mounting plate 12 to ensure that the battery cell 3 will not be displaced during the test.

[0075] In this embodiment, for the position adjustment in the first direction, the operator can use a tool such as a wrench to rotate the screw 181 through the hexagonal iron block 1812. The rotation of the screw 181 drives the connecting block 182 and the mounting plate 12 connected thereto to move up and down. Through precise adjustment, until the expected impact position on the battery cell 3 and the impact direction of the impactor 2 are in the same position in the second direction, the precise positioning of the battery cell 3 in the first direction is completed.

[0076] Before impacting, place the protection box 15 (which can be a metal water tank) directly below the battery cell 3, and inject an appropriate amount of water into the protection box 15 to ensure that the injected water can completely submerge the battery cell 3. After completing the above preparations, start the impactor 2 and perform an impact test on the battery cell 3. After the impactor 2 hits the battery cell 3, the state of the battery cell 3 can be observed. If the battery cell 3 has no tendency of thermal runaway (fire), the operator can manually hold the battery cell 3, then close the gas valve 1422, and safely remove the battery cell 3. If the battery cell 3 has a tendency of thermal runaway (fire), the gas valve 1422 can be closed immediately. At this time, the gas rod 1421b no longer tightens the wire rope, and the battery cell 3 will fall into the protection box 15 below due to loss of restraint. The water in the protection box 15 can effectively control the intensity of thermal runaway. After the battery cell 3 has no obvious reaction, it is taken out of the protection box 15, and the intrusion amount of the battery cell 3 is measured. By analyzing the relationship between the intrusion amount and the thermal runaway of the battery cell 3, important supporting data is provided for the subsequent protection design of the battery pack of the whole vehicle, and the impact test of the entire battery cell 3 is completed.

[0077] In this embodiment, a horizontally-launched impactor 2 is used to perform an impact test on the battery cell 3. Compared with the traditional vertical impact method, it can more accurately simulate the horizontal external force impact that the battery cell 3 may suffer in the actual use scenario, such as the horizontal impact on the battery cell 3 in the battery pack due to collision, bumps, etc. during the driving of the vehicle. This simulation close to the actual working conditions makes the test results more realistic and guiding, provides a more reliable data basis for the protection design of the battery pack of the whole vehicle, and helps to improve the safety and stability of the battery pack in the actual use environment. Moreover, the characteristic of horizontal impact that facilitates energy regulation enables testers to flexibly set the impact energy according to the characteristics of different battery cells 3 and test requirements, carry out diversified tests, and conduct in-depth research on the performance of the battery cell 3 under different impact energies, so as to promote the comprehensiveness and depth of the research on the safety performance of the battery cell 3.

[0078] In addition, through the battery cell impact test device 1 of this embodiment, during the test preparation stage, the installation and position adjustment of the battery cell 3 are more intuitive and easy to operate. The staff can clearly determine the expected impact position of the battery cell 3 and ensure that it is in the same vertical plane as the impact direction, thereby improving the accuracy and efficiency of the test preparation.

[0079] This embodiment adds a protection box 15. When the battery cell 3 shows a trend of thermal runaway, the battery cell impact test device 1 is controlled to make the battery cell 3 fall into the water in the protection box 15. The water can quickly absorb a large amount of heat released during the thermal runaway of the battery cell 3, reduce the temperature of the battery cell 3, and effectively inhibit the further development of thermal runaway. It can also absorb and dilute the toxic gases generated by the thermal runaway to a certain extent, reducing the emission of toxic gases into the test environment. This not only improves the safety of the test environment, reduces the potential harm to the health of the test personnel, but also helps to reduce the pollution to the surrounding environment. In addition, the violent combustion of the battery cell 3 during thermal runaway will cause its shell to be severely deformed, which will bring difficulties to the subsequent data analysis, such as the inability to accurately measure the external dimensions and internal structure changes of the battery cell 3. The setting of the protection box 15 can buffer the intensity of thermal runaway, slow down the burning speed, and reduce the degree of deformation of the battery cell 3 during thermal runaway. This enables more comprehensive testing and analysis of cell 3 after the test, including measurement of key data such as the amount of intrusion into cell 3, making it possible to conduct in-depth research on the relationship between thermal runaway and structural changes in cell 3, and providing more detailed and accurate data support for the protection design of the vehicle battery pack.

[0080] The professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0081] It should be noted that the phrases "one implementation", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0082] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or electronic device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or electronic device. In the absence of more limitations, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or electronic device including the elements.

[0083] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. A battery cell impact test device, characterized in that: It includes a base, a mounting plate, a fixing assembly and a protective box; The placement plate is installed on the base, and the placement plate is arranged vertically, and the position of the placement plate relative to the base in a first direction is adjustable; The fixing assembly is used to place the battery cell to be subjected to the impact test on the placement plate, and the position of the battery cell relative to the placement plate along the second direction is adjustable, and the degree of fastening between the battery cell and the placement plate is adjustable; The protection box is used to contain liquid, and the opening of the protection box faces upward; When conducting an impact test, the base is placed directly in front of the impact direction of the impactor of the battery cell impact test, and by adjusting the position of the placement plate relative to the base in the first direction and the position of the battery cell relative to the placement plate in the second direction, the expected impact position of the battery cell is made to be the same as the impact direction, wherein the impact direction, the first direction and the second direction are perpendicular to each other; and the protective box is placed below the battery cell.

2. The battery cell impact test device according to claim 1, characterized in that: The fixing assembly includes an adjusting device and a fixing wire, the fixing wire extends along the second direction, the adjusting device is fixedly connected to the movable end of the fixing wire, and the adjusting device is used to adjust the degree of compression between the fixing wire and the battery cell to adjust the degree of tightness between the battery cell and the mounting plate.

3. The battery cell impact test device according to claim 2, characterized in that: The regulating device comprises a cylinder and a gas valve, and both the cylinder and the gas valve are mounted on the mounting plate; The air cylinder comprises a cylinder body and an air rod, wherein the air rod is fixedly connected to the fixed end of the fixing wire, and the air valve is used to provide power to the air rod to drive the air rod to move relative to the cylinder body to adjust the degree of compression between the fixing wire and the battery core.

4. The battery cell impact test device according to claim 3, characterized in that: The cylinder comprises a fastening block, the fastening block comprises a groove, the groove faces the placement plate, the cylinder body is located in the groove, and the fastening block is fixedly connected to the placement plate to install the cylinder to the placement plate.

5. The battery cell impact test device according to claim 2, characterized in that: The battery cell impact test device comprises a first stopper and a second stopper, wherein the first stopper and the second stopper are respectively fixedly connected to the placement plate, and the second stopper is spaced apart from the first stopper, and the area between the second stopper and the first stopper on the placement plate constitutes a battery cell placement area of ​​the battery cell; The fixed end of the fixing wire is fixed on the first stopper, and the movable end of the fixing wire is connected to the adjusting device after passing through the second stopper.

6. The battery cell impact test device according to claim 5, characterized in that: The second stopper includes a plurality of semicircular limiting grooves / holes, and the plurality of limiting grooves / holes are arranged along the first direction. The movable end of the fixing wire passes through the limiting grooves / holes and is connected to the adjusting device. The limiting grooves / holes are used to limit the movement of the fixing wire along the first direction.

7. The battery cell impact test device according to claim 5, characterized in that: The first stopper includes a lower stopper and an upper stopper which are arranged vertically along the placement plate, the lower stopper is fixedly connected to the placement plate, the upper stopper is detachably connected to the lower stopper, and the fixed end of the fixing wire is fixed between the lower stopper and the upper stopper.

8. The battery cell impact test device according to any one of claims 1 to 7, characterized in that: The number of the fixing wires is at least two, and at least two of the fixing wires are spaced apart along the first direction.

9. The battery cell impact test device according to any one of claims 1 to 7, characterized in that: The battery cell impact test device comprises a sliding assembly, the placement plate is mounted on the base via the sliding assembly, and the sliding assembly is used to make the position of the placement plate relative to the base in the first direction adjustable.

10. The battery cell impact test device according to claim 9, characterized in that: The sliding assembly comprises at least one sliding rail extending along a first direction, at least one sliding block is mounted on the sliding rail, and the sliding block is slidably connected to the sliding rail; The slide rail is fixedly connected to the base, and the slider is fixedly connected to the placement plate; or the slide rail is fixedly connected to the placement plate, and the slider is fixedly connected to the base.

11. The battery cell impact test device according to claim 9, characterized in that: The battery cell impact test device comprises a driving assembly, and the driving assembly is used to drive the placement plate to move along the first direction of the base through the sliding assembly.

12. The battery cell impact test device according to claim 11, characterized in that: The driving assembly includes a lead screw and a connecting block, wherein the lead screw is rotatably connected to the base, the connecting block is fixedly connected to the placement plate, and a threaded hole matching with the threaded column section of the lead screw is provided on the connecting block, and the threaded column section of the lead screw is connected to the connecting block through the threaded hole; When the lead screw is rotated relative to the base, the lead screw drives the connecting block to move along the first direction, thereby driving the placement plate to move relative to the base along the first direction through the sliding assembly.

13. The battery cell impact test device according to claim 12, characterized in that: The base includes a top beam and a bottom beam, and the lead screw passes through the top beam and the bottom beam so that the lead screw is rotatably connected to the base.

14. A battery cell impact test system, characterized in that: The battery cell impact test system comprises an impactor and a battery cell impact test device as claimed in any one of claims 1 to 13.

15. A battery cell impact test method, characterized in that: The battery cell impact test method is applied to the battery cell impact test system as claimed in claim 14, and the battery cell impact test method comprises: By adjusting the position of the placement plate relative to the base in the first direction and the position of the battery cell relative to the placement plate in the second direction, the expected impact position of the battery cell is the same as the impact direction of the impactor; Placing a protective box below the battery cell; Controlling the impactor to impact the battery cell; During the test, if it is determined that the battery cell has a tendency to thermal runaway, the tightness of the battery cell and the mounting plate is adjusted through a fixing assembly so that the battery cell falls from the mounting plate into the protective box, so that the battery cell is at least partially submerged in the liquid in the protective box.

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