Battery cell impact test device, system and method

Abstract

The present application relates to a battery cell impact test device, system and method, wherein 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 a first direction is adjustable, so that the first direction position of the battery cell is adjustable. In addition, the battery cell can be placed on the placement plate by a fixing assembly, and the position of the battery cell relative to the placement plate along a second direction is adjustable, and the degree of tightness between the battery cell and the placement plate is adjustable. 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. In addition, the battery cell impact test device of the present application also adds a protective box with an upward opening. When it is found that the battery cell has a tendency to thermal runaway, the degree of tightness between the battery cell and the placement plate can be adjusted by the fixing assembly, so that the battery cell falls from the placement plate into the liquid in the protective box, thereby controlling the intensity of the thermal runaway of the battery cell.

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, cell shock testing is a critical step in assessing 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 cell shock testing technology a focus of industry attention.

[0003] Currently, battery cells have a high probability of thermal runaway (fire) during impact testing. Related technologies generally place the battery cells horizontally on a test bench and use an impactor to drop the cells vertically when conducting impact tests on battery cells. However, in terms of the impact power source and impact direction, it relies on gravity as the power source, and the impact direction is limited to the vertical direction. This makes horizontally launched impactors unsuitable for battery cell impact testing, greatly limiting the range of test equipment and the diversity of test methods. This method is also extremely complex in adjusting the impact energy, requiring precise adjustments to multiple factors such as the impactor's mass and drop height, which affects the reliability of the test. Furthermore, in related technologies, after a battery cell experiences thermal runaway (fire), the combustion process is relatively intense, generating a large amount of toxic gases. The battery cell is also severely deformed after combustion, making it impossible to measure its external shape, which affects the collection of test data and further affects 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 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 second direction, so that the battery cell can be impact tested using a transversely emitted impactor, and it is convenient to adjust the impact energy, thereby improving the convenience and reliability of the test, and by adding a protective 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 objectives, in a first aspect, the present application provides a battery cell impact test device, comprising a base, a placement plate, a fixing assembly and a protective box;

[0006] The placement plate is mounted 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;

[0007] 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;

[0008] The protection box is used to hold liquid, and the opening of the protection box faces upward;

[0009] 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 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.

[0010] 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.

[0011] Furthermore, the regulating device includes a cylinder and a valve, and both the cylinder and the valve are mounted on the placement plate;

[0012] The air cylinder includes a cylinder body and an air rod, the air rod is fixedly connected to the movable 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.

[0013] Furthermore, 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.

[0014] Furthermore, the battery cell impact test device includes 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;

[0015] The fixed end of the fixing wire is fixed on the first stopper, and the movable end of the fixing wire passes through the second stopper and is connected to the adjusting device.

[0016] Furthermore, the second stop block includes a plurality of semicircular limiting grooves or limiting holes, and the plurality of limiting grooves or limiting holes are arranged along the first direction. The movable end of the fixing wire passes through the limiting grooves or the limiting holes and is connected to the adjusting device. The limiting grooves or the limiting holes are used to limit the movement of the fixing wire along the first direction.

[0017] 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.

[0018] Furthermore, 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.

[0019] Furthermore, the battery cell impact test device includes a sliding assembly, and 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.

[0020] Furthermore, the sliding assembly includes at least one slide rail extending along a first direction, at least one slider is mounted on the slide rail, and the slider is slidably connected to the slide rail;

[0021] 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.

[0022] Furthermore, the battery cell impact test device includes 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.

[0023] Furthermore, the drive 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 is provided on the connecting block to cooperate with the threaded column section of the lead screw, and the threaded column section of the lead screw is connected to the connecting block through the threaded hole;

[0024] 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.

[0025] 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.

[0026] To achieve the above-mentioned purpose, in a second aspect, the present application further provides a battery cell impact test system, which includes an impactor and a battery cell impact test device as described in any one of the first aspects.

[0027] To achieve the above-mentioned purpose, in a second aspect, the present application further 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:

[0028] 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 consistent with the impact direction of the impactor;

[0029] Placing a protective box below the battery cell;

[0030] Controlling the impactor to impact the battery cell;

[0031] 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 placement plate is adjusted through the fixing assembly so that the battery cell falls from the placement plate into the protective box, so that the battery cell is at least partially submerged in the liquid in the protective box.

[0032] Beneficial effects of this application:

[0033] 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 by 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 by adjusting the position in the first direction and the position 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. The protective box 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 it is found that the battery cell has a tendency of thermal runaway, the tightness of the battery cell and the mounting plate can be adjusted through the fixing component, 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 due to intense combustion, reducing pollution to the test environment, and at the same time protecting the health of the operator, and ensuring the relative integrity of the battery cell after the test, providing possibilities for subsequent data analysis, ensuring the reliable collection of test data, and improving the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a battery cell impact test system provided in an embodiment of the present application is shown;

[0035] Figure 2 A schematic diagram of a battery cell impact test device provided in an embodiment of the present application is shown (the protective box is not shown in the figure);

[0036] Figure 3 Another schematic diagram of a battery cell impact test device provided in an embodiment of the present application is shown;

[0037] Figure 4 A schematic diagram of a cylinder provided in an embodiment of the present application is shown;

[0038] Figure 5 A schematic diagram of a gas valve provided in an embodiment of the present application is shown;

[0039] Figure 6 A schematic diagram showing a second stopper provided in an embodiment of the present application is shown;

[0040] Figure 7Another schematic diagram showing a second stopper provided in an embodiment of the present application;

[0041] Figure 8 A schematic diagram showing a first stopper provided in an embodiment of the present application is shown;

[0042] Figure 9 Another schematic diagram showing a first stopper provided by an embodiment of the present application;

[0043] Figure 10 A schematic diagram of a base provided in an embodiment of the present application is shown (including a sliding assembly);

[0044] Figure 11 A schematic diagram of a lead screw provided in an embodiment of the present application is shown;

[0045] Figure 12 A schematic diagram of a placement plate provided in an embodiment of the present application is shown (including a connection block);

[0046] Figure 13 Another schematic diagram of a placement plate provided in an embodiment of the present application is shown.

[0047] in:

[0048] 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 bar; 12. Mounting plate; 13. Sliding assembly; 131. Slide rail; 132. Slider; 14. Fixing assembly; 141. Fixing wire; 142. Adjusting device; 1421. Cylinder; 1421a. Cylinder Body; 1421b, gas rod; 1421c, fastening block; 1422, gas valve; 15, protective box; 16, first stopper; 161, lower stopper; 162, upper stopper; 17, second stopper; 171, limiting 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;

[0049] 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;

[0050] 210, first threaded hole; 220, second threaded hole; 230, third threaded hole; 240, fourth threaded hole;

[0051] 310, vent hole; 320, air inlet hole; 330, air outlet hole;

[0052] 410, matching hole;

[0053] 510. Mounting hole. DETAILED DESCRIPTION

[0054] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the 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 embodiments, 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 the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0055] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Therefore, the illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0056] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the 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 embodiments, 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 the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0057] 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.

[0058] 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 .

[0059] The placement plate 12 is mounted on the base 11 and arranged vertically, so that after the battery cell 3 to be impact tested is placed on the placement plate 12, the battery cell 3 can be impact tested in a 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 a first direction is adjustable, thereby achieving adjustable position of the battery cell 3 in the first direction, better ensuring that the expected impact position of the battery cell 3 in the first direction is consistent with the impact direction of the impactor 2.

[0060] The fixing assembly 14 is used to position the battery cell 3 to be impact tested on the placement plate 12. 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 also adjustable. In other words, after the battery cell 3 is positioned on the placement plate 12 via the fixing assembly 14, the position of the battery cell 3 on the placement plate 12 along the second direction is adjustable, thereby better ensuring that the expected impact position of the battery cell 3 in the second direction is aligned with the impact direction of the impactor 2. Furthermore, the adjustable degree of fastening between the battery cell 3 and the placement plate 12 facilitates removal of the battery cell 3 from the placement plate 12.

[0061] Among them, the protection box 15 is used to hold liquid, and the opening of the protection box 15 faces upward. Moreover, when performing an impact test, the protection box 15 is placed under the battery cell 3. With such an arrangement, during the impact test, if it is determined that the battery cell 3 has a tendency to 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.

[0062] 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-down direction (vertical), and the second direction is the left-right direction. For another example, the impact direction is recorded as the front-to-back direction, the first direction is the left-right direction, and the second direction is the up-down direction.

[0063] In this embodiment, the placement plate 12 is arranged vertically and moves relative to the base 11 in a first direction. This means that the position of the battery cell 3 in the first direction can be precisely adjusted according to actual testing requirements. Furthermore, after the battery cell 3 is positioned on the placement plate 12 via the fixing assembly 14, the position of the battery cell 3 on the placement plate in the second direction can also be easily adjusted. During an impact test, the operator can easily place the base 11 directly in front of the impactor 2 for the battery cell impact test. Then, by adjusting the base 11 in the first and second directions, the expected impact position of the battery cell 3 is aligned with the impact direction of the impactor 2. This feature ensures that the impactor 2 accurately impacts the predetermined position of the battery cell 3, avoiding the problem of inaccurate or unreliable test results caused by deviations in the impact position. During the actual development and quality testing of battery cells 3, accurate impact test results can provide reliable data support for the safety assessment and performance optimization of the battery cell 3. This helps researchers gain a deeper understanding of the internal structural changes and performance of the battery cell 3 when subjected to impact, thereby enabling targeted improvements to the design and manufacturing process of the battery cell 3 and improving its quality and safety.

[0064] In addition, the application of the battery cell impact test device 1 of this embodiment breaks the limitations of traditional vertical impact tests, allowing the horizontally launched impactor 2, which was originally unable to be used due to the impact direction restriction, to be used for battery cell impact tests. The horizontally launched impactor 2 has obvious advantages in terms of impact energy adjustment, making it easier to adjust the impact energy, so that impact tests of different energy levels can be carried out more efficiently during the test process, without having to spend a lot of time adjusting the impact height and the mass of the impactor 2 as in traditional vertical impact tests. 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, thereby improving scientific research and production efficiency and reducing test costs.

[0065] That is, in this embodiment, the battery cell 3 is placed by the battery cell impact test device 1, and the horizontally launched impactor 2 can be used to perform an impact test on the battery cell 3. The horizontal impact is more convenient for adjusting the impact energy, which can improve the convenience and efficiency of the test.

[0066] It should also be noted that after thermal runaway, the combustion process of the battery cell 3 is relatively intense, generating a large amount of toxic gases. After combustion, the battery cell 3 is severely deformed, making it impossible to measure its appearance data. This embodiment adds a protective box 15, which contains a liquid (e.g., water) that can control thermal runaway. During the battery cell impact test, the protective box 15 is placed below the battery cell 3. The impactor 2 is then controlled to impact the battery cell 3. During the test, if the battery cell 3 is determined to be prone to thermal runaway, the fastening between the battery cell 3 and the mounting plate 12 is adjusted using the fixing assembly 14, causing the battery cell 3 to fall from the mounting plate 12 into the protective box 15. Because the liquid in the protective box 15 can at least partially submerge the battery cell 3, the intensity of the thermal runaway of the battery cell 3 can be controlled, significantly reducing the generation of toxic gases and the deformation of the outer shell caused by the intense combustion, reducing pollution to the test environment, and protecting the health of the operator. The relative integrity of the battery cell 3 after the test is ensured, making subsequent data analysis possible and improving the effectiveness of the test.

[0067] In one exemplary embodiment, reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, a battery cell impact test system and battery cell impact test device 1, as well as a battery cell impact test method applicable 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. The battery cell 3 to be impact tested 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, without limitation. The number of fixing wires 141 may be one, two, or more, without limitation. When there are at least two fixing wires 141, the at least two fixing wires 141 are spaced apart along a first direction to better secure the battery cell 3. Furthermore, the fixing wires 141 extend along a second direction. Therefore, even after the battery cell 3 moves laterally relative to the placement plate 12, the fixing wire 141 can still press the battery cell 3 against the placement plate 12. This arrangement allows the battery cell 3 to be adjusted in the second direction relative to the placement plate 12.

[0068] The adjusting device 142 is fixedly connected to the movable end of the fixing wire 141 and is used to adjust the degree of compression between the fixing wire 141 and the battery cell 3, thereby adjusting the tightness 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, expanding its applicability. Furthermore, the degree of compression between the fixing wire 141 and the battery cell 3 can be adjusted as needed to better meet the requirements of the impact test.

[0069] For example, reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the fixing wire 141 can be a steel wire rope, and the adjustment device 142 includes a cylinder 1421 and a valve 1422, both of which are mounted on the placement plate 12. The cylinder 1421 includes a cylinder body 1421a and a gas rod 1421b, the gas rod 1421b is fixedly connected to the movable end of the fixing wire 141, and 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.

[0070] 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 the connection, 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 wire rope is placed on the metal plate, and then a suitable pressure block is covered on the wire rope. The 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 wire rope, thereby achieving fixation. For another example, a wedge-shaped sleeve is used, and one end of the wire rope is inserted into the wedge-shaped sleeve. 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 wire rope will be tightly clamped by the wedge-shaped structure to achieve fixation.

[0071] When conducting a battery cell impact test, first place the base 11 directly in front of the impactor 2. Next, adjust the first direction of the placement plate 12 using the sliding assembly 13, while also adjusting the second direction of the battery cell 3 within the placement area, so that the expected impact position of the battery cell 3 aligns with the impact direction of the impactor 2. Next, based on the size and model of the battery cell 3, control the movement of the gas rod 1421b of the cylinder 1421 using the gas valve 1422, adjusting the degree of compression between the fixing wire 141 and the battery cell 3 to ensure that the battery cell 3 remains stable during the test. The battery cell 3 can then be impacted to complete the impact test.

[0072] In this embodiment, an adjusting device 142 consisting of a cylinder 1421 and an air valve 1422 is used, and the operation process is simple and convenient. Simply by 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 assessment of the battery cell 3.

[0073] 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 with tools), and then the air valve 1422 is closed and the battery cell 3 is removed. If the battery cell 3 has a tendency of thermal runaway (fire), the air valve 1422 can be closed. After the air valve 1422 is closed, the fixing wire 141 is loosened, 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 removed. After removing 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.

[0074] It should be noted that, in addition to being 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. The electric push rod is an electric drive device that converts the rotational motion of the motor into the linear reciprocating motion of the 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 usually consists 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 is made to move linearly in the nut, thereby adjusting the degree of compression between the fixed wire 141 and the battery cell 3.

[0075] The cylinder 1421 may further include a fastening block 1421c. The fastening block 1421c may be a concave block, that is, it includes a groove that fits within 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 positioned within the groove, and the fastening block 1421c is fixedly connected to the mounting plate 12, thereby securing the cylinder 1421 to the mounting plate 12.

[0076] The fastening block 1421c and the placement plate 12 may be connected by snap fastening, adhesive bonding, or screws or other fasteners 1513, without limitation. 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. The fastening block 1421c and the placement plate 12 may be fixedly connected by inserting the fastener 1513 into the two through-holes, thereby mounting the cylinder 1421 on the placement plate 12.

[0077] During installation, cylinder body 1421a of cylinder 1421 rests securely within the groove, effectively preventing vibration or displacement during operation and ensuring operational stability. This adaptable design provides a reliable support structure for cylinder 1421, enabling it to more accurately drive air rod 1421b, thereby precisely adjusting the degree of compression between fixing wire 141 and battery cell 3 and ensuring reliable retention of battery cell 3 during testing.

[0078] 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. 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 when the battery cell 3 undergoes an impact test, thereby preventing impurities from causing damage to surrounding equipment and personnel, and 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.

[0079] 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 adjustment device 142. In other words, by providing the first stopper 16 and the second stopper 17, a gap can be created between the fixing wire 141 and the mounting plate 12, thereby facilitating the fixing of the battery cell 3 between the fixing wire 141 and the mounting plate 12.

[0080] 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 snap fastener, or by fasteners 1513 such as screws, or by other means, which are not limited to this. The fixed end of the fixing wire 141 is fixed between the lower stopper 161 and the upper stopper 162, thereby achieving reliable fixation of the fixed end of the fixing wire 141, preventing it from loosening during the test, and facilitating replacement or adjustment of the fixing wire 141. When the fixing wire 141 needs to be replaced, it is easy to operate by simply removing the upper stopper 162 without having to replace the entire first stopper 16, thereby reducing maintenance costs and time.

[0081] In addition, in this embodiment, the second stopper 17 may include a plurality of semicircular limiting grooves or limiting 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 or limiting holes are arranged along the first direction, and the movable end of the fixing wire 141 passes through the limiting grooves or limiting holes and is connected to the adjusting device 142. The limiting grooves or limiting holes are used to limit the movement of the fixing wire 141 along the first direction.

[0082] 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 facing 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 farther from the placement plate 12. The specific location of the limiting holes can be determined based on the connection position between the lower stopper 161 and the upper stopper 162.

[0083] When adjusting the degree of compression between the fixing wire 141 and the battery cell 3, the limiting groove or limiting hole ensures the accurate movement direction of the fixing wire 141, preventing the fixing wire 141 from deflecting in the first direction, thereby improving the adjustment precision and stability. Furthermore, the specific position of the limiting groove 171 / hole is determined based on the connection position between the lower stopper 161 and the upper stopper 162, further optimizing the movement path of the fixing wire 141 and making the entire adjustment process smoother and more reliable. Furthermore, the semicircular limiting groove or limiting hole further prevents the fixing wire 141 from damage due to wear during the adjustment process, further improving the stability of the fixing wire 141 and extending its service life.

[0084] In one exemplary embodiment, reference Figure 1 、 Figure 2 and Figure 10 As shown, a battery cell shock test system and a battery cell shock test device 1 are provided, as well as a battery cell shock test method applied to the battery cell shock test system. In this embodiment, the battery cell shock test device 1 may include a sliding assembly 13, through which a mounting plate 12 is mounted to the base 11. The sliding assembly 13 is used to adjust the position of the mounting plate 12 relative to the base 11 in the first direction.

[0085] The sliding assembly 13 may include at least one sliding rail 131 extending along a first direction. At least one sliding block 132 is mounted on the sliding rail 131 . The sliding block 132 is slidably connected to the sliding rail 131 .

[0086] 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 be moved relative to the base 11 in the first direction via the sliding assembly 13.

[0087] For example, the base 11 may include two columns, 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 provided 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 respectively fixedly connected to the placement plate 12. 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.

[0088] It should be noted that the specific positions and numbers 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.

[0089] In addition, reference Figure 1 、 Figure 2 as well as Figure 11 and Figure 12 As shown, in this embodiment, the battery cell impact test device 1 may further include a drive assembly 18. The drive assembly 18 may be used to drive the placement plate 12 to move relative to the base 11 in a first direction via the sliding assembly 13. The drive assembly 18 may include a lead screw 181 and a connecting block 182. 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 can be referred to the connection method between the fastening block 1421c and the placement plate 12, and will not be described in detail here.

[0090] The connecting block 182 is provided with a threaded hole that mates with the threaded column section 1811 of the lead screw 181. The threaded column section 1811 of the lead screw 181 is connected to the connecting block 182 via the threaded hole. Therefore, when the lead screw 181 is rotated relative to the base 11, the lead screw 181 drives the connecting block 182 to move in the first direction. Since the connecting 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 via the sliding assembly 13.

[0091] 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 .

[0092] For example, the top of lead screw 181 is a cylindrical hexagonal iron block 1812, the bottom of lead screw 181 is a cylindrical body 1813, and between hexagonal iron block 1812 and cylindrical body 1813 is a threaded column section 1811. Top beam 1113 is provided with a through hole that matches hexagonal iron block 1812 and is used to accommodate hexagonal iron block 1812. Bottom beam 1114 is provided with a through hole that matches cylindrical body 1813 and is used to accommodate cylindrical body 1813. This design ensures both the flexibility of lead screw 181's rotation and its stable installation on 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.

[0093] The drive assembly 18 is convenient for operators to use common tools (such as wrenches) to perform 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 tedious operating 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 operational errors. In addition, the 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 screw 181 and reduces the shaking and deviation of the 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 function of the sliding assembly 13, ensure that the placement plate 12 can move smoothly along 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 and frequent use.

[0094] It should be noted that, in addition to the aforementioned structure, the drive assembly 18 may also have other structures, without limitation. For example, the drive assembly 18 may be an electric push rod mechanism, including a motor, a reduction gear, a screw, a nut, and a push rod. The push rod may be fixedly connected to the placement plate 12. The motor drives the screw to rotate via the reduction gear, and the nut moves linearly on the screw, thereby pushing the push rod to extend or retract, thereby driving the placement plate 12 to move in the first direction.

[0095] 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 cooperating with the sliding assembly 13 and the driving assembly 18, thereby adjusting the first direction position of the battery cell 3 on the placement plate 12, ensuring that the battery cell 3 is in the optimal position, and improving the accuracy and reliability of the test results. Secondly, the cooperation between the driving assembly 18 and the sliding assembly 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 assembly 18, without the need for complicated manual operations or additional tools, reducing the operating steps and time costs.

[0096] In one exemplary embodiment, reference Figures 1 to 13 As shown, a telecommunications shock test system and a cell shock test device 1 thereof are provided, as well as a cell shock test method applicable to the cell shock test system. In this embodiment, the cell shock test device 1 may include a base 11, a mounting plate 12, a sliding assembly 13, a fixing wire 141, an adjustment device 142, and a drive assembly 18. The fixing wire 141 may be a steel wire rope.

[0097] The base 11 may include a hollow L-shaped iron frame 111, with reinforcement bars 112 welded to both ends of the L-shaped frame 111. This greatly enhances the structural strength of the base 11, enabling it to withstand various external forces during the test. The L-shaped 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, respectively designated as a first column 1111 and a second column 1112.

[0098] The sliding assembly 13 may include a slide rail 131 and a slider 132. A slide rail 131 is welded to the front of each of the first and second columns 1111 and 1112 (on the side facing away from the reinforcement bar 112). Each slide rail 131 is provided with two sliders 132. Furthermore, the placement plate 12 is located in front of the base 11 and is provided with four first through-holes 110. Each slider 132 is provided with a mounting hole 510. The four mounting holes 510 of the four sliders 132 correspond to the four first through-holes 110 on the placement plate 12, thereby securely connecting the sliders 132 to the placement plate 12.

[0099] 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 provided on both sides of the groove of the fastening block 1421c. 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 of the cylinder 1421 (the cylinder 1421 body) 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.

[0100] Cylinder body 1421a is provided with two vent holes 310. When air is introduced or exhausted through these two vent holes 310, the gas rod 1421b extends or retracts. The air valve 1422 can be a pneumatic control valve, having an air inlet 320 and two air outlet holes 330. The two air outlet holes 330 are connected to the two vent holes 310 in cylinder body 1421a in a one-to-one correspondence. Thus, the extension or retraction of the gas rod 1421b can be controlled by the air valve 1422.

[0101] 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 having substantially the same thickness and length as the second stopper 17, and having first threaded holes 210 formed at both ends and in the middle. A second threaded hole 220 is formed at each end of the back surface of the lower stopper 161, and the second threaded holes 220 match the second through holes 120 on the placement plate 12. The lower stopper 161 is fixedly connected to the placement plate 12 via the second threaded holes 220 and the second through holes 120. The upper stopper 162 may be a square iron block having substantially the same length and width as the lower stopper 161, and being thinner than the lower stopper. Seventh through holes 170 are formed at both ends and in the middle, with a distribution and size corresponding to the first threaded holes 210. The upper stopper 162 is connected to the lower stopper 161 via the first threaded holes 210 and the seventh through holes 170.

[0102] Among them, the second stop block 17 can be a square iron block, and a plurality of semicircular limiting 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.

[0103] The drive 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, and the bottom is a smooth cylinder 1813. A threaded column section 1811 is located between the hexagonal iron block 1812 and the cylinder 1813. The connecting block 182 is disposed 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 may be welded or fixedly connected in other ways, which are not limited to this. 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 not only can be connected to the lead screw 181, but also can play a load-bearing role on the placement plate 12. The top beam 1113 of the L-shaped iron frame 111 is provided with a fifth through-hole 150 sized to match the hexagonal iron block 1812, and the bottom beam 1114 is provided with a sixth through-hole 160 sized to match the cylindrical body 1813. The lead screw 181 is installed in the tower, with the hexagonal iron block 1812 positioned in the fifth through-hole 150, the threaded column section 1811 in the fourth threaded hole 240, and the cylindrical body 1813 in the sixth through-hole 160.

[0104] When performing the impact test on the battery cell 3, place the horizontally launched impactor 2 directly in front of the precisely positioned battery cell impact test apparatus 1 to ensure the correct relative positioning of the battery cell impact test apparatus 1 and impactor 2, thus laying the foundation for the accuracy of subsequent tests. Place the battery cell 3 tightly against the mounting plate 12, and adjust the left-right position (i.e., the position in the second direction) and the up-down position (i.e., the position in the first direction) of the battery cell 3 so that the pre-set expected impact position on the battery cell 3 and the impact direction of the impactor 2 are in the same vertical plane. Subsequently, place the steel wire rope outside the battery cell 3, so that the battery cell 3 is located between the mounting plate 12 and the steel wire rope, ready for subsequent fixing operations.

[0105] 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 and firmly pressing the battery cell 3 onto the mounting plate 12 to ensure that the battery cell 3 will not be displaced during the test.

[0106] In this embodiment, for 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.

[0107] Before performing the impact test, place a protective box 15 (which can be a metal water tank) directly below the battery cell 3 and inject an appropriate amount of water into the protective box 15, ensuring that the water completely submerges the battery cell 3. After completing these preparatory steps, activate the impactor 2 and perform the impact test on the battery cell 3. After the impactor 2 strikes the battery cell 3, observe the battery cell's condition. If the battery cell 3 shows no signs of thermal runaway (fire), the operator can manually support the battery cell 3 and then close the air valve 1422 to safely remove the battery cell 3. If the battery cell 3 shows signs of thermal runaway (fire), the air valve 1422 can be immediately closed. At this point, the air rod 1421b will no longer tighten the wire rope, and the battery cell 3 will fall into the protective box 15 below due to its unrestrained position. The water in the protective box 15 effectively controls the intensity of the thermal runaway. After the battery cell 3 shows 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 entire vehicle. At this point, the impact test of the entire battery cell 3 is completed.

[0108] 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 actual use scenarios, such as the horizontal impact on the battery cell 3 in the battery pack due to collisions, bumps, etc. during vehicle driving. This simulation close to actual working conditions makes the test results more realistic and guiding, provides a more reliable data basis for the protection design of the entire vehicle battery pack, and helps to improve the safety and stability of the battery pack in the actual use environment. Moreover, the horizontal impact is easy to adjust the energy, so that the test personnel can flexibly set the impact energy according to the characteristics and test requirements of different battery cells 3, carry out diversified tests, and conduct in-depth research on the performance of the battery cell 3 under different impact energies, thereby promoting the comprehensiveness and depth of the research on the safety performance of the battery cell 3.

[0109] 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.

[0110] This embodiment adds a protective box 15. When the battery cell 3 shows a tendency to thermal runaway, the battery cell impact test device 1 is controlled to make the battery cell 3 fall into the water in the protective box 15. The water can quickly absorb the large amount of heat released by the battery cell 3 during the thermal runaway process, reduce the temperature of the battery cell 3, and thus effectively inhibit the further development of thermal runaway. It can also absorb and dilute the toxic gases generated by 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 and reduces the potential harm to the health of the test personnel, but also helps to reduce pollution to the surrounding environment. In addition, the violent combustion of the battery cell 3 during thermal runaway will cause its outer shell to deform severely, which will bring difficulties to subsequent data analysis, such as the inability to accurately measure the external dimensions and internal structural changes of the battery cell 3. The provision of the protective 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 measuring key data such as the intrusion volume of cell 3. This provides the possibility for in-depth research on the relationship between thermal runaway and structural changes in cell 3, and provides more detailed and accurate data support for the protection design of the entire vehicle battery pack.

[0111] 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 in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0112] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiments may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0113] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any 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 that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or electronic device. In the absence of more limitations, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or electronic device that includes the element.

[0114] 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 substitutions or modifications made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A battery cell impact test device, characterized in that: Including base, mounting plate, fixing components and protective box; The placement plate is mounted 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 that can completely submerge the battery core, and the opening of the protection box faces upward; During the impact test, the base is placed in front of the impact direction of the impactor of the battery cell impact test, and 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 are adjusted so that the expected impact position of the battery cell is 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, the first direction is vertical, and the impact direction is horizontal; The fixing assembly includes an adjusting device and a fixing wire, the fixing wire extending along the second direction, the adjusting device 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, so as to adjust the degree of fastening between the battery cell and the placement plate; The regulating device includes a cylinder and a valve, and both the cylinder and the valve are mounted on the placement plate; The air cylinder includes a cylinder body and an air rod, the air rod is fixedly connected to the movable 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; The battery cell impact test device includes 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 for the battery cell; The fixed end of the fixing wire is fixed to the first stopper, and the movable end of the fixing wire passes through the second stopper and is connected to the adjusting device; The second stopper includes a plurality of semicircular limiting grooves or limiting holes, wherein the plurality of limiting grooves or limiting holes are arranged along the first direction, the movable end of the fixing wire passes through the limiting grooves or limiting holes and is connected to the adjusting device, and the limiting grooves or limiting holes are used to limit the movement of the fixing wire along the first direction; Among them, when the second stop block includes multiple semicircular limiting grooves, the limiting grooves are located on the side of the second stop block away from the placement plate; when the second stop block includes multiple semicircular limiting holes, the limiting holes are through holes and are located on the side of the second stop block farther away from the placement plate.

2. The battery cell impact test device according to claim 1, characterized in that: The cylinder includes a fastening block, which includes a groove facing the placement plate. The cylinder body is located in the groove. The fastening block is fixedly connected to the placement plate to install the cylinder on the placement plate.

3. The battery cell impact test device according to claim 1, characterized in that: 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.

4. The battery cell impact test device according to any one of claims 1 to 3, 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.

5. The battery cell impact test device according to any one of claims 1 to 3, characterized in that: The battery cell impact test device includes a sliding assembly, the placement plate is mounted on the base via the sliding assembly, and the sliding assembly is used to adjust the position of the placement plate relative to the base in the first direction.

6. The battery cell impact test device according to claim 5, characterized in that: The sliding assembly includes at least one slide rail extending along a first direction, 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.

7. The battery cell impact test device according to claim 5, characterized in that: The battery cell impact test device includes 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.

8. The battery cell impact test device according to claim 7, characterized in that: The drive 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 is provided on the connecting block to cooperate with the threaded column section of the lead screw, 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.

9. The battery cell impact test device according to claim 8, 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.

10. A battery cell impact test system, characterized in that: The battery cell impact test system includes an impactor and the battery cell impact test device according to any one of claims 1 to 9.

11. A battery cell impact test method, characterized in that: The battery cell impact test method is applied to the battery cell impact test system according to claim 10, and the battery cell impact test method includes: 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 consistent with the impact direction of the impactor; Placing a protective box below the battery cell and injecting liquid into the protective box that can completely submerge 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 fastening of the battery cell to the mounting plate is adjusted by the fixing assembly so that the battery cell falls from the mounting plate into the protective box, so that the battery cell is completely submerged in the liquid in the protective box; After the battery cell has no obvious reaction, the battery cell is taken out from the protection box, the intrusion amount of the battery cell is measured, and the relationship between the intrusion amount and the thermal runaway of the battery cell is analyzed.

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