Heavy object impact test device

Abstract

The utility model relates to the technical field of energy storage equipment test, in particular to a heavy object impact test device which comprises a box body and an impact unit. Wherein the to-be-tested piece and the impact unit are both placed in the box body, the impact unit is located above the to-be-tested piece, the impact unit comprises a balance weight piece and impact pieces, the multiple impact pieces are different in shape, any impact piece can be detachably connected to the balance weight piece, and the balance weight piece can be detachably connected to the impact unit. The impact unit can move in the vertical direction to adjust the height and impact the to-be-tested piece. By arranging a plurality of impact parts with different shapes, the impact parts with different shapes can be assembled on the counterweight part, so that the impact condition of various heavy objects encountered by the battery can be simulated.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment testing technology, and in particular to a heavy object impact testing device. Background Technology

[0002] Currently, in the battery manufacturing process, heavy object impact tests are required to verify their safety and reliability. Heavy object impact testing equipment uses an impact head to impact the battery during the impact operation. However, the impact head is not replaceable, and the simulation of the impact conditions encountered by the battery in actual use is relatively limited, failing to simulate the diverse heavy object impact scenarios that batteries may encounter. Utility Model Content

[0003] The purpose of this invention is to provide a heavy object impact testing device that can simulate various heavy object impact scenarios that batteries may encounter.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A heavy object impact testing apparatus is provided, comprising:

[0006] The test piece is placed inside the housing.

[0007] An impact unit is disposed inside the housing and located above the test piece. The impact unit includes a counterweight and multiple impact members, each with a different shape. Any one of the impact members can be detachably connected to the counterweight. The impact unit can move vertically to adjust its height and impact the test piece.

[0008] Optionally, the plurality of impact members includes a first impact member, the first impact member having a first portion;

[0009] The first part is a conical structure, with the tip of the conical structure facing the test piece, or the first part is a frustum structure, with the small-diameter end face of the frustum structure facing the test piece.

[0010] Optionally, the first part is a frustum conical structure, and the first impact member further includes a second part, which is connected to the small-diameter end face of the frustum conical structure, and the side of the second part facing the test member is provided with a spherical surface.

[0011] Optionally, the second part is a hemispherical structure, and the plane of the hemispherical structure is connected to the small-diameter end face.

[0012] Optionally, the plurality of impact members includes a second impact member, the second impact member having a first curved surface, the first curved surface being a cylindrical sidewall shape, and the axial direction of the cylindrical sidewall being horizontal, the first curved surface protruding toward the test member.

[0013] Optionally, it also includes a lifting unit, which includes a driving component and a transmission chain. The driving component is connected to a support plate inside the housing. One end of the transmission chain is wound around the output end of the driving component, and the other end is connected to the impact unit. The output end of the driving component can rotate along its own axis.

[0014] Optionally, the system also includes a lifting unit, which further includes a guide post and a first slider. The guide post extends vertically into the housing, and the first slider is slidably mounted on the guide post. The impact unit includes a first connecting plate, and the first slider is connected to the first connecting plate.

[0015] Optionally, the guide columns are spaced two apart, the lifting unit further includes two second sliders, the impact unit includes a second connecting plate, the second connecting plate is connected between the first connecting plate and the counterweight, the two second sliders are respectively connected to opposite sides of the second connecting plate, and the two second sliders are slidably engaged with the two guide columns.

[0016] Optionally, there are multiple counterweights, which can be connected sequentially, and any one of the counterweights can be detachably connected to the impact member and connected to the second connecting plate.

[0017] Optionally, the lifting unit further includes a safety pin, a safety hole is provided on the side wall of the guide column, the safety pin is inserted into the safety hole, and the safety pin part protrudes from the outside of the side wall of the guide column.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a heavy object impact testing device, including a housing and an impact unit. Both the test object and the impact unit are placed inside the housing, with the impact unit positioned above the test object. The impact unit includes a counterweight and multiple impact members of varying shapes. Each impact member is detachably connected to the counterweight. The impact unit can move vertically to adjust its height and impact the test object. By using multiple impact members of different shapes, various heavy object impacts that a battery might encounter can be simulated by assembling different shaped impact members onto the counterweight. Attached Figure Description

[0020] Figure 1This is a first-view structural schematic diagram of the heavy object impact testing device provided in this embodiment of the utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the heavy object impact testing device provided in this embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional view of the impact testing device for heavy objects provided in this embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first impact member provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the second impact member provided in this embodiment of the utility model;

[0025] Figure 6 This is a second-view structural schematic diagram of the heavy object impact testing device provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 1. Enclosure; 11. Outer casing; 12. Explosion-proof door; 13. Explosion-proof lock; 14. Observation window; 15. Exhaust pipe;

[0028] 2. Impact unit; 21. Counterweight; 22. Impact component; 221. First impact component; 2211. First part; 2212. Second part; 222. Second impact component; 2221. First curved surface; 23. First connecting plate; 24. Second connecting plate;

[0029] 3. Lifting unit; 31. Drive component; 32. Transmission chain; 33. Guide column; 34. First slider; 35. Second slider; 36. Safety pin;

[0030] 4. Support plate; 5. Pressure relief door; 6. Display controller; 7. Fire extinguisher;

[0031] 100. Item to be tested. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Currently, in the battery manufacturing process, heavy object impact tests are required to verify their safety and reliability. Heavy object impact testing equipment uses an impact head to impact the battery during the impact operation. However, the impact head is not replaceable, and the simulation of the impact conditions encountered by the battery in actual use is relatively limited, failing to simulate the diverse heavy object impact scenarios that batteries may encounter.

[0036] Therefore, this embodiment provides a heavy object impact testing device that can simulate various heavy object impact scenarios that batteries may encounter.

[0037] like Figures 1-6 As shown, the impact testing device of this embodiment includes a housing 1 and an impact unit 2. The test piece 100 and the impact unit 2 are both placed inside the housing 1, with the impact unit 2 positioned above the test piece 100. The impact unit 2 includes a counterweight 21 and multiple impact members 22, each with a different shape. Each impact member 22 can be detachably connected to the counterweight 21. The impact unit 2 can move vertically to adjust its height and impact the test piece 100. By setting multiple impact members 22 of different shapes, various impact scenarios encountered by the battery can be simulated by assembling different shaped impact members 22 onto the counterweight 21, thus expanding the testing range of the device.

[0038] Optionally, the enclosure 1 includes an outer casing 11, which is made of high-quality cold-rolled steel plate to ensure structural strength. Under uniform load conditions, the load-bearing capacity of the bottom plate of the enclosure 1 is greater than or equal to 500 kg, and it will not dent or deform after long-term use, and it can ensure insulation and fire resistance.

[0039] Optionally, the enclosure 1 also includes an explosion-proof door 12. One side of the outer enclosure 11 has an opening, and the explosion-proof door 12 is located at the opening. The explosion-proof door 12 is hinged to one side of the opening, and an explosion-proof lock 13 is provided on the other side. The explosion-proof lock 13 can ensure the safety of the staff.

[0040] Optionally, the enclosure 1 also includes an observation window 14, with an observation hole provided on the explosion-proof door 12. The observation window 14 is sealed to cover the observation hole so that staff can observe the test process inside the enclosure 1.

[0041] Optionally, the housing 1 further includes an exhaust pipe 15, which is inserted into the exhaust port of the housing 1. Part of the exhaust pipe 15 is located outside the housing 1, and part is located inside the housing 1, to facilitate timely exhaust of gas from inside the housing 1. In this embodiment, the exhaust pipe 15 is located at the top of the housing 1.

[0042] Optionally, the heavy object impact testing device also includes a pressure relief door 5, which is installed on the side wall of the outer casing 11. Optionally, a pressure relief door 5 is provided on each of the two opposite sides of the casing 1. When the pressure inside the casing 1 is too high, the pressure relief door 5 will be forced open, with an opening pressure greater than or equal to 0.01 MPa. The pressure relief door 5 is connected to the outer casing 11 by a high-strength hinge and four stainless steel explosion-proof chains (not shown in the figure). The casing 1 can meet the thermal abuse test requirements of lithium-ion batteries below 300Ah, such as lithium iron phosphate / ternary lithium batteries, and can withstand the combustion and explosion of the batteries without equipment damage.

[0043] Optionally, the plurality of impact members 22 may include a first impact member 221, which has a first portion 2211. The first portion 2211 is a conical structure with the tip of the conical structure facing the test member 100, or the first portion 2211 is a frustum structure with the small diameter end face of the frustum structure facing the test member 100.

[0044] Of course, the impact components 22 may include both frustum-shaped impact components 22 and cone-shaped impact components 22.

[0045] like Figure 4 As shown, in this embodiment, optionally, the first part 2211 is a frustum structure, and the first impact member 221 also includes a second part 2212. The second part 2212 is connected to the small-diameter end face of the frustum structure, and the side of the second part 2212 facing the test member 100 is provided with a spherical surface.

[0046] Optionally, in this embodiment, the second part 2212 is a hemispherical structure, with the plane of the hemispherical structure connected to the small-diameter end face. Of course, in other embodiments, the second part 2212 may also be a multi-hemispherical structure or a less-than-hemispherical structure.

[0047] Optionally, in this embodiment, the taper of the frustum structure is 33.4°, the radius of the hemispherical structure is 10mm, the radius of the small diameter end face of the frustum structure is also 10mm, and the radius of the large diameter end face of the frustum structure is 25mm.

[0048] When using the first impact member 221, the first impact member 221 falls in free fall, with the bottom of the battery facing upwards. The first impact member 221 falls from different heights and collides with the bottom of the battery, which can simulate the situation where the battery is hit by stone particles during driving. The penetration depth of the first impact member 221 can be measured, and the boundary of the impact causing thermal runaway of the battery can be explored.

[0049] like Figure 5 As shown, optionally, the plurality of impact members 22 includes a second impact member 222. The second impact member 222 has a first curved surface 2221. The first curved surface 2221 is in the form of a cylindrical sidewall, and the axial direction of the cylindrical sidewall is horizontal. The first curved surface 2221 protrudes toward the test member 100.

[0050] Optionally, in this embodiment, the radius of the cross-section of the cylindrical sidewall of the second impact member 222 is 70 mm.

[0051] When the second impact member 222 is used, the second impact member 222 falls freely from different heights and impacts the side and top of the battery with different energies. This can simulate the situation where the battery collides with obstacles such as roadblocks and streetlights during driving, and can be used to conduct a safety assessment of the battery under heavy impact.

[0052] To allow the height of the impact unit 2 to be adjusted according to different test requirements, the impact test apparatus may optionally include a lifting unit 3, which includes a drive component 31 and a transmission chain 32. The drive component 31 is connected to a support plate 4 inside the housing 1. In this embodiment, the support plate 4 is located near the top inside the housing 1 and is placed horizontally. The drive component 31 is mounted on the support plate 4, and its output end extends horizontally. One end of the transmission chain 32 is wound around the output end of the drive component 31, and the other end is connected to the impact unit 2. The output end of the drive component 31 can rotate along its own axial direction. That is, when the output end of the drive component 31 rotates in one direction, the transmission chain 32 can continuously wrap around the output end, so that the impact unit 2 is continuously pulled up. When the output end of the drive component 31 rotates in the opposite direction, the transmission chain 32 will continuously disengage from the output end, so that the impact unit 2 continuously moves down. The vertical height of the impact unit 2 can be controlled by adjusting the drive component 31. To ensure that the section of the transmission chain 32 connected to the impact unit 2 can extend as vertically as possible, a directional pulley can be set. The axle of the directional pulley is connected to the support plate 4. The transmission chain 32 can be fixed to extend vertically between the directional pulley and the impact unit 2 via the directional pulley. This ensures that the adjustment drive component 31 can control the upward and downward movement distance of the impact unit 2, eliminating the need to measure and verify the height of the impact unit 2.

[0053] To ensure stable movement of the counterweight 21 and the impactor 22, the impact unit 2 may optionally include a first connecting plate 23 and a second connecting plate 24, with the second connecting plate 24 connected between the first connecting plate 23 and the counterweight 21. Optionally, in this embodiment, both the first connecting plate 23 and the second connecting plate 24 are horizontally arranged, with a support frame between them. The upper end of the support frame is connected to the center of the bottom surface of the first connecting plate 23, and the lower end of the support frame has two connecting surfaces, both connected to the two sides of the top surface of the second connecting plate 24. The distance between the two connecting surfaces and the center of the second connecting plate 24 is consistent, ensuring that the second connecting plate 24 is subjected to balanced force and remains horizontal. One end of the transmission chain 32 is connected to the center of the top surface of the first connecting plate 23 to ensure that the first connecting plate 23 remains as horizontal as possible after being subjected to force.

[0054] To guide the movement of the impact unit 2, the lifting unit 3 may optionally include a guide post 33 and a first slider 34. The guide post 33 extends vertically within the housing 1. The first slider 34 is slidably mounted on the guide post 33 and is connected to the first connecting plate 23.

[0055] Optionally, two guide posts 33 are spaced apart, and two first sliders 34 are correspondingly provided. The two first sliders 34 are respectively fitted onto the two guide posts 33, and are respectively located at two through holes in the first connecting plate 23. The distance between the two through holes and the center of the first connecting plate 23 is the same. Since the distance between the two through holes is the same as the distance between the two guide posts 33, the sliding cooperation between the two sliders and the two guide posts 33 ensures that the first connecting plate 23 remains horizontal during its up-and-down movement. Ultimately, it is the impactor 22 that impacts the test piece 100.

[0056] To further improve the stability of the movement of the impact unit 2, the lifting unit 3 also includes two second sliders 35. The impact unit 2 includes two second sliders 35 connected to opposite sides of the second connecting plate 24, and the two second sliders 35 are slidably engaged with the two guide posts 33. The length of the second connecting plate 24 is adapted to the distance between the two guide posts 33, so that the second connecting plate 24 can press the two second sliders 35 against the two guide posts 33, ensuring that the second connecting plate 24 also moves in the vertical direction.

[0057] To prevent the impact unit 2 from accidentally slipping before the test is ready, optionally in this embodiment, the lifting unit 3 also includes a safety pin 36. A safety hole is provided on the side wall of the guide post 33, and the safety pin 36 is inserted into the safety hole, with a portion of the safety pin 36 protruding from the outside of the side wall of the guide post 33. When the safety pin 36 is inserted into the guide post 33, the impact unit 2 can only fall to the safety pin 36. When the test is ready, the safety pin 36 can be pulled out so that the impact unit 2 falls directly onto the test piece 100.

[0058] Optionally, there are multiple counterweights 21, which can be connected sequentially. Each counterweight 21 can be detachably connected to the impact member 22, and each counterweight 21 can be connected to the second connecting plate 24. Thus, a suitable number of counterweights 21 can be assembled as needed, and an impact member 22 with a suitable structure can be selected according to the test requirements.

[0059] Optionally, a display controller 6 is also provided on the outside of the explosion-proof door 12. The display controller 6 is connected to the drive unit 31. The display controller 6 allows the staff to input test conditions, such as test height and other parameters, and can also click a button to control the start of the test.

[0060] Optionally, a temperature sensor is installed inside the housing 1 to monitor the temperature of the test component 100 in real time, so as to ensure that staff can detect any abnormalities in the battery as soon as possible.

[0061] like Figure 6As shown, optionally, the heavy object impact test apparatus also includes a fire extinguisher, specifically a water-based fire extinguisher, which can be manually activated to extinguish the fire if the battery explodes or catches fire. Optionally, a fire extinguishing hole is provided on the housing 1, and the hose of the fire extinguisher extends into the housing 1 from the fire extinguishing hole, so that the fire extinguisher can spray extinguishing material into the housing 1 as quickly as possible.

[0062] The impact test apparatus is used in the following steps: First, open the explosion-proof lock 13 and the explosion-proof door 12. Place the battery to be tested onto the battery clamp on the load-bearing plate at the bottom of the housing 1 and secure the battery. Then, select the required impact component 22 and an appropriate number of counterweights 21 according to the test characteristics. Control the drive component 31 by operating the display controller 6 to return the impact unit 2 to its original position, i.e., above the safety pin 36, and insert the safety pin 36. Then, control the drive component 31 by operating the display controller 6 to adjust the impact unit 2 to the preset drop height. At this point, check again whether the battery to be tested is located on the battery clamp. Then, remove the safety pin 36 and close the explosion-proof door 12 and the explosion-proof lock 13. Next, turn on the lighting and ventilation, operate the display controller 6, click the start button, the drive component 31 runs, the transmission chain 32 is relaxed, and the impact unit 2 falls in free fall, impacting the battery to be tested below. After the impact is completed, the depth of the groove in the battery after the impact can be measured by a depth gauge, that is, the intrusion amount of the impacting part 22.

[0063] For example, the battery can be fixed inside the housing 1. A 10kg first impactor 221 with a hemispherical structure, along with a spare 5kg counterweight, is used to impact the bottom surface of the battery from a height of 200mm, 400mm, 600mm, 800mm, and 1000mm using a bisection method, starting from a height of 200mm, to explore the thermal runaway boundary of the battery. After each impact, the battery is left to stand for 10 minutes, and its internal resistance and voltage are measured. Additionally, the penetration depth of the first impactor 221 is recorded after each impact.

[0064] This impact testing device, based on traditional impact testing, can simulate different impact scenarios. For example, it can use impactors 22 of different shapes, adjust their height, and adjust the weight of the counterweight. It can also measure the amount of battery intrusion. This solves the problem that traditional impact testing devices, due to their non-replaceable impact heads, only simulate the impact conditions encountered by batteries in actual applications in a limited way, and cannot simulate the diverse impact scenarios batteries might encounter. Furthermore, the device uses a high-quality cold-rolled steel outer casing 11, which is insulated and fire-resistant. It is also equipped with a water-based fire extinguisher. In the event of a battery explosion or fire, the fire extinguisher can be manually activated with a single button. The explosion-proof lock 13 and explosion-proof door 12 further ensure the safety of the device.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heavy impact testing device, characterized by, include: The test piece (100) is placed inside the box (1); An impact unit (2) is disposed inside the housing (1) and located above the test piece (100). The impact unit (2) includes a counterweight (21) and an impact member (22). There are multiple impact members (22), and the shapes of the multiple impact members (22) are different. Any one of the impact members (22) can be detachably connected to the counterweight (21). The impact unit (2) can move vertically to adjust its height and impact the test piece (100).

2. The weight impact testing device of claim 1, wherein The plurality of impact members (22) includes a first impact member (221) having a first portion (2211); The first part (2211) is a conical structure, with the tip of the conical structure facing the test piece (100), or the first part (2211) is a frustum structure, with the small diameter end face of the frustum structure facing the test piece (100).

3. The weight impact testing device of claim 2, wherein, The first part (2211) is a frustum conical structure. The first impact member (221) also includes a second part (2212). The second part (2212) is connected to the small-diameter end face of the frustum conical structure. The side of the second part (2212) facing the test member (100) is provided with a spherical surface.

4. The weight impact testing device of claim 3, wherein The second part (2212) is a hemispherical structure, and the plane of the hemispherical structure is connected to the small diameter end face.

5. The weight impact testing device of claim 1, wherein The plurality of impact members (22) include a second impact member (222), the second impact member (222) having a first curved surface (2221), the first curved surface (2221) being a cylindrical sidewall, and the axial direction of the cylindrical sidewall being horizontal, the first curved surface (2221) protruding toward the test member (100).

6. The weight impact testing device of any one of claims 1-5, wherein, It also includes a lifting unit (3), which includes a driving component (31) and a transmission chain (32). The driving component (31) is connected to the support plate (4) inside the housing (1). One end of the transmission chain (32) is wound around the output end of the driving component (31), and the other end is connected to the impact unit (2). The output end of the driving component (31) can rotate along its own axis.

7. The weight impact testing device of any one of claims 1-5, wherein, It also includes a lifting unit (3), which further includes a guide post (33) and a first slider (34). The guide post (33) extends vertically inside the housing (1), and the first slider (34) is slidably sleeved on the guide post (33). The impact unit (2) includes a first connecting plate (23), and the first slider (34) is connected to the first connecting plate (23).

8. The weight impact testing device of claim 7, wherein, The guide post (33) is provided at intervals of two. The lifting unit (3) also includes two second sliders (35). The impact unit (2) includes a second connecting plate (24). The second connecting plate (24) is connected between the first connecting plate (23) and the counterweight (21). The two second sliders (35) are respectively connected to the opposite sides of the second connecting plate (24). The two second sliders (35) are slidably engaged with the two guide posts (33).

9. The weight impact testing device of claim 8, wherein, There are multiple counterweights (21), and the multiple counterweights (21) can be connected in sequence. Any counterweight (21) can be detachably connected to the impact member (22), and any counterweight (21) can be connected to the second connecting plate (24).

10. The weight impact testing device of claim 7, wherein, The lifting unit (3) also includes a safety pin (36). A safety hole is provided on the side wall of the guide column (33). The safety pin (36) is inserted into the safety hole, and part of the safety pin (36) protrudes from the outside of the side wall of the guide column (33).

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