Impact test system

Abstract

The utility model discloses an impact test system, which comprises a fixed frame, a movable trolley, a steel bar damper, an impact head, at least one group of energy absorption pipes and an impact plate, and is characterized in that the movable trolley and the fixed frame are oppositely arranged along a first direction and are arranged to be capable of moving along the first direction. The steel bar damper is installed on the fixing frame and comprises a channel extending in the first direction and multiple rows of steel bars penetrating into the channel, and the channel extends in the first direction. The impact head extends in the first direction and is connected with the end, facing the fixing frame, of the movable trolley, the impact head is aligned with the channel in the first direction, and the impact head can be inserted into the channel to abut against the steel bars along with movement of the movable trolley. And each group of energy absorption pipes comprises a plurality of energy absorption pipes and is connected to the end part of one of the fixed frame and the movable trolley. And the impact plate is connected to the fixed frame or the other end part of the movable trolley and is opposite to the energy absorption pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of impact testing, and in particular to an impact testing system. Background Art

[0002] With the rapid development of the new energy industry, the production and sales of new energy vehicles are growing rapidly, and the electrical safety of new energy vehicles is receiving more and more attention. In the power battery collision test, it is necessary to simulate the entire vehicle use scenario as much as possible to achieve a simulation that is close to the actual situation. The test scenarios include experimental impact, extrusion, obstacle impact, bottom scratch and other contact tests, which examine the ability of internal modules, battery cells, high-voltage components, etc. to resist extrusion and puncture when the shell of the new energy battery is deformed due to external forces. In addition, the test conditions also include non-contact tests such as vibration and simulated collision, which examine the strength of the new energy battery mounting point and the impact resistance of the internal modules, battery cells, high-voltage components, etc. of the new energy battery.

[0003] At present, new energy battery simulation collision tests generally use acceleration trolleys for testing. However, the weight of the new energy batteries of some models plus their fixing fixtures can reach 2 tons or even higher. The experimental simulated collision energy is very large and has exceeded the thrust of the acceleration trolley. Therefore, the existing acceleration trolleys can no longer meet the test requirements. Summary of the invention

[0004] The object of the present invention is to provide a collision test system to solve the problems of the prior art.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a collision test system, comprising:

[0006] Fixed frame;

[0007] A mobile trolley, the mobile trolley is arranged opposite to the fixed frame along a first direction and is arranged to be movable along the first direction;

[0008] A steel bar damper, the steel bar damper is mounted on the fixing frame and comprises a channel extending along a first direction and a plurality of rows of steel bars inserted into the channel, the channel extending along the first direction;

[0009] an impact head, the impact head extending along the first direction and connected to one end of the mobile trolley facing the fixed frame, the impact head being aligned with the channel along the first direction and being configured to be inserted into the channel to press against the multiple rows of steel bars as the mobile trolley moves;

[0010] At least one group of energy absorbing tube groups and one impact plate, the energy absorbing tube group is connected to one of the fixed frame and the mobile trolley, and the impact plate is connected to the other of the fixed frame and the mobile trolley; the impact plate is arranged opposite to the energy absorbing tube group and is configured to impact the energy absorbing tube group.

[0011] In one embodiment, the steel bar damper comprises:

[0012] At least two groups of damping pins, the two groups of damping pins are arranged opposite to each other along the second direction and form the channel, each group of damping pins includes at least two rows of damping pins arranged along the second direction, the two rows of damping pins are respectively located on both sides of the channel along the second direction, and the second direction is perpendicular to the first direction;

[0013] at least two movable plates, the two movable plates extending along the first direction and being arranged to be movable along the first direction, each of the movable plates being arranged between two rows of the damping pins of each group of the damping pins;

[0014] at least two rows of movable pins, each row of movable pins being connected to each of the movable plates;

[0015] The plurality of steel bars extend along the second direction and are respectively inserted between two adjacent damping pins in each row of the damping pins, the channel, and between two adjacent movable pins in each row of the movable pins.

[0016] In one embodiment, the impact test system further comprises at least one group of convex strips, each group of the convex strips being connected to a side of the impact plate opposite to the energy absorbing tube and comprising a plurality of the convex strips arranged crosswise.

[0017] In one embodiment, the intersection point of any two convex strips is aligned with the axis of one of the energy absorbing tubes along the first direction.

[0018] In one embodiment, a plurality of the convex strips form a cross shape.

[0019] In one embodiment, two groups of energy absorbing tubes are respectively arranged on both sides of the channel along the second direction and connected to a side of the fixing frame facing the moving trolley, and the second direction is perpendicular to the first direction;

[0020] The two impact plates are respectively connected to one end of the mobile trolley facing the fixed frame and are located on both sides of the impact head along the second direction, and are aligned with the two groups of energy absorbing tubes along the first direction;

[0021] In one embodiment, the two groups of convex strips are respectively connected to one side of the two impact plates facing the energy absorbing tube.

[0022] The two groups of energy absorbing tubes are respectively arranged on both sides of the channel along the second direction and connected to a surface of the fixing frame facing the moving trolley, and the second direction is perpendicular to the first direction;

[0023] The impact plate and one end of the movable trolley facing the fixed frame are aligned with the two groups of energy absorbing tubes along the first direction;

[0024] The impact head is connected to the impact plate;

[0025] The two groups of convex strips are respectively connected to one side of the two impact plates facing the energy absorbing tube.

[0026] In one embodiment, the impact test system further includes a mounting frame, which is connected to one end of the fixing frame facing the moving trolley and is provided with a plurality of mounting holes, and the plurality of energy absorbing tubes are respectively detachably mounted in the mounting holes.

[0027] In one embodiment, the impact testing system further comprises:

[0028] a cover plate, the cover plate being detachably connected to the top of the fixing frame; and

[0029] A driving member connected to the cover plate;

[0030] The bottom end of the damping pin is connected to the fixing frame, and the top end is fixedly connected to the cover plate.

[0031] In one embodiment, the cover plate is provided with at least two movable holes extending along the first direction;

[0032] The bottom of each row of movable pins is connected to the movable plate, and the top is located in each movable hole respectively. A limiting piece is provided at the top of the movable pin. The limiting piece is located on the top surface of the cover plate and is used to limit the movable pin from leaving the movable hole.

[0033] In one embodiment, the impact test system further includes a base, the base being located at the bottom end of the fixing frame and being used to support the fixing frame;

[0034] At least one group of the energy absorbing tubes is connected to the front end of the base.

[0035] In one embodiment, the distance from the impact head to a steel bar located at the front end of the plurality of steel bars is the same as the distance from the energy absorbing tube to the convex strip.

[0036] In one embodiment, the mobile trolley comprises:

[0037] a movable frame, the movable frame being configured to be movable along the first direction;

[0038] a main table top connected to a top surface of the mobile frame; and

[0039] at least one auxiliary table top, the auxiliary table top being detachably connected to the outer side of the main table top;

[0040] The impact head is connected to one end of the moving frame facing the energy absorbing tube.

[0041] In one embodiment, an end of the impact head away from the moving trolley is provided with a C-shaped bayonet opening away from the moving trolley.

[0042] In one embodiment, the cover plate is provided with a plurality of rows of perforations;

[0043] The multiple rows of damping pins in each group of damping pins are respectively located in each row of through holes, and the top ends of the damping pins are located on the top surface of the cover plate and have outer diameters greater than inner diameters of the through holes.

[0044] In one embodiment, the impact testing system further comprises:

[0045] A box body, the box body comprising a base and a top cover, the base being connected to the top surface of the mobile trolley, and the top cover covering the top surface of the base;

[0046] A data acquisition system is used to collect new energy battery impact test data and is installed in the box body.

[0047] The present invention arranges a damping pin, a movable pin and a steel bar to absorb the energy of the impact head, and configures an energy-absorbing tube and an impact plate to further enhance the absorption of the kinetic energy of the mobile trolley, which can withstand a larger impact force to meet the impact test requirements of new energy batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a perspective view of an impact testing system according to an embodiment of the present invention.

[0049] Figure 2 , Figure 3 and Figure 4 They are Figure 1 A perspective view of the impact test system without the cover plate in the illustrated embodiment.

[0050] Figure numerals: 10, impact test system; 1, fixed frame; 11, mounting frame; 12, limiter; 14, cover plate; 141, moving hole; 15, channel; 16, base; 2, moving trolley; 21, impact head; 22, C-shaped bayonet; 23, moving frame; 24, main table; 25, auxiliary table; 3, damping pin; 4, movable plate; 41, avoidance hole; 5, movable pin; 51, limiter; 6, steel bar; 7, energy absorbing tube; 8, impact plate; 81, convex strip; 9, hydraulic cylinder; DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the claims of the present application can be implemented.

[0052] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0053] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0054] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0055] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0056] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0057] The present invention relates to an impact test system 10, which is mainly used for new energy battery impact testing, and can certainly also be used for other high-G value impact tests. The impact test system 10 can withstand greater impact energy and meet testing requirements.

[0058] Specifically, Figure 1-4As shown, the impact test system 10 includes a fixed frame 1, a steel bar damper, at least one set of energy absorbing tubes and a moving trolley 2.

[0059] The fixing frame 1 is used to fix and install two sets of damping pins 3. Figure 1-4 In the embodiment shown, the fixing frame 1 has a support plate, which is plate-shaped and extends along a first direction, which is the length direction of the fixing frame 1 and also the moving direction of the moving trolley 2. The top surface of the fixing frame 1 is provided with a plurality of insertion holes for installing two sets of damping pins 3.

[0060] The steel bar damper comprises two groups of damping pins 3 , two movable plates 4 , two rows of movable pins 5 and a plurality of steel bars 6 .

[0061] The two groups of damping pins 3 are arranged at intervals along the second direction and form a channel 15 extending along the first direction. The channel 15 extends along the first direction and passes through both ends of the steel damper along the first direction. That is, the channel 15 is open toward the end facing the mobile trolley 2, which facilitates the insertion of the impact head 21 of the mobile trolley 2. Each group of damping pins 3 includes two rows of damping pins 3 arranged at intervals along the second direction, and each row of damping pins 3 has a plurality of damping pins 3 arranged at intervals along the first direction. The bottom ends of the two groups of damping pins 3 are respectively inserted into the insertion holes of the fixing frame 1. The second direction is the width direction of the fixing frame 1, which is perpendicular to the first direction.

[0062] The two movable plates 4 are respectively located on the top surface of the fixing frame 1 and are movably connected to the fixing frame 1. Figure 2 As shown, two groups of stoppers 12 are provided on the top surface of the fixing frame 1, and the two groups of stoppers 12 are respectively arranged opposite to each other along the second direction, and each group of stoppers 12 includes two stoppers 12 arranged opposite to each other along the first direction, and the two stoppers 12 of each group of stoppers 12 are respectively arranged opposite to the two ends of each group of damping pins 3 along the first direction. Each stopper 12 is provided with a stopper hole.

[0063] The two movable plates 4 extend respectively along the first direction and are respectively located between the two rows of damping pins 3 of each group of damping pins 3. Both ends of each movable plate 4 along the first direction are respectively located in the limiting holes of each group of limiting members 12 and can move along the first direction in the limiting holes. The two limiting members 12 can prevent the limiting plates from tilting.

[0064] The two rows of movable pins 5 respectively include a plurality of movable pins 5 arranged at intervals along the first direction, the two rows of movable pins 5 are respectively connected to the two movable plates 4, and are located between the two rows of damping pins 3 of each group of damping pins 3, and the plurality of movable pins 5 of the two rows of movable pins 5 are respectively aligned with the plurality of damping pins 3 of each row of damping pins 3 along the second direction, that is, the interval between two adjacent movable pins 5 in each row of movable pins 5 is the same as the interval between two adjacent damping pins 3 in each row of damping pins 3.

[0065] exist Figure 1-4 In the illustrated embodiment, each of the movable plates 4 is provided with an avoidance hole 41 and a row of through holes communicating with the avoidance hole 41, the through holes being formed by the top surface of the movable plate 4 being recessed into the avoidance hole 41. The avoidance hole 41 extends along a first direction and penetrates the movable plate 4 along a second direction. The bottom wall of the avoidance hole is provided with a row of accommodating holes (not shown in the figure), the bottom end of each row of movable pins 5 is located in the accommodating space of the bottom wall of the avoidance hole 41, and the top end extends from the avoidance hole, the plurality of through holes to the movable hole of the cover plate to the top surface of the cover plate, which will be described in detail below.

[0066] That is to say, the bottom of the movable pin 5 is connected to the movable plate 4 and a part of it is located in the avoidance hole 41 . The avoidance hole 41 is used to avoid the steel bars 6 , that is, the steel bars 6 can pass through between adjacent movable pins 5 .

[0067] The plurality of steel bars 6 extend respectively along the second direction, and each steel bar 6 can be inserted between two adjacent damping pins 3 of each row of damping pins 3 of the two groups of damping pins 3, and between the channel 15 and two adjacent movable pins 5 of each row of movable pins 5. After the steel bars 6 are inserted between two adjacent damping pins 3 of each row of damping pins 3, and between the channel 15 and two adjacent movable pins 5 of each row of movable pins 5, the movable plate 4 is driven to move along the first direction to drive the damping pin 3 to move, so that the steel bars 6 can be bent and form a W shape after the damping pin 3 moves.

[0068] exist Figure 1-4 In the embodiment shown, two sets of energy absorbing tubes are respectively connected to the front end of the fixing frame 1, that is, located at one end close to the moving trolley 2, and the two sets of energy absorbing tubes are respectively located on both sides of the channel along the second direction. It should be understood that in other embodiments, only one set of energy absorbing tubes may be provided, and the set of energy absorbing tubes may be provided at the front end of the fixing frame 1.

[0069] Each energy absorbing tube group includes a plurality of energy absorbing tubes 7, which are respectively connected to the front end of the fixed frame 1 along the first direction, that is, located at the end facing the mobile trolley 2, for absorbing the energy of the mobile trolley 2. Specifically, the energy absorbing tube 7 is a steel tube extending along the first direction and having a certain hardness, and one end is connected to the fixed frame 1, and the other end can be bent and deformed after being hit by the mobile trolley 2, thereby preventing the mobile trolley 2 from moving, so that the mobile trolley 2 stops moving quickly, and absorbs the kinetic energy of the mobile trolley 2.

[0070] The mobile trolley 2 is located at one end of the fixed frame 1 where the energy absorbing tube 7 is provided and can move along the first direction. Two impact plates 8 are provided at one end of the mobile trolley 2 and are arranged opposite to the energy absorbing tube 7. Each impact plate 8 is respectively aligned with each group of energy absorbing tubes and is provided with a group of convex strips 81. The group of convex strips 81 includes a plurality of cross-arranged convex strips 81, and the intersection of each two cross-arranged convex strips 81 is aligned with the axis of each energy absorbing tube 7. When the mobile trolley 2 moves to the preset position, the impact head 21 impacts the steel bar 6 of the steel bar damper, and the impact plate 8 preferably impacts the energy absorbing tube 7. The plurality of convex strips 81 pre-contact the energy absorbing tube 7 before the impact plate 8 impacts the energy absorbing tube 7, guides the energy absorbing tube 7 to bend, and prevents the energy absorbing tube 7 from directly contacting the flat impact plate 8 and breaking.

[0071] In some embodiments, the convex strips 81 may not be provided, and the impact plate 8 may directly impact the energy absorbing tube 7. Optionally, the intersection of the two convex strips may also be arranged to be offset to a certain extent from the axis of each energy absorbing tube 7. Preferably, the intersection of the two convex strips 81 is aligned with the axis of each energy absorbing tube 7.

[0072] Optionally, in some embodiments, the weight of the test piece is relatively small, and only one set of energy absorbing tubes and one impact plate 8 may be provided, the energy absorbing tube set may be connected to the end of the mobile trolley 2 facing the fixed frame 1, and the impact plate 8 may be connected to the end of the fixed frame 1 facing the mobile trolley 2 and aligned with the energy absorbing tube 7 along the first direction. Of course, the energy absorbing tube 7 may also be provided at the end of the fixed frame 1 facing the mobile trolley 1, and the impact plate 8 may be connected to the end of the mobile trolley 2 facing the fixed frame 1 and aligned with the energy absorbing tube 7 along the first direction, that is, the energy absorbing tube 7 and the impact plate 8 may be provided in a transposed position.

[0073] Of course, in some embodiments, when the mobile trolley 2 moves to the preset position, the impact head 21 first impacts the steel bar 6 for a certain period of time, for example, 1s or 2s later, and then the impact plate 8 impacts the energy absorbing tube 7. Of course, as a preferred solution, the distance from the impact head 21 to a steel bar 6 near the front end of the plurality of steel bars 6 is the same as the distance from the convex strip 81 to the energy absorbing tube 7, that is, when the impact head 21 impacts the steel bar 6, the impact plate 8 impacts the energy absorbing tube 7, and both are performed simultaneously, which can absorb the kinetic energy of the mobile trolley 2 to the maximum extent.

[0074] The steel bar 6 is inserted into two adjacent damping pins 3. The position of the steel bar 6 can be adjusted according to the weight of the test piece or different requirements. For example, the steel bar 6 can be moved toward the moving trolley 2 by one or several rows of damping pins 3. When impacting, the impact head 21 impacts the steel bar 6, and then the impact plate 8 impacts the energy absorbing tube 7. The position of the steel bar 6 is set according to the requirements, and the priority order of the impact plate 8 impacting the energy absorbing tube 7 and the impact head 21 impacting the steel bar 6 can be adjusted.

[0075] In the prior art, the energy of the mobile trolley 2 is absorbed by a steel bar damper. However, the steel bar has a certain toughness and insufficient rigidity, and its energy absorption is limited. Generally, it can absorb the kinetic energy of a battery pack weighing several hundred kilograms. If the weight of the new energy battery is increased, the kinetic energy absorbed by the steel bar damper can generally be provided by increasing the number of steel bars. However, as the power demand of new energy vehicles for batteries increases, the weight of the battery pack increases. When the weight of the new energy battery being tested increases to a certain extent, for example, the weight of the battery pack and the total weight of the mobile trolley increase to more than 2 tons, even if the number of steel bars is increased, the steel bar damper is far from meeting the demand.

[0076] The present invention uses the energy absorbing tube 7 and the steel bar damper in combination. The energy absorbing tube 7 has strong rigidity, while the steel bar has strong toughness. The combination of the two can meet the test requirements of large pulse width and high G value, and can absorb impact tests with a weight of more than 20,000 tons.

[0077] The impact head 21 is arranged at one end of the mobile trolley 2 facing the energy absorbing tube 7. The impact head 21 is tubular and extends in the first direction. As the mobile trolley 2 approaches the fixed frame 1, the impact head 21 can be inserted into the channel 15 of the steel bar damper, that is, inserted between the two groups of damping pins 3, and hit multiple steel bars 6. Before the mobile trolley 2 is started, the multiple steel bars 6 have been pulled into a W shape by the movable plate 4 and the movable pin 5, and the part thereof in the channel 15 protrudes toward the front end, that is, close to one end of the energy absorbing tube 7. After the impact head 21 is inserted into the channel 15, it will hit this part of the steel bars 6, and the steel bars 6 will bend and deform again after being hit. Since the steel bars 6 have been bent and deformed between the two groups of damping pins 3 and the movable pin 5, when the impact head 21 hits the steel bars 6, the steel bars 6 can prevent the movement of the impact head 21.

[0078] The end of the impact head 21 away from the mobile trolley 2 is provided with a C-shaped bayonet 22 that is open toward the mobile trolley 2, and the C-shaped bayonet 22 is open toward both sides of the second direction. After the impact head 21 rushes into the channel 15, the C-shaped bayonet 22 of the impact head 21 can grab the steel bars 6, apply force to the multiple steel bars 6, and prevent the steel bars 6 from escaping from the impact head 21, thereby helping the impact head 21 to stop moving quickly.

[0079] Optionally, the impact test system 10 further comprises a mounting frame 11, which is connected to one end of the fixed frame 1 facing the mobile trolley 2 and is provided with a plurality of mounting holes, and the plurality of energy absorbing tubes 7 of each energy absorbing tube group are respectively detachably mounted in the mounting holes. When the energy absorbing tube 7 needs to be replaced, the energy absorbing tube 7 can be directly removed and replaced.

[0080] exist Figure 1-4In the illustrated embodiment, two mounting frames 11 are respectively mounted on both sides of the channel 15 and are detachably connected to the fixing frame 1, for example, by bolts. Two impact plates 8 are respectively mounted on both sides of the impact head 21, and are respectively arranged opposite to the two mounting frames 11. Each impact plate 8 is respectively provided with multiple rows and columns of crossed convex strips 81, i.e., in a cross shape, and the intersection of each row and column of convex strips 81 is respectively aligned with the axis of each energy absorbing tube 7.

[0081] Each mounting frame 11 has multiple rows of mounting holes, and each row of mounting holes can be set to different shapes to install energy absorbing tubes 7 of different diameters. The energy absorbing tube 7 can be directly inserted into the mounting hole to have an interference fit with the mounting hole.

[0082] exist Figure 1-4 In the embodiment shown, a strike plate 11 is connected to one end of the mobile trolley 2 facing the fixed frame 1, and two groups of convex strips 81 are arranged at intervals along the second direction on the side of the strike plate 11 facing the fixed frame 1, and the two groups of convex strips 81 are respectively aligned with the two groups of energy absorbing tube groups, and preferably, each cross point of the two groups of convex strips 81 is respectively aligned with the axis of each energy absorbing tube 7 of the two groups of energy absorbing tube groups. The impact head 21 is connected to the side of the strike plate 11 facing the fixed frame 1 and is located between the two groups of convex strips 81.

[0083] The impact test system 10 also includes a cover plate 14, which is located on the top of the two groups of damping pins 3 and is detachably connected to the top of the fixing frame 1. The bottom end of the damping pin 3 is connected to the fixing frame 1, and the top end is connected to the cover plate 14. A driving member is also provided at the top of the cover plate 14, and the driving member is connected to the cover plate 14. The driving member is also connected to an external fixing bracket or other equipment. When the driving member moves, it can drive the cover plate 14 to detach from the fixing frame 1, thereby driving the damping pin 3 to detach from the fixing frame 1. Figure 1 In the illustrated embodiment, the driving member is a hydraulic cylinder 91 , but in other embodiments, an electric motor may also be used.

[0084] exist Figure 1 In the illustrated embodiment, the cover plate 14 is provided with a plurality of rows of through holes, and the plurality of rows of damping pins 3 of each group of the damping pins are respectively located in each row of the through holes, that is, the through holes are roughly circular holes, each damping pin 3 is located in each through hole and the top end of each damping pin 3 protrudes from the top surface of the cover plate 14, and the outer diameter of the top end of each damping pin 3 is larger than the inner diameter of the through hole, that is, when the hydraulic cylinder 91 drives the cover plate 14 to move upward, it can carry the damping pin 3 to move upward together and thus detach from the fixing frame 1.

[0085] In addition, the cover plate 14 is provided with at least two movable holes 141 extending along the first direction, and the top ends of the movable pins 5 in each row respectively pass through the same movable hole 141 and extend beyond the top surface of the cover plate 14, and the movable pins 5 in each row can move in the movable hole 141 along the first direction. In addition, a limiter 51 is provided at the top end of each movable pin 5, and the limiter 51 is located on the top surface of the cover plate 14 to limit the movable pin 5 from being separated from the movable hole 141. When the hydraulic cylinder 91 of the cover plate 14 is driven to move upward, the movable pins 5 can be separated from the movable plate 4 in the vertical direction.

[0086] In the prior art, after each test, the damping pin and the movable pin need to be removed manually, and then the steel bar in the steel bar damper is taken out. Since the steel bar is closely matched with the damping pin and the movable pin after being hit, it is very difficult to manually pull out the damping pin or the movable pin. However, the present invention provides a cover plate, and connects the cover plate with the movable pin and the damping pin, and removes the damping pin and the movable pin through the hydraulic cylinder 91, saving manpower.

[0087] In addition, in order to drive the movable plate 4 to move, another hydraulic cylinder 92 is also provided at one end of the fixing frame 1 away from the energy absorbing tube 7. The hydraulic cylinder 92 is connected to the movable plate 4 and can drive the movable plate 4 to move along the first direction.

[0088] The impact test system also includes two bases 16, which are in the shape of an "I" and are located at the bottom end of the fixed frame 1. The two bases 16 are respectively connected to the fixed frame 1 and are located on both sides of the fixed frame 1 along the second direction, and are used to support the fixed frame 1. In addition, a group of energy-absorbing tube groups (not shown) are also provided at the front end of the base 16, and the energy-absorbing tube group can also be used to impact the mobile trolley 2. Preferably, the front end of the mobile trolley 2 is provided with another impact plate, which is aligned with the energy-absorbing tube of the base 16 and is used to impact the energy-absorbing tube of the base 16. That is to say, while the impact head 21 impacts the steel bar 6, a part of the impact plate 8 at the front end of the mobile trolley 2 impacts the energy-absorbing tube 7 at the front end of the fixed frame 1, and another part of the impact plate impacts the energy-absorbing tube at the front end of the base 16.

[0089] In addition, the mobile trolley includes a mobile frame 23, a main table 24 and an auxiliary table 25, wherein the mobile frame 23 is configured to be movable along the first direction for supporting the main table, and the impact head 21 and the impact plate are respectively connected to the mobile frame 23 and the end of the main table 24 facing the energy absorbing tube, or the impact head can be connected alone to the end of the mobile frame 23 facing the energy absorbing tube. The main table is connected to the top surface of the mobile frame, and the auxiliary table can be detachably connected to the outer side of the main table. Figure 1-4In the embodiment shown, two auxiliary countertops are respectively installed on both sides of the mobile frame and the main countertop along the second direction by bolts, which can increase the width of the overall countertop. In other embodiments, the auxiliary countertops can also be installed at the front and rear ends of the mobile frame or the main countertop to increase the length of the overall countertop. Optionally, the auxiliary countertop 25 can also be directly connected to both sides or both ends of the main countertop 24. The present invention does not limit the specific connection method of the auxiliary countertop 25 and the main countertop 24 or the mobile frame 23, as long as the area supporting the new energy battery can be increased.

[0090] The larger the weight and volume of existing new energy batteries, the greater the width or length of the table supporting the battery can be to make it suitable for a variety of battery tests.

[0091] The impact test system 10 also includes a box body and a data acquisition system (not shown in the figure). The box body is made of stainless steel and includes a base and a top cover. The base is connected to the top surface of the mobile trolley 2, and the top cover is covered on the top surface of the base. The data acquisition system is used to collect the impact test data of the new energy battery and is installed in the box body. After the new energy battery test, in order to collect the test data of the new energy battery, it is generally necessary to install the data acquisition system on the mobile trolley 2. However, after the new energy battery is hit quickly, it is very easy to cause the new energy battery to catch fire, and the fire will damage the data acquisition system. When water is used to extinguish the fire, water will also be sprayed onto the data acquisition system, further damaging the data acquisition system. The present invention places the data acquisition system in the box body, and the box body is made of stainless steel and has a certain sealing property, which can prevent damage by fire or water. Optionally, in order to prevent water from entering the box body, a drainage hole can be set in the base. Preferably, the box body and the base are sealed. Optionally, the box body is made of ceramic material. Optionally, the box body is installed at one end away from the impact head 21.

[0092] The present invention arranges a damping pin, a movable pin and a steel bar to absorb the energy of the impact head, and configures an energy absorbing tube and an impact plate to further enhance the absorption of the kinetic energy of the mobile trolley, which can withstand a larger impact force to meet the test requirements.

[0093] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0094] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0095] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A collision test system, characterized in that: include: Fixed frame; A mobile trolley, the mobile trolley is arranged opposite to the fixed frame along a first direction and is arranged to be movable along the first direction; A steel bar damper, the steel bar damper is mounted on the fixing frame and comprises a channel extending along a first direction and a plurality of rows of steel bars inserted into the channel, the channel extending along the first direction; an impact head, the impact head extending along the first direction and connected to one end of the mobile trolley facing the fixed frame, the impact head being aligned with the channel along the first direction and being configured to be inserted into the channel to press against the multiple rows of steel bars as the mobile trolley moves; At least one group of energy absorbing tube groups and one impact plate, the energy absorbing tube group is connected to one of the fixed frame and the mobile trolley, and the impact plate is connected to the other of the fixed frame and the mobile trolley; the impact plate is arranged opposite to the energy absorbing tube group and is configured to impact the energy absorbing tube group.

2. The impact test system according to claim 1, characterized in that: The steel bar damper comprises: At least two groups of damping pins, the two groups of damping pins are arranged opposite to each other along the second direction and form the channel, each group of damping pins includes at least two rows of damping pins arranged along the second direction, the two rows of damping pins are respectively located on both sides of the channel along the second direction, and the second direction is perpendicular to the first direction; at least two movable plates, the two movable plates extending along the first direction and being arranged to be movable along the first direction, each of the movable plates being arranged between two rows of the damping pins of each group of the damping pins; at least two rows of movable pins, each row of movable pins being connected to each of the movable plates; The plurality of steel bars extend along the second direction and are respectively inserted between two adjacent damping pins in each row of the damping pins, the channel, and between two adjacent movable pins in each row of the movable pins.

3. The impact test system according to claim 1, characterized in that: The impact test system further comprises at least one group of convex strips, each group of the convex strips being connected to a side of the impact plate opposite to the energy absorbing tube and comprising a plurality of the convex strips arranged crosswise.

4. The impact test system according to claim 3, characterized in that: The intersection point of any two convex strips is aligned with the axis of one of the energy absorbing tubes along the first direction.

5. The impact test system according to claim 3, characterized in that: The plurality of convex strips form a cross shape.

6. The impact test system according to claim 3, characterized in that: The two groups of energy absorbing tubes are respectively arranged on both sides of the channel along the second direction and connected to a surface of the fixing frame facing the moving trolley, and the second direction is perpendicular to the first direction; The two impact plates are respectively connected to one end of the mobile trolley facing the fixed frame and are located on both sides of the impact head along the second direction, and are aligned with the two groups of energy absorbing tubes along the first direction; The two groups of convex strips are respectively connected to one side of the two impact plates facing the energy absorbing tube.

7. The impact testing system according to claim 3, characterized in that: The two groups of energy absorbing tubes are respectively arranged on both sides of the channel along the second direction and connected to a surface of the fixing frame facing the moving trolley, and the second direction is perpendicular to the first direction; The impact plate and one end of the movable trolley facing the fixed frame are aligned with the two groups of energy absorbing tubes along the first direction; The impact head is connected to the impact plate; The two groups of convex strips are respectively connected to one side of the two impact plates facing the energy absorbing tube.

8. The impact testing system according to claim 1, characterized in that: The impact test system further comprises a mounting frame, which is connected to one end of the fixing frame facing the moving trolley and is provided with a plurality of mounting holes, and the plurality of energy absorbing tubes are respectively detachably mounted in the mounting holes.

9. The impact testing system according to claim 2, characterized in that: The impact testing system further comprises: a cover plate, the cover plate being detachably connected to the top of the fixing frame; and A driving member connected to the cover plate; The bottom end of the damping pin is connected to the fixing frame, and the top end is fixedly connected to the cover plate.

10. The impact test system according to claim 9, characterized in that: The cover plate is provided with at least two movable holes extending along the first direction; The bottom of each row of movable pins is connected to the movable plate, and the top is located in each movable hole respectively. A limiting piece is provided at the top of the movable pin. The limiting piece is located on the top surface of the cover plate and is used to limit the movable pin from leaving the movable hole.

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