Linear impact device and linear impact system for impact test of power storage battery

Abstract

The utility model discloses a linear impact device and a linear impact system for a power storage battery impact test. According to the linear impact device, the movable trolley is used for moving along a track; the guide base is fixed on the top surface of the movable trolley; the impact block is slidably connected with the guide rail; the driving part comprises a traction rope, a driving motor and a tractor pulled by the traction rope; the traction vehicle is used for clamping or loosening the traction rope; the traction vehicle is used for pushing the movable trolley to move when being pulled by the traction rope to move towards the to-be-detected sample; after the moving trolley is pushed by the tractor for a preset distance, the tractor loosens the traction rope and disengages from the moving trolley; when the moving trolley stops, the impact block moves towards the to-be-tested sample along the guide rail under the inertia effect, and the head of the impact block is used for rushing out of the moving trolley to impact the to-be-tested sample. And the energy required by the impact damage test of the power storage battery can be met.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, and in particular to a linear impact device and a linear impact system for a power battery impact test. Background Art

[0002] With the rapid development of my country's new energy vehicle 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. The battery pack of new energy vehicles is affected by external forces such as impact and shock, which causes the battery pack shell to deform, leading to internal thermal runaway, thus causing explosions, fires, and explosions of new energy vehicles. It is very necessary to test the ultimate impact resistance and deformation resistance of power batteries.

[0003] For the power battery impact test, the electric linear impact system currently used is composed of an electromagnetic launch system, a launcher, a guide moving frame, a braking mechanism, etc. Before the test, the impact block is fixed to the front end of the guide moving frame. During the test, the electromagnetic launch system sends out the launcher, which pushes the guide moving frame to be quickly pushed out along the track. When the moving speed of the guide moving frame reaches the test target speed, the launcher brakes instantly, and the guide moving frame with the impact block slides freely and impacts the fixed sample.

[0004] The power battery impact test is a destructive test method. During the test, a high impact energy needs to be provided by the equipment. The mass of the impact block is constant, and the impact speed needs to be increased in steps until the failure point of the sample is detected, such as leakage, fire, explosion, etc. The existing electric linear impact equipment has a limited maximum power of the motor and cannot meet the high-quality and high-speed impact energy requirements. If the motor power is increased, the manufacturing cost of the equipment will be high and the development cycle will be long. Utility Model Content

[0005] The utility model aims to provide a linear impact device and a linear impact system for a power battery impact test, so as to meet the energy required for the power battery impact destruction test.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a linear impact device for power battery impact test, the linear impact device moves along a track, and the track extends toward the direction of the sample to be tested; the linear impact device includes:

[0007] A mobile trolley, the mobile trolley moves along the track;

[0008] A guide base, the guide base is fixed to the top surface of the mobile trolley, and the guide base is provided with a guide rail extending along the track direction;

[0009] An impact block, the impact block is slidably connected to the guide rail;

[0010] A driving member, the driving member comprising: a traction rope, a driving motor driving the traction rope to move along the extension direction of the track, and a traction vehicle towed by the traction rope; the traction vehicle is used to clamp or release the traction rope;

[0011] Wherein, the tractor is used to push the mobile trolley to move when it is pulled by the traction rope and moves toward the direction of the sample to be tested; after the mobile trolley is pushed by the tractor for a preset distance, the tractor releases the traction rope and disengages from it; when the mobile trolley stops, the impact block moves along the guide rail toward the direction of the sample to be tested under the action of inertia, and the head of the impact block is used to rush out of the mobile trolley and hit the sample to be tested.

[0012] Compared with the prior art, the implementation mode of the utility model adopts a driving motor to drive the traction rope. After the traction rope pulls the traction vehicle, the traction vehicle can move along the track to reach a sufficiently fast speed, and also pushes the mobile trolley to the speed required by the test. After the mobile trolley moves at a high speed, it brakes and slows down. Relying on the inertia, the impact block can slide freely, and the impact block impacts the sample to be tested. Therefore, by configuring the traction rope and the traction vehicle, the capacity of the linear impact device is improved, and the high quality and high speed requirements of the impact block can be met.

[0013] In one embodiment, a baffle for the tractor to collide with is provided on the side of the mobile trolley facing away from the sample to be tested.

[0014] In one embodiment, the baffle is an elastic member; and the traction rope is a steel wire rope.

[0015] In one embodiment, the tractor comprises: a vehicle body, and a clamping member arranged on the vehicle body; the clamping member is used to clamp or release the traction rope.

[0016] In one embodiment, the clamping member comprises:

[0017] A driving handle, the driving handle comprising: a handle body rotatably connected to the vehicle body, and an elliptical cam eccentrically connected to the handle body and driven to rotate by the handle body;

[0018] A first clamping plate; the first clamping plate is fixed to the vehicle body; and

[0019] A second clamping plate, the second clamping plate and the first clamping plate are arranged opposite to each other in a direction perpendicular to the moving direction of the vehicle body, and the second clamping plate is movably connected to the vehicle body; the second clamping plate is used to be pushed by the elliptical cam to move toward the first clamping plate, and cooperate with the first clamping plate to clamp the traction rope;

[0020] When the elliptical cam is located at the clamping position, the second clamping plate is clamped and positioned between the first clamping plate and the elliptical cam; when the elliptical cam is located at the loosening position, the second clamping plate and the first clamping plate release the traction rope.

[0021] In one embodiment, the first clamping plate has a first clamping surface facing the second clamping plate; the second clamping plate has a second clamping surface facing the first clamping plate;

[0022] At least parts of the first clamping surface and the second clamping surface are toothed surfaces that fit together.

[0023] In one embodiment, when the elliptical cam is located at the clamping position, the handle body extends outside the vehicle body;

[0024] A driving block is arranged on the track; the driving block is used to push the handle body to rotate, and the rotation of the handle body drives the elliptical cam to rotate, so that the elliptical cam is located in the released position.

[0025] In one embodiment, the impact block comprises: a movable slider slidably connected to the guide rail, a mounting panel connected to the movable slider, and an impact block body detachably connected to the mounting panel;

[0026] The guide base is provided with a pair of limit stops arranged at both ends of the guide rail; the movable sliding block is slidably located between the pair of limit stops; and the impact block body is used to move outside the extension direction of the guide rail under inertia.

[0027] In one embodiment, the traction rope is looped in the track.

[0028] The embodiment of the utility model provides a linear impact system for power battery impact test, comprising:

[0029] A linear impact device as described in any one of the above, the linear impact device comprises: an impact head arranged at the front end of the moving trolley;

[0030] A damping device is arranged at the front end of the track and is used to lock the moving trolley; the damping device has a cavity for inserting the impact head. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of a linear impact device according to an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of the structure of a linear impact device punching into a damping device according to an embodiment of the utility model;

[0033] Figure 3It is a structural schematic diagram of a tractor according to an embodiment of the utility model;

[0034] Figure 4 It is a structural schematic diagram of a tractor clamping a traction rope according to an embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of a tractor releasing a traction rope according to an embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of the structure of the first clamping plate, the second clamping plate and the mounting plate in accordance with an embodiment of the utility model;

[0037] Figure 7 It is a schematic diagram of the structure of the impact head according to one embodiment of the utility model;

[0038] Figure 8 It is a schematic diagram of the structure of the first mounting groove in the impact head according to one embodiment of the utility model;

[0039] Fig. 9 It is a schematic diagram of the structure of the second mounting groove in the impact head according to one embodiment of the utility model;

[0040] Fig.10 It is a structural schematic diagram of a tractor damping device according to one embodiment of the utility model;

[0041] Fig.11 It is a structural schematic diagram of a tractor damping device without a top plate according to an embodiment of the utility model;

[0042] Fig.12 It is a structural schematic diagram of a limiter of a damping device according to an embodiment of the utility model;

[0043] Fig.13 It is a schematic diagram of the structure of the impact head and the damping device in cooperation with each other according to one embodiment of the utility model;

[0044] Among them, 100, linear impact device; 1, moving trolley; 11, baffle; 2, guide base; 21, guide rail; 3, impact block; 31, moving slider; 32, mounting panel; 33, impact block body; 34, limit stopper; 4, traction rope; 5, tractor; 51, vehicle body; 52, clamping member; 521, driving handle; 5211, handle body; 5212, elliptical cam; 522, first clamping plate; 5221, first clamping surface; 523, second clamping plate; 5231, second clamping surface; 5232, mounting slide plate; 5230, third toothed surface; 5233, second clamping plate body; 53, mounting plate; 531, slide groove; 200, impact head; 6, impact body; 61, first impact surface; 610, first mounting groove ;611, flat surface;612, first inclined surface;62, second impact surface;620, second mounting groove;621, second inclined surface;64, impact end surface;7, brake pad;8, connecting plate;71, fixing part;300, damping device;301, cavity;310, back plate;320, top plate;321, top limit mounting groove;322, top boss;330, bottom plate;331, bottom limit mounting groove;332, bottom boss;340, first movable slide plate;350, movable vertical plate;360, limiting part;361, top plate column;362, limiting column;365, bottom plate column;363, outer convex arc surface;364, vertical surface;370, second movable slide plate;380, first energy absorbing tube;390, second energy absorbing tube. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0046] 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."

[0047] The following will be combined with the accompanying drawings to describe the various embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics 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.

[0048] 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.

[0049] 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.

[0050] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, 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.

[0051] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0052] One embodiment of the present invention relates to a linear impact 100 for a power battery impact test. Figure 1 , Figure 2 As shown, the linear impact device 100 moves along a track, and the track extends toward the direction of the sample to be tested. The sample to be tested can be a power battery such as a battery pack, a battery module, a battery cell, etc. of a new energy vehicle. The linear impact device 100 includes: a mobile trolley 1, a guide base 2, an impact block 3 and a driving member. The driving member includes: a traction rope 4, a driving motor that drives the traction rope 4 to move along the extension direction of the track, and a traction vehicle 5 towed by the traction rope 4. The traction vehicle 5 is used to clamp or release the traction rope 4. The mobile trolley 1 can move along the track. The guide base 2 is fixed to the top surface of the mobile trolley 1, and the guide base 2 is provided with a guide rail 21 extending along the direction of the track, and the impact block 3 is slidably connected to the guide rail 21. The traction vehicle 5 is used to push the mobile trolley 1 to move when it is pulled by the traction rope 4 to move toward the direction of the sample to be tested. After the mobile trolley 1 is pushed by the traction vehicle 5 for a preset distance, the traction vehicle 5 releases the traction rope 4 and disengages from it. That is, the traction vehicle 5 is located on the rear end side of the mobile trolley 1 ( Figure 1 and Figure 2The traction rope 4 drives the tractor 5 to move forward (toward the direction of the sample to be tested), and the tractor 5 pushes the rear end of the mobile trolley 1 to make the mobile trolley 1 move forward (toward the direction of the sample to be tested). A damping device 300 is provided at the front end of the track to lock the mobile trolley 1. When the mobile trolley 1 is stopped by the damping device 300, the impact block 3 moves along the guide rail 21 toward the sample to be tested under the action of inertia, and the head of the impact block 3 is used to rush out of the mobile trolley 1 and hit the sample to be tested.

[0053] Specifically, the linear impact system includes a linear impact device 100 and a damping device 300. The linear impact device 100 also includes: an impact head 200 arranged at the front end of the mobile trolley 1. The damping device 300 is arranged at the front end of the track, and is used to lock the mobile trolley 1. The damping device 300 has a cavity 301 for inserting the impact head 200. The driving motor is connected to a turntable, and the traction rope 4 is wound around the turntable. The traction rope 4 is arranged in a closed loop along the track. The driving motor drives the turntable to rotate, and the rotation of the turntable drives the traction rope 4 to rotate, so that the driving motor drives the traction rope 4 to run in a closed loop along the track. The traction vehicle 5 clamps one side of the traction rope 4 forming a closed loop, and the traction rope 4 drives the traction vehicle 5 to move toward the direction of the sample to be tested. The traction vehicle 5 is gradually accelerated by the traction rope 4 while moving on the track, and can be accelerated to the speed required by the test. The mobile trolley 1 is placed on the track and is located in front of the tractor 5. When the tractor 5 moves, it pushes the mobile trolley 1 to move in the direction of the sample to be tested, thereby providing speed to the mobile trolley 1, so that the mobile trolley 1 accelerates to the speed required by the test. After the mobile trolley 1 reaches the acceleration, the tractor 5 releases the traction rope 4, and the tractor 5 continues to push the mobile trolley 1 along the track in the direction of the sample to be tested. The mobile trolley 1 continues to move forward until the impact head 200 is inserted into the cavity 301 of the damping device 300, and the mobile trolley 1 stops moving. At this time, the impact block 3 moves along the guide rail 21 toward the sample to be tested due to inertia and impacts the sample to be tested.

[0054] In the existing linear impact test, the motor is directly connected to the transmitter in the short-range track, and the transmitter is pushed to push the mobile trolley 1 to drive the impact block 3 to impact the sample to be tested. In this structure, the speed of the mobile trolley 1 and the impact block 3 is relatively low, generally 8km / s, which cannot meet the actual impact requirements. If the existing device needs to reach the speed required by the test, it is necessary to increase the motor power, which will cause great costs and difficulties in actual implementation. However, this embodiment uses a driving motor to drive the traction rope 4. After the traction rope 4 pulls the traction vehicle 5, the traction vehicle 5 can move along the track to reach a sufficiently fast speed, and also push the mobile trolley 1 to the speed required by the test, which can meet the impact energy of 2.5t / 120km / h. After the mobile trolley 1 moves at high speed, it brakes and slows down. Relying on inertia, the impact block 3 can slide freely, and the impact block 3 impacts the sample to be tested. Therefore, by configuring the traction rope 4 and the traction vehicle 5, the capacity of the linear impact device 100 is improved, and the high quality and high speed requirements of the impact block 3 can be met. In addition, the structure of this embodiment is simple, easy to operate, and highly safe. In addition, compared with the tens of millions of dollars of purchase cost of existing equipment, this equipment reduces the test cost and is extremely convenient for the popularization of this test capability.

[0055] The implementation details of this embodiment are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0056] Furthermore, if Figure 1 As shown, a baffle 11 for the tractor 5 to hit is provided on the side of the mobile trolley 1 facing away from the sample to be tested.

[0057] In addition, the baffle 11 is an elastic member, and the traction rope 4 is a steel wire rope. The baffle 11 is an elastic member, and after the traction vehicle 5 releases the traction rope 4, the impact of the traction vehicle 5 on the mobile trolley 1 is reduced, thereby ensuring the accuracy of the test.

[0058] Furthermore, this example relates to a tractor 5, such as Figure 3 As shown, the tractor 5 comprises: a vehicle body 51 and a clamping member 52 arranged on the vehicle body 51. The clamping member 52 is used to clamp or release the traction rope 4.

[0059] Specifically, Figure 4 , Figure 5 and Figure 6 As shown, Figure 4 and Figure 5The guide wheel is not shown in the figure, and the clamping member 52 includes: a driving handle 521, a first clamping plate 522 and a second clamping plate 523. The driving handle 521 includes: a handle body 5211 rotatably connected to the vehicle body 51, and an elliptical cam 5212 eccentrically connected to the handle body 5211 and driven to rotate by the handle body 5211. The first clamping plate 522 is fixed to the vehicle body 51, and the second clamping plate 523 is arranged opposite to the first clamping plate 522 in a direction perpendicular to the moving direction of the vehicle body 51, and the second clamping plate 523 is movably connected to the vehicle body 51, and the second clamping plate 523 and the first clamping plate 522 are matched to form a movable clamp that can clamp or release the traction rope 4. The second clamping plate 523 is used to be pushed by the elliptical cam 5212 to move toward the first clamping plate 522, and to clamp the traction rope 4 in cooperation with the first clamping plate 522. When the elliptical cam 5212 is in the clamping position, the protruding portion of the elliptical cam 5212 pushes the second clamping plate 523, so that the second clamping plate 523 and the first clamping accessory clamp the traction rope 4, and the second clamping plate 523 is clamped and positioned between the first clamping plate 522 and the elliptical cam 5212. When the elliptical cam 5212 is in the loosening position, the protruding portion of the elliptical cam 5212 rotates away from the second clamping plate 523, and the second clamping plate 523 can move away from the first clamping plate 522, and the second clamping plate 523 and the first clamping plate 522 loosen the traction rope 4. The plane of the elliptical cam 5212 pushes the second clamping plate 523 so that the second clamping plate 523 and the first clamping plate 522 clamp the traction rope 4, and the elliptical cam 5212 is rotated so that the long arc surface portion faces the second clamping plate 523, and at this time, the elliptical cam 5212 is away from the second clamping plate 523, and the second clamping plate 523 and the first clamping plate 522 are loosened.

[0060] In addition, if Figure 4 , Figure 5 and Figure 6 As shown, the first clamping plate 522 has a first clamping surface 5221 facing the second clamping plate 523, and the second clamping plate 523 has a second clamping surface 5231 facing the first clamping plate 522. The first clamping surface 5221 and the second clamping surface 5231 are at least partially toothed surfaces that match each other, so that the first clamping surface 5221 and the second clamping surface 5231 have multiple arc surface areas that can clamp the traction rope 4.

[0061] In addition, if Figure 4 , Figure 5 and Figure 6 As shown, the tractor 5 further includes: a pair of mounting plates 53 spaced apart from each other along the moving direction of the vehicle body 51, and the second clamping plate 523 is slidably connected to the pair of mounting plates 53. The mounting plates 53 are provided with a slide groove 531 that moves in a direction perpendicular to the moving direction of the vehicle body 51, and the second clamping plate 523 at least partially extends out and is inserted into the slide groove 531, so that when the protruding portion of the elliptical cam 5212 rotates away from the second clamping plate 523, the second clamping plate 523 can slide away from the first clamping plate 522 along the slide groove 531.

[0062] Specifically, Figure 4 , Figure 5 and Figure 6 As shown, the second clamping plate 523 includes: a mounting plate 5232 at least partially inserted into the slide groove 531, and a second clamping plate body 5233 fixedly connected to the mounting plate 5232. The second clamping plate body 5233 cooperates with the first clamping plate 522 to clamp the traction rope 4.

[0063] Furthermore, if Figure 4 , Figure 5 and Figure 6 As shown, the first clamping plate 522 has a first toothed surface on one side facing the second clamping plate 523, and the second clamping plate body 5233 has a second toothed surface on one side facing the first clamping plate 522. When the elliptical cam 5212 is in the clamping position, the first toothed surface and the second toothed surface are at least partially separated to form a toothed space for clamping the traction rope 4, so as to better clamp the traction rope 4. The first toothed surface is the first clamping surface 5221, and the second clamping surface 5231 includes the second toothed surface.

[0064] In addition, if Figure 4 , Figure 5 and Figure 6 As shown, the side of the mounting slide plate 5232 facing the first clamping plate 522 has a third toothed surface 5230 , and when the elliptical cam 5212 is located in the clamping position, the first toothed surface and the third toothed surface 5230 are meshed and abutted.

[0065] Furthermore, if Figure 4 , Figure 5 and Figure 6 As shown, when the elliptical cam 5212 is in the clamping position, the handle body 5211 extends outside the vehicle body 51. A driving block is provided on the track, and the driving block is used to push the handle body 5211 to rotate. The rotation of the handle body 5211 drives the elliptical cam 5212 to rotate, so that the elliptical cam 5212 is in the loosening position. When the tractor 5 moves along the track to the driving block, since the handle body 5211 is outside the vehicle body 51, the driving block collides with the handle body 5211 on the moving tractor 5, so that the handle body 5211 rotates, drives the elliptical cam 5212 to rotate, and the elliptical cam 5212 no longer pushes the second clamping plate 523, and the second clamping plate 523 and the first clamping plate 522 release the traction rope 4.

[0066] Furthermore, if Figure 2 , Figure 3 and Figure 4 As shown, the elliptical cam 5212 and the handle body 5211 are respectively located on both sides of the vehicle body 51 .

[0067] In addition, if Figure 3As shown, the vehicle body 51 has a fixed plate, which is rectangular. A front guide wheel is installed at the front end of the fixed plate, and a rear guide wheel is installed at the rear end of the fixed plate. The clamping member 52 is arranged between the front guide wheel and the rear guide wheel.

[0068] Furthermore, if Figure 1 and Figure 2 As shown, the impact block 3 includes: a moving slider 31 slidably connected to the guide rail 21, a mounting panel 32 connected to the moving slider 31, and an impact block body 33 detachably connected to the mounting panel 32. The guide base 2 has a pair of limit stops 34 arranged at both ends of the guide rail 21, and the moving slider 31 is slidably located between the pair of limit stops 34, so that the impact block 3 will not be separated from the guide rail 21. The impact block body 33 is used to move outside the extension direction of the guide rail 21 under inertia.

[0069] The second embodiment of the present invention relates to an impact head 200. The impact head 200 can be used in the linear impact device 100 of the first embodiment. Figure 2 As shown, the impact head 200 is installed at the front end of the mobile trolley 1, and the impact head 200 is used to be inserted into the cavity 301 of the damping device 300. Figure 7 As shown, the impact head 200 includes: an impact body 6 and a brake pad 7. The impact body 6 has a first impact surface 61 extending toward the impact direction, a second impact surface 62 arranged opposite to the first impact surface 61, a mounting surface connecting the first impact surface 61 and the second impact surface 62, and an impact end surface 64 arranged opposite to the mounting surface. The first impact surface 61 includes: a straight surface 611 connected to the mounting surface, and a first inclined surface 612 connected to the straight surface 611, the first inclined surface 612 is arranged at a preset angle with the straight surface 611, and the first inclined surface 612 is inclined toward the direction of the second impact surface 62. The brake pad 7 is detachably connected to the impact body 6; a plurality of brake pads 7 arranged along the extension direction of the first impact surface 61 are arranged on the first impact surface 61. In this way, the impact body 6 is prevented from being worn, and the brake pad 7 can replace the first impact surface 61 of the impact body 6 to be worn. After the brake pad 7 is worn, the brake pad 7 can be replaced to extend the service life of the impact head 200.

[0070] Furthermore, if Figure 7 As shown, the brake pad 7 is arranged on the flat surface 611 .

[0071] Furthermore, if Figure 8 As shown, a first mounting groove 610 is formed on the first impact surface 61, and the brake pad 7 is disposed in the first mounting groove 610, and the brake pad 7 is exposed outside the first mounting groove 610. This prevents the brake pad 7 from shifting when the impact head 200 is inserted into the cavity 301.

[0072] Furthermore, if Figure 8As shown, the brake pad 7 is fixedly connected to the bottom of the first mounting groove 610 through a fixing member 71. The brake pad 7 is rectangular and the fixing member 71 can be a screw.

[0073] like Fig. 9 As shown, a plurality of brake pads 7 are arranged on the second impact surface 62 and are arranged along the extension direction of the second impact surface 62 .

[0074] Furthermore, if Fig. 9 As shown, a second mounting groove 620 is formed on the second impact surface 62 , and the brake pad 7 is disposed in the second mounting groove 620 , and the brake pad 7 is exposed outside the second mounting groove 620 .

[0075] Furthermore, if Figure 7 As shown, the brake pad 7 is fixedly connected to the bottom of the second mounting groove 620 through a fixing member 71, and the brake pad 7 is rectangular.

[0076] Furthermore, if Figure 7 As shown, the impact head 200 further includes: a connecting plate 8 detachably connected to the impact body 6, the connecting plate 8 is mounted on the mounting surface and extends in a direction perpendicular to the extension direction of the first impact surface 61. The connecting plate 8 is detachably connected to the front end of the moving trolley.

[0077] Furthermore, if Figure 7 As shown, the impact end face 64 is an arc surface, and the second impact surface 62 has a second inclined surface 621 extending toward the first impact surface 61, and the second inclined surface 621 is connected to the impact end face 64. The length of the first inclined surface 612 is less than that of the straight surface 611, and the length of the second inclined surface 621 is less than that of the first inclined surface 612.

[0078] The third embodiment of the present utility model relates to a damping device 300. Fig.10 , Fig.11 , Fig.13 As shown, the damping device 300 can be matched with the linear impact device 100 in the first embodiment and the impact head 200 in the second embodiment. The damping device 300 includes: a back plate 310, a top plate 320, a bottom plate 330, a first movable slide plate 340, a movable vertical plate 350 and a limiter 360. The back plate 310 of the damping device 300 is fastened to the collision rigid wall, the top plate 320 and the bottom plate 330 are arranged on the back plate 310, and the top plate 320 is relatively spaced apart in the height direction to form an installation space, and the installation space has an opening on the side away from the back plate 310. The first movable slide plate 340 is movably arranged in the installation space, and is slidably arranged with the bottom plate 330 and the top plate 320. The movable vertical plate 350 is movably arranged in the installation space, and is slidably arranged with the bottom plate 330 and the top plate 320. The movable vertical plate 350 and the first movable slide plate 340 are relatively spaced apart in the width direction of the installation space to form a cavity 301, and the width direction, i.e. Fig.10The left and right directions in the cavity 301 are the length direction of the back plate 310. The cavity 301 has an insertion port on the side away from the back plate 310, and the first movable slide plate 340 and the movable vertical plate 350 move relative to each other to change the width of the cavity 301. The limiter 360 is movably connected to the top plate 320 and the bottom plate 330, and is used to push the movable vertical plate 350 to be in a locked position or release the movable vertical plate 350. When the impact head 200 is inserted into the cavity 301 from the insertion port, the movable vertical plate 350 cooperates with the first movable slide plate 340 to lock the impact head 200, that is, the impact head 200 forms a self-locking with the cavity 301, and the mobile trolley 1 also stops moving. This structure can not only play a damping and energy absorption role, but also play a role in stabilizing the mobile trolley 1, preventing the front end of the mobile trolley 1 from rising or the rear end from warping up. In addition, the space of the movable vertical plate 350 is released by the limiter 360, the impact head 200 is loosened, and the mobile trolley 1 can be separated from the damping device 300.

[0079] Furthermore, if Fig.10 , Fig.11 , Fig.13 As shown, the bottom plate 330 has a bottom limit installation groove 331 extending toward the back plate 310, and the top plate 320 has a top limit installation groove 321 extending toward the back plate 310. The movable vertical plate 350 is embedded in the bottom limit installation groove 331 and the top limit installation groove 321, and slides along the groove width direction of the bottom limit installation groove 331 and the top limit installation groove 321. Fig.10 Since the bottom limit installation groove 331 and the top limit installation groove 321 are provided, the movable vertical plate 350 moves from left to right or from right to left along the bottom limit installation groove 331 and the top limit installation groove 321 .

[0080] Furthermore, if Fig.10 , Fig.11 , Fig.13 As shown, the bottom plate 330 has a bottom boss 332, a side wall of which constitutes a groove wall of the bottom limit installation groove 331, and the top plate 320 has a top boss 322, a side wall of which constitutes a groove wall of the top limit installation groove 321. The bottom boss 332 and the top boss 322 are both clamped between the first movable slide plate 340 and the movable vertical plate 350.

[0081] In addition, if Fig.10 , Fig.11 , Fig.13As shown, the limiting member 360 has a top plate column 361 inserted into the top plate 320, a bottom plate column 365 inserted into the bottom plate 330, and an intermediate limiting column 362 connecting the top plate column 361 and the bottom plate column 365. The intermediate limiting column 362 has an elliptical cam portion, and the elliptical cam portion has an outer convex arc surface 363, and a vertical surface 364 adjacent to the outer convex arc surface 363. The limiting member 360 is rotated until the vertical surface 364 abuts against the movable vertical plate 350, and the movable vertical plate 350 is in the locking position. By operating the top plate column 361 to rotate, the limiting member 360 is rotated until the outer convex arc surface 363 faces the movable vertical plate 350, and the movable vertical plate 350 is released.

[0082] Furthermore, if Fig.10 , Fig.11 As shown, the cavity 301 is an inclined wedge cavity 301. When the movable vertical plate 350 is in the locking position, the width of the cavity 301 gradually decreases in the direction toward the back plate 310. The head of the impact head 200 is wedge-shaped, and the wedge-shaped surface of the head of the impact head 200 faces the movable vertical plate 350 of the damping device 300, so that the impact head 200 and the cavity 301 form a self-locking.

[0083] Furthermore, if Fig.10 , Fig.11 As shown, the damping device 300 further includes: a second movable slide plate 370 and a first energy absorbing tube 380. The second movable slide plate 370 is movably arranged in the installation space, and is slidably arranged with the bottom plate 330 and the top plate 320; the second movable slide plate 370 and the first movable slide plate 340 are relatively spaced apart along the width direction of the installation space, and the first movable slide plate 340 is located between the second movable slide plate 370 and the movable vertical plate 350. The first energy absorbing tube 380 is clamped between the second movable slide plate 370 and the first movable slide plate 340, and the first energy absorbing tube 380 is used to collapse and adjust the distance between the second movable slide plate 370 and the first movable slide plate 340 along the width direction of the installation space. Preferably, there are a plurality of first energy absorbing tubes 380, which are horizontally placed between the second movable slide plate 370 and the first movable slide plate 340, and the second movable slide plate 370 and the first movable slide plate 340 have recessed positions, and the first energy absorbing tube 380 is embedded in the recessed positions. During the test, the impact head 200 impacts the cavity 301, and the energy absorbing tube between the second movable slide 370 and the first movable slide 340 begins to collapse due to the impact force to absorb energy, thereby alleviating the hard contact between the impact head 200 and the cavity 301 and increasing the number of times the self-locking mechanism is used.

[0084] like Fig.10 , Fig.11As shown, the damping device 300 further includes: a second energy absorbing tube 390, which is connected to the back plate 310, is located outside the installation space, and extends toward the side where the opening of the installation space is located. The second energy absorbing tube 390 is used to collapse toward the back plate 310. The second energy absorbing tube 390 is provided on both sides of the width direction of the installation space. The impact force of the test impact energy on the impact head 200 and the damping device 300 is shared, thereby protecting the impact head 200 and the damping device 300.

[0085] The fourth embodiment of the utility model also relates to a linear impact system. The linear impact system comprises: the linear impact device 100 in the first embodiment and the damping device 300 in the second embodiment. The linear impact device 100 comprises: an impact head 200 arranged at the front end of the mobile trolley 1, and the impact head 200 is the impact head 200 in the second embodiment. The damping device 300 is arranged at the front end of the track, and is used to lock the mobile trolley 1. The damping device 300 has a cavity 301 for inserting the impact head 200. After the impact head 200 is inserted into the cavity 301 and is in place, the mobile trolley 1 stops moving.

[0086] It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, the second embodiment and the third embodiment, and this embodiment can be implemented in conjunction with the first embodiment, the second embodiment and the third embodiment. The relevant technical details mentioned in the first embodiment, the second embodiment and the third embodiment are still valid in this embodiment, and are not repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0087] Preferred embodiments of the present invention have been described in detail above, 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.

[0088] 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.

[0089] 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 linear impact device for power battery impact test, characterized in that: The linear impact device moves along a track, and the track extends toward the direction of the sample to be tested; the linear impact device includes: A mobile trolley, the mobile trolley is used to move along the track; A guide base, the guide base is fixed to the top surface of the mobile trolley, and the guide base is provided with a guide rail extending along the track direction; An impact block, the impact block is slidably connected to the guide rail; A driving member, the driving member comprising: a traction rope, a driving motor driving the traction rope to move along the extension direction of the track, and a traction vehicle towed by the traction rope; the traction vehicle is used to clamp or release the traction rope; Wherein, the tractor is used to push the mobile trolley to move when it is pulled by the traction rope and moves toward the direction of the sample to be tested; after the mobile trolley is pushed by the tractor for a preset distance, the tractor releases the traction rope and disengages from it; when the mobile trolley stops, the impact block moves along the guide rail toward the direction of the sample to be tested under the action of inertia, and the head of the impact block is used to rush out of the mobile trolley and hit the sample to be tested.

2. The linear impact device for power battery impact test according to claim 1, characterized in that: A baffle for the tractor to hit is arranged on the side of the mobile trolley away from the sample to be tested.

3. The linear impact device for power battery impact test according to claim 2, characterized in that: The baffle is an elastic member; the traction rope is a steel wire rope.

4. The linear impact device for power battery impact test according to claim 1, characterized in that: The tractor comprises a vehicle body and a clamping member arranged on the vehicle body; the clamping member is used for clamping or releasing the traction rope.

5. The linear impact device for power battery impact test according to claim 4, characterized in that: The clamping member comprises: A driving handle, the driving handle comprising: a handle body rotatably connected to the vehicle body, and an elliptical cam eccentrically connected to the handle body and driven to rotate by the handle body; A first clamping plate; the first clamping plate is fixed to the vehicle body; and A second clamping plate, the second clamping plate and the first clamping plate are arranged opposite to each other in a direction perpendicular to the moving direction of the vehicle body, and the second clamping plate is movably connected to the vehicle body; the second clamping plate is used to be pushed by the elliptical cam to move toward the first clamping plate, and cooperate with the first clamping plate to clamp the traction rope; When the elliptical cam is located at the clamping position, the second clamping plate is clamped and positioned between the first clamping plate and the elliptical cam; when the elliptical cam is located at the loosening position, the second clamping plate and the first clamping plate release the traction rope.

6. The linear impact device for power battery impact test according to claim 5, characterized in that: The first clamping plate has a first clamping surface facing the second clamping plate; the second clamping plate has a second clamping surface facing the first clamping plate; At least parts of the first clamping surface and the second clamping surface are toothed surfaces that fit together.

7. The linear impact device for power battery impact test according to claim 6, characterized in that: When the elliptical cam is located at the clamping position, the handle body extends outside the vehicle body; A driving block is arranged on the track; the driving block is used to push the handle body to rotate, and the rotation of the handle body drives the elliptical cam to rotate, so that the elliptical cam is located in the released position.

8. The linear impact device for power battery impact test according to claim 1, characterized in that: The impact block comprises: a moving slider slidably connected to the guide rail, a mounting panel connected to the moving slider, and an impact body detachably connected to the mounting panel; The guide base is provided with a pair of limit stops arranged at both ends of the guide rail; the movable sliding block is slidably located between the pair of limit stops; and the impact body is used to move outside the extension direction of the guide rail under inertia.

9. The linear impact device for power battery impact test according to claim 1, characterized in that: The traction rope closed loop is looped in the track.

10. A linear impact system for power battery impact test, characterized in that: include: The linear impact device according to any one of claims 1 to 9, comprising: an impact head disposed at the front end of the moving trolley; A damping device is arranged at the front end of the track and is used to lock the moving trolley; the damping device has a cavity for inserting the impact head.

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