Power storage battery bottom impact test device

Abstract

The utility model relates to a power storage battery bottom impact test device, which comprises a base, a rack, a cylinder, a guide rail, a sliding block and an impact head, and can be used for detecting the extrusion resistance and puncture resistance of a battery module, a battery monomer, a high-voltage assembly and the like in a power storage battery after the bottom of the power storage battery is impacted.

Description

Technical Field

[0001] The utility model relates to the technical field of power storage battery safety testing, in particular to a power storage battery bottom impact test device. Background Art

[0002] With the rapid development of the electric vehicle industry, the production and sales of electric vehicles are growing rapidly, and the electrical safety of electric vehicles has attracted more and more attention. The power battery of electric vehicles is affected by external forces such as impact and extrusion, which causes the power battery shell to deform and leads to internal thermal runaway, thus causing new energy vehicles to catch fire. Electric vehicle abuse tests are increasingly used to test the safety performance of power batteries. In the power battery collision test, it is necessary to simulate the entire vehicle use scenario as much as possible to achieve conditions close to the actual accident. Various scenario tests include simulated collision, side collision, bottom collision, bottom scratch and other tests.

[0003] The utility model provides a power storage battery bottom impact test device, which is used to detect the anti-extrusion and anti-puncture capabilities of battery modules, battery cells, high-voltage components and the like inside the power storage battery after the bottom of the power storage battery is impacted. Utility Model Content

[0004] The utility model aims to provide a power storage battery bottom impact test device for detecting the anti-extrusion and anti-puncture capabilities of battery modules, battery cells, high-voltage components and the like inside the power storage battery after the bottom of the power storage battery is impacted.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A power battery bottom impact test device, comprising:

[0007] A base, the base comprising a bottom plate, a frame mounted on the bottom plate, and a plurality of cabinet panels laid on the walls of the frame, wherein the bottom plate, the frame and the cabinet panels form a cabinet body;

[0008] A frame, the frame comprising two side frames arranged opposite to each other, a top plate located on the top of the side frames and a back plate located on the back sides of the two side frames, the two side frames are fixed to the bottom plate in a left-right symmetrical manner, the top plate is fixed to the top of the two side frames, the bottom of the back plate is fixedly connected to the bottom plate, and the left and right sides of the back plate are fixedly connected to the rear sides of the two side frames, and the top plate also has a clearance hole;

[0009] A cylinder, the cylinder is fixed to the base, and the cylinder has a piston rod;

[0010] Guide rails, two guide rails symmetrically arranged on the left and right, and the guide rails are fixedly connected to the frame;

[0011] A slider, the slider is slidably mounted on the guide rail; the piston rod of the cylinder is drivingly connected to the slider; and

[0012] The impact head comprises a connecting portion and an impact portion, wherein the connecting portion is fixedly connected to the top of the slider, the impact portion is located at the top of the connecting portion, the impact portion comprises a circular cylinder, and the top of the cylinder is hemispherical, and the impact portion can extend from the clearance hole at the top.

[0013] In one embodiment, the slider includes a main body and a guide rail portion connected to the left and right sides of the main body, the guide rail portion is provided with a guide hole matched with the guide rail, and the bottom of the main body has a contact plane that is provided to contact the piston rod of the cylinder.

[0014] In one embodiment, a silencer block is provided at the bottom of the top plate at a position corresponding to the sliding block, the silencer block is made of hard plastic, and a through hole matching the clearance hole is provided on the silencer block.

[0015] In one embodiment, a recessed portion is provided on the top of the sliding block, the impact head is fixedly connected to the recessed portion, and the depth of the recessed portion is less than the thickness of the muffler block.

[0016] In one embodiment, the top of the back plate is lower than the top plate to form a window between the top of the back plate and the top plate, and the height of the window is greater than the height of the slider.

[0017] In one embodiment, the back plate is further provided with a plurality of hollow portions, and the plurality of hollow portions are arranged at intervals in the height direction.

[0018] In one embodiment, the lower portion of the side frame has a greater width than the upper portion.

[0019] In one embodiment, the frame also includes a support block and a support plate, the support block is fixedly connected to the inner side of the side frame facing each other, and the left and right sides of the support plate are fixedly connected to the support block; the guide rail of the guide rail is fixedly connected to the support plate.

[0020] In one embodiment, the top portion is detachably connected to the side frame, and the top portion is provided with a receiving hole matching the guide rail, and the top portion of the guide rail is located in the receiving hole.

[0021] In one embodiment, the cabinet of the power battery bottom impact test device further comprises a gas cylinder and a control circuit for controlling the operation of the power battery bottom impact test device, and the gas cylinder and the control circuit are located in the cabinet.

[0022] The utility model adopts the above technical scheme, and has the beneficial effect that the utility model provides a power battery bottom impact test device which can be used to detect the anti-extrusion and anti-puncture capabilities of battery modules, battery cells, high-voltage components, etc. inside the power battery after the bottom of the power battery is impacted. The power battery bottom impact test device has a simple structure and the impact process is easy to control. It can more realistically simulate the damage condition of the bottom of the power battery of the vehicle after being impacted, thereby improving the safety performance of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a power battery bottom impact test device is shown.

[0024] Figure 2 A schematic diagram of the power battery bottom impact test device after the cabinet plate is removed is shown.

[0025] Figure 3 A schematic diagram of the slider and the impact head is shown.

[0026] Figure 4 A schematic diagram of a power battery bottom impact test device in an initial state of an impact test is shown.

[0027] Figure 5 A schematic diagram is shown of the impact head of the power battery bottom impact test device impacting the power battery to be tested.

[0028] Figure 6 A schematic diagram of the back side of a power battery bottom impact test device is shown. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. 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.

[0030] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0031] 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."

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] like Figure 1-Figure 5 As shown, this embodiment provides a power battery bottom impact test device, including a base 1, a frame 2, a cylinder 3, a guide rail 4, a slider 5 and an impact head 6.

[0038] The base 1 includes a bottom plate 11, a rectangular parallelepiped frame 12 mounted on the bottom plate 11, and a plurality of cabinet panels 13 laid on the wall of the frame 12. The plurality of cabinet panels 13 are laid on the side and top of the frame 12 to form a cabinet with a peripheral wall, which is used to accommodate the cylinder 3 and the lower part of the frame 2. The cabinet is also used to accommodate the gas cylinder 7, the pipelines connecting the gas cylinder 7 and the cylinder 3, and the control circuit for controlling the operation of the power battery bottom impact test device.

[0039] The frame 2 includes two side frames 21 arranged opposite to each other, a top plate 22 located on the top of the side frames 21, and a back plate 23 located on the back of the two side frames. The two side frames 21 are placed on the bottom plate 11 in a bilaterally symmetrical manner, and the bottoms of the two side frames 21 are fixedly connected to the bottom plate 11 by welding. The top plate 22 is fixed to the tops of the two side frames 21 by bolts. The bottom of the back plate 23 is fixedly connected to the bottom plate 11 by welding, and the left and right sides of the back plate 23 are fixedly connected to the rear sides of the two side frames 21 by welding. The various components of the frame 2 are firmly connected to the bottom plate 11 by the above-mentioned fixing method. A support block 24 is fixedly connected to the inner sides of the two side frames 21 facing each other. The support block 24 is fixedly connected to the corresponding side frame 21 by bolts. A support plate 25 is also fixedly connected to the two support blocks 24. The left and right sides of the support plate 25 are fixedly connected to the corresponding support block 24 by bolts. The horizontal position of the support plate 25 is basically flush with the cabinet board on the top of the cabinet. Figure 2 The top plate 22 of the frame 2 is provided with a clearance hole 26 for the impact head 6 to pass through.

[0040] The bottom of the cylinder 3 is fixed to the bottom plate 11 by bolts and is located between the two side frames 21. The main body of the cylinder 3 is accommodated in the cabinet, and the support plate 25 has a through hole for the piston rod 31 of the cylinder 3 to extend, so that the piston rod of the cylinder 3 can extend from the support plate 25 and drive the slider 5 located above the support plate 25 to drive the slider 25 to perform telescopic movement in the vertical direction.

[0041] The guide track 4 includes two guide rails 41, which extend in the vertical direction and are symmetrically arranged in the left-right direction. The bottom of the guide rail 41 is fixedly connected to the support plate 25 by bolts, and the top extends into the corresponding receiving hole of the top plate 22 to facilitate the installation and replacement of the slider 5.

[0042] See also Figure 1-Figure 3The slider 5 includes a main body 51 in a substantially rectangular parallelepiped shape, and guide rails 52 are connected to the left and right sides of the main body 51. The guide rails 52 are provided with guide holes 53 that match the guide rails 41. The two guide rails 41 of the guide track 4 pass through the corresponding guide holes 53, respectively, so that the slider 5 can move in the vertical direction along the guide rails 41. The bottom of the main body 51 has a contact plane 54 that contacts the piston rod 31 of the cylinder 3, and the top of the piston rod 31 contacts the contact plane 54, and drives the slider 5 to move along the guide rails 41.

[0043] The impact head 6 includes a connecting portion 61 connected to the slider and an impact portion 62 for impacting the power battery. The bottom of the connecting portion 61 is a flange surface, which is fixedly connected to the slider 5 by bolts. The impact portion 62 is a cylindrical structure, and the head of the impact portion 62 is hemispherical. The head of the impact portion 62 collides with the power battery to simulate the ability of the battery module, battery cell, high-voltage component, etc. inside the power battery to resist extrusion and puncture after the bottom of the power battery is impacted.

[0044] See also Figure 4 and Figure 5 , Figure 4 and Figure 5 The schematic diagram of the power battery bottom impact test device provided in this embodiment is shown in which the power battery to be tested is subjected to an impact test. Figure 4 is a schematic diagram of the initial state. Figure 5 It is a schematic diagram under the impact state. The power storage battery 9 to be tested is fixedly installed on the top of the frame 2, and the distance from the top of the frame 2 is determined by the length of the impact part 62 of the impact head 6 to ensure that the impact part 62 of the impact head 6 can impact the power storage battery 9 to be tested. In the initial state, the cylinder 3 is in a non-working state or a standby state. At this time, the piston rod of the cylinder 3 is in an unextended state, and the slider 5 rests on the piston rod due to gravity. When conducting the test, the cylinder 3 works, and the piston rod of the cylinder 3 extends to drive the slider 5 to move upward along the guide track 4 at a set speed until the impact head 6 fixed on the slider 5 hits the power storage battery 9 to be tested located on the top of the frame 2. After the impact is completed, the cylinder 3 returns to the initial state, and the slider 5 and the impact head 6 also return to the initial state due to gravity along with the piston rod of the cylinder, and an impact test is completed.

[0045] See also Figure 2The bottom of the top plate 22 is provided with a muffler block 8 at the position corresponding to the slider 5. The muffler block 8 is made of hard plastic, such as polypropylene (PP), polyethylene (PE), polycarbonate (PC), nylon (PA), polystyrene (PS), etc. The muffler block 8 is provided with a through hole that is the same as or slightly larger than the clearance hole 26. The through hole is provided on the premise that it does not hinder the impact head 6 from performing an impact test on the power storage battery to be tested. The muffler block 8 allows the slider 5 to directly hit the top plate 22, avoiding direct collision between the two iron parts, thereby playing a muffler role.

[0046] Preferably, see Figure 3 and Figure 5 The top of the slider 5 is provided with a recessed portion 55 recessed downward, the impact head 6 is fixedly connected in the recessed portion 55, and the depth of the recessed portion 55 is less than the thickness of the muffler block 8. When the slider 5 collides with the muffler block 8, the muffler block 8 can be located in the recessed portion 55, but since the thickness of the muffler block 8 is relatively large, it can be ensured that the slider 5 will not collide with the top plate 22, and at the same time, the impact portion of the impact head 6 can be extended to a longer length.

[0047] See also Figure 6 The top height of the back plate 23 is lower than the top plate 22, so as to form a window 231 between the top of the back plate 23 and the top plate 22. The height of the window 231 is greater than the height of the slider 5, so that the slider 5 will not be blocked by the back plate 23 when it hits the power storage battery 9 to be tested, and can be better photographed by the high-speed camera arranged around the rack 2. Preferably, a plurality of hollow parts 232 are further provided in the middle of the back plate 23, and the plurality of hollow parts 232 are arranged at intervals in the height direction, so that the high-speed camera arranged around the rack 2 can better photograph the movement process of the slider 5.

[0048] See also Figure 2 The side frame 21 is roughly "H"-shaped in shape, and its lower part is wider than the upper part. Under the premise of maintaining the stability of the entire frame structure, the high-speed camera arranged around the frame can be less obstructed when shooting the impact head 6 hitting the power battery to be tested.

[0049] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A power battery bottom impact test device, characterized in that: include: A base, the base comprising a bottom plate, a frame mounted on the bottom plate, and a plurality of cabinet panels laid on the walls of the frame, wherein the bottom plate, the frame and the cabinet panels form a cabinet body; A frame, the frame comprising two side frames arranged opposite to each other, a top plate located on the top of the side frames and a back plate located on the back sides of the two side frames, the two side frames are fixed to the bottom plate in a left-right symmetrical manner, the top plate is fixed to the top of the two side frames, the bottom of the back plate is fixedly connected to the bottom plate, and the left and right sides of the back plate are fixedly connected to the rear sides of the two side frames, and the top plate also has a clearance hole; A cylinder, the cylinder is fixed to the base, and the cylinder has a piston rod; Guide rails, two guide rails symmetrically arranged on the left and right, and the guide rails are fixedly connected to the frame; A slider, the slider is slidably mounted on the guide rail; the piston rod of the cylinder is drivingly connected to the slider; and The impact head comprises a connecting portion and an impact portion, wherein the connecting portion is fixedly connected to the top of the slider, the impact portion is located at the top of the connecting portion, the impact portion comprises a circular cylinder, and the top of the cylinder is hemispherical, and the impact portion can extend from the clearance hole at the top.

2. The power battery bottom impact test device according to claim 1, characterized in that: The slider includes a main body and guide rails connected to the left and right sides of the main body, the guide rails are provided with guide holes matched with the guide rails, and the bottom of the main body has a contact plane that contacts the piston rod of the cylinder.

3. The power battery bottom impact test device according to claim 1, characterized in that: A silencer block is arranged at the bottom of the top plate at a position corresponding to the sliding block. The silencer block is made of hard plastic and is provided with a through hole matching the clearance hole.

4. The power battery bottom impact test device according to claim 3, characterized in that: A recessed portion is arranged on the top of the sliding block, the impact head is fixedly connected to the recessed portion, and the depth of the recessed portion is less than the thickness of the muffler block.

5. The power battery bottom impact test device according to claim 1, characterized in that: The top of the back plate is lower than the top plate to form a window between the top of the back plate and the top plate, and the height of the window is greater than the height of the slider.

6. The power battery bottom impact test device according to claim 5, characterized in that: The back plate is also provided with a plurality of hollow portions, and the plurality of hollow portions are arranged at intervals in the height direction.

7. The power battery bottom impact test device according to claim 1, characterized in that: The lower portion of the side frame has a greater width than the upper portion.

8. The power battery bottom impact test device according to claim 1, characterized in that: The frame also includes a support block and a support plate. The support block is fixedly connected to the inner sides of the side frames facing each other, and the left and right sides of the support plate are fixedly connected to the support block; the guide rail of the guide track is fixedly connected to the support plate.

9. The power battery bottom impact test device according to claim 8, characterized in that: The top portion is detachably connected to the side frame, and a receiving hole matching the guide rail is provided on the top portion, and the top portion of the guide rail is located in the receiving hole.

10. The power battery bottom impact test device according to claim 1, characterized in that: The cabinet of the power battery bottom impact test device further comprises a gas cylinder and a control circuit for controlling the operation of the power battery bottom impact test device, and the gas cylinder and the control circuit are located in the cabinet.

Images