CN111551335A - Safety testing device - Google Patents

Abstract

The invention relates to a safety testing device. The safety testing device is suitable for a vibration test of the power battery, the power battery is fixedly arranged on a flat plate, the safety testing device comprises a lifting hook and a hanging scaffold, and the hanging scaffold is positioned above the power battery; one end of the first rope is connected with the lifting hook, and the other end of the first rope is connected with the periphery of the hanging scaffold so that the hanging scaffold is lifted by the lifting hook to a horizontal position; one end of the second rope is connected to the periphery of the hanging scaffold, the other end of the second rope is connected to the periphery of the flat plate, and the hanging scaffold is lifted and the flat plate can be lifted through the second rope; and the pneumatic locking device is used for locking the flat plate on the table top of the vibration test. The invention provides a safety testing device which can lift a power battery with abnormality in time to be separated from a vibration rack, and improves the testing safety.

Description

Safety testing device

Technical Field

The invention relates to the technical field of rack vibration testing of vehicle power batteries, in particular to a safety testing device.

Background

With the popularization of new energy vehicles, safety testing for power batteries is an indispensable link. In the existing vibration test, a power battery needs to be additionally provided with a clamp, the clamp is punched, and the clamp is fixed with a vibration test rack through a bolt. Because the power battery has energy, uncertain factors exist in the testing process, and phenomena such as fire explosion and the like are easy to occur. In the vibration test in-process, in case phenomenons such as the explosion of starting a fire take place, the unable very first time of testing personnel is lifted off power battery package from vibration mesa, can only adopt the fire extinguisher to put out a fire at the scene, and the effect is not good and can cause the harm to the test bench, more probably causes the injury to testing personnel.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a safety testing device which can lift the abnormal power battery off the vibration rack in time and improve the testing safety.

In particular, the invention provides a safety testing device, which is suitable for vibration test of a power battery, wherein the power battery is fixedly arranged on a flat plate, the safety testing device comprises,

the hanging scaffold is positioned above the power battery;

one end of the first rope is connected with the lifting hook, and the other end of the first rope is connected with the periphery of the hanging scaffold so that the hanging scaffold is lifted by the lifting hook to a horizontal position;

one end of the second rope is connected to the periphery of the hanging scaffold, the other end of the second rope is connected to the periphery of the flat plate, the hanging scaffold is lifted, and the flat plate can be hung up through the second rope;

and the pneumatic locking device is used for locking the flat plate on the table top of the vibration test.

According to an embodiment of the invention, the lifting hook further comprises a pulley, the lifting hook comprises a body and a hook head connected to the body, the pulley is arranged in the hook head and is in sliding fit with the inner surface of the hook head, and one end of the first rope is fixedly arranged on the pulley in a penetrating way.

According to an embodiment of the present invention, the direction of the gravity of the hook and the direction of the perpendicular to the hanging point of the sheave are located on both sides of the direction of the perpendicular to the hanging point of the hook, and the opening direction of the hook head is directed toward the direction of the perpendicular to the hanging point of the hook.

According to one embodiment of the invention, the pneumatic locking device comprises a cylinder and an extension rod, and the cylinder controls the extension rod to move along the horizontal direction.

According to one embodiment of the invention, a self-locking inclined surface is arranged on the periphery of the flat plate, the cylinder pushes the extension rod to extend outwards, and the front end of the extension rod is matched and fixed with the self-locking inclined surface, so that the flat plate is locked on a table top of a vibration test.

According to one embodiment of the invention, during the vibration test of the power battery, the first rope is in a tensioned state and the second rope is in a non-tensioned state.

According to one embodiment of the invention, during the vibration test of the power cell, P1 × L1 × P2 × L2 is satisfied;

wherein, the gravity direction of lifting hook with the perpendicular distance of the perpendicular direction of lifting hook hoisting starting point is L1, the perpendicular distance of the perpendicular direction of the lifting point of pulley and the perpendicular direction of lifting hook hoisting starting point is L2, the weight of lifting hook is P1, the weight that the lifting hook bore is P2.

According to one embodiment of the invention, said first and second ropes are steel cords.

According to the safety testing device provided by the invention, the power battery is locked or released by the pneumatic locking device, so that the abnormal power battery can be lifted and separated from the vibration rack in time, and the testing safety is improved.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

fig. 1 shows a schematic structural diagram of a safety testing device according to an embodiment of the present invention in a vibration test state.

Fig. 2 is a schematic structural diagram of a safety testing device according to an embodiment of the present invention in a state of lifting a power battery.

FIG. 3 is a schematic view showing a state where a hook of the safety testing device is disengaged from a power battery according to an embodiment of the present invention

Wherein the figures include the following reference numerals:

safety testing device 100 power battery 101

Flat plate 102 hook 103

First rope 105 of hanging scaffold 104

Pneumatic locking device 107 for second rope 106

Pulley 108 body 109

Hook head 110 lifting point 111

Lifting point 112 cylinder 113

Extension bar 114 self-locking ramp 115

Counter 116 sink 117

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 shows a schematic structural diagram of a safety testing device according to an embodiment of the present invention in a vibration test state. Fig. 2 is a schematic structural diagram of a safety testing device according to an embodiment of the present invention in a state of lifting a power battery. Fig. 3 shows a vibration test safety testing device 100 suitable for a power battery 101 as shown in a state where a hook of the safety testing device according to an embodiment of the present invention is detached from the power battery. The power battery 101 is fixedly arranged on a flat plate 102. The safety testing device 100 mainly comprises a hook 103, a hanging scaffold 104, a first rope 105, a second rope 106 and a pneumatic locking device 107.

The hanging scaffold 104 is located above the power battery 101 and below the hook 103.

A first line 105 is attached at one end to the hook 103 and at the other end to the periphery of the platform 104. The hook 103 is able to lift the platform 104 to a horizontal position by means of a first rope 105. It is easy to understand that a plurality of first ropes 105 can be arranged and connected between the lifting hook 103 and the hanging scaffold 104, and the connection points of the plurality of ropes and the hanging scaffold 104 are uniformly distributed on the periphery of the hanging scaffold 104, or a first rope 105 is continuously arranged and penetrated on a plurality of connection points on the periphery of the lifting hook 103 and the hanging scaffold 104, and the hanging scaffold 104 can be in a horizontal position after being lifted.

A second rope 106 is connected at one end to the periphery of the bottom surface of the platform 104 and at the other end to the periphery of the platform 102, and the platform 102 can be lifted by lifting the platform 104 via the second rope 106. Similarly, a plurality of second ropes 106 may be connected between the platform 104 and the plate 102, or one second rope 106 may be continuously threaded through a plurality of connection points around the platform 104 and the plate 102, both of which may enable the platform 104 and the plate 102 to be lifted in a substantially horizontal position.

Pneumatic locking device 107 is used to lock plate 102 to the table of the vibration test. In this embodiment, a plurality of pneumatic locking devices 107 are provided, arranged around the periphery of the plate 102. The pneumatic locking device 107 can be switched between two states, locking and releasing. In the locked state, the flat plate 102 is fixed on the table 116 of the vibration test, and the test position of the power battery 101 is maintained. In the released state, the power battery 101 and the plate 102 can be detached from the table 116 and can be lifted in the vertical direction.

Preferably, the safety testing device 100 further includes a pulley 108. The hook 103 includes a body 109 and a hook head 110 connected to the body 109, and the pulley 108 is disposed in the hook head 110 and slidably engaged with an inner surface of the hook head 110. One end of the first rope 105 is fixed to the pulley 108, and a connection point of the first rope 105 and the pulley 108 is a hoisting point 111 of the pulley 108.

Preferably, the direction of the gravity of the hook 103 and the direction of the perpendicular to the hanging point 111 of the pulley 108 are located on both sides of the direction of the perpendicular to the hanging point 112 of the hook 103. In the test state and the lifting state of the power battery 101, the hook head 110 is positioned below the body 109, and the weight lifted by the hook head 110 and the self weight of the lifting hook 103 are balanced left and right at the lifting point 112 of the lifting hook 103. Further, the opening direction of the hook head 110 is directed to the perpendicular direction of the lifting point 112 of the hook 103. When the hook head 110 loses the hanging weight, under the action of the gravity of the hook 103, the body 109 rotates downwards along the hanging point 112, so that the hook head 110 rotates outwards and upwards, the pulley 108 is separated from the hook head 110, and the automatic separation of the hook head 110 and the pulley 108 is completed. The automatic disengagement process will be described in detail later with reference to the accompanying drawings.

Preferably, the pneumatic locking device 107 comprises a cylinder 113 and an extension rod 114. The cylinder 113 controls the extension bar 114 to move in the horizontal direction to lock or release the tablet 102. More preferably, a self-locking ramp 115 is provided at the periphery of the plate 102. The cylinder 113 pushes the extension rod 114 to extend outwards, and the front end of the extension rod 114 is matched and fixed with the self-locking inclined surface 115, so that the flat plate 102 is locked on a table top 116 of the vibration test.

Preferably, during the vibration test of the power battery 101, the first rope 105 is in a tensioned state and the second rope 106 is in a non-tensioned state. The first line 105 is under tension and the hook 103 carries the weight of the platform 104 via the pulley 108. The second rope 106 is in a non-tensioned state and the hook 103 does not need to carry the weight of the power battery 101.

Preferably, P1 × L1 — P2 × L2 is satisfied during the vibration test of the power battery 101. Wherein, the vertical distance between the gravity direction of the hook 103 and the vertical direction of the lifting point 112 of the hook 103 is L1, the vertical distance between the vertical direction of the lifting point 111 of the pulley 108 and the vertical direction of the lifting point 112 of the hook 103 is L2, the weight of the hook 103 is P1, and the weight borne by the hook 103 is P2. When the first rope 105 is in tension and the second rope 106 is in non-tension, P2 is the weight of the platform 104. When both the first rope 105 and the second rope 106 are under tension, P2 is the total weight of the hanging scaffold 104 and the power battery 101. Since the weight of the first rope 105, the second rope 106 and the platform 102 is much lower than the weight of the hanging scaffold 104 and the power battery 101, the weight of the first rope 105, the second rope 106 and the platform 102 may not be considered by P2.

Preferably, the first and second ropes 105, 106 are steel cords. The steel cable is firm and durable and is convenient to use.

The operation of a safety testing device 100 according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, a vibration test is prepared by placing a flat plate 102 on a table 116 of a vibration test and fixing a power battery 101 on the flat plate 102. Sheave 108, hook 103, hanging scaffold 104, first line 105 and second line 106 are assembled. And starting the pneumatic locking device 107, pushing the extension rod 114 to extend outwards by the air cylinder 113, and matching and fixing the front end of the extension rod 114 with the self-locking inclined surface 115 on the periphery of the flat plate 102, thereby locking the flat plate 102 on the table 116 of the vibration test. The hook 103 is lifted and the first line 105 is pulled up, bringing the platform 104 to a horizontal position, the first line 105 to a tensioned state and the second line 106 to an untensioned state. At this time, P1 × L1 × P2 × L2 is satisfied, where P2 is the weight of the platform 104. Because the second rope 106 is in a non-tensioned state, the second rope 106 does not carry the weight of the power battery 101.

Starting the vibration test, when the power battery 101 is in fire and explosion or other dangerous situations, referring to fig. 2, the pneumatic locking device 107 enters an unlocking state, the air source of the pneumatic locking device 107 is closed, the extension bar 114 is retracted, and the extension bar 114 is separated from the self-locking inclined plane 115 on the periphery of the flat plate 102. The hook 103 is lifted from the lifting point 112, the first rope 105 is in a tensioned state, and the hanging scaffold 104 is rapidly lifted, so that the second rope 106 is rapidly switched from a non-tensioned state to a tensioned state, and the power battery 101 is driven to be lifted. At this time, P1 × L1 × P2 × L2 is satisfied, where P2 is the weight of the hanging scaffold 104 and the power battery 101. Because the second rope 106 is also under tension, the hook 103 carries the weight of the hanging scaffold 104 and the power battery 101. The distance value of L2 is reduced by the cooperation of pulley 108.

Referring to fig. 3, the power battery 101 is suspended above the water tank 117 by the hook 103, and the hook 103 is lowered to sink the power battery 101 into the water tank, so as to achieve a fire extinguishing effect as soon as possible. The hook 103 continues to descend and when the first line 105 is under non-tension, the hook head 110 loses all the hanging weight, and under the weight of the hook 103, the body 109 rotates downward along the hanging point 112 under the weight of the hook 103, so that the hook head 110 rotates outward and upward. When the hook head 110 is rotated to a certain position, the pulley 108 is disengaged from the hook head 110, and the automatic disengagement of the hook 103 from the power battery 101 is completed. As shown, the body 109 rotates under gravity to the bottom of the hook 103 and the hook head 110 rotates to the top of the hook 103.

The safety testing device provided by the invention has the following characteristics:

1. the pneumatic locking device is adopted to replace a traditional clamp and a bolt to fix the flat plate on the table top of the vibration test, and the locking device can be released and started to quickly suspend the power battery when danger occurs.

2. In the vibration test process, the first rope is in a tensioning state and the second rope is in a non-tensioning state, so that the power battery can be hoisted more quickly and stably when danger occurs.

3. After the power battery which is combusted and exploded is hung to the water pool, the unhooking can be automatically completed, and the device is convenient and quick.

4. The whole structure is compact, and the damage to the human body and the property is avoided.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (8)

1. A safety testing device is suitable for vibration test of a power battery, the power battery is fixedly arranged on a flat plate, the safety testing device comprises,

the hanging scaffold is positioned above the power battery;

one end of the first rope is connected with the lifting hook, and the other end of the first rope is connected with the periphery of the hanging scaffold so that the hanging scaffold is lifted by the lifting hook to a horizontal position;

one end of the second rope is connected to the periphery of the hanging scaffold, the other end of the second rope is connected to the periphery of the flat plate, the hanging scaffold is lifted, and the flat plate can be hung up through the second rope;

and the pneumatic locking device is used for locking the flat plate on the table top of the vibration test.

2. The safety testing device of claim 1, further comprising a pulley, wherein the hook comprises a body and a hook head connected to the body, the pulley is disposed in the hook head and slidably engaged with an inner surface of the hook head, and one end of the first rope is fixed to the pulley.

3. The safety testing device according to claim 2, wherein the gravity direction of the hook and the perpendicular direction of the hanging point of the pulley are located on both sides of the perpendicular direction of the hanging point of the hook, and the opening direction of the hook head is directed toward the perpendicular direction of the hanging point of the hook.

4. The safety tester of claim 1, wherein the pneumatic locking device comprises an air cylinder and an extension rod, the air cylinder controlling the extension rod to move in a horizontal direction.

5. The safety testing device according to claim 4, wherein a self-locking inclined surface is arranged on the periphery of the flat plate, the cylinder pushes the extension rod to extend outwards, and the front end of the extension rod is matched and fixed with the self-locking inclined surface, so that the flat plate is locked on a table top of a vibration test.

6. The safety testing device of claim 2, wherein the first rope is in tension and the second rope is in non-tension during a vibration test of the power cell.

7. The safety testing device of claim 6, wherein during vibration testing of the power cell, P1L 1P 2L 2 is satisfied;

wherein, the gravity direction of lifting hook with the perpendicular distance of the perpendicular direction of lifting hook hoisting starting point is L1, the perpendicular distance of the perpendicular direction of the lifting point of pulley and the perpendicular direction of lifting hook hoisting starting point is L2, the weight of lifting hook is P1, the weight that the lifting hook bore is P2.

8. The safety testing device of claim 6, wherein the first and second ropes are steel cords.

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