Anti-collision device for battery compartment of pure electric bus

Abstract

The utility model discloses an anti-collision device for a battery compartment of a pure electric bus, which relates to the technical field of anti-collision devices, and comprises a protective shell, a battery mounting compartment, an anti-collision device, an anti-collision device, an anti-collision device and an anti-collision device, and is characterized in that a sealing cover is fixedly arranged at the top of the protective shell; the inner protective shell coaxially sleeves the outer side of the battery mounting cabin, and an annular cavity is formed between the inner protective shell and the protective shell; the baffle is radially arranged in the annular cavity and divides the annular cavity into a first protective cavity and a second protective cavity; the first air bag and the second air bag are respectively arranged in the first protective cavity and the second protective cavity, and the first air bag and the second air bag realize air communication through an air guide pipeline; the first air bag and the second air bag are naturally inflated and expanded and are attached to the inner wall and the outer wall, when any air bag is extruded, the internal pressure of the air bag is increased, and air is extruded to the other air bag through the air guide pipeline, so that impact force is dispersed along the annular cavity, a battery compartment is prevented from locally bearing overlarge impact force, and the risk that a battery pack is damaged due to concentrated stress is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an anti -collision device technical field, specifically is a kind of pure electric bus battery cabin is used anti -collision device. BACKGROUND

[0002] With the growing demand for environmental protection travel in the world, pure electric bus as a kind of clean, efficient public transport, has been widely used in urban traffic. However, the safety problem of its battery cabin has been the focus of the industry.

[0003] In the daily operation process, pure electric bus faces complex and changeable road environment. Collision between vehicles, scratch with road obstacles and battery cabin component vibration caused by road bumps occur from time to time. Battery cabin as the core area of battery pack, once subjected to external impact, the consequence is unbearable. The battery in battery pack may be damaged when subjected to severe impact, resulting in battery short circuit, fire and even explosion, not only will cause serious damage to the vehicle, but also may endanger the life safety of passengers and pedestrians.

[0004] At present, some pure electric buses on the market adopt relatively simple battery cabin protection measures. For example, some vehicles only set ordinary metal shell outside battery cabin. Although this shell can provide a certain degree of physical protection, it cannot effectively absorb and disperse impact energy when facing larger impact force, and it is difficult to avoid damage to battery pack inside battery cabin. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model provides a kind of pure electric bus battery cabin is used anti -collision device.

[0006] In order to realize the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A kind of pure electric bus battery cabin is used anti -collision device, comprising:

[0008] Protective shell, its top is fixedly arranged with cover, the protective shell inside forms battery installation cabin;

[0009] Inner shell, coaxial sleeve is set in the outside of the battery installation cabin and forms annular cavity between protective shell;

[0010] Baffle, it is radially arranged in the annular cavity, and the annular cavity is divided into first protective cavity and second protective cavity;

[0011] First gasbag and second gasbag are arranged in the first protective cavity and second protective cavity respectively, and the first gasbag and second gasbag realize gas intercommunication by gas guide pipeline;

[0012] The first gasbag and second gasbag are configured as:

[0013] When any one of the air bags is subjected to external extrusion force, the pressure is transmitted to the other air bag through the gas guide pipeline, so that the impact force is dispersed along the annular cavity between the protective shell and the inner shell.

[0014] Preferably, the first air bag and the second air bag are filled with fire extinguishing agent in the bag body, and the air bag surface is provided with a predetermined breaking line, and the inner shell is provided with a hollow groove corresponding to the position of the predetermined breaking line.

[0015] Preferably, the fire extinguishing agent is perfluorohexanone fire extinguishing agent, which is uniformly dispersed in the form of microcapsules in the air bag body.

[0016] Preferably, the outer surface of the protective shell is provided with an energy absorption layer made of honeycomb aluminum structure or gradient foam metal material.

[0017] Preferably, the first air bag and the second air bag are in a natural state of inflation and expansion, and the first air bag and the second air bag are attached to the inner wall of the protective shell and the outer wall of the inner shell.

[0018] Preferably, the baffle is arranged in an X-shaped manner, and one end of the baffle is fixed to the inner wall of the protective shell, and the other end of the baffle is fixedly connected to the outer wall of the inner shell.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. High energy absorption: the energy absorption layer on the outer surface of the protective shell is made of honeycomb aluminum structure or gradient foam metal material; when the vehicle is subjected to impact, these materials convert the impact kinetic energy into internal energy through plastic deformation of their own microstructure, greatly reducing the energy transmitted to the battery compartment, reducing the impact force intensity of the subsequent structure, and effectively protecting the battery compartment.

[0021] 2. Uniformly dispersed impact force: the first air bag and the second air bag are naturally inflated and expanded and attached to the inner and outer walls, and when any one of the air bags is extruded, the internal pressure rises and the gas is extruded to the other air bag through the gas guide pipeline, so that the impact force is dispersed along the annular cavity, avoiding that the battery compartment locally bears excessive impact force and reducing the risk of damage to the battery pack due to concentrated stress.

[0022] 3. Timely fire extinguishing to ensure safety: when the air bag is broken due to severe impact, the perfluorohexanone fire extinguishing agent filled in the form of microcapsules in the bag body can be rapidly and uniformly released through the hollow groove at the corresponding position of the inner shell; the fire extinguishing agent has excellent fire extinguishing performance, and can reduce the temperature of the combustion area and isolate oxygen through physical and chemical action, timely extinguishing the battery fire that may be caused by impact, avoiding the spread of fire, and providing the last safety guarantee for the battery compartment. BRIEF DESCRIPTION OF DRAWINGS

[0023] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0024] Figure 1 It is a three-dimensional structure schematic diagram of the anti-collision device for the battery cabin of the pure electric bus of the present application.

[0025] Figure 2 It is an internal structure schematic diagram of the anti-collision device for the battery cabin of the pure electric bus of the present application.

[0026] Figure 3 It is a front view of the anti-collision device for the battery cabin of the pure electric bus of the present application.

[0027] Figure 4 It is an A-A sectional view of the anti-collision device for the battery cabin of the pure electric bus of the present application.

[0028] The figure is marked as follows: 1, protective shell; 2, cover; 3, battery mounting cabin; 4, inner protective shell; 5, baffle; 6, first protective cavity; 7, second protective cavity; 8, first air bag; 9, second air bag; 91, fire extinguishing agent. DETAILED DESCRIPTION

[0029] It is easy to understand that according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application.

[0030] EMBODIMENT

[0031] As Figures 1-4 shown, an anti-collision device for the battery cabin of a pure electric bus, comprising a protective shell 1, a cover 2, a battery mounting cabin 3, an inner protective shell 4, a baffle 5, a first protective cavity 6, a second protective cavity 7, a first air bag 8, a second air bag 9, and a fire extinguishing agent 91.

[0032] The protective shell 1 and the cover 2: the protective shell 1 of the present anti-collision device is fixedly provided with a cover 2 at the top, and the protective shell 1 forms a battery mounting cabin 3 inside for accommodating a battery pack. The protective shell 1 serves as the outermost protective structure of the whole device, and plays a basic physical protection role for the battery cabin.

[0033] The inner protective shell 4: the inner protective shell 4 is coaxially sleeved outside the battery mounting cabin 3, and forms an annular cavity between the protective shell 1. The annular cavity provides space for the subsequent buffer and energy dispersion structure.

[0034] Baffle 5: The baffle 5 is radially arranged in the annular cavity, which divides the annular cavity into the first cavity 6 and the second cavity 7. The baffle 5 is arranged in an X-shaped manner, and one end of the baffle 5 is fixed to the inner wall of the protective shell 1, and the other end is fixedly connected to the outer wall of the inner shell 4. This structure enhances the structural stability of the overall device.

[0035] Air bag system: Air bag layout and communication: The first air bag 8 and the second air bag 9 are arranged in the first cavity 6 and the second cavity 7 respectively, and the first air bag 8 and the second air bag 9 are connected by a gas guide pipeline to realize gas communication. When any air bag is subjected to external extrusion force, the pressure is transmitted to the other air bag through the gas guide pipeline, so that the impact force can be dispersed along the annular cavity between the protective shell 1 and the inner shell 4, thereby effectively reducing the impact force on the local part and protecting the battery pack in the battery compartment.

[0036] Fire extinguishing agent filling: The air bag body of the first air bag 8 and the second air bag 9 is filled with fire extinguishing agent 91. When the air bag is impacted and the predetermined breaking line on the surface is broken, the inner shell 4 is provided with a hollow groove corresponding to the position of the predetermined breaking line, so that the fire extinguishing agent 91 can be quickly released to extinguish the fire of the battery caused by the impact, further ensuring the safety of the battery compartment. The fire extinguishing agent 91 in the device is a perfluorohexanone fire extinguishing agent, which is uniformly dispersed in the air bag body in the form of microcapsules. This form helps the fire extinguishing agent to play a more uniform fire extinguishing role when released.

[0037] Energy absorption layer: The outer surface of the protective shell 1 is provided with an energy absorption layer made of honeycomb aluminum structure or gradient foam metal material. These materials have good energy absorption characteristics. When the vehicle is impacted, the energy absorption layer can first absorb part of the impact energy, reducing the energy transmitted to the battery compartment, thereby improving the protection performance of the entire anti-collision device.

[0038] Initial state of air bag: The first air bag 8 and the second air bag 9 are in a natural state of inflation and expansion, and the first air bag 8 and the second air bag 9 are in close contact with the inner wall of the protective shell 1 and the outer wall of the inner shell 4. This initial state allows the air bag to play a certain buffering role when it is not impacted, and quickly responds when it is impacted by dispersing and absorbing energy through gas communication and air bag deformation.

[0039] Initial impact: Energy absorption layer plays a role

[0040] When a pure electric bus is involved in a crash, the first point of contact with the external impact force is the energy absorbing layer on the outer surface of the protective shell 1. This energy absorbing layer is made of honeycomb aluminum structure or gradient foam metal material, which has a unique microstructure and mechanical properties. The honeycomb cells of the honeycomb aluminum structure and the pore structure inside the gradient foam metal material can plastically deform when impacted. Through this deformation, the energy absorbing layer converts part of the kinetic energy generated by the impact into internal energy of the material, thereby effectively reducing the energy transmitted to the battery compartment. For example, the honeycomb walls of the honeycomb aluminum structure are gradually extruded and bent under the action of impact force, and the pores of the gradient foam metal material are compressed. A large amount of impact energy is absorbed in this process, reducing the impact force intensity that the subsequent structure bears.

[0041] Crash continues: airbag system disperses energy

[0042] As the impact force passes through the energy absorbing layer, it acts on the protective shell 1. At this time, the airbag system located in the annular cavity between the protective shell 1 and the inner shell 4 begins to play a key role. Since the first airbag 8 and the second airbag 9 are in a naturally inflated state and are attached to the inner wall of the protective shell 1 and the outer wall of the inner shell 4, they can immediately respond to the impact force.

[0043] When the impact force causes the first airbag 8 in the first cavity 6 or the second airbag 9 in the second cavity 7 to be extruded, the internal pressure of the airbag instantaneously rises. Because the first airbag 8 and the second airbag 9 are connected by a gas guide pipeline, the airbag with rising pressure will extrude part of the gas to the other airbag through the gas guide pipeline. For example, if the first airbag 8 is extruded by impact, the gas inside it will quickly flow to the second airbag 9, causing the second airbag 9 to also deform and expand. In this process, the impact force is dispersed in a larger spatial range along the annular cavity between the protective shell 1 and the inner shell 4 through the gas exchange and deformation of the two airbags, avoiding the local area of the battery compartment from bearing excessive impact force and greatly reducing the risk of damage to the battery pack due to concentrated stress.

[0044] Crash extreme case: fire extinguishing agent starts fire extinguishing

[0045] In the case of a serious crash, the predetermined breaking line on the surface of the airbag may break due to excessive impact force. Since the first airbag 8 and the second airbag 9 are filled with perfluorohexone fire extinguishing agent 91 in the form of microcapsules, when the airbag breaks, the hollow slot opened on the inner shell 4 corresponding to the predetermined breaking line position becomes a channel for the release of the fire extinguishing agent.

[0046] The perfluorohexanone extinguishing agent 91 has excellent extinguishing performance, and its microcapsule form ensures that the extinguishing agent is stably present in the airbag under normal circumstances, and can be quickly and uniformly released when the airbag is broken. Once released, the perfluorohexanone extinguishing agent 91 can quickly suppress the combustion reaction, reduce the temperature of the combustion area through physical and chemical effects, and isolate oxygen, thereby timely extinguishing the fire caused by the short circuit of the battery due to the impact and the like, providing the last safety guarantee for the battery compartment, and avoiding further spread of the fire to cause more serious consequences.

[0047] The technical scope of the utility model is not only limited to the content in the above description, and the person skilled in the art can make various deformations and modifications to the above embodiment without departing from the technical thought of the utility model, and these deformations and modifications should all belong to the protection scope of the utility model.

Claims

1. A pure electric bus battery compartment anti-collision device, characterized in that, The utility model relates to a protective shell (1) is provided with the cover (2) at the top, and the protective shell (1) forms the battery installation cabin (3) inside, and the inner shell (4) is coaxially sleeved outside the battery installation cabin (3) and forms the annular cavity between the protective shell (1), and the baffle (5) is radially arranged in the annular cavity and separates the annular cavity into the first protective cavity (6) and the second protective cavity (7), and the first gasbag (8) and the second gasbag (9) are arranged in the first protective cavity (6) and the second protective cavity (7) respectively, and the first gasbag (8) and the second gasbag (9) realize the gas intercommunication through the gas guide pipeline, When any gasbag is extruded by the external pressure, the pressure is transmitted to the other gasbag through the gas guide pipeline, so that the impact force is dispersed along the annular cavity between the protective shell (1) and the inner shell (4). The gasbag body of the first gasbag (8) and the second gasbag (9) is filled with fire extinguishing agent (91), the gasbag surface is provided with the predetermined breaking line, and the inner shell (4) is provided with the hollow groove at the position corresponding to the predetermined breaking line. The fire extinguishing agent (91) is perfluorohexanone fire extinguishing agent, which is uniformly dispersed in the gasbag body in the form of microcapsule. The outer surface of the protective shell (1) is provided with an energy absorption layer made of honeycomb aluminum structure or gradient foam metal material. The first gasbag (8) and the second gasbag (9) are in the inflated state in the natural state, and the first gasbag (8) and the second gasbag (9) are attached to the inner wall of the protective shell (1) and the outer wall of the inner shell (4). The baffle (5) is arranged in X type, and one end of the baffle (5) is fixed to the inner wall of the protective shell (1), and the other end of the baffle (5) is fixedly connected to the outer wall of the inner shell (4).

2. The anti-collision device for battery compartment of pure electric bus according to claim 1, characterized in that: ​ 3. The anti-collision device for battery compartment of pure electric bus according to claim 2, characterized in that: ​ 4. The anti-collision device for battery compartment of pure electric bus according to claim 3, characterized in that: ​ 5. The anti-collision device for battery compartment of pure electric bus according to claim 4, characterized in that: ​ 6. The anti-collision device for battery compartment of an all-electric bus according to claim 5, characterized in that: ​

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