Fire extinguishing system for lithium battery of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle auxiliary equipment, in particular to a fire extinguishing system for an electric vehicle lithium battery, which comprises a battery module and a fire extinguishing module, a detection module is arranged between the battery module and the fire extinguishing module, the battery module comprises a battery bin and a storage battery, a spraying pipe group is arranged at the top of the battery bin, and the fire extinguishing module comprises a storage tank. A conveying pipe is arranged on the storage tank, an electromagnetic valve is arranged at the joint of the conveying pipe and the storage tank, the detection module comprises a controller, a detection assembly connected with the controller is arranged in the battery bin, the electromagnetic valve is electrically connected with the controller, and the detection assembly detects parameters in the battery bin in real time and feeds back signals to the controller when abnormal conditions occur. And finally, the fire extinguishing agent enters the battery bin through the conveying pipe for fire extinguishing operation, so that the loss caused by spontaneous combustion of the battery can be greatly reduced, and the use safety of the lithium battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle auxiliary equipment technical field, concretely relates to a kind of for two-wheel or electric vehicle lithium battery fire extinguishing system. BACKGROUND

[0002] In the current traffic field, those electric vehicles using lithium battery as power source, whether it is common two-wheel style or practical three-wheel vehicle, most of them have a security short board that cannot be ignored, that is, they are not equipped with automatic fire prevention and fire extinguishing functions and devices.

[0003] When these electric vehicles unfortunately encounter fire, the owner or surrounding personnel often fall into a rather passive situation. Because they cannot automatically start the fire extinguishing program to contain the spread of fire at the beginning of the fire like some vehicles with advanced fire fighting system, they can only rely on the external fire extinguisher equipped in the environment to try to extinguish the fire.

[0004] However, once the lithium battery catches fire, the fire extinguishing work has special requirements. It is known that the combustion characteristics of lithium battery after fire are quite different from ordinary flammable material fire. The chemical reaction involved in its combustion and fire development are relatively complex. If you want to effectively extinguish the lithium battery in the combustion state, you must use a special fire extinguisher designed for the characteristics of lithium battery fire. The principle of extinguishing fire and the composition of extinguishing agent of the conventional type of fire extinguisher such as dry powder fire extinguisher and carbon dioxide fire extinguisher we often see in daily life are designed based on extinguishing ordinary solid, liquid or gas fire, and do not have the ability to extinguish lithium battery fire. So when facing lithium battery fire, conventional fire extinguishers often do not have the desired extinguishing effect, which undoubtedly adds great difficulty and challenge to the lithium battery electric vehicle fire fighting work. Especially during driving or charging, if the fire phenomenon of lithium battery cannot be found in time, it will cause greater loss. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above problems, the utility model embodiment provides a kind of lithium battery fire extinguishing system with early warning and fire extinguishing function for electric vehicle, which can implement early warning and fire extinguishing measures when lithium battery appears abnormal, to reduce the loss caused by lithium battery naturally.

[0006] The utility model discloses an embodiment for realizing the above -mentioned purpose, specifically adopts following technical scheme: a kind of lithium battery extinguishing system for electric vehicle, including battery module and extinguishing module, detection module is arranged between the battery module and extinguishing module, the battery module includes battery compartment, storage battery is provided in the battery compartment, spray pipe group is provided in the battery compartment, the extinguishing module includes the storage tank for placing fire extinguishing agent, conveying pipe connected with spray pipe group is provided on the storage tank, solenoid valve is provided at the connecting place of conveying pipe and storage tank, the detection module includes controller, detection assembly connected with controller is provided in the battery compartment, the solenoid valve is electrically connected with controller.

[0007] As further improvement of the above technical solution:

[0008] The detection assembly includes temperature sensor and odor sensor electrically connected with the controller.

[0009] Alarm connected with the controller is provided outside the battery compartment.

[0010] The spray pipe group includes main pipeline arranged above the storage battery, branch pipeline is arranged on the both sides of the main pipeline.

[0011] The branch pipeline is in L shape distribution, one end of each branch pipeline is connected with the main pipeline, and the other end extends to the side wall of the battery compartment, and the branch pipeline is provided with spray opening towards the storage battery.

[0012] One side wall of the battery compartment is provided with through hole for installing conveying pipe, and sealing plug is arranged outside the through hole.

[0013] The utility model discloses an embodiment, and the beneficial effects are as follows: the lithium battery extinguishing system for electric vehicle, including battery module and extinguishing module, detection module is arranged between the battery module and extinguishing module, the battery module includes battery compartment, storage battery is installed in the battery compartment, spray pipe group is provided at the top of the battery compartment, the extinguishing module includes the storage tank for placing fire extinguishing agent, conveying pipe connected with spray pipe group is provided on the storage tank, solenoid valve is provided at the connecting place of conveying pipe and storage tank, the detection module includes controller, detection assembly connected with controller is provided in the battery compartment, the solenoid valve is electrically connected with controller, detection assembly is through to the parameter in battery compartment Real -time detection, when abnormal situation appears, feedback signal to controller, controller sends instruction to solenoid valve again, and finally fire extinguishing agent enters battery compartment and carries out fire extinguishing operation through conveying pipe, the safety performance that can effectively improve electric vehicle use is obtained through the extinguishing system, especially in hot environment, the loss brought by battery spontaneous combustion can be greatly reduced, and the use safety of lithium battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the sectional view of embodiment 1.

[0015] Figure 2 This is a schematic diagram of the overall structure in Example 1;

[0016] Figure 3 This is a schematic diagram of the spray pipe assembly in Example 1;

[0017] Figure 4 This is a schematic diagram of the battery module installation structure in Example 2.

[0018] In the diagram: 1. Battery module; 2. Fire extinguishing module; 3. Detection module; 4. Battery compartment; 5. Battery; 6. Storage tank; 7. Delivery pipe; 8. Solenoid valve; 9. Controller; 10. Alarm; 11. Main pipe; 12. Branch pipe; 13. Sprinkler nozzle; 14. Through hole; 15. Sealing plug. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] Example 1

[0021] like Figures 1-3 As shown, the fire extinguishing system for electric vehicle lithium batteries in this embodiment includes a battery module 1 and a fire extinguishing module 2. A detection module 3 is provided between the battery module 1 and the fire extinguishing module 2. The battery module 1 includes a battery compartment 4, in which a storage battery 5 is installed. A spray pipe assembly is provided on the top of the battery compartment 4. The fire extinguishing module 2 includes a storage tank 6 for storing a fire extinguishing agent. The fire extinguishing agent is perfluorohexanone, which has the advantages of easy volatility and high heat absorption efficiency. A delivery pipe 7 connected to the spray pipe assembly is provided on the storage tank 6. A solenoid valve 8 is provided at the connection between the delivery pipe 7 and the storage tank 6. The detection module 3... The system includes a controller 9 and a detection component connected to the controller 9 inside the battery compartment 4. A solenoid valve 8 is electrically connected to the controller 9. The detection component monitors the parameters inside the battery compartment 4 in real time. When an abnormality occurs, it sends a signal back to the controller 9. The controller 9 then sends a command to the solenoid valve 8. Finally, the fire extinguishing agent enters the battery compartment 4 through the delivery pipe 7 to extinguish the fire. This fire extinguishing system can effectively improve the safety performance of electric vehicles, especially in hot weather, and can greatly reduce the losses caused by battery spontaneous combustion, thus improving the safety of lithium batteries.

[0022] The detection assembly includes a temperature sensor and an odor sensor electrically connected with the controller 9. The temperature sensor is used to detect the overall temperature in the battery compartment 4. When the temperature exceeds a set value, a signal will be transmitted to the controller 9, and then the electromagnetic valve 8 will start the fire extinguishing operation on the battery 5. A small amount of fire extinguishing agent will be sprayed for cooling at the first temperature warning. If the temperature cannot be reduced, the fire extinguishing agent will be sprayed into the battery compartment 4. When lithium ions crystallize in the lithium battery cell, the lithium battery electrolyte will produce a large amount of gas, which will expand and break the packaging paper of the cell to release the odor. After the odor sensor detects the odor, a signal will be transmitted to the controller 9, and then the electromagnetic valve 8 will start the fire extinguishing operation on the battery 5.

[0023] The outside of the battery compartment 4 is provided with an alarm 10 connected with the controller 9. When the fire extinguishing operation is performed, the controller 9 will send a command to the alarm 10 to issue a warning sound to prompt people.

[0024] The spray pipe group includes a main pipe 11 installed above the battery 5. The two sides of the main pipe 11 are provided with branch pipes 12. Each two branch pipes 12 form a group. A plurality of groups of branch pipes 12 are installed on the two sides of the main pipe 11 along the length direction.

[0025] The branch pipe 12 is in L-shaped distribution. One end of each branch pipe 12 is connected with the main pipe 11, and the other end extends to the side wall of the battery compartment 4. The branch pipe 12 is provided with a spray opening 13 facing the battery 5. The design of the main pipe 11 and the branch pipe 12 can increase the diffusion area of the fire extinguishing agent and improve the fire extinguishing effect.

[0026] A through hole 14 for installing the delivery pipe 7 is arranged on one side wall of the battery compartment 4. A sealing plug 15 is arranged outside the through hole 14. The delivery pipe 7 and the wire harness of the sensor are inserted into the through hole 14. The sealing plug 15 can seal the through hole 14 after the delivery pipe 7 and the wire harness are installed.

[0027] The working principle / assembly process of the present scheme: Based on the existing electric vehicle, the lithium battery fire extinguishing system is added. Taking the existing two-wheeled electric vehicle as an example, the storage tank 6 is placed in the seat. Since there is a connecting line between the original electric vehicle seat and the battery compartment 4 (i.e. there is an opening), it is not necessary to re-open the hole. The delivery pipe 7 is inserted into the battery compartment 4 from the original hole. The spray pipe group is installed on the top cover of the battery compartment 4 in advance. After the delivery pipe 7 is inserted, it is connected with the spray pipe group. Then, the sensors are placed in the battery compartment 4. Finally, the top cover of the battery compartment 4 is sealed. After the controller 9 is electrically connected with the sensors, the electromagnetic valve 8 and the alarm 10, the installation of the fire extinguishing system on the existing electric vehicle is completed.

[0028] Example 2

[0029] The same as example 1, the difference is that, as shown in the figure, the fire extinguishing system provided by the embodiment is a pre-installed fire extinguishing system designed in an integrated manner with the battery, that is, the battery is assembled and produced together with the fire extinguishing system and then connected with the trolley frame for use. Figure 4 The same as example 1, the difference is that, as shown in the figure, the fire extinguishing system provided by the embodiment is a pre-installed fire extinguishing system designed in an integrated manner with the battery, that is, the battery is assembled and produced together with the fire extinguishing system and then connected with the trolley frame for use.

[0030] It should be noted that, in the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in the process, article or equipment / device.

[0033] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. The person skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A fire extinguishing system for an electric vehicle lithium battery, characterized by: The application relates to a battery fire extinguishing device, which comprises a battery module (1) and a fire extinguishing module (2), wherein a detection module (3) is arranged between the battery module (1) and the fire extinguishing module (2). The battery module (1) comprises a battery compartment (4), wherein a storage battery (5) is arranged in the battery compartment (4), and a spray pipe group is arranged in the battery compartment (4). The fire extinguishing module (2) comprises a storage tank (6) for placing a fire extinguishing agent, wherein a conveying pipe (7) connected with the spray pipe group is arranged on the storage tank (6), and an electromagnetic valve (8) is arranged at the connection position of the conveying pipe (7) and the storage tank (6). The detection module (3) comprises a controller (9), wherein a detection assembly connected with the controller (9) is arranged in the battery compartment (4), and the electromagnetic valve (8) is electrically connected with the controller (9).

2. The fire extinguishing system for electric vehicle lithium battery according to claim 1, characterized in that: The detection assembly comprises a temperature sensor and a smell sensor which are electrically connected with the controller (9).

3. The electric vehicle lithium battery fire extinguishing system of claim 1, wherein: An alarm (10) connected with the controller (9) is arranged outside the battery compartment (4).

4. The fire extinguishing system for electric vehicle lithium battery according to claim 1, characterized in that: The spray pipe group comprises a main pipe (11) arranged above the storage battery (5), and branch pipes (12) are arranged on both sides of the main pipe (11).

5. The fire extinguishing system for electric vehicle lithium battery according to claim 4, characterized in that: The branch pipes (12) are arranged in an L shape, one end of each branch pipe (12) is connected with the main pipe (11), the other end of each branch pipe (12) extends to the side wall of the battery compartment (4), and a spray opening (13) facing the storage battery (5) is arranged on each branch pipe (12).

6. The electric vehicle lithium battery fire extinguishing system of claim 1, wherein: A through hole (14) for mounting the conveying pipe (7) is arranged on one side wall of the battery compartment (4), and a sealing plug (15) is arranged outside the through hole (14).

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