CN220306418U

CN220306418U - Battery pack with fire-fighting function

Info

Publication number: CN220306418U
Application number: CN202321848299.7U
Authority: CN
Inventors: 褚立; 吴细彬
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-01-05
Anticipated expiration: 2033-07-13

Abstract

The utility model relates to the technical field of battery packs. Especially, relate to a battery pack that possesses fire control function, including the box, hold the electricity core in the box, still include control module, pressure sensor, gas detector and fire control unit. The control module is in signal connection with the pressure sensor, the gas detector and the fire fighting device. The pressure sensor is used for monitoring the pressure change value in the box body. The gas detector is used for monitoring the concentration change value of the combustible gas in the box body. The fire-fighting device is installed in the box body and contains fire-fighting substances. When the pressure change value monitored by the pressure sensor exceeds the pressure change threshold value and the combustible gas concentration change value exceeds the combustible gas concentration change threshold value, the control module issues a fire control instruction to the fire control device. In response to the fire command, the fire device releases fire-fighting substances into the tank. The utility model can reduce the loss of life and property caused by the safety accident of the battery pack.

Description

Battery pack with fire-fighting function

Technical Field

The utility model relates to the technical field of battery packs, in particular to a battery pack with a fire-fighting function.

Background

The new energy battery has the advantages of wide working temperature range, long service life and the like due to high energy density, but the development of the new energy battery is restricted by the safety risk in the use process.

The automobile using the new energy battery is green and environment-friendly, has stable operation, good driving feeling and low use cost, but has obvious defects, namely, the battery pack is easy to fire and burn when the automobile has a safety accident. Because the battery pack fires and burns and is difficult to extinguish fire by the traditional fire-fighting means, the vehicle basically loses the value of maintenance and reuse after the battery pack fires and burns.

When the potential safety hazard or fire occurs in the battery core in the battery pack, the existing new energy vehicle can give a dangerous signal to the driver to remind people in the vehicle to escape in a specified time. Thus, although the life safety of personnel in the vehicle can be ensured, the battery pack is not subjected to any extinguishing measures, and only the battery pack can be burned, so that people or objects around the vehicle can be endangered, and great loss is caused. Therefore, there is a need for a device that can reduce the loss of battery pack safety accidents.

Disclosure of Invention

In order to reduce the loss of battery pack safety accidents, the application provides a battery pack with a fire-fighting function.

The battery pack with the fire-fighting function provided by the utility model adopts the following technical scheme:

the battery pack with the fire-fighting function comprises a box body, a control module, a pressure sensor, a gas detector and a fire-fighting device, wherein the box body is used for accommodating an electric core; the pressure sensor is arranged in the box body and is used for monitoring the pressure change value in the box body; the gas detector is arranged in the box body and is used for monitoring the concentration change value of the combustible gas in the box body; the fire-fighting device is arranged in the box body, and fire-fighting substances are contained in the fire-fighting device; the control module is in signal connection with the pressure sensor, the gas detector and the fire fighting device; the pressure sensor is used for sending a fire-fighting instruction to the fire-fighting device when the monitored pressure change value exceeds a pressure change threshold value and the combustible gas concentration change value exceeds a combustible gas concentration change threshold value; the fire-fighting device is used for releasing the fire-fighting substances into the box body when receiving the fire-fighting command.

Optionally, the fire-fighting device comprises a fire-fighting tank body and a valve;

the fire-fighting tank body is detachably arranged on the inner wall of the box body, and the fire-fighting substances are contained in the fire-fighting tank body; the valve is communicated with the fire-fighting tank body and is in signal connection with the control module, and is used for being opened when receiving the fire-fighting command, so that the fire-fighting substances are released into the tank body.

Optionally, the valve is a puncture valve.

Optionally, the fire-fighting substance is perfluoro hexanone or heptafluoropropane.

Optionally, the top of the box body is provided with an air hole; the ventilation holes are internally provided with ventilation valves, the ventilation valves can seal the ventilation holes, and the ventilation valves are in signal connection with the control module; the control module controls the opening and closing of the ventilation valve, and further controls the opening and closing of the ventilation holes.

Optionally, the control module has a timing sub-module that opens and closes the vent valve at regular intervals to vent the combustible gas from the tank.

Optionally, the ventilation valve is an electromagnetic valve.

Optionally, the pressure change threshold is between 1.1 and 1.2 atmospheres.

Optionally, the combustible gas concentration variation threshold is 500ppm.

Optionally, the control module is integrated within a battery management system of the vehicle

As described above, the present utility model has at least the following advantageous effects:

1. by monitoring the pressure and the concentration of the combustible gas in the box body, the utility model can control the danger in the box body at the beginning of the danger or the danger of the battery pack, and can effectively reduce the loss of life and property caused by the safety accident of the battery pack.

2. The battery pack with the fire-fighting function has the advantage of being not easy to cause safety accidents by discharging the fuel gas in the box body at regular time.

3. The battery pack with the fire-fighting function controls the danger in the fire-fighting device action processing box body through the control module only when the pressure change value and the combustible gas concentration change value are too large, so that the loss caused by the false action of the fire-fighting device can be reduced.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model for embodying the structure of a tank and exhaust vents.

Fig. 2 is a schematic view showing an internal structure of the case according to the embodiment of the present utility model.

Reference numerals: 1. a battery cell; 2. a case; 3. a pressure sensor; 4. a gas detector; 5. a fire fighting device; 51. a fire-fighting tank; 52. a valve; 53. a buckle; 6. and (5) ventilation holes.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1 and 2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Referring to fig. 1 and 2, the present utility model discloses a battery pack with fire protection function, which comprises a case 2, a control module, a pressure sensor 3, a gas detector 4 and a fire protection device 5. Wherein, box 2 is the cuboid type, and the inside cavity of box 2, electric core 1, pressure sensor 3, gas detector 4 and fire control unit 5 all hold in box 2.

The case 2 is sealed during normal operation. While the cell 1 generates a combustible gas slowly in its interior under normal operation. The combustible gas is mainly carbon monoxide and hydrogen, and the generation of the combustible gas is a characteristic of normal operation of the cell 1, which is difficult to avoid.

Referring to fig. 2, fig. 2 shows the internal structure of the battery pack with fire protection function according to the present utility model from a top view. The pressure sensor 3 is arranged on the inner side wall of the box body 2 and is used for monitoring the pressure change value in the box body 2 in real time, the pressure change value reflects the trend of pressure change in the box body 2, and when the pressure change value is overlarge, the potential safety hazard exists in the box body 2. In practical application, a pressure change threshold is set in the pressure sensor 3, and when the pressure change value exceeds the pressure change threshold, the potential safety hazard exists in the box body 2.

Specifically, the pressure change threshold is between 1.1 and 1.2 atmospheres, which may be 1.1 atmospheres, 1.15 atmospheres, and 1.2 atmospheres, and is preferably 1.1 atmospheres in this embodiment.

The gas detector 4 is installed on the inside wall of the box body 2 and is used for monitoring the concentration change value of the combustible gas in the box body 2 in real time, the concentration change value of the combustible gas reflects the change trend of the concentration of the gas in the box body 2, and when the concentration change value of the combustible gas is too large, the potential safety hazard in the box body 2 is reflected. In practical application, a flammable gas concentration change threshold is set in the gas detector 4, and when the flammable gas concentration change value exceeds the flammable gas concentration change threshold, the existence of potential safety hazards in the box body 2 is indicated. The combustible gas concentration variation threshold was 500ppm.

With continued reference to fig. 2, a fire fighting device 5 is mounted on the inner bottom wall of the tank 2, and includes a fire fighting tank 51 and a valve 52.

Specifically, the fire-fighting tank 51 is detachably mounted on the inner bottom wall of the box 2, in this embodiment, the fire-fighting tank 51 is restrained on the inner bottom wall of the box 2 by two buckles 53, and the buckles 53 are connected with the box 2 by bolts, so that the fire-fighting tank 51 is easy to mount and maintain. The valve 52 can close the fire-fighting tank 51, and when the valve 52 is opened, fire-fighting substances in the fire-fighting tank 51 can be released into the tank 2 to control the danger in the tank 2.

The control module is in signal connection with the pressure sensor 3, the gas concentration detector and the valve 52 of the fire fighting device 5. When the pressure sensor 3 detects that the pressure change value exceeds the pressure change threshold value and the gas concentration detector detects that the combustible gas concentration change value exceeds the combustible gas concentration change threshold value, the control module issues a fire-fighting command to the fire-fighting device 5, the control valve 52 is opened, fire-fighting substances in the fire-fighting tank 51 are released into the tank body 2, and danger in the tank body 2 is controlled. For ease of design and manufacture, the control module is integrated within a Battery Management System (BMS) of the vehicle.

More specifically, in this embodiment, the valve 52 of the fire protection device 5 is a puncture valve, which has the advantage of being able to be opened quickly, and when the control module issues a fire protection command to the fire protection device 5, the puncture valve is able to be opened quickly, so as to control the danger in the box 2 in time. In other embodiments of the present utility model, the valve 52 of the fire fighting device 5 may be a valve that can be automatically opened and closed, such as a solenoid valve.

Because the fire-fighting device 5 mainly deals with the condition that carbon monoxide and hydrogen are burnt, the fire-fighting substances in the fire-fighting tank body 51 can be perfluoro-hexanone or heptafluoropropane. The perfluorinated hexanone or heptafluoropropane is stored in the fire-fighting tank 51 after being pressurized, and when the valve 52 of the fire-fighting device 5 is opened, the perfluorinated hexanone or heptafluoropropane is automatically released into the tank 2 under the action of pressure. The perfluoro-hexanone or heptafluoropropane is an excellent fire extinguishing agent, does not pollute the protected object, and can prevent other parts in the box body 2 from being damaged while extinguishing fire. In other embodiments of the present utility model, the fire-fighting substance may be other fire-extinguishing agents that are effective in extinguishing fires without damaging other components within the housing 2.

The battery pack with the fire-fighting function can monitor the pressure and the concentration of the combustible gas in the box body 2 in real time, and when danger is about to occur in the box body 2 or occurs, the fire-fighting device 5 is started to release fire-fighting substances in the fire-fighting tank body 51 into the box body 2, so that the danger in the box body 2 is controlled, and the irrecoverable life and property loss caused by the fire of the battery pack can be effectively reduced.

In addition, the battery pack with the fire-fighting function of the present utility model controls the fire-fighting device 5 to operate to handle the danger in the case 2 by the control module only when the pressure change value and the flammable gas concentration change value are too large. Because the pressure in the tank 2 also changes suddenly when the battery pack is subjected to sudden vibration or impact during use, there is no risk of fire in the tank 2 when the concentration of the combustible gas is insufficient, and the fire control device 5 does not need to operate. Therefore, the battery pack with the fire-fighting function can also effectively prevent misjudgment, and the fire-fighting device 5 can only act when the fire risk exists in the box body 2, so that the loss caused by the misaction of the fire-fighting device 5 can be reduced.

Because the battery cell 1 can continuously generate combustible gas in normal operation, the combustible gas in the box body 2 can be timely discharged, and the danger in the box body 2 can be prevented. Therefore, the top of the box body 2 is provided with the ventilation holes 6 and the ventilation valve, when the ventilation valve is closed, the box body 2 is in a sealing state, and when the ventilation valve is opened, the combustible gas in the box body 2 can be discharged out of the box body 2 through the ventilation holes 6.

Specifically, the ventilation valve is connected with a control module in a signal way, and the control module can control the ventilation valve to be opened and closed. The control module also has a timing sub-module which can open and close the ventilation valve at regular time and periodically discharge the combustible gas in the tank 2.

As an example, when the timing submodule calculates that the battery pack with the fire-fighting function of the utility model has the operation time of twenty-eight days, the control module controls the exhaust valve to be opened so that the combustible gas in the tank body 2 is discharged out of the tank body 2, and when the timing submodule calculates that the exhaust valve has the opening time of ten minutes, the control module controls the exhaust valve to be closed so as to discharge the combustible gas in the tank body 2 out of the tank body 2 at the timing, and the concentration of the combustible gas in the tank body 2 is reduced.

In addition, when the control module controls the valve 52 of the fire-fighting device 5 to be opened, the exhaust valve is also controlled to be opened simultaneously, so that when fire-fighting substances are released into the box body 2, combustible gas in the box body 2 can be extruded out of the box body 2, and further, a better fire-fighting effect is obtained.

The working principle of the battery pack with the fire-fighting function is as follows: when the pressure sensor 3 detects that the pressure change value exceeds the pressure change threshold value, and the gas concentration detector detects that the gas concentration change value exceeds the gas concentration change threshold value, the control module issues a fire-fighting command to the fire-fighting device 5, the control valve 52 is opened, fire-fighting substances in the fire-fighting tank 51 are released into the tank body 2, and meanwhile, the control module controls the exhaust valve to be opened, so that the fire-fighting substances can extrude the gas out of the tank body 2, and further, the danger in the tank body 2 is controlled.

When the battery pack with the fire-fighting function operates normally and the timing submodule calculates that the battery pack operation time reaches the preset time, the control module controls the exhaust valve to be opened, so that the combustible gas in the box body 2 is discharged out of the box body 2, and when the timing submodule calculates that the exhaust valve opening time reaches the preset time, the control module controls the exhaust valve to be closed, so that the combustible gas in the box body 2 is discharged out of the box body 2 at fixed time, and the concentration of the combustible gas in the box body 2 is reduced.

Therefore, the battery pack with the fire-fighting function can control the danger in the box body 2 at the beginning of the danger of the battery pack or the danger, and can effectively reduce the loss of life and property caused by the safety accident of the battery pack. And through the timing discharge to the gas in the box 2, the battery pack with the fire-fighting function of the utility model has the advantage of being difficult to cause safety accidents.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The utility model provides a battery package that possesses fire control function, includes box (2), box (2) are used for holding electric core (1), its characterized in that: the fire-fighting device also comprises a control module, a pressure sensor (3), a gas detector (4) and a fire-fighting device (5);

the pressure sensor (3) is arranged in the box body (2) and is used for monitoring the pressure change value in the box body (2);

the gas detector (4) is arranged in the box body (2) and is used for monitoring the concentration change value of the combustible gas in the box body (2);

the fire-fighting device (5) is arranged in the box body (2) and contains fire-fighting substances;

the control module is in signal connection with the pressure sensor (3), the gas detector (4) and the fire fighting device (5); the pressure sensor (3) is used for sending a fire-fighting command to the fire-fighting device (5) when the monitored pressure change value exceeds a pressure change threshold value and the combustible gas concentration change value exceeds a combustible gas concentration change threshold value;

the fire-fighting device (5) is used for releasing the fire-fighting substances into the box body (2) when receiving the fire-fighting command.

2. The fire-fighting battery pack according to claim 1, wherein:

the fire-fighting device (5) comprises a fire-fighting tank body (51) and a valve (52);

the fire-fighting tank body (51) is detachably arranged on the inner wall of the box body (2), and the fire-fighting substances are contained in the fire-fighting tank body (51);

the valve (52) is communicated with the fire-fighting tank body (51) and is in signal connection with the control module, and is used for being opened when receiving the fire-fighting command so as to enable the fire-fighting substance to be released into the box body (2).

3. The fire-fighting battery pack according to claim 2, wherein: the valve (52) is a puncture valve.

4. The fire-fighting battery pack according to claim 1, wherein: the fire-fighting substance is perfluoro-hexanone or heptafluoropropane.

5. The fire-fighting battery pack according to claim 1, wherein: an air hole (6) is formed in the top of the box body (2);

an air ventilation valve is arranged in the air ventilation hole (6), the air ventilation valve can seal the air ventilation hole (6), and the air ventilation valve is in signal connection with the control module;

the control module controls the opening and closing of the ventilation valve, and further controls the opening and closing of the ventilation holes (6).

6. The fire protection battery pack according to claim 5, wherein the control module has a timing sub-module that opens and closes the vent valve at regular timings to periodically discharge the combustible gas in the tank (2).

7. The fire protection battery pack according to claim 5, wherein the ventilation valve is a solenoid valve.

8. The fire protection battery pack according to claim 1, wherein the pressure change threshold is between 1.1 and 1.2 atmospheres.

9. The fire protection battery pack according to claim 1, wherein the flammable gas concentration change threshold is 500ppm.

10. The fire protection battery pack of claim 1, wherein the control module is integrated within a battery management system of the vehicle.