CN118438887A - High-temperature airflow pumping device, power battery system and vehicle - Google Patents
High-temperature airflow pumping device, power battery system and vehicle Download PDFInfo
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- CN118438887A CN118438887A CN202410534005.6A CN202410534005A CN118438887A CN 118438887 A CN118438887 A CN 118438887A CN 202410534005 A CN202410534005 A CN 202410534005A CN 118438887 A CN118438887 A CN 118438887A
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- 238000005086 pumping Methods 0.000 title abstract description 18
- 239000012943 hotmelt Substances 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 description 21
- 238000004880 explosion Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The invention provides a high-temperature airflow pumping device, a power battery system and a vehicle, and belongs to the technical field of safety protection after thermal runaway of the power battery system of the vehicle. The vehicle is provided with the high-temperature air flow pumping device on the power battery system, and the pumping device is matched with the air duct to pump out the high-temperature air flow, so that the problem that the combustible outside the battery pack is easy to directly ignite after the high-temperature air inside the power battery system of the vehicle is strung out from the battery pack sealing notch damaged by high temperature in the prior art is solved. The high-temperature airflow pumping device comprises an air pump, wherein an explosion-proof balance valve is arranged on the air pump, an air pressure sensing cavity is arranged in the explosion-proof balance valve, and the air pressure sensing cavity is communicated with the air pump; the air pressure sensing cavity is provided with a valve port, a valve plug is arranged at the valve port, and a hot melting plug tail is fixedly arranged outside the air pressure sensing cavity; the valve plug and the hot-melt plug tail are connected through a spring.
Description
Technical Field
The invention relates to the technical field of safety protection after thermal runaway of a vehicle power battery system, in particular to a high-temperature airflow pumping device, a power battery system and a vehicle.
Background
With the strong support of policies and the gradual maturity of technologies, the number of electric vehicles is increasing. The power battery system is a core component of the electric automobile and provides a power source for the electric automobile.
The power battery system of the automobile can cause abnormal temperature rise due to internal or external factors in the process of charging and discharging, and when the phenomenon is serious, spontaneous combustion and even explosion of the battery and the whole automobile can be caused. In order to control and prevent thermal runaway of the power battery system, researchers and engineers adopt various methods, such as the specification of Chinese patent application publication No. CN214762982U, the technical scheme is recorded, when the temperature rise phenomenon occurs in the power battery system, high-temperature air flow or flame in the power battery pack passes through an exhaust port on the battery pack, then enters an umbrella-shaped backflow cover through a fire extinguishing device to be dispersed to the bottom of a vehicle, or the high-temperature air flow is led out to the front/rear of the vehicle through an L-shaped flow guide pipe, so that the direct combustion of the high-temperature air flow at the bottom of the vehicle is avoided, and the fire condition of the whole vehicle is initiated.
However, the high-temperature air flow led out from the scheme enters the atmosphere and can be ignited again; on the other hand, the scheme can not dredge the internal atmospheric pressure of the battery pack, so that the high-temperature gas in the battery pack can pass through the sealed notch damaged by high temperature and be strung out of the pack to directly ignite external combustible materials; while vehicles are right in front of and behind, most often there are vegetation and other vehicles, and thus there is a high likelihood of greater loss.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a high-temperature air-flow extraction device, a power battery system and a vehicle, which are used for solving the problem that in the prior art, after high-temperature air in the power battery system of the vehicle is strung out from a sealing notch of a battery pack damaged by high temperature, combustibles outside the battery pack are easy to directly ignite.
In order to achieve the above and other related objects, the present invention provides a high temperature air flow pumping device, comprising an air pump, wherein an explosion-proof balance valve is installed on the air pump, an air pressure sensing cavity is arranged in the explosion-proof balance valve, and the air pressure sensing cavity is communicated with the air pump; the air pressure sensing cavity is provided with a valve port, a valve plug is arranged at the valve port, and a hot melting plug tail is fixedly arranged outside the air pressure sensing cavity; the valve plug and the hot-melt plug tail are connected through a spring.
Optionally, the system also comprises an electronic controller and an air pressure sensor; the air pressure sensor detects an air pressure value Pq in the air pressure sensing cavity and transmits the air pressure value Pq to the electronic controller; the air pressure sensor and the electronic Pq are larger than or equal to rated value Pk, and the electronic controller increases the power of the air pump; pq is less than a nominal value Pk, the electronic controller reduces the power of the suction pump.
Alternatively, the nominal value Pk is less than atmospheric pressure.
Optionally, the material of the hot-melt plug tail is hot-melt plastic.
Optionally, the air pump is driven by an air pump motor.
Optionally, a heat insulation pad is installed between the air pump motor and the air pump.
A power battery system comprising a battery pack and a high temperature air flow extraction device as described above, the battery pack being provided with an opening, the opening communicating with the valve port.
Optionally, the hot-melt plug tail is fixedly installed on the outer ring of the opening.
The vehicle comprises a vehicle body, an air duct and the power battery system, wherein openings at two ends of the air duct are respectively an air guide inlet and an air guide outlet, the air guide inlet is communicated with the air suction pump, the air guide outlet is arranged at the left front part of the vehicle body, and the air guide outlet faces the ground.
Optionally, the air duct is made of a refractory material.
The high-temperature airflow pumping device, the power battery system and the vehicle have at least the following beneficial effects:
1. According to the high-temperature air flow pumping device, through the design that a valve plug and a hot-melting plug tail are connected through a spring on an explosion-proof balance valve, when accidents such as combustion occur, the pressure of air flow in a closed space is increased along with the increase of the temperature of the air flow, so that the valve plug is jacked up, and high-temperature air flow enters an air pressure sensing cavity; if the temperature of the air flow is further increased, the hot-melting plug tail is melted, and after the fixed force point of the spring is lost, the spring can not rebound to drive the valve plug to seal the valve port, so that high-temperature air flow generated after combustion can enter the air pressure sensing cavity from the valve port in an unimpeded manner; the air pump pumps out the high-temperature air flow in the air pressure sensing cavity, so that the phenomenon that the air flow is increased along with the increase of the combustion temperature, and other objects are ignited by uncontrolled external strings to cause larger loss is avoided.
2. The power battery system is provided with the opening through the battery pack, the opening is communicated with the valve port of the high-temperature airflow pumping device, after accidents such as combustion and the like occur in the power battery system, the high-temperature airflow generated along with the combustion in the battery pack can be timely pumped out through the high-temperature airflow device, so that the situation that the high-temperature airflow in the battery pack is led out of the battery pack along with the increase of combustion air pressure to ignite combustible materials outside the battery pack and cause larger loss is avoided.
3. The vehicle is provided with the high-temperature air flow pumping device on the power battery system, and the pumping high-temperature air flow is guided to the left front part of the vehicle body and then discharged towards the ground by the aid of the air duct, so that the high-temperature air flow in the battery pack of the power battery system is prevented from being led out of the battery pack along with the increase of combustion air pressure, and combustible materials outside the battery pack are ignited; compared with the technical scheme that the new energy automobile guides the high-temperature air flow to the rear, the front or the bottom of the automobile body in the prior art, the invention guides the high-temperature air flow to the left front of the automobile body has the advantages that for common T-shaped garages and roadside azimuth parking spaces, the left front of the automobile is more open than other positions, and the risk that the guided high-temperature air flow ignites articles near the automobile body is reduced.
Drawings
FIG. 1 is a schematic view of a high temperature air-flow extraction device according to the present invention.
Fig. 2 shows a schematic view of the explosion-proof balance valve of the present invention.
Description of element reference numerals
The device comprises an air duct 1, an air pump 2, a pressure detection port 3, an explosion-proof balance valve 4, a valve plug 41, an air pump motor 5, a heat insulation pad 6, an air pressure sensing cavity 7, an air pressure sensor 8 and a hot melting plug tail 9.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1-2. 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 invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. 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 invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.
Referring to fig. 1 and 2, the present invention provides a high temperature airflow pumping device, which comprises an air pump 2, wherein an explosion-proof balance valve 4 is installed on the air pump 2, an air pressure sensing cavity 7 is arranged in the explosion-proof balance valve 4, and the air pressure sensing cavity 7 is communicated with the air pump 2; the air pressure sensing cavity 7 is provided with a valve port, a valve plug 41 is arranged at the valve port, and a hot melting plug tail 9 is fixedly arranged outside the air pressure sensing cavity 7; the valve plug 41 and the hot melt plug the tail 9 is connected through a spring; in general, the high-temperature air-flow pumping device is arranged at a sealing mechanism with combustion or explosion risk, a valve port is communicated with a chamber inside the mechanism, after the mechanism generates an accident of combustion or explosion, the high-temperature air-flow pumping device is connected with a hot-melting plug tail 9 through a spring on an explosion-proof balance valve 4, the temperature of air flow in the mechanism increases along with the rise of the combustion accident, the pressure of the air flow in a closed space of the mechanism increases, so that the valve plug 41 is jacked up, and the high-temperature air flow enters an air pressure sensing cavity 7; if the temperature of the air flow is further increased, the hot-melting plug tail 9 melts, and after the fixed force point of the spring is lost, the spring does not rebound to drive the valve plug 41 to close the valve port, so that the high-temperature air flow generated after combustion can enter the air pressure sensing cavity 7 from the valve port in an unimpeded way; the air pump 2 pumps out the high-temperature air flow in the air pressure sensing cavity 7, so that the situation that the air flow is increased along with the increase of the combustion temperature, and other objects are ignited by uncontrolled external strings to cause larger loss is avoided.
The high temperature in the high temperature air flow refers to the temperature value in the chamber of the sealing mechanism or the temperature higher than the temperature value when the air pressure in the chamber increases to be capable of pushing the valve plug 41 after the combustion accident occurs in the chamber sealed by the mechanism, namely, a battery pack in a power battery system of a vehicle described below, as will be described in detail below.
In another embodiment, referring to fig. 2, the system further comprises an electronic controller and an air pressure sensor 8; the air pressure sensor 8 detects the air pressure Pq in the air pressure sensing cavity 7 and transmits the air pressure Pq to the electronic controller, and the air pressure value of the air pressure sensing cavity 7 is equal to the air pressure value of the sealing cavity in the mechanism; the air pressure sensor 8 detects that the air pressure Pq is greater than or equal to a rated value Pk, and the electronic controller increases the power of the air pump 2, so that high-temperature air flow which is possibly exploded is rapidly pumped out of a sealed mechanism chamber, and serious accidents such as explosion and the like are avoided; pq is smaller than rated value Pk, the electronic controller reduces the power of the air pump 2, maintains the balance of the sealed cavity inside the mechanism and the external atmospheric pressure, avoids too small internal atmospheric pressure of the mechanism, and the external atmospheric pressure crushes the mechanism shell to cause damage to the mechanism shell, so that the high-temperature air flow of the sealed cavity inside the mechanism is led out to ignite external combustible materials, and larger loss is caused.
In another embodiment, referring to fig. 2, the air pressure sensor 8 is installed near the air pressure sensing chamber 7, and is capable of accurately measuring the pressure value in the air pressure sensing chamber 7, and this position is referred to as the pressure detecting port 3, and the specific position design is specifically designed according to the positions of other parts and components, which will not be described herein.
In another embodiment, referring to fig. 2, the rated value Pk is smaller than the atmospheric pressure, in general, the casing of the sealing mechanism with risk of combustion or explosion is stronger, the possibility that the casing of the mechanism is crushed by the atmospheric pressure is lower, the casing of the mechanism is more easily broken by the high-temperature air flow with continuously increased pressure after internal combustion, the high-temperature air flow breaking through the casing of the mechanism may ignite the combustible outside the mechanism, in order to better solve the problem, we design the rated value Pk to be smaller than the atmospheric pressure, so that once the air pressure in the air pressure sensing cavity 7 is higher than the atmospheric pressure, the electronic controller controls the air pump 2 to operate with increased power, and the high-temperature air flow in the sealing cavity and the air pressure sensing cavity 7 of the mechanism is rapidly pumped out.
In another embodiment, referring to fig. 2, the material of the hot-melt plug tail 9 is a hot-melt plastic, and the hot-melt plastic is a polymer material, including polyethylene, polypropylene, polyamide, and the like.
In other embodiments, as shown in fig. 2, the air pump 2 is driven by an air pump motor 5, a heat insulation pad 6 is installed between the air pump motor 5 and the air pump 2, generally, the high-temperature air flow extracting device of the invention is installed on a power battery system, and the air pump 2 is driven by the air pump motor 5 to be better connected with the external whole system than other modes; the design of the heat insulation pad 6 can reduce the adverse effect of high-temperature air flow in the air pump 2 on the air pump motor 5.
The utility model provides a power battery system, includes battery package and high temperature air current take out the device as aforementioned, and this battery package is provided with the opening, and this opening and this valve port intercommunication, after power battery system takes place accidents such as burning, the high temperature air current that produces along with the burning in the battery package can in time be taken out away through high temperature air current device to avoid the high temperature air current in the battery package to increase along with burning atmospheric pressure, the cluster goes out the battery package, and ignites the combustible material outside the battery package, causes bigger loss.
As shown in fig. 2, because the power battery system adopts the high-temperature air flow pumping device and the rated air pressure Pk in the air pressure sensing cavity is smaller than the atmospheric pressure, after the accidents such as combustion, the air pressure in the air pressure sensing cavity 7 is higher than the atmospheric pressure, the electronic controller controls the air pump 2 to increase the power to work, and the high-temperature air flow in the sealing cavity and the air pressure sensing cavity 7 of the mechanism is pumped out quickly, namely the high-temperature air flow in the battery pack is pumped out, so that the negative pressure state of the battery pack compared with the external atmospheric pressure is ensured, and the flame in the battery pack is prevented from being strung out from the sealing gap and the split of the battery pack.
In another embodiment, referring to fig. 2, the hot-melt plug tail 9 is fixedly installed on the outer ring of the opening, so that after a combustion accident occurs in the battery pack, the hot-melt plug tail can be melted by heat brought by high-temperature air flow at the first time, so that the high-temperature air flow in the battery pack is extracted from the battery pack without obstruction by the high-temperature air flow extracting device, the battery pack is prevented from being broken by the high-temperature air flow, and combustible matters outside the battery pack are ignited, so that further loss is caused.
Referring to fig. 1, a vehicle includes a vehicle body, an air duct 1 and a power battery system as described above, openings at two ends of the air duct 1 are an air duct inlet and an air duct outlet, the air duct inlet is communicated with the air pump 2, the air duct outlet is arranged at the left front of the vehicle body, the air duct outlet faces the ground, the vehicle is provided with a high-temperature air flow pumping device through the power battery system, and the vehicle is matched with the design that the air duct 1 guides the pumped high-temperature air flow to the left front of the vehicle body and then is discharged towards the ground, so that the high-temperature air flow in a battery pack of the power battery system is prevented from being led out of the battery pack along with the increase of combustion air pressure, and combustible materials outside the battery pack are ignited; compared with the technical scheme that the new energy automobile guides the high-temperature air flow to the rear, the front or the bottom of the automobile body in the prior art, the invention guides the high-temperature air flow to the left front of the automobile body has the advantages that for common T-shaped garages and roadside azimuth parking spaces, the left front of the automobile is more open than other positions, and the risk that the guided high-temperature air flow ignites articles near the automobile body is reduced.
In another embodiment, as shown in fig. 1, the gas guide pipe 1 is made of a refractory material, and can ensure the reliability of operation when high temperature gas passes through, and stably guide the high temperature gas drawn from the battery pack by the high temperature gas drawing device to the left front of the vehicle body.
In summary, according to the invention, the high-temperature air flow extracting device is arranged on the power battery system, and the extracted high-temperature air flow is guided to the left front of the vehicle body by the air duct 1 and then is discharged towards the ground, so that the high-temperature air flow in the battery pack of the power battery system is prevented from being connected out of the battery pack along with the increase of combustion air pressure, and combustible materials outside the battery pack are ignited; compared with the technical scheme that the new energy automobile guides the high-temperature air flow to the rear, the front or the bottom of the automobile body in the prior art, the invention guides the high-temperature air flow to the left front of the automobile body has the advantages that for common T-shaped garages and roadside azimuth parking spaces, the left front of the automobile is more open than other positions, and the risk that the guided high-temperature air flow ignites articles near the automobile body is reduced. Therefore, the invention effectively overcomes the defects in the prior art and has higher industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. 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 invention. Accordingly, it is intended that all equivalent modifications and variations of the invention 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 (10)
1. The utility model provides a high temperature air current take out and leave device, includes aspiration pump, its characterized in that: an explosion-proof balance valve is arranged on the air pump, an air pressure sensing cavity is arranged in the explosion-proof balance valve, and the air pressure sensing cavity is communicated with the air pump;
the air pressure sensing cavity is provided with a valve port, a valve plug is arranged at the valve port, and a hot melting plug tail is fixedly arranged outside the air pressure sensing cavity; the valve plug and the hot-melt plug tail are connected through a spring.
2. The high temperature air stream extraction apparatus of claim 1, wherein: the system also comprises an electronic controller and an air pressure sensor; the air pressure sensor detects an air pressure value P q in the air pressure sensing cavity and transmits the air pressure value P q to the electronic controller;
The air pressure sensor and the electronic P q are larger than or equal to a rated value P k, and the electronic controller increases the power of the air pump; p q is less than the nominal value P k, and the electronic controller reduces the power of the pump.
3. A high temperature air stream extraction apparatus as defined in claim 2 wherein: the nominal value P k is less than atmospheric pressure.
4. The high temperature air stream extraction apparatus of claim 1, wherein: the material of the hot-melting plug tail is hot-melting plastic.
5. The high temperature air stream extraction apparatus of claim 1, wherein: the air pump is driven by an air pump motor.
6. The high temperature air stream extraction apparatus of claim 5, wherein: and a heat insulation pad is arranged between the air pump motor and the air pump.
7. A power cell system, characterized by: comprising a battery pack and a high temperature air-flow extraction device according to any one of claims 2-6, said battery pack being provided with an opening, said opening being in communication with said valve port.
8. A power cell system according to claim 7, wherein: and the hot-melting plug tail is fixedly arranged on the outer ring of the opening.
9. A vehicle, characterized in that: the power battery system comprises a vehicle body, an air duct and the power battery system according to any one of claims 7-8, wherein openings at two ends of the air duct are an air guide inlet and an air guide outlet respectively, the air guide inlet is communicated with the air suction pump, the air guide outlet is arranged at the left front part of the vehicle body, and the air guide outlet faces the ground.
10. A vehicle according to claim 9, characterized in that: the airway tube is made of a refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410534005.6A CN118438887A (en) | 2024-04-30 | 2024-04-30 | High-temperature airflow pumping device, power battery system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410534005.6A CN118438887A (en) | 2024-04-30 | 2024-04-30 | High-temperature airflow pumping device, power battery system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118438887A true CN118438887A (en) | 2024-08-06 |
Family
ID=92313404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410534005.6A Pending CN118438887A (en) | 2024-04-30 | 2024-04-30 | High-temperature airflow pumping device, power battery system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118438887A (en) |
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2024
- 2024-04-30 CN CN202410534005.6A patent/CN118438887A/en active Pending
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