An airborne power battery dynamic pressure and temperature test chamber

Abstract

The present invention discloses an airborne power battery dynamic pressure and temperature change test chamber, comprising: an internal test chamber, which is used to provide a space for the combustion of airborne lithium batteries, and a gas-liquid fire extinguishing port is arranged on the top of the internal test chamber; an external temperature control chamber, which is sleeved on the test chamber, and a pressure control system is arranged on the internal test chamber to control the internal pressure of the internal test chamber; a temperature control system is arranged on the external temperature control chamber. The airborne power battery dynamic pressure and temperature change test chamber of the present invention can achieve the effect of changing the environment of the internal test chamber through the arrangement of the external temperature control chamber, and can better provide experimental research on lithium batteries under different temperatures, pressures and atmospheres.

Description

Technical Field

[0001] The present invention relates to an experimental cabin, and more particularly to an airborne power battery dynamic pressure and temperature variable experimental cabin. Background Art

[0002] At present, the traditional airborne halon fire extinguishing agent is still widely used at home and abroad, but it has the disadvantages of easy re-ignition and damage to the ozone layer. The International Civil Aviation Organization (ICAO) is actively promoting countries to eliminate halon fire extinguishing agents and adopt alternative fire extinguishing agents. The existing major halon alternative fire extinguishing agents are 2-BTP, heptafluoropropane (HFC), Novec1230, fine water mist and other fire extinguishing agents.

[0003] In China, there is no experimental equipment specially designed and developed for the above-mentioned new fire extinguishing agents to extinguish lithium battery fires. Most of the experimental equipment for lithium battery fire extinguishing research simply installs the fire extinguishing agent pipeline and nozzle into the fire extinguishing cabinet to release the fire extinguishing agent. The equipment has poor sealing, cannot adjust the ambient pressure and ambient temperature, and has a single function. There is no accurate detection and control device, and the integration and compatibility between the existing experimental platforms is not high, and it is impossible to obtain experimental data in real time and accurately. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an airborne power battery dynamic pressure and temperature test chamber, which is mainly used to meet the thermal failure and fire extinguishing experimental research of lithium batteries under different temperatures, pressures and atmospheres.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an airborne power battery dynamic pressure and temperature test chamber, comprising:

[0006] The internal test cabin is used to provide a space for the combustion of the onboard lithium battery. A gas-liquid fire extinguishing port is provided on the top of the cabin to connect to the external fire extinguishing agent generating equipment to spray the fire extinguishing agent into the internal test cabin.

[0007] An external temperature control cabin is mounted on the experimental cabin to wrap the experimental cabin and control the external temperature of the experimental cabin;

[0008] The pressure control system is arranged on the internal experimental chamber to control the internal pressure of the internal experimental chamber; the temperature control system is arranged on the external temperature control chamber to control the temperature inside the external temperature control chamber, thereby adjusting the temperature environment of the internal experimental chamber.

[0009] As a further improvement of the present invention, the internal experimental cabin includes a large cabin and a small cabin, both of which are perfect spheres. The door of the large cabin is located at the front end of the cabin body and swings open to the left, and the door of the small cabin is located at the upper part of the cabin body and swings open to the right. The door of the large cabin and the door of the small cabin are connected to the cabin body through hinges, and are tightened with a full circle of bolts after the doors are closed. A circular observation window is installed at the front end of the cabin body of the large cabin and the small cabin.

[0010] As a further improvement of the present invention, the pressure control system includes an air extraction system and an air intake system. The air extraction system and the air intake system share a set of ventilation pipelines connected to the internal experimental cabin, and are switched through two solenoid valves.

[0011] As a further improvement of the present invention, the air intake system includes an oxygen cylinder, a nitrogen cylinder, an argon cylinder and a compressed air cylinder, which are connected to a ventilation pipeline after being merged into a main pipe, wherein the oxygen cylinder, nitrogen cylinder, argon cylinder and compressed air cylinder are respectively connected to the main pipe through mass flow controllers to achieve the ratio of gas components input into the internal experimental cabin through the mass flow controllers.

[0012] As a further improvement of the present invention, the temperature control system includes a heater and a refrigeration unit, and the inner wall interlayer of the external temperature control cabin has a heat preservation layer.

[0013] As a further improvement of the present invention, the doors of the large cabin and the small cabin are provided with clamping frames corresponding to the positions of the bolts, and the clamping frames include a fixed frame and a movable frame, and the fixed frame and the movable frame are both L-shaped, one end of the fixed frame is fixed to the cabin door, and one end of the movable frame is fixed to the cabin body, and a rack is fixed to the other end of the movable frame relative to the cabin body, and a gear is rotatably provided at a middle position of the fixed frame, and the gear is meshed with the fixed rack, and a ratchet is coaxially fixed on one end of the gear, and a rotatable ratchet rod is provided at a position of the fixed frame close to the ratchet, and the movable end of the ratchet rod can be embedded in the ratchet teeth of the ratchet to position the ratchet, and a toggle rod is fixed to the middle of the ratchet rod, and the toggle rod passes through the fixed frame.

[0014] As a further improvement of the present invention, the specific steps of using the experimental cabin are as follows:

[0015] Step 1: Start the power of the experimental cabin and log in to the operating system interface of the experimental cabin;

[0016] Step 2: Arrange the lithium battery experimental device: Arrange the lithium battery module, electric heating device and thermocouple in the internal experimental cabin according to the experimental plan, and tighten the internal experimental cabin to make it sealed;

[0017] Step 3, changing the temperature inside the external temperature control cabin;

[0018] Step 4, depressurizing the internal experimental chamber through the pressure control system;

[0019] Step 5, pressurizing the internal experimental chamber through the pressure control system;

[0020] Step 6: After the pressure inside the internal test chamber is stable, turn on the power supply and start heating the lithium battery in the internal test chamber;

[0021] Step seven: After the experiment is completed, depressurize the internal experimental chamber.

[0022] Beneficial effects of the present invention:

[0023] (1) It can realize the regulation of the internal gas environment and the proportion of different gas components in the environment, and complete the combustion and explosion experiments of lithium batteries and other types of samples under different experimental conditions;

[0024] (2) It can realize lithium battery failure tests under different gas environments such as oxygen-free, low oxygen, argon, halon fire extinguishing gas, and heptafluoropropane fire extinguishing gas, and can perform real-time monitoring and analysis of the released gas components;

[0025] (3) Temperature control within the range of +40°C to -60°C can be achieved, the temperature adjustment time should be controlled within 120 minutes, and the temperature accuracy (stability) should be better than ±3°C.

[0026] (4) Real-time collection of various parameter data such as temperature, pressure, smoke density, and smoke composition can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The schematic diagram of the dynamic pressure and temperature variation test chamber of the airborne power battery of the present invention;

[0028] Figure 2 This is the schematic diagram of the internal experimental chamber and the external temperature control chamber;

[0029] Figure 3 It is a structural schematic diagram of the dynamic pressure and temperature variation test cabin of the airborne power battery of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the compression frame. DETAILED DESCRIPTION

[0031] The present invention will be further described below in detail with reference to the embodiments shown in the accompanying drawings.

[0032] Reference Figures 1 to 4 As shown, an airborne power battery dynamic pressure and temperature test chamber of this embodiment includes:

[0033] The internal test chamber 1 is used to provide a space for the combustion of the onboard lithium battery, and a gas-liquid fire extinguishing port 11 is provided on the upper portion thereof to connect an external fire extinguishing agent generating device to spray the fire extinguishing agent into the internal test chamber 1;

[0034] The external temperature control chamber 2 is mounted on the experimental chamber 1 to wrap the experimental chamber 1 so as to control the external temperature of the experimental chamber 1;

[0035] A pressure control system 3, arranged on the internal experiment cabin 1, to control the internal pressure of the internal experiment cabin 1;

[0036] The temperature control system 4 is arranged on the external temperature control chamber 2 to control the temperature inside the external temperature control chamber 2, and then adjust the temperature environment of the internal experimental chamber 1. Through the combined action of the internal experimental chamber 1 and the external temperature control chamber 2, it is possible to achieve the effect of changing the external environment during the lithium battery experiment, which can meet the thermal failure and fire extinguishing experimental research of lithium batteries under different temperatures, pressures and atmospheres.

[0037] As a specific embodiment of the improvement, the internal experimental cabin 1 includes a large cabin 12 and a small cabin 13, both of which are perfect spheres. The door of the large cabin 12 is located at the front end of the cabin body and is opened to the left. The door of the small cabin 13 is located at the upper part of the cabin body and is opened to the right. The doors of the large cabin 12 and the small cabin 13 are connected to the cabin body through hinges, and are tightened with a full circle of bolts after the doors are closed. The front ends of the cabin bodies of the large cabin 12 and the small cabin 13 are each equipped with a Round observation window, the internal diameter of the large cabin 12 is 600mm, and the effective volume is about 100L; the internal diameter of the small cabin 13 is 350mm, and the effective volume is about 20L. The cabin body is welded with 304 stainless steel metal material, and the overall pressure resistance is designed according to the positive pressure of 2MPa. The large cabin body adopts a spherical head with a wall thickness of 6mm, and the small cabin body adopts a spherical head with a wall thickness of 4mm. The stainless steel flange is welded and sealed with the cabin door. The spherical head has the characteristics of high pressure resistance and uniform force. The cabin door of the large cabin 12 is located at the front end of the cabin body, swings left, and the cabin door hole has a diameter of about 400mm. It is convenient for experimental items and testing instruments to be arranged. The cabin door flange is sealed with a large-size O-ring. The structural process is mature and easy to install and use. The cabin door of the small cabin 13 is located at the upper part of the cabin body, swings right, and the cabin door hole has a diameter of about 350mm. The cabin door is connected to the cabin body by a hinge. After the cabin door is closed, a full circle of bolts are used to tighten it to withstand the positive pressure of 2MPa without leakage. A circular observation window is installed at the front of the cabin, which is made of transparent explosion-proof high-strength glass. It can be used to observe and monitor the entire internal experimental process in real time. The size of the observation window is designed according to DN50 for large cabins and DN20 for small cabins. Various experimental access ports and detection reserved ports are designed on the cabin.

[0038] As a specific implementation of the improvement, the pressure control system 3 includes an exhaust system 31 and an intake system 32, the exhaust system 31 and the intake system 32 share a set of ventilation pipelines connected to the internal experimental cabin 1, and are switched by two solenoid valves, the intake system 32 includes an oxygen cylinder, a nitrogen cylinder, an argon cylinder and a compressed air cylinder, the oxygen cylinder, the nitrogen cylinder, the argon cylinder and the compressed air cylinder are connected to the ventilation pipeline after being merged into a main pipe, wherein the oxygen cylinder, the nitrogen cylinder, the argon cylinder and the compressed air cylinder are respectively connected to the main pipe through a mass flow controller, so as to realize the allocation of the gas component ratio input into the internal experimental cabin 1 through the mass flow controller, and there are four types of intake control Gas sources, including oxygen, nitrogen, argon, and air, need to be individually controlled and adjustable for four air intakes, which are introduced into the cabin in a certain proportion. The coordination of the air intake pipe and the air outlet pipe can realize the change of the gas composition of the internal environment of the cabin and the precise allocation and control of the proportion of various gas components to meet the gas environment required by different experiments, and at the same time adjust and maintain the air pressure in the cabin. The air intake method, control method, and control accuracy of the gas are the key points of the design. The air intake system considers the use of gas cylinder pressure. Oxygen, nitrogen, and argon are forced to enter by positive pressure of gas cylinders according to the required proportions, and the control flow is adjusted by mass flow controllers respectively. Compressed air is forced to enter the air, and the control flow is adjusted by mass flow controllers. After the four air intakes are individually controlled, they are merged into a main pipe and introduced from the bottom of the cabin. The intake flow rate is selected to match the cabin volume. Since the volume of the large cabin 12 is 100L and the volume of the small cabin 13 is 20L, it is more reasonable to choose a 20LPM flowmeter after weighing the inflation time and control accuracy. It takes about 10 minutes for the large cabin to be inflated from vacuum to 200kPa. Considering that the gas environment in the cabin may be any of the above-mentioned single gases or gas mixtures, the intake flow controllers for oxygen, nitrogen, argon, and air should all be selected at 20LPM, and the intake pressure should be ≥3 atmospheres. The exhaust system 31 is specifically configured to have an exhaust pipe leading out from the rear of the cabin, sharing the cabin interface with the intake pipe, and switching the pipe through an electric three-way valve. The exhaust pipe selects an electromagnetic valve as the control on and off. The electromagnetic valve is quickly turned on and off, which is beneficial for adjusting the pressure in the cabin. When pumping negative pressure, the exhaust pump and the cabin can be quickly disconnected when the target pressure is reached, so that the pressure is stabilized near the target pressure. At the same time, since the vacuum pump is an oil pump, a vacuum vent valve needs to be installed at the pump suction port to isolate the vacuum pump from the cabin at the moment of power failure to prevent the pump from returning oil into the cabin. Safety pressure relief valves, pressure gauges, and gas collection ports are arranged on the exhaust pipeline. The exhaust system uses a rotary vane vacuum pump, which is one of the most basic vacuum acquisition equipment in vacuum technology. It is small in size, light in weight, and low in noise. It is an oil-sealed mechanical vacuum pump with an operating pressure range of normal pressure to 100Pa. Considering that a variety of gas mixtures and smoke particles and other substances may be generated during the experiment, a smoke filter device is added to the front end of the pump to reduce damage to the pump.When the pump is statically evacuated and the valve is fully open, the pressure drop rate is faster in the initial stage and gradually slows down in the later stage. It is calculated according to the pumping speed formula of the pump.

[0039] Pumping speed calculation:

[0040]

[0041] S---Calculated pumping speed of the pump m 3 / min

[0042] V---Effective volume of chamber m 3

[0043] T---Evacuation time from initial pressure to final pressure min

[0044] P1---Initial chamber pressure Pa

[0045] P2--- Final chamber pressure Pa

[0046] The volume of the large chamber is calculated as 0.12m3, and the pressure in the chamber is designed to be pumped down to 100pa within 5 minutes. The calculated pumping speed is 9.95m3 / h.

[0047] As a specific implementation of the improvement, the temperature control system 4 includes a heater 41 and a refrigeration unit 42. The inner wall interlayer of the external temperature control cabin 2 has an insulation layer. The refrigeration unit 42 uses an air-cooled low-temperature cascade refrigeration unit according to the required refrigeration temperature and temperature change rate requirements. The compressor uses a Bitzer compressor with an evaporation temperature of -70°C, a condensation temperature of 50°C, and a refrigeration capacity of >3kw. A matching evaporator and fan are used and installed in the temperature control cabin. The circulating cold air circulates inside the temperature control cabin and transfers heat to the experimental cabin through the experimental cabin wall to complete the refrigeration. The refrigeration capacity is calculated as follows:

[0048] External cabin volume 2.6m 3 , cooling from room temperature 20℃ to -60℃, time 2h.

[0049] (1) Heat capacity of gas in cabin + heat capacity of air intake

[0050] Heat capacity of gas in cabin

[0051] Q1=Cm△t=1005×2.6×1.25×80=0.26x106 J

[0052] Cabin air intake, calculated at 20L / min

[0053] q1=1005×20 / 60000×1.25×80=33.5w

[0054] (2) The heat capacity change of the objects in the chamber is based on the internal test chamber of 200 kg

[0055] The material is estimated based on stainless steel

[0056] Q2=Cm△t=500×200×80=8x106 J

[0057] (3) Wall heat transfer

[0058] It is estimated that the temperature in the cabin reaches -60℃, at which time the wall heat transfer reaches its maximum.

[0059] The surface area of ​​the box is about 15m2;

[0060] K=1 / (1 / Aw+δ / λ+1 / An)W / (m 2 ℃)

[0061] K = 1 / (1 / 15+0.1 / 0.08+1 / 15)

[0062] K=1 / 1.38

[0063] K=0.72W / (m 2 ℃)

[0064] Heat transfer of enclosure: q2 = K × S × △t = 0.72 × 15 × 80 = 864W, where K is the heat transfer coefficient of the box insulation layer W / (m 2 ℃)

[0065] S---Box surface area, unit: m2

[0066] An, Aw---internal and external surface heat exchange coefficient, 15W / (m 2 ℃)

[0067] Δ---tube wall thickness, m

[0068] Λ---Thermal conductivity of tube wall, W / (m·℃)

[0069] △t---The temperature difference between the inner and outer surfaces of the insulation layer is based on room temperature + 20℃, and the lowest temperature in the cabin is -60℃, unit: ℃

[0070] In summary, the total cooling capacity is: q = (Q1 + Q2) / 2 * 3600 + q1 + q2 = 2.1kw;

[0071] The cabin needs to be heated to 40°C, which is achieved by using a resistance wire heating device. At the same time, the refrigeration unit can only adjust the cabin temperature by starting and stopping, and it is difficult to maintain a stable temperature value. In order to meet the temperature control accuracy, a heating system is also needed to match the refrigeration system so that the temperature can be stabilized at the set value. The heating power is calculated and determined based on the corresponding refrigeration power of the actual selected refrigeration unit.

[0072] As an improved specific implementation method, the doors of the large cabin 12 and the small cabin 13 are provided with a clamping frame 5 corresponding to the position of the bolts, and the clamping frame 5 includes a fixed frame 51 and a movable frame 52. The fixed frame 51 and the movable frame 52 are both L-shaped, one end of the fixed frame 51 is fixed to the door, one end of the movable frame 52 is fixed to the cabin body, and the other end of the movable frame 52 relative to the cabin body is fixed with a rack 521. A gear 511 is rotatably provided at the middle of the fixed frame 51, and the gear 511 is meshed with the fixed rack 521. A ratchet 512 is coaxially fixed to one end of the gear 511, and the fixed frame 51 is close to the ratchet 512. A rotatable ratchet rod 513 is provided at the position, and the movable end of the ratchet rod 513 can be embedded in the ratchet teeth of the ratchet wheel 512 to position the ratchet wheel 512. A toggle rod 514 is fixed to the middle part of the ratchet rod 513, and the toggle rod 514 passes through the fixed frame 51. Through the setting of the clamping frame 5, it can be achieved that in the process of bolting the hatch door and the cabin body, the hatch door and the cabin body are first clamped by the clamping frame 5, and then the hatch door and the cabin body are tightened by rotating the bolt. Compared with the method of directly rotating the bolt to tighten in the prior art, this can greatly reduce the problem of strong friction and easy collapse between the bolt thread and the hatch connecting plate during the rotation of the bolt.

[0073] The specific steps of using the experimental cabin in this embodiment are as follows:

[0074] Step 1: Start the power of the experimental cabin and log in to the operating system interface of the experimental cabin;

[0075] Step 2: Arrange the lithium battery experimental device: Arrange the lithium battery module, the electric heating device and the thermocouple in the internal experimental chamber 1 according to the experimental plan, and tighten the internal experimental chamber 1 to make it sealed;

[0076] Step 3, changing the temperature inside the external temperature control cabin 2;

[0077] Step 4, reducing the pressure of the internal experimental chamber 1 through the pressure control system 3;

[0078] Step 5, the internal experimental chamber 1 is pressurized by the pressure control system 3;

[0079] Step 6: After the internal pressure of the internal test chamber 1 is stabilized, the power supply is turned on to start a heating experiment on the lithium battery in the internal test chamber 1;

[0080] Step seven, after the experiment is completed, the internal experimental chamber 1 is depressurized. Through the above steps, the combustion experiment can be effectively carried out using the experimental chamber of this embodiment. In order to retain the gas medium in the spherical chamber, speed up the temperature change speed and shorten the temperature change time, the temperature is changed first and then the pressure is changed.

[0081] In summary, the experimental cabin of this embodiment has the following beneficial effects:

[0082] (1) Strong pressure bearing capacity. The container can withstand positive and negative pressures within a certain range, and can be used to test a variety of complex behavior experiments such as the explosion of multiple lithium batteries and the determination of the explosion limit of released gas. The maximum positive pressure is 2MPa, and the maximum negative pressure is approximately an absolute vacuum environment.

[0083] (2) The pressure range is large, and the absolute pressure transformation process of 0 to 200 kPa can be realized. The pressure accuracy (stability) is better than 0.1 kPa.

[0084] (3) Variable ambient temperature, which can simulate temperatures ranging from +40°C to -60°C. The temperature adjustment time should be controlled within 120 minutes, and the temperature accuracy (stability) should be better than ±3°C.

[0085] (4) Variable atmosphere: The gas composition inside the container can be changed and the proportion of various gas components can be precisely adjusted and controlled through the coordination of the inlet and outlet pipes to meet the gas environment required by different experiments. The pipeline air inlet is designed to be 4, which realizes the combination of O2, N2, Ar and air alone or in combination.

[0086] (5) Gas composition can be measured. The air replacement environment can control the four gas compositions of O2, N2, Ar, and air with a control accuracy better than 1%. Lithium batteries produce CO, CO2, CmHn, H2 and other gas compositions with a measurement accuracy better than 1%. (Reference: Lithium battery exhaust gas composition 30.1% CO2; 27.6% H2; 22.9% CO; 6.37% CH4; 4.48% C3H6; 2.21% C2H4; 1.57% C4H10; 1.17% C2H6; 0.56% C4H8; 0.268% C3H8)

[0087] (6) It has fire extinguishing function, with one sprinkler fire extinguishing port reserved and one gas fire extinguishing pipe reserved; and both can achieve flow control.

[0088] (7) Multiple routes are reserved, and temperature sensor interfaces (10), pressure sensor interfaces (10) and other sensor and equipment positions are reserved to complete real-time measurement of different experimental parameters; and a heating plate cable access port is set; the shell structure reserves 4 sensor and power line access ports.

[0089] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An airborne power battery dynamic pressure and temperature test chamber, characterized in that: include: The internal test chamber (1) is used to provide a space for the onboard lithium battery to burn, and a gas-liquid fire extinguishing port (11) is provided on the upper portion thereof for connecting to an external fire extinguishing agent generating device to spray the fire extinguishing agent into the internal test chamber (1); An external temperature control chamber (2) is mounted on the experimental chamber (1) to wrap the experimental chamber (1) and control the external temperature of the experimental chamber (1); A pressure control system (3) is arranged on the internal experimental chamber (1) to control the internal pressure of the internal experimental chamber (1); A temperature control system (4) is arranged on the external temperature control chamber (2) to control the temperature inside the external temperature control chamber (2) and thereby adjust the temperature environment of the internal experimental chamber (1); The internal experimental cabin (1) comprises a large cabin (12) and a small cabin (13), wherein the large cabin (12) and the small cabin (13) are both perfect spheres, the cabin door of the large cabin (12) is located at the front end of the cabin body and is swung to the left, and the cabin door of the small cabin (13) is located at the upper part of the cabin body and is swung to the right, wherein the cabin door of the large cabin (12) and the cabin door of the small cabin (13) are both connected to the cabin body via hinges, and are tightened with a full circle of bolts after the cabin doors are closed, and the front ends of the cabin bodies of the large cabin (12) and the small cabin (13) are both equipped with a circular observation window; The pressure control system (3) comprises an air extraction system (31) and an air intake system (32), wherein the air extraction system (31) and the air intake system (32) share a set of ventilation pipelines connected to the internal experimental chamber (1), and are switched by two solenoid valves; The doors of the large cabin (12) and the small cabin (13) are provided with clamping frames (5) corresponding to each other at positions relative to the bolts. The clamping frames (5) include a fixed frame (51) and a movable frame (52). The fixed frame (51) and the movable frame (52) are both L-shaped. One end of the fixed frame (51) is fixed to the cabin door, and one end of the movable frame (52) is fixed to the cabin body. The other end of the movable frame (52) relative to the cabin body is fixed with a rack (521). A gear is rotatably provided at the middle of the fixed frame (51). The gear (511) is meshed with a fixed rack (521); a ratchet (512) is coaxially fixed to one end of the gear (511); a rotatable ratchet rod (513) is provided at a position of the fixed frame (51) close to the ratchet (512); a movable end of the ratchet rod (513) can be embedded in the ratchet teeth of the ratchet (512) to position the ratchet (512); a toggle rod (514) is fixed to the middle of the ratchet rod (513); and the toggle rod (514) extends out of the fixed frame (51).

2. The airborne power battery dynamic pressure and temperature test chamber according to claim 1 is characterized in that: The air intake system (32) includes an oxygen cylinder, a nitrogen cylinder, an argon cylinder and a compressed air cylinder, wherein the oxygen cylinder, the nitrogen cylinder, the argon cylinder and the compressed air cylinder are connected to a ventilation pipeline after being connected to a main pipe, wherein the oxygen cylinder, the nitrogen cylinder, the argon cylinder and the compressed air cylinder are connected to the main pipe respectively through a mass flow controller, so as to adjust the ratio of gas components input into the internal experimental chamber (1) through the mass flow controller.

3. The airborne power battery dynamic pressure and temperature test chamber according to claim 1 or 2, characterized in that: The temperature control system (4) comprises a heater (41) and a refrigeration unit (42), and the inner wall of the external temperature control chamber (2) is provided with a heat-insulating layer.

4. The airborne power battery dynamic pressure and temperature test chamber according to claim 1 or 2, characterized in that: The specific steps for using the experimental chamber are as follows: Step 1: Start the power of the experimental cabin and log in to the operating system interface of the experimental cabin; Step 2: Arrange the lithium battery experimental device: Arrange the lithium battery module, the electric heating device and the thermocouple in the internal experimental chamber (1) according to the experimental plan, and tighten the internal experimental chamber (1) to make it sealed; Step 3, changing the temperature inside the external temperature control chamber (2); Step 4, reducing the pressure of the internal experimental chamber (1) through the pressure control system (3); Step 5, the pressure of the internal experimental chamber (1) is increased through the pressure control system (3); Step 6: After the internal pressure of the internal test chamber (1) is stabilized, the power supply is turned on to start a heating experiment on the lithium battery in the internal test chamber (1); Step 7: After the experiment is completed, the internal experimental chamber (1) is depressurized.

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