Thermal runaway and containment test device for eVTOL power lithium battery

Abstract

The utility model belongs to the technical field of battery safety detection, and particularly relates to an eVTOL power lithium battery thermal runaway and containment test device which comprises a protection device, an initiation device, a video acquisition device, an infrared thermal imaging device, a gas data monitoring device, an electric heating signal acquisition device and a real-time monitoring platform. A battery to be detected, an initiation device, a video acquisition device, an infrared thermal imaging device, a gas data monitoring device and an electric heating signal acquisition device are arranged in the protection device; the problem that thermal runaway and containment test verification needs to be carried out on the eVTOL power lithium battery to meet airworthiness verification is solved, and the requirements for preprocessing, thermal runaway triggering, data acquisition, real-time monitoring and containment analysis of the eVTOL power lithium battery are met by designing and integrating the functions of all the devices.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery safety detection technical field especially relates to a kind of eVTOL power lithium battery thermal runaway and containment test device. BACKGROUND

[0002] As a strategic emerging industry, electric Vertical Take-off and Landing (eVTOL) is the "main force" of the current low-altitude economy development, and the main driving power of the current eVTOL is power lithium battery. Power lithium battery has high energy density and large capacity, and once thermal runaway occurs, it may cause high temperature, combustion, explosion and other consequences. In order to ensure the safety of eVTOL flight, civil aviation airworthiness regulations in the world have proposed that the power system used by eVTOL must meet the airworthiness test requirements of containment thermal runaway hazard (hereinafter referred to as "thermal runaway and containment"). That is, the hazard of power lithium battery thermal runaway must be controlled within the index range required by airworthiness regulations. Due to the limitation of current battery technology, the thermal runaway and containment test is difficult to pass. In the process of airworthiness certification of various eVTOL enterprises, the passing of power lithium battery thermal runaway and containment test is the most critical link. For thermal runaway and containment test, there is currently no systematic thermal runaway and containment test device for eVTOL power lithium battery. The device can be used to complete the thermal runaway and containment test verification and test evaluation analysis of eVTOL power lithium battery.

[0003] The existing patent, such as the Chinese utility model patent with the patent number CN202122608360.8 and the name "a power battery thermal runaway test device", discloses the following content: the utility model relates to the technical field of automobile, and specifically relates to a power battery thermal runaway test device. It includes a module assembly, an optical fiber system and a controller host. The optical fiber system is arranged inside the module assembly and transmits optical signals to the controller host. The utility model can conduct full-process temperature monitoring of all battery cells of the tested module from all directions and multiple points, including the surface temperature of the battery cell, the pole temperature of the battery cell, and the temperature of the NTC temperature sampling point inside the module. Through the above temperature monitoring, thermal runaway alarm can be realized more accurately. Although the above patent can monitor and alarm the temperature of each part of the battery cell, it cannot simulate the real working condition of battery thermal runaway and cannot realize thermal runaway and containment test of the power system. SUMMARY

[0004] In view of the lack of effective means for completing thermal runaway and containment test and evaluation analysis of eVTOL power lithium battery in the existing technology, the present application proposes a kind of eVTOL power lithium battery thermal runaway and containment test device.

[0005] In order to realize the above technical effects, the technical scheme of the utility model is as follows:

[0006] An eVTOL power lithium battery thermal runaway and containment test device, comprising a protection device, an initiation device, a video acquisition device, an infrared thermal imaging device, a gas data monitoring device, an electric heating signal acquisition device and a real-time monitoring platform; the protection device is placed with a battery to be tested, an initiation device, a video acquisition device, an infrared thermal imaging device, a gas data monitoring device and an electric heating signal acquisition device;

[0007] The initiation device is embedded in or closely attached to the battery to be tested;

[0008] The video acquisition device is arranged around the battery to be tested;

[0009] The infrared thermal imaging device is arranged at the front of the battery to be tested;

[0010] The gas data monitoring device is arranged at the pressure relief port of the battery to be tested;

[0011] The electric heating signal acquisition device is arranged inside and outside the battery to be tested;

[0012] The real-time monitoring platform is arranged outside the protection device, and the real-time monitoring platform is connected with the video acquisition device, the electric heating signal acquisition device, the infrared thermal imaging device and the gas data monitoring device;

[0013] The protection device is arranged in the test site.

[0014] Further, the initiation device is embedded in the battery to be tested, and the initiation device is an electric heating plate, which directly heats the battery internal cell.

[0015] Parallelly, the initiation device is placed outside the battery to be tested.

[0016] Further, the electric heating signal acquisition device comprises a thermocouple and a CAN signal acquisition output device.

[0017] Further, it further comprises a temperature control device, the temperature control device uses a heat preservation suit prepared from heat preservation materials, the heat preservation suit is provided with a battery pressure relief and data line reservation port, and the heat preservation suit structure comprises PTFE cloth, outer silicone coating cloth and aramid thread sewn high temperature magic tape from inside to outside.

[0018] The PTFE cloth and the outer silicone coating cloth are further provided with a heat preservation layer, and the electric heating wire of the heat preservation layer is connected with the storage battery and is powered and heated by the storage battery.

[0019] Further, the video acquisition device comprises a plurality of high-definition cameras and a plurality of explosion-proof cameras, the high-definition cameras are fixed at four corners of the protection device through tripods, and the explosion-proof cameras are opposite to the battery pressure relief ports.

[0020] Further, the real-time monitoring platform comprises a data processing instrument, a mobile receiving terminal and a data processing workstation.

[0021] Further, the gas data monitoring device comprises airtight tooling at the gas pressure relief port, and the airtight tooling is provided with a pressure transmitter, a temperature sensor, a signal transmitter and a gas flowmeter.

[0022] Further, the gas data monitoring device is matched with the battery pressure relief port of the battery to be tested.

[0023] The utility model has the advantages that:

[0024] 1. The application solves the problem that the eVTOL power lithium battery needs to carry out thermal runaway and containment test verification to meet airworthiness verification, and through the design of integrating the functions of various devices, the needs of completing the eVTOL power lithium battery pretreatment, thermal runaway initiation, data acquisition, real-time monitoring and containment analysis are met.

[0025] 2. The application solves the difficulty of real-time monitoring and data analysis of released gas when the eVTOL power lithium battery is subjected to thermal runaway test through the selection of the gas flowmeter and the design of the airtight tooling.

[0026] 3. The application solves the difficulty of heat preservation after the eVTOL power lithium battery is subjected to thermal runaway test pretreatment through the temperature control device.

[0027] 4. The protection device in the application can ensure that the thermal runaway test is safely carried out and will not cause harm to the experimenters and the environment. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The utility model is a whole structure block diagram.

[0029] Figure 2 The utility model provides a kind of gas flow rate test structure schematic view.

[0030] Figure 3 The utility model provides a kind of thermal runaway temperature control device structure schematic view.

[0031] Figure 4 The utility model provides a kind of thermal runaway initiation schematic view.

[0032] IN THE DRAWINGS:

[0033] 1 - battery to be tested, 101 - pressure relief port, 102 - battery cell, 103 - initiation device, 201 - high-definition camera, 202 - explosion-proof camera, 301 - infrared thermal imaging device, 401 - gas flow meter, 501 - electric heating signal acquisition device, 502 - CAN signal acquisition output device, 601 - collection filter screen, 602 - explosion-proof wall, 603 - smoke collection hood, 604 - metal base, 701 - data processing instrument, 702 - data processing workstation, 703 - mobile receiving terminal, 8 - temperature control device, 801 - battery, 802 - thermal insulation layer, 803 - PTFE cloth, 804 - outer layer of silica gel coating cloth, 805 - high-temperature magic tape, 806 - battery pressure relief and data line reserved port, 402 - gas pressure relief port, 403 - pressure transmitter, 404 - temperature sensor, 405 - signal transmitter, 407 - airtight tool. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, which are implemented on the premise of the technical solutions of the present application, and detailed implementation modes and specific operation processes are given, but the protection scope of the present application is not limited to the following embodiments.

[0035] It should be pointed out that all the directional indications in the embodiments of the present application (such as two sides, edges, up, down, left, right, front, back, middle, top end, bottom end, tail, axial, radial,...) are only used to explain the relative position relationship, motion state and the like between components in a certain specific posture (as shown in the drawings), and when the specific posture changes, the directional indications also change accordingly.

[0036] Embodiment 1

[0037] As shown in Figure 1 , an eVTOL power lithium battery thermal runaway and containment test device includes a protection device, an initiation device 103, a video acquisition device, an infrared thermal imaging device 301, a gas data monitoring device, an electric heating signal acquisition device 501, and a real-time monitoring platform;

[0038] The protection device is placed with a battery to be tested 1, an initiation device 103, a video acquisition device, an infrared thermal imaging device 301, a gas data monitoring device, and an electric heating signal acquisition device 501;

[0039] The initiation device 103 is embedded or closely attached to the battery to be tested 1, and the initiation mode includes but is not limited to heating to initiate the thermal runaway of the battery to be tested 1;

[0040] The video acquisition device is arranged around the battery to be tested 1, and is used to acquire video signals of the whole test process of the battery to be tested 1;

[0041] The infrared thermal imaging device 301 is arranged at the front of the battery to be tested 1, and is used to collect infrared thermal imaging signals of the battery to be tested 1 during the whole test process.

[0042] The gas data monitoring device can be arranged at the pressure relief port 101 of the battery to be tested 1, and is used to collect related data of the gas release generated during the whole test process. The pressure relief port 101 belongs to the structure of the battery itself, and the gas data monitoring device is used to collect the gas data at the pressure relief port 101. The gas data monitoring device includes temperature collection, pressure collection, a gas flow meter 401 and a gas tightness tool 407.

[0043] The electric heating signal collection device 501 is arranged inside and outside the battery to be tested 1, and is used to collect signals such as current, voltage and temperature of the battery to be tested 1 through a sensor;

[0044] The real-time monitoring platform is arranged outside the protection device, and is connected with the video collection device, the electric heating signal collection device 501, the infrared thermal imaging device 301 and the gas data monitoring device. The real-time monitoring platform is used to collect and process data information of the collection device and the monitoring device.

[0045] The protection device is arranged at the side of the test site, at the top and around the battery to be tested 1, and is used to block and eliminate gases, flames, releases and fragments generated by the thermal runaway test, so as to prevent the gases, flames, releases and fragments from causing harm to the surrounding personnel and environment.

[0046] The application solves the problem of thermal runaway and containment test verification of eVTOL power lithium batteries to meet the needs of airworthiness verification. By designing and integrating the functions of various devices, the needs of eVTOL power lithium battery pretreatment, thermal runaway initiation, data collection, real-time monitoring and containment analysis are met.

[0047] Embodiment 2

[0048] As shown in Figure 1 An eVTOL power lithium battery thermal runaway and containment test device includes a protection device, an initiation device 103, a video collection device, an infrared thermal imaging device 301, a gas data monitoring device, an electric heating signal collection device 501 and a real-time monitoring platform.

[0049] The protection device is placed with the battery to be tested 1, the initiation device 103, the video collection device, the infrared thermal imaging device 301, the gas data monitoring device and the electric heating signal collection device 501.

[0050] The initiation device 103 is embedded in or closely attached to the battery to be tested 1, and the initiation methods include but are not limited to heating to initiate thermal runaway of the battery to be tested 1.

[0051] The video collection device is arranged around the battery to be tested 1, and is used to collect video signals of the battery to be tested 1 during the whole test process.

[0052] The infrared thermal imaging device 301 is arranged at the front of the battery to be tested 1, and is used to collect infrared thermal imaging signals of the battery to be tested 1 during the whole test process;

[0053] The gas data monitoring device can be arranged at the pressure relief port 101 of the battery to be tested 1, and is used to collect related data of the gas release generated during the whole test process. The pressure relief port 101 belongs to the structure of the battery itself, and the gas data monitoring device is used to collect the gas data at the pressure relief port 101. The gas data monitoring device includes temperature collection, pressure collection, a gas flow meter 401 and a gas tightness tool 407.

[0054] The electric heating signal collection device 501 is arranged inside and outside the battery to be tested 1, and is used to collect signals such as current, voltage and temperature of the battery to be tested 1 through sensors;

[0055] The real-time monitoring platform is arranged outside the protection device, and is connected with the video collection device, the electric heating signal collection device 501, the infrared thermal imaging device 301 and the gas data monitoring device; and is used to collect and process data information of the collection device and the monitoring device.

[0056] The protection device is arranged at the side of the test site, the top and the periphery of the battery to be tested 1, and is used to block and eliminate the gas, flame, release and fragments generated in the thermal runaway test, so as to prevent the harm to the surrounding personnel and environment.

[0057] The initiation device 103 can be embedded in the battery to be tested 1, and the heating power thereof is adjusted according to the size and power of the battery cell 102 of the battery to be tested 1. The initiation device 103 is an electric heating plate, which directly heats the battery cell 102 inside the battery. The connection relationship is that the initiation device 103 is started by power supply, the temperature of the heating plate rises to heat the battery cell 102. The principle is that the temperature of the heating plate rises to heat the battery, and when the temperature inside the battery reaches a certain temperature, the negative electrode SEI film in the battery cell 102 decomposes to initiate thermal runaway. This heating method is to accurately initiate the battery cell 102 individually or in multiple, and the number and position of the battery cell 102 to be initiated can be selected.

[0058] The initiation device 103 can also be placed outside the battery to be tested 1, and is used to initiate thermal runaway by wrapping the battery to be tested 1, and the size thereof is matched with the size and shape of the battery to be tested 1. The initiation device 103 is an electric heating plate, which heats the battery from the outside of the battery to be tested 1. The external initiation device 103 and the initiation principle are consistent with the embedded one, but the initiation in this way is to initiate the whole battery, and the initiation is more violent, but the specific initiation position and the number of the battery cell 102 cannot be selected.

[0059] The electric heating signal collection device 501 includes a thermocouple and a CAN signal collection and output device 502. For example, Figure 4The electric heating signal acquisition device 501 in the battery pack 1, the thermal signal (temperature) is specifically from three kinds of thermocouples of K type tablet, contact and metal probe. The electric signal acquisition is collected through the CAN signal acquisition output device 502 of the battery 1BMS system.

[0060] Each temperature monitoring point should be arranged with at least one suitable type of thermocouple, and the temperature monitoring point should be arranged according to the following requirements:

[0061] a) Each battery cell 102 in the battery pack should be arranged with a corresponding temperature monitoring point;

[0062] b) The total positive and negative copper bar of the battery pack should be arranged with a temperature monitoring point;

[0063] c) The battery pack outer box should be arranged with a temperature monitoring point near the thermal runaway battery cell 102;

[0064] d) The battery pack explosion-proof valve surface and the corresponding gas overflow position should be arranged with a temperature monitoring point;

[0065] e) The battery pack mechanical fixing structure should be arranged with a temperature monitoring point;

[0066] f) The positive and negative electrode high-voltage wire harness surface of the battery pack should be arranged with a temperature monitoring point;

[0067] g) All the water inlet and outlet of the battery pack should be arranged with a temperature monitoring point;

[0068] h) The battery pack is installed in the arm or wing structure wrapped by the skin, and the inner surface of the skin should be placed with multiple temperature monitoring points (if any).

[0069] As shown in Figure 3 The temperature control device 8 is also included, which ensures that the test battery 1 maintains the pretreatment temperature after a period of time and facilitates the movement, installation and collection of the test battery 1. The temperature control device 8 is arranged in the battery pretreatment and handling process. The temperature control device 8 is made of heat preservation material and is convenient to disassemble. The heat preservation suit is provided with a battery pressure relief and data line reservation port 806, and the heat preservation suit structure includes PTFE cloth, outer silicone coated cloth 804 and aramid thread sewn high temperature magic tape 805 from inside to outside.

[0070] A heat preservation layer 802 is also arranged between the PTFE cloth and the outer silicone coated cloth 804, which can be an electric heating wire to ensure uniform and controllable temperature and temperature display. The electric heating wire of the heat preservation layer 802 is connected with the storage battery 801 and is powered by the storage battery 801 to generate heat.

[0071] The video acquisition device includes a plurality of high-definition cameras 201 and a plurality of explosion-proof cameras 202. The high-definition cameras 201 are fixed on the four corners of the protection device through tripods. The high-definition cameras 201 can collect video signals from different angles of the battery 1 to be tested. The explosion-proof cameras 202 are opposite to the battery pressure relief port 101 at a distance of 50 cm, and are used to collect the pressure relief and possible disintegration, combustion, explosion and other phenomena of the battery 1 to be tested in thermal runaway. The above-mentioned video signals are converted into the cloud and the real-time monitoring platform through the mobile receiving terminal 703 in real time.

[0072] The real-time monitoring platform includes a data processing instrument 701 (Rikuo LR8450), a mobile receiving terminal 703 (Dahua WDR5620) and a data processing workstation 702. The data processing instrument 701 is used to collect the voltage, current, temperature and other signals of the battery 1 to be tested during the whole test process and to process the data, so as to realize static threshold alarm and dynamic change response of the data. The mobile receiving terminal 703 is used to receive the video signals and convert them into the cloud and the data processing workstation 702 in real time. The data processing workstation 702 is used to output real-time video signals and infrared thermal imaging signals.

[0073] The protection device includes thermal runaway hazard protection measures above, on the side and at the bottom of the battery 1 to be tested. The function of the protection device is to prevent the overflow and splashing of high-temperature fragments with large particle sizes generated by the test battery in thermal runaway and even disintegration.

[0074] As shown in FIG. 1, Figure 2 The gas data monitoring device includes airtight tooling 407 at the gas pressure relief port 402. The airtight tooling 407 can be respectively installed with a pressure transmitter 403, a temperature sensor 404, a signal transmitter 405 and a gas flow meter 401. The gas enters the test structure from the pressure relief port 101, is tested by the above-mentioned installed pressure transmitter 403, temperature sensor 404 and gas flow meter 401, and then the test signals are transmitted to the real-time monitoring platform. The airtight tooling 407 is attached to the pressure relief port 101 to ensure airtightness. The temperature sensor 404 is used to measure the gas temperature, the pressure transmitter 403 is used to measure the gas pressure, and the gas flow meter 401 is used to measure the gas flow rate. The connection mode of the airtight tooling 407 and the gas pressure relief port 402 can be threaded connection, welding or flange connection. The connection mode needs to be matched according to the battery pressure relief port 101.

[0075] The gas data monitoring device is adapted to the battery pressure relief port 101 of the battery 1 to be tested, including but not limited to the use of airtight tooling 407, sealing kits and other accessories. The gas data monitoring device needs to measure and record the pressure, temperature and flow rate of the released gas in real time, and can ensure that it does not hinder the gas release at the pressure relief port 101.

[0076] The battery under test 1 includes, but is not limited to, a power lithium battery and a corresponding aircraft component.

[0077] The initiation device 103 can use a charging device to initiate thermal runaway. The device performance meets the specifications of the battery under test 1 to ensure smooth initiation of thermal runaway of the battery under test 1.

[0078] The temperature control device 8 can use an insulation sleeve or an electric heating sleeve (containing a heating device).

[0079] The application solves the problem of eVTOL power lithium battery thermal runaway and containment test verification to meet airworthiness verification needs. By designing and integrating the functions of various devices, the needs of eVTOL power lithium battery pretreatment, thermal runaway initiation, data collection, real-time monitoring and containment analysis are met. Through the selection of gas flow meter 401 and the design of airtight tooling 407, the difficulty of real-time monitoring and data analysis of released gas during the thermal runaway test of eVTOL power lithium battery is solved. The temperature control device 8 in the application solves the difficulty of heat preservation after the pretreatment of eVTOL power lithium battery during thermal runaway test. The protective device in the application can ensure the safe performance of the thermal runaway test and will not cause harm to the experimenters and the environment.

[0080] Embodiment 3

[0081] Confirm the size, weight, voltage, current and pressure relief port flow rate of the battery under test to confirm its consistency.

[0082] The protective device can include an explosion-proof wall 602 and a collection filter screen 601.

[0083] The explosion-proof wall 602 is installed according to the side protection position.

[0084] The top collection filter screen 601 is arranged above the explosion-proof wall 602.

[0085] The high-definition camera 201 is arranged according to the diagonal line, so that it can be aligned with the predetermined position of the battery, focused, and the main body of the battery is located in the center of the screen, and the area accounts for about 20% of the entire screen.

[0086] The explosion-proof camera 202 is arranged above the pressure relief port. It can face the pressure relief port position.

[0087] The infrared thermal imager 301 is arranged behind the battery under test, and is connected with a computer.

[0088] Two data processing workstations 702 are arranged outside the explosion-proof wall 602.

[0089] The data processing instrument 701 is arranged at the same position and connected with the collection device for data collection and arrangement.

[0090] Water-based fire extinguisher and lithium battery special fire extinguisher 605 are placed outside the explosion-proof wall 602.

[0091] The battery under test 1 is pretreated, then placed in the battery under test, the gas flow meter 401 is installed, and the burn-resistant base 604 is placed.

[0092] The real-time monitoring platform 7 is started, the temperature detection device 501 is connected, the voltage CAN receiving device 502 is set, and the alarm parameter is set.

[0093] The initiation device 103 is started, and the thermal runaway of the battery under test is initiated.

[0094] The thermal runaway test is monitored through the real-time monitoring platform, when the thermal runaway test is initiated, the power supply of the initiation device 103 is cut off. The real-time picture of the battery thermal runaway is observed through the video acquisition device 2 and the infrared thermal imager 301, and the data processing instrument 701 is used to continue to monitor the temperature and voltage signal of the battery, so as to confirm whether the thermal runaway test is completed.

[0095] Embodiment 4

[0096] The utility model embodiment provides a kind of eVTOL power lithium battery thermal runaway and containment test device, and initiation device 103, video acquisition device, infrared thermal imaging device 301, gas data monitoring device, electric heating signal acquisition device 501, real-time monitoring platform and protection device of thermal runaway testing device initiation device 103;

[0097] Initiation device 103 is embedded or close to the battery under test 1, including but not limited to heating initiation battery under test 1 thermal runaway;

[0098] Temperature control device 8 needs to be easily removed, to ensure that it maintains the initiation temperature not to drop within a period of time after the power lithium battery is pretreated, and facilitates the movement, installation and sampling of power lithium battery and other steps.

[0099] Video acquisition device is arranged around the battery under test 1, for collecting the video signal of the whole process of thermal runaway of test battery;

[0100] Infrared thermal imaging device 301 is arranged at the front of the battery under test 1, for collecting the infrared thermal imaging signal of the whole process of thermal runaway of test battery;

[0101] Gas data monitoring device is arranged at the pressure relief port 101 of the battery under test 1, for collecting the gas signal generated when the battery under test 1 occurs thermal runaway;

[0102] Electric heating signal acquisition device 501 is arranged inside and outside the battery under test 1, for collecting the current, voltage, temperature and other signals of the battery under test 1 through sensor;

[0103] Real-time monitoring platform is arranged outside the test site, used for collecting and processing data information of the collection system, monitoring device and the like.

[0104] The protective device is arranged on the side of the test site, on the top and around the to-be-tested battery 1, used for blocking and eliminating the hazards caused by the thermal runaway test.

[0105] In the optional embodiment, the initiation device 103 can use a heating plate or a charging and discharging device.

[0106] In the optional embodiment, the temperature control device 8 can use an insulation sleeve or an electric heating sleeve.

[0107] Example 5

[0108] The utility model embodiment provides a kind of eVTOL power lithium battery thermal runaway and containment test device, a kind of eVTOL power lithium battery thermal runaway and containment test device includes initiation device 103 and the thermal runaway data acquisition device of any one of preceding embodiment;

[0109] The initiation device 103 can be embedded in the battery, and its heating power will be adjusted according to the size and power of the battery cell 102 of the to-be-tested battery 1;The initiation device 103 can also be externally placed outside the battery, and the thermal runaway initiation is carried out by wrapping the to-be-tested battery 1, and its size closely fits the size and shape of the to-be-tested power system battery.

[0110] The temperature control device 8 is made of multiple layers of materials such as insulation materials and temperature-resistant materials, and its size closely fits the size of the power lithium battery and is easy to disassemble.The device can also contain a heating component to ensure uniform and controllable temperature and temperature display.

[0111] The video acquisition device includes multiple high-definition cameras 201 and multiple explosion-proof cameras 202, and is arranged around the to-be-tested battery 1.The high-definition cameras 201 can collect video signals from different angles of the to-be-tested battery 1, and the explosion-proof cameras 202 are used to collect the pressure relief and possible combustion, explosion and other phenomena of the to-be-tested battery 1 when thermal runaway occurs.The above-mentioned video signals are converted into the cloud and the real-time monitoring platform in real time through the mobile receiving terminal 703.

[0112] The real-time monitoring platform includes a data processing instrument 701 (such as a Rikky LR8450), a mobile receiving terminal 703 (such as a Dahua WDR5620) and a data processing workstation 702, and the data processing instrument 701 is used to collect and process the voltage, current, temperature and other signals of the to-be-tested battery 1 during the whole test process, realize threshold alarm and dynamic range monitoring, and the mobile receiving terminal 703 is used to receive video signals.

[0113] In an optional embodiment, the video acquisition device, the infrared thermal imaging device 301 acquires information and transmits the information to the data processing workstation 702 in real time, the electric heating signal acquisition device 501 and the gas data monitoring device acquire information and transmit the information to the data processing instrument 701 in real time.

[0114] In an optional embodiment, the real-time monitoring platform automatically alarms according to the set threshold value, and then confirms the completion of the thermal runaway triggering, and the triggering device 103 is powered off.

[0115] The eVTOL power lithium battery thermal runaway and containment test device provided in the embodiment of the utility model ensures the safe performance of the test through the protection device. The protection device includes thermal runaway hazard protection measures above, on the side of the battery to be tested 1 and the base. The function of the protection device is to prevent the release of high-temperature debris of large particle size or even disintegration of the battery to be tested 1 from overflowing when the battery to be tested 1 is in thermal runaway. Further, the protection device includes a top protection part, a side protection part and a bottom protection part. The side protection part can be a plurality of explosion-proof walls 602. The material of the explosion-proof wall 602 is a high-molecular flame-retardant material. The explosion-proof wall 602 is supported by a rigid body structure. The hazards of the battery to be tested 1 are limited within the protection device by stacking the explosion-proof wall 602. The stacking of the protection device needs to be changed according to the specifications, shapes, sizes of the battery to be tested 1 and the arrangement of the corresponding aircraft components. The top protection part includes a fume hood 603 and a collection filter screen 601. The fume hood 603 is placed on the side or above the gas data monitoring device at the pressure relief port 101. The material of the fume hood 603 is an alloy material, which is used to collect the gas, smoke and dust generated by thermal runaway. The top collection filter screen 601 is a high-strength steel wire with a fine mesh structure, which is installed on the top of the entire side protection part module to prevent the overflow of large-particle-size explosion dust and debris. The bottom protection part is a metal base 604 with a burn-resistant top, which is used to place the battery to be tested 1.

[0116] In an optional embodiment, the protection device can selectively use the fume hood 603 and the burn-resistant table.

Claims

1. A test device for thermal runaway and containment of eVTOL power lithium batteries, characterized in that: It includes a protective device, an initiating device (103), a video acquisition device, an infrared thermal imaging device (301), a gas data monitoring device, an electrothermal signal acquisition device (501), and a real-time monitoring platform; the protective device contains the battery under test (1), the initiating device (103), the video acquisition device, the infrared thermal imaging device (301), the gas data monitoring device, and the electrothermal signal acquisition device (501). The initiation device (103) is embedded in or attached to the battery under test (1). The video acquisition device is arranged around the battery (1) under test; The infrared thermal imaging device (301) is positioned directly in front of the battery under test (1); The gas data monitoring device is located at the pressure relief port (101) of the battery under test (1); The electrothermal signal acquisition device (501) is arranged inside and outside the battery under test (1); The real-time monitoring platform is located outside the protective device and is connected to the video acquisition device, the electric heating signal acquisition device (501), the infrared thermal imaging device (301), and the gas data monitoring device. The protective device is located at the test site.

2. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The initiation device (103) is embedded in the battery under test (1). The initiation device (103) is an electric heating plate, which directly heats the battery cell (102) inside the battery.

3. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The initiation device (103) is placed outside the battery (1) under test.

4. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The electrothermal signal acquisition device (501) includes a thermocouple and a CAN signal acquisition and output device (502).

5. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: It also includes a temperature control device (8), which includes a thermal insulation jacket made of thermal insulation material. The thermal insulation jacket has a battery pressure relief and data cable reserved opening (806). The structure of the thermal insulation jacket includes a PTFE cloth, an outer silicone coated cloth (804), and a high-temperature Velcro (805) sewn with aramid thread, which are located from the inside to the outside.

6. The eVTOL power lithium battery thermal runaway and containment test device according to claim 5, characterized in that: An insulation layer (802) is also provided between the PTFE cloth and the outer silicone coated cloth (804). The heat tracing wire of the insulation layer (802) is connected to the storage battery (801) and is powered by the storage battery (801) for heating.

7. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The video acquisition device includes multiple high-definition cameras (201) and multiple explosion-proof cameras (202). The high-definition cameras (201) are fixed at the four corners of the protective device by tripods, and the explosion-proof cameras (202) are facing the battery pressure relief port (101).

8. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The real-time monitoring platform includes a data processor (701), a mobile receiving terminal (703), and a data processing workstation (702).

9. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The gas data monitoring device includes an airtight fixture (407) at the gas pressure relief port (402), in which a pressure transmitter (403), a temperature sensor (404), a signal transmitter (405), and a gas flow meter (401) can be installed respectively.

10. The eVTOL power lithium battery thermal runaway and containment test device according to claim 1, characterized in that: The gas data monitoring device is adapted to the battery pressure relief port (101) of the battery under test (1).

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