A power battery system external fire experiment testing device

Abstract

A kind of power battery system external fire experiment test device, comprising: main frame;Oil pan assembly, oil pan assembly is arranged in the inside of main frame;Waste liquid collection device, waste liquid collection device is arranged in the inside of main frame, waste liquid collection device is below oil pan assembly and is communicated with the bottom of oil pan assembly;Firebrick, firebrick is arranged in the inside of main frame and is located above oil pan assembly;Sample combustion rack, sample combustion rack is arranged in the inside of main frame and is located above firebrick;Heat reflecting cover, heat reflecting cover is arranged above main frame and is fixedly connected with main frame;Waste gas collection device, waste gas collection device is arranged above heat reflecting cover and is communicated with the top of heat reflecting cover.The power battery system external fire experiment test device of the utility model, it is reasonable in design, it solves the problems, such as serious energy waste, uneven heat radiation distribution, lack of integrated safety protection system and imperfect experimental waste gas treatment in prior art test device.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically to a test device for external fire test of a power battery system. Background Technology

[0002] With the global surge in electrification of the automotive industry, the penetration rate and market share of new energy vehicles are rising rapidly. Whether for passenger cars or commercial vehicles, the battery, as the "heart" of their power source, determines the reliability of the entire vehicle through its safety performance. However, safety concerns such as water damage, spontaneous combustion, and short circuits have caused significant distress to users and have become a core area of ​​focus and urgent need for breakthroughs for major battery manufacturers, vehicle manufacturers, and the market. To ensure the safety of new energy vehicles, fire safety testing of power battery systems has become a mandatory certification process. For example, according to GB / T 31467.3-2015 "Test Procedures for Lithium-ion Power Battery Packs and Systems for Electric Vehicles Part 3: Safety Requirements and Test Methods" and UNECE R100 standards, battery systems must pass rigorous tests involving direct exposure to external flames, and must not explode within two hours after the test. Only after undergoing such stringent testing and passing a series of multi-dimensional safety verifications can a sample qualify for market entry.

[0003] The existing external fire test equipment for power battery systems has the following drawbacks:

[0004] 1. Energy waste and environmental pollution problems

[0005] Traditional combustion devices suffer from significant energy waste. They cannot precisely control the combustion range based on sample size and lack waste fuel collection devices. In actual testing, regardless of sample size, the combustion device may burn within a fixed range and intensity, leading to unnecessary energy consumption. Furthermore, unburned waste fuel is not effectively collected and is indiscriminately discharged into the environment, causing not only energy waste but also environmental pollution.

[0006] 2. Uneven distribution of thermal radiation affects experimental repeatability.

[0007] Open combustion results in uneven distribution of thermal radiation. In an open combustion environment, heat diffuses outwards, causing inconsistent thermal radiation received by the surface of the sample. This means that the thermal radiation received by the sample may differ in each experiment, thus affecting the repeatability of the experimental results.

[0008] 3. The lack of an integrated safety protection system poses a risk of secondary explosion.

[0009] Existing testing equipment lacks an integrated safety protection system, which poses a risk of secondary deflagration during experiments. In external fire tests of power battery systems, the battery may experience thermal runaway due to high temperatures and other factors, generating flammable gases. Without effective safety measures, these flammable gases could trigger secondary deflagration if they encounter an ignition source or reach a certain concentration, causing serious harm to personnel and equipment.

[0010] 4. The experimental waste gas treatment is inadequate and does not meet environmental protection requirements.

[0011] The experiment generates a large amount of waste gas, including harmful gases from combustion and particulate matter. However, existing testing equipment is inadequate in treating these waste gases, which are then directly released into the environment without effective treatment, failing to meet environmental protection requirements. For example, burning gasoline produces harmful gases such as carbon monoxide, carbon dioxide, and nitrogen oxides, as well as particulate matter; direct emission of these gases would severely impact air quality.

[0012] While there are some patents that address issues related to external fire testing of power battery systems, they all have certain limitations.

[0013] Chinese patent CN208622852U (Fire Monitoring Device for Power Batteries of New Energy Vehicles): This patent features a simple structure and timely processing, maximizing the intelligence of fire response. However, its monitoring coverage of battery status is limited and may not be able to comprehensively monitor the battery's condition under various conditions. The spray angle and range of the cryogenic nitrogen nozzle need optimization to ensure more effective fire extinguishing. The response and disconnection speed of the electric telescopic rod need improvement to ensure timely response in the event of a fire. The structure of the contact head and contact slot needs improvement to enhance their connection stability and sealing, preventing loosening or leakage during use.

[0014] Chinese patent CN110611129A (Device for Preventing Thermal Runaway and Explosion of New Energy Vehicle Batteries): This patent enables automotive batteries to have temperature control, insulation, and flame retardancy functions, preventing thermal runaway and explosion. However, the formulation of the circulating fluid needs optimization to improve its cooling and flame retardant properties. The structure of the liquid cooling system needs improvement to enhance heat dissipation efficiency. The insulation and cooling properties of the transformer oil need to be improved to better ensure the safe operation of the battery.

[0015] Therefore, developing an external fire test device for power battery systems to solve the above-mentioned technical problems is of great practical significance. Utility Model Content

[0016] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide an external fire test device for power battery systems. The device is reasonably designed and solves the problems of serious energy waste, uneven heat radiation distribution, lack of integrated safety protection system, and imperfect treatment of experimental exhaust gas in the existing external fire test devices for power battery systems. It has broad application prospects.

[0017] Technical solution: A test device for external fire testing of a power battery system, comprising:

[0018] Main framework;

[0019] An oil pan assembly, wherein the oil pan assembly is disposed inside the main frame;

[0020] Waste liquid collection device, which is installed inside the main frame, located below the oil pan assembly and connected to the bottom of the oil pan assembly;

[0021] Refractory bricks, which are disposed inside the main frame and above the oil pan assembly;

[0022] A sample combustion rack is disposed inside the main frame and above the refractory bricks;

[0023] A heat reflector, which is disposed above the main frame and fixedly connected to the main frame;

[0024] An exhaust gas collection device is disposed above a heat reflector and connected to the top of the heat reflector.

[0025] The testing device described in this utility model includes a main frame, an oil pan assembly, a waste liquid collection device, refractory bricks, a sample combustion rack, a heat reflector, and a waste gas collection device. The entire testing device forms a complete system, with each component working together to complete the external fire test of the power battery system. Specifically, the main frame provides support and protection for the entire device; the oil pan assembly provides the fuel required for combustion; the waste liquid collection device collects residual fuel to prevent fuel spillage that could cause safety hazards and environmental pollution; the refractory bricks withstand high temperatures and protect other parts of the device; the sample combustion rack holds the sample to be tested; the heat reflector prevents heat loss and ensures uniform heat radiation distribution; and the waste gas collection device collects the waste gas generated during combustion, meeting environmental protection requirements. In actual testing, the power battery system to be tested is placed on the sample combustion rack, and the flame generated by the combustion of fuel in the oil pan assembly conducts a fire test on the sample.

[0026] Furthermore, in the aforementioned external fire test device for the power battery system, the main frame is welded from metal square tubes, and a heat insulation layer is provided inside the main frame. The heat insulation layer is made of fireproof material. The metal square tubes include 304 stainless steel square tubes, the thickness of the heat insulation layer ranges from 1 to 10 mm, and the fireproof material includes basalt fireproof cotton.

[0027] The main frame provides the basic support structure for the entire testing device, and is used to install other components of the testing device, so that other components are located inside the frame or connected to the frame, playing the role of supporting and protecting the internal components.

[0028] The shape of the main frame includes, but is not limited to, a rectangular frame, a circular frame, and a polygonal frame, to adapt to the layout and usage requirements of different testing devices. Preferably, the shape of the main frame is a rectangular frame.

[0029] The main frame is provided with a connection structure for installing other components. The connection structure includes, but is not limited to, bolt connection holes, welding connection seats, and slots, so as to facilitate the connection of different types of components with the frame.

[0030] The metal square tubes include, but are not limited to, 304 stainless steel square tubes, and can also be aluminum alloy square tubes, carbon steel square tubes, or other metal materials with certain strength and corrosion resistance. The fireproof materials include, but are not limited to, basalt fireproof cotton, and can also be ceramic fiber cotton, rock wool, or other materials with fireproof and heat-insulating properties.

[0031] Preferably, the thickness of the heat insulation layer is 5 mm.

[0032] The main frame is also provided with reinforcing ribs or supporting beams. The material of the reinforcing ribs or supporting beams may be the same as or different from the material of the metal square tubes of the main frame, so as to enhance the structural strength and stability of the main frame.

[0033] The dimensions of the main frame are adjusted according to the actual needs of the testing device.

[0034] Furthermore, in the aforementioned external fire test device for the power battery system, the oil pan assembly includes a fuel pan and an igniter. The igniter is mounted on the fuel pan and is used to ignite the fuel in the fuel pan. The fuel pan includes several independent fuel boxes, each of which has a through hole on its side, and the through hole is connected to a waste liquid collection device located at the bottom of the oil pan assembly. The fuel box has a square shape, and its dimensions range from 100 to 200 mm in length and width, and from 100 to 200 mm in height.

[0035] During the experiment, the required number of fuel cartridges can be selectively ignited according to the size of the sample to be tested, thereby precisely controlling the combustion range and avoiding unnecessary energy waste. The connection methods between several independent fuel cartridges include, but are not limited to, detachable connections, fixed connections, or movable connections, to facilitate installation, disassembly, and maintenance.

[0036] The fuel box has a shape including, but is not limited to, square, and the fuel includes, but is not limited to, gasoline.

[0037] Preferably, the fuel pan is a gasoline pan and the igniter is a piezoelectric igniter.

[0038] The waste liquid collection device is used to collect residual unburned fuel in the fuel pan, preventing fuel spillage and reducing environmental pollution. The waste liquid collection device connects to the fuel pan through a through-hole on its side. Fuel is collected after testing by installing a valve at the through-hole (the valve is closed during testing to prevent fuel from flowing into the waste liquid collection device; after testing, the valve opens to allow residual gasoline in the fuel pan to flow into the waste liquid collection device through the through-hole), or by installing an adjustable baffle or barrier between the fuel pan and the waste liquid collection device (during testing, the baffle or barrier is at a high position to prevent fuel from flowing into the waste liquid collection device; after testing, the height of the baffle or barrier is lowered, and fuel in the fuel pan flows into the waste liquid collection device using the liquid level difference and gravity).

[0039] Furthermore, in the aforementioned external fire test device for the power battery system, the heat reflector is provided with an inner liner made of heat-insulating material; the top of the heat reflector is provided with an opening, and the heat reflector is connected to the exhaust gas collection device through the opening.

[0040] The heat reflector is located in the combustion zone of the main frame. Its lining is a heat-insulating material with specific properties, including low thermal conductivity, good high-temperature resistance and thermal stability, and a certain porosity. The heat reflector prevents heat loss due to open combustion, ensuring uniform heat radiation distribution on the sample surface, thus improving the repeatability and reliability of experimental data and reducing the temperature difference on the sample surface. The exhaust gas collection device collects exhaust gas through an opening at the top of the heat reflector; the position and size of this opening can be adjusted according to actual needs. The exhaust gas collection device includes filtration and purification units for further processing the collected exhaust gas to meet stricter environmental emission standards.

[0041] Furthermore, in the aforementioned external fire test device for the power battery system, the dimensions of the heat reflector range from 3000 to 4000 mm in length, 2000 to 3000 mm in width, and 750 to 850 mm in height; the heat insulation material is a ceramic fiber material with a thermal conductivity of 0.05 to 0.15 W / (m·K), a long-term temperature resistance of 1200 to 1300℃, a short-term temperature resistance of 1400 to 1450℃, and a porosity of 75 to 85%.

[0042] Before the thermal reflector is activated, the surface temperature difference of the sample being tested is greater than 200°C, but after activation, it can be reduced to below 50°C.

[0043] Furthermore, the aforementioned external fire test device for the power battery system also includes: a traction device, which is disposed on the side of the main frame; the traction device includes traction device A, traction device B, and traction device C, which are respectively connected to the oil pan assembly, refractory bricks, and sample combustion rack, and are used to pull the oil pan assembly, refractory bricks, and sample combustion rack to move forward and backward inside the main frame.

[0044] The traction device includes, but is not limited to, a chain drive, a belt drive, or an electric push rod device, used to move the position of the oil pan assembly, refractory bricks, and sample combustion rack.

[0045] Preferably, the main frame is provided with a track groove on its side to facilitate the movement of the oil pan assembly, refractory bricks, and sample combustion rack by the traction device.

[0046] Furthermore, the aforementioned external fire test device for the power battery system also includes: a control cabinet, which is located on one side of the main frame; the control cabinet is electrically connected to traction device A, traction device B, and traction device C respectively, and is used to control traction device A, traction device B, and traction device C respectively.

[0047] The control cabinet is the core of the entire testing device.

[0048] Preferably, the control cabinet uses an industrial-grade PLC (e.g., Siemens S7-1500) and a touch screen HMI (e.g., 10.1-inch).

[0049] Preferably, the control cabinet is connected to the igniter and the corresponding oil pan assembly traction device A, the corresponding refractory brick traction device B, and the corresponding sample combustion rack traction device C via wiring to control these components.

[0050] Furthermore, in the aforementioned external fire test device for the power battery system, the control cabinet controls the traction device A to move the oil pan assembly within the main frame, and the distance between the oil pan assembly and the sample combustion rack is adjustable from 200 to 900 mm; the control cabinet is electrically connected to the igniter and is used to control the igniter to perform ignition operations.

[0051] The adjustable design described above can meet the testing requirements of various standards, including but not limited to UL2580 and ECE R100.

[0052] Furthermore, the aforementioned external fire test device for the power battery system also includes: a flame temperature sensor, which is installed on one side of the oil pan assembly and is used to collect the flame temperature in real time. The flame temperature sensor is communicatively connected to the control cabinet; and a closed-loop servo system, which is connected to both the traction device and the control cabinet and is used to receive instructions from the control cabinet and drive the traction device to move accurately.

[0053] Preferably, the flame temperature sensor is a type K thermocouple. The type K thermocouple acquires the flame temperature in real time at a sampling frequency of 10Hz, and transmits the acquired temperature data to the control cabinet, providing data support for the control cabinet's adaptive PID temperature control algorithm. It is typically installed close to the flame to accurately measure the flame temperature.

[0054] The closed-loop servo system is used to control the traction device, achieving multi-axis coordinated motion control with a positioning accuracy of ±0.5mm. It is connected to the control cabinet and the traction device, receiving commands from the control cabinet and driving the traction device to move accurately.

[0055] To enable remote control, a remote control component is also included. This component includes a 4G / 5G module connected to the control cabinet for transmitting real-time data to a remote monitoring terminal. The remote control component also includes application software that communicates with the 4G / 5G module via a network to enable remote operation and monitoring of the entire testing device.

[0056] The beneficial effects of this utility model are as follows: The external fire test device for the power battery system described in this utility model accurately controls the combustion range and collects waste liquid. Several independent fuel boxes are set in the fuel pan. During the experiment, fuel can be injected into a specific number of fuel boxes according to the size of the sample being tested, precisely controlling the combustion range. Through holes are provided on the sides of each fuel box, connecting to the waste liquid collection device at the bottom. This avoids the problem of traditional combustion devices being unable to accurately control the combustion range according to the sample size, reducing energy waste, effectively collecting residual unburned fuel, preventing fuel overflow and fire hazards, and reducing environmental pollution; it also ensures uniform heat radiation distribution by setting up [a specific feature] in the combustion zone. The heat reflector, lined with ceramic fiber material, prevents heat loss caused by open combustion, ensuring uniform heat radiation distribution on the surface of the sample being tested. This improves the repeatability and reliability of experimental data. Without the heat reflector, the surface temperature difference of the battery pack is >220℃, but with it, it can be reduced to below 45℃. It also features comprehensive exhaust gas treatment; the top opening of the heat reflector connects to an exhaust gas collection device that collects exhaust gases and particulate matter generated during combustion, meeting environmental protection requirements and reducing harmful gas emissions. Furthermore, it incorporates integrated safety protection; by placing the heat reflector in the combustion zone, it effectively prevents the outward spread of flame and explosion energy, protecting the safety of operators and the surrounding environment. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the external fire test device for the power battery system described in this utility model. Figure 1 ;

[0058] Figure 2 This is a schematic diagram of the external fire test device for the power battery system described in this utility model. Figure 2 ;

[0059] Figure 3 This is a side view of the external fire test device for the power battery system described in this utility model;

[0060] Figure 4 This is a top view of the external fire test device for the power battery system described in this utility model;

[0061] Figure 5 This is a bottom view of the external fire test device for the power battery system described in this utility model;

[0062] Figure 6 This is a structural diagram of the external fire test device for the power battery system described in this utility model;

[0063] In the picture:

[0064] Main frame 1, oil pan assembly 2, fuel pan 21, fuel box 211, igniter 22, waste liquid collection device 3, refractory brick 4, sample combustion rack 5, heat reflector 6, waste gas collection device 7, traction device 8, control cabinet 9, flame temperature sensor 10, closed-loop servo system 11. Detailed Implementation

[0065] The following is in conjunction with the appendix Figures 1-6 The present invention will be further illustrated by Examples 1 and 2.

[0066] Example 1

[0067] like Figures 1-6 As shown, the external fire test device for the power battery system of this utility model includes a main frame 1, an oil pan assembly 2, a waste liquid collection device 3, refractory bricks 4, a sample combustion rack 5, a heat reflector 6, a waste gas collection device 7, a traction device 8, and a control cabinet 9.

[0068] Specifically:

[0069] Main Frame 1: The main frame 1 is welded from 304 stainless steel square tubing, and its interior is lined with 5mm thick basalt fireproof cotton as a heat insulation layer. The main frame 1 provides the basic support structure for the entire testing device. Other components are installed inside this frame or connected to the frame, serving to support and protect the internal components.

[0070] Oil pan assembly 2:

[0071] Fuel tray 21: A gasoline tray consisting of multiple independent square fuel boxes 211 (gasoline boxes), each measuring 100-200mm in size and height. Through holes are provided at approximately 2 / 3 of the side of each fuel box 211, connecting to the waste liquid collection device 7 below. During the experiment, the required number of fuel boxes 211 can be selectively ignited according to the size of the sample to be tested, thereby precisely controlling the combustion range and avoiding unnecessary energy waste. The position of the fuel tray 21 can be controlled by the control cabinet 9 to move the traction device 8 back and forth. Its adjustable distance from the sample combustion rack 5 is 300-800mm, and this adjustable design can meet the testing requirements of different standards such as UL2580 and ECE R100.

[0072] Igniter 22: This piezoelectric igniter is located above the fuel pan 21 and is controlled by the control cabinet 9 to ignite the fuel (gasoline) in the fuel pan 21. It works closely with the fuel pan 21 and is a key component for starting the combustion process.

[0073] Waste liquid collection device 3: Located at the bottom of the main frame 1, it is connected to the bottom of the fuel pan 21 and is used to collect residual unburned fuel in the fuel pan 21 to prevent fuel spillage and fire hazards, and reduce environmental pollution. It is connected to the fuel pan 21 through a through hole on the side of the fuel box 211 to achieve the fuel collection function.

[0074] Refractory brick 4: Located on top of fuel pan 21, it can be moved back and forth by traction device 8 controlled by control cabinet 9. During the experiment, refractory brick 4 can be moved to a specific position according to the test requirements to adjust the flame and heat radiation. For example, during the test, refractory brick 4 can be moved below sample combustion rack 5 to change the test conditions.

[0075] Sample combustion rack 5: Located above the refractory brick 4, it can be moved back and forth by the traction device 8 controlled by the control cabinet 9. At the start of the experiment, the sample combustion rack 5 is placed inside the heat reflector 6 to hold the power battery system sample to be tested. It has a clear positional relationship with the refractory brick 4 and the heat reflector 6 in the vertical direction to ensure that the sample is in a suitable testing environment.

[0076] Heat reflector 6: Located in the combustion zone of the battery system, it measures 3500mm × 2500mm with a height of 800 ± 50mm, and its inner lining is made of ceramic fiber material. The thermal conductivity of ceramic fiber material is 0.08~0.12W / (m·K), it can withstand long-term temperatures up to 1260℃ and short-term temperatures up to 1430℃, exhibiting good thermal stability and a porosity of 80%. Heat reflector 6 prevents heat loss due to open combustion, ensuring uniform heat radiation distribution on the surface of the sample being tested, thus improving the repeatability and reliability of experimental data. Before the heat reflector 6 is activated, the surface temperature difference of the battery pack is >220℃; after activation, it can be reduced to below 45℃.

[0077] Exhaust gas collection device 7: Located at the opening on the top of the heat reflector 6, it collects exhaust gas and particulate matter generated during combustion, meeting environmental protection requirements and reducing the emission of harmful gases. It is directly connected to the heat reflector 6, and the exhaust gas is collected through the opening on the top of the heat reflector 6.

[0078] Traction device 8: includes traction device A, traction device B, and traction device C. Traction device A, traction device B, and traction device C are respectively connected to oil pan assembly 2, refractory brick 4, and sample combustion rack 5. Control cabinet 9 is electrically connected to traction device A, traction device B, and traction device C, respectively, and is used to traction oil pan assembly 2, refractory brick 4, and sample combustion rack 5 to move forward and backward inside the main frame 1.

[0079] Control cabinet 9 is the core of the entire testing device, employing an industrial-grade PLC (model: Siemens S7-1500) and a 10.1-inch touchscreen HMI. Control cabinet 9 is connected via wiring to components such as igniter 22, traction device A corresponding to fuel pan 21, traction device B corresponding to refractory brick 4, and traction device C corresponding to sample combustion rack 5, thereby controlling these components.

[0080] Example 2

[0081] like Figures 1-6 As shown, based on the structural foundation of Embodiment 1 above, the external fire test device for the power battery system of this utility model also includes automated control components and remote control components.

[0082] Specifically:

[0083] Components related to automation control:

[0084] Flame temperature sensor 10: It adopts a K-type thermocouple to collect the flame temperature of the fuel pan 21 in real time. The sampling frequency is 10Hz. The collected temperature data is transmitted to the control cabinet 9 to provide data support for the adaptive PID temperature control algorithm of the control cabinet 9. It is usually installed near the flame to accurately measure the flame temperature.

[0085] Closed-loop servo system 11: Used to control traction device 8, realizing multi-axis coordinated motion control with a positioning accuracy of ±0.5mm. It is connected to control cabinet 9 and traction device 8 respectively, receiving commands from control cabinet 9 and driving each traction device 8 to move accurately.

[0086] Remote control related components

[0087] 4G / 5G module: Connected to control cabinet 9, used to transmit real-time data such as temperature, location, alarm status, etc. to remote monitoring terminals.

[0088] Application software: Running on the remote monitoring terminal, it supports OPC UA + MQTT dual protocols, enabling remote monitoring and remote forced emergency stop functions with a response time of ≤200ms. It communicates with 4G / 5G modules via the network to achieve remote operation and monitoring of the entire testing device.

[0089] like Figures 1-6 As shown, based on the structure of Embodiment 1 or Embodiment 2, the test method of the external fire test device for the power battery system described in this utility model is as follows:

[0090] 1. Turn on the external equipment and connect it to the exhaust pipe. 7.

[0091] 2. The igniter 2 is operated by the control cabinet 9 to ignite the fuel in the fuel pan 21 and preheat for 60 seconds to bring the flame temperature to 800 ± 50℃.

[0092] 3. The traction device A, operated by the control cabinet 9, moves the fuel plate 21 to the sample combustion rack 5. The sample combustion rack 5 is usually 50cm above the fuel liquid surface.

[0093] 4. The test subject was exposed to flame for 70 seconds.

[0094] 5. Move the refractory brick 4 under the control of the traction device B in the control cabinet 9 to the sample combustion rack 5 and test for 60 seconds; or, with the consent of both parties, continue to expose it directly to the flame for 60 seconds.

[0095] 6. Control cabinet 9 operates traction device A to remove fuel pan 21 and observes the sample to be tested for 2 hours.

[0096] During the testing process, its automated control is as follows:

[0097] Control cabinet 9 enables centralized control and operation of the entire testing device. The control algorithms include: 1. Adaptive PID temperature control: Real-time acquisition of flame temperature via flame temperature sensor 10 K-type thermocouple, adjusting fuel supply control accuracy to ±15℃ to ensure flame temperature stability within a suitable range; 2. Multi-axis cooperative motion control: A closed-loop servo system 11 controls the traction device 8 with positioning accuracy ±0.5mm, ensuring precise movement of components such as oil pan assembly 2, refractory bricks 4, and sample combustion rack 5.

[0098] Remote control functions: 1. Communication protocol: Supports OPC UA + MQTT dual protocols for convenient communication and data exchange with other systems. 2. Remote monitoring: Transmits real-time data via 4G / 5G module, allowing operators to remotely monitor the experimental status in real time. 3. Application software: Enables remote forced emergency stop with a response time ≤ 200ms, ensuring timely cessation of experiments in emergency situations and guaranteeing safety.

[0099] In summary, the power battery system external fire test device described in this utility model consists of various components that work together to form a complete, efficient, safe, and environmentally friendly test system. Under the unified control of the control cabinet, all components work together to complete the external fire test task of the power battery system.

[0100] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A test apparatus for external fire testing of a power battery system, characterized in that, include: Main framework (1); Oil pan assembly (2), wherein the oil pan assembly (2) is disposed inside the main frame (1); Waste liquid collection device (3) is installed inside the main frame (1). The waste liquid collection device (3) is located below the oil pan assembly (2) and is connected to the bottom of the oil pan assembly (2). Refractory brick (4), the refractory brick (4) is disposed inside the main frame (1) and above the oil pan assembly (2); The sample combustion rack (5) is set inside the main frame (1) and above the refractory bricks (4); A heat reflector (6) is disposed above the main frame (1) and fixedly connected to the main frame (1); Waste gas collection device (7) is located above the heat reflector (6) and connected to the top of the heat reflector (6).

2. The external fire test apparatus for a power battery system according to claim 1, characterized in that, The main frame (1) is welded from metal square tubes. The main frame (1) has an internal heat insulation layer made of fireproof material. The metal square tubes include 304 stainless steel square tubes. The thickness of the heat insulation layer is 1~10mm. The fireproof material includes basalt fireproof cotton.

3. The external fire test apparatus for a power battery system according to claim 1, characterized in that, The oil pan assembly (2) includes a fuel pan (21) and an igniter (22). The igniter (22) is disposed on the fuel pan (21) and is used to ignite the fuel in the fuel pan (21). The fuel pan (21) includes several independent fuel boxes (211). Each fuel box (211) has a through hole on its side and the through hole is connected to a waste liquid collection device (3) located at the bottom of the oil pan assembly (2). The fuel box (211) has a square shape and its size ranges from 100 to 200 mm in length and width and from 100 to 200 mm in height.

4. The external fire test apparatus for a power battery system according to claim 1, characterized in that, The heat reflector (6) is provided with an inner lining made of heat-insulating material; the top of the heat reflector (6) is provided with an opening, and the heat reflector (6) is connected to the exhaust gas collection device (7) through the opening.

5. The external fire test apparatus for a power battery system according to claim 4, characterized in that, The dimensions of the heat reflector (6) range from 3000 to 4000 mm in length, 2000 to 3000 mm in width, and 750 to 850 mm in height; the heat insulation material is ceramic fiber material with a thermal conductivity of 0.05 to 0.15 W / (m·K), a long-term temperature resistance of 1200 to 1300℃, a short-term temperature resistance of 1400 to 1450℃, and a porosity of 75 to 85%.

6. The external fire test apparatus for a power battery system according to claim 3, characterized in that, Also includes: The traction device (8) is located on the side of the main frame (1). The traction device (8) includes traction device A, traction device B, and traction device C. The traction device A, traction device B, and traction device C are respectively connected to the oil pan assembly (2), refractory brick (4), and sample combustion rack (5) to pull the oil pan assembly (2), refractory brick (4), and sample combustion rack (5) to move forward and backward inside the main frame (1).

7. The external fire test apparatus for a power battery system according to claim 6, characterized in that, Also includes: Control cabinet (9), the control cabinet (9) is located on one side of the main frame (1); The control cabinet (9) is electrically connected to traction device A, traction device B and traction device C respectively, and is used to control traction device A, traction device B and traction device C respectively.

8. The external fire test apparatus for a power battery system according to claim 7, characterized in that, The oil pan assembly (2) is controlled by the control cabinet (9) to move the traction device A within the main frame (1), and the distance between it and the sample combustion rack (5) is adjustable from 200 to 900 mm; the control cabinet (9) is electrically connected to the igniter (22) and is used to control the igniter (22) to perform ignition operation.

9. The external fire test apparatus for a power battery system according to claim 7, characterized in that, Also includes: Flame temperature sensor (10), the flame temperature sensor (10) is set on one side of the oil pan assembly (2) for real-time acquisition of flame temperature, the flame temperature sensor (10) is connected to the control cabinet (9) for communication; closed-loop servo system (11), the closed-loop servo system (11) is connected to the traction device (8) and the control cabinet (9) respectively, for receiving the instructions of the control cabinet (9) and driving the traction device (8) to move accurately.

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