Fireproof high-temperature-resistant testing device

Abstract

The utility model discloses a fireproof high-temperature-resistant testing device, which comprises a heating pedestal and a cover plate covering the top surface of the heating pedestal, a heating module is arranged in the heating pedestal, and the heating working surface of the heating module is positioned on the top surface of the heating pedestal; a sample opening corresponding to the heating working surface of the heating module is formed in the cover plate in a penetrating manner; the heating module is electrically connected with a lead-out rod extending out of the side part of the heating pedestal, a heating element of the heating module is formed by arranging a plurality of electric heating unit rods, and the electric heating unit rods are one or more of a carbon fiber heating wire, a high-temperature electric furnace wire and a molybdenum disilicide electric heating rod. According to the utility model, the single side of the civil aviation lithium battery-containing product transportation protection material to be tested can be subjected to high temperature resistance or / and fireproof protection test operation, so that the civil aviation transportation protection material of the lithium battery and the lithium battery-containing equipment can be effectively tested, and the safety test and safety management and control capability of civil aviation flammable dangerous goods can be improved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection testing for transportation protective equipment of civil aviation lithium battery products, and in particular to a fire-resistant and high-temperature resistance testing device (static thermal strength test) that can achieve unilateral high-temperature heating. Background Technology

[0002] Lithium-ion batteries, with their high energy density and compact size, are widely used in electronic products and electric vehicles. In civil aviation, lithium-ion batteries are also transported, for example, in the transport of power banks and mobile phone batteries. Lithium-ion batteries contain active lithium, which, under conditions of overheating, overcharging, or impact, can easily cause smoke, combustion, or even explosions. Lithium-ion battery fires and explosions are frequent, posing serious safety hazards, especially in air transport. Considering the long-duration high-altitude flight environment, protective equipment for transporting lithium-ion batteries needs to handle complex emergency situations. When a lithium-ion battery explodes, the flame temperature can reach nearly 1000℃, exacerbating the complexity of safety issues. To fully verify the fire resistance of transport protective products, static thermal strength testing is required to assess their ability to withstand static high temperatures on their internal surfaces. Currently, commonly used flat-plate heaters typically use ceramic or aluminum materials as the heating surface, with a maximum temperature generally not exceeding 750℃. When high-temperature heating above 1000℃ is required, a closed high-temperature electric furnace is usually used to keep the entire material within the target temperature environment. High-temperature electric furnaces typically use alloy resistance wires as heating elements. Although they can meet heating requirements above 1000℃, they are slow to heat, uneven to heat, and have significant energy loss.

[0003] Existing heating equipment generally cannot simultaneously meet the requirements of high temperature, long-term stable heating, and unilateral heating. There is an urgent need for a high-temperature flat plate heating device that can achieve rapid and uniform heating and long-term stable unilateral heating. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems pointed out in the background art and to provide a fire-resistant and high-temperature resistance testing device for conducting unilateral high-temperature resistance tests on protective materials for lithium batteries and lithium battery-containing equipment in civil aviation transportation, simulating the high-temperature environment when a lithium battery catches fire, and evaluating the fire-resistant and high-temperature resistance performance of the protective materials.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A fire-resistant and high-temperature-resistant testing device includes a heating platform and a cover plate covering the top surface of the heating platform. A heating module is installed inside the heating platform, and the heating working surface of the heating module is located on the top surface of the heating platform. The cover plate has a sample opening corresponding to the heating working surface of the heating module. The heating module is electrically connected to an extender rod extending from the side of the heating platform. The heating element of the heating module is composed of several electric heating unit rods arranged in a row. The electric heating unit rods are one or more of carbon fiber heating wire, high-temperature electric furnace wire, and molybdenum disilicide heating rod.

[0007] To better realize this utility model, the heating working surface of the heating module protrudes from the top surface of the heating platform, and the cover plate has a groove corresponding to the heating working surface of the heating module.

[0008] Preferably, the top surface of the heating platform has a recessed groove, and the heating working surface of the heating module is placed in the recessed groove.

[0009] Preferably, the heating platform has a plurality of mounting grooves corresponding to the electric heating unit rods, and the electric heating unit rods are fitted tightly into the mounting grooves.

[0010] Preferably, the bottom of the recessed groove of the heating platform is a cavity structure, the heating module is installed in the cavity structure of the heating platform, and a heating module housing connected to the bottom of the heating platform is installed outside the heating module.

[0011] Preferably, the outer side of the heating platform and / or the surface of the heating module housing are covered with a thermal insulation layer, which is made of one or more combinations of aluminum silicate fiber, polycrystalline mullite fiber and alumina fiber.

[0012] Preferably, the lead-out rod is coated with ceramic or corundum material.

[0013] Preferably, the electric heating unit rods of the heating module are arranged in parallel and uniform or in a spiral pattern.

[0014] Preferably, the heating platform or cover plate is provided with a temperature sensor for detecting the temperature of the heating module, and the probe of the temperature sensor is close to but does not contact the heating working surface of the heating module; the heating platform is provided with a temperature controller connected to the temperature sensor and the heating module.

[0015] Preferably, the heating platform is composed of ceramic fiber heat-insulating refractory material with a thermal conductivity of less than 0.09 W / m·k, and the bulk density of the heating platform is 250-700 kg / m³.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] This invention places the testable side of the protective material for transporting lithium-ion battery products in civil aviation at the sample port. The required test environment parameters for the testable side are created using carbon fiber heating wire, high-temperature furnace wire, and molybdenum disilicide heating rod. High-temperature resistance and / or fire resistance tests are then conducted on the testable side of the protective material for transporting lithium-ion battery products and related equipment in civil aviation. This professional testing of the fire resistance and temperature resistance of protective equipment for transporting lithium-ion battery products in civil aviation is beneficial for improving the safety management capabilities of civil aviation lithium-ion battery transportation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention after the cover plate is closed on the heating platform;

[0019] Figure 2 for Figure 1 A structural diagram from another perspective;

[0020] Figure 3 This is a schematic diagram of a heating platform structure with heating modules arranged in one embodiment.

[0021] Figure 4 for Figure 3 A schematic diagram of the structure with part of the electric heating unit rod removed;

[0022] Figure 5 for Figure 3 A structural diagram viewed from below.

[0023] The names corresponding to the reference numerals in the attached figures are as follows:

[0024] 1 - Heating platform, 2 - Heating module housing, 3 - Recessed groove, 4 - Cover plate, 41 - Sample port, 5 - Mounting groove, 6 - Heating module, 61 - Electric heating unit rod, 62 - Lead-out rod. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments:

[0026] Example

[0027] like Figures 1-5As shown, a fire-resistant and high-temperature-resistant testing device includes a heating platform 1 and a cover plate 4 covering the top surface of the heating platform 1 (the cover plate 4 can be removed from the top surface of the heating platform 1). A heating module 6 is installed inside the heating platform 1. The heating module 6 is designed as an integral component. The heating module 6 is electrically connected to an extension rod 62 extending from the side of the heating platform 1 (the heating module 6 is electrically connected to an external power source through the extension rod 62). The heating element of the heating module 6 (the heating element is the core heating component of the heating module 6) is composed of several electric heating unit rods 61 arranged in a row (preferably, all electric heating unit rods 61 are connected in parallel or in series to form an integral circuit). The electric heating unit rod 61 is one or more of carbon fiber heating wire, high-temperature electric furnace wire, and molybdenum disilicide heating rod. In actual manufacturing, all electric heating unit rods 61 are selected from a combination of carbon fiber heating wire, high-temperature electric furnace wire, and molybdenum disilicide heating rod (that is, carbon fiber heating wire, high-temperature electric furnace wire, and molybdenum disilicide heating rod are installed according to actual needs). The high-temperature electric furnace wire includes iron-chromium-aluminum alloy or nickel-chromium alloy electric furnace wire. The carbon fiber heating wire can absorb heat energy from the surrounding environment and radiate it in a far-infrared manner. It has a long service life and will not deform or break due to excessive temperature, achieving a long-term heating effect. The high-temperature electric furnace wire and molybdenum disilicide heating rod and other heating elements can efficiently convert electrical energy into heat energy. In some embodiments, the electric heating unit rods 61 of the heating module 6 are arranged in parallel and uniformly (i.e., the heating module 6 is composed of multiple electric heating unit rods 61 arranged in parallel and uniformly connected in parallel or series) or in a spiral arrangement (i.e., the heating module 6 includes one electric heating unit rod 61 designed in a spiral shape; or the heating module 6 includes multiple electric heating unit rods 61, all of which are arranged in series in a spiral shape). The heating element of the heating module 6 heats one side of the protective material for transporting civil aviation lithium battery products under test, and reduces heat loss during heat conduction, enabling it to quickly reach and stabilize at the temperature required for the protective material for transporting civil aviation lithium battery products under test.

[0028] (The protective materials for civil aviation transportation of lithium batteries and equipment containing lithium batteries to be tested include lithium battery onboard emergency response boxes, lithium battery transport protective boxes, fireproof and flame-retardant bags, emergency fireproof covers, fire-resistant containers, etc., and the temperature needs to reach above 800-1000℃).

[0029] The heating working surface of the heating module 6 (the heating working surface is the heating surface of the heating element composed of electric heating unit rods 61, such as...) Figure 3 As shown, the heating working surface is the top surface of heating module 6, located on the top surface of heating platform 1 (e.g., Figure 3As shown, the heating working surface adopts top surface heating, which corresponds to the top surface of the heating platform 1. The cover plate 4 has a through-hole sample port 41 corresponding to the heating working surface of the heating module 6 (the heating heat from the heating working surface of the heating module 6 is collected at the sample port 41 and used to conduct targeted heating and high temperature resistance testing on one side of the protective material for transporting civil aviation lithium battery products to be tested; the sample port 41 is set according to the size of the sample of the protective material for transporting civil aviation lithium battery products to be tested), and the top surface of the heating platform 1 has a heat outlet corresponding to the sample port 41 (a heat cavity is formed at the position of the heat outlet).

[0030] This utility model provides a first arrangement structure for the heating module 6: the heating working surface of the heating module 6 protrudes from the top surface of the heating platform 1 (i.e., a boss is formed on the top surface of the heating platform 1), and the cover plate 4 has a groove corresponding to the heating working surface of the heating module 6 (the groove and the boss correspond to each other, allowing the cover plate 4 and the heating platform 1 to fit together better, and allowing the heating working surface of the heating module 6 to be closer to the sample port 41 for targeted unilateral high-temperature resistance testing of protective materials for civil aviation lithium battery products). Preferably, the recessed groove 3 of the heating platform 1 has several mounting grooves 5 corresponding to the electric heating unit rods 61, and the electric heating unit rods 61 are tightly fitted into the mounting grooves 5. In some embodiments, the heating module 6 and the heating module housing 2 can be designed as an independent integral part, which is assembled with the heating platform 1. In this case, the recessed groove 3 is set on the independent integral part, and the heating module 6 (including all electric heating unit rods 61), the heating module housing 2, the mounting grooves 5, and the lead-out rods 62 form an integrated part.

[0031] This utility model provides a second structural scheme for the heating module 6: the top surface of the heating platform 1 is recessed with a groove 3, the heating working surface of the heating module 6 is placed in the groove 3, and the heating module 6 has a heating module shell 2 on the outside. Figure 5 As shown, the heating module 6 and the heating module housing 2 can be installed from the bottom of the heating platform 1. The recessed groove 3 and the sample port 41 will form a large heat cavity, making the high temperature environment temperature more stable.

[0032] In some embodiments, the bottom of the recessed groove 3 of the heating platform 1 is a hollow structure. The heating module 6 is installed in the hollow structure of the heating platform 1. A heating module housing 2 connected to the bottom of the heating platform 1 is installed outside the heating module 6. The heating module 6 is assembled in the heating module housing 2, and the heating module housing 2 is correspondingly installed in the hollow structure of the heating platform 1 and fixed by connecting bolts. The outer side of the heating platform 1 and / or the surface of the heating module housing 2 are covered with a thermal insulation layer. The thermal insulation layer is made of one or more combinations of aluminum silicate fiber, polycrystalline mullite fiber, and alumina fiber. Preferably, the thermal insulation layer can be an integrally formed hollow structure that can completely expose the heating module 6, so that the heat generated by the heating module 6 can be efficiently transferred inside the heating platform, reducing energy waste, ensuring heating speed, and preventing excessive heat loss due to the exposed heating surface. In addition, it can effectively protect the exterior of the equipment and prevent the outer shell from overheating after long-term operation.

[0033] In some embodiments, the lead-out rod 62 is externally coated with ceramic or corundum material, providing excellent insulation performance and ensuring the safety of heating tests. The heating platform 1 is composed of ceramic fiber heat-insulating refractory material with a thermal conductivity of less than 0.09 W / m·k, exhibiting good heat insulation effect and high-temperature resistance. The heating platform 1 has a density of 250–700 kg / m³. While ensuring sufficient strength and high-temperature resistance, the entire heating platform is lightweight, easy to transport and install, and can be flexibly assembled in different working environments.

[0034] In some embodiments, the heating platform 1 or cover plate 4 is provided with a temperature sensor for detecting the temperature of the heating module 6 (for example, the temperature sensor is embedded in the lower surface of the cover plate 4 and detects the high-temperature environment temperature created by the heating module 6 for monitoring and recording the heating temperature). The probe of the temperature sensor is close to but does not contact the heating working surface of the heating module 6. The heating platform 1 is provided with a temperature controller connected to the temperature sensor and the heating module 6. The temperature controller can be equipped with a button for adjusting the temperature. In some embodiments, the temperature controller can also be set with a preset temperature curve (which can adjust the heating rate as needed at different experimental stages) and combined with the temperature sensor (which can be a high-precision thermocouple or infrared temperature measurement technology) to achieve precise temperature control (avoiding excessively high or low temperatures) while ensuring stable temperature control and minimizing temperature fluctuations during the test experiment.

[0035] In use, the side of the protective material to be tested for transporting lithium-ion battery-containing products in civil aviation is placed at the sample port 41. An external power source is connected via the lead-out rod 62. The heating element of the heating module is activated, and the carbon fiber heating wire, high-temperature heating wire, and molybdenum disilicide heating rod create the required one-sided testing environment parameters for the protective material. A one-sided high-temperature resistance test is then conducted on the lithium battery and the protective material for civil aviation transport of lithium-ion battery-containing equipment, simulating the high-temperature environment during a lithium battery fire to evaluate the fire resistance and temperature resistance performance of the protective material. The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fire-resistant and high-temperature resistance testing device, characterized in that: The device includes a heating platform and a cover plate that covers the top surface of the heating platform. A heating module is installed inside the heating platform, and the heating working surface of the heating module is located on the top surface of the heating platform. The cover plate has a sample opening that corresponds to the heating working surface of the heating module. The heating module is electrically connected to an extender rod that extends from the side of the heating platform. The heating element of the heating module is composed of several electric heating unit rods arranged in a row. The electric heating unit rods are one or more of carbon fiber heating wire, high-temperature electric furnace wire, and molybdenum disilicide heating rod.

2. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The heating working surface of the heating module protrudes from the top surface of the heating platform, and the cover plate has a groove corresponding to the heating working surface of the heating module.

3. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The top surface of the heating platform has a recessed groove, and the heating working surface of the heating module is placed in the recessed groove.

4. The fire resistance and high temperature resistance testing device according to claim 3, characterized in that: The heating platform has several mounting grooves corresponding to the electric heating unit rods, and the electric heating unit rods are fitted tightly into the mounting grooves.

5. The fire resistance and high temperature resistance testing device according to claim 3, characterized in that: The bottom of the recessed groove of the heating platform is a cavity structure. The heating module is installed in the cavity structure of the heating platform, and a heating module shell connected to the bottom of the heating platform is installed on the outside of the heating module.

6. The fire resistance and high temperature resistance testing device according to claim 5, characterized in that: The outer side of the heating platform and / or the surface of the heating module housing are covered with a thermal insulation layer, which is made of one or more combinations of aluminum silicate fiber, polycrystalline mullite fiber and alumina fiber materials.

7. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The lead-out rod is made of ceramic or corundum material.

8. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The electric heating unit rods of the heating module are arranged in parallel and uniform or in a spiral pattern.

9. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The heating platform or cover plate is equipped with a temperature sensor for detecting the temperature of the heating module. The probe of the temperature sensor is close to but does not contact the heating working surface of the heating module. The heating platform is equipped with a temperature controller connected to the temperature sensor and the heating module.

10. The fire resistance and high temperature resistance testing device according to claim 1, characterized in that: The heating platform is composed of ceramic fiber heat-insulating refractory material with a thermal conductivity of less than 0.09 W / m·k, and the bulk density of the heating platform is 250-700 kg / m³.

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