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GB/T 47613-2026Test method for the thermal protective performance of insulation sheets (English PDF)

隔热片热防护性能试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 25, 2026

Implementation date

December 1, 2026

Scope

GB/T 47613-2026 is the English-translated version of 隔热片热防护性能试验方法.

GB/T 47613-2026 is the Chinese national standard covering how an insulating sheet performs against a heat source - the temperature reached on the protected side over time, which is the measurement that matters for the barriers between battery cells and behind exhaust systems. First edition, in force from 1 December 2026. It was issued on 25 May 2026 and takes effect on 1 December 2026, as a first edition. The document is under the responsibility of the China Building Materials Federation. This page is published from the official record of the 2026 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

Document preview — GB/T 47613-2026

National Standard of the People's Republic of China

ICS: 91.100.60
Classification: Q 25

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

5 Experimental Apparatus
5.3 Cold plate and temperature measuring device Cold-rolled steel plate uses
8 Test Procedure
8.3 Experiment
9 Representation of Results

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Thermal Insulation Materials (SAC/TC191). This document was drafted by: Nanjing Glass Fiber Research & Design Institute Co., Ltd., Guangzhou Huineng New Materials Co., Ltd., and Guangdong Elisen Technology. Joint-stock company, Aerospace Haiying (Zhenjiang) Special Materials Co., Ltd., BYD Lithium Battery Co., Ltd. Kengzi Branch, China Automotive Technology and Research Center New Energy Automotive Inspection Center (Tianjin) Co., Ltd., Sunwoda Power Technology Co., Ltd., and Gongyi Panrui Yihui Composite Materials Co., Ltd. Company, Nanjing Gaote Electronic Technology Co., Ltd., Hubei Xingrui Silicon Materials Co., Ltd., Henan Aibiaihe New Materials Co., Ltd., Zhejiang Yantani Science & Technology Co., Ltd. Technology Co., Ltd., Jiangsu Jiayun New Materials Co., Ltd., Zhongke Runzi (Chongqing) Energy Saving Technology Co., Ltd., Dongguan Sixiang Insulation Materials Co., Ltd. The company, Shenzhen Zhongning Technology Co., Ltd., China Coal Research Institute Co., Ltd., Hubei Xiangyuan New Material Technology Co., Ltd., and Jiangsu Hanxin. Tiancheng New Materials Co., Ltd., Ningbo Shengrun New Materials Co., Ltd., Jiangsu Yuanning New Materials Co., Ltd., and Zhonghua Hualu New Materials Co., Ltd. Company, Hubei University of Science and Technology, Shanghai Bohe Refractory Materials Co., Ltd., Sichuan Linglinghao Technology Co., Ltd., and Taistek (Suzhou) Testing Instruments Department Technology Co., Ltd., Good Electric Systems (Suzhou) Co., Ltd., Hunan Ronglan Composite Materials Co., Ltd., Luoyang Sanhe New Materials Technology Co., Ltd. Technology Co., Ltd., South China University of Technology, Winwin Energy Saving Group Co., Ltd., Wuqi Innovation Technology (Chongqing) Co., Ltd., Suzhou Uni Ke Insulation Technology Co., Ltd., Nanjing Vocational University of Technology, Starry Boy (Hangzhou) Technology Co., Ltd., Nanjing Sinoma Standard Certification Co., Ltd. company. The main drafters of this document are. Cui Jun, Wang Jiaqing, Hua Huangwei, Yuan Bing, Zhang Senshen, Yuan Jiangtao, Ma Xiaole, Wang Rui, Zhao Jueyue, Wu Bing, and Cui Henglu. Liu Shiqiang, Zhang Jicheng, Bi Shiming, Yang Hao, Zhao Keren, Teng Kaiming, Bai Yuanyu, Wang Xiaoyong, Peng Zhanjun, Gao Tao, Zhang Biao, Liao Qingping, Jin Chengli Ma Guanxiang, Huang Kuntao, Yin Sijie, Luo Kaiyan, Zhao Zhongdan, Niu Yongming, Yang Bin, Chen Guangliang, Chen Yong, Xie Cunjian, Feng Changchuan, Zhao Jingjing, Xu Tengzhou Xu Xiran, Wei Ronghui, Dan Liangfeng, Yao Jiaqin, Yin Longpan, Wen Yuliang, Li Yansong, Duan Jianping, Yang Lifen, Qing Yuquan, Liu Kun, Zhu Zheng, Meng Hao. Test method for thermal protection performance of thermal insulation sheet

1.Scope This document specifies the principles, test apparatus, test specimens, and test conditions for testing the thermal protection performance of heat insulation sheets under the condition of thermal runaway in individual battery cells. Test conditions, test procedures, expression of results, and test report. This document applies to power systems using nanoporous aerogels, nanoporous materials, vacuum insulation panels, foam, or ceramic fiber paper as raw materials. Testing of the thermal protection performance of battery heat shields. Other types of heat shields can be used as a reference.

4.Principles The process of thermal protection of the heat shield under the condition of thermal runaway of a single battery cell is simulated. A hot plate is heated to a specified temperature, and a cold plate is moved upwards to contact the test... The component is brought into contact with a hot plate and subjected to a certain pressure. Under conditions where the hot plate temperature is constant (Method A) or the hot plate temperature is decreasing (Method B), the cold temperature is recorded. The plate temperature rise curve is used to characterize the thermal protection performance of the insulation sheet by the temperature of the cold plate at a certain time point (Method A) or the highest temperature (Method B).

5 Experimental Apparatus

5.1 Overview A typical design of the thermal protection performance test device for thermal insulation sheets is shown in Figure 1. The device includes a hot plate and heating device, a cold plate and temperature measuring device, a heat insulation plate and pressure device.

5.2 Hot plate and heating device The schematic diagram of the hot plate and heating device is shown in Figure 2. The hot plate and support are made of 06Cr25Ni20 stainless steel plate, with dimensions of 100mm×100mm×20mm, or other materials similar to the heat insulation sheet. Meets the required dimensions. The refractory bricks are made of ceramic fiber refractory material, with a bulk density of 400kg/m^3~450kg/m^3 and an average temperature conductivity of 500°C. The thermal coefficient is no greater than

0.15 W/(m·K), and the dimensions are shown in Figure 2.A silicon carbide heating element is used; the hot plate can be heated to 1000°C or the target temperature of the hot plate. Temperature is set by the main controller to the desired heating temperature; heating rate is 0°C/min to 8°C/min; heat source temperature control accuracy is 1%. Regular checks are required. Check the aging of the heating device; if the power reduction reaches 10%, the silicon carbide rod should be replaced. Thermocouples shall comply with the provisions of 5.6.Thermocouples shall be embedded in the hot plate, and three thermocouple temperature sensors shall be connected in parallel for measurement. The setup is shown in Figure

2.The effective average value of the three thermocouples is used as the control parameter. The working surface should be machined to a flat surface with a flatness of

0.2 mm. The surface flatness and cleanliness should be checked regularly.

5.3 Cold plate and temperature measuring device Cold-rolled steel plate uses

3.The results are based on the effective average value of the three thermocouples. The working surface should be machined to a flat surface with a flatness of

0.2 mm. The surface flatness and cleanliness should be checked regularly. The unit is millimeters.

5.4 Insulation Board The insulation board is made of calcium silicate board, with dimensions of 120mm×120mm×30mm, or other dimensions compatible with the insulation sheet, and a bulk density of For insulation panels with a capacity of 850 kg/m^3 to 950 kg/m^3 and an average temperature of 300°C, the thermal conductivity should not exceed

0.13 W/(m·K). The insulation panels should be tested beforehand. Drying and cooling treatment. To avoid heat transfer affecting pressure measurements and to improve test efficiency, a circulating thermostatic device should be installed between the heat insulation plate and the pressure load sensor. sink.

5.5 Pressure Control Device Connected to a cold plate, it can provide a 25kN electric actuator and pressure sensor, and should meet the requirements of Class 1 testing machine specified in GB/T 16491.

5.6 Thermocouples Thermocouples should meet the Class 1 accuracy requirements specified in GB/T 16839.1.Type S thermocouples with a wire diameter of 0.3mm~0.5mm should be used. Type K thermocouples should have their thermal contacts insulated and not grounded.

5.7 Steel ruler The graduation value is 1 mm.

5.8 Vernier calipers The graduation value is no greater than

0.02 mm.

6 test specimens

6.1 Specimen Dimensions Tests should be conducted based on the actual number of layers and condition of the specimens, and all skins, veneers, and/or coatings should be retained during specimen preparation; if there is a border, It should be removed. The test specimen measures 100mm x 100mm, with the original thickness retained. For larger insulation sheets, cut them to 100mm x 100mm dimensions. For specimens with a length or width less than 100mm, other specimens should be cut to make up the 100mm diameter. Seams should be as small as possible and should be avoided as much as possible. In the central part. If the preparation of the specimen may affect its thermal protection performance, such as a vacuum insulation panel, then a whole specimen should be used for testing.

6.2 Number of Specimens At least three specimens should be tested.

6.3 Specimen Conditioning The specimens should be placed at (23±5)°C for at least 6 hours.

7.Test conditions The laboratory ambient temperature was (23±5)°C. The equipment should be placed entirely within a fume hood, with the fume hood door kept closed during the test. The equipment should not be subjected to any form of strong force during the test. To mitigate the effects of air convection, the room temperature change during the test should not exceed 5°C.

8 Test Procedure

8.1 Determination of Experimental Parameters The hot plate temperature Th is 600°C, and the test pressure p is 0.9MPa. If there are special requirements, the hot plate temperature Th and test pressure p can also be adjusted. It shall be agreed upon by both the supply and demand parties.

8.2 Pre-test preparation procedures and temperature balancing of hot and cold plates Remove the cold plate from the hot plate. Heat the hot plate to the specified temperature Th. Once the hot plate temperature reaches Th and stabilizes within ±0.75%, remove the cold plate. The insulation board temperature shall be maintained at (23±5)°C for at least 10 minutes. If a longer balancing time is required, it shall be agreed upon by the supplier and the buyer. Removing the cold plate from the hot plate by more than.200mm and placing a certain thickness of insulation material on the cold plate can eliminate the heat loss caused by the hot plate during the balancing process. The impact on heat transfer of the cold plate.

8.3 Experiment

8.3.1 Method A. Hot Plate Thermostat Method Measure and record the thickness of the specimen using calipers. Place the specimen on the cold plate, ensuring it is centered. Move upwards. The test begins when the cold plate contacts the specimen, and the specimen contacts the hot plate, and the temperature curves of the cold and hot plates are continuously recorded. After the test begins, the temperature of the hot plate is controlled to be stable. Set the target temperature Th. After the specimen contacts the hot plate, continuously apply pressure until the test pressure p is reached. The pressurization process should be rapid and smooth, and the time should not exceed [the specified time]. 30 seconds. Maintain the press position after reaching the set pressure. Record the temperature of the cold plate when the test time t is 1200s. The test time t can also be agreed upon by the supplier and the buyer. The test duration should be no less than 30 minutes. After each test, the surface flatness and cleanliness should be checked. If unevenness or sample adhesion is found, [further action should be taken]. Clean it up. After balancing the equipment temperature according to the requirements of 8.2, continue the test of the next specimen.

8.3.2 Method B. Hot Plate Cooling Method Measure and record the thickness of the specimen using calipers. Place the specimen on the cold plate, ensuring it is centered. Move upwards. The test begins when the cold plate contacts the specimen, and the specimen contacts the hot plate, and the temperature curves of the cold and hot plates are continuously recorded. After the test begins, the heating power of the hot plate is increased. Reduce to zero. After the specimen contacts the hot plate, continue applying pressure until the test pressure p is reached. The pressurization process should be rapid and smooth, and the time should not exceed 30 seconds. Maintain the press position after setting the pressure. The test should be stopped at least 10 minutes after the cold plate reaches its maximum temperature. After each test, the surface flatness and cleanliness should be checked. If there is any unevenness or sample sticking, it should be cleaned. After balancing the equipment temperature according to the requirements of 8.2, continue the test of the next specimen. Note

1.The results of method A and method B are not comparable. Note

2.Replacing the cold plate and heat insulation plate, and installing a circulating constant temperature water bath can improve the efficiency of the test.

9 Representation of Results

9.1 Method A. Hot Plate Thermostat Method The thermal protection performance of the insulation sheet is expressed as the cold plate temperature TA,t(Th) at time t after the start of the test, and the median of all results is taken as the final value. As a result, it was rounded down to 1°C.

9.2 Method B. Hot Plate Cooling Method The thermal protection performance of the insulation sheet is expressed as the maximum temperature of the cold plate, TB,max(Th). The median of all results is used as the final result, rounded to the nearest integer. 1°C.

10 Test Report The test report should include the following information.

a) Instructions for testing according to this document.

b) Product identification. 1) Product name, manufacturer, supplier; 2) Product type; 3) Other relevant information, such as nominal dimensions, borders and/or coatings.

c) Test Procedure. 1) Status adjustment; 2) Use method A or method B; 3) Test date; 4) General information related to the test (e.g., hot surface temperature Th, test pressure p).

d) Result. 1) The thickness of the specimen; 2) Report the hot and cold plate temperature change/time curves and the cold plate temperature TA,t(Th) or TB,max(Th) for each specimen; 3) Photos of the samples before and after the test, showing changes in appearance, including color and cracking; 4) Observed abnormalities, such as burning and smoke.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

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