Testing Chambers Knowledge

  In today’s highly competitive market environment and the background of globalization, in order to quickly and successfully occupy the domestic and foreign markets, products must not only meet the performance requirements, but also improve the environmental adaptability and reliability of products. Therefore, environmental test and reliability test comply with the needs of the market and are valued by all walks of life at home and abroad. This paper focuses on the relationship between environmental test and reliability test.   1.Concept and research contents  Environmental test  is an important part of environmental engineering, which plays an important role in the development, production, storage and use of products. It is an important means to ensure the environmental adaptability of products.   Environmental test is the process of applying certain environmental conditions to products according to certain methods and procedures to test the environmental adapt...

  Environmental test is to expose materials or products to artificial or natural environment and evaluate their performance under storage, transportation and various conditions. From these aspects, we can see the correlation between environmental testing and reliability. Environmental test equipment is used to test and verify the reliability of any product in terms of environmental factors, just like taking a ruler with a scale to measure the length of other objects. If the scale is inaccurate, the measured length will not be accurate. Therefore, the reliability of environmental test equipment is particularly important.   1.Reliability overview of  environmental test equipment The reliability of environmental test equipment refers to the ability of environmental test equipment to complete specified functions under specified conditions and within specified time. Environmental test equipment includes electrical equipment and mechanical equipment. The principle of reliabilit...

  With the development of people in the military, aerospace and navigation fields, many equipment will work in the environment of high temperature, low temperature and high humidity. The equipment will face greater challenges in this environment. The stability of the equipment has an important impact on the work of the equipment.   The  high and low temperature humidity test chamber   (hereinafter referred to as the high and low temperature humidity chamber) is used to inspect the performance of materials in aerospace and navigation products under high temperature, damp heat and other environments. Its structure and working principle have certain particularity.   1.Use of  high and low temperature humidity chamber Before the environmental experiment, it is necessary to master the performance of the tested sample, the experimental procedure, the experimental conditions, and the experimental technology. At the same time, it is necessary to master the tec...

  Lithium ion battery has the advantages of high specific energy, high specific power, high voltage platform, small self discharge, long cycle life, low environmental pollution and no memory effect. It has been widely used in mobile phones, computers, electric vehicles, military, space technology and other related fields.  However, lithium ion batteries bring some potential safety hazards while bringing benefits to mankind. For example, lithium ion batteries may cause fire, explosion and other hazards under abuse conditions (such as overcharge, over-discharge, short circuit, extrusion, acupuncture, high temperature, etc.). In recent years, accidents related to the safety of lithium ion batteries continue to occur, which poses a great threat to people’s personal and property safety. The safety performance of lithium battery is still an urgent problem to be solved. From the perspective of lithium battery itself, it is the carrier of energy itself, which has unsafe factors. Diffe...

  Control  Temperature and humidity test chambers  include constant test chamber and alternating test chamber.The common high and low temperature test chamber generally refers to the constant high and low temperature test chamber. Its control mode is: set a target temperature   The inspection chamber has the ability to automatically stabilize the temperature to the target temperature point. The control mode of the constant temperature and humidity test chamber is also similar. Set a target temperature and humidity point. The test chamber has the ability to automatically stabilize the temperature to the target temperature and humidity point. The high and low temperature alternating test chamber has a program for setting one or more high and low temperature changes and cycles.   The test chamber has the ability to complete the test process according to the preset curve, and can accurately control the temperature rise and drop rate within the range of the maximum t...

  Short Circuit Test Standard requirements: battery short circuit test includes single short circuit test and module short circuit test. The external short circuit of single battery is 10 min, and the external short circuit resistance is not greater than 5 m Ω; During the short circuit test of the storage battery, there shall be no explosion or fire. Analysis and research of test results: during the short circuit test of single power battery, the external short circuit resistance is 2.7 m Ω, the short circuit current is large, and a large amount of gas is ejected from the safety valve with electrolyte. The module short circuit current is several times of the single short circuit current (100 Ah short circuit current is nearly 4000 A).  The power battery reacts more violently, releasing a large amount of heat that melts the plastic shell of the power battery, causing serious deformation. Combustion often occurs in the process of module short circuit, mainly due to several reaso...