Testing Chambers Knowledge

  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...

  With the increasing number of vehicles in the world, the problems of environmental pollution and lack of responsibility for oil resources are becoming increasingly prominent. Because of its advantages of green environmental protection, diversification of energy sources, and high energy efficiency, all countries in the world are actively working to research and develop electric vehicles that can replace traditional vehicles.  At present, power batteries for electric vehicles include lead-acid batteries, lithium-ion batteries, and zinc air batteries. Among them, lithium-ion battery is the latest high-performance battery researched and commercialized the fastest. It has been widely used in electric vehicle power batteries because of its high voltage, high specific energy and good cycle performance; However, due to its frequent safety accidents in the actual use process, its safety has been paid more and more attention. At present, there are two forms of power batteries. One is ...

  With the vigorous development of the electronic industry, all kinds of electronic products and electric products have gradually become indispensable tools for people to use, and the batteries closely related to them have gradually attracted people’s attention.  Among them, the safety of the battery itself is the focus of attention. A battery with potential safety hazards will become a time bomb around people at any time, endangering people’s lives.  There are many factors affecting the safety of the battery, and the high temperature and high pressure generated in the battery are directly related to the heat generation factors.  There are many heat generating factors. A certain impact test will generate heat inside the battery, and it can also detect the impact resistance of the battery and its subsequent stable state. Therefore, the   heavy impact test   is an important test item in the battery safety detection.   1.Test Standards In the process of b...