Testing Chambers Knowledge

  What are the main aspects of secondary battery performance? Voltage, internal resistance, capacity, internal pressure, self-discharge rate, cycle life, sealing performance, safety performance, storage performance, appearance, etc., others are overcharge, over-discharge, solderability, corrosion resistance, etc. What are the electrical performance indicators of mobile phone battery blocks? There are many electrical performance indexes of the battery block. Only the main electrical characteristics are introduced here: Battery block capacity : This indicator reflects the amount of electrical energy that the battery block can store in milliampere hours, for example, 1600mAH means that the battery can be continuously discharged for one hour at 1600mA. Battery block life : This indicator reflects the number of repeated charge and discharge cycles of the battery block. The internal resistance of the battery block : the smaller the internal resistance of the battery block, the better, bu...

The mobile phone lithium battery is a finished battery composed of battery cell and battery protection board. The mobile phone lithium battery will be activated before leaving the factory. After a series of processes of filling the battery case with electrolyte-sealing-forming-dividing, the activation of the mobile phone lithium battery is completed. The activated mobile phone lithium battery also needs to be functionally tested. The purpose of the test is to verify whether the battery quality is qualified and to prevent the circulation of inferior batteries from the source. The mobile phone lithium battery test mainly uses power, switches, electronic loads, multimeters, and other instruments to test the battery’s over-current and over-voltage, and checks whether the battery protection board can react quickly to protect the battery.In this process, we also need to use the battery test module – high current shrapnel microneedle module, which is mainly used for conducting current and tra...

 Lithium battery, I think we should be more rigorous. It should be called the lithium-ion secondary battery. Li is the smallest diameter and most active metal on the element periodic table. If you are not sure, you can look at the periodic table “Lithium hydrogen-helium beryllium boron, carbon-nitrogen, oxygen, fluorine, and neon…”. Because Li has these characteristics, it is widely favored by smart scientists and engineers. However, this is also a double-edged sword. When lithium metal is exposed to the air, it will violently oxidize with the oxygen in the air and explode. This is also a difficult problem in pre lithium. So in the daily electrode materials, we usually use alloy materials and graphite to store lithium atoms. These materials are like a small storage grid. The lithium atoms lie in it, and the larger oxygen molecules cannot enter. Their reaction will not happen, avoid explosions, and thus achieve safety purposes.   When a lithium-ion battery is charged,...

  What is  IEC 62133 ? The International Electrotechnical Commission (IEC) was established in 1906 and has a history of 114 years until 2020. It is the earliest international electrotechnical standardization Organization established in the world and is responsible for the international standardization work in the fields of electrical engineering and electronic engineering. The purpose of IEC is to promote international cooperation in standardization and related issues in the field of electrical and electronic engineering and to enhance mutual understanding between the world. IEC 62133 is an international standard, and various manufacturers produce according to internationally accepted standards. The IEC 62133 standard is for the safety requirements of cell batteries and battery packs containing alkaline or non-acid electrolytes and portable sealed cell batteries and battery packs.   Which items are mainly tested by IEC 62133? IEC 62133 mainly tests cells and batterie...

  In recent years, electric vehicles have become more and more popular, but electric vehicle accidents have occurred more and more frequently. Therefore, we need to know why the charging of electric vehicles will suddenly catch fire or explode? Line aging Electric vehicles have been used for a long time, and the connection lines in the vehicle are easily aging and  short-circuited . If the wires in the vehicle are short-circuited, and the external temperature is too high, it is easy to burn.   The battery is a short circuit In general, it is easy to attribute the self-ignition of electric vehicles to batteries. Take lead-acid batteries, even if the internal temperature of the battery is high and a large amount of gas is generated, it will be released through the vent hole, so it will not explode easily. Unless the battery has a long service life, the internal circuit is easy to short circuit, causing spontaneous combustion.   Doesn’t match the charger ...

  The simple division of environmental testing can be divided into “climate environmental testing”, “mechanical environmental testing” and “comprehensive environmental testing”. Climate-related environmental tests include environmental stress tests such as temperature,  humidity , and pressure, while mechanical environmental tests include environmental stress tests such as shock and vibration, and comprehensive environmental tests are stress tests that integrate climate and mechanical environmental factors.   Mechanical environmental test: Environmental stress: impact, vibration, collision, acceleration, high noise, high wind Comprehensive Environmental Test: Environmental Stress: Environmental Factors Combining Mechanical Environment and Climate Environment Climate environment test: Environmental stress: temperature and humidity, gas, salt fog, wind and rain, pressure, solar radiation   Of course, tests conducted using environmental test equipment cannot completely ...

 Environmental testing type Environmental chamber testing usually uses a single-factor test and multi-factor combination test, which act on the products in a certain order. To improve the accuracy and reliability of the test results, environmental tests have also begun to develop comprehensive tests, and actively develop large-scale multi-functional environmental test equipment that can simultaneously apply stress such as temperature, humidity, vibration, radiation, sand, wind, and rain. The main types of environmental testing chambers : Climate environmental testing chambers Applicable standards are GB2423, GJB150A, GJB4, IEC60068, GJB1032, GJB322A, GJB360A, GJB548, GB4208, GJB899, TB3021, etc. Temperature test chamber High-temperature test chamber, low-temperature test chamber, temperature impact test chamber, temperature change testing chamber, rapid temperature change testing chamber (temperature change rate up to 15 degrees/min), high temperature aging testing chamber, tempera...