In recent years, the automotive logistics industry and the supply and demand market have steadily developed. Overall, the entire industry has entered a period of stable and rapid development. The development of electric vehicles is a national trend, and electric vehicles are widely regarded as the main direction for the transformation and development of future automotive...
Lithium ion power batteries have been widely used in the field of electric vehicles due to their high voltage, high specific energy, and good cycling performance. 1 Test Taking a lithium-ion power battery with a rated capacity of 70Ah for electric vehicles as an example, a room temperature (20 ℃) capacity test and a low temperature (-20 ℃) capacity test were conducte...
The storage of lithium-ion batteries is very common in practice, and they may be stored for a long time during the production and sales cycle of the battery. In practical use, they may also be stored for a long time. During the storage process of lithium-ion batteries, especially in high-temperature environments, the battery system is in a thermodynamic unstable state un...
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...
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 t...
With the popularization of new energy electric vehicles, the safety issues of electric vehicles are receiving increasing attention. Among them, the safety characteristics of lithium batteries are one of the key factors for the safety of electric vehicles. This article takes ternary soft pack lithium batteries as the research object, and through experimental and simulatio...
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...
1.Possible causes of thermal runaway Energy storage batteries generally experience thermal runaway under abuse conditions, and common abuse conditions are divided into three categories: mechanical abuse, electrical abuse, and thermal abuse. The most common occurrence of thermal runaway due to electrical abuse. In abusive working conditions, lithium-ion batteries not onl...
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...
With the popularization of electric vehicles and the continuous expansion of market share, safety issues have also become one of the focuses of consumer attention. Especially the frequent occurrence of electric vehicle spontaneous combustion has attracted widespread attention and discussion in society. The occurrence of these events not only brings concerns to consumers,...
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...
With the rapid development of new energy vehicle industry, the power battery of electric vehicles is prone to Thermal runaway due to its own characteristics and use environment. Thermal runaway will cause thermal damage to the power battery, leading to auto ignition and even explosion. Therefore, it is of great significance to analyze the causes of Thermal runaway of ele...
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 el...
In recent years, electric vehicles have achieved unprecedented development, and countries are actively carrying out related research work. In civilian vehicles, major automobile manufacturers continue to introduce technologically advanced hybrid electric vehicles and pure electric vehicles. On Military vehicle, many countries have also carried out a lot of research work....
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 ...
In recent years, electric vehicles have developed rapidly, and as a key component of electric vehicles, power batteries have also undergone rapid technological development. The performance and service life of power batteries directly determine the performance and cost of electric transmission vehicles. At present, the main power batteries used in electric drive vehicles ...
Environmental conditions are the key factors that affect the quality and reliability of equipment. For equipment used in the environment where the ambient air temperature changes rapidly, the impact of temperature shock environment is a factor that must be considered. This environment brings a variety of typical environmental effects to equipment, such as deformation or ...
Energy and environment are the two fundamental issues facing sustainable development in the world today. Hybrid electric vehicles, as a green and efficient means of transportation, have been increasingly promoted worldwide. With the increasingly mature battery preparation technology, the Lithium iron phosphate power battery, as an important part of the hybrid electric ve...
1.Volume Selection When the tested product (components, components, parts or complete machine) is placed in the climate environment chamber for testing, in order to ensure that the tested product The ambient atmosphere can meet the environmental test conditions specified in the test specifications. The following provisions shall be followed between the working dimension...
During battery use, temperature changes or various impact metal particles pierced the separator between the positive and negative electrodes, causing a short circuit inside the battery and causing a large amount of heat, causing the battery to catch fire. Due to the accidental inclusion of metal particles during the production process, it is difficult to completely prev...
1.Test Overview The impact experienced by the products during use and transportation is mainly due to the impact caused by the emergency braking and impact of vehicles, the air drop and crash of aircraft (emergency landing), the launch of artillery, the explosion of chemical energy and nuclear energy, the ignition separation and re-entry of missiles and high-performance ...
Lithium iron phosphate battery is a very potential lithium-ion battery in the current market. At present, the research on Lithium iron phosphate battery mainly focuses on Battery management system and state of charge estimation. Its performance needs further research, especially its low-temperature performance. At present, the discarded equipment used for Antarctic scien...
When satellites, space probes and other spacecraft are operating in space, they are in a thermal vacuum environment of high vacuum, cold black and solar radiation. Vacuum thermal environment simulation test is a very effective ground test method to simulate the vacuum thermal environment (high vacuum, cold black, solar radiation, high temperature and other environments) ...
With the development of the automobile industry, Alternative fuel vehicle have become a force that cannot be ignored in recent years. With the increasing use of new energy vehicles, we often see news about the spontaneous combustion, explosion and other aspects of new energy vehicles. The essence of new energy vehicle safety accidents is actually battery Thermal runaway....
Lithium batteries are one of the indispensable power sources in today’s aerospace industry, often serving as backup energy for various aircraft equipment startup, communication, and emergency response. They are important components of aerospace vehicles. However, in normal operation, lithium batteries are very sensitive to environmental temperature, and the impact of tem...
1.Low Air Pressure Environment Due to the gravity of the earth, the air has a certain weight to form atmospheric pressure. The atmospheric pressure at a certain height is the heaviest of the entire air column on the unit area perpendicular to the ground above the point. With the increase of height, the air gradually becomes thinner and the atmospheric pressure gradually ...
Continuous charging and discharging during the use of power batteries can have an impact on the battery temperature, and high or low battery temperatures can affect the performance, lifespan, and safety of the battery system. Therefore, the adaptability of lithium-ion batteries to temperature has become one of the key factors restricting their application in electric veh...
1.Overview High and Low Temperature Humidity Test Chamber is a kind of equipment that can be used for the reliability test of lithium batteries, small electronic products, electronic components and materials, or for the climate test of other products. The temperature adjustment range of high and low temperature damp heat laboratory is generally +60 ℃ ~-50 ℃, and the rela...
As is well known, the safety of battery cells and battery packs during use has a significant impact on the safety of users. This project mainly studies the impact of lithium-ion cells and battery packs on users after being punctured by foreign objects. Lithium ion battery is a high-capacity rechargeable battery developed in the 1990s. It can store more energy than nickel...
In the market, the temperature and humidity of this kind of test chamber are constant. Most of them adopt thermal control, that is, the heat of the heater offsets the cold volume of the evaporator to achieve the balance of temperature and humidity. Cold control is that the controller PID calculates the on-off time of the solenoid valve in a unit cycle according to the ac...
Analysis of the current application status of lithium-ion batteries The rapidly developing automobile industry has brought convenience to people, while its exhaust has become the main culprit of urban air pollution. On the other hand, as non renewable energy sources, the consumption of oil and natural gas is gradually increasing and will eventually dry up in the near fu...
In addition to human operation, the environment in which the products are located is also an important reason for their work failure. Among them, temperature, humidity and vibration are the three main environmental factors that have the greatest impact on the product equipment. This paper analyzes the main types and causes of product failure caused by these three environ...
3.3 Test Requirements and Methods (1) During the temperature test, the temperature change speed between each temperature step shall not exceed 20 ℃ /h. During the test, the relevant test can be carried out only after the tested instrument reaches the temperature stable state as far as possible. (2) During the high and low temperature storage test of some instruments, th...
However, the low temperature environment exists in most of its service environments. Therefore, the adaptability of electronic instruments at low temperature is directly related to their quality. Based on this, this paper analyzes the low temperature environmental effects and low temperature test technology related to electronic instruments in detail. 1.Overview of Low ...
Severe external conditions such as electricity, machinery, and heat are important factors that trigger safety issues in lithium-ion batteries, while safety issues such as ignition and explosion in lithium-ion batteries are generally attributed to thermal runaway. For example, overcharging, internal short circuits, etc. can lead to thermal runaway and cause safety issues...
A rapid temperature change rate test chamber is a thermal cycling chamber designed to increase the repeatability of thermal shock testing. Due to the increasing number of issues that affect the reliability of electronic devices, circuit boards, and their reliability, it is necessary to have a better-suited method of evaluating them. Rapid Temperature Change rate Test C...
