The Importance of Lithium Ion Battery's Environment Test 1. Prevent explosion and other safety accidents caused by misuse of lithium ion batteries. The emergence of lithium-ion batteries has brought great convenience to many electronic manufacturers, especially the widespread use of rechargeable batteries. However, the use of these batteries has also caused many accidents. Part of the reason is that the detection of lithium-ion batteries is not in place. There will be specific temperature reports and appropriate environmental preservation reports for lithium-ion battery testing, from which the correct battery usage can be obtained. For example, a high temperature battery burning test machine is necessary to test battery burning resistance. 2. Extend the service life of lithium ion batteries The lithium-ion battery testing service professionally provided on the market carries out a high degree of simulation testing, which determines the battery life, including the charging current, the storage environment, and the user's use of the battery. Lithium ion battery detection can detect the battery capacity value to remind users to pay attention to its saturation during charging. And also the battery environment testing equipment will help to forecast the battery’s status under different environments. This is about the fact that many manufacturers can effectively prolong the service life of their products. 3. Performance test to clarify the direction of use Lithium ion batteries are used in the production of major electronics and electrical appliances, which can be seen everywhere in life. Companies specialized in lithium-ion battery testing will distinguish the applicable scope of various batteries and answer questions about the use limits. Lithium ion battery is a kind of durable goods. Determining the direction of good use can reduce many unnecessary costs, which is also one of the important aspects of lithium ion battery testing. The importance of lithium-ion battery testing is summarized in the above aspects. Checking the safety problems of lithium-ion batteries can reduce the occurrence of accidents. The detection of lithium-ion batteries also includes the flow and capacity of batteries, which can effectively prolong the service life of electronic products. Another important thing is that lithium-ion batteries have a wide range of use, and the specific range of use can be determined through testing. Acey new energy is a professional supplier of lithium battery testing machines for different use.

Why Should the Battery Pack Have the Aging Test First, in order to make the electrolyte soak better, which is conducive to the stability of the lithium-ion battery pack’s performance. Second, after aging, the active substances in the positive and negative materials can promote the acceleration of some side uses, such as gas production and electrolyte decomposition, so that the electrochemical performance of lithium-ion battery pack can quickly reach stability; The third is to screen the consistency of lithium-ion battery pack after aging for a period of time. After formation, the voltage of the cell is unstable, and its measured value will deviate from the actual value. After aging, the cell voltage and internal resistance are more stable, which is convenient to screen batteries with high consistency. The battery performance after high-temperature aging is more stable. Most lithium-ion battery manufacturers adopt the high-temperature aging operation mode in the production process, aging at 45 ~ 50 ℃ for 1 ~ 3 days, and then put it aside at room temperature. After high-temperature aging, potential adverse phenomena of batteries will be exposed: for example, voltage change, thickness change and internal resistance change are comprehensive indicators that directly test the safety and electrochemical performance of these batteries. Temperature has a great influence on the cycle aging rate of lithium-ion battery pack. At lower temperature, the cycle life is reduced due to strengthened lithium elemental electroplating. Too high temperature shortens the battery life due to the aging reaction of the driver. Therefore, the best cycle life of lithium-ion battery pack can be obtained only at an appropriate temperature. Acey new energy is a professional supplier of lithium battery aging test machine.       

Operational Principle of Lithium Battery Auto Sorting Machine What is the battery cell sorting machine? The battery sorter is usually designed according to international standards. Each communication of the sorter system will have a separate constant current and constant voltage. Generally, it adopts the design structure of module with plug and playback. When sorting, you can delete or load module units without restriction. This function also facilitates some daily maintenance of the system. The 11 channel lithium battery sorter is a test and sorting equipment for the internal resistance, voltage and other parameters of cylindrical batteries. It is equipped with a high-precision automatic test system for internal resistance and voltage. The equipment sends the battery to the specified gear according to the internal resistance and voltage values set on the computer software Working principle of battery cell sorting machine 1. Upper feeding part The manual only needs to put the discharge box at the position of the feeding bin, and then pull out the bottom stop. The feeding is very convenient and there will be no clamping phenomenon. The grooving teeth are driven by the motor and rolled into the battery in turn and transported to the buffer belt. 2. Feeding mechanism The PVC belt is used to transport the battery cell. The discharging method is one port releasing two. The conveyor belts on both sides are transported and tested respectively. The testing is carried out synchronously, and the efficiency is very high. This really improves the efficiency in a battery pack assembly line. 3. Test the conveyor belt pulling mechanism The transfer mechanism is composed of a conveyor belt pulling mechanism and a material retaining mechanism. When testing OCV and sorting the battery cell. There are two sets of OCV test and sorting structures, one on the left and one on the right, so you don't have to worry about shutdown or material jamming. If there are abnormalities on one side, you can continue production on the other side 4. Battery cell suction mechanism When the test is completed, the manipulator goes down to suck the battery cell. The cell suction mechanism adopts magnet suction. Because battery cells can be sucked by electromagnetism, the manipulator goes down to suck 11 cells at one time. 5. Sorting mechanism After the battery cell is sucked up, it is accurately put into each gear by the XY axis screw rod, and then transported out along the sorting belt line. There are 11 sorting belt lines, which represent the battery cell of 11 gears respectively. The discharging of the battery cell is controlled by 11 groups of suction structures. When testing which gear the battery cell is to be placed on which belt line, the battery cell sucked by the cylinder control magnet will fall off on which belt line when the magnet is released, and the surplus belt will flow out Acey new energy is a professional supplier of lithium battery auto sorter. There are 5 chan...

Test Index of Constant Temperature and Humidity Testing Machine The accuracy indexes of parameters of constant temperature and humidity testing machine (such as temperature, humidity, etc.) are the results of detection under no-load state. Some customers might ask: don't the test results under no-load and non-no-load are the same? It must be different. Once the constant temperature and humidity testing machine is placed into the tested product, it will have an impact on the uniformity of environmental parameters in the test chamber. The larger the space occupied by the tested product, the more serious the impact will be. Why? A large number of measured test data show that the temperature difference between the windward side and the leeward side in the flow field can reach 3 ~ 8 ℃, which can be more than 10 ℃ in severe cases. Therefore, several requirements outlined above must be met as far as possible to ensure the uniformity of environmental parameters around the tested product. According to the principle of heat conduction, the temperature of the air flow near the box wall is usually 2 ~ 3 ℃ different from the center temperature of the flow field, and may reach 5 ℃ at the upper and lower limits of high and low temperature. The difference between the temperature of the box wall and the temperature of the flow field near the box wall is 2 ~ 3 ℃ (depending on the structure and material of the box wall). The greater the difference between the test temperature and the external atmospheric environment, the greater the temperature difference. Therefore, the space within the distance from the box wall (100 ~ 150mm) is unusable. Relevant standards stipulate that the wind speed in the warm and wet box shall be less than 1.7m/s during the environmental test. For the test itself, the smaller the wind speed, the better. Excessive wind speed will accelerate the heat exchange between the surface of the test piece and the flowing air flow in the box, which is unfavorable to the authenticity of the test. However, in order to ensure the uniformity in the chamber, it is necessary to have circulating air in the chamber. However, for the rapid temperature change high and low temperature test chamber and the multi factor comprehensive environmental test chamber such as temperature, humidity and vibration, in order to pursue the temperature change rate, it is necessary to speed up the flow rate of circulating air flow in the chamber, and the wind speed is usually 2 ~ 3M / s. Therefore, the wind speed limit is different for different purposes. In order to more accurately simulate the actual environmental conditions suffered by products in nature, it is necessary to ensure that the surroundings of the tested products are under the same temperature environmental conditions in the environmental test. Therefore, the temperature gradient and temperature fluctuation in the test chamber must be limited. In the constant temperature and humidity testing machine, the humidity i...

Comparative Analysis of Cylindrical Lithium Ion Battery and Prismatic Lithium Ion Battery ▶ Battery shape: prismatic lithium-ion batteries can be flexible in any sizes, which the cylindrical battery can’t work the same. ▶ Rate capability: due to the process limitation of cylindrical lithium-ion battery welding multipole tabs, the rate capability is slightly worse than that of prismatic. The same positive electrode material, negative electrode material and electrolyte are used, so the discharge platform is consistent in theory, but the internal resistance of prismatic battery is slightly superior, so the discharge platform is slightly higher. ▶ Product quality: the process of cylindrical lithium-ion battery is very mature, the probability of secondary slitting defects of pole pieces is low, and the winding process is more mature and automatic than the lamination process. At present, the lamination process is still semi manual, so there is an adverse impact on the quality of relevant batteries. ▶ Pole tab welding: the pole tab of cylindrical lithium-ion battery is easier to weld than prismatic battery, and the prismatic battery is prone to false welding, which affects the battery quality. Battery welding machines for them also have different requirements. ▶ Pack composition: cylindrical batteries are relatively easy to use, so the pack method is simple and the heat dissipation effect is good. The heat dissipation of prismatic batteries should be handled well when packing. ▶ Structural features: the chemical activity energy at the corners of the prismatic lithium-ion battery is poor, and the performance of the battery decreases obviously after long-term use. Generally speaking, cylindrical and prismatic batteries have their own advantages and disadvantages. Each battery has its own dominant category. For example, there are more lithium iron phosphate in prismatic batteries. With the introduction of the new subsidy policy for new energy vehicles, the system energy density of batteries has become an important evaluation index. Acey new energy is a professional supplier of prismatic battery machines and cylindrical battery pack machines. Just contact ACEY for more information.   

Working Principle of BMS Lithium Battery Management System What is lithium ion battery BMS system? BMS lithium battery management system can ensure the use safety of power lithium battery pack, which is the primary task of lithium power battery management system. The requirements of battery management system for different cell types are often different. Generally, BMS lithium battery system usually includes detection module and operation control module. 1. The composition of battery management system BMS lithium battery system, commonly known as battery nanny or battery housekeeper, is mainly used to intelligently manage and maintain each battery unit, prevent overcharge and overdischarge of the battery, prolong the service life of the battery and monitor the state of lithium battery. BMS lithium battery management system unit includes BMS battery management system, control module, display module, wireless communication module, electrical equipment, battery pack for supplying power to electrical equipment and collection module for collecting battery information of battery pack. 2. How does the BMS work? The lithium battery BMS determines the state of the whole battery system by detecting the state of each single battery in the power battery pack, and carries out corresponding control adjustment and strategy implementation for the power battery system according to their state, so as to realize the charge and discharge management of the power lithium battery system and each single battery, so as to ensure the safe and stable operation of the power battery system. People will use BMS testing machine in a pack assembly line to do such a job. 3. The role of each BMS module The topology of typical lithium battery management system is mainly divided into two parts: master control module and slave control module. Specifically, it is composed of central processing unit, data acquisition module, data detection module, display unit module, control components, etc. Generally, the data information communication between modules is realized by using internal CAN bussing technology. Based on the functions of each module, BMS can detect the voltage, current, temperature and other parameters of power lithium battery in real time, realize thermal management, balance management, high voltage and insulation detection of power battery, and calculate the remaining capacity, charge and discharge power and SOC & SOH state of power battery. A good BMS lithium battery management system has a temperature sensor, which can monitor the voltage of a single battery pack and detect low-performance batteries before battery pack sealed and finished. This 100% test guarantees higher production, higher battery capacity and reduced warranty commitments. A good battery management system also records the date and information of mechanical impact and deep discharge, so it can avoid false warranty claims. Excellent BMS can also detect the humidity of lithium battery pack to avoid acc...

As a new generation of chemical storage battery, lithium-ion battery has high working voltage, large volume and weight energy density, stable charge discharge voltage platform, long service time, low temperature resistance and environmental friendliness. It has been widely used in notebook computers, mobile communications, electric toys, visual wearable products and other fields. In recent years, with the intensification of energy crisis and environmental pollution, with the vigorous promotion of the state, it will become the preferred power supply for electric vehicles. Carbon negative electrode materials include graphite and non graphite (such as lithium titanate). Graphite negative electrode has the advantages of low lithium embedding potential (< 1.0vvsli / Li), high lithium embedding capacity, good conductivity, high safety and low price. It is the mainstream negative electrode material of commercial lithium-ion battery at present. However, due to the structural defects of graphite negative electrode materials, it has poor matching with the electrolyte. In the process of charge and discharge, it is easy to co embed with propylene carbonate organic solvent in the electrolyte, resulting in structural damage, which affects the cycle stability and charge and discharge efficiency of the battery. At the same time, the anisotropic structure of graphite affects the diffusion direction of lithium ions in the graphite structure and limits the specific capacity of graphite cathode material. These problems hinder the application of carbon anode materials in electronic mobile devices, electric vehicles and other fields. As a kind of carbon anode materials, hard carbon (HC) has isotropic structure characteristics, larger layer spacing than graphite, and fast lithium ion diffusion during charging, which makes it have better rate performance. At the same time, hard carbon material also has the advantages of good cycle performance, low price and high safety. It has attracted people's attention in the fields of electric vehicles and so on. Acey new energy provides hard carbon raw material powder for the negative electrode of lithium ion battery.

What is lithium ion battery cell grading? Simply, li-ion battery grading is cell capacity grading or sorting, performance screening and grading. When the battery cell is being graded, the data of each detection point is obtained through computer management, so as to analyze the data such as the capacity and internal resistance of these batteries, and determine the quality grade of lithium battery. This process is called cell grading. After a batch of lithium batteries are made, although the size is the same, the capacity of the batteries will happen to be different. Therefore, each battery must be fully charged according to the specification, and then fully discharged according to the specified current. The capacity of the battery is the time taken to discharge the electricity multiplied by the discharge current. Only when the tested capacity meets or exceeds the designed capacity, the lithium battery is qualified, while the battery less than the designed capacity cannot be regarded as qualified. What is the function of lithium battery capacity sorting? The produced lithium batteries cannot be sold immediately. They should be stored for at least 15 days. The lithium batteries produced cannot be sold immediately. They should be stored in storage for at least 15 days. During this period, some internal disadvantages will appear, such as excessive self discharge, so as to eliminate those whose capacity can not reach the grade or quality problems. The battery capacity grading machine has various channels like 256 channels, 512 channels, and each channel can start and stop individually with fast reatction speed. Each channel has independent constant current source and constant voltage source. The current and voltage are sampled in real time, and the constant flow and constant voltage can be switched continuously without disturbance. It can be used for cycle life test. The classification and grouping of lithium batteries is to select the monomers with the same internal resistance and capacity for combination. When come into a pack, only those with very similar performance can form a lithium battery pack. For example, in order to meet the energy demand of electric vehicles, power battery packs often need to be composed of dozens to thousands of batteries. Affected by the complexity of the system, the behavior of battery packs has its uniqueness. It is not a simple addition and subtraction method of single batteries that can obtain the performance of lithium battery packs. Requirement capacity accuracy of lithium battery In order to improve the cycle life, stability, self discharge, safety and other electrochemical properties of lithium batteries, the consistency of lithium batteries must be strictly controlled or the battery grade must be accurately evaluated. Therefore, there are high requirements for the measurement accuracy of current and voltage of chemical forming and capacity grading equipment, which is limited to the acquisition accuracy of sensor...