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08
06-2022
The difference between lithium chargers and lead-acid chargers
As lead-acid battery chargers are generally set to two-stage or three-stage charging mode, the voltage levels of lithium batteries and lead-acid batteries are not matched. And there are also many kinds of lithium batteries, and the battery performance and battery protection plate parameters may be different. Therefore, lithium batteries do not have universal battery chargers like lead-acid batteries. Generally speaking, lithium batteries are shipped with a special charger. In order to protect lithium batteries, a special charger is required. The difference between lithium battery charger and lead-acid charger At present, the chargers for electric vehicles in the market are mainly of the switching power supply type, which have the advantages of power saving, small size, light weight and mature technology. Only the lead-acid battery freight tricycle, but also use the frequency transformer type charger, simple, reliable, cheap, low requirements for the use of the environment. Switching power supply type charger is essentially a can be called a regulated power supply. Specific fork points to pulse-width modulation chip TIA94 as the core of the half-bridge type and pulse-width modulation chip UC3842 as the core of the flyback type two types. The latter occupies more than 90% of the market because of the advantages of low cost, cycle-by-cycle protection. The specific circuit that follows is a specific analysis of these two types of typical circuits. 1, lead-acid charger three-stage charger Nearly a century, the classic ordinary lead-acid charger for 0.1C charge J2-14 hours, very beneficial to the battery. Nowadays, people's life and work pace is accelerated, the electric car charger changed to 0.15C-0.2C charge 6-8 hours. The so-called three stages refers to constant current, con
08
06-2022
How to choose a lithium battery charger when the cooling is on?
As the temperature gradually decreases, the pace of people's lives is significantly slower than in summer, and EV owners have a deeper understanding that the range in winter is significantly shorter and the charging time is longer. Why does the range of electric vehicles decrease in the cold winter? The electric car on the market is mostly lithium battery energy storage. The lithium battery principle is a "rocking chair" electrochemical energy storage process. The lower the temperature, the worse the activity of the lithium battery, which directly leads to a significant reduction in charging and discharging efficiency, in general, the working temperature of lithium batteries is between -20 ℃ and 60 ℃. In winter, how to maintain the lithium battery and reduce the degree of damage to the lithium battery in winter. 1.Do not use lithium battery in low temperature environment When the temperature is lower than -20℃, the battery may automatically enter the hibernation state, which is harmful during use. 2.Charge as you go When the battery is too low, charge it in time and charge it as you go. 3.Do not charge for a long time Fast wheel system products, charging time is 1.5 ~ 3h, full that pull. When charging, do not leave to prevent unexpected situations. 4.Use regular charger Use of poor quality chargers, lithium batteries will be damaged, and may even cause a fire. If you need to replace the charger, please buy a regular charger on the regular channels to protect the quality of charging. How to choose the right lithium battery charger? The importance of the lithium battery in the e
06
05-2022
On the other hand, it means that the real wireless charging era is coming, electronic products, electric car industry, etc. will take wireless charging mode! 1. Wireless charging technology is becoming increasingly mature Wireless charging, also known as induction charging, non-contact induction charging, is the use of near-field induction, that is, inductive coupling, by the power supply device (charger) to transmit energy to the power device, the device uses the received energy to charge the battery, and at the same time for its own operation. The inductive coupling between the charger and the device that uses electricity transmits energy without wires between the two, so that both the charger and the device that uses electricity are free of exposed conductive contacts. Along with the development of science and technology, today's wireless charging technology is more mature, the application industry and the scene is more abundant, in smart phones, wearable devices, cars and other products can be about the figure of wireless charging. 2. Electric vehicles enter wireless charging mode We are familiar with the market about electric car brands began to gradually take the lead in the action of wireless charging mode. 2021 Yadi Technology Global Multiplication Strategy Summit, Yadi for the global premiere of electric car wireless charging system. With the official launch of G6S equipped with intelligent wireless charging technology, recreating a technical peak that other brands can hardly hope for, it also marks the official arrival of the industry's spaced charging era. The wireless charging technology with sixteen invention patents can increase the charging efficie
09
06-2022
BMS battery management system from shallow to deep all-round analysis
What is BMS? BMS (BATTERY MANAGEMENT SYSTEM), commonly known as battery nanny or battery housekeeper, is designed to intelligently manage and maintain each battery cell, prevent overcharging and overdischarging, prolong battery life, and monitor battery status. BMS Battery Management System Module BMS battery management system unit includes BMS battery management system, control module, display module, wireless communication module, electrical equipment, battery pack for powering electrical equipment and collection module for collecting battery information of battery pack, BMS battery management system is connected to wireless communication module and display module respectively through communication interface, the output end of said collection module is connected to the input end of BMS battery management system The output of said acquisition module is connected to the input of the BMS battery management system, the output of said BMS battery management system is connected to the input of the control module, said control module is connected to the battery pack and the electrical equipment, respectively, and the BMS battery management system is connected to the Server server side via the wireless communication module. Composition of BMS? The battery management system is closely integrated with the power battery of the electric vehicle. It detects the voltage, current and temperature of the battery in real time through sensors, and also performs leakage detection, thermal management, battery equalization management, alarm reminding, calculates the remaining capacity (SOC), discharge power, reports the degree of battery deterioration (SOH) and remaining capacity (SOC) status, and also based on the voltage and current and temperature of the battery It also controls the maximum output power with algorithms to obtain the max
06
05-2022
Superpower company provide the bms for CATL
Ningde Times' third generation CTP (Kirin battery) technology is here. Recently, Ningde Times Chief Scientist Wu Kai, said at the 2022 EV 100 Forum that CATL has launched the third generation of CTP technology through continuous technology iteration, which is internally called "Kirin Battery", and continues to lead the industry in system weight, energy density and volumetric energy density. "With the same chemistry and the same pack size, the Kirin battery pack can deliver 13% more power than the 4680 system." Wu Kai said, "Kirin battery" will be officially released in April this year. Last September, Tesla debuted the disruptive 4680 battery at the Battery Day event, which became a hot technology for industry discussion. Some industry bodies predict that 4680 will become the mainstream direction in a period of time. The emergence of the "Kirin battery" will undoubtedly have a significant impact on the entire industry chain, and now 4680 is not yet mass production, but Ningde Time has launched better technology products. 1. The rise of large cylindrical battery, "Kirin battery" counterattack Battery has been the focus of the car companies, battery manufacturers, according to different packaging, power battery can be divided into cylindrical, square and soft package and other types. In China, mainly square batteries, in addition to Tesla, there are more than 90% of electric vehicles using square batteries. Data show that in 2021, China's power battery installation, square batteries account for about 80%. Ningde Time is the "square big brother". Ningde Time CTP battery and BYD blade battery similar, recognized by many parties, including Tesla lithium iron phosphate battery using Ningde Time CTP technology, group energy density of 150-160wh/kg, the cost is lower than the ternary battery about 15%. With Tesla's global sal
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