How to correctly connect lithium batteries in series and in parallel？

Published by BSLBATTMar 01,2019

The purpose of parallel connection of lithium batteries is to increase the capacity. Therefore, parallel charging of lithium batteries has different design characteristics compared with single-cell lithium batteries, mainly reflected in the consistency of charging current design and parallel battery. The characteristics of the parallel lithium battery are: the voltage is constant, the battery capacity is added, the internal resistance is reduced, and the power supply time is prolonged. The core content of parallel charging is the size of the parallel current and its effect. According to the parallel theory, the main circuit current is equal to the sum of the currents of the respective branches. Therefore, the n-th parallel lithium battery that has been combined into a battery pack should achieve the same charging efficiency as the single-cell battery, and the charging current should be the sum of the n lithium battery currents. Under the formula of Ohm’s law: I=U/R, this de...

Published by BSLBATTFeb 25,2019

From 5 to 7 March, Wisdom Power will participate in Middle East Electricity, the largest fair in the Middle East dedicated to operators active in the fields of electrical installations, production, transmission and distribution of energy, lighting and electronics. The event will take place in Dubai at the World Trade Center and will be the place to develop new growth opportunities, meet the Middle Eastern customers as well as buyers and professionals from over 120 countries. Wisdom Power will be exhibiting in a special area, and will showcase the BP and BPD ranges, both with AGM technology, suitable for Reserve Power, security systems, UPS and telecommunications. In addition to these, Wisdom Power develop and produce advanced series “BSLBATT” (Best Solution Lithium Battery). Lithium Battery offers state of the art technology Lithium Iron Phosphate-the safest and most robust lithium chemistry, designed for different uses, from utilities to oil & gas, from UPS to telecommunica...

Published by BSLBATTFeb 22,2019

Lithium ion battery materials are essential components in the production of lithium-ion batteries, which are widely used in various electronic devices, electric vehicles, and renewable energy systems. These batteries consist of several key materials that work together to store and release electrical energy efficiently. Cathode Materials State-of-the-art cathode materials include lithium-metal oxides [such as LiCoO2, LiMn2O4, and Li(NixMnyCoz)O2], vanadium oxides, olivines (such as LiFePO4), and rechargeable lithium oxides.11,12 Layered oxides containing cobalt and nickel are the most studied materials for lithium-ion batteries. They show a high stability in the high-voltage range but cobalt has limited availability in nature and is toxic, which is a tremendous drawback for mass manufacturing. Manganese offers a low-cost substitution with a high thermal threshold and excellent rate capabilities but limited cycling behavior. Therefore, mixtures of cobalt, nickel, and manganese are...

Published by BSLBATTFeb 20,2019

Lithium Ion Batteries and Their Manufacturing Challenges Lithium ion batteries are manufactured in sets of electrodes and then assembled in cells. Active material is mixed with polymer binders, conductive additives, and solvents to form a slurry that is then coated on a current collector foil and dried to remove the solvent and create a porous electrode coating. There is no single lithium ion battery. With the variety of materials and electrochemical couples available, it is possible to design battery cells specific to their applications in terms of voltage, state of charge use, lifetime needs, and safety. Selection of specific electrochemical couples also facilitates the design of power and energy ratios and available energy. Integration in a large format cell requires optimized roll-to-roll electrode manufacturing and use of active materials. Electrodes are coated on a metal current collector foil in a composite structure of active material, binders, and conductive additives, r...

Published by BSLBATTFeb 15,2019

With the promotion of social energy conservation and environmental protection, more and more environmentally friendly products have been applied to the market. In the battery industry, the ternary lithium battery quickly occupied the market with numerous advantages and gradually replaced the traditional lead-acid battery. For the traditional battery, the ternary lithium battery has the advantages of long life, energy saving, no pollution, low maintenance cost, complete charge and discharge, light weight, etc. It is said that the life of the ternary lithium battery is long and to what extent? Ternary lithium battery What is a ternary lithium battery? In nature, lithium is a light metal with a small atomic mass*, which has an atomic weight of 6.94 g/mol and ρ = 0.53 g/cm3. Lithium is chemically active, and it is easy to lose electrons to be oxidized to Li+. Therefore, the standard electrode potential is *negative, -3.045V, and the electrochemical equivalent * is small, 0.26g/Ah. T...

Published by BSLBATTFeb 13,2019

Lithium battery price composition The price of lithium battery is mainly composed of three major components: battery core, protection board and outer casing. At the same time, due to the power consumption and current of the electric appliance, the material of the connecting piece between the batteries (conventional nickel sheet, formed nickel piece) The selection of copper-nickel composite sheets, jumpers, etc. will affect the cost. Different connectors (such as aviation plugs, from a dozen yuan to thousands of dollars) may also have a greater impact on costs, and there is Different PACK processes can also affect costs. Factors affecting the price of lithium batteries First, the selection of the battery core: First, the selection of batteries for different material systems will affect the price of the entire lithium battery. Lithium batteries according to different cathode materials, there will be lithium manganate (3.6V), lithium cobalt oxide (3.7V / 3.8V), lithium nickel cobal...

Published by BSLBATTJan 16,2019

Can I charge my lithium battery with a lead acid charger? This is a question we get asked every day by the general public. Lithium batteries are not like lead acid and not all battery chargers are the same. A 12v lithium LiFePO4 battery fully charged to 100% will hold voltage around 13.3-13.4v. Its lead acid cousin will be approx 12.6-12.7v. A lithium battery at 20% capacity will hold voltage around 13V, its lead acid cousin will be approx 11.8v at the same capacity. As you can see, we are playing with a very narrow window of voltage with lithium, less than 0.5V over 80% capacity. A Lithium LiFePO4 charger is a voltage-limiting device that has similarities to the lead acid system. The differences with Li-ion lie in a higher voltage per cell, tighter voltage tolerances and the absence of trickle or float charge at full charge. While lead acid offers some flexibility in terms of voltage cut off, manufacturers of LiFePO4 cells are very strict on the correct setting because Li-ion c...

Published by BSLBATTJan 18,2019

Writer Zhang Yuelan said: “The beauty of travel lies in its unknown nature. No matter how many strategies you have made, you have never really known it before you really set foot on your destination.” Huimin Street When we come to Xi’an, Huimin Street is the place we have to go. The Bell Tower Hotel is just across the street from the Bell Tower, which is located in the center of the city from the map. Settlement of luggage, out of the hotel is the beginning of the lights, the opposite bell tower is dressed up by neon lights. Crossing two streets, I came to the famous “Huimin Street” in Xi’an, where I wanted to eat a big meal. I was fooled by the street view: the whole pedestrian street was crowded with people and smoke. The barbecue taste is his natural taste. We have never eaten mutton steamed bun or biangbiang noodles. For the first time, we eat mutton steamed bun. The price tag says that the high quality mutton is 20 yuan a bowl, and the mut...

Published by BSLBATTJan 14,2019

The full name of lithium iron phosphate battery is lithium iron phosphate ion battery, referred to as lithium iron phosphate battery. Since its performance is particularly suitable for the application of power, the word “power” was added in the name, namely lithium iron phosphate power battery. It is also called “lithium iron (LiFe) power battery”. 1. Conventional charging During the conventional lithium ion charging process, a conventional Li-ion Battery containing lithium iron phosphate (LiFePO4) needs two steps to be fully charged: step 1 uses constant current (CC) to reach about 60% State of Charge (SOC); step 2 takes place when charge voltage reaches 3.65V per cell, which is the upper limit of effective charging voltage. Turning from constant current (CC) to constant voltage (CV) means that the charge current is limited by what the battery will accept at that voltage, so the charging current tapers down asymptotically, just as a capacitor charged thr...

Published by BSLBATTJan 07,2019

【Experts Confirmed】BSLBATT Lithium Battery Charging Method Has Increased My Battery Life By Ten Times Lithium iron phosphate is a type of lithium-ion battery, since the energy is stored in the same way, moving and storing lithium ions instead of lithium metal. These cells and batteries not only have high capacity, but can deliver high power. High-power lithium iron phosphate batteries are now a reality. They can be used as storage cells or power sources. In addition, Lithium Iron Phosphate batteries are among the longest lived batteries ever developed. Test data in the laboratory show up to 2000 charge/discharge cycles. This is due to the extremely robust crystal structure of the iron phosphate, which does not break down under repeated packing and unpacking of the lithium ions during charging and discharging Lithium Iron Phosphate Parameters Nominal voltage 3.2 Volts Peak voltage 3.65 Volts Note our new data on capacity versus charge voltage Absolute Minimum discha...

Published by BSLBATTDec 21,2018

Dear Mr/Mrs , please find hereafter our latest newsletter with topics around Wisdom Power! We would like to thank you very much for your cooperation during the last year.   The year is slowly coming to an end and we would like to give a short review of the past year with insights into some exciting projects. We wish you and your families a Merry Christmas and a Happy New Year! Enjoy reading. [Happy New Year Blessing Video…] Find here our latest stories for you: Exhibition The success of the exhibition has been held by the customer’s praise. We focus on the ability of maximizing the value of the product to the customer and help them reduce their operating cost. This is achieved through extensive market research and R&D! [ Read more…] Factory Video Successful Shooting Find out everything about the BULLSPOWER battery factory in this video: https://youtu.be/9tnYG0zMcCI HIGH PERFORMANCE BATTERY Long design life more than 1500 cycles at 80% DOD | Excell...

Published by BSLBATTDec 07,2018

“Is your battery protected when battery is over-charged or over-discharged?” Our customers usually asked this. Let’s check the details of the over-charge and over-discharge protection of lithium batteries. Over Charge Conditions Various battery chemistry require specific charging profiles to optimize performance and prevent safety issues during charge. Generally, almost all Li-ion battery chargers use a constant current/constant voltage charging algorithm. Once the charger enters constant voltage mode it is important to ensure the charge does not exceed the maximum level allowed to avoid exposing battery is overcharging conditions as it can cause excessive internal temperature rise and lead to premature failure. Over Discharge Conditions Typical rechargeable lithium ion battery cells can safely operate down to 2.75V/cell. However, when an unprotected lithium cell is discharged past the minimum voltage level you run the risk of damaging the cell and ultimately l...