China announces visa exemption with six countries！ We are very pleased with this news. After the implementation of China's visa free policy, many countries have also issued equivalent visa free policies for China, which means that our communication with European customers will be more convenient. Bosa warmly welcome you to visit our factory and exchange views on our battery production line.   https://www.youtube.com/watch?v=aw8hIlSDP0o On November 23, 2023, the Chinese Ministry of Foreign Affairs announced: In order to further promote personnel exchanges between China and foreign countries, serve high-quality development, and open up to the outside world at a high level, China has decided to pilot the expansion of the scope of unilateral visa free countries, and implement a unilateral visa free policy for ordinary passport holders from six countries: France, Germany, Italy, the Netherlands, Spain, and Malaysia. From December 1, 2023 to November 30, 2024, ordinary passport holders from the aforementioned countries will come to China for business, tourism, family and friends visits Entry is exempt from visa if the entry period does not exceed 15 days.   Bosa looking forward to creating more cooperation opportunities with you and embarking on a new journey.

In 2022, BOSA developed a liquid cooling container ESS based on market demand, with a single 40-ft high container capacity of 5GWH;The container adopts a liquid cooling standard container system, with 128pcs 280Ah battery cells connected in series in each standard container reaching 124.8V 34.9Kwh.The liquid cooling battery system provides a more stable operating temperature, keeping the battery always operating within the most suitable temperature range, which is beneficial for improving the cycle life and safe operation of the battery system, and reducing safety risks. After strict design, thermal simulation, and actual testing, our liquid cooling battery pack system adopts a bottom coating method to optimize the amount of coating, reduce costs, and achieve thermal control efficiency of the super battery system. The mass application of liquid cooling systems has accumulated a large amount of data for optimizing thermal control strategies, providing strong support for the development of our other liquid cooling projects. Mass delivery of battery modules and systems enables us to better help customers achieve cost reduction goals."Thank you to our partners for their support. In 2023, our liquid cooling container ESS delivered 5Gwh, which is a breakthrough for us," said BOSA Energy Production Director Mr. Zhou.  "Respecting the opinions of our partners and providing high-quality customized solutions is our commitment to our customers. Standardized modules and drawings help reduce the difficulty of customer assembly." Mr Zhou introduced, "This is the way we have been persisting in our work, and we will continue to promote and optimize it in the future." “In 2024, we plan to launch a 5Mwh in 20-ft container ESS system to further improve the energy density of ESS and save energy storage system footprint.” “The sodium ion battery energy storage demonstration project has been launched in 2023, and the ESS market capacity will have greater growth from 2024 to 2026. It is expected that sodium batteries will have more applications in energy storage systems. "We have also made some technical reserves," said by Mr.Zhou when discussing future technological directions Introduction. BOSA Energy has been committed to providing standard modules, draw, containerized ESS, and customized battery pack solutions, with products sold in over 30 countries worldwide，and known as battery supplier offers high quality and stable performance products.

LiFePO4 is used as the positive electrode of the battery, which is connected to the positive electrode of the battery by an aluminum foil, in the middle of which is a polymer diaphragm, which separates the positive electrode from the negative electrode, but the lithium ion Li can pass through it while the electrons e- can't pass through it, and on the right side of it is the negative electrode of the battery, which is composed of carbon (graphite), which is connected to the negative electrode of the battery by a copper foil. Between the top and bottom of the battery is the electrolyte of the battery, which is hermetically sealed by a metal shell. 1. The temperature should not be too highIf the UPS battery is used in an environment higher than the specified operating temperature, i.e., above 35C, the battery's power will continue to diminish, i.e., the battery's power supply time will not be as long as usual. If the equipment is charged at such temperatures, the damage to the battery will be even greater. Even storing batteries in a hotter environment will inevitably cause corresponding damage to the quality of the battery. Therefore, try to keep in the appropriate operating temperature is a good way to extend the life of lithium-ion batteries.2. Too low is not goodIf the use of lithium-ion in a low-temperature environment, that is, below 4C, the same will also be found in the use of UPS batteries time is reduced, and some of the original lithium-ion cell phone in a low-temperature environment and even charging. But do not worry too much, this is only a temporary situation, unlike the use of high-temperature environments, once the temperature rises, the molecules in the battery by the heat, it will be immediately restored to the previous power. 3. Life is movementTo maximize the effectiveness of lithium iron phosphate batteries, it is necessary to use it often, so that the electrons within the lithium battery is always in the flow state. If you do not use lithium-ion batteries often, please always remember to complete a charging cycle for lithium-ion batteries every month to do a power calibration, i.e., deep discharge and deep charge once.                                                      4, do not mix the battery with metal objects, so as to avoid metal objects touching the battery positive and negative poles, resulting in a short circuit, damage to the battery or even cause danger.5, lithium iron phosphate battery should be in a clean, dry, ventilated environment, should prevent contact with corrosive substances, away from sources of ignition and heat.We, BOSA Energy, have been focusing on the safety research of lithium batteries. If you have any questions about lithium batteries, please contact us. Let us explore the world of lithium batteries together.

Thank you for your attention to our productsThe Battery Show EUROPE Leaflet Germany 2023.5.23-25

In the lithium battery module, several single cells are connected into a power supply in series and parallel through conductive connectors, and are fixed in the design position through the process and structure to play the function of power charging and storage. It can be said that the basic role of the module is to connect, fix and security protection. The connection mode between the cell and the module mother of the battery not only affects the manufacturing efficiency, but also affects the performance of the battery after loading. Lithium battery module can be understood as the intermediate product of lithium ion cell and pack formed by combining it in series and parallel mode. Its structure must play a supporting, fixed and protective role in the cell, which can be summarized into three major items: mechanical strength, electrical performance, thermal performance and fault handling ability. Whether the battery can fix the position of the cell and protect it from destructive deformation, how to meet the requirements of current carrying performance, and how to meet the control of the cell temperature, will be the standard to judge the quality of the lithium battery module. The whole process of lithium battery module design includes the objectives of module design, integrating the details of module design, and having a complete verification process of module design, including structure, electrical and cooling safety. The first part is divided into several design levels： To meet the demand characteristics of the vehicle is equivalent to the product, mainly divided into structural design, electrical design, thermal design, safety design, according to the requirements of the cell to give enough pressure, through a certain pressure can effectively prevent the expansion of the cell, in the life to give a certain support. The second part, the manufacturing process： The most important is the cell from the single to stacking, welding, sampling line layout, CMU layout, the whole process and equipment assembly have specific requirements. The third part, maintenance consideration： The first step is to make the product. In the later stage, with the use of the vehicle, the maintenance of the whole lithium battery module, especially the damage of the sub-parts inside, should be combined with the manufacturing process and maintenance process. Key points of lithium battery module structure design: Reliable structure of lithium battery pack: vibration resistance; Process controllable: no excessive welding, virtual welding, to ensure that the cell is 100% without damage; Low cost: promote the automation of PACK production line, including production equipment and production loss; Easy separation: lithium battery module is easy to maintain, repair, low cost, good use of battery cells; To achieve the necessary heat transfer isolation to avoid the rapid spread of heat runaway, you can also consider this step into pack design. The unique advantages of the BOSA lithium battery module： 1)  TUV, UL, UN38.3, MSDS, CCS certification;   2) The module has temperature and voltage sensor pre-welded with wiring to the BMS, connection with BMS is "plug and play" type; 3) The module is of standard design and mature manufacture which has 40K electric vehicle/100Mwh ESS and yachts application experience; 4) It's universal to all BMS, not limited to BMS types; 5) It's flexible in configuration, 8 Pcs cell could be 1P8S 25.6V, 2P4S12.8V; 6) Modules are connected by Busbar and bolts into battery system. It is understood that at present, the module composition efficiency of cylindrical cells in the industry is about 87%, the system group efficiency is about 65%; the module composition efficiency of soft package cells is about 85%, the system group efficiency is about 60%; the module composition efficiency of square cells is about 89%, and the system group efficiency is about 70%. At present, the square cell module is indeed an optimal choice.

Lithium battery is one of the most commonly used rechargeable batteries nowadays. Due to its small size, light weight, low power consumption and long life, it is favored and supported by many consumer electronics products, such as wireless earphones, smartphones, electric bicycles and notebook computers wait. The rise of new energy vehicles has also made the development prospects of lithium batteries very good. According to data, the global lithium battery market will reach 130 billion US dollars in 2025. With the development of sustainable cutting-edge battery technology and the requirements for battery energy density in different application fields, the future development prospects of lithium batteries are very promising. First of all, lithium batteries will be more used in the future. Since lithium batteries can quickly provide stable power output, they can be perfectly used in new energy vehicles, robots and mobile devices, which will greatly help energy conservation and emission reduction. Secondly, due to the small size, light weight, and long life of lithium batteries, lithium batteries have been used in aircraft and spacecraft in recent years to replace traditional aluminum oxide and nickel-manganese batteries and become the preferred battery for future spacecraft. Therefore, lithium batteries will be more developed in the future. In addition, lithium batteries have good recyclability. Compared with other battery types, lithium batteries are easier to recycle, making lithium batteries almost completely replicable, so they can effectively improve environmental pollution problems.   Finally, the future development of lithium batteries depends on the development and realization of new technologies, including high energy density technology and low temperature constant electrical signal technology. And new solutions to combat the safety, reliability and recyclability of lithium battery technology, among others.   To sum up, lithium batteries have strong development potential in the future because of their advantages of small size, light weight and long lifespan.