5kw 48v powerwall.Lithium battery research and development needs to seek a balance between safety, cost and performance.

　　At present, the full electrification of automobiles has become a global consensus. Countries are actively promoting the withdrawal of fuel vehicles and formulating relevant guidance policies. Car companies have formulated relevant strategies. As of 2018, 15 countries and regions have plans or have announced Internal combustion engine cars will be discontinued. However, there are still many contradictions that need to be resolved to fully enter the era of new energy vehicles, including driving range and energy density, market price and cost, fast charging and dynamic performance, high and low temperature operating conditions and temperature sensitivity, etc.

　　In BAK’s view, as an important driving force of the new energy vehicle industry, the lithium battery industry has a solution to the above contradictions. Chen Hui said: "The famous Maslow's hierarchy of needs theory explains the stepwise development of human needs. This theory is also applicable to battery development. Among the three major needs of safety, cost and performance, safety is "food and clothing" and cost is " "Well-off" and "rich" in terms of performance. The three are indispensable and restrict each other. Faced with this situation, calibrating the balance of battery development and seeking a balance between safety, cost and performance will bring new breakthroughs to the new energy vehicle industry. "

　　BAK Battery: Lithium battery research and development needs to seek a balance between safety, cost and performance

　　First of all, in the process of battery development, safety is the premise of everything, and it is the development "subsistence line" that all battery manufacturers must reach. From raw materials to battery design, process capabilities, module structure and BMS systems, battery packs, vehicle design and vehicle use, every detail in each link affects the safety of new energy vehicle batteries. It can be seen that the safety of new energy vehicle batteries requires the collaborative cooperation of battery manufacturers, vehicle manufacturers and consumers, among which battery manufacturers play the most critical role and bear the most important responsibilities. Taking BAK batteries as an example, BAK strictly controls the quality of battery cells from structural design, top safety valves, positive and negative electrode materials, production processes, etc., and continues to explore BMS technology and liquid cooling design technology between modules to cooperate with the overall The structural design of the car manufacturer minimizes the risk factor for drivers and passengers, and protects battery safety with a consistent safety awareness.

　　Secondly, excellent performance represents a higher level of batteries and is also the top priority for battery manufacturers to continuously pursue and make breakthroughs. The breakthrough development of new energy vehicles needs to be based on battery safety and achieve effective improvements in battery performance such as energy density, fast charging, and long cycle, which will help new energy vehicles achieve ultra-long endurance, ultra-high lifespan, and improve efficiency. However, higher battery performance also means higher safety challenges to some extent. The innovative development of new energy vehicle batteries is inseparable from the protection of safety.

　　BAK Battery: Lithium battery research and development needs to seek a balance between safety, cost and performance

　　In addition, battery costs not only restrict the development of battery companies, but also effectively promote breakthroughs and innovations in battery performance. Taking BAK batteries as an example, BAK has improved battery energy density through technological innovation and effectively controlled material costs. At the same time, by increasing production scale and completing intelligent manufacturing upgrades, BAK has achieved improvements in production efficiency and product stability. Ultimately, Realizing economic benefits on the product side can truly reduce battery costs through improving product performance.

　　At present, the competition in the new energy automobile industry is fierce and the situation is grim. The battery industry bears a huge responsibility. On the premise of ensuring battery safety, it can achieve product performance improvement through technological innovation and effectively reduce battery costs, seeking a balance between safety, cost and performance. Tripartite balance is a solution for the battery industry and will also bring breakthrough development to the entire new energy vehicle industry.

　　Low temperature and high energy density 18650 3350mAh-40℃ 0.5C discharge capacity ≥60%

　　Charging temperature: 0~45℃ Discharge temperature: -40~+55℃ Specific energy: 240Wh/kg -40℃ Discharge capacity retention rate: 0.5C Discharge capacity ≥ 60%

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　　As a leading lithium battery manufacturer in the industry, BAK will actively explore high-energy batteries while ensuring safety, further promote the overall improvement of power battery performance, insist on using intelligent manufacturing technology to lead industry standards, and provide solutions for the development of the new energy automobile industry. A steady stream of "core" power.

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