Today there are many high-tech devices to li ion battery packs. There will be a growing demand for portable and energy-efficient equipment due to the availability of advanced technologies. Therefore, the demand for high-capacity and long-life batteries in various industries is also growing. This is why there is a growing interest in 21700 cells to replace 18650 cells for custom lithium ion battery packs.
21700 battery packs have gained significant attention in meeting the need. Unmanned Aerial Vehicles (UAVs), Drones, and UAVs are becoming more and more popular in a variety of industries including photography, agriculture and delivery services. 21700 battery packs are able to provide higher energy density and longer flight times, which is beneficial for UAV applications. Next, we’ll take you on an in-depth look at 21700 battery packs and show you the real reasons for their increasing adoption.
Understanding the Technical Specifications and Composition of 21700 Batteries
The 21700 battery is a type of cylindrical battery, the number 21 means the outer diameter of the cylindrical cell is 21mm; the number 700 means the height of the cylindrical cell is 70mm. Compared with the same material of the cells, 21700 batteries can have more than 35% capacity than a typical 18650 cylindrical lithium battery. The most common capacity of 21700 batteries are 4200mAh battery from Molicell P42A, 4000mAh from Samsung 40T, and 5000mAh from Samsung 50E.
Technical Specifications Features Of 21700 Li-ion Cell:
- Dimensions: Diameter of 21mm and height of 70mm
- Nominal Voltage: 3.6V or 3.7V
- Typical Capacity: 4Ah – 5.5Ah (varies depending on manufacturer and cell chemistry)
- Energy Density: 250-350 Wh/kg (increasing with newer technologies)
- Cycle Life: 1000-2000 cycles (depending on discharge rate and depth of discharge)
- Discharge Rate: 10C-20C (can be higher for specialized applications)
- Operating Temperature: -20°C to +60°C
The Main Compositions of 21700 Rechargeable Battery：
- Cathode: Typically Lithium Nickel Manganese Cobalt Oxide (NMC) or Lithium Iron Phosphate (LFP)
- Anode: Graphite
- Electrolyte: Lithium hexafluorophosphate (LiPF6) dissolved in a non-aqueous organic solvent
- Separator: A porous membrane that prevents contact between the cathode and anode
- Can: Aluminum or stainless steel.
Understanding the technical specs features and composition of 21700 batteries makes us more professional in designing custom 21700 battery packs for various industries.
Custom 21700 Battery Pack: Meeting Industry-Specific Requirements
Custom 21700 battery packs have gradually become the battery solution of choice for specific needs in various industries. For example, Tesla, according to the data released by Tesla, after using 21700 battery packs, the battery capacity went up by 35%, the energy density increased by about 20%, and the cost is expected to decrease by 9%.
The energy density of a 21700 single unit is higher than a single 18650 unit. Besides, the same energy for the battery unit can be reduced by one-third of the number of the same energy. The reduced energy of batteries is used in the metal structure and the number of electrical accessories, which is reduced by 10% the weight of lithium batteries.
The custom 21700 battery pack emerges as a key player in meeting industry-specific requirements, providing enhanced performance, reliability, and efficiency. Battery manufacturers are continuously innovating to offer more flexible design options with advanced cell technologies and sophisticated battery management systems. It will empower engineers and designers to create cutting-edge products that meet the specific needs of their industries.
Case Study: Electric Surfboard Powered by 21700 Battery Pack
Introducing the latest innovation in battery technology, the 43.2V 40Ah 21700 battery pack for electric surfboards, which is the upgraded version of the 43.2V 35Ah 18650 battery pack. The 43.2V 40Ah 21700 battery pack is manufactured by CM Batteries with high performance and long-lasting lifecycles. The cutting-edge battery pack boasts the new smart BMS and abstract heat technology, ensuring optimal functionality and dependability.
At CM Batteries, our engineering team takes pride in their exceptional expertise in designing custom lithium battery packs specifically tailored for electric surfboards. With extensive experience in creating waterproof solutions, you can enjoy a product engineered to withstand the demanding conditions of water sports.
In conclusion, the growing demand for portable and energy-efficient devices has brought an increasing demand for 21700 battery packs. The technical specifications and composition of 21700 batteries further highlight their potential and impact on multiple industries. CMB is a leading battery pack manufacturer that can custom 21700 battery pack solutions for your specific industry, do not hesitate to contact us and we will be able to offer expert advice and assistance.
