The Ultimate Guide to Cylindrical Batteries

Cylindrical batteries can be divided into lithium iron phosphate batteries, lithium cobalt oxide batteries, lithium manganate batteries, and cobalt-manganese hybrid batteries based on filler materials. According to the type of shell, cylindrical lithium batteries can be steel shell lithium batteries and polymer shell lithium batteries.

If you are looking for more details, kindly visit Xiaolu.

Part 1. Characteristics of cylindrical batteries

1. Appearance of cylindrical lithium battery

Cylindrical lithium batteries generally comprise positive electrode material (nickel cobalt oxide or zinc manganate), separator paper, and electrolyte. The casing of the cylindrical battery is made of aluminum-plastic composite pipe.

2. Cylindrical lithium battery capacity
The rated energy density of a single cylindrical lithium battery is between 300 and 500Wh/kg. Its specific power can reach more than 100W. According to different models and specifications of cylindrical batteries, the actual performance of this type of battery varies.

3. Safety and reliability of cylindrical lithium batteries

Cylindrical batteries have the characteristics of high safety and stability, resistance to overcharge, high temperature resistance, and long service life.

4. Cylindrical lithium battery application

Cylindrical lithium batteries can be used as power sources. In addition, they can also be seen in digital cameras, MP3 players, notebook computers, car starters, power tools, and other portable electronic products.

Part 2. Structure of cylindrical battery

A general cylindrical lithium-ion battery consists of a casing, a cap, a positive electrode, a negative electrode, a separator, and an electrolyte. Generally speaking, the casing of a cylindrical battery is the battery’s negative electrode, and the cap is the battery’s positive electrode. The battery casing is made of nickel-plated steel plate.

The critical difference between power cylindrical batteries and ordinary cylindrical batteries lies in the conductive connection structure of the battery. A special high-current structure design is required because the general application current of power lithium batteries is relatively large.

Part 3. 7 common types of cylindrical batteries

Cylindrical lithium batteries usually have a five-digit model number. Starting with the numbers on the left, the first and second numbers refer to the battery diameter. The third number refers to the battery height. The fifth number refers to the circle.

There are many models of cylindrical lithium batteries; the more common ones are , , , , , , and .

1. battery

The battery is a lithium battery with a diameter of 10 mm and a height of 44 mm. It’s the same size as what we usually call an AA battery. The capacity of this kind of battery is generally very small, only a few hundred mah. This battery is mainly used in mini electronic products, such as flashlights, mini audio, speakers, etc.

2. battery

The battery is a lithium battery with a diameter of 14 mm and a height of 50 mm. This battery voltage is generally 3.7V or 3.2V. The nominal capacity of the battery is relatively small, a little larger than the battery, generally mah. The battery has excellent discharge performance and is mainly used in consumer electronics, such as wireless audio, electric toys, digital cameras, etc.

3. battery

The battery is a lithium battery with a diameter of 16 mm and a height of 34 mm. This kind of battery often appears in bright flashlights, LED flashlights, headlights, laser, lighting lamps, etc. Because the battery is shorter in height, its capacity is a little small.

4. battery

The battery is a lithium battery with a diameter of 18 mm and a height of 65 mm. Its most prominent feature is that the energy density is very high, almost reaching 170 Wh/kg. Therefore, this battery is a very cost-effective battery. Most of the batteries we often see are this type of battery. Because it is a relatively mature lithium battery. battery has good system quality stability in all aspects. batteries can be widely used in battery capacity applications of about 10 kWh, such as mobile phones, laptops and other small appliances.

5. battery

The battery is a lithium battery with a diameter of 21 mm and a height of 70 mm. Due to its increased volume and increased space utilization, the energy density of battery cells and systems can be increased. The volume energy density of the battery is much higher than that of the battery, and it is widely used in digital, electric vehicles, balance vehicles, solar lithium battery street lights, LED lights, power tools, etc.

6. battery

The battery is a lithium battery with a diameter of 26mm and a height of 65mm. Its nominal voltage is 3.2V. The nominal capacity is mah. batteries have excellent capacity and high consistency. It has gradually become an alternative trend to batteries, and will also gradually become popular in power batteries.

7. battery

The battery is a lithium-ion battery with a diameter of 32 mm and a height of 65 mm. This kind of battery has strong continuous discharge capability, so it is more suitable for electric toys and backup power supply. UPS battery, wind power generation system.

Part 4. Cylindrical battery voltage, capacity, charger and PCB

1. Rated voltage of cylindrical battery cells

3.7V/3.2V

2. Cylindrical battery cell capacity

Common cylindrical battery cell capacities are as follows:

• battery cell nominal capacity: 320mAh,
• battery cell nominal capacity: 500mAh-700mAh,
• battery cell nominal capacity: 600mAh-800mAh,
• battery cell nominal capacity: mAh
• battery cell nominal capacity: 700mAh,
• battery cell nominal capacity: 900mAh,
• battery cell nominal capacity: mAh-mAh,
• battery cell nominal capacity: mAh, mAh, mAh, mAh, mAh, mAh, mAh, mAh, mAh, mAh, mAh, etc.
• battery cell nominal capacity: mAh, mAh, mAh, etc.
• battery cell nominal capacity: mAh, mAh, mAh, etc.
• battery cell nominal capacity: mAh, etc.

3. Cylindrical battery pack voltage

Common cylindrical battery pack voltages are 3.2V, 3.7V, 6.4V, 7.4V, 9.6V, 11.1V, 12V, 14.8V, 22.2V, 24V, 36V, 48V, etc.

4. Cylindrical battery pack capacity

Common cylindrical battery pack capacities: 2AH, 4AH, 5AH, 6AH, 8AH, 10AH, 12AH, 15AH, 20AH, etc.

5. Cylindrical battery charger

Cylindrical battery chargers can be equipped according to different battery packs, and there is no specific charger.

6. Cylindrical battery PCB

Most cylindrical batteries have overcharge protection, overdischarge protection, short circuit protection, overcurrent protection, overheating protection and other functions to ensure battery safety.

Part 5. Cylindrical battery pros and cons

Advantages of cylindrical lithium batteries

1. The cylindrical battery production process is mature, the PACK cost is low, the battery product yield is high, and the heat dissipation performance is good;
2. Cylindrical batteries have formed a series of internationally unified standard specifications and models with mature technology and suitable for mass continuous production;
3. The cylindrical battery has a large surface area and a good heat dissipation effect;
4. Cylindrical batteries are generally sealed batteries, and there are no maintenance problems during use;
5. The cylindrical battery shell has high voltage resistance and will not cause swelling of square or soft-packaged batteries during use.

Disadvantages of cylindrical lithium batteries

1. The cylindrical lithium battery cell size is larger. When the current is discharged, the internal temperature of the winding core is relatively high.
2. The activity at the edge of the cylindrical lithium battery pole piece is poor. Battery performance declines more obviously after long-term use.
3. Cylindrical lithium batteries come in different sizes, resulting in poor versatility. The lamination process during battery production is uneven, resulting in poor consistency.

The above is a summary of all aspects of cylindrical batteries. Cylindrical lithium batteries are more suitable for large-volume automated combination production. Large-volume lithium-ion batteries such as electric bicycles and electric motorcycles are basically produced from cylindrical lithium batteries. Not only that, cylindrical lithium batteries are also recognized as green and healthy batteries. They are very environmentally friendly and can be used with confidence.

Part 6. FAQs

Cylindrical cells are a type of lithium-ion battery characterized by their cylindrical shape and robust metal casing. These cells play a key role in energy storage systems, offering high reliability and scalability. Industries such as electric vehicles and consumer electronics widely adopt these batteries. In , the global cylindrical lithium battery market was valued at USD 39.02 billion and is projected to reach USD 61.04 billion by . Their superior energy density and durability make them essential for powering modern devices and vehicles.

For customized battery solutions tailored to your needs, explore our offerings here.

Key Takeaways

• Cylindrical cells store energy well and last a long time. They are great for electric cars and gadgets we use daily.

• Standard sizes, like and , make designing batteries easier. These sizes work for many industries and uses.

• Cylindrical cells are built with safety in mind. Strong cases and pressure valves keep them working safely, even in tough situations.

Part 1: Key Features of Cylindrical Cells

1.1 Structure and Design of Cylindrical Cells

Cylindrical cells are meticulously designed to ensure durability and efficiency. Their cylindrical shape, combined with a robust metal casing, provides excellent structural integrity, making them suitable for demanding applications like electric vehicles and energy storage systems. Inside, these cells consist of several key components:

• Cathode (Positive Electrode): Typically made from materials like LCO, NMC, or LiFePO4, which influence the cell’s energy density and lifespan.

• Anode (Negative Electrode): Often composed of graphite or silicon-based materials to enhance capacity.

• Separator: A porous polyolefin membrane that prevents short circuits while allowing lithium ions to pass through.

• Electrolyte: A solution of lithium salts in organic solvents, facilitating ion movement between electrodes.

• Outer Casing: Constructed from steel or aluminum alloy to protect internal components and ensure safety.

The cylindrical design also aids in thermal management, as the uniform shape allows for even heat dissipation. This feature is critical for maintaining performance and extending the battery’s lifespan.

Note: The precision required in welding and handling during battery manufacturing ensures the reliability of cylindrical cells. Effective thermal management strategies further enhance their performance in high-energy applications.

1.2 Cylindrical Cell Naming Rules

The naming convention for cylindrical cells follows a standardized format that provides insight into their dimensions. For instance, the popular “” cell derives its name from its size:

• 18: Diameter of 18 millimeters.

• 65: Height of 65 millimeters.

• 0: Indicates a cylindrical shape.

  If you are looking for more details, kindly visit Cylindrical Lithium Cells.

  Featured content:
  Induction Annealing Machine - Super Audio Frequency mtc-30kw

High temperature corrosion resistant skeleton oil seal - Linde
Intro to Cassette Recorder Operation, Maintenance, and Repair

Other common sizes include (21 mm × 70 mm) and (46 mm × 80 mm). These standardized dimensions simplify integration into battery packs, ensuring compatibility across various devices and industries.

1.3 Common Cylindrical Cell Types

Cylindrical cells come in various chemistries, each tailored to specific applications. Below is a table summarizing the most common types:

Each type offers unique advantages. For example, LiFePO4 cells excel in safety and longevity, while NMC cells provide higher energy density, making them ideal for electric vehicles. The choice of chemistry depends on the specific requirements of the energy storage device or application.

Tip: When selecting a cylindrical cell, consider factors like energy density, cycle life, and thermal performance to ensure optimal results for your project.

For customized battery solutions tailored to your needs, explore our offerings.

Part 2: Pros and Cons of Cylindrical Cells

2.1 Advantages of Cylindrical Cells

Cylindrical cells offer a range of benefits that make them a preferred choice in energy storage systems and lithium-ion battery packs. Their design and performance characteristics provide significant advantages across various applications, including electric vehicles and consumer electronics.

• High Energy Density: Cylindrical cells deliver impressive energy density, enabling compact battery packs with extended runtime. This feature is particularly valuable in electric vehicles, where maximizing energy storage is critical.

• Scalability: The standardized sizes of cylindrical cells, such as and , simplify the process of scaling battery packs for different energy requirements. This modularity supports diverse applications, from small consumer electronics to large industrial systems.

• Efficient Heat Dissipation: The cylindrical shape promotes uniform heat distribution, reducing the risk of hotspots and enhancing thermal stability. This characteristic ensures reliable performance under demanding conditions.

• Durability and Longevity: The robust metal casing of cylindrical cells provides excellent mechanical strength, protecting internal components from external shocks. Combined with advanced chemistries like LiFePO4, these cells achieve a longer lifespan, making them cost-effective over time.

• Improved Charging and Discharging Rates: Cylindrical cells support faster charging and discharging cycles, which is essential for applications requiring high power output, such as robotics and industrial tools.

Tip: When designing battery systems, consider cylindrical cells for their durability and scalability. Their ability to withstand mechanical stress makes them ideal for high-performance applications.

2.2 Limitations of Cylindrical Cells

Despite their numerous advantages, cylindrical cells also have certain limitations that you should consider when selecting a battery solution. These drawbacks often depend on the specific application and design requirements.

• Limited Design Flexibility: The rigid cylindrical shape can restrict design options, especially in applications requiring custom battery configurations.

• Lower Packing Efficiency: Compared to prismatic or pouch cells, cylindrical cells leave more unused space when assembled into battery packs. This can reduce overall energy density at the system level.

• Increased Manufacturing Complexity: The winding process used in cylindrical cells, particularly in larger formats like , demands precise mechanical properties. This complexity can increase production costs and time.

• Thermal Behavior Challenges: Under high testing currents, cylindrical cells may exhibit thermal resistance issues in current collectors. This can impact performance, especially in applications requiring sustained high power output.

Note: While cylindrical cells excel in many areas, their limitations highlight the importance of evaluating your specific application needs. For custom solutions tailored to your requirements, explore our offerings here.

2.3 Safety Features in Cylindrical Cells

Safety remains a top priority in battery design, and cylindrical cells incorporate multiple features to minimize risks. These mechanisms ensure reliable operation, even under challenging conditions.

• Robust Outer Casing: The steel or aluminum alloy casing provides mechanical protection, reducing the likelihood of damage from external impacts.

• Pressure Relief Valves: Cylindrical cells include built-in pressure relief mechanisms to prevent explosions in case of overpressure.

Callout: Cylindrical cells are designed with safety in mind, making them a reliable choice for applications requiring high energy density and durability. For more insights into sustainable battery solutions, visit our sustainability page.

Part 3: Cylindrical Cells in Comparison to Other Cell Types

3.1 Cylindrical vs. Prismatic Cells

Cylindrical cells and prismatic cells differ significantly in design, performance, and application. Cylindrical cells feature a compact, standardized design, making them ideal for modular battery packs. Prismatic cells, on the other hand, offer higher energy density per unit, which suits applications requiring fewer cells.

Cylindrical cells excel in high-discharge applications like power tools and electric vehicles due to their durability and thermal management. Prismatic cells, with their larger size and fewer connections, are better suited for large-scale energy storage systems.

Tip: When choosing between these two, consider your application’s energy density and discharge rate requirements.

3.2 Cylindrical vs. Pouch Cells

Pouch cells differ from cylindrical cells in packaging and performance. While cylindrical cells use a metal casing for durability, pouch cells rely on flexible packaging, which improves space utilization but reduces mechanical stability.

Cylindrical cells are preferred for applications requiring durability and long life, such as robotics and industrial tools. Pouch cells, with their efficient packaging, are gaining popularity in consumer electronics and lightweight devices.

Note: For applications in harsh environments, cylindrical cells provide better reliability due to their robust design.

3.3 Application Suitability Across Industries

Cylindrical cells demonstrate versatility across various industries. Their standardized design and superior thermal management make them a reliable choice for demanding applications.

• Electric Vehicles: Cylindrical cells, such as the format, are widely used in electric vehicles for their high discharge rates and scalability.

• Energy Storage Systems: Grid-scale storage systems benefit from the durability and modularity of cylindrical cells.

• Consumer Electronics: Devices like laptops and power banks rely on cylindrical cells for their compact size and reliability.

• Industrial Applications: Cylindrical cells withstand mechanical stress, making them ideal for industrial tools and robotics.

• Medical Devices: Their safety features and long lifespan ensure dependable performance in critical medical applications.

Cylindrical cells continue to dominate sectors requiring robust and scalable energy solutions. For tailored battery solutions, explore our custom battery solutions.

Cylindrical cells stand out for their robust design, scalability, and efficient thermal management. Their advantages, such as high energy density and durability, make them indispensable in energy storage systems and electric vehicles. Compared to prismatic and pouch cells, cylindrical cells offer unmatched reliability for high-performance applications.

Innovations in cylindrical cell technology continue to reshape the lithium-ion battery market. By , global demand for large cylindrical batteries is expected to reach up to 235 GWh, with major manufacturers like Tesla and Panasonic driving advancements. These developments promise higher energy density, faster charging, and reduced costs, solidifying cylindrical cells as a cornerstone of future energy solutions.

For tailored cylindrical battery solutions, consult Large Power today.

FAQ

1. What are the most common cylindrical cell sizes?

The most popular sizes include (18×65 mm), (21×70 mm), and (46×80 mm). These standardized dimensions simplify integration into various devices and systems.

Tip: Choose the size based on your device’s energy and space requirements.

2. How do cylindrical cells ensure safety during operation?

Cylindrical cells feature robust casings, pressure relief valves, and current interrupt devices (CID). These mechanisms prevent overheating, overcharging, and short circuits, ensuring reliable performance.

3. Why are cylindrical cells preferred for electric vehicles?

Their modular design, high energy density, and efficient heat dissipation make them ideal for EVs. They also support scalability, enabling manufacturers to create battery packs for diverse vehicle models.

Note: Cylindrical cells like the format are revolutionizing EV battery technology.

Want more information on Cylindrical Cell? Feel free to contact us.