Battery Cell
Best Battery Cell In China

What are the common battery cells?

The battery cells are mainly made of LFP and NMC materials and contain both round and prismatic cells.

LFP and NMC round cells are mainly differentiated into popular cell sizes such as 14500, 18650, 21700, 26650, 32650, etc. These cells can be used to form Lithium Iron Phosphate and Lithium Manganese Nickel batteries. These cells can form Lithium Iron Phosphate (LFP) and Lithium Manganese Nickel (LMN) batteries.

LFP (Lithium Iron Phosphate) batteries are known for their superior safety, long life cycle, and stability, and are the preferred choice for energy storage applications that require rugged reliability. Compared to NMC (Nickel Manganese Cobalt) batteries, LFP batteries are more thermally stable and safer, with less risk of overheating and thermal runaway.

NMC (Nickel Manganese Cobalt) batteries typically have higher energy density and can store more energy in a smaller size, making them suitable for applications with high space and weight requirements, while LFP batteries have a longer lifespan and a more environmentally friendly composition.LFPs have a lower self-discharge rate and a wider range of operating temperatures, making them better suited for long-term and various environmental applications.

Therefore, when choosing between LFP and NMC batteries, if you prioritize energy density then NMC cells are your first choice, if you consider safety and service life then choose lithium iron phosphate cells!

What is a power cell?

A battery cell refers to a single electrochemical cell containing positive and negative electrodes, which are generally not used directly. The difference is that batteries contain protective circuitry and casing and can be used directly. The composition of a battery is like this: cell + protective circuit board. The battery with the protective circuit board removed is the battery cell.

What are the battery cell materials?

Anode materials include lithium iron phosphate, ternary materials, lithium manganate, lithium nickelate, lithium cobaltate, and so on.
Negative electrode materials include graphite materials, carbon materials, lithium carbonate, silicon carbon negative electrode, etc.
The electrolyte includes a solvent, additives, and a lithium salt.
Other auxiliary materials include binder, dispersant, aluminum-plastic film, conductive agent, copper foil, aluminum foil, and so on.

What are the cell type?

It contains a polymer combined lithium battery, lithium ternary battery, lithium iron battery, and so on. Common cylinder models are 32650, 26650, 18650, 21700, 14500, 14250, 18490, etc.
Square battery cell
Soft pack battery cell

What are the advantages and disadvantages of the three types of batteries?
  • Square cell
    High packaging reliability, high system energy efficiency, high energy density, relatively simple structure, convenient capacity expansion, and relatively good stability.
    Difficult to unify the process, low automation level, and high variability of the single unit.
  • Round cell
    Mature process, low PACK cost, high battery product yield and consistency of the battery pack, large heat dissipation area of the battery pack.
    Difficulty in heat dissipation design after formation, low energy density.
  • Soft pack type battery cell
    Good safety, lightweight, high mass-specific energy, low internal resistance, longer cycle life.
    Low degree of automation, low production efficiency, high cost, poor consistency.
What is meant by A, B and C batteries?
  • A-grade battery cells: Factory-made and directly supplied batteries (these batteries are usually hard to get into the market)
  • B-grade batteries: Products will have defective rates, capacity, and voltage are usually low.
  • C-grade batteries: C-grade cells are mainly B-grade cells sitting idle in warehouses.
Which is better, lithium ternary battery cell or lithium iron phosphate battery cell?
  • Ternary battery cell
    Low temperature resistance, small size, high energy density, low self-discharge rate, high energy conversion rate, high performance, high stability, and high reliability.
  • Lithium iron phosphate battery cell
    Good safety, long cycle life, low production cost, better charging efficiency
What is the approximate capacity of each type of round battery cell?

The capacity of common 18650 cells is usually: INR18650 2400mAh, 2800mAh, 3350mAh, 2600mah, 2900mah, 3500mah, 2500mah, 3000mah, 3800mah and so on.
The common 20650 cell capacity is 3350mAh, 32140 cell is 15ah, 46800 cell is 25ah, 21700 cell is 5ah and 6ah.

What is the voltage at for each type of cell?
  • LFP: Nominal voltage is 3.2V
  • NMC: Nominal voltage is 3.6 – 3.7V
What is the difference between a battery cell and a battery?

A battery cell is a single electrochemical cell containing positive and negative electrodes and is not normally used directly.
Battery refers to a cup, tank, or other container or part of the space of a composite container containing an electrolyte solution and metal electrodes for the emergence of an electric current, a device capable of converting chemical energy into electrical energy.

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