The 36V 18Ah (12S3P) LIFEPO4 32650 LFP cell rechargeable battery is a Lithium Iron Phosphate (LiFePO4) battery pack designed for applications that demand dependable and durable power, commonly found in electric bicycles (e-bikes) and similar electric devices. Here’s a comprehensive look at its technical specifications:
Voltage and Capacity:
- Nominal Voltage: 36 Volts (V) – This is the standard operating voltage at which the battery delivers power.
- Capacity: 18 Ampere-hours (Ah) – This signifies the total amount of electrical charge the battery can store. Analogy-wise, it represents the runtime the battery can provide while supplying current at a specific rate.
Cell Configuration (12S3P):
- Unveiling the battery’s internal structure, the notation 12S2P describes how the individual Lithium-ion cells are organized within the pack:
- 12S: This indicates that there are 12 cells connected in series. By connecting cells in series, we essentially add their voltages. In this case, it becomes 12 cells * 3.2 V/cell (nominal voltage of a LiFePO4 cell) = 38.4 V. However, a slight tolerance difference between cells and manufacturing variations might result in a voltage slightly above or below 38.4 V.
- 3P: This represents 2 groups of cells wired in parallel. Connecting cells in parallel increases the total capacity of the pack. Assuming each cell has a capacity of 6 Ah, the combined capacity becomes 2 groups * 6 Ah/group = 12 Ah.
Battery Chemistry: LiFePO4 32650 LFP cell (Lithium Iron Phosphate)
- As the name suggests, LiFePO4 batteries are a sub-type of Lithium-ion batteries known for their exceptional safety, stability, and extended lifespan. While they boast a lower energy density compared to some other Lithium-ion varieties, LiFePO4 batteries excel in thermal stability and demonstrate high tolerance against misuse. This translates to a battery that’s less susceptible to overheating and potential fire hazards.
Additional Benefits:
- Minimal Maintenance: Unlike lead-acid batteries that require periodic maintenance like topping up electrolytes, LiFePO4 batteries are virtually maintenance-free.
- Extended Lifespan: An attractive feature of LiFePO4 batteries is their impressive lifespan, typically lasting 10 years or 3000 charge cycles, whichever comes first. This translates to fewer battery replacements and overall cost savings.
- Built-in Battery Management System (BMS): A crucial component within the battery pack, the BMS is an electronic circuit that safeguards the battery from operational extremes. It prevents over-charging, over-discharging, over-current draw, and overheating, ensuring the battery’s safety and maximizing its lifespan.
- Lightweight Champion: Compared to lead-acid batteries of similar capacity, LiFePO4 batteries are significantly lighter. This weight reduction is a major advantage in electric vehicles and other applications where weight minimization is crucial for performance and efficiency.
In conclusion, a 36V 18Ah (12S3P) LiFePO4 battery offers a compelling combination of reliability, safety, and longevity. If you prioritize a dependable and long-lasting power source for your electric vehicle or other application, this type of battery is an excellent choice. Remember to always refer to the manufacturer’s specifications for specific details and ensure compatibility with your device before making a purchase.
