51.2V 40AH RGV power battery design scheme

According to the customer's needs and specifications (the power requirements of the rail car), and the actual daily mileage of 30-40 kilometers and the use of low-temperature -20 degrees of environmental discharge, the specification of 51.2V/40AH. In terms of battery cells, the long-life ternary lithium battery of domestic first-line brands is used, and the relevant parameters of customers are realized with 14 series 8 and combination. In terms of lithium battery protection circuit protection, 14 series hardware protection circuit +14 series charge balance circuit + temperature protection circuit is used to achieve the maximum overcurrent of the finished lithium battery of 150A and continuous discharge current of 60A. Lithium protection: short circuit protection, overcharge protection, overdischarge protection, overcurrent protection, temperature protection, balance and so on.

RGV power battery design scheme:

1) Protection board (PCM) : mainly for the rechargeable lithium battery pack design of the protection line, due to the chemical characteristics of the lithium battery itself, need to provide overcharge, overdischarge, short circuit, overcurrent, temperature and other protection functions to avoid causing combustion, explosion and other dangers.
2) Protection IC (Protection IC) : The main protection function chip of the design scheme, which monitors the functions of overcharge, overdischarge, overcurrent, short circuit and so on. Make the cell work in a safe, stable and efficient range.
3) Temperature switch: mainly designed for temperature protection function. When the temperature of the battery itself reaches 75 degrees due to other abnormal problems, the temperature switch acts to achieve overtemperature protection, and automatically recovers when the temperature drops.
5) 26650 lithium-ion battery / 26650/5000mah /3.6V (automotive grade battery).
6) Field effect tube (MOSFET) : MOSFET tube, which plays a switching role in the protection circuit, and always makes the voltage at both ends of the load neither rise nor decrease to ensure voltage stability.

Product parameters:

Nominal voltage: 51.2V
Nominal capacity: 40AH
Battery size: 371*269*146mm
Battery internal resistance: ≤50mΩ
Battery weight: 16KG
Charging current: less than or equal to 15A
Continuous discharge current: less than or equal to 60A
Protection current: 150A standard
Charging voltage: 58.8V
Discharge cut-off voltage: 39.2V
Service life: ≥500 times
Charging temperature: 0 ~ 45℃
Discharge temperature: -20 ~ 60 ℃
Storage temperature: -20 ~ 35 ℃
Battery temperature protection: 70℃±5℃

Main features:

1, the battery pack is safe, good low temperature performance, long cycle life.
2, the battery pack cycle life is high, in line with low carbon, energy saving, environmental protection value concept.
3, the battery built-in BMS system, with multiple protection functions, the protection system (PCM/BMS) all adopt the most advanced chips and MOS in Japan and the United States. With equilibrium.
4, battery material Li-Ni-Co-Mn-O (ternary material), LiFePO4 (lithium iron) is available.
5, can choose domestic brand-name battery as a combination unit to ensure the consistency, stability and safety of the battery pack.
6, can be multi-string combination and battery modular design.
7. The battery has built-in temperature protection.
8. Waterproof rating: IP65