Smart BMS with RS485 Communication for E-bike

FY•X, a renowned manufacturer in China, proudly presents a state-of-the-art lineup of smart Battery Management Systems (BMS) designed specifically for E-bikes. Explore our comprehensive range, which includes the high-performance Smart BMS with RS485 Communication for E-bike. As dedicated manufacturers committed to pushing technological boundaries, FY•X ensures that these smart BMS units stand out for their innovation, providing E-bike enthusiasts with unparalleled power management solutions. Choose FY•X for cutting-edge technology and reliable BMS solutions, enhancing your E-bike experience to new heights.

FY•X high quality Smart BMS with RS485 Communication for E-bike Application scope

This product is a protective board solution specially designed by Wenhong Technology Company for power supply 13-14 string battery packs. It is suitable for lithium batteries with different chemical properties and different numbers of strings, such as lithium ion, lithium polymer, lithium iron phosphate, etc.

BMS has two communication interfaces, RS485 and CAN (choose one of the two), which can be used to set various protection voltage, current, temperature and other parameters, and is very flexible. The maximum sustainable discharge current can reach 80A. The protection board has LED power indicator and system operation indicator light, which can conveniently display various statuses.

Functional characteristics

● 13 batteries are protected in series.

● Charging and discharging voltage, current, temperature and other protection functions.

● Output short circuit protection function.

●Two-channel battery temperature, BMS ambient temperature, FET temperature detection and protection.

● Passive balancing function.

● Accurate SOC calculation and real-time estimation.

● Protection parameters can be adjusted through the host computer.

● Can communication can monitor battery pack information through the host computer or other instruments.

● Multiple sleep modes and wake-up methods.

Physical reference picture

Figure 1: Real picture of the front of the BMS

Figure 2: Real picture of the back of BMS

Electrical Characteristic (Ta = 25 ℃.)

Note: Different chips, the corresponding power consumption is different;

The main parameter types and functions of the power part are explained as follows:

Design Capacity: The design capacity of the battery pack (for this product, this value is set to 30000mAH)

Cycle Capacity: Only the discharge process is measured. Whenever the accumulated discharged power reaches this value, the number of cycles will be automatically increased by one, the register will be cleared, and the next measurement will be restarted. (This product is set to 24000mAH)

Actual capacity (Full Chg Capacity): The actual capacity of the battery pack, that is, the value saved inside the BMS after power learning, will be updated to the actual capacity value of the battery as the battery is used. The initial value setting here is the same as the design capacity. (For this product, this value is set to 30000mAH)

Full Charge Voltage: During the charging process, only when (the voltage obtained by dividing the total voltage by the number of battery strings – Taper Voltage Margin) is greater than this voltage, and the charging current is less than the charging end current for a certain period of time (i.e. Taper Timer) Only then does the chip consider the battery to be fully charged. (This product is set to 4100mV)

Charging end current (Taper Current): During the charging process, the voltage obtained by dividing the total voltage of the battery pack by the number of battery strings is greater than the full voltage.

After the voltage and the charging current gradually decrease to less than this charging end current, the chip considers that the battery is fully charged (this value is set to 1000mA for this product)

EDV2: When the battery pack is discharging, if the total voltage of the battery pack divided by the number of battery strings is less than EDV2, the chip will stop this capacity meter at this time.

number. (This product is set to 3440mV)

EDV0: When the battery pack is discharging, when the total voltage of the battery pack divided by the number of battery strings is less than EDV0, the chip determines that the battery pack has

Completely discharge the battery. (For this product, this value is set to 3200mV)

Self-discharge rate: the self-discharge capacity compensation value of the battery when it is at rest. The chip will compensate the self-discharge and maintenance of the battery pack when the battery is at rest based on this value.

The power consumption reduced by the shield itself. (This product is set to 0.2%/day)

BMS block diagram

Figure 7: Protection schematic diagram

PCB and size structure diagram

Figure 8: Dimensions 155*92 Unit: mm Tolerance: ±0.5mm

Protection plate thickness: less than 15mm (including components)

Port Definition

Figure 9: Wiring diagram of the protection board

Port definition:

Figure 10: Battery connection sequence diagram