32S 118.4V 15A Lithium Ion Battery Pack for E-Unicycles

This FY•X high quality 32S 118.4V 15A Lithium Ion Battery Pack for E-Unicycles is a protective board solution specially designed by Huizhou Feiyu New Energy Technology Co., Ltd. for 32-string battery packs in power supplies. It is suitable for lithium batteries with different chemical properties and different numbers of strings, such as lithium ion, lithium polymer, and iron phosphate. Lithium etc.

BMS has an RS485 communication interface, which can be used for firmware upgrades. There is an internal UART communication interface, which can directly set various protection voltage, current, temperature and other parameters through the host computer, which is very flexible.The maximum sustainable discharge current of the protection board can reach 15A, and SOC is accurately calculated and estimated in real time.

FY•X high quality 32S 118.4V 15A Lithium Ion Battery Pack for E-Unicycles Functional characteristics

● 32 batteries are protected in series.

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

● Output short circuit protection function.

● Four-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.

● RS485 communication can monitor battery pack information through the host computer or other instruments.

● Multiple sleep modes and wake-up methods.

Physical reference picture

BMS front view

Physical picture of the back of BMS

Electrical Characteristic (Ta = 25 ℃and standard atmospheric pressure.)

The above parameters are recommended values and users can modify them according to actual applications.

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 4900mAH)

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 3920mAH)

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. (This product is set to 4900mAH)

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 4120mV)

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 200mA 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 value is set to 3015mV for this product)

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. (This product is set to 2800mV)

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 0.5%/day)

BMS principle block diagram

Protection principle block diagram

PCB and dimensional structure diagram

Motherboard top-level wiring diagram                      

Motherboard bottom wiring diagram

Dimensions 369.65*68.8 Unit: mm Tolerance: ±0.5mm

Protection board thickness: less than 8mm (including components)      

Port Definition

Protection board wiring diagram

Port definition description:

Schematic diagram of battery connection sequence

Precautions for connecting the protective board and the battery core

Warning: When connecting the protective plate to the battery pack or removing the protective plate from the battery pack, the following connection sequence and regulations must be followed; if not done in the required order, the components of the protective plate will be damaged, resulting in the protective plate being unable to protect the battery. core, causing serious consequences.

Preparation: As shown in Figure 11, connect the corresponding voltage detection nickel piece to the corresponding battery cell. Please pay attention to the order in which the sockets are marked.

Steps to install protective board:

Step 1: Solder the P-\C-\A\B\ID\ONF\C+\P+ lines to the corresponding pads of the protection board without connecting the charger and load;

Step 2: Connect the negative pole of the battery pack to B- of the protection board;

Step 3: Connect the battery pack B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, B16, B17, B18, B19, B20, B21, B22, B23, B24, B25, B26, B27, B28, B29, B30, B31 to the corresponding pads of the protection board;

Step 4: Connect the positive terminal of the battery pack to B+ of the protection board;

Step 5: Charge and activate.

Steps to remove the protective plate:

Step 1: Disconnect all chargers\loads

Step 2: Remove battery pack B+;

Step 3: Remove the nickel plates connected to battery packs B31, B30, B29...B2, and B1 in sequence;

Step 4: Remove the nickel piece connecting the negative electrode of the battery pack from the B-pad of the protective plate

Additional notes: Please clean the solder joints after wire welding to ensure that there is no rosin or dirt residue around or between the solder joints;

Please pay attention to the protection against static electricity during production operations.

BOM list of main components

Ordering information

1 Huizhou Feiyu New Energy Technology Co., Ltd. logo;

2 Protection board model - (This protection board model is Fish32S001, other types of protection boards are marked, there is no limit to the number of characters in this item)

3. The number of battery strings supported by the required protection board - (this model of protection board is suitable for 32S battery packs);

4 Charging current value - 5A means the maximum support for continuous 5A charging;

5 Discharge current value - 15A means maximum support for continuous charging of 15A;

6. Balance resistance size - fill in the value directly, for example, 200R, then the balance resistance is 200 ohms;

7 Battery type - one digit, the specific serial number indicates the battery type as follows;

8 Communication method - one letter represents a communication method, I represents IIC communication, U represents UART communication, R represents RS485 communication, C represents CAN communication, H represents HDQ communication, S represents RS232 communication, 0 represents no communication, this product UC stands for UART+CAN dual communication;

9 Hardware version - V1.4 means the hardware version is version 1.4.

The model number of this protection board is: FY-Fish32S001-32S-2A-15A-200R-4-UR-V1.4. Please place the order according to this model number when placing bulk orders.

Also note:

1. When performing charge and discharge tests on the battery pack with the protective board installed, please do not use a battery aging cabinet to measure the voltage of each cell in the battery pack, otherwise the protective board and battery may be damaged.

2. This protection board does not have a 0V charging function. Once the battery reaches 0V, the battery performance will be seriously degraded and may even be damaged. In order not to damage the battery, users need to charge it regularly to replenish the power when not in use for a long time; while in use After being discharged, it must be charged in time within 12 hours to prevent the battery from being discharged to 0V due to self-consumption. Customers are required to have an obvious sign on the battery casing that the user regularly maintains the battery.

3. This protection board does not have reverse charging protection function. If the polarity of the charger is reversed, the protection board may be damaged.

4. This protective board shall not be used in medical products or products that may affect personal safety.

5. Our company will not be responsible for any accidents caused by the above reasons during the production, storage, transportation and use of the product.

6. This specification is a performance confirmation standard. If the performance required by this specification is met, our company will change the model or brand of some materials according to the order materials without further notification.

7. The short-circuit protection function of this management system is suitable for a variety of application scenarios, but it does not guarantee that it can be short-circuited under any conditions. When the total internal resistance of the battery pack and short-circuit loop is less than 40mΩ, the battery pack capacity exceeds the rated value by 20%, the short-circuit current exceeds 1500A, the inductance of the short-circuit loop is very large, or the total length of the short-circuited wire is very long, please test by yourself to determine whether This management system can be used.

8. When welding battery leads, there must be no wrong connection or reverse connection. If it is indeed connected incorrectly, the circuit board may be damaged and needs to be retested before it can be used.

9. During assembly, the management system should not directly contact the surface of the battery core to avoid damaging the circuit board. The assembly must be firm and reliable.

10. During use, be careful not to touch the lead tips, soldering iron, solder, etc. on the components on the circuit board, otherwise the circuit board may be damaged.

Pay attention to anti-static, moisture-proof, waterproof, etc. during use.

11. Please follow the design parameters and usage conditions during use, and the values in this specification must not be exceeded, otherwise the management system may be damaged. After assembling the battery pack and management system, if you find no voltage output or failure to charge when you power on for the first time, please check whether the wiring is correct.

Note: After your company receives the prototype and specifications, please reply promptly. If there is no reply within 7 days, our company will regard your company as having recognized the specifications and send the prototype. If your order exceeds 50 PCS, you need to sign back the acknowledgment letter. If you do not sign back, our company will also regard your company as having approved this specification and send the sample machine. The pictures in the specification are of general models and may be slightly different from the sample delivered. Huizhou Feiyu New Energy Technology Co., Ltd. reserves the right of final interpretation of this specification.