4s Smart Bms 12v 250a BMS Lifepo4 16s 48v For Lithium Ion Battery
Pack
HKIVI BMS lithium battery intelligent protection board is a
management system tailored for large-capacity series lithium
battery packs, with functions such as voltage acquisition,high
current active equalization, overcharge, overdischarge, overcurrent
and overtem-perature protection, coulomb counter Bluetooth
communication, GPSremote and other functions .Applicable to lithium
iron phosphate, ternary lithium and other battery types.Relying on
the energy transfer active equalization technology with independent
intellectual property rights, the protection board can achieve a
maximum continuous equalization current of 2A. The high-current
active equalization technology can ensure the consis-tency of the
battery to the greatest extent, improve the mileage of the battery,
and delay the aging of the battery.The protective board has a
supporting mobile APP, which supports ANDROID andlOS operating
systems. The APP can be connected to the protection board through
the Bluetooth of the mobile phone to check the working status of
the battery, modify various working parameters of the protection
board, control the charging and discharging switch, and so on. The
protection board is small in size, easy to operate, and full of
functions, and can be widely used in battery packs for small
sightseeing cars, scooters, shared cars, high-power energy storage,
base station backup power, and solar power stations.
| Model | BD6A20S10P | BD6A24S10P | B1A20S15P | B1A24S15P | B1A24S15P | B2A24S20P |
|---|
Number of ternary strings | 7~20 | 7~24 | 7~20 | 7~24 | 7~24 | 7~24 |
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Number of iron lithium strings | 8~20 | 8~24 | 8~24 | 8~24 | 8~24 | 8~24 |
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Number of titanic acid strings | 14 | 14~20 | 14~20 | 14~24 | 14~24 | 14~24 |
|---|
Balance method | 0.6A | 1A | 2A |
|---|
| Continuous discharge current | 100A | 150A | 200A |
|---|
| Maximum discharge current | 100A | 300A | 350A |
|---|
| Overcurrent protection (adjustable) | 10-100A adjustable | 10-150A adjustable | 10-200A adjustable |
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| Outlet mode | same port |
|---|
| Single voltage range | 1.5-5V |
|---|
| Voltage Acquisition Accuracy | +3mV |
|---|
| Overcharge protection voltage | 1.5~4.5V adjustable |
|---|
Overcharge release voltage | 1.5~4.5V adjustable |
|---|
| Overcurrent protection delay | 10~120S adjustable |
|---|
| Over-discharge protection voltage | 1.5~4.5V adjustable |
|---|
| Over-discharge recovery voltage | 1.5~4.5V adjustable |
|---|
| Number of temperature detection | 3 |
|---|
| Temperature Protection | Yes |
|---|
| Short circuit protection | Yes |
|---|
| Coulomb counter | Yes |
|---|
| Bluetooth function | support Android, Apple, HarmonyOS |
|---|
| Display interface | Yes |
|---|
| GPS interface | Yes |
|---|
| RS485 interface | Yes |
|---|
CAN interface | Optional |
|---|
Some key points of LiFePO4 battery in BMS design:
Features of LiFePO4 battery:
High safety, good thermal stability, not prone to thermal runaway
Long cycle life, up to 2000-5000 times
Good performance in low temperature environment
Relatively low energy density
Considerations for LiFePO4 battery BMS design:
Charging voltage control: The upper limit of charging voltage of
LiFePO4 battery is generally 3.65V/cell
Discharge depth control: Excessive discharge will reduce battery
life, and the discharge depth needs to be limited
Temperature monitoring and protection: LiFePO4 battery is sensitive
to temperature changes and needs to be strictly monitored
Balance strategy optimization: LiFePO4 battery is more sensitive to
capacity differences between batteries
Main functions of LiFePO4 battery BMS:
Accurately detect the voltage and temperature of each battery cell
Real-time monitoring of the total voltage, current and temperature
of the battery pack
Implement charge and discharge control according to battery
characteristics
Use active balancing technology to ensure the consistency of
battery cell status
Fault diagnosis and alarm to protect the battery from overcharge
and over discharge
LiFePO4 battery BMS Typical applications:
Electric vehicles and electric bicycles
Energy storage systems
Outdoor backup power and UPS
Power tools and electric equipment
In general, LiFePO4 batteries require more sophisticated BMS
management to fully utilize their advantages due to their unique
chemical properties. An excellent LiFePO4 battery BMS should
achieve precise control of voltage, current, and temperature, and
use active balancing technology to provide all-round safety
protection and performance optimization for the battery system.
Key points of BMS design for LiFePO4 batteries in various
application scenarios:
Electric vehicles:
The battery pack has a large capacity and a large number of single
cells, which requires complex monitoring and balancing control
Focus on driving range, high power output and safety, requiring BMS
to accurately control charging and discharging
Real-time monitoring of battery temperature is required to prevent
safety hazards caused by overheating
Energy storage system:
Large-capacity battery packs have high requirements for cost and
reliability
BMS is required to provide accurate battery status monitoring and
long-term management functions
Active balancing technology can improve battery utilization and
system efficiency
Mobile power/UPS:
Portability and reliability are key considerations
BMS must achieve accurate charging and discharging control of
batteries to prevent overcharging and over-discharging
Battery status detection and fault warning functions are required
Electric tools/equipment:
Cost and volume restrictions are large
BMS design should be as simple and efficient as possible, and
passive balancing is preferred
Basic battery protection and monitoring functions are still
required
Consumer electronics:
Cost and volume restrictions are more stringent
BMS design requires high integration and low power consumption
Passive balancing is generally used, but some high-end products
also use active balancing
LiFePO4 battery BMS The design needs to balance the characteristics
of different application scenarios to achieve the best adaptation
in terms of cost, volume, function, performance, etc. Whether it is
active or passive balancing, BMS should ensure the safe and
reliable operation of the battery pack and maximize the advantages
of LiFePO4 batteries.
There are two ways to implement the balancing function: active
balancing and passive balancing.
Both active balancing and passive balancing aim to eliminate the
inconsistency of the battery pack, but their implementation
principles are completely opposite. Here, any balance that uses
resistance to dissipate energy is called passive balance, and any
balance achieved through energy transfer is called active balance.
The inconsistency of battery cells is mainly reflected in four
aspects: SOC, internal resistance, self-discharge current, and
capacity. At present, the balancing technology of BMS is relatively
mature, and the balancing technology is mainly aimed at the SOC
level in the battery core. In an ideal world, balancing technology
balances the SOC of each cell so that all cells reach the upper and
lower voltage limits of charge and discharge simultaneously,
increasing the available capacity of the battery pack.
BMS Active and passive balance are two methods used in battery
management systems (BMS) to equalize the state of charge (SOC) or
voltage levels of individual cells within a battery pack. The goal
is to ensure that each cell operates within a desired range and
maximize the overall performance and lifespan of the battery pack.
