Overview
DALY Smart BMS (Y-series) is a smart battery management system (BMS) designed for lithium battery packs, with selectable string (series) counts and current ratings. It supports Li-ion, LiFePO4, and LTO battery types, and provides monitoring and parameter configuration through a built-in Bluetooth (BT) smart app.
Key Features
- Optional string (series) range: 4-8S / 7-17S / 7-24S
- Optional current range (Y-series): 30A / 40A / 60A / 80A / 100A / 120A
- Smart monitoring: Bluetooth function enables real-time battery data monitoring via app; app can view & set battery parameters and monitor battery information such as voltage, current, charge/discharge status, and alert
- Auto-identifies pack strings: Auto-identifies strings on first power-up only
- Protection functions (listed): Overcharge, over-discharge, overcurrent, pre-charge, short circuit, high temperature, low temperature, static electricity, offline
- Basic functions (listed): Over-charging protection, over-discharging protection, over-current protection, temperature protection, disconnect protection, short circuit protection, balance function, short circuit protection recover
- Communication: Standard communication Uart; customizable communication RS485, SIF
- PC software: PC Master supports Windows system
- Parallel current limiting: Integrated 1A parallel current limiting module
- Expandable accessories (examples listed): Display screen, WiFi module, GPS module, parallel module, buzzer, heating module, key switch, etc.
- Customization/OEM support: Bulk orders can customize functions, parameters, and logo; standard BMS and smart BMS can be customized
For BMS selection guidance, model matching, and optional accessory compatibility, contact support at https://tsolar.top/ or service@tsolar.top.
Specifications
| Series / Model family | DALY SMART BMS: Y-series 30-60A (YH), 80-120A (YK) |
| Compatible battery types | Li-ion / LiFePO4 / LTO |
| String (series) range (general) | 4-8S / 7-17S / 7-24S |
| Current range (optional) | 30A / 40A / 60A / 80A / 100A / 120A |
| Charging voltage (by cell type) | Li-ion: N x 4.2V LiFePO4: N x 3.2V LTO: N x 2.4V |
| String number range (by battery type) | Li-ion: 4-8 / 7-17 / 7-20S LiFePO4: 4-8 / 8-17 / 8-24S LTO: 6-8 / 10-17 / 10-24S |
| Operating temperature | -40~85°C |
| Working power | ≤10mA |
| Sleep current | <600uA |
| Sleep time | 3600S |
| NCT | *1 (2 ways) |
| Cell sampling voltage | 1.5-4.9V |
| Passive balance current | 100±30mA |
| Standard communication | Uart |
| Customizable communication | RS485, SIF |
Model/Hardware Parameters (as listed)
| Model | Current | Size | B-P- | Cable |
|---|---|---|---|---|
| YH | 30A / 40A / 60A | 101*65.5*14.2mm | 10AWG 100mm | 4-8S: 450mm 7-17 / 7-24S: 550mm |
| YK | 80A / 100A / 120A | 130*65.5*14.2mm | 7AWG 150mm (80A/100A) 6AWG 150mm (120A) |
550mm |
| YM | 150A / 200A | 180*92.4*17.2mm | 2AWG 200mm | 550mm |
Dimensional data tolerance range: ±0.5mm
Passive Equalization (listed)
- Balanced Start Voltage: 3.4V
- Balanced Opening Voltage Difference: ≥20mV
- Balance Current: 100±30mV
-
Balanced start conditions:
1) Reach the set balanced start voltage
2) The highest voltage reaches the set balanced start voltage difference.
What’s Included
- BMS *1pcs
- Sampling cable *1pcs
- Temperature probe (NTC) *1pcs
- B+ cable *1pcs
- English manual *1pcs
- USB-Uart cable *1pcs
Optional Accessories / Customization (listed)
- UART to USB cable
- Battery Capacity Indicator
- Touch screen LCD
- Soft switch
- Key switch
- RS485 and CAN communication
- DO/I port for special needs
Note: Optional accessories and customized accessories must match the BMS model and be purchased at the same time.
Applications
- RV energy storage
- Photovoltaic energy storage
- Home and outdoor energy storage
- Electric vehicles
- Tricycles
- Forklifts
- Tourist vehicles
- Golf cart
Installation Notes (Wiring & Checks)
- Preparation: Find the total positive and total negative of the battery pack; find B-/P- of BMS; insert temperature probe (NTC) into the BMS.
- Welding note: When soldering, the balance cable cannot be inserted into the BMS.
- (1) Weld sampling cables: start from thin black wire to B- (total negative), then connect each cell's positive in order. Last red wire to B+ (total positive). Do not plug into BMS during welding. Insulate unused wires.
- (2) Check voltages: use multimeter or wire tester to confirm each cell's voltage is normal. Fix any miswiring or poor soldering.
- (3) Weld output wires: secure B- and P- to BMS with 10N·m torque; weld B- to battery negative. Insulate P- before final connection.
- (4) Plug NTC and sampling cable: insert NTC, then plug sampling cable to auto-activate BMS.
- Voltage measurement: Measure whether the battery voltage (B+→B-) is consistent with the output voltage of the BMS (B+ P-). If the two voltage values are equal, the BMS is working normally.
Selection Notes
- Battery type matching: BMS type and lithium battery type must be in one-to-one correspondence (Li-ion/LiFePO4). Mismatch may cause BMS damage and the battery cannot be fully charged and discharged.
- String matching: BMS strings and battery strings must be in one-to-one correspondence. Mismatch may cause BMS and battery burn out.
- Selection method (formula): load maximum power ÷ (string number of battery × overdischarge voltage) × coefficient
- Depending on the battery usage scenario, the coefficient value is also different.
Details
Backed by DALY’s long-term R&D focus and large-scale manufacturing experience.
Choose with confidence thanks to international compliance marks and streamlined factory-direct supply.
DALY Smart BMS (Y-series) supports multiple cell chemistries and flexible series counts for one-pack-to-many builds.
Smart features include first-power-up string auto-detection, Bluetooth app monitoring, and expansion for RS485 communication.
Select the right model by matching current rating, wiring size, and supported string range for your battery type.
Core specs cover wide operating temperature, UART standard communication, optional RS485/SIF, and built-in protection functions.
Designed to fit a wide range of lithium battery pack formats and common mobility and power applications.
One BMS platform approach simplifies model selection across multiple builds.
Flexible series-count options make it easier to standardize inventory while supporting different pack configurations.
On first power-up, the BMS can automatically identify the pack string count for faster setup.
Use the built-in Bluetooth app to monitor real-time battery data and adjust key parameters when needed.
A compact, sealed housing design supports reliable operation in higher-current applications.
Optional accessories and communication choices enable system expansion as requirements grow.
Expand beyond UART with optional modules such as displays, WiFi, GPS, and customized RS485 connections.
Optional cloud connectivity supports remote battery monitoring and centralized management for multiple packs.
Add the optional WiFi module when remote management via the cloud platform is required.
Choose from multiple display styles, including compact 3-inch units and a larger 4.3-inch touch screen.
