Overview
The DALY Smart BMS (Y-series 30–60A, model YH) is a smart battery management system for lithium battery packs, with built-in Bluetooth for real-time monitoring and parameter viewing/setting via an app. It supports multiple battery types (Li-ion, LiFePO4, LTO) and a wide string range (4S–24S, depending on battery chemistry and configuration). It is intended for applications such as RV energy storage, photovoltaic energy storage, home and outdoor energy storage, electric vehicles, tricycles, forklifts, tourist vehicles, and golf carts.
Key Features
- Built-in Bluetooth + Smart App: Monitor battery information in real time and view/set battery parameters (voltage, current, charge/discharge status, alerts, etc.).
- Auto-identifies pack strings: Auto-identifies strings on first power-up only.
- Protection functions: 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.
- Multi-channel communication / expansion: Standard communication: Uart. Customizable communication: RS485, SIF. RS485 connection to inverter (customized) and RS485 connection to EV controller (customized) are indicated.
- Integrated parallel current limiting: Integrated 1A parallel current limiting module.
- PC software: PC Master supports Windows system.
- Component design notes: Uses high-quality microelectronic components (precise and fast IC; low resistance, high withstand voltage MOSFET). Thermal silica is indicated for improved heat dissipation. Preset interface and buckle cable are indicated for convenient connection.
Specifications
| Series / Model | DALY SMART BMS: Y-series 30–60A (YH) |
| Optional current range | 30A / 40A / 60A |
| Optional strings range (general) | 4–8S / 7–17S / 7–24S |
| Battery type | Li-ion / LiFePO4 / LTO |
| 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 |
| Charging voltage | N x 4.2V (Li-ion) / N x 3.2V (LiFePO4) / N x 2.4V (LTO) |
| Operating temperature | -40~85°C |
| Working power | ≤10mA |
| Sleep current | <600uA |
| Sleep time | 3600S |
| Cell sampling voltage | 1.5~4.9V |
| Passive balance current | 100±30mA |
| Passive equalization (balanced start voltage) | 3.4V |
| Passive equalization (balanced opening voltage difference) | ≥20mV |
| Standard communication | Uart |
| Customizable communication | RS485, SIF |
| Parallel current limiting | Integrated 1A parallel current limiting module |
| Bluetooth | Built-in Bluetooth; supports Android/iOS/HarmonyOS |
| PC Master | Support Windows system |
| NTC | *1 (2 ways) |
| YH size | 101*65.5*14.2mm |
| YH B-P- cable | 10AWG 100mm |
| YH balance/sampling cable length | 4–8S: 450mm; 7–17 / 7–24S: 550mm |
| Dimensional tolerance | ±0.5mm |
What’s Included
- BMS x 1 pcs
- Sampling cable x 1 pcs
- Temperature probe (NTC) x 1 pcs
- B+ cable x 1 pcs
- English manual x 1 pcs
- USB-Uart cable x 1 pcs
Optional Accessories / Customization
- Optional accessories: UART to USB cable; Battery Capacity Indicator; Touch screen LCD
- Customization items listed: soft switch; RS485 and CAN communication; key switch; DO/I port for special needs
- Note: Optional accessories and customized accessories must match the BMS model and be purchased at the same time.
For accessory matching, model selection, and bulk/OEM customization (functions, parameters, logo), contact customer service at https://tsolar.top/ or service@tsolar.top.
Applications
- RV energy storage
- Photovoltaic energy storage
- Home and outdoor energy storage
- Electric vehicles, tricycles
- Forklifts
- Tourist vehicles, golf carts
Installation / Wiring Notes
- 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, it means that the BMS is working normally.
Passive Equalization Conditions
- Balanced start when both conditions are met: (1) Reach the set balanced start voltage; (2) The highest voltage reaches the set balanced start voltage difference.
Details
Built on DALY’s long-term R&D focus and global manufacturing scale for consistent BMS performance.
International certifications and factory-direct logistics help support reliable sourcing for OEM and DIY builds.
DALY Smart BMS (Y Series) supports multiple string ranges and lithium chemistries for wide pack compatibility.
Bluetooth monitoring, auto string identification on first power-up, and optional communications bring smarter pack control.
Choose the current rating and model size that matches your build; the table summarizes key physical parameters.
Core specs include -40 to 85°C operation, passive balancing, UART communication, and a full set of safety protections.
Designed for common lithium pack formats and applications ranging from light EVs to RV and energy storage systems.
Wide string support helps cover Li-ion, LiFePO4, and LTO configurations across typical 4S–24S builds.
String detection runs on the first activation to simplify initial setup for the selected pack configuration.
Use the app to check real-time status and adjust key battery parameters from a phone via built-in Bluetooth.
An internal board-and-case design built for higher current handling and stable operation under load.
Expansion options can include displays, WiFi, GPS, and customized RS485 connections for inverters or controllers.
Optional cloud connectivity supports remote monitoring and management when paired with DALY WiFi/BT accessories.
Add the optional WiFi module to enable cloud storage, bulk management, and remote firmware updates.
Multiple display accessories are available to match different installations, from compact indicators to touch screens.
DALY Smart BMS is designed for lower power consumption, with working power rated at ≤10mA and sleeping current under 600uA.
DALY Smart BMS integrates parallel protection to help reduce high-current impact when expanding battery packs in parallel.
DALY Smart BMS package includes the BMS module, manual, DIO cable (300mm), sampling cable, NTC sensor lead, B+ line, output line, screws, and packing box.
DALY Smart BMS wiring guidance outlines the B+ and B- main leads, P- output, and the 4–8S balance/sampling plug sequence for connecting a load and charger.
DALY Smart BMS wiring diagrams map the balance leads and main B+ and B- connections for load and charger setups on 7–17S and 7–24S battery packs.
DALY Smart BMS branding highlights the Mini-Black BMS in the Tsolar Y Series lineup.
DALY Smart BMS supports customizable app, PC, and cloud management, with optional Bluetooth/WiFi hardware and branding customization.
DALY emphasizes its R&D resources, noting eight major R&D centers and a team of over 100 research and development engineers.
DALY’s intelligent production base is described as 20,000 m² with annual capacity over 20 million BMS units and daily output up to 30,000 units.
DALY Smart BMS orders include clear guidance on delivery time, logistics options, warranty terms, and product data notes.
