DALY Smart BMS Y Series 4S-24S 30A-200A Built-in Bluetooth 3-inch LCD for Li-ion LiFePO4 LTO

Overview

The DALY Smart BMS (Y Series / Mini-Black BMS) is a smart battery management system for Li-ion, LiFePO4, and LTO battery packs, with built-in Bluetooth and support for a 3-inch LCD display option. It supports multiple string ranges (4S-8S, 7S-17S, 7S-24S) and multiple current options (30A-200A) to match different battery pack configurations and load requirements.

Key Features

• Smart compatible strings: One BMS for multiple pack string ranges: 4-8S / 7-17S / 7-24S
• Wide current range: 30A-200A (optional selections)
• Battery types supported: Li-ion / LiFePO4 / LTO (BMS type and battery type must be one-to-one correspondence)
• Built-in Bluetooth + Smart APP: Monitor battery information such as voltage, current, charge and discharge status, and alerts; view/set battery parameters
• Auto-identifies pack strings: Auto-identifies strings on first power-up only
• PACKs parallel support: “PACKs Any Parallel”
• Auto-balancing: Auto-balancing of voltage difference (passive equalization)
• Communication: Standard communication Uart; customizable communication RS485, SIF; RS485 to inverter (customized) and RS485 to EV controller (customized)
• PC software: PC Master supports Windows system
• Bluetooth platform support: Support Android/iOS/HarmonyOS
• Integrated parallel current limiting: Integrated 1A parallel current limiting module
• Protection functions: Overcharge, over-discharge, overcurrent, pre-charge, short circuit, high temperature, low temperature, static electricity, offline
• Components (as stated): Precise and fast IC; low resistance, high withstand voltage MOSFET; thermal silica for heat dissipation; preset interface and buckle cable for convenient connection

Specifications

Model-based mechanical parameters

Passive Equalization (as provided)

• Balanced Start Voltage: 3.4V
• Balanced Opening Voltage Difference: 20mV
• Balance Current: 10030mV
• Balanced start conditions: (1) Reach the set balanced start voltage; (2) The highest voltage reaches the set balanced start voltage difference.

Whats 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

• UART to USB cable
• Battery Capacity Indicator
• Touch screen LCD
• Soft switch
• Key switch
• RS485 and CAN Communication
• DO/I port for special needs

Optional accessories and customized accessories must match the BMS model and be purchased at the same time. For customization (functions, parameters, logo, OEM) or to confirm the correct model selection, 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 cart

Installation Notes (Balance Cable Connection)

• 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). Note: 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 10Nm torque; weld B- to battery negative. Note: 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.

Selection Guidance / Attention

• BMS type and lithium battery type must be in one-to-one correspondence (Li-ion/LiFePO4). Mismatch may cause: (1) BMS damaged, even BMS and battery burn out; (2) The battery cannot be fully charged and discharged.
• BMS strings and battery strings must be in one-to-one correspondence; mismatch may cause BMS and battery burn out.
• Selection method (as provided): load maximum power (string number of battery overdischarge voltage) coefficient.
• Depending on the battery usage scenario, the coefficient value is also different.

Brand / Compliance Marks (as shown)

• DALY BMS
• CE, RoHS

Details

DALY BMS emphasizes long-term R&D investment and a mature manufacturing background for BMS development.

International compliance markings and factory-direct fulfillment support streamlined sourcing for projects.

DALY Smart BMS is designed to cover multiple series-string ranges and current options for flexible pack builds.

Smart monitoring, auto string identification on first power-up, and parallel pack support help simplify system setup.

Use the parameter table to match the correct model size, wiring, and series-string range to your battery chemistry.

Key electrical specs and protection functions are summarized for quick compatibility checks.

Suitable for a wide range of lithium battery pack applications, from light EVs to utility and energy storage uses.

Choose the correct string range for Li-ion, LiFePO4, or LTO packs to cover builds from 4S up to 24S.

Automatic string detection on first power-up helps reduce setup time when configuring different pack series counts.

Built-in Bluetooth connects to the smart app for live status, parameter viewing, and alert monitoring.

A compact metal housing and component layout are designed for stable operation under higher current loads.

UART comes standard, with optional expansion paths for displays, WiFi/GPS modules, and customized RS485 communication.

Optional cloud connectivity enables remote fleet-style monitoring when paired with supported communication hardware.

Add the optional WiFi module for cloud-based data access and remote management capabilities.

Multiple display and indicator accessories are available to fit different installation styles and interfaces.

DALY Smart BMS is rated for low power draw with working power ≤10 mA and sleeping current under 600 µA.

DALY Smart BMS supports parallel-connected battery packs with integrated protection to help reduce high-current impact during expansion.

The DALY Smart BMS package includes the BMS unit, manual, DIO cable (300mm), sampling cable, NTC sensor lead, screws, and B+ and B-P- wiring leads.

DALY Smart BMS wiring instructions outline the sampling lead order (B- to B+) and the load/charger connections for 4–8S battery packs.

DALY Smart BMS wiring uses labeled B+ and B- main terminals plus numbered balance leads, NTC sensor, charger, and load connections for 7–17S or 7–24S battery packs.

Mini-Black BMS branding for the Tsolar Y Series is presented on a red promotional banner.

DALY Smart BMS support includes customizable app, PC master, and cloud manager options with Bluetooth/WiFi software and hardware integration.

DALY Smart BMS is backed by an R&D-focused development team, reflecting ongoing work on battery management technology.

DALY highlights its smart manufacturing production process, including an intelligent 20,000 m² base and high-volume BMS output capacity.

Orders typically ship within 3–7 days, include flexible logistics options, and come with a one-year warranty under normal use.