Overview
DALY SMART BMS is a smart battery management system (BMS) for Li-ion and LiFePO4 battery packs. It supports 3~24S and 40A~500A, and provides communication interfaces including CAN, RS485, and dual UART for monitoring and management via mobile app and PC software.
Key Features
- Supported battery types: Li-ion / LiFePO4
- Series range: 3~24S
- Current range: 40A~500A (model dependent)
- Communication & expansion: CAN, RS485, dual UART; multiple expansion function ports
- APP & PC management: “SMART BMS” APP supports data visible at a glance: SOC, voltage, electric current, temperature, alarm, cycle number, etc.
- APP compatibility: iOS and Android systems; supports 7 languages (automatically switches with the system language); supports local remote monitoring
- Remote/cloud platform: DALY Cloud (Lithium Battery IOT Platform) supports remote and batch intelligent management; battery data saved in the cloud; multi-level sub-accounts; BMS can be remotely upgraded through the APP + DALY Cloud
- Parallel connection support: Supports parallel connection of various battery packs and safe expansion (integrated parallel module to avoid large current impacts when battery packs are connected in parallel)
- Pre-charge: High-power pre-charging helps avoid false triggering at startup and unsuccessful power-ups
- Passive balancing: 100 mA passive balancing (balancing efficiency stated as increased by more than 3 times vs conventional BMS with 30 mA passive balancing)
- Core protections (listed): overcharge protection, over-discharge protection, over-current protection, short-circuit protection, waterproof, anti-vibration, temperature protection, electrostatic protection
- Build/upgrade notes shown: Waterproof (plastic injection + socket process upgrade); smaller size; lower temperature rise; less power consumption
Accessory note shown: Bluetooth or WiFi module needs to be connected to the BMS to use the APP; WiFi module needs to be connected to the BMS to achieve remote monitoring (WiFi module needs to be purchased separately). Some accessories shown are for functional display and may need to be purchased separately.
Specifications
| Brand/series | DALY SMART BMS |
| Supported battery types | Li-ion / LiFePO4 |
| Supported series | 3~24S |
| Rated current range | 40A~500A |
| Charging voltage (formula) | Li-ion: N (Battery string) * 4.2V; LiFePO4: N (Battery string) * 3.65V |
| Main circuit on-resistance | <20 mΩ |
| Passive equalization function | 100±30 mA |
| Equalization turn-on voltage (V) | Li-ion: 4.0 (can be set up); LiFePO4: 3.4 |
| Equalize opening differential pressure (mV) | 20 (can be set up) |
| Balance current (mA) | Li-ion: 100±15; LiFePO4: 100±30 |
| Single cell over-charge protection voltage (V) | Li-ion: 4.25±0.05; LiFePO4: 3.75±0.05 (can be set up) |
| Single cell over-charge recovery voltage (V) | Li-ion: 4.15±0.05; LiFePO4: 3.65±0.05 |
| Single cell over-discharge protection voltage (V) | Li-ion: 2.7±0.05; LiFePO4: 2.2±0.05 (can be set up) |
| Single cell over-discharge recovery voltage (V) | Li-ion: 2.8±0.05; LiFePO4: 2.3±0.05 |
| Protection delay (S) | 1±0.8 (shown for single cell over-charge and single cell over-discharge) |
| Charge/discharge over-current protection delay (S) | 1±0.8 |
| Charge/discharge over-current protection release condition | Removing the load is lifted |
| Short circuit protection condition | External load short circuit |
| Short circuit protection delay (µS) | 10~500 |
| Short circuit protection released | Remove load release |
| Temperature protection (°C) | Operating temperature (°C): charging: -35~75; discharge: -35~75 (can be set up) |
| Storage temperature (°C) | -40~85 |
| Current consumption | Working current (mA): <20; Resting current (µA): <600; Sleep time (S): 3600 |
Current/Overcurrent Values (A)
| Rated current (A) | 40 | 60 | 100 | 150 | 200 | 250 | 300 | 400 | 500 |
|---|---|---|---|---|---|---|---|---|---|
| Discharge overcurrent protection value (A) | 60 | 90 | 150 | 225 | 300 | 375 | 450 | 600 | 750 |
| Charging current (A) | 40 | 60 | 100 | 150 | 200 | 250 | 300 | 400 | 500 |
| Charge overcurrent protection value (A) | 60 | 90 | 150 | 225 | 300 | 375 | 450 | 600 | 750 |
Mechanical / Wiring (Dimensional data tolerance range: +0.5mm)
| K Series (40~100A) | |
| Current | 40A/60A |
| Size | 65*123*14mm |
| B-P- | 10AWG 100mm |
| Cable | 24AWG 300~450mm |
| Current | 100A |
| Size | 66*123*14mm |
| B-P- | 7AWG 100mm |
| Cable | 24AWG 300~450mm |
| M Series (150A/200A) | |
| Current | 150A |
| Size | 66*164*21mm |
| B-P- | 4AWG 150mm |
| Cable | 24AWG 300~450mm |
| Current | 200A |
| Size | 66*164*21mm |
| B-P- | 4AWG 150mm |
| Cable | 24AWG 300~450mm |
| S Series (250~500A) | |
| Current | 250A/300A/400A/500A |
| Size | 65*183*108mm |
| B-P- | 4AWG*2 / 1AWG*2 200mm |
| Cable | 24AWG 300~450mm |
Communication & Expansion (shown)
- CAN, RS485, dual UART communication interfaces
- DIO custom port
- KEY: key switch
- Accessories shown: buzzer, heating module, Bluetooth, WiFi module, GPS Module (4G)
- PC host computer support; 4.3-inch touch screen; 3-inch display screen
- Cloud Manager (supporting lithium battery remote management)
Applications (shown)
- Electric two-wheelers
- Electric tricycles
- Portable power
- Aerial work vehicle
- Ship energy storage
- ATV
- Floor sweeper
- RV energy storage
- Tour car
- Low speed vehicle
- Golf cart
- Forklift
For selection assistance (cell count, chemistry, and current rating) and after-sales support, contact customer service at https://tsolar.top/ or service@tsolar.top.
Details
Choose from K, M, or S series options to match your battery’s series count and current needs, from 3–24S and 40–500A.
A side-by-side specification chart makes it easier to pick the right series by current rating, overall size, and wiring requirements.
Protection settings, balancing current, and operating temperature ranges are summarized in one table for quick reference during system design.
Designed to support a wide range of lithium battery pack builds and applications, from portable power to light EV and energy storage.
CAN, RS485, and dual UART interfaces enable flexible integration, with expansion ports for accessories such as Bluetooth/WiFi modules.
The SMART BMS app puts key pack data—SOC, voltage, current, temperature, and alarms—on one dashboard for iOS and Android.
PC software access supports parameter reading and configuration when connected by UART, RS485, or CAN.
For remote and batch management, DALY Cloud can upload BMS data over Bluetooth, WiFi, or 4G for centralized monitoring and upgrades.
High-current design details focus on upgraded MOS components and a thick-copper PCB approach on applicable series.
Built-in functions include parallel connection support, pre-charge assistance, 100 mA passive balancing, and pack temperature protection.
Core safety protections cover electrical faults and environmental factors such as waterproofing, vibration resistance, and ESD protection.
An upgraded cooling structure combines multi-channel airflow with a high-speed fan and aluminum alloy heat sink to improve heat dissipation.
Low standby draw helps reduce parasitic losses, with sleep-mode and working-current figures provided as laboratory test references.
DALY Smart BMS uses an MCU-based control board with multiple balance connectors and lists voltage detection accuracy of ±10–15 mV.
DALY Smart BMS uses labeled P- and B- terminals, LED status indicators, and snap-on plug connectors for straightforward wiring and monitoring.
The DALY Smart BMS uses a layered design with aluminum cooling plates, a fan, and the main control and MOS boards for organized assembly.
The DALY Smart BMS package includes the BMS unit, product manual, Bluetooth module, B- P- output lead, cables, NTC sensor, and a CAN/485 5-pin lead.
DALY Smart BMS accessories include RS485/UART/CAN communication adapters, Bluetooth or WiFi modules, display panels, and an active balance module for flexible setups.
DALY Smart BMS installation uses the sampling cable for cell taps and connects B+ and B- to the battery pack with P+ and P- routed to the load and charger.
DALY Smart BMS can be activated using a key switch, the Bluetooth/SOC button, a CAN/RS485 or Bluetooth app connection, or by charging/discharging the battery.
DALY focuses on making green energy safer and smarter for battery management applications.
DALY’s BMS background highlights production and office centers, plus stated milestones like 130+ export countries and ISO9001.
Daly emphasizes technical support backed by eight R&D centers, over 100 engineers, and nearly 100 patented technologies.
DALY Smart BMS production is supported by an anti-static 20,000 m² workshop, 13 production lines, and over 500 technicians.
DALY Smart BMS orders ship within 3–7 days, with selectable logistics options and a one-year warranty under normal use.
