DALY Smart BMS 40–500A for Li-ion & LiFePO4, Universal or Fixed-Series, Bluetooth / UART RS485 CAN

DALY Smart Battery Management System with Common-Port Balancing

Manage a compatible lithium battery pack with the DALY smart BMS. Choose the battery configuration, charge/discharge current rating and communication version. The listing includes configurable universal-series hardware and separate fixed-series Li-ion or LiFePO4 boards. Every offered variant is an actual in-stock supplier combination; unavailable combinations are not added.

Choose the Correct Configuration

• Universal 4–8S, 7–17S and 7–24S: supplier series-range options with UART, RS485 and CAN. Available ratings are 40A, 60A, 80A, 100A, 150A, 200A, 250A, 300A and 400A. The 200A and higher options explicitly include a fan.
• Fixed-series Li-ion: 3S 12V, 7S 24V, 10S 36V, 13S 48V, 14S 48V, 16S 60V, 17S 60V and 20S 72V, with actual available Bluetooth or UART/RS485/CAN combinations.
• Fixed-series LiFePO4: 4S 12V, 8S 24V, 12S 36V, 15S 48V, 16S 48V and 20S 60V, with actual available Bluetooth or UART/RS485/CAN combinations.
• Fixed-series current choices range from 40A to 500A where in stock. 80A is offered only in the universal-series group in this source. The fixed-series and universal variants are not interchangeable solely because their current ratings match.

Pack-voltage labels follow the supplier's naming. Charger voltage depends on actual chemistry and cell count: Li-ion N × 4.2V and LiFePO4 N × 3.65V. Bluetooth selection means the supplier's Bluetooth package; UART + RS485 + CAN means the specified wired-interface package. The AK 80A/100A illustrations show integrated Bluetooth, but they do not establish that every wired-interface or fixed-series SKU includes the same Bluetooth hardware.

AK 80A/100A Universal Chemistry Reference

These ranges come from the AK marketing/specification images. Supplier-linked AH/AM/AS option sheets instead state LTO 11–17S and 11–24S for the higher ranges. This discrepancy is retained: confirm the actual hardware's LTO range before use. LTO is a configuration reference, not a separate fixed-series sale option. Sodium-ion support requires customization and is not offered as a standard variant.

Monitoring, Balancing and Expansion

• AK illustrated boards feature integrated Bluetooth, QR-code app pairing, live battery data and configurable settings. App displays capacity, voltage, current, temperature and alarms.
• AK app can switch compatible LiFePO4, Li-ion and LTO settings, with LiFePO4 as the supplier default. Configure only within the selected hardware's permitted range.
• AK app-controlled deep sleep is quoted below 100µA by the supplier; this is not a universal consumption value for every offered board.
• Passive balancing: general heading 100 ± 30mA; detailed references Li-ion 100 ± 15mA and LiFePO4 100 ± 30mA. Default balancing start: Li-ion 4.0V, LiFePO4 3.4V, with 20mV difference, configurable.
• AK parallel protection is illustrated for up to 10 suitably matched battery packs to reduce connection-current surges. Actual system design, wiring and firmware compatibility must be verified.
• AK reference lists dual UART, CAN/RS485, KEY and DIO interfaces and two NTC probe assemblies (four channels). UART PC software offers additional setup and calibration.
• WiFi, GPS/4G, displays, heating modules, buzzer, activation/key switch and active-balancing modules are optional. Compatible accessories for the illustrated smart red-board series require the supplier's DL-1.25 connecting cable.
• Supplier cloud illustration references smart.databms.com for remote fleet monitoring, stored data and subaccounts using optional compatible communications hardware. Cloud/IoT access requires enabled permissions; service availability is not guaranteed by this product listing.

Physical Specifications — Preserve the Version Differences

Universal linked sheets specify 24AWG / 550mm sense harnesses, working −30 to +70°C and storage −40 to +80°C. Figures above apply to those linked universal versions, not measured specifications for fixed-series boards.

The separate general family table states K 123 × 66 × 14mm, M 164 × 66 × 21mm and S 183 × 108 × 26mm, with 24AWG / 300–450mm sense leads. It lists K 40/60A 10AWG / 100mm, K 100A 7AWG / 100mm, M 4AWG / 150mm, S 250A 2AWG × 1, S 300A 4AWG × 2, and S 400/500A 1AWG × 2. These differ from the universal sheets; confirm the delivered board's model, connectors and footprint.

AK dimensional drawing gives length 125 ± 1mm, width 65 ± 0.5mm, thickness 14 ± 0.5mm, and mounting references 108.5 ± 0.3mm, 46 ± 0.3mm and 26 ± 0.3mm. Main-circuit conduction resistance is quoted below 20mΩ. Peak-current references are 120A for AK 80A and 150A for AK 100A; they are not continuous ratings.

General Smart-Series Protection Reference

All reference data are supplier room-temperature laboratory results, not independently measured. Actual configured protection thresholds must suit the cells; the BMS temperature/protection references are separate from cell charging limits. AK-specific sheet instead states operating −30 to +70°C and storage −40 to +85°C. Do not merge version-dependent values into a universal specification.

Construction and Applications

Supplier AK illustrations show aluminum heat-spreading parts, control MCU, thermally conductive ABS encapsulation and integrated Bluetooth. Potting is described as resisting moisture, vibration and oxidation, patent reference ZL201821243978.5; no certified IP rating is supplied. The claimed 40% size reduction is a supplier comparison, not a measurement established here.

For correctly designed compatible lithium battery packs in mobility, electric scooters/tricycles, golf carts, RV storage, portable power and AGV applications. Pictured batteries and equipment are examples and are not included.

Wiring and Package Contents

1. Connect B- to the total battery-pack negative first; keep P- insulated until the output connection.
2. With the sense harness disconnected from the BMS, connect black B0 to pack negative and successive red conductors to each cell positive in order. N series cells use N+1 sense conductors including B0. Insulate unused conductors individually.
3. Connect the B+ lead to total pack positive. Verify polarity and adjacent sense-pin voltages before plugging in the harness. Follow the exact connector labels of the delivered version.
4. Charger and load positive connect to pack B+; charger and load negative connect to common P-. Fit the correct temperature probes and configure chemistry, series count and protection settings before operation.

Supplier package photograph uses a 7–24S AK example: selected BMS, box, guide, B-/P- power leads, output fasteners, B+ lead, two NTC probe assemblies, sense harness and CAN/RS485 five-pin lead. Included connector/lead configuration depends on the selected package; AH source photos show attached power leads. Current options labelled “+ Fan” include the fan. Optional USB adapters, WiFi/4G modules, active balancers, displays, heaters, buzzer, switch, batteries and charger are not included.

Details

English versions of the supplier information images. Illustrations cover several board families; actual chemistry, series count and current rating follow the selected variant. Optional accessories are reference only.

Wiring and Connection Order

7–24S AK wiring example. Connect B- first, wire sense conductors in order with the connector unplugged, connect B+ to total positive and insulate unused conductors.

UART PC Configuration

PC monitoring and calibration use compatible UART communications hardware; the PC and USB adapter are not included.

Communication and Optional Expansion

AK 80A/100A reference. Dual UART, CAN/RS485 and optional displays, heating, WiFi and 4G/GPS modules depend on compatible configuration.

General K/M/S Specifications

General family values are separate from the source-linked universal AH/AK/AM/AS sheets. Confirm actual board model and configured thresholds.

AK Compact Dimensions

AK 80/100A supplier comparison. 125 × 65 × 14mm; claimed 40% reduction refers to the supplier comparison.

Optional DALY Cloud Monitoring

Optional compatible WiFi or 4G/GPS hardware and activated cloud permissions are required; these modules and services are not included.

Optional Accessory Catalogue

Optional accessories require correct compatibility and DL-1.25 connection cables. Catalogue items are not included in the selected BMS package.

AK Universal Chemistry Ranges

Choose one hardware range; AK illustrations show LiFePO4 default, NCM and LTO ranges. Higher-range AH/AM/AS sheets give different LTO minimums; confirm delivered hardware.

AK Package Reference

7–24S AK example shows BMS, power leads, fasteners, B+ lead, NTC probes, sense harness, communications lead, box and guide. Actual package varies by selected version.

General K/M/S Size Reference

General family table dimensions differ from the linked universal versions; these figures are not interchangeable.

AK Construction

Aluminum heat spreading, control MCU, encapsulated structure and built-in Bluetooth in the illustrated AK version.

AK 80A/100A Dimensions and Settings

Preserve dimensional tolerances, chemistry-specific series ranges, 20mV balancing difference and optional module notes. Sodium-ion requires customization.

Application Examples

AK 80A/100A examples of mobility, portable power and AGV pack design; equipment and batteries shown are not included.

Parallel Protection and Passive Balancing

AK reference for up to 10 matched packs in parallel and nominal 100mA passive balancing. Actual system compatibility and wiring must be checked.

Encapsulated Moisture-Resistant Construction

Supplier potting claim and patent reference; no certified IP rating is supplied.

Select the Correct Universal Range

4–8S, 7–17S and 7–24S are separate hardware options; one illustrated board does not establish universal 4–24S coverage.

App Monitoring and Chemistry Reference

AK reference shows integrated Bluetooth and live data. Chemistry and permitted series count must match selected hardware.

Pairing, Deep Sleep and Chemistry Profiles

AK reference: QR pairing, app sleep below 100µA and LiFePO4 default. Sodium-ion requires customization.

AK Feature Summary

Representative AK 80A/100A dimensions, construction, Bluetooth and parallel features; do not apply automatically to every offered fixed-series board.