Overview
Jiabaida SP21S001 is a smart Battery Management System (Smart BMS) for lithium battery packs, with built-in Bluetooth and UART communication for monitoring and parameter configuration. It is stated as applicable to 3.7V Li-ion / 3.2V LiFePO4 batteries, and also notes LiFePO4/Li-ion/LiCoO2 compatibility.
Key Features
- Built-in Bluetooth (BT) and UART communication
- Supports automatic identification of string number
- Supports display: UART display
- Online OTA upgrade is stated
- Cell balancing: idle equalization; balance current 100-150mA
- Heat dissipation structure is stated: honeycomb heat sink & aluminum alloy heat sink
- Nine protection items listed: Overcharge Protection, Over Discharge Protection, Overcurrent Protection, Short Circuit Protection, Temperature Protection, Offline Protection, Surge Protection, Balance Protection, New UV Glue
- Overcurrent performance statements: continuous overcurrent 150A/200A; peak overcurrent 300A/600A (5S); extreme overcurrent 1200A~1600A (10~500us)
- High-power bidirectional TVS is stated: 5000W
- UART BOX (optional) is shown: adjust protection parameters (voltage/current/temperature, etc.), upgrade and record BMS data
For app manuals, BMS specification, and wiring diagram support, contact https://tsolar.top/ or email service@tsolar.top.
Specifications
| Product Name | Battery Management System |
| Type | Smart BMS |
| Model Number | SP21S001 |
| Size | 148mm * 92mm * 20mm |
| Voltage | 24V / 36V / 48V |
| Current (continuous) | 100A-200A (also stated: 120-200A) |
| Strings | 8S-21S (also stated: 6-21S compatibility) |
| Communication | UART |
| Bluetooth | Yes; Built-in BT |
| Support display | Yes |
| Display Type | UART Display |
| Balancing | Idle equalization; balance current 100-150mA |
| Overcurrent statements | Continuous overcurrent 150A/200A; peak overcurrent 300A/600A 5S; extreme overcurrent 1200A~1600A 10~500us |
| TVS statement | Bidirectional TVS 5000W |
| Features | Good heat dissipation; multiple communication |
| Application | Electric products |
| Certification icons shown | CE, ISO, FC, PSE, RoHS |
What’s Included
- BMS with built-in Bluetooth
- Balance wires
Software & Tools
- Mobile app: “Xiaoxiang Electric” (iOS/Android). It is stated to monitor and change parameters (within the specified range), with Chinese and English supported. Display items shown include SOC, voltage, current, temperature, differential pressure, alert, number of cycles, and record data. App download link: http://www.jiabaida.com/appdown/index.html
- PC software: UART “JBD PC Tool Box”. Download link: https://jbdtools.oss-cn-beijing.aliyuncs.com/packfile/JBDTools.zip
- UART LCD displayer is stated to monitor parameters on an LCD display (accessory sold separately)
- Wiring diagrams indicate balance-lead mapping and short-connection methods for 14S to 21S configurations
Applications
- Low speed vehicle
- AGV
- Special vehicle
- Vehicle
- Tricycle
- Electric motorcycle
Details
Jiabaida SP21S001 is a smart BMS platform for lithium battery packs, offering Bluetooth/UART communication and multiple configuration options.
Designed for 8–21 series packs, with Bluetooth monitoring and support for LiFePO4 and Li-ion chemistries.
Bluetooth integration enables remote monitoring, and OTA upgrade support helps keep settings and firmware up to date.
Multiple protections cover common fault conditions such as overcharge, over-discharge, overcurrent, short circuit, and temperature events.
A practical fit for many electric vehicle and mobility builds, from low-speed vehicles to AGVs and tricycles.
High-current MOS design supports continuous 150A/200A operation with higher short-duration peak capability.
Heat-sink structure is built for improved thermal performance during sustained high-current operation.
Idle equalization helps reduce cell-to-cell voltage differences to support stable pack performance over time.
A 5000W bidirectional TVS stage is included to improve resistance to surge and reverse-voltage impact.
The Xiaoxiang Electric app displays SOC, voltage, current, temperature, cycle count, alerts, and recorded data.
Optional UART tools allow parameter tuning for voltage, current, and temperature protections, plus data logging.
Use the balance-wire mapping guide to connect the correct series count before powering the pack.
Short-connection methods for different string counts help adapt the same BMS to multiple pack configurations.
Follow the numbered tap order carefully to avoid incorrect balance lead placement.
These wiring references support common mid-voltage builds where fewer series cells are used.
Correct balance lead routing is essential for accurate monitoring, protection, and balancing behavior.
Lower series-count packs can be supported by applying the appropriate short-connection scheme.
When building smaller packs, use the 9S mapping to match each tap to the correct cell group.
Jiabaida SP21S001 Smart BMS wiring uses an 8-series balance lead layout with labeled UART, switch, and temperature sensor connectors for clean setup.
The smart BMS is intended for a wide range of applications, including solar street lamps, energy storage UPS, emergency power, and electric vehicles.
Documentation lists RoHS, ISO 9001, SGS, and patent-related certificates associated with the Jiabaida SP21S001 Smart BMS.
A production equipment overview lists key machines used for SMT placement, soldering, testing, and assembly processes.
Multiple payment options are supported, and orders are packed and shipped in bulk cartons for delivery.
