JBD 4S 12.8V 30A LiFePO4 BMS (HP04S024 V1.0)

1. Product Overview

The JIABAIDA HP04S024 V1.0 is a Battery Management System designed for four LiFePO4 cells or parallel cell groups connected in series.

It is labelled for a 4S LiFePO4 configuration and a 30A current rating. A completed 4S LiFePO4 battery pack has a nominal voltage of approximately 12.8V and is normally charged to a maximum of 14.6V.

The board uses a same-port design, allowing charging and discharging through a common power connection. Its integrated balancing function helps manage voltage differences between the four series groups.

Metal plates cover the main circuitry to provide mechanical protection and assist with heat distribution. Cell-sensing wires and plug connectors are visibly included.

2. Technical Specifications

3. Main Features

• Designed specifically for 4S LiFePO4 battery packs
• 30A rating printed on the product label
• Same-port charging and discharging arrangement
• Integrated cell-voltage balancing
• Cell-sensing wiring harness supplied
• Plug-in connectors for convenient installation
• Metal heat-spreading and protective construction
• Compact internal battery-pack design
• Suitable for new battery assemblies and compatible replacement applications

4. Typical BMS Functions

A compatible BMS of this type is intended to manage and protect a battery pack against conditions such as:

• Excessive individual-cell charging voltage
• Excessive individual-cell discharge
• Excessive charge or discharge current
• Output short circuits
• Cell-voltage imbalance
• Abnormal operating temperature when supported by the fitted sensor system

The precise triggering voltages, delay times, temperature limits, recovery behaviour and balancing current are not printed on the visible label and should be confirmed before use.

5. Wiring and Connections

The supplied wiring includes cell-sensing leads for monitoring the individual voltage points in the 4S battery pack.

Before connecting the BMS:

• Identify the main battery-negative terminal.
• Identify each intermediate series-cell junction.
• Identify the main battery-positive terminal.
• Confirm the harness-wire order with a multimeter.
• Verify that every adjacent sensing point measures approximately one cell voltage.
• Confirm the complete pack voltage before attaching a charger or load.

Do not determine the connection order solely from the wire colours. Incorrect sensing-wire sequencing can permanently damage the BMS.

6. Suitable Applications

This BMS may be suitable for compatible 4S LiFePO4 battery packs used in:

• Solar-energy storage systems
• UPS and emergency backup batteries
• Portable power stations
• Robotics and automation equipment
• LED lighting systems
• Communication equipment
• Rechargeable DC power products
• DIY LiFePO4 battery projects
• Battery repair and replacement work
• Custom 12V-class LiFePO4 assemblies

Compatibility depends on the battery configuration, current requirement, charging system, communication requirements and installation space.

7. Battery and Charger Compatibility

Use this BMS only when:

• The battery chemistry is LiFePO4.
• The pack contains exactly four series-connected cell groups.
• Each cell group has a nominal voltage of approximately 3.2V.
• The charger is designed for a 4S LiFePO4 pack.
• The charger’s maximum voltage does not exceed 14.6V.
• The required continuous and peak currents are within the verified limits.
• The sensing-wire arrangement matches the battery pack.
• The board dimensions and connection layout suit the installation.

This BMS is not suitable for standard 4S lithium-ion, NMC or LiPo packs charged to 16.8V. Those batteries require different voltage thresholds and a chemistry-specific BMS.

8. Communication Note

Communication connectors are visible on the board, but the supplied photo does not confirm the exact interface, communication protocol or compatible application.

A Bluetooth, UART, RS485, CAN or display accessory must not be assumed to be included unless it is separately specified. Verify accessory and software compatibility using the exact model number before ordering.

9. Installation Guidance

• Match and balance all four cell groups before assembly.
• Verify every cell-group voltage with a multimeter.
• Connect the sensing leads in the correct sequence.
• Use correctly rated cables, terminals and insulation.
• Keep the metal plates electrically isolated from exposed battery connections.
• Secure the BMS where it receives suitable ventilation.
• Avoid placing the board where it can be crushed or exposed to vibration.
• Insulate every exposed terminal after installation.
• Confirm the output voltage before connecting the charger or equipment.
• Use a charger specifically designed for 4S LiFePO4 batteries.

10. Important Current-Rating Note

The product label states a 30A rating, but operating capability can also depend on:

• Ambient temperature
• Cooling and ventilation
• Cable thickness
• Connection resistance
• Battery-cell capability
• Duration of the load
• Enclosure design
• BMS temperature-protection settings

Confirm whether 30A represents the required continuous operating current and allow a suitable safety margin for applications with high starting or surge currents.

11. Safety Information

• Incorrect sensing-wire order can immediately damage the BMS.
• Never reverse the battery polarity.
• Do not short-circuit the battery or power terminals.
• Do not use the BMS with incompatible battery chemistry.
• Never charge a 4S LiFePO4 pack above 14.6V.
• Do not exceed the verified current rating of the cells, wiring or BMS.
• Keep the assembly away from water, conductive debris and loose metal objects.
• Stop using the BMS if it becomes damaged, burnt or unusually hot.
• Battery-pack assembly should be performed by a person familiar with lithium-battery wiring and safety.