The TBB Power Bi1248-1200 is a bi-directional converter charger designed for vehicles or boats equipped with a dual battery system. Its primary function is to manage power flow between a 12Vdc chassis (starter battery) and a 48Vdc auxiliary battery, ensuring both are appropriately charged and can power their respective loads.
Function Description:
The Bi1248-1200 operates in two main modes:
-
Charging the 48V Auxiliary Battery (Booster Mode): When the vehicle's engine is running or the alternator is active, the device utilizes the 12Vdc alternator output to charge the 48Vdc auxiliary battery. Simultaneously, it can power the 12Vdc loads.
- Traditional Alternator Mode: If the starter battery voltage exceeds 13.3V, the device draws power from the alternator to charge the 48V auxiliary battery with a maximum current of 25A. It stops charging when the starter battery voltage drops below 12.8V.
- Smart Alternator / Euro 6 Mode: This mode can be activated via a DIP switch. In this configuration, an IGN (ignition) signal wire must be connected. The device determines charging based on both the IGN signal and the starter battery voltage. Charging initiates when the IGN signal is active and the starter battery voltage is above 12.2V. Charging ceases when the IGN signal is active and the starter battery voltage falls below 11.6V.
-
Powering 12Vdc Loads from the 48V Auxiliary Battery (Stepdown Mode): When the engine is off, the device converts 48Vdc from the auxiliary battery to 12Vdc, supplying power to all 12Vdc loads.
The Bi1248-1200 employs a non-isolated conversion topology, achieving high efficiency (up to 94% or above). It utilizes DSP (Digital Signal Processor) control, enabling complex control algorithms for high precision and fast response. The unit features built-in isolated RS485 and CAN communication capabilities, allowing for integration into systems requiring monitoring and control.
Important Technical Specifications:
- Input Voltage:
- Booster Mode: 11.6V to 16Vdc
- Stepdown Mode: 42V to 60Vdc
- Max Input Current:
- Booster Mode: 100A
- Stepdown Mode: 25A
- Output Voltage:
- Booster Mode: Nominal 48Vdc, adaptive charging
- Stepdown Mode: 13Vdc
- Max Output Current:
- Booster Mode: 25A
- Stepdown Mode: 100A
- Efficiency: Max >94%, Full load >91%
- Standby Consumption: <2mA
- Charging Algorithm: TBB premium II multi-stage (Booster Mode), Constant Voltage (Stepdown Mode)
- Overvoltage Protection:
- Input: Alarm at 14.9Vdc, protection at 16Vdc (Booster Mode); Alarm at 59.6V, protection at 60Vdc (Stepdown Mode)
- Output: Alarm at 59.6V, protection at 60Vdc (Booster Mode); Alarm at 14.9Vdc, protection at 16Vdc (Stepdown Mode)
- Over Temperature Protection: 85°C
- Output Short Circuit Protection: Fuse (hardware) and Software
- Electric Strength: 2000V
- Working Temperature: -25°C to 60°C
- Cooling: Thermal control fan
- Protection Rating: IP20
- Dimensions (LxWxH):
- Device: 282.8 x 200 x 85mm
- Installation Size: 306.3 x 200 x 85mm
- Weight: 3kgs
- Structure: Powdered steel
Usage Features:
- High Power In-vehicle Charging: Capable of charging up to 1.2KWH per hour.
- DSP Control: Utilizes sophisticated algorithms for precise and fast control.
- Non-Isolation Design: Achieves maximum efficiency of 94%.
- Wide Alternator Input Range: 11.6Vdc to 16Vdc, withstanding up to 35Vdc.
- Smart Alternator Compatibility: Can be used with Euro 6 vehicles and smart alternators.
- Multiple Battery Chemistries: Supports various battery types, including lithium batteries.
- TBB Premium II Multi-Stage Charging Algorithm: Ensures optimal charging for the auxiliary battery.
- Automatic Temperature and Voltage Compensated Charging: Adapts charging parameters based on environmental conditions and battery status.
- Built-in RS485 and CAN Capability: Facilitates communication and integration with other systems.
- Dry Contact Output: Capacity of 250Vac/28Vdc 5A, for external control or signaling.
- Dry Contact Input: Allows for external control to power off the device.
- Comprehensive Protection: Includes output short circuit, output over current, over/low voltage, over temperature, and output reverse polarity protection.
- DIP Switch Configuration: An 8-digit DIP switch is provided for setting battery types (AGM, GEL, LFP, OTHER), alternator type (Normal, Smart Generator - Euro 6), and system working mode (Stand-alone). This is crucial for correct operation, especially with Euro 6 vehicles.
- Indicator Lights: LEDs provide visual feedback on the device's status, including Buck mode (48V battery normal, 48V charges 12V; Flash: standby), Boost mode (12V battery normal, 12V charges 48V; Flash: standby), Alarm (overheating, over/under voltage, communication loss), and Fault (starter/service battery overvoltage, short circuit, over current, internal issues).
Maintenance Features:
- Safety Precautions: Emphasizes turning off power before installation or servicing due to dangerous voltages and high temperatures. Only qualified and authorized personnel should open and repair the unit.
- Installation Requirements: Specifies suitable mounting on concrete or non-combustible surfaces, adequate ventilation (minimum 10cm clearance at ends, 5cm at sides), and correct cable gauging and secure connections to prevent fire and electric shock.
- Battery Handling Precautions: Advises on safety measures when working with batteries, such as using fresh water for acid contact, avoiding smoking or flames near batteries, and removing metal items to prevent short circuits and burns.
- Cable and Fuse Preparation: Provides a table with recommended cable gauges and fuse specifications for 12V and 48V connections, including a mandatory cable fuse on the 12Vdc input for safety.
- Wiring Instructions: Details the use of M8 and M5 nuts with washers for crimp terminals, emphasizes connecting negative terminals first for safety, and outlines connections for various sampling and communication wires (IGN, voltage, temperature, dry contact).
- Operating Temperature De-rating Curve: The device has built-in intelligent temperature control that reduces output power if high internal temperatures are reached, protecting the unit from damage.
Need help?
General
To Next Page
