The JBD LCD02 (Big / Touch / UART) is a display accessory made by Jiabaida (JBD) designed for battery management systems (BMS). It is primarily used to display information such as:

• State of Charge (SOC)

• Voltage, current, and temperature of battery cells

• Other status indicators

• It may also allow control of inputs/outputs on the protection board via the touch interface.

It is commonly used in battery packs for electric vehicles, solar energy systems, and battery storage solutions where real-time monitoring of battery health and status is required.

Key Specifications

Strengths

1. Good Visibility and Large Size
   The larger display size improves readability from a distance, making it suitable for panels, vehicles, and battery systems where clear visibility is essential.

2. Wide Operating Voltage Range
   Compatible with a broad voltage range (10-90 V), supporting 3S to 24S lithium battery configurations, providing flexibility for various battery pack sizes.

3. Touch Screen Functionality
   The touch interface allows easy navigation between display pages and can control inputs/outputs on the BMS, reducing the need for extra buttons.

4. Multiple Communication Interfaces
   Availability of UART and RS485 variants helps users select the appropriate version based on their BMS requirements. The UART version may share the communication port with a Bluetooth module on some JBD BMS units.

5. Good Build Quality and Compatibility
   Generally reliable and compatible with JBD BMS systems and associated software tools, allowing effective monitoring and parameter setting.

Weaknesses and Limitations

1. User Interface and App Limitations
   Some users find the mobile app for configuration not very intuitive or limited in functionality. Connection issues or restricted settings changes can occur.

2. Interface Compatibility Confusion
   Selecting the correct interface version (UART vs RS485) is critical, as mismatches result in non-functioning displays. Shared ports with Bluetooth modules may cause conflicts if not properly configured.

3. Power Consumption
   The color TFT touch display consumes more power compared to simpler displays, which can be a concern in low-power or standby scenarios.

4. Size and Installation Considerations
   The larger size requires sufficient mounting space and potentially additional protection from environmental factors such as dust, moisture, and physical damage.

5. Price
   The advanced features and larger size come at a higher cost compared to simpler displays, which might be unnecessary for basic SOC and voltage readings.

6. Performance in Harsh Conditions
   There is limited information on the display’s durability under extreme environmental conditions. Some users report occasional communication or Bluetooth issues that might affect the display’s operation.