1. Introduction
The Aideepen BT4-21700 is a sophisticated 4-channel battery analyzer designed for comprehensive testing of 21700 ternary lithium iron batteries. It allows for simultaneous charging, discharging, capacity separation, and aging tests on up to four batteries independently. Featuring a 1.77-inch color screen, it provides real-time display of test parameters, ensuring accurate and reliable data for battery performance evaluation. This manual provides essential information for safe and effective use of your device.
2. Product Features
- Four Independent Channels: Simultaneously charge, discharge, separate, or age test four 21700 batteries without interference.
- Reverse Connection Protection: Built-in protection prevents damage from incorrect battery insertion.
- Efficient Heat Dissipation: Equipped with an ABS air guide base and a 40x40mm fan for active cooling, ensuring stable long-term operation.
- Accurate Capacity Measurement: Provides authentic and reliable data for high-precision battery performance evaluation.
- User-Friendly Interface: 1.77-inch color screen with real-time display of test parameters and support for Chinese and English interfaces.
- Direct 21700 Battery Testing: Designed specifically for direct testing of 21700 batteries without requiring additional adapters.
- PETG-based Battery Holder: Features positive and negative springs for easy installation and improved heat dissipation.
3. Important Safety Information
Please read all safety warnings carefully before operating the device to prevent injury or damage.
- Battery Compatibility: This device is designed for 21700 ternary lithium iron batteries only. Do NOT attempt to charge lithium iron phosphate batteries or any other battery types.
- Power Supply: Use two DC 5V 3A or higher Type-C adapters for power. Insufficient power supply may lead to improper operation or damage.
- Battery Condition: Do NOT test damaged, leaking, or visibly compromised batteries. This can lead to fire, explosion, or other catastrophic consequences.
- Polarity: Always ensure correct battery polarity when inserting. Although reverse connection protection is supported, always double-check to prevent potential issues.
- Ventilation: Ensure the device is operated in a well-ventilated area to support the active cooling system and prevent overheating.
- Supervision: Do not leave the device unattended during operation, especially during charging or discharging cycles.
- Modifications: Do not attempt to modify the device or its components, especially the discharge resistance. Unauthorized modifications can compromise safety and performance.
4. Technical Specifications
| Parameter | Value |
|---|---|
| Power Supply (Self-Provided) | 2x DC 5V 3A or higher adapters, powered by Type-C |
| Test Object | 21700 ternary lithium iron batteries (cannot charge lithium iron phosphate batteries) |
| Charging Voltage | 4.2V, non-adjustable; uses onboard 4506 charging chip |
| Charging Current | Maximum 1A non-constant current, non-adjustable; uses 4056 charging control |
| Stop (Discharge) Voltage | 2.5V-3.5V, 11 adjustable levels |
| Discharge Current | Maximum 1A non-constant current, non-adjustable |
| Discharge Resistance | 6W3Ω 9J winding resistor; modifications not supported |
| Internal Resistance Measurement Method | DC two-wire method principle test; results are for reference only |
| 21700 Battery Testing | No adapter required, directly tests 21700 batteries |
| Cooling Method | 40x40mm fan with active cooling |
| Reverse Polarity Protection | Supported |
| Device Dimensions | 147 x 102 x 33mm |
5. Setup Guide
- Unpacking: Carefully remove the BT4-21700 battery analyzer from its packaging. Inspect for any signs of damage.
- Power Supply Connection: The device requires two DC 5V 3A or higher power adapters. Connect these adapters to the Type-C ports on the device. Ensure the power sources are stable and meet the specified requirements.
- Placement: Place the analyzer on a stable, flat surface in a well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Battery Insertion: Insert up to four 21700 ternary lithium iron batteries into the designated channels (CHN1, CHN2, CHN3, CHN4). Pay close attention to the polarity markings (+ and -) on the battery holders to ensure correct insertion. The PETG-based battery holders are designed for easy installation.
6. Operating Instructions
The BT4-21700 offers multiple operating modes for comprehensive battery analysis. The 1.77-inch color screen displays real-time parameters for each channel.
6.1 Interface and Controls
The device features a display screen and several buttons for navigation and mode selection. The display shows real-time voltage, current, cumulative capacity, cumulative energy, reference internal resistance, run time, and cycle count for each channel.
6.2 Operating Modes
The BT4-21700 supports various operating modes, including AUTO, CHG (Charge), and DSG (Discharge). You can switch between these modes using the control buttons.
6.3 Starting a Test
- Ensure batteries are correctly inserted and power is supplied.
- Use the navigation buttons to select the desired channel (CHN1-CHN4).
- Select the operating mode (Charge, Discharge, Auto, etc.) for the chosen channel.
- Adjust the stop (discharge) voltage if performing a discharge test (adjustable from 2.5V to 3.5V in 11 levels).
- Initiate the test. The screen will display real-time data for the active channels.
6.4 Internal Resistance Measurement
The device uses a DC two-wire method for internal resistance measurement. Please note that these results are for reference only and may not be as precise as professional four-wire measurement methods.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Ensure no liquids enter the device.
- Storage: When not in use, store the analyzer in a cool, dry place, away from direct sunlight and extreme temperatures.
- Fan Maintenance: Periodically check the cooling fan for dust accumulation. If necessary, gently clean the fan blades with compressed air to maintain optimal heat dissipation.
- Battery Holders: Inspect the battery holders for any debris or corrosion. Clean gently if needed to ensure good contact with batteries.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Incorrect or insufficient power supply. | Ensure two DC 5V 3A or higher Type-C adapters are correctly connected. |
| Battery not detected | Battery inserted incorrectly (polarity). Poor contact. Damaged battery. | Re-insert battery with correct polarity. Clean battery contacts. Do not test damaged batteries. |
| Inaccurate readings | Poor battery contact. Device overheating. | Ensure good battery contact. Check fan operation and ensure adequate ventilation. |
| Fan not operating | Dust accumulation. Fan malfunction. | Clean the fan. If still not working, contact support. |
| Cannot charge lithium iron phosphate batteries | Device is not designed for this battery chemistry. | This is expected behavior. The device only supports 21700 ternary lithium iron batteries. |
9. User Tips
- For the most accurate capacity measurements, ensure batteries are fully discharged before starting a charge test, or fully charged before starting a discharge test.
- Always use high-quality 5V 3A Type-C power adapters to ensure stable and reliable operation of the analyzer.
- Take advantage of the four independent channels to test multiple batteries simultaneously, saving time.
- While the internal resistance measurement is for reference, it can still be a useful indicator for comparing the health of similar batteries.
- Familiarize yourself with the different operating modes (AUTO, CHG, DSG) to best suit your testing needs.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.
