1. What does each digit in the model name represent?

1. EST: Yishengda brand;
2. BT: Energy Feedback Battery Tester (discharge energy recovery);
3. 100V: Maximum single-channel voltage 100V (48V/60V/72V can be measured for two-wheel, three-wheel, and small energy storage batteries);
4. 50A: Maximum single-channel charge/discharge current 50A;
5. 24CH: A total of 24 independent channels, allowing 24 battery groups to be tested separately without interference.
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2. What does this machine do?

1. Automatically charges and discharges the battery, repeating thousands of times;
2. Record how much power is charged and discharged each time, and assess capacity degradation;
3. Record voltage, internal resistance, and temperature to identify defective products prone to bulging and large voltage differences;
4. Energy Feedback: Ordinary aging cabinets discharge by heating resistors and consuming power; This unit converts battery discharge back into AC power and feeds it back to the factory grid, saving a lot on electricity costs

1. Host computer: The software you operate, setting charging and discharging rules, viewing curves, and exporting data;
2. Mid-position computer: intermediate transfer station for storing test data; records are not lost during sudden power outages;
3. ACDC module: AC power from the power grid ↔ and internal DC power conversion between the machine (charging grid, discharging back to the grid);
4. DCDC module: Each channel has independent charge/discharge control, directly connected to the battery;
5. Lithium battery pack under test (with or without BMS protection board).
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3. Core parameter translation

1. Voltage and current range (which batteries can be measured)

• Charging: 0~100V→ 48V (16 series), 60V, 72V electric vehicle batteries, and compact energy storage all compatible;
• Minimum discharge voltage 10V: does not forcibly push the battery to the scrap voltage;
• Current: 50mA~50A, supports both low-current slow charging and high-current fast charging;
• Single-channel maximum power 5KW: suitable for battery packs ranging from tens to 200 amph.

2. Accuracy (whether the measurement data is accurate)

3. Safety protection (prevents battery damage and machine burnout)

4. Testing Functions (What operations can the software perform)

4. Key point: Optional BMS communication module

1. Standard status: No BMS communication (default factory)

2. Optional: Equipped with a 485/CAN communication module

1. The machine reads and uploads BMS in real time: voltage of each single unit, highest/lowest single, temperature difference, SOC, fault alarm;
2. You can set the individual cell voltage as the shutdown condition: for example, if a certain batch is fully charged to 3.65V lithium iron, the device immediately stops charging, providing true closed-loop protection
3. The difference between the two types of communication (combined with what was discussed earlier);

• CAN: High real-time performance, fault reporting in milliseconds, requires DBC protocol, suitable for automotive and high-power energy storage BMS;
• RS485 Modbus: Low cost, commonly used in simple protection boards like two-wheeler JK and Dali, polling and reading data, slower response;

4. New features after selection: the software allows viewing each string of cell data, cycle records to save individual cell pressure differences, and filtering for cells with poor consistency.
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3. Optional two additional auxiliary modules

1. PT10 Temperature Channel: Measures battery surface temperature, automatically shuts down at high temperatures;
2. Voltage auxiliary channel: Collects the voltage of each cell in each string separately (used when no BMS is available).
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5. Two wiring methods (split port / same terminal)

1. Same port (standard alligator clip): charging and discharging share two thick wires (red positive, black negative), suitable for low-power two-wheel batteries;
2. Ports (optional OT terminal): One charging cable and one discharge wire are separate; dedicated to high-current, high-power batteries, resulting in lower heat generation.
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6. What is energy feedback? Beginners care most about saving money

7. What can software do?

1. Visual interface: 24 channels simultaneously display each group of real-time voltage, current, capacity, and temperature;
2. Customizable workflow steps: for example, → constant current charging after 1 hour of standing→ constant current discharge → standing idle, with automatic cycles of tens of thousands of times;
3. Curve plotting: freely combine time, voltage, and capacity curves to visually observe how much battery capacity decreases over cycles;
4. Data is automatically stored in the MySQL database, exported to Excel anytime for lifetime reports;
5. Permission management: Administrators and operators are separated to prevent unauthorized modification of testing processes.
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8. Safety-related key areas

1. Power must be three-phase 380V industrial electricity; household 220V cannot be used;
2. Wires must not be reversed; the machine has anti-reverse protection, but frequent reverse connections can burn out the clips;
3. Do not unplug the power cable during testing, as it can easily cause sparking and short circuits;
4. If the battery suddenly goes off, it automatically disconnects the battery. When power is restored, you can repeat the previous cycle and continue testing without starting over;
5. Supports channel parallel: 2 channels combined for up to 500A high current, testing high-power energy storage batteries.
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9. Summarize the entire logic in one sentence

1. This unit is a 24-channel 100V 50A energy-saving battery aging cabinet that automatically cycles to measure battery life and capacity;
2. By default, it can only measure total battery voltage; after selecting the 485/CAN communication module, it can communicate with the BMS protection board;
3. CAN parses battery messages via DBC, while RS485 reads individual data via Modbus registers. After reading the voltage and temperature of a single string, the device automatically protects to prevent overcharge and over-discharge from damaging the cells;
4. Discharging energy is recovered from the grid, significantly saving electricity compared to ordinary resistive aging cabinets, suitable for PACK factories, energy storage, and electric vehicle battery R&D and aging testing.