Lithium battery protection board’s good or bad detection

Ensure that the sampling line(alignment) is correctly connected.

1,Take 7 Battery 8pin Lines as an example

B-wire connection battery total negative electrode

B1 wire connected to the first battery positive pole

B2 wire connected to the second battery positive pole

B3 line connected to the third battery positive pole

B4 wire connected to the fourth battery positive pole

B5 wire connected to the fifth battery positive pole

The B6 line is connected to the sixth battery positive pole

The B7 line connects to the 7th battery positive pole

PS: The positive pole of the seventh string of 7 cells is also the total positive pole, and the same can be pushed to any string battery.

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

2,Make sure the battery wiring is correct through a multi-meter.

1, by pressing the B-line terminal and the universal watch red pen to press the B1 line terminal with the universal watch black pointer, the first battery voltage is 3.584V.

2, by pressing the B1 line terminal and the universal watch red pen to press the B2 line terminal with the universal watch black pointer, the second battery voltage is 3.584V.

.. .. ..

3, measured by this method, to obtain:

Battery voltage for first battery: 3.584V

Battery voltage 2: 3.584V

Battery voltage 3: 3.585V

Battery voltage 4: 3.585V

Battery voltage 5: 3.583V

The sixth battery voltage: 3.583V

Battery voltage 7: 3.584V

The seven voltages are 3.58 V, the wiring is correct, and the battery voltage difference is less than 0.002 V, and the battery consistency is good. PS: Each battery voltage should be: lithium ternary voltage at 3.0-2 .2 V; lithium iron phosphate voltage 2.0-3 .6 V; lithium titanate is about 1.5-2 .75 V. If there is a difference of more than 2V in any series of voltages, it indicates that the wiring is wrong and needs to be rewired.

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

3,After measuring the voltage is normal, insert the cable into the protective plate and measure the resistance between the protective plate B-and P-. The resistance is 0, indicating that they have been unimpeded and the protective plate is good.

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

4,Or you can measure the voltage of B-and the total positive of the battery and the voltage of P-and the total positive of the battery by connecting to the B-line

The voltage is the same, indicating that the protective plate is normal(the protective plate is equivalent to a switch, the switch has been turned on, and the current can be safely passed)

The sample test shows that the total positive voltage from B-to the battery is 25.11 VP-to the total positive voltage of the battery is 25.11 V.

The two voltages agree that the plate is normal. If the P-discharges through a large current, there will be a slight pressure drop, and the protective plate is hot(about 50 degrees), which is a normal phenomenon.

Detection of Lithium Battery Protection Plate

Detection of Lithium Battery Protection Plate

END

matters needing attention

When measuring each voltage, the pen is correctly placed, and it will short-circuit smoke when encountered.

When connecting the plate, be sure to wire up the plate and plug it in. Plugging the plate into the plate may cause the plate to burn out.

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