18650 lithium batteries can be connected in series or parallel. They must be balanced, managed and associated with protection circuits. For example, the power supply of a “Tesla” electric car relies on a battery composed of a large number of 18650 lithium batteries, and the battery of a laptop computer is also composed of several 18650 lithium batteries. /p>
The circuit diagram is as follows:
Working principle:
When the battery voltage is between 2.5V and 4 ,3 V, the first and second pins of DW01 All 3 pins output high level (equal to the supply voltage) and the voltage of the second pin is 0 V. At this time, the voltage of pins 1 and 3 of the DW01 will be added to pins 5 and 4 of the 8205A respectively. The two electronic switches of the 8205A are in a conducting state because their G pole is connected to the voltage of the DW01, i.e. ,both electronic switches are on. At this time, the negative electrode of the battery is directly connected to the P terminal of the protection board, and the protection board has voltage output.
Detailed informationMain functions: overcharge protection function, overdischarge protection function, short circuit protection function, overcurrent protection function, overheat protection function, equalization protection function.
Interface definition: The charging port and discharge port of the board are independent of each other and share the positive electrode B- is the negative electrode connected to the battery, C- is the negative electrode. of the charging port; P- is the negative electrode of the discharge port; pads B, P and C are all through-hole type and the diameter of pad holes is 3mm for each sensing interfacebattery charge ; was released as a DC pin holder.
Parameter description: Configuration of maximum operating current and overcurrent protection current value, unit: A (5/8, 8/15, 10/20, 12/25, 15 /30, 20/40, 25 /35, 30/50, 35/60, 50/80, 80/100), special overcurrent values can be customized according to customer requirements.
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