Self-repairing circuit diagram of nickel-cadmium nickel-hydrogen battery

The outer diameter of the probe domestically produced PL50-T diamond head nickel-plated needle is 0.68mm.

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This circuit automatically repairs the battery. When using, connect the power supply VCC to the +12V of the switching power supply, and connect the two points A and B to the positive and negative terminals of the battery respectively (a dedicated battery box can be used, or the battery box can be self-made to connect the battery to the circuit), and the circuit is made after power-on. The automatic intermittent operation causes a large current intermittent "shock" on the battery, and gradually activates the battery in the "sleep" state. If the primary battery is not charged when it is normally charged, the battery is basically activated when the LEDI is shining; if there is a short circuit inside the primary battery, the large current is shocked after a suitable time, when the LED 2 is shining, the battery is basically Back to normal. Since the high current "shock" time is short (this circuit is designed to be about 200ms), the intermittent time is long enough (about 10s), so the battery will not heat up and will not be harmed. The circuit consists of a LM555 integrated block and Rl, R2, Dl, C2 to form a multivibrator. The LM555's 3 pin outputs a low-level (about 200ms) low-level (about lOs) periodic pulse signal. The periodic pulse signal controls the conduction and deactivation of 01.

When the signal is high, .01 is turned on, and the 12V power supply voltage is applied to the battery. Due to the high voltage, the battery is subjected to high voltage and high current "shock" in a short time; when the signal is low, Ql When the circuit is off, the circuit does not power up the battery. At this time, Q1 and the battery are cooled. In the case of fixed C2, adjust Rl to adjust the width of the LM555's (3) pin output high level Tl, that is, the time of high current "shock" the battery. T1 ≈ 0, 693xRlxC2; adjust R2 to control the low output of the LM555 3 pin The width of the level T2 ensures that the Q1 and the battery do not overheat. T2≈0.693xR2xC2. Ql in the circuit should use a high current high amplification multiple of 20A or more (this circuit uses the disassemble Darlington triode MJ11032). In this circuit, due to Q1 conduction time (0.2 seconds) relative to the cutoff time (1O seconds) It is extremely short, so there is no need to add a heat sink to Ql. Vcc receives the +12V of the waste computer switching power supply. The switching power supply has the functions of large current and overcurrent protection, which is suitable for the circuit. Power resistors are required for R3 and R6. The unit of resistance in the figure is kΩ. The unit of capacitance is μF, and the withstand voltage of electrolytic capacitor is 35V.