How to make a battery negative pulse protection device? The main purpose is to make a negative pulse generator with a simple structure, and use this negative pulse to eliminate the vulcanization phenomenon on the battery plate.
This electric car battery maintainer is a negative pulse generator with a simple structure and easy to manufacture. It can absorb the battery's electric energy and turn it into a pulse voltage much higher than the battery voltage to maintain the battery. This negative pulse is used to eliminate the battery. Vulcanization on the battery plate.
The principle of the device is shown in the figure. The working process is as follows: the battery voltage is charged to C1 and C2 through R1, L1 and R2, L2. When the voltage across the trigger diode reaches its trigger voltage, the trigger diode is turned on, and the voltages on C1 and C2 are connected in series to form a voltage higher than the battery. A pulse of much the same polarity. Because L1, R1 and L2, R2 have a much larger impedance to the pulse than the battery, this pulse current is essentially released through the battery to repair the sulfide on the plate. When the voltage across the diode is insufficient to maintain its conduction, the trigger diode is turned off and the circuit performs the next charge cycle.
The selection of components here should be noted: because the key to this device is whether the trigger diode can be continuously turned on and off, depending on its trigger voltage and the battery voltage that needs to be maintained. In the case of batteries with voltages of 36V and 48V, the bidirectional trigger diode DB32 on the dimming table lamp board can be used directly without polarity limitation. If the battery voltage is 12V or 6V, you can connect several batteries in series to repair, or use the trigger diode corresponding to the trigger voltage. Inductors Ll, ​​L2 can use the mutual inductance coil in the leakage protector, or can use the magnetic core high-frequency choke coil on the waste energy-saving lamp circuit board. Capacitors C1 and C2 should be withstand voltage of 63V. The size of the capacitor determines the frequency and intensity of the pulse. The capacity is small and the frequency is high, and the capacity is large and low. However, the pulse has a medium intensity. Generally, it is selected between 22μF and l00μF. It should not be chosen too much. If the capacity is too large, the discharge current will be too large and the trigger diode will be burned off. R1, R2 resistance power 0.5W, resistance value is generally between 2kΩ ~ 5kΩ, too small, the trigger diode can not be turned off after conduction, too much capacitance C, C2 charging time is extended, the pulse frequency becomes lower, so that the repair time is prolonged .
After assembly, you can connect the battery test, use the multimeter 50V DC voltage to measure the voltage across the trigger diode. If the pointer of the multimeter is not shaking when it is lower than the power supply voltage, it means that the device has generated pulse voltage and works normally. If the pointer does not shake below a certain voltage of the power supply, it may be that the resistance of the resistors R1 and R2 is too low, so that the trigger diode cannot be turned off or the trigger diode itself is faulty; if the measured voltage is the power supply voltage and the hands are not shaken, the trigger diode is triggered. The voltage is too high or the battery voltage is too low. The device itself consumes very little current and can be connected to the battery for maintenance work.
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