A lithium battery charging protection circuit
A technology for charging protection and lithium batteries, applied in safety/protection circuits, emergency protection circuit devices, measuring electricity, etc., can solve problems such as fuzzy concepts and misoperation of lithium battery control systems, avoid battery quality damage, and improve work efficiency , the effect of prolonging the service life
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Embodiment 1
[0012] Embodiment one: as attached image 3 shown. The lithium battery charging protection circuit disclosed in this embodiment includes a switch circuit connected between the negative terminal B- of the rechargeable battery and the negative terminal P- of the charger, and a charging signal detection circuit connected to the switch circuit for controlling the on-off of the switch circuit. The charging signal detection circuit includes a diode D1, a voltage regulator tube ZD1, a resistor R1, and a resistor R2 connected in series between the negative terminal P- of the charger and the negative B- of the rechargeable battery in sequence; the anode of the diode D1 is connected to the negative terminal P- of the charger. , the cathode of diode D1 is connected to the regulator end of regulator tube ZD1, and the other end of regulator tube ZD1 is connected to resistor R1 and resistor R2 in turn, and the connection point of resistor R1 and resistor R2 is used as the output terminal OU...
Embodiment 2
[0014] Embodiment two: as attached Figure 4 shown. The lithium battery charging protection circuit disclosed in this embodiment is an improvement on the basis of the first embodiment. Specifically, this embodiment includes a switch circuit connected between the negative terminal B- of the rechargeable battery and the negative terminal P- of the charger, and a charging signal detection circuit connected to the switch circuit for controlling the on-off of the switch circuit. The signal detection circuit includes a diode D1, a voltage regulator tube ZD1, a resistor R1, and a resistor R2 connected in series between the negative terminal P- of the charger and the negative B- of the rechargeable battery in sequence; the anode of the diode D1 is connected to the negative terminal P- of the charger, and the diode D1 The negative pole of D1 is connected to the regulator end of the voltage regulator tube ZD1, and the other end of the voltage regulator tube ZD1 is connected to the resi...
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