CN202737450U - Over-discharge protector of storage battery - Google Patents

Abstract

The utility model discloses an over-discharge protector of a storage battery. The over-discharge protector comprises a voltage comparator, an adjustable voltage regulator tube, a relay, a potentiometer, a light-emitting diode, a button switch, a storage battery, a first resistor, a second resistor, a capacitor and a diode. When the button switch is pressed, the storage battery supplies the power to a protection circuit, the relay is energized and attracted, and a contact of the relay is self-protected, and the storage battery and a load are switched on. After the button switch is released, the storage battery continuously supplies the power, simultaneously the light-emitting diode emits the light to represent the discharge state; when the storage battery discharges to the given final voltage, the comparator overturns, the relay is de-energized, the load and the protector are respectively disconnected with the storage battery, and the over-discharge is avoided. An external power supply is not needed, and the protector is energized by the storage battery protected by the protector, thus once the voltage of the storage battery is the given final voltage, the compositing of the storage battery, and the protection circuit are respectively switched off. The utility model has the advantages of simple structure, small volume, low cost, convenient use, and convenient popularization.

Description

Battery over-discharge protector

technical field

The utility model relates to an additional device of a battery, in particular to a battery over-discharge protector. the

Background technique

The lower limit of the battery voltage is the end-of-discharge voltage. If the battery voltage is lower than this voltage and continues to discharge, the performance will decrease at least, and a fire will occur at the worst. The battery over-discharge protection circuit in the prior art requires an additional power supply, which has a complex structure, large volume, and high cost. the

Contents of the invention

The purpose of this utility model is to provide a battery over-discharge protector in order to solve the above problems. the

The utility model realizes above-mentioned purpose through following technical scheme:

The utility model comprises a voltage comparator, an adjustable voltage regulator tube, a relay, a potentiometer, a light-emitting diode, a button switch, a storage battery, a first resistor, a second resistor, a capacitor and a diode. The first end of the relay, the first end of the first normally open switch of the relay and the first end of the second normally open switch of the relay are connected, and the negative pole of the battery is connected with the negative pole of the consumer and the light emitting diode at the same time. The negative pole, the first end of the capacitor, the negative power supply input end of the voltage comparator, the positive pole of the adjustable voltage regulator tube are connected to the first end of the potentiometer, and the second end of the potentiometer is simultaneously and the first terminal of the first resistor, the positive power supply input terminal of the voltage comparator, the second terminal of the capacitor, the negative terminal of the diode, the first terminal of the relay, and the second resistor The first end, the second end of the first normally open switch of the relay are connected to the second end of the button switch, the sliding end of the potentiometer is connected to the negative signal input end of the voltage comparator, and the first end is connected to the negative signal input end of the voltage comparator. The second end of a resistor is connected with the negative pole of the adjustable voltage regulator tube and the positive pole signal input terminal of the voltage comparator at the same time, and the output terminal of the voltage comparator is connected with the positive pole of the diode and the positive pole of the relay at the same time. connected to the second end, the second end of the second resistor is connected to the anode of the light emitting diode, and the second end of the second normally open switch of the relay is connected to the anode of the consumer. the

The beneficial effects of the utility model are:

The utility model does not need an external power supply, but is powered by the protected storage battery. Once the discharge termination voltage is reached, the composite and protection circuits of the storage battery are cut off. The utility model is simple in structure, small in size, low in cost, convenient to use, and easy to popularize . the

Description of drawings

Fig. 1 is the schematic diagram of the circuit structure of the utility model. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1: the utility model includes a voltage comparator IC1, an adjustable voltage regulator IC2, a relay RL, a potentiometer W, a light-emitting diode LED, a button switch SW, a storage battery, a first resistor R1, a second resistor R2, a capacitor C and diode D, the positive pole of the battery is connected to the first end of the button switch SW, the first end of the first normally open switch of the relay RL and the first end of the second normally open switch of the relay RL at the same time, and the negative pole of the battery is simultaneously connected to the The negative pole of the electrical appliance, the negative pole of the light-emitting diode LED, the first end of the capacitor C, the negative power supply input end of the voltage comparator IC1, the positive pole of the adjustable voltage regulator IC2 are connected to the first end of the potentiometer W, and the first end of the potentiometer W The two terminals are simultaneously connected with the first terminal of the first resistor R1, the positive power supply input terminal of the voltage comparator IC1, the second terminal of the capacitor C, the negative pole of the diode D, the first terminal of the relay RL, and the first terminal of the second resistor R2 1. The second terminal of the first normally open switch of the relay RL is connected with the second terminal of the button switch SW, the sliding terminal of the potentiometer W is connected with the negative signal input terminal of the voltage comparator IC1, and the second terminal of the first resistor R1 is connected with the The negative pole of the adjustable voltage regulator IC2 is connected to the positive signal input terminal of the voltage comparator IC1, the output terminal of the voltage comparator IC1 is connected to the positive pole of the diode D and the second terminal of the relay RL at the same time, and the second terminal of the second resistor R2 It is connected with the anode of the light-emitting diode LED, and the second end of the second normally open switch of the relay RL is connected with the anode of the consumer. the

As shown in Figure 1: the 12V battery is used as the protection object, and it can also be used for battery protection of other voltages. The non-inverting input terminal of the voltage comparator IC1 is connected to the 5V reference voltage, which is provided by the adjustable voltage regulator IC2, and the inverting input The terminal is connected to the terminal voltage of the protected battery through the potentiometer W, and the potentiometer W is used to adjust the protection voltage. Here, it is adjusted to the end-of-discharge voltage of the 12V battery at 10V; when the button switch SW is pressed, the battery supplies power to the protection circuit, and the relay RL gets When the contact is self-protected, it also connects the battery and the load. After the button switch SW is released, the battery continues to supply power, and the light-emitting diode LED lights up at the same time, indicating that it is in a discharge state; when the battery discharges to the set end After the voltage (10V), the comparator reverses, the relay loses power, the load and the protector are disconnected from the battery, and over-discharge is avoided. the

Claims (1)

1. accumulator over discharging protector; it is characterized in that: comprise voltage comparator; adjustable voltage-stabiliser tube; relay; potentiometer; light-emitting diode; push-button switch; storage battery; the first resistance; the second resistance; electric capacity and diode; the anodal while of described storage battery and the first end of described push-button switch; the first end of described relay the first normal open switch be connected the first end of the second normal open switch of relay and connect; the negative pole while of described storage battery and the negative pole of electrical appliance; the negative pole of described light-emitting diode; the first end of described electric capacity; the negative power supply input of described voltage comparator; the positive pole of described adjustable voltage-stabiliser tube be connected the first end of potentiometer and connect; the second end while of described potentiometer and the first end of described the first resistance; the cathode power supply input of described voltage comparator; the second end of described electric capacity; the negative pole of described diode; the first end of described relay; the first end of described the second resistance; the second end of described relay the first normal open switch be connected the second end of push-button switch and connect; the sliding end of described potentiometer is connected with the negative signal input of described voltage comparator; the second end of described the first resistance simultaneously with the negative pole of described adjustable voltage-stabiliser tube be connected the positive signal input of voltage comparator and be connected; the output of described voltage comparator simultaneously with the positive pole of described diode be connected the second end of relay and be connected; the second end of described the second resistance is connected with the positive pole of described light-emitting diode, and the second end of the second normal open switch of described relay is connected with the positive pole of described electrical appliance.

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