Automatic power-off protection circuit for overload and short circuit of storage battery

A protection circuit and automatic power-off technology, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc., can solve problems such as circuit short circuit, battery overload, electrical damage, etc., and achieve simple device structure and convenient Installation and commissioning, the effect of improving the service life

Active Publication Date: 2017-08-18
LUAN TONGXIN CHANGNENG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the battery is over-discharged for a long time, that is, overloaded, it will seriously affect its service life
The starter motor is used for too long, the circuit is short-circuited, and the electrical appliance is damaged are the main causes of battery overload
In particular, the consequence

Method used

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  • Automatic power-off protection circuit for overload and short circuit of storage battery

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Embodiment

[0011] like figure 1 As shown, a battery overload and short-circuit automatic power-off protection circuit includes a BT1 battery and a BT2 battery. The negative terminal of the BT1 battery is connected in series with the L1 inductor, and the J1-1 normally closed contact is connected to the positive terminal of the BT2 battery. The BT1 The negative end of the storage battery is connected to pin 1 of the IC1 photocoupler through the R1 resistor, and pin 2 of the IC1 photocoupler is connected between the L1 inductor and the normally closed contact of J1-1, and pin 4 of the IC1 photocoupler Connected to the positive terminal of the BT2 storage battery, the 3 pins of the IC1 photocoupler are connected to the negative pole of the D2 diode, one end of the R6 resistor, the positive pole of the D3 diode, one end of the R8 resistor and the collector of the Q4 transistor; the positive pole of the D2 diode is connected to The other end of the R6 resistor, the R6 resistor is connected to ...

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Abstract

The invention provides an automatic power-off protection circuit for overload and short circuit of a storage battery, and relates to a storage battery protection circuit. The automatic power-off protection circuit comprises a storage battery BT1 and a storage battery BT2, and is characterized in that a negative electrode end of the storage battery BT1 is connected with an inductor L1 in series, a normally-closed contact J1-1 is connected to a positive electrode end of the storage battery BT2, the negative electrode end of the storage battery BT1 is connected to a pin 1 of a photoelectric coupler IC1 through a resistor R1, a pin 2 of the photoelectric coupler IC1 is connected to a part between the inductor L1 and the normally-closed contact J1-1, a pin 4 of the photoelectric coupler IC1 is connected to a positive electrode end of the storage battery BT2, and a pin 3 of the photoelectric coupler IC1 is connected to a negative electrode of a diode D2, one end of a resistor R6, a positive electrode of a diode D3, one end of a resistor R8 and a collecting electrode of a triode Q4. The automatic power-off protection circuit can prompt that a circuit to which the storage battery is connected has an overload or short circuit fault. The whole device is simple in structure and convenient to install and debug, plays a role of protecting the storage battery and prolonging the service life of the storage battery, and is conducive to preventing a fire, which is caused by a short circuit, of an automobile circuit.

Description

technical field [0001] The invention relates to a storage battery protection circuit, in particular to a storage battery overload and short-circuit automatic power-off protection circuit. Background technique [0002] The car battery is the energy guarantee for the normal operation of the car, and its life is related to the balance of charging and discharging at ordinary times. When the battery is over-discharged for a long time, that is, overloaded, it will seriously affect its service life. The starter motor is used for too long, the circuit is short-circuited, and electrical damage is the main cause of battery overload. Especially the consequences caused by the short circuit are the most serious. Since the main circuit generally does not install fuses to meet the requirements of the starting current of the engine starter motor, the short circuit not only causes damage to the battery, but also is an important cause of automobile fires. Contents of the invention [0003...

Claims

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Application Information

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IPC IPC(8): H02H7/18H02H3/04
CPCH02H3/042H02H7/18
Inventor 刘举柱
Owner LUAN TONGXIN CHANGNENG ELECTRONICS TECH CO LTD
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