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A simple and reliable battery over-discharge protection circuit

A technology of discharge protection and battery voltage, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of untimely circuit restart, complex structure of battery over-discharge protection circuit, etc., and achieve fast circuit restart, high overall reliability, and high reliability. Simple control method

Active Publication Date: 2018-07-06
GUANGDONG REAL DESIGN INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and reliable battery over-discharge protection circuit in order to solve the problems of complex structure of the battery over-discharge protection circuit in the prior art and the untimely restart of the circuit

Method used

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  • A simple and reliable battery over-discharge protection circuit

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specific Embodiment 1

[0015] refer to figure 1 , this embodiment includes MOS transistor Q1, thyristor U1, resistors R1-R8, capacitors EC1 and C1, and diode D1; the source of MOS transistor Q1 is connected to battery voltage terminal VBAT and grounded to GND through capacitor EC1; the drain of MOS transistor Q1 The pole is connected to the load voltage output terminal Vout to form a discharge circuit from the MOS tube Q1 to control the battery voltage terminal VBAT to the load voltage output terminal Vout; the gate of the thyristor U1 is reversely connected to the external power supply input terminal Vcc in through the diode D1 and the resistor R8. The cathode of the thyristor U1 is connected to the gate of the MOS transistor Q1 through the resistor R2 to form a restart circuit of the MOS transistor Q1; the resistor R1 is connected between the source and the gate of the MOS transistor Q1, and the gate of the thyristor U1 is connected through the resistor R3 , R4 is connected to the drain of MOS tra...

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Abstract

The invention relates to a simple and reliable battery over-discharge protection circuit, which is characterized in that it includes MOS transistor Q1, thyristor U1, resistor R1-R8, capacitor EC1 and C1, and diode D1; the source of MOS transistor Q1 is connected to the battery voltage The terminal VBAT, the resistor R1 is connected between the source and the gate of the MOS transistor Q1, the gate of the MOS transistor Q1 is connected to the cathode of the thyristor U1 through the resistor R2, the drain is connected to the output terminal Vout and connected through the resistors R3 and R4 The gate of thyristor U1, resistors R5, R7 and capacitor C1 are connected in parallel and connected between the gate and anode of thyristor U1; the battery voltage terminal VBAT is connected to the gate of thyristor U1 through resistor R6, and external power supply The terminal Vcc in is connected to the gate of the thyristor U1 through the resistor R8 and the diode D1. The invention can effectively solve the problem of excessive discharge of the battery caused by the virtual voltage of the battery, and has the characteristics of controlling the restart of the load, preventing deep over-discharge of the battery, and prolonging the service life of the battery.

Description

Technical field: [0001] The invention relates to a simple and reliable battery over-discharge protection circuit, which is suitable for the protection of charging / discharging batteries of solar energy storage devices. The invention belongs to the technical field of switching power supplies and controllers in new energy systems. Background technique: [0002] Today, with the increasingly serious problems of energy depletion and environmental pollution, the development and utilization of new energy sources are getting more and more attention. Solar energy has been gradually developed and utilized due to its advantages of cleanness, environmental protection and rich reserves. Various solar energy systems have gradually entered people's lives. As important energy storage devices, rechargeable / dischargeable batteries have also been widely used, such as lead-acid batteries , lithium batteries, etc. This type of battery can be charged by solar energy, and then supply power to dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/18
Inventor 汪军张艳平幸兴
Owner GUANGDONG REAL DESIGN INTELLIGENT TECH
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