Battery car low-voltage detection and alarm circuit

An alarm circuit and low-voltage detection technology, applied in the direction of measuring current/voltage, measuring electricity, measuring devices, etc., can solve problems such as no electricity, achieve the effect of simple detection method, simple structure, and solve the problem of vehicle-mounted static electricity protection

Inactive Publication Date: 2014-02-26
CHENGDU JINGLIN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no one has thought of the need to detect the voltage of the battery circuit to solve the problem of suddenly running out of power when driving halfway.

Method used

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  • Battery car low-voltage detection and alarm circuit

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Embodiment 1

[0016] see figure 1 , battery car low-voltage detection and alarm circuit, including the battery voltage output terminal, detection circuit and alarm circuit, the detection circuit includes a comparator, the battery voltage output terminal is connected with a resistor R1, the output terminal of the resistance R1 and the comparator The negative input terminal of the comparator is connected, the resistor R1 is connected to the input terminal of the resistor R2, the output terminal of the resistor R2 is grounded, the positive input terminal of the comparator is connected to the base of the triode, and the output terminal of the comparator It is connected to the gate of the MOS tube, the drain of the MOS tube is connected to the alarm circuit, the source of the MOS tube is connected to the resistor R3, the resistor R3 is connected to the emitter of the triode and both are grounded, and the collector of the triode It is connected with the resistor R4, and the resistor R4 is connect...

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PUM

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Abstract

The invention discloses a battery car low-voltage detection and alarm circuit. The battery car low-voltage detection and alarm circuit comprises a storage battery voltage output end, a detection circuit and an alarm circuit. When the detection circuit detects that a storage battery voltage decreases to an alarm value and the negative input end of a comparator is lower than a triode threshold voltage, the comparator outputs high level, a MOS tube is conducted, an LED lamp emits light and brightens, and power amplifier alarm is realized, then it can be acknowledged that the storage battery voltage is at a low voltage state such that the purpose of the invention is realized. The invention relates to the battery car low-voltage detection and alarm circuit, the detection method is simple, and people can be prompted to charge a battery car during use so as to reduce unnecessary trouble.

Description

technical field [0001] The invention relates to a low-voltage detection and alarm circuit, in particular to a low-voltage detection and alarm circuit for battery cars. Background technique [0002] The low speed and limited charging range of battery cars are not disadvantages, but their quietness and low maintenance cost make them popular. Electric cars competed with gasoline cars until 1920, when electric cars began to dwindle as electric starters made gasoline-powered cars more attractive, and mass production made gasoline cars cheaper. In Europe, electric vehicles have been used as short-range delivery vehicles. Since the 1970s, countries have renewed their interest in electric vehicles, especially due to the impact of not relying on foreign oil and environmental issues, resulting in repeated improvements in the speed and driving distance of battery vehicles. However, no one has thought of the need to detect the voltage of the battery circuit to solve the problem of su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165G01R31/36
Inventor 殷刚
Owner CHENGDU JINGLIN ELECTRONICS TECH
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