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Battery voltage detecting circuit

A battery voltage detection and circuit technology, applied in the electronic field, can solve the problems of inrush current, complicated circuit, and reduced reliability.

Pending Publication Date: 2018-02-27
SHENZHEN STAR INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today's battery voltage detection method has a narrow range of battery voltage detection and cannot detect reverse battery voltage. If the battery is reversed, if the charger is directly charged, there will be a surge current, causing damage to the battery pack and hidden dangers to personal safety. , the existing separate circuit for battery voltage detection and battery reverse connection detection is more complicated, which increases the cost and reduces the reliability

Method used

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Embodiment 1

[0046] Please refer to figure 1 and figure 2 , Embodiment 1 of the present invention is:

[0047] A battery voltage detection circuit, comprising a voltage sampling module 2, an isolated operational amplifier module 3, a first operational amplifier module 4, a first filtering module 5 and a processor 6 connected in sequence, the voltage sampling module 2 is connected with the battery to be tested 1, and also includes a second op-amp module 7 and a second filter module 8 connected in sequence, the first op-amp module 4 is connected to the second op-amp module 7, and the second filter module 8 is connected to the processor 6 connected;

[0048] The first operational amplifier module 4 includes an eighth resistor, a ninth resistor, a tenth resistor, a fourteenth resistor, a first diode and a first operational amplifier chip. In an embodiment, the model of the first operational amplifier chip is OPA2348 , the first pin of the first operational amplifier chip is connected to th...

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PUM

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Abstract

The invention relates to a battery voltage detecting circuit. The battery voltage detecting circuit comprises a voltage sampling module, an isolating operational amplifier module, a first operationalamplifier module, a first filtering module and a processor which are connected in sequence, wherein the voltage sampling module is connected with a battery to be detected. The battery voltage detecting circuit also comprises a second operational amplifier module and a second filtering module which are connected in sequence, wherein the first operational amplifier module is connected with the second operational amplifier module, the second operational amplifier module is connected with the processor, and the battery voltage detecting range of the battery voltage detecting circuit is wide. The battery voltage detecting circuit is simple in structure, can achieve voltage detection of an electric vehicle battery before charging of a direct-current charging machine and can also detect the voltage during inversed connection of the battery.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a battery voltage detection circuit. Background technique [0002] Today's battery voltage detection method has a narrow range of battery voltage detection and cannot detect reverse battery voltage. If the battery is reversed, if the charger is directly charged, there will be a surge current, causing damage to the battery pack and hidden dangers to personal safety. , the existing separate circuit for battery voltage detection and battery reverse connection detection is relatively complicated, which increases cost and reduces reliability. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a battery voltage detection circuit with a wide detection range, a simple circuit and the ability to detect the voltage when the battery is reversed before the DC charger is charged. [0004] In order to solve the above technical problems, th...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01R15/08G01R15/04G01R15/16
CPCG01R15/04G01R15/08G01R15/16G01R31/396Y02E60/10
Inventor 娄震旦刘春华张平崔伟
Owner SHENZHEN STAR INSTR
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