Battery voltage detection circuit, vehicle and mobile phone

A battery voltage detection and circuit technology, which is applied in the battery voltage detection circuit, vehicles and mobile phones, can solve the problem of A/D conversion module being awakened again, and achieve the purpose and advantages of concise and easy-to-understand effect

Pending Publication Date: 2022-05-13
浙江华锐捷技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In this embodiment, a battery voltage detection circuit, a vehicle and a mobile phone are

Method used

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  • Battery voltage detection circuit, vehicle and mobile phone
  • Battery voltage detection circuit, vehicle and mobile phone
  • Battery voltage detection circuit, vehicle and mobile phone

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Embodiment Construction

[0037] In order to understand the purpose, technical solution and advantages of the present application more clearly, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0038] Unless otherwise defined, the technical terms or scientific terms involved in the application shall have the general meanings understood by those skilled in the technical field to which the application belongs. In this application, words like "a", "an", "an", "the", "these" and the like do not denote quantitative limitations, and they may be singular or plural. The terms "comprising", "comprising", "having" and any variants thereof referred to in this application are intended to cover non-exclusive inclusion; for example, processes, methods and The system, product or device is not limited to the steps or modules (units) listed, but may include steps or modules (units) not listed, or may include other steps or modules inherent to the...

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Abstract

The invention relates to a battery voltage detection circuit, a vehicle and a mobile phone, and the battery voltage detection circuit comprises a voltage dividing module, a voltage following module and an A/D conversion module. An interface at one end of the voltage dividing module is connected with the output end of the battery, and the voltage dividing module is used for dividing the output voltage of the battery and inputting the divided voltage to the voltage following module; the voltage following module is connected with an interface at the other end of the voltage dividing module and is used for detecting the divided voltage and outputting a voltage detection signal; the voltage following module comprises a first transistor and a second transistor, one end of the first transistor is connected with the other end interface of the voltage dividing module, and the other end is connected with one end of the second transistor; the first transistor and the second transistor are complementary pair transistors, and the second transistor is a reverse cut-off device; according to the battery voltage measuring circuit, the problem that the A/D conversion module is awakened again is solved, and accurate measurement of the battery voltage is achieved.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to battery voltage detection circuits, vehicles and mobile phones. Background technique [0002] Vehicle-mounted devices, mobile phones and other devices need to detect the power supply voltage of the battery, and automatically enter low power consumption or shut down the device when the battery power supply voltage is lower than a certain threshold to prevent the battery from being over-discharged. [0003] In the existing solution, the battery voltage is mainly divided by resistors, and then the battery voltage is detected by using AD acquisition. However, the battery is always in the device, and the voltage of the battery output interface will always exist when the device is sleeping or shutting down. Therefore, the battery output voltage will flow back to the A / D conversion module through the voltage dividing resistor, causing the A / D conversion module to wake up agai...

Claims

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Application Information

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IPC IPC(8): G01R31/3835
CPCG01R31/3835
Inventor 余成林高松全
Owner 浙江华锐捷技术有限公司
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