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High-end sampling battery voltage circuit

A battery voltage circuit, terminal voltage technology, applied in the direction of measuring current/voltage, measuring electrical variables, measuring devices, etc., can solve problems such as difficulty in measuring a single battery

Inactive Publication Date: 2014-01-01
深圳市沛城电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-end sampling battery voltage circuit, which aims to solve the problem of difficult measurement of a single battery in a series battery pack in the prior art

Method used

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Embodiment Construction

[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0014] Such as figure 1 A preferred embodiment of the high-end sampling battery voltage circuit of the present invention is shown, including a battery terminal voltage acquisition circuit 1 and an equivalent measurement circuit 2. The batteries BT1, BT2, BT3, and BT4 are connected in series to form a battery pack, and the battery BT4 is the battery to be tested; The battery terminal voltage acquisition circuit 1 is connected to both ends of the battery under test BT4, the battery terminal voltage acquisition circuit 1 is connected to the equivalent measurement circuit 2, and the battery termi...

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Abstract

The invention provides a high-end sampling battery voltage circuit which comprises a battery end voltage acquisition circuit and an equivalent measurement circuit. The battery end voltage acquisition circuit is connected with the equivalent measurement circuit, the battery end voltage acquisition circuit is used for obtaining voltage of a battery to be measured, and the equivalent measurement circuit is used for distance measurement for the obtained voltage of the battery to be measured. According to the technical scheme of the high-end sampling battery voltage circuit, defects in the prior art are overcome, the problem of low measurement precision caused by a voltage difference generated by non-common-ground link between the battery and an MCU is ingeniously resolved, the requirement of the voltage sampling circuit for precision is not high, good measurement precision can be obtained by means of a common main control chip with an ADC, and cost of products is greatly reduced.

Description

Technical field [0001] The invention belongs to the field of voltage sampling circuits, and particularly relates to a high-end sampling battery voltage circuit. Background technique [0002] The key to monitoring the working status of the battery is to collect the voltage and current signals of the battery terminal. The power battery pack is the core of the power tool energy system. Its comprehensive performance is determined by the worst-performing single cell in the series battery pack. During the charging and discharging of the battery, any overshoot or overdischarge of the single cell will reduce the overall battery pack’s performance. Performance and service life, so the voltage acquisition unit must be able to accurately measure the voltage of the single battery. Since there are a large number of batteries in a series battery pack, the voltage of the whole group is high, and there is a potential connection between each battery, it is difficult to directly measure the termi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 封毅
Owner 深圳市沛城电子科技有限公司
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