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Battery current measuring device and method

A battery current and measuring device technology, applied in battery circuit devices, measuring devices, circuit devices, etc., can solve the problems of shunt resistor occupation, cost increase, large volume, etc., and achieve volume reduction, cost and efficient production process Effect

Pending Publication Date: 2021-11-19
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since these shunt resistors also occupy a large volume and add cost, assembly process, etc., a better solution is needed

Method used

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  • Battery current measuring device and method
  • Battery current measuring device and method
  • Battery current measuring device and method

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Embodiment Construction

[0032] Hereinafter, some embodiments of the present invention will be described in detail by way of exemplary drawings. It should be noted that in assigning reference numerals to components of each drawing, the same reference numerals refer to the same components even though the components are shown on different drawings. Also, in describing the inventive concept, if it is determined that a detailed description of a well-known configuration or function would make the subject matter of the inventive concept unclear, the detailed description is omitted.

[0033] To address the above-described shunt resistor problem, the present invention includes a method and apparatus that can measure current using the essential components of a battery to measure battery current without the use of a shunt resistor.

[0034] Generally, a switching element for controlling charging and discharging by turning on / off the battery must basically exist, and the switching element includes a semiconducto...

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Abstract

The present invention includes a battery current measuring device comprising: a switching element for controlling the charging / discharging of a battery; an A / D converter for converting the voltages at both ends of the switching element to digital values; a temperature compensation unit comprising a diode structure capable of compensating for resistance variation resulting from temperature variation of the switching element; and a current calculation unit for calculating a current flowing in the switching element on the basis of the digital values of the voltages, wherein the A / D converter converts the voltage values of the switching element to digital values by using a reference voltage inputted from the temperature compensation unit.

Description

technical field [0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0001151 filed on January 4, 2019, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a battery current measurement device and method. In particular, the present invention relates to apparatus and methods for measuring battery current without the use of shunt resistors. Background technique [0004] The charge / discharge current of the battery must be measured to calculate / calculate not only the output, but also battery information (eg, battery degradation information and battery capacity). Furthermore, in order to accurately calculate the battery information, precise measurement accuracy is required, and to meet this requirement, conventionally, a precision resistor such as a shunt is used to measure the battery current. [0005] Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842G01R31/374G01R19/25G01R19/32
CPCG01R19/32G01R31/382G01R19/0092G01R31/374G01R31/3842G01R19/25G01R31/392H02J7/00712H02J7/0047
Inventor 李沅泰李昌馥黄圣泽
Owner LG ENERGY SOLUTION LTD