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Method for determining load current and battery sensor

A technology of load current and calibration current, applied in the direction of measuring current/voltage, only measuring current, instruments, etc., can solve the problems of expensive and troublesome materials for measuring resistance

Active Publication Date: 2017-10-03
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the embodiments according to the prior art have the disadvantage that the material required for measuring the resistance is expensive and requires a complex handling of the material

Method used

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  • Method for determining load current and battery sensor
  • Method for determining load current and battery sensor
  • Method for determining load current and battery sensor

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Embodiment Construction

[0047] described in more detail further below figure 1 with figure 2 Before proceeding, some general implementations are first given for the background of the invention.

[0048] As already explained in further detail above, the prior art is to use high-precision measuring resistors or shunt resistors composed of specific resistive alloys, which are especially based on (auf) their resistance relative to the initial Small deviations in the values ​​are optimized with respect to temperature and service life. In order to keep the electrical power loss realized in the measuring resistor as low as possible, the measuring resistor is set to a very small value of typically 0.1 mΩ by means of material selection and geometrical dimensions. Accordingly, when the current to be measured is in the range from 1 mA to 2000 A, the voltage across the measuring resistor is in the range from approximately 0.1 μV to 200 mV. In order to be able to measure these voltages, the measuring chain ge...

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PUM

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Abstract

The invention relates to a method for determining load current and a battery sensor, wherein a measuring resistance group is adopted; in the measuring resistance group, a calibrating current is introduced in corresponding calibrating period, and a measuring error is compensated. Furthermore, the invention relates to a battery sensor for implementing the method.

Description

technical field [0001] The invention relates to a method for determining a load current and to a related battery sensor which, in particular, can carry out such a method. Background technique [0002] To monitor the state of a battery, such as a vehicle battery, battery sensors are often used. In particular, this can be an accumulator. [0003] In the known embodiments, in particular measuring resistors are used, which are also referred to as shunt resistors and which are usually implemented temperature-stable and long-term stable. For this purpose, the measuring resistor can be formed, for example, from a copper-nickel-manganese alloy, in particular manganin. [0004] The measurement accuracy is based essentially on two factors, firstly on the accuracy with which the resistance of the measuring resistance can be known at any time, and secondly on the accuracy with which the voltage induced across the shunt by the current to be measured can be measured. [0005] However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R15/04G01R19/00
CPCG01R15/04G01R19/00G01R35/00G01R17/10G01R19/0092G01R31/006G01R31/382G01R35/005
Inventor A.奥默尔M.施拉姆
Owner CONTINENTAL AUTOMOTIVE TECH GMBH