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Current detection device, system and method

A current detection device and current detection technology, applied in the direction of using digital measurement technology for measurement, etc., can solve the problem of high current detection cost, achieve the effect of small overall structure, reduced cost, and clear and easy-to-understand circuit connection

Pending Publication Date: 2018-06-26
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a current detection device, a current detection system and a current detection method to solve the problem of high cost of current detection in the existing battery management system

Method used

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Embodiment 1

[0047] figure 1 is the structural diagram of the current detection device of the present invention, as figure 1 As shown, this embodiment provides a current detection device 1, the current detection device 1 is used in a battery management system, and the current detection device 1 includes a current signal port, a first sensing device 11 and a second sensing device 12 , wherein: the first sensing device 11 is used to detect the current flowing through the current signal port and obtain a first current detection signal; the second sensing device 12 is used to detect the current flowing through the first sensing device current and obtain a second current detection signal. In order to meet the safety level ASIL C requirements and high precision requirements of the battery management system, this technical solution has two current acquisition channels. The high-precision shunt resistor is used as the sensitive element of the main signal acquisition, and the Hall sensor is used ...

Embodiment 2

[0055] figure 2 It is the architecture diagram of the current detection system of the present invention, such as figure 2 As shown, this embodiment also provides a current detection system, the current detection system includes a current detection device 1, a controller 2 and a signal processor 3, wherein: the current detection device 1 is connected to the signal processor 3, The first current detection signal is sent to a signal processor 3, and the signal processor processes the first current detection signal; the current detection device 1 is connected to the controller 2, and the second The current detection signal is sent to the controller 2, and the controller receives the second current detection signal; the signal processor 1 is connected to the controller 2, and the first current detection signal is sent to the controller, and the The controller receives the first current detection signal, and compares the first current detection signal with the second current dete...

Embodiment 3

[0063] This embodiment provides a current detection method of a current detection system. The current detection method of the current detection system includes: the first sensing device detects the current flowing through the current signal port and obtains a first current detection signal, The first sensing device sends the first current detection signal to the signal processor; the signal processor performs signal processing on the first current detection signal and sends it to the controller; the second sensing device detects the flow through the The current of the first sensing device and obtain the second current detection signal, the second sensing device sends the second current detection signal to the controller, and the controller receives the first current detection signal and the second current detection signal After receiving the signal, the first current detection signal is compared with the second current detection signal, and if the difference between the first c...

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Abstract

The invention provides a current detection device, system and method. The current detection device comprises a current signal port, a first sensing device and a second sensing device, the first sensing device detects a current passing the current signal port and obtains a first current detection signal, the second sensing device detects a current passing the first sensing device and obtains a second current detection signal, the first sensing device includes a high-precision shunting resistor, and the second sensing device includes a Hall current sensor or a flux gate sensor; and a controllerin the current processes the first and second current detection signals to obtain a final detection signal. According to the invention, the high-precision shunting resistor serves as a main current collection sensor, the sampling precision can reach 0.5%, requirements of a battery management system can be met, the Hall sensor serves as a redundant current sampling portion, the cost of a current scheme of a double AD sampling high-precision shunting resistor is reduced.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a current detection device, a current detection system and a current detection method. Background technique [0002] There are two main forms of current sensors used in power battery management systems, Hall-type current sensors and high-precision shunt resistance current sensors. The Hall-type current sensor is composed of a Hall chip and a magnetic ring. The straight wire passes through the magnetic ring, and the wire current generates an induced magnetic field in the magnetic ring. The Hall chip senses the magnetic field strength in the magnetic ring. Indirect measurement of the magnitude of the current in the wire. The measurement of the Hall sensor is a non-contact measurement, which can measure a large current value. The sampling circuit is simple, no high-voltage isolation is required, and the cost is low. The main sensitive device of the high-precision sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 刘海宁程捷李冠南葛学伟孙晓庆王玉军
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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