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Diagnosis method and system of single cell voltage collection harness of power battery and vehicle

A technology of voltage acquisition line and power battery, which is applied in the direction of measuring current/voltage, measuring electricity, and measuring electrical variables, etc., can solve the problems of voltage acquisition, affecting the voltage detection accuracy of power battery, and being unable to detect in time.

Active Publication Date: 2017-12-15
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In related technologies, when a connection problem occurs between the voltage signal collection harness and the single electrode, it can be detected by a battery management system with a battery monitoring IC with an open circuit connection diagnosis function, but the battery management system needs to start a special open circuit detection process. In order to avoid the impact of the detection process on the normal voltage collection of the power battery, it is necessary to perform detection at the initial stage of each power-on of the battery management system
However, if there is a connection problem between the voltage signal collection harness and the single electrode during the running of the vehicle, it cannot be detected in time, which will affect the voltage detection accuracy of the power battery

Method used

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  • Diagnosis method and system of single cell voltage collection harness of power battery and vehicle
  • Diagnosis method and system of single cell voltage collection harness of power battery and vehicle
  • Diagnosis method and system of single cell voltage collection harness of power battery and vehicle

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0031] The diagnosis method, system and vehicle of the individual voltage collection wiring harness of the power battery according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] Before describing the diagnosis method of the monomer voltage acquisition wiring harness of the power battery according to the embodiment of the present invention, the power battery is first described. The power battery usually consists of a plurality of battery modules (also called battery...

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Abstract

The present invention discloses a diagnosis method and system of single cell voltage collection harness of a power battery and a vehicle. The power battery comprises multiple single cells. The method comprises a step of obtaining average voltage, maximum voltage and minimum voltage of collected multiple single cells, a step of judging whether a voltage difference between the maximum voltage and the minimum voltage is larger than a preset open circuit connection voltage difference threshold or not, a step of judging whether a first single cell battery corresponding to the maximum voltage is adjacent to a second single cell battery corresponding to the minimum voltage if so, a step of judging whether the maximum voltage, the minimum voltage and the average voltage satisfy a predetermined relationship if so, and a step of judging whether a voltage collection harness connection point between the first single battery cell and the second single battery cell is abnormal if the predetermined relationship is satisfied. According to the diagnosis method, system and the vehicle, the open circuit connection state between single cell voltage collection harness of the power battery and a single electrode can be timely and accurately diagnosed, and thus whether the collected voltage of the power battery is accurate and reliable can be determined.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a diagnostic method and system for a single voltage acquisition wiring harness of a power battery and a vehicle. Background technique [0002] The power battery pack is composed of dozens or even hundreds of battery cells connected in series and parallel. In order to monitor the voltage change of the battery cells, the positive and negative electrodes of each cell are connected to the acquisition unit in the battery management system through the voltage signal acquisition harness. The battery monitoring IC (Integrated Circuit: Integrated Circuit) in the acquisition unit is responsible for real-time monitoring of cell voltage changes. The voltage signal acquisition wiring harness and the single electrode are generally connected by bolts. Dozens or even hundreds of bolt connection points may become loose or even open-circuited during long-term bumpy driving of the car. [0003...

Claims

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Application Information

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IPC IPC(8): G01R31/04G01R19/10G01R31/36
CPCG01R19/10G01R31/396G01R31/66
Inventor 左从兵马洋洋何杨饶航
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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