Over-current diagnosis method and device of battery pack, battery management system and vehicle
A technology of a battery management system and a diagnostic method, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as small current faults that cannot be diagnosed, achieve large current overcurrent fault diagnosis, solve undiagnosable problems, and improve accuracy. sexual effect
Active Publication Date: 2022-01-28
BEIQI FOTON MOTOR CO LTD
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Problems solved by technology
For this reason, the first object of the present invention is to propose a method for overcurrent diagnosis of a battery pack. The method performs overcurrent diagnosis by combining the current size of the battery pack and the heat generation of the battery pack, which can not only realize large current overcurrent Fault diagnosis, and solves the problem that small current faults cannot be diagnosed, and improves the accuracy of over-current fault diagnosis
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[0027] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.
[0028] The method, device, battery management system, and vehicle for overcurrent diagnosis of a battery pack proposed by embodiments of the present invention are described below with reference to the accompanying drawings.
[0029] figure 1 It is a flowchart of an overcurrent diagnosis method for a battery pack according to an embodiment of the present invention. like figure 1 As shown, the overcurrent diagnosis method of the battery pack includes the following steps:
[0030] Step S101, acquiring the actual current value and...
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The invention discloses an over-current diagnosis method and device for a battery pack, a battery management system and a vehicle. The method comprises the following steps: acquiring an actual current value and a current threshold value of the battery pack; obtaining the calorific value of the battery pack within the preset time according to the actual current value; and performing over-current diagnosis on the battery pack according to the actual current value, the current threshold value and the calorific value. Therefore, over-current diagnosis is carried out by combining the current magnitude of the battery pack and the calorific value of the battery pack, large-current over-current fault diagnosis can be realized, the problem that small-current faults cannot be diagnosed is solved, and the accuracy of overcurrent fault diagnosis is improved.
Description
technical field [0001] The invention relates to the technical field of overcurrent diagnosis, in particular to a battery pack overcurrent diagnosis method, device, battery management system and vehicle. Background technique [0002] The current commonly used battery overcurrent diagnosis strategy is usually to compare the actual current of the battery pack with the preset current threshold to determine whether an overcurrent fault has occurred, but this method is only suitable for large current overcurrent faults, not for the inside of the battery pack. Diagnosis of low current faults for a long time, resulting in inaccurate diagnosis of overcurrent faults. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the first object of the present invention is to propose a method for overcurrent diagnosis of a battery pack. The method performs overcurrent diagnosis b...
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IPC IPC(8): G01R31/382
CPCG01R31/382
Inventor 周炳伟赵振熙庞伟强
Owner BEIQI FOTON MOTOR CO LTD