A Data-Based Evaluation Method of Contact Resistance Variation in High-Voltage Circuits
A contact resistance, high-voltage loop technology, applied in ground resistance measurement, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., can solve problems such as contact resistance evaluation, increase vehicle owner costs, and speed up battery pack loss.
Active Publication Date: 2021-08-20
安徽优旦科技有限公司
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Problems solved by technology
The method in this patent monitors the high-voltage circuit resistance of the battery pack in real time, and alarms when a single group reaches the set threshold, but because the contact resistance of the high-voltage circuit of the battery pack is a dynamic process, and in many extreme cases It is normal for the resistance to appear abnormal once at a certain moment, and it does not affect the use of the battery. If the battery pack is repaired every time the alarm is issued, it will increase the cost of the vehicle owner and will accelerate the loss of the battery pack.
As for the battery condition, an overall evaluation is usually required to determine whether there is an abnormality in the resistance, but the existing methods are difficult to evaluate the change of the contact resistance
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[0036] The present invention will be further described below with reference to the examples and description.
[0037] The evaluation method of the data-based high-pressure circuit contact resistance change is described in detail. The evaluation method of the present invention analyzes the changing resistance of the high-voltage circuit in the battery pack according to the battery pack, according to the battery pack charging data. It is determined whether the battery pack is abnormal. In the battery pack charging, the charging data of the detection section is acquired, and the change in the high-voltage circuit contact resistance in the detection section is compared with the charging data model in the background database, according to the high voltage loop contact resistance change and charging data model The contrast deviation determines that if the deviation is within the set first threshold range, the contact resistance changes are normal, otherwise, the abnormal alarm, the meth...
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The invention discloses a data-based evaluation method for the change of contact resistance of a high-voltage circuit, which belongs to the field of automobile batteries. The evaluation method first defines the detection section. During the charging process of the battery pack, a few minutes before the current time is used as the detection section; then the charging data of the detection section is obtained, and the change of the contact resistance of the high-voltage circuit in the detection section is compared with that in the background database. Compare the charging data model of the high-voltage circuit, and judge according to the deviation between the change of the high-voltage circuit contact resistance and the charging data model. If the deviation is within the set first threshold range, it means that the change of the high-voltage circuit contact resistance is normal. Otherwise, carry out Abnormal alarm. The evaluation method of the present invention quickly and accurately evaluates the change of the contact resistance of the high-voltage circuit of the battery pack in the charging state of the vehicle battery, thereby predicting the condition of the battery pack early and reducing traffic safety accidents caused by battery pack failures.
Description
Technical field [0001] The present invention belongs to the field of automotive battery, and specifically, the present invention relates to an assessment method of contact resistance based on data-based high-voltage circuit contact resistance. Background technique [0002] Restrictions on energy and environment, new energy vehicles have developed rapidly, and new energy vehicles mainly use electrical energy as power. In automobiles, the number of monomer batches is usually connected to a power source through the conductive connector. The structure is fixed in the design position, making a power battery module, and all the cells are combined with the function of the power charge and discharge. At present, there are many new energy vehicles with electricity, and there are many safety accidents that have failed by the battery module. Once the battery module has failed, it may cause the car to destroy. [0003] The battery module is damaged many times due to the high temperature, but...
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IPC IPC(8): G01R27/20G01R31/396G01R31/367
CPCG01R27/205G01R31/367G01R31/396
Inventor 李家伟彭勇俊习清平董丽伟
Owner 安徽优旦科技有限公司