Unlock instant, AI-driven research and patent intelligence for your innovation.
Power battery pack fault diagnosis method and system based on correlation
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A power battery pack and power battery technology, which is applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of increasing difficulty in abnormal value detection, affecting abnormal value detection, and difficult online application
Active Publication Date: 2022-01-04
SHANDONG UNIV
View PDF21 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, ensuring the accuracy of the battery model in different battery states requires high computational complexity, which is difficult to apply online
The interference of measurement noise will affect the detection of outliers, especially in the case of small short-circuit faults, the difficulty of detecting outliers will further increase
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] Embodiment one, such as figure 1 As shown, this embodiment provides a method for diagnosing short-circuit faults in series-connected power battery packs;
[0036] A method for diagnosing short-circuit faults in a battery pack, comprising the following steps:
[0037] S1: collect the data associated with the parameters with higher correlation between the target power battery and the reference power battery in the power battery pack, and then calculate the correlation between the target power battery and the reference power battery based on the data the true value of the parameter with higher correlation;
[0038] In this embodiment, the higher correlation can be specifically set or selected based on experience or according to specific situations. For example, in some embodiments, a parameter with a parameter correlation greater than a set value may be selected as a parameter with a higher correlation.
[0039] S2: Calculate and obtain the current parameter prediction ...
Embodiment 2
[0069] Embodiment two, such as figure 2 As shown, this embodiment also provides a short-circuit fault diagnosis system for a power battery pack;
[0070] A short-circuit fault diagnosis system for a power battery pack, comprising:
[0071] A data acquisition module configured to: acquire data associated with parameters having a high correlation between the target power battery and the reference power battery in the power battery pack;
[0072] A data processing module, which is configured to: calculate the real value of a parameter having a relatively high correlation between the target power battery and the reference power battery based on the data;
[0073] The parameter prediction module is configured to: calculate and obtain the target power battery according to the real value of the historical parameters of the target power battery and the reference power battery and the current parameter real value of the reference power battery through a correlation-based parameter pr...
Embodiment 3
[0076] Embodiment 3. This embodiment also provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are executed by the processor, the computer instructions in Embodiment 1 are completed. steps of the method described above.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a correlation-based power battery pack fault diagnosis method and system. The correlation-based power battery pack fault diagnosis method comprises the following steps: acquiring data associated with parameters meeting correlation requirements between a target power battery and a reference power battery in a power battery pack; calculating the true values of the parameters meeting the correlation requirements based on the data; calculating the current parameter prediction value of the target power battery according to the historical parameter true values of the target power battery and the reference power battery and the current parameter true value of the reference power battery by using a correlation-based parameter prediction algorithm; and according to the real value and the predicted value of the parameter, determining whether a short-circuit fault occurs in the target power battery at present, and performing early warning when the fault occurs. According to the invention, battery abnormity can be accurately measured under different battery states and measurement noise interference, and online battery pack short-circuit fault diagnosis is carried out.
Description
technical field [0001] The invention belongs to the technical field of power battery pack fault diagnosis, and in particular relates to a correlation-based power battery pack fault diagnosis method and system. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] When the power battery pack is in a short-circuit fault state, its consistency will deteriorate, resulting in additional capacity loss and increased heat production. This will not only greatly shorten the cruising range of electric vehicles, but also cause irreversible damage to lithium batteries, affect battery life and even cause thermal runaway and endanger driving safety. This seriously hinders the promotion and development of electric vehicles. Therefore, it is necessary to use fault diagnosis methods to diagnose short-circuit faults of power battery packs in a timely and efficie...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More