In this paper, the thermal consistency and electrochemical performance of batteries were comprehensively considered to improve the test and ensure the …
A Device for Test and Evaluation of Consistency of Power Battery …
In this paper, the thermal consistency and electrochemical performance of batteries were comprehensively considered to improve the test and ensure the …
A Copula-based battery pack consistency modeling method …
With the battery pack consistency model, the state of health (SOH) of the battery pack can be estimated. The battery pack SOH indicators can either be defined as the battery pack capacity or the battery pack internal resistance [11,[18], [19], [20]]. In Ref. [18], the battery pack capacity is defined as the minimum capacity of the battery cells.
TITLE OF ABSTRACT GOES HERE, TITLE OF ABSTRACT GOES …
Battery Internal Short Circuit Detection Mingxuan Zhanga, Minggao Ouyanga, Languang Lua, Xiangming Heb, Xuning Fenga, Lishuo Liua, and Xiaoyi Xieb a State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China b Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China. …
Consistency Evaluation of Electric Vehicle Battery Pack: Multi …
In this work, a battery pack consistency evaluation approach is proposed based on multi-feature information fusion. Ohmic resistance, polarization resistance and open circuit …
Consistency evaluation and cluster analysis for lithium-ion battery ...
The higher mileage reduces the pack consistency, as the battery''s performance evolves into multiple clusters. Nine months later, the pack consistency is …
Evaluation of Cell Inconsistency in Lithium-Ion Battery Pack Using …
Abstract: Cell inconsistency is a common problem in the charging and discharging of lithium-ion battery (LIB) packs that degrades the battery life. In situ, real-time data can be obtained from the battery energy storage system (BESS) of an electric boat through telemetry. This article examined the use of a 57-kWh BESS comprising six battery ...
Evaluation of Lithium-Ion Battery Pack Capacity Consistency …
The capacity inconsistency among commercial lithium-ion battery packs is an important factor affecting their service life. However, there is still a lack of detection methods to accurately test the capacity consistency of lithium-ion battery packs at cell level. To solve this problem, a non-destructive testing method for capacity consistency …
These results are helpful for the battery pack consistency studies. Introduction. Lithium (Li)-ion batteries (LIBs) offer high energy density, long service life and environmental friendliness, which are of great significance for reliable energy supply in the future [[1], [2], [3]]. Currently, LIBs are widely used in new energy vehicles and grid ...
Research on battery pack SOC consistency based on the electric …
The SOC consistency in battery pack was improved and the capacity attenuation tended to be consistent, thus prolonging the service life of the battery pack. (4) The non-uniform initial SOC had an obvious influence on the consistency and the service life of battery pack. The maximum SOC difference in the group with non-uniform initial …
Research on battery pack consistency assessment and fault …
The battery pack fault diagnosis algorithm is constructed by using δ and sample entropy to realize early real-time fault diagnosis of battery packs. Finally, battery pack …
A battery pack consistency evaluation method based on multi-feature weighting is proposed. To comprehensively characterize the behavior of the battery pack, Zou et al. [129] considered five factors including voltage, temperature, internal resistance, capacity and electricity. The weights are decided by the analytical hierarchy process.
Joint Estimation of Inconsistency and State of Health …
Battery pack inconsistency and state of health are two key characteristics that need to be accurately estimated in the battery management system. A novel joint estimation method of these two states …
Internal short circuit detection for battery pack using equivalent ...
Detecting ISCr by battery pack consistency [26], [27]. ... However, hard shorts or the late stage of ISCr, which have mΩ magnitude of short resistances, will lead to instant thermal accidents, and thereby the ISCr detection results will be meaningless due to no time margin for countermeasures. Soft shorts or the early stage of ISCr, such as ...
In Situ Detection of Lithium‐Ion Battery Pack Capacity …
One of the main obstacles for the reliability and safety of a lithium-ion battery pack is the difficulty in guaranteeing its capacity consistency at harsh operating conditions, while the key solution is accurate detection of cell capacity inconsistency within the battery pack without taking it apart for destructive testing.
Battery pack consistency modeling based on generative …
In working condition of battery packs, the battery pack consistency has a great impact on the overall performance of the battery pack. In order to build an accurate battery pack model, we need to build a battery pack consistency model. Firstly, we used a Gaussian mixture model to fit the statistical characteristics of a single parameter. This method can …
Battery pack consistency modeling based on generative …
In working condition of battery packs, the battery pack consistency has a great impact on the overall performance of the battery pack. In order to build an accurate battery pack model, we need to ...
Analysis of the cell consistency in the lithium battery pack
The life of the entire battery pack is our ultimate focus on consistency. The purpose of pursuing consistency is not only to exert the maximum capacity of the battery pack (including maximum power, maximum current, and maximum available capacity) in the current state, but also to maintain it for as long as possible. 2.
A novel battery pack inconsistency model and influence degree …
The coupling mechanism between parameters is extremely complex, and these parameters are still assumed to be independent of each other in most existing battery pack consistency models. Jiang [13] et al. used the Copula function for the first time to model battery pack inconsistency. However, the applied three-dimensional basis …
Study on Battery Pack Consistency Evolutions during …
The initial SOC inconsistency and temperature of the battery are two key factors affecting the battery pack consistency based on the operation data, providing a foundation for battery consistency ...
A method of cell-to-cell variation evaluation for battery packs …
The three battery packs include a heavily aged lithium-ion battery pack (named as Pack A), a new battery pack (Pack B) and a lightly aged battery pack (Pack C). The charge cut-off voltage is 4.15 V and the discharge cut-off voltage is 3.1 V as recommended. Each battery pack consists of 96 cells (in series) and 18 temperature …
Consistency evaluation and cluster analysis for lithium-ion battery ...
Consistency is an essential factor affecting the operation of lithium-ion battery packs. Pack consistency evaluation is of considerable significance to the usage of batteries. Many existing methods are limited for they are based on a single feature or can only be implemented offline. This paper develops a comprehensive method to evaluate …
Evaluation of Lithium-Ion Battery Pack Capacity Consistency …
The capacity inconsistency among commercial lithium-ion battery packs is an important factor affecting their service life. However, there is still a lack of detection methods to accurately test the capacity consistency of lithium-ion battery packs at cell level. To solve this problem, a non-destructive testing method for capacity consistency of lithium-ion …
A Copula-based battery pack consistency modeling method and …
Then the aging characteristics of the battery pack are analyzed and the main results are as follow: (1) Weibull and normal distribution are feasible to fit the capacity and resistance distribution ...
Battery pack consistency modeling based on generative advers
Downloadable (with restrictions)! In working condition of battery packs, the battery pack consistency has a great impact on the overall performance of the battery pack. In order to build an accurate battery pack model, we need to build a battery pack consistency model. Firstly, we used a Gaussian mixture model to fit the statistical characteristics of a single …
Study on Battery Pack Consistency Evolutions during Electric Vehicle ...
The Safety warning of battery packs can effectively prevent thermal runaway accidents in electric vehicles. The inconsistency evaluating of the battery pack accurately is a prerequisite for safety ...
Evaluation method for consistency of lithium-ion battery packs in ...
This study proposes an evaluation method for the consistency of lithium-ion battery packs in EVs based on the Mahalanobis-Taguchi system (MTS). First, a …
Internal short circuit detection for battery pack using equivalent ...
Internal short circuit (ISCr) detection of a battery is critical for preventing thermal runaway and enhancing electrical vehicle safety. In this paper, the electrical characteristics of the ISCr of a large format lithium ion battery are analyzed using the equivalent circuit model (ECM). An ISCr detection method is developed based on battery consistency within the …
