As the demand for higher specific energy density in lithium-ion battery packs for electric vehicles rises, addressing thermal stability in abusive conditions becomes increasingly critical in the safety design of battery packs. This is particularly essential to alleviate range anxiety and ensure the overall safety of electric vehicles. A liquid cooling system is a common way in
Our study confirms that 14% of pumping power can be reduced when compared to the conventional constant flow rate cooling system, while still maintaining the temperature of the cells within safe limits. 1. Introduction. The global increase in dependency on fossil fuels has impacted the environment on an extensive basis.
The balanced thermal management strategy enables the battery pack to balance the temperature gradient and aging loss by optimizing the charging time, battery pack temperature difference, energy consumption and other indicators. The weight of each indicator is determined by its information entropy, which can be replaced according to the diverse
Results of this study include a comparison of thermal performance of battery cells by using different cases of battery pack with varying channel size and number of channels in
Feedback PID Controller-Based Closed-Loop Fast Charging of Lithium-Ion Batteries Using Constant-Temperature–Constant-Voltage Method
Prior to the experiment, the battery pack is charged at constant current of 12.8 A (1C) to 33.6 V (cut-off voltage), then charged at constant voltage (current below 0.05C). Finally, after being left for an hour, the fully charged battery pack is discharged at different DRs. The experimental and numerical results of battery pack immersed in flowing FC-3283 at different
During the experiment, the ambient temperature was constant at 25 °C, and the wind speed of the cooling gas was constant at 2.5 m/s. 4 Results and analysis. 4.1 Parameter identification results and analysis. Taking an 18,650-ternary lithium-ion battery as the research object, its main parameters are shown in Table 3. The experimental platform equipment
Accurate characteristic prediction under constant power conditions can accurately evaluate the capacity of lithium-ion battery output. It can also ensure safe use for new-energy vehicles and electrochemical energy
The results of this paper clearly indicate that the maximum and average battery temperature (T-Bt) cells in the duct increase at the beginning of the process and then
This manuscript proposes a multi-stage constant current–constant voltage under constant temperature (MSCC-CV-CT) charging method by considering the cell temperature as the main metric for the dissipation of lithium-ion batteries. By combining the proposed method with a pulse current charging and series resonant converter, the rise in temperature is further slowed
The results of this paper clearly indicate that the maximum and average battery temperature (T-Bt) cells in the duct increase at the beginning of the process and then decrease. After this period, depending on the amount of (Re) of air in the duct, no variations in the T-Bt are detected after a specific duration.
lithium-ion power battery system at low temperature Xudong Sun, Xiaoming Xu*, Jiaqi Fu, Wei Tang, Qiuqi Yuan School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China
2 天之前· In this paper, the temperature monitoring system based on UWFBG array is used to realize the temperature points monitoring of lithium-ion battery pack at the cell level. The UWFBG is fixed on the surface of the battery by using a high-temperature tape to paste at about 10 mm positions at both ends, and is kept in a loose condition, which can eliminate the strain cross
The stable operation of lithium-ion battery pack with suitable temperature peak and uniformity during high discharge rate and long operating cycles at high ambient temperature is a challenging and burning issue, and the new integrated cooling system with PCM and liquid cooling needs to be developed urgently.
2 天之前· In this paper, the temperature monitoring system based on UWFBG array is used to realize the temperature points monitoring of lithium-ion battery pack at the cell level. The
Lithium-ion cell generates heat due to electro-chemical reactions. Intensity of heat release depends on operating conditions (i.e. cell discharge rate, ambient temperature) of
Effective thermal management is critical to retain battery cycle life and mitigate safety issues such as thermal runaway. This review covers four major thermal management techniques: air cooling, liquid cooling, phase
Our study confirms that 14% of pumping power can be reduced when compared to the conventional constant flow rate cooling system, while still maintaining the temperature of
Effective thermal management is critical to retain battery cycle life and mitigate safety issues such as thermal runaway. This review covers four major thermal management techniques: air cooling, liquid cooling, phase-change materials (PCM), and hybrid methods.
Results of this study include a comparison of thermal performance of battery cells by using different cases of battery pack with varying channel size and number of channels in order to get the optimized design of battery pack with liquid
Lithium-ion cell generates heat due to electro-chemical reactions. Intensity of heat release depends on operating conditions (i.e. cell discharge rate, ambient temperature) of the battery pack and results in significant temperature rise. Transient thermal behavior of the cell is analyzed by modeling battery active material and
The normal temperature battery pack is called Pkn, and the high temperature battery pack is called Pkh. The whole process will go through two types of profiles: (1) constant current charge and discharge (See Table 2 for details); (2) worldwide harmonized light vehicles test cycle (WLTC) working conditions [41].
3 天之前· This study introduces a novel comparative analysis of thermal management systems for lithium-ion battery packs using four LiFePO4 batteries. The research evaluates advanced
The balanced thermal management strategy enables the battery pack to balance the temperature gradient and aging loss by optimizing the charging time, battery pack
Thermal Simulation and Experimental Validation of FSEC Lithium-Ion Battery Packs. Conference paper; First Online: 21 February 2024; pp 1271–1290; Cite this conference paper; Download book PDF. Download book EPUB. Proceedings of China SAE Congress 2023: Selected Papers (SAE-China 2023) Thermal Simulation and Experimental Validation of FSEC
Accurate characteristic prediction under constant power conditions can accurately evaluate the capacity of lithium-ion battery output. It can also ensure safe use for new-energy vehicles and electrochemical energy storage.
Effective battery thermal management ensures maximum performance to your lithium battery pack and while maintaining life cycles. a vehicle or machine plugged in for charging can maintain the temperature of the lithium battery at, for example, 15°C, and be ready for use at maximum performance. What''s more, besides having a low impact on the overall
3 天之前· This study introduces a novel comparative analysis of thermal management systems for lithium-ion battery packs using four LiFePO4 batteries. The research evaluates advanced configurations, including a passive system with a phase change material enhanced with extended graphite, and a semipassive system with forced water cooling. A key innovation lies in
The SOC of each battery is balanced by the system estimate of SOC of each cell/battery from the open circuit voltage (OCV). Constant current I (A) is used to charge the battery using 15A and it is
Due to the tight arrangement of the battery pack, there is a risk of thermal runaway under poor heat dissipation conditions. It is thus necessary to predict the power characteristics of the battery in advance and control the temperature of the battery pack.
To tackle these issues, lithium-ion batteries can be fitted with a battery management system (BMS) that oversees the regular functioning of the battery and optimizes its operation. Ensuring the safe functioning and extending the lifespan of a battery necessitates the presence of an efficient thermal management system.
(1) Stabilize the battery pack temperature to 45 °C; (2) The cold plate initiates operation, and the experiment concludes upon reaching a temperature of 25 °C for the high-temperature battery pack. Comparative analysis is conducted between the measured top and bottom battery temperatures and the numerical simulation outcomes (Fig. 8).
The experimental conditions are detailed as follows: the ambient temperature of 45 °C; the coolant flow rate of 18 L/min; and the coolant inlet temperature of 20 °C. The experimental steps are described as follows: Fig. 6. Physical objects of the experimental system. Fig. 7. Distribution of temperature measurement points of the battery pack.
Additionally, the system should consider aspects such as thermal insulation to mitigate cold temperature effects and the prevention of thermal runaway events, emphasizing the importance of a comprehensive and multifaceted approach in managing the thermal challenges of lithium-ion batteries.
The design of thermal management systems for cylindrical lithium-ion battery packs involves specific criteria to optimize performance and safety. First and foremost is the need for effective temperature control to maintain the battery within its optimal operating range, preventing overheating and potential safety hazards.
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