A 7-Cell, Stackable, Li-Ion Monitoring and Active/Passive Balancing IC With In-Built Cell Balancing Switches for Electric and Hybrid Vehicles

Vulligaddala, Veeresh Babu; Vernekar, Sandeep; Singamla, Sudhakar; Adusumalli, Ravi Kumar; Ele, Vijay; Brandl, Manfred; M.B, Srinivas

doi:10.1109/tii.2019.2953939

Cited by 30 publications

(13 citation statements)

References 11 publications

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“…I. Compared to [14], the proposed battery charge balancing can be operated with cells connected in parallel and take into account of SOH. Therefore, the accuracy of the estimations does not decrease with aging effects.…”

Section: Simulation Resultsmentioning

confidence: 99%

A Battery Management System with Charge Balancing and Aging Detection Based on ANN

Sun

Tsai

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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A battery management system with aging detection based on artificial neural network (ANN) for the state of charge (SOC) balancing is proposed in this paper. The charger adopts a single-inductor multiple-output architecture to achieve charge balancing among different battery cells. In constant current mode, the pulse charging is utilized to improve the charging speed and slow down the aging rate. Moreover, an ANN is proposed to detect the state of health (SOH) of the battery cells and improve the accuracy of the SOC estimation. TSMC 0.35-μm process and TensorFlow are used for simulations. A 94% power efficiency of the charger is achieved.The active area of this design is 1.5 x 1.5 mm 2 . Experimental results show that 0.32% root-mean square errors for the SOC estimation is obtained.

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Section: Simulation Resultsmentioning

confidence: 99%

A Battery Management System with Charge Balancing and Aging Detection Based on ANN

Sun

Tsai

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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“…Memory effect is removed by proficient charging and discharging and improves battery discharging period. The operating window of the LIB is around 2.5-4.2 V and the BMS should make sure that the battery is always operated within safe limits [35].…”

Section: Charging and Discharging Of Cellsmentioning

confidence: 99%

“…LIB pack SOC imbalance affects power, energy computation and safety system [45]; Prognostics are not as efficient as diagnostics as less work has been done on the evaluation and comparing performances of different kinds of prognosis; A compact battery testing system (BTS) is needed to test the batteries instead of individual modules from different manufacturers which also increase error for different measurements, etc. [17,35,43]. The next section describes some recommendations to overcome the existing issues/challenges.…”

Section: Miscellaneous Issuesmentioning

confidence: 99%

“…In the fixed shunt resistor method, the current is continuously bypassed and the voltage is limited by varying the resistor. In a controlled shunt resistor approach, controlled switches/relays are used instead of continuously discharging higher charged cells [35,48]. Table 7 shows the comparisons of these approaches [7,48,56].…”

Section: Passive Cell Balancing Techniquesmentioning

confidence: 99%

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Characteristics of Battery Management Systems of Electric Vehicles with Consideration of the Active and Passive Cell Balancing Process

Uzair

Abbas

Hosain

2021

WEVJ

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Energy shortage and environmental pollution issues can be reduced considerably with the development and usage of electric vehicles (EVs). However, electric vehicle performance and battery lifespan depend on a suitable battery arrangement to meet the various battery performance demands. The safety, reliability, and efficiency of EVs largely depends on the constant monitoring of the batteries and management of battery packs. This work comprehensively reviews different aspects of battery management systems (BMS), i.e., architecture, functions, requirements, topologies, fundamentals of battery modeling, different battery models, issues/challenges, recommendations, and active and passive cell balancing approaches, etc., as compared to the existing works which normally discuss one or two aspects only. The work describes BMS functions, battery models and their comparisons in detail for an efficient operation of the battery pack. Similarly, the work presents a comprehensive overview of issues and challenges faced by BMS and also provides recommendations to address these challenges. Cell balancing is very important for the battery performance and in this work various cell balancing methodologies and their comparisons are also presented in detail. Modeling of a cell balancer is presented and a comparative study is also carried out for active and passive cell balance technique in MATLAB/Simulink with an eight cell battery packcell balancing approach. The result shows that the active cell balancing technique is more advantageous than passive balancing for electrical vehicles using lithium-ion batteries.

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“…The battery monitoring integrated circuit (BMIC) is the most significant device used in the BMS slave unit. It connects directly to the battery pack and is designed to monitor multiple cell voltages and temperatures [ 1 , 2 ]. Figure 2 presents the structure of the proposed BMIC.…”

Section: Introductionmentioning

confidence: 99%

A 2.5 V, 2.56 ppm/°C Curvature-Compensated Bandgap Reference for High-Precision Monitoring Applications

Zhu

Liu

et al. 2022

Micromachines

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This work presents a high-precision high-order curvature-compensated bandgap voltage reference (BGR) for battery monitoring applications. The collector currents of bipolar junction transistor (BJT) pairs with different ratios and temperature characteristics can cause greater nonlinearities in ΔVEB. The proposed circuit additionally introduces high-order curvature compensation in the generation of ΔVEB, such that it presents high-order temperature effects complementary to VEB. Fabricated using a 0.18 µm BCD process, the proposed BGR generates a 2.5 V reference voltage with a minimum temperature coefficient of 2.65 ppm/°C in the range of −40 to 125 °C. The minimum line sensitivity is 0.023%/V when supply voltage varies from 4.5 to 5.5 V. The BGR circuit area is 382 × 270 μm2, and the BMIC area is 2.8 × 2.8 mm2.

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A 7-Cell, Stackable, Li-Ion Monitoring and Active/Passive Balancing IC With In-Built Cell Balancing Switches for Electric and Hybrid Vehicles

Cited by 30 publications

References 11 publications

A Battery Management System with Charge Balancing and Aging Detection Based on ANN

A Battery Management System with Charge Balancing and Aging Detection Based on ANN

Characteristics of Battery Management Systems of Electric Vehicles with Consideration of the Active and Passive Cell Balancing Process

A 2.5 V, 2.56 ppm/°C Curvature-Compensated Bandgap Reference for High-Precision Monitoring Applications

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