CMOS High-Efficiency Wireless Battery Charging System With Global Power Control Through Backward Data Telemetry for Implantable Medical Devices

Wu, Chung‐Yu; Wang, Sung-Hao; Tang, Li-Yang

doi:10.1109/tcsi.2020.3025231

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…Therefore, developing wireless chargeable battery in small size and with high biocompatibility is expected to improve the effectiveness of clinical application of wired implantable devices. [ 147 ] Moreover, the wired implant devices are vulnerable to fiber wrapping because of their mismatched mechanical and biological properties, which will decrease their sensitivity and shorten their working life. Therefore, developing nanosized or flexible electrodes with good biocompatibility, high charge injection ability, and good mechanical property matching with the human tissues are crucial to enhance the performance of wired implant devices.…”

Section: Advanced Designs Of Implants With Charge‐transfer Monitoring or Regulating Abilitiesmentioning

confidence: 99%

Biomedical Implants with Charge‐Transfer Monitoring and Regulating Abilities

et al. 2021

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Transmembrane charge (ion/electron) transfer is essential for maintaining cellular homeostasis and is involved in many biological processes, from protein synthesis to embryonic development in organisms. Designing implant devices that can detect or regulate cellular transmembrane charge transfer is expected to sense and modulate the behaviors of host cells and tissues. Thus, charge transfer can be regarded as a bridge connecting living systems and human‐made implantable devices. This review describes the mode and mechanism of charge transfer between organisms and nonliving materials, and summarizes the strategies to endow implants with charge‐transfer regulating or monitoring abilities. Furthermore, three major charge‐transfer controlling systems, including wired, self‐activated, and stimuli‐responsive biomedical implants, as well as the design principles and pivotal materials are systematically elaborated. The clinical challenges and the prospects for future development of these implant devices are also discussed.

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Section: Advanced Designs Of Implants With Charge‐transfer Monitoring or Regulating Abilitiesmentioning

confidence: 99%

Biomedical Implants with Charge‐Transfer Monitoring and Regulating Abilities

et al. 2021

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“…Nevertheless, the WPT is not limited, in general, to the design of systems for electrical vehicle recharge, but it is a well-established technology also for other devices e.g. pacemakers, implantable devices or other small devices (Ali et al , 2020; Covic and Boys, 2013a; Gaire et al , 2021; Lee et al , 2014; Orasanu et al , 2018; Patel, 2018; Shen and Clerckx, 2021; Wu et al , 2020; Xiao et al , 2018). The simplest WPT systems (WPTSs) are based on a pair of coils, a transmitting and a receiving one, separated by an air gap (Bertoluzzo et al , 2017; Bi et al , 2016; Cirimele et al , 2018; Covic and Boys, 2013b; Feng et al , 2020; Kindl et al , 2020; Choi et al , 2015; “SAE J 2954 Wireless Power Transfer for Light-Duty Plug-in/Electric Vehicles and Alignment Methodology”, 2021; Li and Mi, 2015).…”

Section: Introductionmentioning

confidence: 99%

Finite element models of dynamic-WPTS: a field-circuit approach

Bertoluzzo

Barba

Forzan

et al. 2022

COMPEL

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Purpose The paper aims to propose a a field-circuit method for investigating the magnetic behavior of a wireless power transfer system (WPTS) for the charge of batteries of electric vehicles. In particular, a 3D model for finite element analysis (FEA) for the field simulation of a WPTS is developed. Specifically, the effects of aluminum shield and steel layer, representing the car frame, on the self and mutual inductances are investigated. An equivalent electric circuit is then built, and the relevant lumped parameters are identified by means of the FEAs. Design/methodology/approach The finite element model is used to evaluate self and mutual inductances in several transmitting-receiving coil configurations and relative positions. In particular, the FEA simulates the aluminum and steel layers as shell elements in a 3D domain. The self and mutual inductance values in the aligned coil case are also used as input parameters in a circuit model to evaluate the onload current. Findings The use of shell elements in FEA substantially reduces the number of mesh elements needed to simulate the eddy currents in the steel and aluminum layer, so putting the ground for low-cost field analysis. Moreover, the FEA gives an accurate computation of the self and mutual inductance to be used in a circuit model, which, in turn, provides a fast update of the onload induced current. Originality/value To save computational time, the use of 2D shell elements to model thin conductive regions introduces a simplified FEA that could be used in the WPTS simulation. Moreover, the dynamic behavior of WPTS, i.e. the operation when the receiving coil is moving with respect to the transmitting one, is considered. Because of the lumped parameters’ dependence upon the relative positions of the two coils, the proposed method allows identifying the circuit parameters for several configurations so substantially reducing the computational burden.

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“…[ 58–60 ] Telemetry with an implantable device is particularly challenging and distinguished from conventional wireless communication because both size and the power consumption of the implantable device are severely restricted. [ 61–63 ] However, the requirement for an accurate data rate is relatively low because biological data of interest are often simple and change slowly. Various methods related to RF‐based telemetry have been investigated and proposed to address these conditions.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

Yoo

Lee

Joo

et al. 2021

Adv Healthcare Materials

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Implantable bioelectronic devices are becoming useful and prospective solutions for various diseases owing to their ability to monitor or manipulate body functions. However, conventional implantable devices (e.g., pacemaker and neurostimulator) are still bulky and rigid, which is mostly due to the energy storage component. In addition to mechanical mismatch between the bulky and rigid implantable device and the soft human tissue, another significant drawback is that the entire device should be surgically replaced once the initially stored energy is exhausted. Besides, retrieving physiological information across a closed epidermis is a tricky procedure. However, wireless interfaces for power and data transfer utilizing radio frequency (RF) microwave offer a promising solution for resolving such issues. While the RF interfacing devices for power and data transfer are extensively investigated and developed using conventional electronics, their application to implantable bioelectronics is still a challenge owing to the constraints and requirements of in vivo environments, such as mechanical softness, small module size, tissue attenuation, and biocompatibility. This work elucidates the recent advances in RF‐based power transfer and telemetry for implantable bioelectronics to tackle such challenges.

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CMOS High-Efficiency Wireless Battery Charging System With Global Power Control Through Backward Data Telemetry for Implantable Medical Devices

Cited by 13 publications

References 18 publications

Biomedical Implants with Charge‐Transfer Monitoring and Regulating Abilities

Biomedical Implants with Charge‐Transfer Monitoring and Regulating Abilities

Finite element models of dynamic-WPTS: a field-circuit approach

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

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