Battery Cell Temperature Sensing Towards Smart Sodium-Ion Cells for Energy Storage Applications

Vincent, Timothy A.; Hasa, Ivana; Gulsoy, Begum; Sansom, J.E.H.; Marco, James

doi:10.1109/cpe-powereng54966.2022.9880876

Cited by 1 publication

(8 citation statements)

References 30 publications

(55 reference statements)

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“…The benefits of instrumentation have been in the literature (e.g. thermistor instrumentation [6,7], thermocouple instrumentation [23]).…”

Section: Cell Instrumentationmentioning

confidence: 99%

“…This tubing was demonstrated as forming a chemically resilient barrier, against the harsh electrolytic environment within the LIBs, as well as mechanical support during the instrumentation process, and allowed precise internal temperature measurements. The layer was chemically inert (>100 cycles tested [6]), and also provided physical protection during sensor installation. This method was suited for small laboratory scale production but cannot be scaled to greater production volumes.…”

Section: Protective Coatingsmentioning

confidence: 99%

“…Vincent et al [6,7] Target for this work-protection for miniature sensors, applicable to range of cell formats.…”

Section: Experiments Aimmentioning

confidence: 99%

“…Electrolyte is inherently corrosive, thereby embedding an unprotected sensor will cause (1) damage to the sensor (corrosion and ultimate failure of electronic components) and ( 2) degradation of the cell performance (contaminants from the sensor materials pollute the electrolyte). Prior work in the area of instrumented LIBs [6,7] has demonstrated the importance of embedding sensing, towards understanding cell operation in-situ.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of temperature monitoring, and safety evaluation with our developed instrumentation process, internal sensors provide a reliable and repeatable monitoring placement. In terms of monitoring core cell temperature, the thermistor arrays covering approach offers excellent chemical and physical protection, demonstrated by a prior study conducted over 100 cycles of cylindrical cell ageing [6]. Cylindrical cells, due to their mechanical stability and robustness to internal pressure, are popular with electric vehicle (EV) manufacturers [11].…”

Section: Introductionmentioning

confidence: 99%

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A compatibility study of protective coatings for temperature sensor integration into sodium-ion battery cells

Vincent,

Maddar,

Chao

et al. 2024

J. Phys. Energy

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Instrumented battery cells (i.e., those containing sensors) and smart cells (with integrated control and communication circuitry) are essential for the development of the next-generation battery technologies, such as Sodium-ion Batteries (SIBs). The mapping and monitoring of parameters, for example the quantification of temperature gradients, helps improve cell designs and optimise management systems. Integrated sensors must be protected against the harsh cell electrolytic environment. State-of-the-art coatings include the use of Parylene polymer (our reference case). We applied three new types of coatings (acrylic, polyurethane and epoxy based) to thermistor arrays mounted on flexible printed circuit board (PCBs). We systematically analyse the coatings: (i) PCB submersion within electrolyte vials (8-weeks); (ii) analysis of sample inserted into coin cell; (iii) analysis of sensor and cell performance data for 1Ah pouch SIBs. Sodium-based liquid electrolyte was selected, consisting of a 1M solution of sodium hexafluorophosphate (NaPF6) dissolved in a mixture of ethylene carbonate (EC) and diethylene carbonate (DEC) in a ratio of 3:7 (v/v%). Our novel experiments revealed that the epoxy based coated sensors offered reliable temperature measurements; superior performance observed compared to the Parylene sensors (erroneous results from one sample were reported, under 5 days submersed in electrolyte). Nuclear magnetic resonance (NMR) spectroscopy revealed in the case of most coatings tested, formation of additional species occurred during exposure to the different coatings applied to the PCBs. The epoxy-based coating demonstrated resilience to the electrolytic-environment, as well as minimal effect on cell performance (capacity degradation compared to unmodified-reference, within 2% for the coin cell, and within 3.4% for pouch cell). The unique methodology detailed in this work allows sensor coatings to be trialled in a realistic and repeatable cell environment. This study demonstrated for the first time that this epoxy-based coating enables scalable, affordable, and resilient sensors to be integrated towards next-generation Smart SIBs.

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“…The benefits of instrumentation have been in the literature (e.g. thermistor instrumentation [6,7], thermocouple instrumentation [23]).…”

Section: Cell Instrumentationmentioning

confidence: 99%

Section: Protective Coatingsmentioning

confidence: 99%

“…Vincent et al [6,7] Target for this work-protection for miniature sensors, applicable to range of cell formats.…”

Section: Experiments Aimmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A compatibility study of protective coatings for temperature sensor integration into sodium-ion battery cells

Vincent,

Maddar,

Chao

et al. 2024

J. Phys. Energy

Self Cite

View full text Add to dashboard Cite

show abstract

Battery Cell Temperature Sensing Towards Smart Sodium-Ion Cells for Energy Storage Applications

Abstract: How to cite:Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 1 publication

References 30 publications

A compatibility study of protective coatings for temperature sensor integration into sodium-ion battery cells

A compatibility study of protective coatings for temperature sensor integration into sodium-ion battery cells

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