Abstract
The safety of lithium-ion batteries is an essential concern where instant and accurate temperature sensing is critical. It is generally desired to put sensors inside batteries for instant sensing. However, the transmission of internal measurement outside batteries without interfering their normal state is a non-trivial task due to the harsh electrochemical environment, the particular packaging structures and the intrinsic electromagnetic shielding problems of batteries. In this work, a novel in-situ temperature sensing framework is proposed by incorporating temperature sensors with a novel signal transmission solution. The signal transmission solution uses a self-designed integrated-circuit which modulates the internal measurements outside battery via its positive pole without package breaking. Extensive experimental results validate the noninterference properties of the proposed framework. Our proposed in-situ temperature measurement by the self-designed signal modulation solution has a promising potential for in-situ battery health monitoring and thus promoting the development of smart batteries.Graphic abstract
Highlights
Lithium-ion batteries (LIBs) played an important role in energy strategies from fossil fuels to renewable energy [1, 2]
To evaluate the effects of integrated wireless sensor of LIBs, the normal and integrated batteries were analysed under different cycles by the electrochemical impedance spectroscopy (EIS)
A novel in-situ method by integrated wireless sensor that signal transmission was used by a self-designed integrated-circuit, was proposed to measure internal temperature of battery
Summary
Lithium-ion batteries (LIBs) played an important role in energy strategies from fossil fuels to renewable energy [1, 2]. The transmission of internal measurement outside batteries without interfering their normal state is a non-trivial task due to the harsh electrochemical environment, the particular packaging structures and the intrinsic electromagnetic shielding problems of batteries. The signal transmission was used by a self-designed integrated-circuit which modulates the internal measurements outside battery via its positive pole without package breaking. This method has no evident impact on battery, especially electrochemistry performance. The stability of battery and wireless sensor were verified by a series of tests, including electrochemical impedance spectroscopy (EIS), charge–discharge cycle, and in-situ internal temperature field under different states. In-situ wireless sensors have provided a new strategy for battery manufacturers for existing technology as well as facilitating future innovation in design and management, which can offer thermal runaway warning for battery safety
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