Abstract: A sensor capable of detecting local expansion or the like is provided, and a storage battery system including a safety system such as the sensor and a secondary battery is provided. The storage battery system includes a first secondary battery and a second secondary battery each including an exterior body holding an electrolyte solution, a positive electrode, and a negative electrode; a sensor member provided to be in contact with part of the exterior body; and a detection circuit controlling the sensor member. The first secondary battery includes a memory unit storing data collected with gas introduction into the second secondary battery, a learning model constructed on the basis of the data, and an estimated value obtained using the learning model; and a unit providing information based on the estimated value.

Abstract: Provided is a power storage system, a secondary battery control system, a secondary battery measurement circuit, or the like that consumes low power. Provided is a power storage system, a secondary battery control system, a secondary battery measurement circuit, or the like that is highly integrated. The power storage system includes a secondary battery and a measurement circuit; the measurement circuit includes a resistor, a capacitor, and an inductor; one terminal of the resistor is electrically connected to one electrode of the capacitor; the other terminal of the resistor is electrically connected to one terminal of the inductor; one terminal of the inductor is electrically connected to a positive electrode of the secondary battery; and the measurement circuit has a function of measuring impedance of the secondary battery by measuring current of the resistor.

Abstract: A novel image correction system is provided. The image correction system includes an imaging device, a first arithmetic device, a display portion including a plurality of pixels, and a second arithmetic device. The imaging device obtains imaging data by capturing a first-gray-level image displayed on the display portion. The first arithmetic device calculates the luminous intensity of each of the pixels and a correction standard by using the imaging data. The first arithmetic device calculates correction data for each of the pixels by using the luminous intensity and the correction standard. The second arithmetic device corrects a video signal by using the correction data. The display portion displays an image using the corrected video signal. The first arithmetic device calculates correction data for pixels that emit red light, pixels that emit green light, and pixels that emit blue light and modifies the correction data by using color temperature data.