Charge control circuit and abnormality detection system of secondary battery

A charge control circuit of a secondary battery, comprising:

• a temperature sensor for sensing a temperature of the secondary battery;
• a first temperature comparison circuit and a second temperature comparison circuit provided with an analog signal from the temperature sensor to generate a pulse signal;
• a heating device of the secondary battery which operates in two temperature ranges set by the first temperature comparison circuit;
• a cooling device of the secondary battery which operates in two temperature ranges set by the second temperature comparison circuit;
• and
• a memory means which is configured to hold an analog signal,
• wherein the memory means comprises a transistor using an oxide semiconductor for a semiconductor layer, a capacitor, a first wiring, a second wiring, and a third wiring,
• wherein the transistor comprises a first gate and a second gate,
• wherein a first terminal of the transistor is electrically connected to the first wiring,
• wherein a second terminal of the transistor is electrically connected to a first terminal of the capacitor,
• wherein the first gate of the transistor is electrically connected to the second wiring, and
• wherein the second gate of the transistor is electrically connected to the third wiring.