Murata Manufacturing Co., Ltd.

Kabushiki Kaisha Toshiba

Murata Manufacturingco., Ltd.

Masatomo Tanaka

Akira Yamaguchi

Yasuhiro Nakamura

Yoshifumi Shimizu

Yuto Horiuchi

Shigetaka Tomiya

Akira Ichihashi

Hiroyuki Suwabe

Tomoshige Abe

Kazuhiko Morizawa

Naoki Koshitani

To provide a non-aqueous electrolyte solution capable of improving cycle characteristics of a secondary battery, and a non-aqueous electrolyte secondary battery using the non-aqueous electrolyte solution. A non-aqueous electrolyte solution according to an embodiment of the present technology includes an electrolyte salt and a non-aqueous solvent. The electrolyte salt contains an imide salt as a main electrolyte salt and at least one lithium oxalate borate selected from the group consisting of lithium bis(oxalate) borate (LiBOB), lithium fluoro(oxalate) borate (LiFOB), and lithium difluoro(oxalate) borate (LiDFOB). The non-aqueous solvent contains at least one halogenated carbonic acid ester selected from the group consisting of a halogenated chain carbonic acid ester and a halogenated cyclic carbonic acid ester.

Non-aqueous electrolyte solution, non-aqueous electrolyte secondary battery using non-aqueous electrolyte solution, battery pack using non-aqueous electrolyte secondary battery, and electronic apparatus

A charge and discharge control device is provide. The charge and discharge control device includes a determination circuitry configured to determine an ion diffusion rate associated with electric conduction in a secondary battery, and determine a time integrated value of an overcharged amount of an active material based on the ion diffusion rate and a charge condition; an evaluation circuitry configured to evaluate the charge condition of the secondary battery based on a determination result obtained by the determination circuitry; and a charge and discharge controller configured to control state of current application and voltage application to the secondary battery at a time of charging or discharging the secondary battery based on an evaluation result obtained by the evaluation circuitry.

Charge and discharge control device, charge and discharge control method, battery pack, electronic equipment, electric vehicle, power tool and power storage system

In a secondary battery charging method, constant current charging is performed until a first predetermined voltage Vis attained, constant voltage charging is then performed at the first predetermined voltage V, the first constant voltage charging is completed when a charge current becomes (I&#x2212;&#x394;I) from I, and then n is incremented by one; and constant voltage charging is performed at a voltage V=V+&#x394;V, a step of completing the n-th constant voltage charging when the charge current becomes (I&#x2212;&#x394;I) from Iis repeated by incrementing n by one, and the N-th constant voltage charging in which a value of the voltage Vreaches a second predetermined voltage V(&#x3e;V) is completed to terminate the constant voltage charging.

Secondary battery charging method, charging control apparatus, and secondary battery

The temperature sensor circuit includes a diode that is connected to a first potential at a cathode thereof. The temperature sensor circuit includes a voltage dividing circuit that is connected to an anode of the diode at a second end thereof and outputs a divided voltage. The temperature sensor circuit includes a second amplifying circuit that receives the first signal at a first input end thereof, receives the divided voltage at a second input end thereof, is connected to a first end of the voltage dividing circuit at an output end thereof and outputs a second signal so as to make the divided voltage equal to the first signal. The temperature sensor circuit includes a measuring circuit that calculates a voltage difference between the first signal and the second signal and outputs an output signal based on the result of the calculation.

Temperature sensor circuit

Provided is a technology that can improve a cycle property without lowering a volume energy density. The present technology provides a method for evaluating a secondary battery, including conducting at least: a determination step of determining a degree of diffusion defect of an ion that performs electric conduction; an evaluation step of evaluating a state of the secondary battery on the basis the result of the determination in the determination step; and a control step of controlling states of current application and voltage application on the secondary battery during charging or during discharging of the secondary battery on the basis of the result of the evaluation in the evaluation step.

Secondary battery, evaluation method and production method therefor, and charge-discharge control device

A charging control apparatus is provided and includes a control unit configured to transmit instructions to a charging unit to execute charging of a battery. The control unit is configured to cause a scheme change from a first charging scheme to a second charging scheme based on charging scheme information received by the control unit.

Growing community of inventors

Kanagawa, Japan

Masatomo Tanaka