Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

So Kuranaka

Katsumi Kozu

Toshihiko Ichinose

Masahiro Takada

Satoshi Shibutani

Kazuhito Hatoh

Eiichi Yasumoto

Tadao Kimura

Masatoshi Nagayama

Takaharu Gamo

Shoichiro Watanabe

Yoshio Morita

Naohisa Morimoto

Jo Suzuki

Sadao Nagai

Mamoru Hamanishi

A non-aqueous electrolyte secondary battery including: a positive electrode including a positive electrode material mixture layer; a negative electrode including a negative electrode material mixture layer; a separator or lithium-ion conductive porous film interposed between the positive electrode and the negative electrode; and a lithium-ion conductive non-aqueous electrolyte. The positive electrode material mixture layer contains a positive electrode active material comprising a lithium transition metal composite oxide, and the lithium transition metal composite oxide contains lithium, a transition metal, and a metal different from the transition metal. The negative electrode material mixture layer contains a negative electrode active material comprising a carbon material. In the area where the positive electrode material mixture layer and the negative electrode material mixture layer are opposed to each other, the ratio R:Wp/Wn is 1.3 to 2.2 where Wp is the weight of the positive electrode active material contained in the positive electrode material mixture layer per unit opposed area and Wn is the weight of the negative electrode active material contained in the negative electrode material mixture layer per unit opposed area. The end of charge voltage is set to 4.25 to 4.5 V in normal operation.

Nonaqueous electrolyte secondary battery and charge/discharge system thereof

A clean power supply unit with a high fuel utilization rate using a fuel cell is provided. The power supply unit of the present invention comprises a fuel cell using methanol as fuel; a secondary battery for supplying power to a load; a fuel cell control part for controlling the amount of fuel and/or air supplied to the above-mentioned fuel cell; and a power converter for converting the power output from the above-mentioned fuel cell to a predetermined voltage or current, supplying power to the load and/or the above-mentioned secondary battery and controlling the supplied power so as to fall within a predetermined range including the value at which the amount of methanol discharged from the above-mentioned fuel cell becomes minimized.

Power supply unit

A battery pack is provided, in which a plurality of rechargeable batteries are held by a center frame, a bottom-side frame, and a terminal-side frame in a parallel spaced relationship, the plurality of rechargeable batteries being connected in series and integrated with a circuit substrate by mounting the circuit substrate on the terminal-side frame, the circuit substrate being provided with a resin mold, whereby the battery pack is free of damage to electrical circuit parts even in the event of entrance of water or dust through vents that are provided for suppressing temperature rise of the rechargeable batteries. The plurality of rechargeable batteries are connected in series by joining connection plates to the positive and negative electrode terminals formed on the sealing plates of plurality of the rechargeable batteries that are held by the terminal-side frame, and connection projections formed to each connection plate are fitted in respective connection holes in the circuit substrate so as to integrate the circuit substrate with the rechargeable batteries, whereby the wiring for connecting each of the rechargeable batteries to the circuit substrate is made simple.

Battery pack

A battery pack is provided which includes: a battery set having a plurality of secondary-battery cells connected in series and in parallel; and a battery-abnormality detection circuit. The battery-abnormality detection circuit controls a battery-set circuit separation switch, so as to detect an abnormality in each secondary-battery cell based on a change in the voltage of each cell when parallel-connection separation switches are turned off, and if detecting an abnormal secondary-battery cell, so as to separate the series module including this cell from a battery-set body.

The power supply apparatus of the present invention comprises a fuel cell, a secondary battery for supplying power to a load, a power measurement section for measuring the output power of the fuel cell, a power converter which inputs output of the fuel cell, controls the output power so that the input voltage or the input current approaches the operation target value, supplies the output power to the load and/or the secondary battery and conducts a power conversion, and a control section which controls quantity of fuel to be supplied to the fuel cell, and also indicates to the power converter of an operation target value that comes within predetermined range which includes the smallest quantity of fuel the fuel cell discharges, wherein the control section sequentially indicates a plurality of the target values for power measurement to the power converter, the power measurement section measures the output power of the fuel cell for each target value for power measurement, and the control section seeks the target value which gives the maximum power within a plurality of output powers, and updates the operation target value based on that value.

Power supply apparatus having control section for controlling quantity of fuel to be supplied to fuel cell

A fuel cell system has a fuel cell of solid polymer type, a rectangular parallelepiped sealing container for accommodating hydrogen occlusion alloy for occluding hydrogen to be supplied to said fuel cell, a connection portion provided in a hydrogen passage between said sealing container and said fuel cell for connecting said sealing container and said fuel cell detachably, a valve mechanism provided in said hydrogen passage for opening and shutting hydrogen gas, and a hydrogen flow rate control mechanism provided in said hydrogen passage for controlling the flow rate of hydrogen gas, and/or hydrogen pressure control mechanism for controlling the pressure of hydrogen gas.

Fuel cell system, fuel feed system for fuel cell and portable electric

Growing community of inventors

Osaka, Japan

So Kuranaka