Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Shunsuke Yasui

Toshiki Itoi

Hiroshi Takasaki

Daisuke Kishii

Masato Fujikawa

Tomohiko Yokoyama

Keisuke Shimizu

Shinya Geshi

Keisuke Naito

Takuya Nakashima

Toshihiko Kurosaki

Mikinari Shimada

Hajime Nishino

Shoichiro Watanabe

Shinya Motokawa

Yasuhiro Asaida

Naohisa Morimoto

Takuya Egashira

Hiroshi Takata

Jun Asakura

Masato Koutari

Minari Fukuzumi

Sigeto Noya

Tomohiko Yokohama

A battery block is provided with: a plurality of cylindrical batteries of each of which the two ends are formed as positive and negative electrodes; and a lead plate which is connected to the electrodes of the cylindrical batteries. The cylindrical batteries are provided with battery cans having bottom plates provided with bottom surface electrodes and exhaust valves. The exhaust valves which are provided in the bottom plates open as a result of thin-walled lines breaking at a threshold pressure. The exhaust valves are provided inside the loop-shaped thin-walled lines provided in the bottom plates, said thin-walled lines having unconnected portions. The unconnected portions form hinge parts. Furthermore, the bottom surface electrodes provided in the bottom plates connect the lead plate to the hinge parts. The lead plate has cut-out portions provided in positions facing areas including the thin-walled lines.

Battery block

Disclosed herein is a battery pack which includes a plurality of battery modules housed in a housing. The battery modules are connected in series to each other via connecting members that connects external terminals of the battery modules to each other. The battery modules are classified into groups, each being comprised of at least two of the battery modules, two terminal ones of which have a potential difference of at most V or less between themselves. A first connecting member connects the external terminals of the battery modules to each other between two adjacent ones of the groups. A second connecting member connects the external terminals of the battery modules to each other within an identical one of the groups. If water penetrates into the housing, the first connecting member is electrically cut off, preferentially relative to the second connecting member.

Battery pack

Battery pack includes battery module, metallic installation substrate, metallic attachment member disposed between battery module and installation substrate, metallic fastening part, and insulating member for electrically insulating fastening part and attachment member, and attachment member and installation substrate, from each other, respectively. Insulating member includes annular insulating part having an inner-diameter hole allowing passing through of a male screw shaft portion of fastening part, and electrically insulating between attachment member and an entire surface of an outer periphery of the male screw shaft portion of the fastening part, and between attachment member and an entire surface of an outer periphery of the larger-diameter portion of fastening part; and plate-like insulating part having a corresponding inner-diameter hole which corresponds to the inner-diameter hole of annular insulating part and allows passing through of the male screw shaft portion of fastening part, and electrically insulating between attachment member and installation substrate.

Fastening structure

In a battery pack, a plurality of cells are arranged, the cells each have an outlet through which gas generated in the cell is released in one direction, each two of the cells are arranged as one unit, and the each two of the cells are arranged such that directions of gas released through the outlets of the two cells are opposite to each other.

Battery pack and fastening structure

A battery module is provided in which a signal line is prevented from the influence of noise caused by an internal current output line. A battery module includes: a plurality of cells; a current conduction memberelectrically connecting electrode terminals of the plurality of cells; and a signal lineconfigured to measure capacitance of the plurality of cells, wherein the current conduction member includes a parallel section including two members which are opposite in direction of a current flowing therethrough and are arranged substantially parallel to each other, and a connection section electrically connecting the two members at one end of the parallel section, and the signal line is arranged nearly equidistant from the two members, and extends substantially parallel to the two members to approach the connection section.

Battery module which reduces noise on a signal line

A battery pack includes a plurality of battery modules including a plurality of cells aligned and accommodated in a case, wherein a battery assembly in which the plurality of cells are aligned in a row is used as a unit, and the multiple ones of the battery assembly are aligned in each battery module. The battery modules are a first battery module in which the plurality of battery assemblies are aligned in parallel and second battery modules in which the plurality of battery assemblies are aligned in series, and the first battery module and the second battery modules are combined with each other to form the battery pack.

A cooling unitis provided in the vicinity of a cell, and includes a sealed portionformed by sealing a sheet. An easy-to-open portionis provided in part of the sealed portion, and the easy-to-open portionis opened when the cellabnormally generates heat.

Battery module

A battery connection memberconfigured to connect a plurality of batteriesin parallel includes a main conductive path portionand a plurality of connection terminalseach configured to connect the main conductive path portionto one of electrodes of each battery. The connection terminalsinclude fuse portionsconfigured to be blown when a current equal to or higher than a predetermined value flows. When the plurality of batteriesare connected in parallel by the battery connection member, the fuse portionsare arranged in space between the main conductive path portionand the batteries

Battery connection member and battery module using the same

A battery moduleincludes a plurality of cells, wherein a cooling unitin which a coolant is sealed is disposed in the vicinity of the cells, the coolant is liquid adjusted to have a viscosity within the range of 2 Pa&#xb7;s to 350 Pa&#xb7;s, and the cooling unitincludes an unsealable portionwhich is partially unsealed to release the coolant when at least one of the cellsabnormally generates heat.

A battery pack includes a plurality of battery modules including a plurality of cellsaligned and accommodated in a case, wherein a battery assemblyin which the plurality of cellsare aligned in a row is used as a unit, and the multiple ones of the battery assemblyare aligned in each battery module. The battery modules are a first battery modulein which the plurality of battery assembliesare aligned in parallel and second battery modulesA,B in which the plurality of battery assembliesare aligned in series, and the first battery moduleand the second battery modulesA,B are combined with each other to form the battery pack.

The casehousing a plurality of cellsis divided, by a circuit boardprovided at the same sides of the cells, into a housing spacehousing the cellsand an exhaust ductfor releasing a gas from the ventsof the cellsto outside the caseThe ventsof the cellscommunicate with the exhaust ductthrough openingsformed in the flat plate. The exhaust ductis divided into a first spaceand a second spaceby a partitionprovided between the flat plateand an external plateof the case. The first spacecommunicates with the second spacethrough through holesformed in the partition

A battery module including: a plurality of aligned cells, wherein a cooling unit accommodating a cooling agent is provided in a vicinity of the cells, part of the cooling unit is a vulnerable section having a relatively low compressive strength, and the vulnerable section is unsealed when heat is abnormally generated in at least one of the cells.

A battery system includes a battery module that has a plurality of batteries which are provided with release portions each for releasing internal gas when an internal pressure is increased, and an exhaust portion which is provided with an opening portion and guides gas released from the release portions to the opening portion, a non-resettable switch element which is provided at a position where the guided gas passes in a vicinity of the opening portion, and is changed from a first state preset as one of an opened state and a closed state into a second state as the other one of the opened state and the closed state when a preset reference temperature or higher is reached, and a high-temperature abnormality determination unit which determines that the battery module has an abnormality when the switch element is in the second state.

Battery system

A battery moduleincludes a plurality of cells aligned and accommodated in a case, wherein a positive electrode external terminaland a negative electrode external terminalwhich are connected to electrodes of the plurality of cells are disposed in parallel on a first side surfaceof the caseat a predetermined interval, a pair of recessed sectionsare formed on a second side surfaceadjacent to the first side surfaceof the caseat a same interval as the predetermined interval, a first portionof an L-shaped electrode pieceis selectively attachable to the positive electrode external terminalor the negative electrode external terminal, and a second portionof the electrode pieceis selectively attachable to any one of the pair of recessed sections

Growing community of inventors

Osaka, Japan

Shunsuke Yasui