Sanyo Electric Co., Ltd.

Prime Planet Energy & Solutions, Inc.

Takuya Egashira

Naotake Yoshida

Yusuke Fujii

Hiroshi Takata

Nao Takeda

Masato Koutari

Takuya Unehara

Shunsuke Yasui

Kazuhiro Harazuka

Shingo Ochi

Noriharu Kobayashi

Yasuaki Uemura

Daisuke Yamane

Yoshimitsu Tashiro

Tomoaki Ito

Battery module includes: battery stack including a plurality of batteries; constraining members made of metal and each having flat surface portion extending in stacking direction of batteries along battery stack, constraining members sandwiching the plurality of batteries in stacking direction; and side separators that insulate constraining members and battery stack from each other. Side separator includes: first portion interposed between battery stack and flat surface portion; and biasing portions that protrude toward battery stack from one end portion region of first portion in a first direction that is an in-plane direction of flat surface portion and intersect with stacking direction, and bias the plurality of batteries toward the other end portion region of first portion in the first direction.

Battery module comprising side separator with a biasing portion

Power source device includes: battery stack in which a plurality of battery cells are stacked; a pair of end plates that each have a plate shape having a main surface and a side surface intersecting the main surface, are formed with plate screw hole on the side surface, and are arranged on both side end surfaces of battery stack; a plurality of fastening members that are extended in stack direction of the battery stack, have fastening screw holes opened at ends, and couple end plates to each other; and bolt that is inserted into fastening screw hole of each fastening member and plate screw hole of end plate to fix the fastening member to end plate. The fastening member includes plate-shaped fastening body, intermediate part obtained by bending both ends of fastening body, and coupling piece obtained by bending an end of intermediate part far from fastening body to provide a height difference from fastening body and form fastening screw hole.

Power source device, and vehicle and power storage device each equipped with same

Battery module includes battery stack having a plurality of batteries stacked, each battery having a top surface provided with an output terminal, restraining member that has flat portion extending along side surfaces of the plurality of batteries in stacking direction of batteries and restrains the plurality of batteries, and side separator that has first portion interposed between each battery and flat portion and insulates each battery from flat portion. Each battery is disposed with gap from first portion, the gap being large enough to suppress movement of water due to capillarity.

Battery module

Power supply device includes: battery stack in which a plurality of battery cells each including, on a top surface thereof, gas discharge valve that opens when an internal pressure of outer covering can increases are stacked; first cover provided on a top surface of battery stack and defining first gas duct communicating with gas discharge valve; and second cover provided on a top surface of first cover and defining second gas duct on a top surface of first gas duct. A plurality of communication holes through which first gas duct and second gas duct communicate with each other are formed on the top surface of first cover.

Power supply device, and vehicle and electrical storage device each equipped with same

A battery system incudes battery stack formed by stacking a plurality of battery cells and cooling plate thermally coupled to battery cell of battery stack. Heat insulating material is disposed between battery cells of battery stack, which are adjacent to each other, and heat insulating material insulates heat between battery cells adjacent to each other. In addition, cooling plate cools battery cell, is used in combination with an endothermic material having heat capacity to absorb thermal runaway energy of battery cell, and prevents induction of thermal runaway.

Battery system, electric vehicle equipped with battery system, and electricity storage device

The battery module includes: battery stack including a plurality of batteries that are stacked, each of the plurality of batteries having valve portion; duct plate configured to cover a surface of battery stack on which the plurality of valve portions are disposed, duct plate having gas discharge duct that is connected to valve portions of the respective batteries, and temporarily stores a blown-off gas; cover plate placed on duct plate; and flow path portion defined by duct plate and cover plate, flow path portion extending from gas discharge duct in a first direction that intersects with stacking direction and allowing leaking of the gas in gas discharge duct to an outside of battery module. Cover plate has opening through which a midst portion of flow path portion is communicable with the outside of the battery module.

The battery module includes: battery stack including a plurality of batteries that are stacked, each of the plurality of batteries having valve portion; duct plate configured to cover a surface of battery stack on which the plurality of valve portions are disposed, duct plate having gas discharge duct that is connected to valve portions of respective batteries, and temporarily stores a blown-off gas; cover plate placed on duct plate; and flow path portion defined by duct plate and cover plate, flow path portion extending from gas discharge duct and allowing leaking of a gas in gas discharge duct to an outside of battery module. Cover plate is disposed in a state where a predetermined gap is formed between cover plate and first wall portion of gas discharge duct that faces valve portions, and opening that allows an inside of gas discharge duct and the gap to communicate with each other is formed in first wall portion of gas discharge duct.

Battery module includes: battery stack including a plurality of batteries that are stacked, each of the plurality of batteries having valve portion; duct plate configured to cover a first surface of battery stack on which a plurality of valve portions are disposed, duct plate having gas discharge duct that temporarily stores a gas blown off from valve portions of respective batteries; cover plate placed on duct plate; flow path portion defined by duct plate and cover plate, flow path portion being connected to gas discharge duct through opening, flow path portion extending in a first direction that intersects with stacking direction of the batteries, flow path portion allowing leaking of the gas in gas discharge duct to an outside of battery module; and gas restricting wall portion disposed in gas discharge duct between valve portion and opening.

Power supply device includes: a pair of end plates disposed on both ends in a stacking direction of battery stack constituted by stacking a plurality of secondary battery cells; and a plurality of fastening members fastening the pair of end plates together. Each of fastening members includes fastening main face having a flat plate shape and locking block fixed to a corner of fastening main face Each of end plates is formed with step that locks locking block while being fastened by fastening members, and has end plate screw hole opened near step. Each of fastening members has fastening side through hole opened so as to align with end plate screw hole while having each of end plates fastened, and has a fixing region fixing locking block to fastening main face disposed in a direction further away from each of end plates than fastening side through hole.

Power supply device, vehicle having power supply device, and power storage device

Provided is power supply device configured for safe discharge to the outside of the power supply device even when gas at high temperature and under high pressure is discharged from a secondary battery cell, power supply device including: a plurality of secondary battery cells each having gas discharge valve for discharging internal gas; and cover part disposed on one surface of battery stack with the plurality of secondary battery cells stacked while covering gas discharge valve of each of the plurality of secondary battery cells. Cover part is provided inside with a gas guide path partitioned to discharge gas discharged from gas discharge valve to the outside of cover part, and the gas guide path includes one or more horizontal gas flow bending portions that bend at least a flow direction of some of the gas in plan view of cover part.

Electric power source device and vehicle with same

A battery system includes a battery block having a plurality of square battery cells () stacked in one direction, parallel connection bus bars (X), insulating plate (), and lid plate () fixed to insulating plate (). Each square battery cell () has a discharge port provided with discharge valve () and a sealing plate provided with positive and negative electrode terminals via an insulating material. Parallel connection bus bars (X) are connected to the electrode terminals to connect some or all of square battery cells () in parallel. Insulating plate () is disposed on the surfaces of sealing plates of the plurality of square battery cells () and includes passing portions having openings provided at positions corresponding to the discharge ports to pass the exhaust gas ejected from the discharge ports and pressing portions () disposed between parallel-connection bus bars (X) and the sealing plates. Lid plate () faces discharge ports facing the openings of the passing portions.

Battery system, and electric vehicle and electric storage device including battery system

The power supply device including: a plurality of secondary battery cells each including a gas discharge valve for discharging internal gas; a plurality of voltage detection lines for detecting voltage of the corresponding plurality of secondary battery cells; a plurality of current fuses provided in the respective plurality of voltage detection lines to shut off current flow when currents flowing through the respective voltage detection lines exceed a predetermined value; and gas guide path communicating with the gas discharge valve to discharge gas discharged from the gas discharge valve to the outside. At least one of the plurality of current fuses is disposed in gas guide path, and is composed of thermal fuse that shuts off current flow depending on temperature of the gas discharged from the gas discharge valve.

Power supply device and vehicle equipped with same

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.

Growing community of inventors

Hyogo, Japan

Takuya Egashira