Abstract: A power storage module includes at least one power storage device, and a buffer member arranged with the power storage device in a first direction X. The buffer member includes a hard part having a predetermined hardness and a soft part softer than the hard part, the hard part and the soft part receiving a load in first direction X from the power storage device. The hard part changes its shape by receiving a load of a predetermined magnitude or more. The buffer member changes its state, by the hard part changing its shape, from a first state in which the load is received by the hard part to a second state in which the load is received by the soft part.

Abstract: A busbar includes a plurality of sheets stacked together. The busbar includes: a main body that extends along an axis along which batteries are stacked together; and a plurality of connectors that are each thinner than the main body, and are welded to terminals of the batteries, respectively.

Abstract: The battery module includes a plurality of batteries that are stacked and a heat transfer suppression member disposed between adjacent two batteries.

Abstract: A separator includes an intervening portion that is disposed between two adjacent batteries and insulates the two batteries, an input part that receives external force input during assembly of a battery module and is deformable by the external force, and a battery pressing part that is in contact with a first surface of one of batteries, the first surface extending in a stack direction X of the batteries, and use the external force input into the input part to press the first surface.

Abstract: A battery module includes a plurality of batteries stacked together, and a busbar. Each of the plurality of batteries includes a battery-side first structure and a battery-side second structure that regulate the connection of the battery and the busbar. The busbar has a busbar-side first structure and a busbar-side second structure that regulate the connection of the busbar and each of the batteries. If the battery-side first structures of the plurality of batteries are combined with the busbar-side first structure, and the battery-side second structures of the plurality of batteries are combined with the busbar-side second structure, each of the batteries is connected with the busbar. Alternatively, if the battery-side first structure of any one of the batteries is combined with the busbar-side second structure, the one of the batteries or another one of the batteries is not connected with the busbar.

Abstract: Battery module includes a plurality of batteries (secondary batteries), one or more bus bars that electrically connect the plurality of batteries, and cooling plate that is in contact with bus bar and has one or more passages through which a coolant flows. Each of the plurality of batteries has: an electrode body; an outer can that accommodates the electrode body; a lid that seals an opening of the outer can; and positive electrode terminal and negative electrode terminal that are individually inserted through a pair of through holes provided on the lid, are insulated from the lid, and are electrically connected to the electrode body. One of positive electrode terminal and negative electrode terminal is connected to bus bar.

Abstract: A battery module includes a battery and a covering put over a surface of the battery. The surface of the battery is provided with a valve to release gas produced inside the battery. The covering includes a thin-walled part and a thick-walled part disposed in a region contiguous to the thin-walled part. The thin-walled part is formed thinner in thickness than the thick-walled part.

Abstract: A battery module includes a battery stack having a plurality of stacked batteries, a first heat radiator facing first surface of battery stack, a first heat transfer component that is in contact with the first heat radiator and first surface to transfer heat from the battery stack to the first heat radiator, and a second heat radiator facing a second surface of the battery stack. The second surface extends in a direction intersecting with the first surface. The second heat radiator is thermally connected to the second surface directly or through the second heat transfer component. A positional relationship between the first heat transfer component and the battery stack is formed such that the center of the first heat transfer component (84) is more away from the second heat radiator than the center of the battery stack is in a direction along the first surface.

Abstract: An advantage of the present invention is to suppress an increase in resistance during high-rate charge and discharge and a reduction in capacity during a charge and discharge cycle. An electrical storage module of the present embodiment includes: an electrical storage device, and an elastic body that is placed with the electrical storage device and receives a load from the electrical storage device in a placement direction. The electrical storage device includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative-electrode active material layer. The negative-electrode active material layer includes a first layer formed on the negative-electrode current collector, and a second layer that is formed on the first layer and has a higher compression modulus than the first layer. The separator has a lower compression modulus than the first layer, and the elastic body has a lower compression modulus than the separator.

Abstract: A power supply device disposes an end plate at each end of a battery stack in a stacked direction of the battery stack, and couples a binding bar to the end plate, so as to fix battery cells. The binding bar includes a plate-shaped bar that extends in the stacked direction of the battery stack, and an engagement block that is fixed to the plate-shaped bar and protrudes as a face opposing an outer peripheral face of the end plate. The End plate includes a fitting part to which the engagement block is guided, and a stopper. The fitting part is disposed on the outer peripheral face of the end plate. The stopper is disposed closer to the battery stack with respect to the fitting part, and abuts the engagement block.

Abstract: A separator includes an intervening portion that is disposed between two adjacent batteries and insulates the two batteries, an input part that receives external force input during assembly of a battery module and is deformable by the external force, and a battery pressing part that is in contact with a first surface of one of batteries, the first surface extending in a stack direction X of the batteries, and use the external force input into the input part to press the first surface.

Abstract: A battery module includes a battery and a covering put over a surface of the battery. The surface of the battery is provided with a valve to release gas produced inside the battery. The covering includes a thin-walled part and a thick-walled part disposed in a region contiguous to the thin-walled part. The thin-walled part is formed thinner in thickness than the thick-walled part.

Abstract: A bus bar has: a first joint part connected to an output terminal of the first cell; a second joint part connected to an output terminal of the second cell; and a projection that is disposed between the first joint part and the second joint part and protrudes in a stacking direction in which the cells and the bus bar are stacked. The projection has a first inclined part extending from the first joint part and has a second inclined part extending from the second joint part. The first inclined part and the second inclined part are arranged in such a manner that the first inclined part and the second inclined part are aligned with a predetermined interval W and that the predetermined interval gradually becomes wider from a first end side toward a second end side.

Abstract: A battery module includes a battery stack having a plurality of stacked batteries and a pair of end plates disposed on both ends of the battery stack in a stacking direction in which the batteries are stacked. End plates each include two thin-walled parts at both ends in a direction perpendicular to the stacking direction X and a thick-walled part disposed between the two thin-walled parts. The thick-walled part is thicker than the thin-walled parts in the stacking direction. The battery module further includes a pair of restraint members each including stacked parts stacked on surfaces of the thin-walled parts remote from the battery stack and fasteners to fasten the stacked part of the one restraint member to the one thin-walled part and to fasten the stacked part of the other restraint member to the other thin-walled part.

Abstract: In a power supply device, both ends of a bind bar are coupled to a pair of end plates disposed at both ends of the battery stack in a stacking direction formed by stacking battery cells, a cooling plate made of metal different from metal of the bind bar is disposed on a surface of the battery stack in a themally coupled state, and a cooling plate is fixed to the battery stack via bolts disposed in a longitudinal direction of the battery stack. In the power supply device, length (L) of a fixed region formed by fixing the bind bar to the cooling plate with the bolts is set to less than or equal to 70% of total length of the bind bar, and a non-fixed region that is not fixed to cooling plate via the bolts is provided at an end of the bind bar.

Abstract: A busbar includes a plurality of sheets stacked together. The busbar includes: a main body that extends along an axis along which batteries are stacked together; and a plurality of connectors that are each thinner than the main body, and are welded to terminals of the batteries, respectively.

Abstract: A power supply device disposes an end plate at each end of a battery stack in a stacked direction of the battery stack, and couples a binding bar to the end plate, so as to fix battery cells. The binding bar includes a plate-shaped bar that extends in the stacked direction, and an engagement block that is provided on a plate-shaped bar and protrudes as a face opposing an outer peripheral face of the end plate. The engagement block is inserted into a fixing hole provided in the plate-shaped bar and fixed to an inner peripheral face of the fixing hole. The end plate includes a fitting part, to which the engagement block is guided, on the outer peripheral face of the end plate, and includes a stopper that is disposed closer to the battery stack with respect to the fitting part and abuts the engagement block.

Abstract: A power supply device having a battery block with a terminal surface on which terminals of a plurality of battery cells are arranged side by side, and a side plate with an elastic part, a holding part and a body part that extends along the side surfaces of the battery block. The elastic part faces the terminal surface and the holding part faces the bottom surface of the battery block. An insulation part is disposed between the elastic part and the battery block and has a positioning region and a pressing region that are disposed on one surface of the insulation part so as to face the elastic part. The positioning region is provided at an end of the insulation part located at the body part side, and extends to a position that is separated farther away from the elastic part than the pressing region.

Abstract: A battery module includes: a battery stack that includes a plurality of batteries stacked; a pair of end plates that are disposed at both ends, in stack direction X in which the batteries are stacked, of the battery stack, the pair of end plates including at least one end plate that includes a first portion made of a first metal that has a Young's modulus higher than a Young's modulus of a second metal, and a second portion made of the second metal that has a density lower than a density of the first metal; a restraint member that is made of the first metal and sandwiches the battery stack and the pair of end plates in stack direction X; and a welded portion that connects the first portion of the at least one end plate with the restraint member.

Abstract: In order to enable the suppression of a decrease in screw fastening force due to a difference in linear expansion, a power supply device includes: a battery stacked body (11) including a plurality of stacked secondary battery cells (1); a fixing part configured to fix the battery stacked body (11); a fastening assistance plate (50) having the same linear expansion coefficient as the fixing part; a fixing plate (30) disposed between the fixing part and the fastening assistance plate (50), and having one surface on which the battery stack body (11) is disposed; and a plurality of screw connected members (40) passing through the fixing part, the fixing plate (30), and the fastening assistance plate (50). Each of the plurality of screw connected members (40) has a seating surface on which a frictional force operates, caused by an axial force, and the seating surface of each of the plurality of screw connected members (40) is in contact with the fixing plate (30) or the fastening assistance plate (50).