An electrochemical energy storage device, which relates to the technical field of electrochemical energy storage devices. The device comprises: an upper connecting bar (4), a rubber piece (3) that has an insulating and sealing effect, a housing (7) and a rolled core (5); the housing (7) is cylindrical and is provided with an opening at at least one end, and the rubber piece (3) and the housing (7) are sealedly connected by means of a waisted section (9) provided on the housing (7); the rolled core (5) is provided in an inner cavity of the housing (7); one end of the upper connecting bar (4) penetrates the rubber piece (3) so as to be conductively connected to a negative electrode welding piece (1), while the other end of the upper connecting bar (4) is conductively connected to the rolled core (5); the rolled core (5) is conductively connected to the housing (7) by means of a lower connecting piece (6); and a positive electrode welding piece (8) is conductively connected to the housing (7). The rubber piece (3) features a good insulation effect, a simple structure and low cost. The upper connecting bar (4) and the lower connecting piece (6) are used for welding, and thus internal resistance is low and large current charging and discharging may be achieved.

An energy storage device includes an electrode terminal including a plate-like terminal body and a shaft portion connected to the terminal body, and an upper insulating member disposed between the terminal body and the case, the upper insulating member having a through-hole through which the shaft portion penetrates. The upper insulating member has a sidewall portion disposed along an end surface of the terminal body. The sidewall portion is provided with a thin portion at a position on a side of a center point of the shaft portion in a direction orthogonal to an extending direction of the sidewall portion in a plan view.

The present disclosure relates to an energy storage device comprising: a housing for accommodating an electrolyte; an electrode element accommodated inside the housing; a case coupled to one side of the housing; and an electrode terminal inserted into the case so as to be electrically connected to the electrode element, wherein the case comprises: a base part having a through-hole into which the electrode terminal is inserted; and a sealing part coupled to the base part so as to seal the space between the base part and the electrode terminal, and the sealing part includes a terminal sealing member located at the through-hole so as to come into close contact with the electrode terminal, thereby sealing the space between the base part and the electrode terminal.

The present disclosure relates to an energy storage device comprising: a housing for accommodating an electrolyte; an electrode element accommodated inside the housing; a case coupled to one side of the housing; and an electrode terminal inserted into the case so as to be electrically connected to the electrode element, wherein the case comprises: a base part having a through-hole into which the electrode terminal is inserted; and a sealing part coupled to the base part so as to seal the space between the base part and the electrode terminal, and the sealing part includes a terminal sealing member located at the through-hole so as to come into close contact with the electrode terminal, thereby sealing the space between the base part and the electrode terminal.

An electrochemical energy storage device comprises: a cover plate (4), comprising a lead-out bar (41) and a fixing plate (42), wherein the lead-out bar (41) is a conductor, the fixing plate (42) is an insulator, and the lead-out bar (41) vertically passes through the fixing plate (42) and is fixed thereon; a housing (9), which is cylindrical and is provided with an opening at at least one end thereof, wherein the insulating fixing plate (42) and the opening of the housing (9) are connected in a sealed manner by means of a sealing ring (2); and a rolled core (7), provided in an inner cavity of the housing (9), wherein the rolled core (7) is conductively connected to the lead-out bar (41) by means of an upper connecting piece (6), and is conductively connected to another lead-out end of the housing (9) by means of a lower connecting piece (8); and the device further comprises: a welding ring (1), conductively connected to the housing (9) by means of welding, and a welding bar (3), conductively connected to the lead-out bar (41) of the cover plate (4) by means of welding, wherein the welding ring (1) and the welding bar (3) are provided on the same side of the housing (9). The upper connecting piece (6) and the lower connecting piece (8) respectively lead out the positive electrode and the negative electrode of the electrochemical energy storage device, and lead the positive electrode and the negative electrode to the outside. The device is led out at two ends, has a low internal resistance, and can be tin-soldered, thereby facilitating the assembly of modules.

A supercapacitor is provided. The supercapacitor includes an elastic fiber, an internal electrode, a first electrolyte layer, and an external electrode. The internal electrode, the first electrolyte layer, and the external electrode are sequentially wrapped on an outer surface of the elastic fiber. The internal electrode includes a first carbon nanotube film and a NiO@MnO.sub.x composite structure, and the external electrode includes a second carbon nanotube film and a Fe.sub.2O.sub.3 layer.

A supercapacitor is provided. The supercapacitor includes an elastic fiber, an internal electrode, a first electrolyte layer, and an external electrode. The internal electrode, the first electrolyte layer, and the external electrode are sequentially wrapped on an outer surface of the elastic fiber. The internal electrode includes a first carbon nanotube film and a NiO@MnO.sub.x composite structure, and the external electrode includes a second carbon nanotube film and a Fe.sub.2O.sub.3 layer.

A power storage device includes: an electrode group including first and second electrodes; a case accommodating the electrode group therein, the case having an opening; and a sealing body closing the opening of the case. The sealing body includes: an annular sealing plate having a first surface and a second surface opposite to the first surface, the sealing plate having a first through-hole provided therein; a terminal plate having a third surface and a fourth surface opposite to the third surface, the third surface facing the first surface of the sealing plate; and an annular gasket disposed between the sealing plate and the terminal plate, the gasket having a second through-hole overlapping the first through-hole. The sealing plate includes a first recessed portion and an outer peripheral portion connected to a peripheral edge of the first recessed portion, the first recessed portion having a recess in the first surface of the sealing plate and having the first through-hole therein. The terminal plate includes a projecting portion projecting from the third surface toward the sealing plate and a flange portion extended from the projecting portion in a second direction intersecting with a first direction. The projecting portion has an end surface closing the first and second through-holes. The projecting portion of the terminal plate is accommodated in the first recessed portion. A peripheral edge of the outer peripheral portion of the sealing plate is joined with an opening end portion of the case. The first electrode and the second electrode are electrically connected to the terminal plate and the case, respectively.

An electrical storage module includes electrical storage devices and a holder including housing parts housing the electrical storage devices therein. Each electrical storage device has an outer circumferential surface, a first end surface provided at a first end of the outer circumferential surface, and a second end surface which is provided at a second end of the outer circumferential surface and is opposite to the first end in a first direction. An inner circumferential surface of the housing part faces the outer circumferential surface of the electrical storage device. The inner circumferential surface includes a sealing member pressing the outer circumferential surface. A resin member is housed in a space demarcated by the inner circumferential surface of the housing part, the outer circumferential surface of the electrical storage device, and the sealing member.

A terminal-coating resin film according to one aspect of the present disclosure is so disposed in a power storage device including a power storage device body and a terminal electrically connected to the power storage device body as to cover an outer peripheral surface of part of the terminal. The terminal-coating resin film has a single-layer structure or a multilayer structure and includes a resin layer having at least one secondary dispersion peak γ within a range of −130° C. to −50° C. in a profile of a loss tangent tan δ obtained by dynamic viscoelastic measurement under a condition of 1.0 Hz. The terminal-coating film is comprised of a resin composition including a first resin including polyolefin and a second resin including at least one resin selected from polyester, polyamide, polycarbonate, and polyphenylene ether.