A reference electrode for a lithium-ion battery cell in the form of a porous ultrathin film that is fabricated from aluminum or an aluminum alloy is described. The aluminum layer is conductive and functions as a current collector for the reference electrode. The alloying elements may include but not limited to one or more of copper, zinc, silver, gold, titanium, chrome, rare earth metals, etc., to achieve target values for electrical, mechanical and chemical properties. Also disclosed is an electrochemical battery cell having an anode, a cathode, and a reference electrode, wherein the reference electrode is interposed between the anode and the cathode, wherein the reference electrode is an electrode layer that is arranged on a current collector, and wherein the current collector is fabricated from an aluminum alloy.

A cell (1) includes a flat electrode assembly formed by superposing and winding respective starting ends of a first electrode sheet (10), a first separator (30), a second electrode sheet (20), and a second separator (40). A first electrode tab (50) and a second electrode tab (60) are both located in grooves of the membranes. Respective starting ends of a second outer membrane (202) and a second inner membrane (203) are both aligned with a starting end of the second current collector (201), and a starting end of a first outer membrane (102) is aligned with a starting end of the first current collector (101). A first head section (106) is provided on a surface of the first current collector (101) facing a center of the cell, and a starting end of the first head section (106) is aligned with the first current collector (101).

Provided are a positive current collector, a preparation method thereof, a positive electrode sheet, a cell and a battery. The positive current collector. The positive current collector includes a substrate film and a functional layer arranged on a surface of the substrate film. The substrate film has a first surface and a second surface opposite to the first surface. The first surface has a first functional layer provided thereon, and the second surface has a second functional layer provided thereon. The first functional layer includes a bonding layer, a current conducting layer, and a protective layer that are stacked sequentially. The bonding layer is arranged on the first surface. The first functional layer is divided to have a first functional segment and a second functional segment in a direction parallel to the first surface. The first functional segment has a thickness greater than a thickness of the second functional segment.

The electrical collector body of the secondary battery includes a resin layer, and metal foils that cover both surfaces of the resin layer. On the metal foils, multiple holes are formed.

This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate includes a current collector, an electrode active material layer provided on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is provided at a zone referred to as a membrane zone on a main body portion of the current collector, the electrical connection member and the current collector are welded and connected at a welding zone referred to as an adapting welding zone at an edge of the current collector, and a transition zone is referred to as an extension zone, where the transition zone is of the current collector between the membrane zone and the adapting welding zone and coated with no electrode active material layer. The current collector is a composite current collector.

A lithium battery cell with an internal fuse component without any welded tabs present for conductance from the internal portion thereof externally to power a subject device is provided. Disclosed herein are lithium ion (liquid electrolyte) battery configurations utilizing thin metallized film current collectors as conducting tabs that provide full electrical conductivity from one pole to another throughout the internal portions of the battery with sufficient space for liquid electrolyte flow as well. Such thin metallized film current collectors thus provide both safety features with low electrical charge runaway potential, low internal resistance, and high thermal conductivity with a simplified manner of providing external electrical conductivity simultaneously.

A lithium battery cell with an internal fuse component without any welded tabs present for conductance from the internal portion thereof externally to power a subject device is provided. Disclosed herein are lithium ion (liquid electrolyte) battery configurations utilizing thin metallized film current collectors as conducting tabs that provide full electrical conductivity from one pole to another throughout the internal portions of the battery with sufficient space for liquid electrolyte flow as well. Such thin metallized film current collectors thus provide both safety features with low electrical charge runaway potential, low internal resistance, and high thermal conductivity with a simplified manner of providing external electrical conductivity simultaneously.

Provided are methods of preparing a separator/anode assembly for use in an electric current producing cell, wherein the assembly comprises an anode current collector layer interposed between a first anode layer and a second anode layer and a porous separator layer on the side of the first anode layer opposite to the anode current collector layer, wherein the first anode layer is coated directly on the separator layer.

Provided are methods of preparing a separator/anode assembly for use in an electric current producing cell, wherein the assembly comprises an anode current collector layer interposed between a first anode layer and a second anode layer and a porous separator layer on the side of the first anode layer opposite to the anode current collector layer, wherein the first anode layer is coated directly on the separator layer.

An electrode structure for use in an energy storage device comprising a population of electrodes, a population of counter-electrodes and a microporous separator separating members of the electrode population from members of the counter-electrode population. Each member of the electrode population comprises an electrode active material layer and an electrode current conductor layer, and each member of the electrode population has a bottom, a top, a length L.sub.E, a width W.sub.E and a height H.sub.E, wherein the ratio of L.sub.E to each of W.sub.E and H.sub.E is at least 5:1, the ratio of H.sub.E to W.sub.E is between 0.4:1 and 1000:1, and the electrode current collector layer of each member of the electrode population has a length L.sub.C that is measured in the same direction as and is at least 50% of length L.sub.E.