Examples are disclosed herein that relate to curved batteries. One example provides a battery comprising an anode arranged on an anode substrate, a cathode arranged on a cathode substrate, the anode substrate being curved at a first curvature and the cathode substrate being curved at a second curvature, and a separator between the anode and the cathode. A thickness of the anode substrate and a thickness of the cathode substrate are determined based on the curvature of the respective substrate, such that the one of the anode substrate and the cathode substrate with a larger curvature has a larger thickness.

Examples are disclosed herein that relate to curved batteries. One example provides a battery comprising an anode arranged on an anode substrate, a cathode arranged on a cathode substrate, the anode substrate being curved at a first curvature and the cathode substrate being curved at a second curvature, and a separator between the anode and the cathode. A thickness of the anode substrate and a thickness of the cathode substrate are determined based on the curvature of the respective substrate, such that the one of the anode substrate and the cathode substrate with a larger curvature has a larger thickness.

A substrate for an electrode is provided, the substrate for an electrode including a support and an electrode mixture layer including an active material on the support, and the support includes wrinkles in which peak regions and valley regions are formed in a transverse direction.

Disclosed is a secondary battery. The secondary battery includes an electrode assembly having a plurality of unit electrode bodies, each electrode body including a positive electrode plate having a plurality of positive electrode uneven grooves into which a positive electrode active material is inserted, a negative electrode plate having a plurality of negative electrode uneven grooves located to face the positive electrode uneven grooves so that a negative electrode active material is inserted therein, and a unit separator interposed between the positive electrode plate and the negative electrode plate; and a case having an accommodation portion in which the electrode assembly and an electrolyte are accommodated, wherein the positive electrode plate and the negative electrode plate are symmetrical to each other on the basis of the unit separator.

Disclosed is a secondary battery. The secondary battery includes an electrode assembly having a plurality of unit electrode bodies, each electrode body including a positive electrode plate having a plurality of positive electrode uneven grooves into which a positive electrode active material is inserted, a negative electrode plate having a plurality of negative electrode uneven grooves located to face the positive electrode uneven grooves so that a negative electrode active material is inserted therein, and a unit separator interposed between the positive electrode plate and the negative electrode plate; and a case having an accommodation portion in which the electrode assembly and an electrolyte are accommodated, wherein the positive electrode plate and the negative electrode plate are symmetrical to each other on the basis of the unit separator.

Systems and methods for a battery pack to power an electric vehicle are provided. The battery pack can include a plurality of battery modules having a plurality of battery blocks. The battery blocks can include a plurality of cylindrical battery cells. A first current collector can include a conductive layer to couple the first current collector with positive terminals of the plurality of cylindrical battery cells. A second current collector can include a conductive layer to couple the second current collector with negative terminals of the plurality of cylindrical battery cells. The first current collector, second current collector, and an isolation layer can include a plurality of apertures to expose the positive terminals of the plurality of cylindrical battery cells. The positive terminals can extend through the plurality of apertures to couple with the conductive layer of the first current collector.

Systems and methods for a battery pack to power an electric vehicle are provided. The battery pack can include a plurality of battery modules having a plurality of battery blocks. The battery blocks can include a plurality of cylindrical battery cells. A first current collector can include a conductive layer to couple the first current collector with positive terminals of the plurality of cylindrical battery cells. A second current collector can include a conductive layer to couple the second current collector with negative terminals of the plurality of cylindrical battery cells. The first current collector, second current collector, and an isolation layer can include a plurality of apertures to expose the positive terminals of the plurality of cylindrical battery cells. The positive terminals can extend through the plurality of apertures to couple with the conductive layer of the first current collector.

The secondary battery includes: a negative electrode layer sheet formed by laminating a negative electrode active material layer on each negative electrode current collector of a negative electrode current collector sheet in which the negative electrode current collectors adjacent to each other are partially connected at a bent connection portion; a positive electrode layer sheet formed by laminating a positive electrode active material layer on each positive electrode current collector of a positive electrode current collector sheet in which the positive electrode current collectors adjacent to each other are partially connected at a bent connection portion; and a solid electrolyte body disposed so as to clamp the negative electrode layer sheet from both sides. A solid battery laminate is formed by bending the negative electrode layer sheet, the positive electrode layer sheet, and the solid electrolyte body at the bent connection portions to form into a substantially zigzag shape.

The secondary battery includes: a negative electrode layer sheet formed by laminating a negative electrode active material layer on each negative electrode current collector of a negative electrode current collector sheet in which the negative electrode current collectors adjacent to each other are partially connected at a bent connection portion; a positive electrode layer sheet formed by laminating a positive electrode active material layer on each positive electrode current collector of a positive electrode current collector sheet in which the positive electrode current collectors adjacent to each other are partially connected at a bent connection portion; and a solid electrolyte body disposed so as to clamp the negative electrode layer sheet from both sides. A solid battery laminate is formed by bending the negative electrode layer sheet, the positive electrode layer sheet, and the solid electrolyte body at the bent connection portions to form into a substantially zigzag shape.

Provided herein are electrochemical systems and related methods of making and using electrochemical systems. Electrochemical systems of the invention implement novel cell geometries and composite carbon nanomaterials based design strategies useful for achieving enhanced electrical power source performance, particularly high specific energies, useful discharge rate capabilities and good cycle life. Electrochemical systems of the invention are versatile and include secondary lithium ion cells, such as silicon-sulfur lithium ion batteries, useful for a range of important applications including use in portable electronic devices. Electrochemical cells of the present invention also exhibit enhanced safety and stability relative to conventional state of the art lithium ion secondary batteries by using prelithiated active materials to eliminate the use of metallic lithium and incorporating carbon nanotube and/or graphene, composite electrode structures to manage residual stress and mechanical strain arising from expansion and contraction of active materials during charge and discharge.