Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, containing a Si—C composite within a porous structure and including a carbon-based conductive additive, wherein the Si—C composite is at least 30% Si by weight, and the material is at least 85% Si—C composite. The rechargeable battery cell may also include a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having a conductive current collector coated with a composite containing a carbon-based material, a cathode configured as a source of Li ions, an electrolyte capable of carrying Li-ions between the anode and the cathode, and a separator between the anode and the cathode, the separator having a thickness of less than 20 microns. Methods of charging the rechargeable battery cells are also disclosed.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, and a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45. Methods of charging rechargeable battery cells disclosed herein under conditions sufficient to enable charging of at least 70% of usable capacity to the rechargeable battery cell within 15 minutes, are also disclosed.

Abstract: A method for cooling a battery unit of an electric vehicle, the method includes fluidly coupling a daytime passive radiative cooling (DPRC) based cooling unit to a battery unit cooling element that is in fluid communication with the battery unit; and cooling the battery unit cooling element by the DPRC based cooling unit.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode containing a Si—C composite within a porous structure, a metal oxide-based cathode configured as a source of Li ions, an electrolyte capable of carrying Li-ions between the anode and the cathode, and a separator between the anode and the cathode. The rechargeable battery may have an interface between the anode and the cathode that is pressurized in an amount sufficient to manage volumetric changes during charging and discharging processes.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, containing a Si—C composite within a porous structure and including a carbon-based conductive additive, wherein the Si—C composite is at least 30% Si by weight, and the material is at least 85% Si—C composite. The rechargeable battery cell may also include a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having a conductive current collector coated with a composite containing a carbon-based material, a cathode configured as a source of Li ions, an electrolyte capable of carrying Li-ions between the anode and the cathode, and a separator between the anode and the cathode, the separator having a thickness of less than 20 microns. Methods of charging the rechargeable battery cells are also disclosed.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having a conductive current collector coated with a composite containing at least 30% Si by weight, a cathode configured as a source of Li ions, an electrolyte capable of carrying Li-ions between the anode and the cathode, and a separator between the anode and the cathode, the separator having a porosity of at least 38%. Methods of charging such rechargeable battery cells are also disclosed.

Abstract: Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, and a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45. Methods of charging rechargeable battery cells disclosed herein under conditions sufficient to enable charging of at least 70% of usable capacity to the rechargeable battery cell within 15 minutes, are also disclosed.

Abstract: A structural battery that consists essentially of (a) a frame that consists essentially of frame conductive elements, frame insolating elements and one or more fluid conductive paths; (b) one or more inner space pairs, each inner space pair (i) consists essentially of a first inner space and a second inner space, (ii) is associated with a fluid conductive path of the one or more fluid conductive paths, (iii) and has the first inner space located at one side of the fluid conductive path and has the second inner space located at another side of the fluid conductive path; (c) one or more cell cores pairs, each cell cores pair (i) consists essentially of a first cell core and a second cell core, (ii) is associated with the fluid conductive path of the one or more fluid conductive paths, and (iii) has the first cell core located within a first inner space associated with the fluid conductive path and has the second cell core located within a second inner space associated with the fluid conductive path.

Abstract: An electrochemical electrode that includes electrode active material, and a current conductor that includes a coated portion that is coated with the electrode active material, a heat transfer portion and a current pad. The heat transfer portion and the current pad are external to the electrode active material. The current pad differs from the heat transfer portion.

Abstract: A charging system that may include a booster unit; a main charging unit that has a charging capability and is configured to use, during a first charging phase, a first part of the charging capacity for charging battery cells by providing a high-C charging current of at least 4 C. The main charging unit is further configured to use a second part of the charging capacity, during the first charging phase, to charge the booster unit. The first part of the charging capacity is limited by a first charging current limitation of the battery cells.

Abstract: An electrochemical device that includes an electrochemical cell. The electrochemical cell includes a thermal conductive path that thermally couples one or more interior elements of the electrochemical cell to an external part of the electrochemical cell.