Abstract: A battery may include an enclosure that defines an interior volume, an electrode cell disposed within the interior volume, and a pair of retaining elements. The electrode cell may include a pair of notches formed therein. The pair of retaining elements may be disposed within volumes defined by the pair of notches. The pair of retaining elements may be connected to the enclosure and may be configured to engage with a respective notch of the pair of notches to arrest movement of the electrode cell with respect to the enclosure.

Abstract: A battery comprising at least one current collector including a first surface and a second surface opposite the first surface, where the at least one current collector is characterized by a longitudinal body section and a lateral body section extending from the longitudinal body section, a first active material positioned on the first surface on the longitudinal body section, and a second active material positioned on the first surface on the lateral body section.

Abstract: The disclosure is directed to blended anode materials including at least two types of electrochemically active components possessing different redox potentials. The anode design renders improved chemical and structural stability to that of the conventional single-phase graphite anode particularly at high and/or low electrochemical potentials.

Abstract: A battery includes an enclosure, a battery management unit (BMU), a conductive trace including conductive particles disposed on a surface of the enclosure and electrically coupled with the BMU to form a closed-loop electrical path. The BMU is configured to detect a resistance in the closed-loop electrical path caused by a percolation of the conductive particles, and determine a swollen condition of the battery based on the resistance.

Abstract: This disclosure relates generally to measuring thermal signature of battery cells and components by measuring DSC curves of battery components.

Abstract: Described are pre-lithiated anode active materials, lithium-ion electrochemical cells comprising pre-lithiated anode active materials, methods for preparing pre-lithiated anode active materials, and lithium-ion electrochemical cells comprising pre-lithiated anode active materials. The disclosed processes are useful for adapting various methods for manufacturing for lithium-ion electrochemical cells with modifications to achieve pre-lithiation. The pre-lithiation process used by some embodiments described herein include treating an incomplete lithium-ion cell structure with a lithiation redox agent prior to injecting electrolyte into the cell, using techniques similar to the electrolyte injection process.

Abstract: A battery may include an enclosure and an electrode cell disposed within the enclosure. A first pair of notches may be formed in the enclosure. Each notch of the first pair of notches may include a protrusion that extends into the enclosure. A second pair of notches may be formed in the electrode cell. The first pair of notches may be aligned with the second pair of notches. The protrusions may be configured to engage with the second pair of notches when the cell moves within the enclosure.

Abstract: A battery may include an enclosure that defines an interior volume, an electrode cell disposed within the interior volume, and a pair of retaining elements. The electrode cell may include a pair of notches formed therein. The pair of retaining elements may be disposed within volumes defined by the pair of notches. The pair of retaining elements may be connected to the enclosure and may be configured to engage with a respective notch of the pair of notches to arrest movement of the electrode cell with respect to the enclosure.

Abstract: Electrolytes are described with additives that provide good shelf life with improved cycling stability properties. The electrolytes can provide appropriate high voltage stability for high capacity positive electrode active materials. The core electrolyte generally can comprise from about 1.1M to about 2.5M lithium electrolyte salt and a solvent that consists essentially of fluoroethylene carbonate and/or ethylene carbonate, dimethyl carbonate and optionally no more than about 40 volume percent methyl ethyl carbonate, and wherein the lithium electrolyte salt is selected from the group consisting of LiPF6, LiBF4 and combinations thereof. Desirable stabilizing additives include, for example, dimethyl methylphosphonate, thiophene or thiophene derivatives, and/or LiF with an anion complexing agent.

Abstract: The disclosed technology relates to a battery utilizing a dampening layer to prevent a failure of the battery. The battery includes an enclosure, a set of electrodes enclosed within the enclosure, and a dampening layer disposed within the set of electrodes. The dampening layer partitions the set of electrodes into a first subset of electrodes and a second subset of electrodes. The dampening layer is configured to absorb a mechanical impact on the enclosure to prevent a failure of at least one of the first subset of electrodes and the second subset of electrodes. The dampening layer may be formed at least one of a polymer, metal, and ceramic.

Abstract: Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt.

Abstract: Battery designs are provided that exhibit commercially suitable cycling properties for consumer electronics with silicon based active materials in the electrodes. The batteries can have stacked or wound electrodes and suitable electrode designs.

Abstract: The disclosed technology relates to a set of battery tabs. The battery tabs include a first tab forming an elongated member, a second tab forming an elongated member, and a unitary seal surrounding a portion of the respective elongated members of the first tab and the second tab. The unitary seal spaces the first tab apart from the second tab to create a gap between the first tab and the second tab. The first tab and second tab each connect to respective electrodes enclosed within a pouch of a battery cell to allow the cell's energy to be transferred to an external component.

Abstract: Battery designs are provided that exhibit commercially suitable cycling properties for consumer electronics with silicon based active materials in the electrodes. The batteries can have stacked or wound electrodes and suitable electrode designs.

Abstract: The disclosed technology relates to electrodes of a battery cell. The electrodes include a current collector having a first non-rectangular shape, an active coated region having a second non-rectangular shape, an insulator coated region having a third non-rectangular shape, and an uncoated tab disposed adjacent to the insulator coated region. The insulator coated region is disposed along a periphery of the current collector along a plurality of sides or edges of the current collector providing several locations for the tab to be positioned.

Abstract: Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt.

Abstract: The disclosed technology relates to a battery utilizing a dampening layer to prevent a failure of the battery. The battery includes an enclosure, a set of electrodes enclosed within the enclosure, and a dampening layer disposed within the set of electrodes. The dampening layer partitions the set of electrodes into a first subset of electrodes and a second subset of electrodes. The dampening layer is configured to absorb a mechanical impact on the enclosure to prevent a failure of at least one of the first subset of electrodes and the second subset of electrodes. The dampening layer may be formed at least one of a polymer, metal, and ceramic.

Abstract: Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt.

Abstract: Electrolytes are described with additives that provide good shelf life with improved cycling stability properties. The electrolytes can provide appropriate high voltage stability for high capacity positive electrode active materials. The core electrolyte generally can comprise from about 1.1M to about 2.5M lithium electrolyte salt and a solvent that consists essentially of fluoroethylene carbonate and/or ethylene carbonate, dimethyl carbonate and optionally no more than about 40 volume percent methyl ethyl carbonate, and wherein the lithium electrolyte salt is selected from the group consisting of LiPF6, LiBF4 and combinations thereof. Desirable stabilizing additives include, for example, dimethyl methylphosphonate, thiophene or thiophene derivatives, and/or LiF with an anion complexing agent.

Abstract: Electrolytes are described with additives that provide good shelf life with improved cycling stability properties. The electrolytes can provide appropriate high voltage stability for high capacity positive electrode active materials. The core electrolyte generally can comprise from about 1.1M to about 2.5M lithium electrolyte salt and a solvent that consists essentially of fluoroethylene carbonate and/or ethylene carbonate, dimethyl carbonate and optionally no more than about 40 volume percent methyl ethyl carbonate, and wherein the lithium electrolyte salt is selected from the group consisting of LiPF6, LiBF4 and combinations thereof. Desirable stabilizing additives include, for example, dimethyl methylphosphonate, thiophene or thiophene derivatives, and/or LiF with an anion complexing agent.