Abstract: Methods and systems for detecting and compensating for expansion of rechargeable batteries over time. An expansion detector may be coupled to or positioned proximate a rechargeable battery to monitor for expansion thereof. After expansion exceeding a selected threshold is detected, the expansion detector may report the expansion to an associated processing unit. The processing unit may undertake to arrest further rechargeable battery expansion by modifying or changing one or more characteristics of charging and/or discharging circuitry coupled to the rechargeable battery. For example, the processing unit may charge the rechargeable battery at a lower rate or with reduced voltage after detecting expansion.

Abstract: Methods and systems for detecting and compensating for expansion of rechargeable batteries over time. An expansion detector may be coupled to or positioned proximate a rechargeable battery to monitor for expansion thereof. After expansion exceeding a selected threshold is detected, the expansion detector may report the expansion to an associated processing unit. The processing unit may undertake to arrest further rechargeable battery expansion by modifying or changing one or more characteristics of charging and/or discharging circuitry coupled to the rechargeable battery. For example, the processing unit may charge the rechargeable battery at a lower rate or with reduced voltage after detecting expansion.

Abstract: A battery assembly includes a battery cell with leads extending from the battery and a circuit including a substrate and contacts that extend from the substrate. The leads are coupled to the contacts by mechanical or adhesive bonds located on sections of the contacts extending from the substrate. In various implementations, the circuit may include a variety of different components coupled to the substrate. Such components may be operable to perform a variety of functions such as regulating, monitoring, controlling, and/or otherwise managing the battery cell. Such components may include one or more battery management units, safety circuits, capacity gauges, and/or other components.

Abstract: Methods and systems for detecting and compensating for expansion of rechargeable batteries over time. An expansion detector may be coupled to or positioned proximate a rechargeable battery to monitor for expansion thereof. After expansion exceeding a selected threshold is detected, the expansion detector may report the expansion to an associated processing unit. The processing unit may undertake to arrest further rechargeable battery expansion by modifying or changing one or more characteristics of charging and/or discharging circuitry coupled to the rechargeable battery. For example, the processing unit may charge the rechargeable battery at a lower rate or with reduced voltage after detecting expansion.

Abstract: A computing device can include a housing, a display secured by the housing, a charging coil included in a back side of the housing, the back side of the housing being on an opposite side from the display, and at least one magnet adjacent to the charging coil.

Abstract: Exemplary energy storage devices, battery cells, and batteries of the present technology may include a cathode active material disposed on a cathode current collector. The devices may also include an anode active material disposed on an anode current collector. At least one current collector of the cathode current collector or the anode current collector may include a continuous layer of a carbon-containing material positioned between the current collector and the active material.

Abstract: An electronic device includes a frame and a battery. The frame is configured to be worn on a user's body. The battery is supported by the frame and includes a first cell and a second cell in electrical parallel. The first cell has a first capacity and the second cell has a second capacity that is different from the first capacity.

Abstract: A rolled-electrode battery cell includes multiple, stacked electrode rolls that are stacked along a stacking axis. Each of the electrode rolls has its electrode tabs bonded to an end of the electrodes, so that the electrode tabs extend from the ends of the electrodes along the winding direction of the electrodes. The stacked electrode rolls are bent around respective bending axes that are parallel to their winding axes, and perpendicular to the stacking axis and the winding direction of the electrodes.

Abstract: A flexible, jelly-roll type battery cell with a hollow core is disclosed. The battery cell includes a pair of electrodes wound together around a hollow core, a plurality of electrode tabs, each coupled to a separate one of the electrodes, and a flexible outer wrapper enclosing the pair of electrodes.

Abstract: A battery circuit includes a battery cell, monitoring circuitry configured to determine one or more parameters of the battery cell, a pouch enclosing the battery cell and the monitoring circuitry in a sealed, internal cavity, the pouch being configured to inhibit ingress of external fluid to the sealed, internal cavity, and an electrical connector exterior the pouch and electrically connected to the battery cell and the monitoring circuitry via one or more paths extending through the pouch and into the internal cavity.

Abstract: Disclosed are a stacked-electrode battery cell that has offset electrode-to-terminal bonds, and a method for manufacturing such a cell. The stacked-electrode battery cell can comprise an external connection terminal that includes a flat tab, and a plurality of flat electrodes stacked along a first coordinate axis and collectively forming at least a portion of an anode or a cathode of the battery cell. A first electrode of the plurality of flat electrodes is bonded to a first bond region of the tab and a second electrode of the plurality of flat electrodes is bonded to a second bond region of the tab, where the first bond region and the second bond region are non-overlapping along at least one coordinate axis perpendicular to the first coordinate axis.

Abstract: An electronic device includes a frame and a battery. The frame is configured to be worn on a user's body. The battery is supported by the frame and includes a first cell and a second cell in electrical parallel. The first cell has a first capacity and the second cell has a second capacity that is different from the first capacity.

Abstract: 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.

Abstract: Battery assemblies, as well as methods and processes for forming same. A battery assembly can include a first tab electrically connected to a first terminal of a battery and a second tab electrically connected to a second terminal of the battery. A battery assembly can also include a first conductive path (aka first section) having a first end, and a second conductive path (aka second section) having a second end. Another end of the first conductive path can be coupled an electronic device, such as an electric circuit. Another end of the second conductive path can be coupled to the electronic device as well. A space separates the first and second ends; the space formed by removing at least one portion of a U-shaped conductive path. The first conductive path and the first battery tab are connected. The second conductive path and the second battery tab are also connected.

Abstract: Examples disclosed herein relate to a continuous separator having perforations to help reduce or prevent wrinkling of the separator when producing curved electrode stacks. One example provides a battery comprising a plurality of discontinuous electrode layers, and a continuous separator separating the discontinuous electrode layers, the continuous separator having perforations extending at least partially through a depth of the continuous separator in a folded region of the continuous separator.

Abstract: A rolled-electrode battery cell includes multiple, stacked electrode rolls that are stacked along a stacking axis. Each of the electrode rolls has its electrode tabs bonded to an end of the electrodes, so that the electrode tabs extend from the ends of the electrodes along the winding direction of the electrodes. The stacked electrode rolls are bent around respective bending axes that are parallel to their winding axes, and perpendicular to the stacking axis and the winding direction of the electrodes.

Abstract: A jelly-roll type battery cell with a hollow core and no rigid outer casing is disclosed.

Abstract: Methods and systems for detecting and compensating for expansion of rechargeable batteries over time. An expansion detector may be coupled to or positioned proximate a rechargeable battery to monitor for expansion thereof. After expansion exceeding a selected threshold is detected, the expansion detector may report the expansion to an associated processing unit. The processing unit may undertake to arrest further rechargeable battery expansion by modifying or changing one or more characteristics of charging and/or discharging circuitry coupled to the rechargeable battery. For example, the processing unit may charge the rechargeable battery at a lower rate or with reduced voltage after detecting expansion.

Abstract: A battery circuit includes a battery cell, monitoring circuitry configured to determine one or more parameters of the battery cell, a pouch enclosing the battery cell and the monitoring circuitry in a sealed, internal cavity, the pouch being configured to inhibit ingress of external fluid to the sealed, internal cavity, and an electrical connector exterior the pouch and electrically connected to the battery cell and the monitoring circuitry via one or more paths extending through the pouch and into the internal cavity.

Abstract: Exemplary energy storage devices, battery cells, and batteries of the present technology may include a cathode active material disposed on a cathode current collector. The devices may also include an anode active material disposed on an anode current collector. At least one current collector of the cathode current collector or the anode current collector may include a continuous layer of a carbon-containing material positioned between the current collector and the active material.