Systems and methods for estimating a state of charge of a hearing aid rechargeable battery for rapid user feedback and charge management are provided. The method includes detecting a rechargeable battery of a hearing aid received at a battery charger. The method includes retrieving a last state of charge (SoC) of the rechargeable battery and a time in use of the rechargeable battery. The time in use is a time the hearing aid is out of the battery charger. The method includes estimating a current state of charge (SoC) of the rechargeable battery based on the last SoC and the time in use of the rechargeable battery. The method includes causing a display of the battery charger to present the estimated current SoC.

A battery data management system includes a communication device for obtaining state data of a battery from a battery management system and transmitting the state data of the battery to an outside and a management server for managing the state data of the battery, received from the communication device through a first network.

The present disclosure provides an energy storage system comprising a plurality of input ports connectable to receive electrical power from one or more energy sources, a plurality of output ports connectable to deliver electrical power to one or more loads, a plurality of battery modules, a switching matrix connected between the plurality of battery modules and the plurality of inputs, and between the plurality of battery modules and the plurality of outputs, the switching matrix configured to selectively connect each battery module to any number of the plurality of input ports or any number of the plurality of output ports, each input port to any number of battery modules, and each output port to any number of battery modules, and a main battery management controller operably coupled to the switching matrix for controlling connections between each battery module and any number of the plurality of input ports or any number of the plurality of output ports.

A method of diagnosing degradation of an electrode active material for a secondary battery including obtaining a first differential curve (dQ/dV) by differentiating an initial charge/discharge curve obtained by performing first charging and first discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and obtaining a second differential curve (dQ/dV) by differentiating a charge/discharge curve obtained by performing second charging and second discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and diagnosing whether a beta phase of the positive electrode active material has been formed by comparing maximum discharge peak values of the first differential curve and the second differential curve.

A tracking device with a screen that displays the mode of the tracking device on a screen. The device modes may include sleep mode, monitor mode, locate mode, and emergency mode. Each mode represents a frequency of transmission and which can be changed by the software developer or by the consumer in their software application. The sleep mode will be the fewest frequency pings and may be the mode in which the tracking device is operating while it is in a geofence. Monitor mode will be a higher frequency of pings and a locate mode may be yet a further increased number of pings per given time interval. The emergency mode will be entered when, for example, the pet is outside of the geofence and the owner needs to receive an intense number of pings to assure proper location, especially if the pet is moving. A charge may be made to the customer to enable readouts showing the mode and battery life left, and that the revenues derived from the customer, and in the case where the tracking device is used for pets, may be shared with the pet store. The user will be able to know the battery life remaining in any of the modes. The software application will communicate with the tracking device to change the frequency of the pings.

Embodiments of the present invention manage a state of charge of a rechargeable battery for extended storage by determining a manual override for a storage protocol is not activate for a rechargeable battery associated with a battery charger and an electronic device. Receiving battery data, environment data, and historical data for the rechargeable battery associated with a battery charger. Embodiments of the present invention determine to activate the storage protocol for the rechargeable battery based on the battery data, the environment data, and the historical data and discharge the rechargeable battery to a preset state of charge level based on the storage protocol.

A portable electrocardiographic waveform measurement device using a battery as a power source includes a plurality of electrodes configured to measure an electrocardiographic waveform, a vibration unit configured to generate vibration, and a control unit configured to execute measurement processing for the electrocardiographic waveform. The control unit vibrates the vibration unit in a first vibration pattern when the measurement processing for the electrocardiographic waveform is started, and vibrates the vibration unit in a second vibration pattern when the measurement processing for the electrocardiographic waveform is ended.

Provided are a voltage sensing circuit, including a first sub-sensing circuit including a light emitting device, and electrically connected in parallel to a battery, and a second sub-sensing circuit including a light receiving device optically coupled to the light emitting device, and electrically isolated from the first sub-sensing circuit. The light emitting device is for generating an optical signal in response to a voltage across the light emitting device. The second sub-sensing circuit is for outputting a voltage sensing signal indicating a level of voltage across the battery in response to the optical signal. When the voltage across the battery is equal to a first reference voltage indicating an overvoltage state of the battery, a second reference voltage which is lower than the first reference voltage is applied across the light emitting device. The second reference voltage is lower than a threshold voltage of the light emitting device.

In an aspect a system for energy tracking in an electric aircraft. A system includes at least a battery pack. At least a battery pack includes a plurality of battery modules. A system includes a sensing device. A sensing device is configured to detect a battery parameter of at least a battery module of a plurality of battery modules. A sensing device is configured to generate battery data as a function of a detected battery parameter of at least a battery module. A system includes a computing device. A computing device is in electronic communication with a sensing device. A computing device is configured to receive battery data from a sensing device. A computing device is configured to determine an energy amount of a plurality of battery packs as a function of battery data.

A determination method for a battery state, the method includes: obtaining an environment temperature sequence of an environment where a battery is located in a preset time period, the environment temperature sequence including: a plurality of environment temperatures corresponding one-to-one to a plurality of time nodes; determining, according to the time nodes corresponding to the plurality of environment temperatures of the environment temperature sequence, accumulated duration that the environment temperatures greater or equal to at least one environment temperature threshold; determining a state of health of the battery according to the accumulated duration and a reference duration threshold; and determining, under the condition that the battery is in an unhealthy state, a regulation strategy for a charging mode, so as to charge the battery based on the adjusted charging mode.