Power supply system mounted in electric vehicle includes voltage measurement unit that measures a voltage of each of a plurality of cells to ensure both safety of an electric vehicle and convenience of a user. Current measurement unit therein measures a current flowing through the plurality of cells. Temperature measurement unit therein measures a temperature of the plurality of cells. Controller therein determines a current limit value defining an upper limit of a current for suppressing cell deterioration and ensuring safety based on the voltage, the current, and the temperature of each of the plurality of cells measured by voltage measurement unit, current measurement unit, and temperature measurement unit respectively, and that notifies a higher-level controller in electric vehicle of the determined current limit value.

A protection circuit 60 is provided with: switches 61, 62 positioned on a power line PL of an electricity storage element 22 and a load 12; first protection elements 63, 64, 65 connected in parallel with the switches 61, 62 and absorbing surge caused when the switches 61, 62 open and cut off discharge current; and a second protection element 66 connected in parallel with the load and flowing, back to the load, the surge caused when the switches 61, 62 open and cut off the discharge current.

A system and method for contextually aware charging of mobile devices. In accordance with an embodiment, the system comprises a base unit having one or more charger coils, for use in inductive charging; and one or more components within the base unit for providing context-aware connectivity and/or other capabilities with a mobile device. When a mobile device having one or more receiver coils or receivers associated with, is placed in proximity to the base unit, the charger coil is used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device, and at the same time the context-aware connectivity and/or other capabilities are initiated. In accordance with various embodiments, the base unit and/or the mobile device can adapt to a location or use model of interest to provide different functionalities, applications and features.

A method includes: obtaining a current charging current and voltages of n electrochemical cells; if a difference between a highest voltage in the voltages of the n electrochemical cells and a preset upper limit of a single electrochemical cell charging voltage is less than or equal to a preset difference, determining a derating current, where the preset difference is greater than or equal to 0, the highest voltage is less than or equal to the upper limit of the single electrochemical cell charging voltage, and the derating current is less than the current charging current; and indicating to charge the battery with the derating current.

Provided is a lithium ion rechargeable battery charging system with lithium cell balancing, including a lithium ion rechargeable battery and a battery charging device configured for charging the lithium ion rechargeable battery and wherein cell balancing of the lithium ion rechargeable battery cells of the lithium ion rechargeable battery continues for a predetermine period of time once a cell balancing mode begins.

A charging management method includes, in a charging process, determining, by an electronic device, charging behavior information; determining, by the electronic device, a charging control policy based on the charging behavior information; and performing, by the electronic device, charging according to the charging control policy to avoid the electronic device from being in a float-charging state for a long time.

A charge-discharge control circuit, method, device and a storage medium are provided. In some embodiments, the circuit includes: a starting power supply; and a main positive switch unit. In those embodiments, a first terminal of the main positive switch unit is connected to the starting power supply, and a second terminal of the main positive switch unit is connected to a generator of the vehicle and a load of the vehicle. The main positive switch unit is configured to interrupt a current in a first current direction, which is a current direction when the generator charges the starting power supply. The circuit also includes a battery management module configured to detect a voltage of the starting power supply, and control the main positive switch unit to interrupt the current in the first current direction when the voltage of the starting power supply reaches a preset voltage threshold.

A wireless charging system for charging a secondary battery, the wireless charging system including: a central sensor configured to sense a swelling of the secondary battery; a peripheral sensor on a peripheral portion of the central sensor and configured to sense the swelling of the secondary battery; and a sensitivity ratio measurement component configured to measure a ratio of sensitivity of the peripheral sensor to sensitivity of the central sensor, wherein the sensitivity ratio measurement component is configured to stop a charging progress in response to the measured ratio of sensitivity of the peripheral sensor to sensitivity of the central sensor being greater than a preset ratio.

A battery overcharge preventing device according to an embodiment of the present invention includes: a voltage distribution unit connected to both ends of at least one battery cell in a battery module including multiple battery cells, the voltage distribution unit being configured to distribute a voltage of the at least one battery cell according to a preset ratio; a voltage sensing unit operating so as to allow a control current to flow when the voltage distributed by the voltage distribution unit is greater than a preset reference voltage; and a second relay configured to block, by operation of the voltage sensing unit, operation of a first relay that establishes an electrical connection between the battery module and a charging module.

Aspects of the disclosure provide for a circuit. In at least some examples, the circuit includes a logic circuit, a first comparator, a second comparator, and an AND logic circuit. The logic circuit has an output and the first comparator has a first input coupled to an input voltage (VIN) pin, a second input configured to receive a Vin under voltage lockout (VINUVLO) threshold value, and an output. The second comparator has a first input coupled to a power middle (PMID) pin, a second input coupled to a battery pin, and an output and the AND logic circuit has a first input coupled to the output of the logic circuit, a second input coupled to the output of the first comparator, a third input coupled to the output of the second comparator, and an output coupled to an input of a field-effect transistor (FET) control circuit.