A method of displaying a residual capacity of a secondary battery causes a computer of a display device to calculate a residual capacity of a secondary battery that stores electric power for driving a motor-driven vehicle based on an estimated value of an open-circuit voltage of the secondary battery storing the residual capacity calculated at the time of stopping of supply of electric power of the secondary battery and displaying the residual capacity at the time of stopping of supply of electric power on a display at the time of starting of supply of electric power of the secondary battery and subsequently displaying the residual capacity of the secondary battery on the display within a range with an upper limit value and a lower limit value with respect to the residual capacity at the time of stopping of supply of electric power.

A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

The present application provides a thermal runaway detection method and a battery management system, which can effectively detect occurrence of thermal runaway of a battery. The method includes: acquiring at least one parameter of a cooling medium of a battery, the battery including a heat conducting apparatus, and the cooling medium being contained in the heat conducting apparatus; and determining, when the at least one parameter satisfies a preset condition, that thermal runaway occurs in the battery.

A battery box, including a box body and an LED lamp string. A circuit board mounting groove and a battery placement groove are disposed in the box body, a power supply source is disposed in the battery placement groove, and a circuit board and a cover plate are disposed in the circuit board mounting groove. A power source terminal seat is disposed at one side of the circuit board, at least two terminal plugholes are disposed in the power source terminal seat, a through-line hole is disposed on a side wall of each of the terminal plugholes facing the box body, a collosol groove is between the through-line hole and the power source terminal seat, power source plug terminals are disposed at one end of the LED lamp string, and the power source plug terminals are correspondingly inserted into the terminal plugholes respectively.

Methods for diagnosing failure mechanisms and for predicting lifetime of metal batteries include monitoring rest voltage and Coulombic Efficiency over relatively few cycles to provide profiles that indicate, by the trends thereof, a particular failure mechanism (e.g., electrolyte depletion, loss of metal inventory, increased cell impedance). The methods also include cycling over relatively few cycles an anode-free cell, having the same cathode and electrolyte as the metal battery, but with a current collector instead of the anode. Discharge capacity is monitored and profiled, and a discharge capacity curve is fitted to the discharge capacity profile to discern a capacity retention per cycle. The lifetime of the metal battery is determined using the capacity retention per cycle discerned from the anode-free cell. Related systems include a metal-based battery and an anode-free cell or a battery cell reconfigurable between a metal-based and an anode-free cell.

Methods and system are provided for a discharge system. In one example, an emergency response vehicle, comprising a battery discharge system having a charging connector configured to electrically couple a capacitor of the emergency response vehicle to a battery of an electric vehicle.

The present disclosure discloses a charging indication method. The method includes: acquiring a current ratio of a remaining battery capacity to a total battery capacity; determining a target curvature angle of a flexible display screen associated with a terminal based at least on the current ratio; and controlling the flexible display screen to present the target curvature angle.

A battery master disconnect switch includes a front panel and a back panel. The front panel has a selector knob for selecting between multiple positions. The back panel has a primary terminal, a secondary terminal, and an auxiliary terminal. The primary terminal is for connection, using a first cable, to a primary battery. The secondary terminal is for connection, using a second cable, to a secondary battery. The auxiliary terminal is for enabling a device. The device receives power for any of the positions of the selector knob. The battery master disconnect switch can present a voltage for the primary, the secondary, or both the primary and secondary batteries.

Provided herein are systems, methods and apparatuses for a battery powered electroplating barrel and methods of use.

A medicine removal detection system is provided that includes a medication device and a storage member in a sheet shape storing the medication device. The medication device includes medicine, a secondary battery, and a signal transmission unit that transmits a signal indicating a state of the secondary battery. The storage member includes the electric current supply line for supplying an electric current to the secondary battery of the medication device, and is configured such that a supply environment of an electric current to the secondary battery changes when the medication device is taken out. The signal transmission unit transmits a signal indicating a state change of the secondary battery based on a change in the supply environment of an electric current to the secondary battery of the storage member.