A power conversion device is applicable to a power supply system including a first battery and a second battery having a rated voltage different from a rated voltage of the first battery. The power conversion device includes a charging circuit configured to convert AC power input from an AC power supply into DC power and charge the first battery with the DC power, a voltage converter configured to convert a power supply voltage of the first battery and outputs the converted voltage to the second battery, and an interrupting unit configured to be capable of interrupting a supply of the DC power to the voltage converter during charging of the first battery by the charging circuit.

The present invention discloses methods and systems for scheduling and distributing power for electric vehicle chargers, through enabling and disabling a plurality of relays at a system. One of the criteria to allow an authenticated user to use an electric vehicle charger is whether there is enough electricity capacity. When the user is allowed to use a scheduled electric vehicle charger, its location is then sent to the user. Alert messages can be generated if charging does not begin within a first time limit and the cancellation of a reservation will take place if the second time limit is reached.

An apparatus may include a chassis, at least two wheels, and an equipment enclosure that includes an alternating current power source input, at least one direct current output bus, a plurality of rectifiers having an output capacity exceeding 800 amperes, where the plurality of rectifiers is coupled to the alternating current power source input and the at least one direct current output bus, and a plurality of electrical cables for connecting to the at least one direct current output bus, where a total length of the plurality of electrical cables exceeds 800 feet.

Systems, methods, and devices including a plurality of hybrid capacitors for storing energy as both electrical potential and chemical potential. An energy storage bank comprising the plurality of hybrid capacitors is coupled to a battery management system configured to monitor parameters of the plurality of hybrid capacitors and selectively access at least a portion of the plurality of hybrid capacitors to provide electrical power output.

A control method of a multi-battery pack system is provided. The method includes: determining a first reference battery pack based on a charging-discharging state of the multi-battery pack system and battery voltages of enabled battery packs; determining a second reference battery pack based on the charging-discharging state of the multi-battery pack system and battery voltages of non-enabled battery packs; determining a to-be-turned off battery pack and a to-be-turned on battery pack based on a battery voltage of the first reference battery pack and a battery voltage of the second reference battery pack; and controlling to turn off the to-be-turned off battery pack and turn on the to-be-turned on battery pack.

The present invention provides a battery discharge apparatus including: a discharge unit; a monitoring unit including a plurality of power detecting units connected to the discharge unit in parallel and connected to a plurality of batteries, respectively; a plurality of temperature sensors connected to the monitoring unit and sensing a temperature of the plurality of batteries; and a plurality of gas sensors connected to the monitoring unit and sensing a gas of the plurality of batteries.

An assembly for enabling a caregiver to secure a physiological monitoring device to an arm of a user can include the physiological monitoring device a cradle configured to removably secure to the physiological monitoring device and to the user's arm. The physiological monitoring device can include a first connector port configured to electrically connect to a first cable and a first locking tab movable between an extended position and a retracted position. The cradle can include a base, first and second sidewalls, a back wall connected to the base and the first and second sidewalls. The cradle can further include a first opening in the back wall configured to receive the first connector port and a second opening in the first sidewall configured to receive the first locking tab when the physiological monitoring device is secured to the cradle and the first locking tab is in the extended position.

Apparatus for protecting batteries from impact, dust, dirt, moisture, smoke, and flame comprised of a container that accepts modular battery inserts that releasably retain batteries. Apparatus for protecting batteries capable of capturing batteries between insertable structures and the protective container walls. The apparatus can include insertable structures that can be inserted into the container in multiple orientations to provide or restrict access to batteries retained in said insertable structures. The apparatus can include electronics within the container, configured to charge batteries stored in the container either by utilizing an onboard power source such as an additional battery or an external power source such as household alternating current power, or both.

The life of a power storage pack to be mounted on an electric vehicle is prolonged while maintaining user convenience. A monitoring device (1) communicates with a storage device (4) storing power storage packs (2) to be mounted on a electric vehicle (3) traveling at a low speed in a predetermined area. An acquisition unit of the monitoring device (1) acquires parameter information including information of a user who uses the electric vehicle (3) and state information of the power storage packs stored in the storage device (4). A prediction unit of the monitoring device (1) predicts an amount of power consumption of the electric vehicle (3) used by the user, based on the acquired parameter information. A selecting unit of the monitoring device (1) selects a combination of power storage packs to be mounted on the electric vehicle among the power storage packs, based on the predicted amount of power consumption and the acquired state information on the power storage packs.

An automated checkout system uses a shopping cart that is automatically charged when stacked into another shopping cart. Each shopping cart has a front charging connector and a rear charging connector. When a first shopping cart is stacked into a second shopping cart, the front charging connector of the first shopping cart connects with the rear charging connector of the second shopping cart. Electrical power can flow to the first shopping cart via the second shopping cart to charge a battery of the first shopping cart. The second shopping cart may be similarly stacked into a third shopping cart, wherein the second shopping cart receives electrical power from the third shopping cart. The second shopping cart may use this electrical power to charge its own battery or may provide some or all of the electrical power to the first shopping cart to charge the first shopping cart's battery.