A power management and selection system for a class 8 tractor trailer, directs excess solar and vehicular charge capacity to an auxiliary load by measuring available charge capacity from a reefer power system including a reefer battery, solar panel and charge controller for moderating solar power to the reefer batter, and measuring available charge capacity from a cab vehicle power system including a propulsion system battery and alternator. Charge logic, in a selector configured for switching charge capacity to the auxiliary load, determines which of the reefer power system and cab vehicle power system has the most potential excess charge capacity, and directs the determined excess charge capacity to the auxiliary load, while the measured available charge capacity remains sufficient for powering the respective reefer power system or cab vehicle power system.

A protection circuit and a control circuit of a secondary battery are provided, for example. A circuit with low power consumption is provided. A circuit with a high degree of integration is provided. The control circuit includes a first resistance circuit, a second resistance circuit, a comparator, and a memory circuit. One terminal of the first resistance circuit is electrically connected to a positive electrode of a secondary battery; the other terminal of the first resistance circuit is electrically connected to a first input terminal of the comparator and one terminal of the second resistance circuit; the memory circuit has a function of retaining first data; the control circuit has a function of generating a first signal and a second signal by using the first data, a function of adjusting the resistance of the first resistance circuit by supplying the first signal to the first resistance circuit, a function of adjusting the resistance of the second resistance circuit by supplying the second signal to the second resistance circuit, and a function of stopping one of charging and discharging of the secondary battery in accordance with output from the comparator; and the memory circuit includes a capacitor that includes a ferroelectric layer as a dielectric layer.

A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.

In a computing device that includes multiple device sections, one or more rechargeable battery power sources can be placed in each device section. Not only does this approach provide valuable space for multiple batteries, but it can also present the option of powering each device section from any one or both of the battery power sources. However, using multiple battery power sources in a computing device can present challenges in effectively charging the battery power sources using an external power source. This technology adds an independent common charge controller that may bypass the charge circuits for each battery pack based on outputs from fuel gauges internal to each of the battery packs. This permits fast battery charging, while remaining within current and voltage limits that are dependent on the battery state of charge to preserve battery life.

This system is directed to a mobile platform having a power array carried by the mobile platform, connected to a distribution hub adapted to provide power to a base power source; an input controller having input computer readable instructions adapted to deliver power to a set of storage units from the base power source, the set of storage power units carried by the mobile platform; an output controller connected to the set of storage units having output computer readable instructions adapted to receive charge requirements from a load connected to the output controller, retrieving from a device lookup table included in the output controller a load type having charge specifications and delivering power to the load according to the charge specifications; and, an external power source connected to the distribution bus for proving power to the base power source from the external power source.

The present disclosure is directed to an ultracapacitor module comprising a housing and terminals, the terminals exposed through the housing, the housing containing one or more internal capacitor cells and one or more integrated, internal bypass diodes arranged together such that the ultracapacitor module additionally comprises an integrated, internal bypass circuit connected in parallel with the terminals. The present disclosure also is directed to an ultracapacitor module comprising a housing and terminals, the terminals exposed through the housing, the housing containing one or more internal capacitor cells and at least one set of one or more integrated, internal bypass diodes connected in parallel to the at least one or more internal capacitor cells, such that the ultracapacitor module additionally comprises an integrated, internal bypass circuit.

In order to ensure reliable power for charging electric vehicles is available at each charging station at a charging site having multiple charging stations, the systems and methods disclosed herein provide for charge transfers between batteries of such charging stations. A plurality of charging stations at a charging site are connected via a direct current (DC) bus in order to transfer energy between the charging stations, such as to balance the energy stored at the respective batteries of the charging stations. Each charging station includes a system controller controlling operation of the charging station and a DC bus connection to provide DC current from the battery to the DC bus and to provide DC current from the DC bus to the battery, as controlled by the system controller. A centralized management system may also communicate with and control aspects of operation of the respective system controllers of the charging stations.

An energy storage system stores potential energy and providing a regulated output of electrical energy for powering an electrical load. The system includes an array of storage capacitors including a plurality of storage capacitors coupled in series. A balance control device balances the voltage on each of the storage capacitors in the array. An input control device manages the input for charging the storage capacitor array. An output power supply has an input coupled to the storage capacitor array and provides regulated power to an electrical load. A power monitor device electrically decouples the storage capacitor array from the electrical load when the total voltage of the storage capacitor array falls below a preset minimum level.

A voltage measurement device includes: a plurality of voltage detection circuits which measure cell voltages of a plurality of cells connected in series. Each of the plurality of voltage detection circuits includes: a device address generating circuit which generates a device address according to a first address assignment command received from a preceding voltage detection circuit located at a preceding stage; and an address assignment command generating circuit which generates a second address assignment command according to the first address assignment command, and sends the second address assignment command to a next voltage detection circuit located at a next stage.

Embodiments are disclosed of an electronic power conversion apparatus. The apparatus includes a first circuit comprising a first plurality of bidirectional switches coupled in parallel and a second circuit comprising a second plurality of bidirectional switches coupled in parallel. The apparatus further includes a power converter circuit coupling the first and the second circuit. The apparatus includes a control circuit operatively coupled to the first and second plurality of bidirectional switches. The control circuit controls a state of each of the first and second plurality of bidirectional switches.