A power storage device (4) includes a power storage unit (1211) including a plurality of cells, and a BMU (1212) configured to control the power storage unit (1211). The BMU (1212) includes an upper limit power acquisition unit (23) configured to acquire, based on a SOC and a temperature of the power storage unit (1211), an upper limit power that is an upper limit of a power output from the power storage unit (1211) or a power input to the power storage unit (1211).

A battery system having a positive output terminal and a negative output terminal is disclosed. The positive output terminal and the negative output terminal are adapted to provide power to an external load. The battery system comprises a relay including a contactor, a battery cell for providing electrical power to the external load via the contactor, and a battery management system. The battery management system includes a controller. The controller is adapted to manage operation of the contactor. The battery management system includes a power supply circuit adapted to provide regulated power to the controller and a standby circuit comprising a bistable latch powered by the battery cell. The standby circuit is coupled to the power supply circuit of the battery management system, to selectively provide power to the power supply circuit.

A battery disconnect unit (100) for disconnecting a battery system (200) comprising at least one battery cell (5), from an electrical system (300). The battery disconnect unit (100) comprises a first terminal (2), a second terminal (4), a first switching element (S1), a second switching element (S2) and a current sensing resistor (6). A first connection of the first switching element (S1) is connected to a first connection of the current sensing resistor (6), and a second connection of the first switching element (S1) is connected to the first terminal (2). A first connection of the second switching element (S2) is connected to a second connection of the current sensing resistor (6), and a second connection of the second switching element (S2) is connected to the second terminal (4).

The present disclosure relates to the technical field of charging. A terminal and a battery charging control device and method are provided. The battery charging control device including a battery connector, a main control circuit and a quick charging switch circuit is adopted. During the regular charging or the quick charging, the main control circuit performs a data communication with the external power adapter via the communication interface, and obtains a charging voltage and a charging current for the battery; if the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold, the main control circuit sends a charging switch-off instruction, such that the controller controls the communication interface to switch off; if the charging voltage is less than or equal to the voltage threshold and the charging current is less than or equal to the current threshold, the main control circuit continues to obtain the charging voltage and the charging current.

A battery pack and charger platform including a voltage coupling circuit comprising an input that receives an input voltage and an output that sends an output voltage, a voltage monitoring circuit having an input coupled to the voltage coupling circuit output and an output, and a power source having an input coupled to the voltage monitoring circuit output, the power source input receives an input voltage representative of a charge instruction.

The invention relates to an electric or hybrid means of transport comprising a high voltage bus and a low voltage bus. The high voltage bus is for delivering energy to at least one propulsion motor. The low voltage bus is for delivering energy to parts operating at low voltage. The electric or hybrid means of transport is equipped with a solar panel, the panel comprising groups of solar cells connected to a primary bus of an associated distributed maximum power point tracker. The distributed maximum power point tracker having a secondary bus to exchange energy with other distributed maximum power point trackers. The secondary bus of at least one of the distributed maximum power point tracker is connected to the low voltage bus, thereby eliminating the need for a DC/DC converter between the high voltage bus and the low voltage bus.

Embodiments of the present invention disclose a battery switch on circuit and a lithium battery. The circuit includes a communication control module, a relay, a communication control circuit, a switch, and a communication connection terminal. A communication signal terminal of the communication control module is connected to a first contact of the relay, a common contact of the relay is connected to the communication connection terminal. A coil of the relay is powered on to control the common contact and the first contact to be gated and is powered down to control the common contact and a second contact of the relay to be gated. The communication connection terminal is configured to connect to an upper computer. The switch includes a first terminal, a second terminal, and a control terminal. A signal from the control terminal of the switch is capable of controlling conduction or disconnection between the first terminal and the second terminal. The first terminal of the switch is connected to a power supply, the second terminal of the switch is connected to a power input terminal, and after the power input terminal is powered on, the coil of the relay is powered on. A signal input terminal is connected to the second contact of the relay, and a control signal output terminal is connected to the control terminal of the switch. Whereby, an effect of normal power-on and communication after the entire circuit is powered off is realized.

Provided is a universal serial bus (USB-C PD) connector, including an oval-shaped plug having an end face, the end face having an oval-shaped outer rim, an oval-shaped recess located within the oval-shaped outer rim, an oval-shaped inner protrusion located within the oval-shaped recess, and an oval-shaped inner recess disposed within the oval-shaped inner protrusion, wherein the oval-shaped inner recess is provided with one or more electrical conductors.

A battery device includes a battery cell and a battery protection circuit. The battery protection circuit includes a microcontroller and a power-supply switch. The microcontroller receives a start signal, a repair signal, and an external-power-indication signal from the outside of the battery device. The power-supply switch is electrically connected to the battery cell. The microcontroller correspondingly outputs an enable signal to the power-supply switch according to the start signal and the repair signal, so that the power-supply switch disconnects the electrical connection between the battery cell and the battery protection circuit. The microcontroller correspondingly outputs a disable signal to the power-supply switch according to the start signal, the repair signal, and the external-power-indication signal, so that the power-supply switch restores the electrical connection between the battery cell and the battery protection circuit.

Discussed is a contactor management method and a battery system to perform the method, wherein the battery system includes a contactor connected between a battery pack and an external device; a voltage measurer to measure a first operation voltage supplied to the contactor; and a controller to determine opening or closing of the contactor based on the first operation voltage measured from the voltage measurer, wherein the controller determines the contactor as open in an opened state when the first operation voltage is not supplied to the contactor, determines the contactor as closed in a closed state when the first operation voltage is supplied to the contactor, and counts each openings and closings of the contactor and determines a replacement time of the contactor based on a sum value of the counts exceeding a predetermined reference value.