Abstract: The disclosure provides a battery pack, a battery thermal management system and a battery thermal management control method. The battery pack includes: a housing, a bracket and a battery cell. The housing is provided with an accommodation space. The bracket is arranged in the accommodation space, which forms at least one accommodation cavity with the accommodation space. The battery cell is arranged in the accommodation cavity, and at least one heat dissipation passage is opened in the accommodation cavity. At least one fan is arranged on one side of the heat dissipation passage to suck or blow air to the heat dissipation passage. Compared with the prior art, the battery pack of the disclosure has an active heat dissipation function while satisfying waterproofing.

Abstract: The disclosure provides a battery pack, a power tool system and a charging system. The battery pack includes a battery pack housing in which a battery cell assembly and a circuit board are mounted. The circuit board is electrically connected with the battery cell assembly. A plurality of Type-C connectors are arranged on the circuit board and electrically connected to the circuit board to realize an electrical connection between the battery cell assembly and the Type-C connectors, and are configured to connect external devices.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

Abstract: A battery pack is provided. The battery pack includes a housing, a plurality of battery sets arranged in the housing, and a power supply system. The power supply system includes a switch control circuit for controlling a series-parallel connection mode of the plurality of battery sets, a main control chip for controlling the discharge of the plurality of battery sets by the switch control circuit, a wake-up circuit for waking up the power supply system of the battery pack when the main control chip receives a wake-up signal, a self-locking circuit connected to the switch control circuit which switches to a disabled state when the self-locking circuit is triggered; and a USB circuit and an extended power output interface, connected to the plurality of battery sets for outputting power to charge external devices.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

Abstract: The present disclosure provides a battery pack power supply system and a battery pack power supply method.

Abstract: The disclosure provides a battery pack, a tool system, a charging system, an adapter and using methods thereof. The battery pack comprises a battery assembly, a charging assembly and a discharging assembly. The charging assembly matches the battery assembly to charge the battery assembly by an external power source. The discharging assembly matches the battery assembly to supply power to the electric equipment through the battery assembly. The discharging assembly comprises a discharging coil and a discharging integration module matched with the discharging coil, so that the battery assembly outputs electrical energy through the discharging assembly in a non-contact manner.

Abstract: A battery pack charging and discharging protection system comprises a battery pack and a power input controlling circuit connected with the battery pack. The system has a voltage regulator unit and a charging and discharging protection unit. The protection unit includes a coupling wake-up circuit, a power-off acceleration circuit, an MCU self-locking circuit and a button detection circuit. The coupling wake-up circuit is connected with the power input controlling circuit. The power-off acceleration circuit is connected with the coupling wake-up circuit. Compared to the conventional technology, the present invention adopts single-wire compatible communication and coupled wake-up mode to achieve the autonomous power-off of the battery pack in time, avoiding over-discharge of the battery caused by the long-term self-consumption of the battery pack.

Abstract: The disclosure provides a battery charging circuit, a battery pack and a battery pack charging system. The battery charging circuit includes a first control switch, a switch control unit and a power supply unit. The first control switch is arranged between the charging positive terminal and the positive electrode of the battery pack, or between the charging negative terminal and the negative electrode of the battery pack, and it is an NMOS transistor with a body diode. The switch control unit is connected to the gate, source, and drain of the first control switch and controls the on-off of the first control switch by sampling a voltage between the source and the drain of the first control switch. The output end of the power supply unit is connected to the power source end of the switch control unit to supply power to the switch control unit.

Abstract: A voltage sampling circuit is provided for sampling voltage of at least two sets of cells in a battery pack includes at least two analog front ends including a low-side analog front end connected to a first set of cells and a high-side analog front end connected to a second set of cells, a subtractor has a positive input end and a negative input end, the positive input end connecting to the output of the high-side analog front end for receiving the analog voltage output by the high-side analog front end. When the first set of cells is connected with the second set of cells in series, the negative input end of the subtractor connecting to the total positive the first set of cells, when the first set of cells is connected with the second set of cells in parallel, the negative input end of the subtractor is grounded.

Abstract: The disclosure provides a battery management system and a battery pack. The battery management system includes at least two analog front-end chips and a control unit. The analog front-end chip is configured to acquire an output voltage, an output current, or a working temperature of a battery. And the control unit controls the analog front-end chip to be powered on and down. When any analog front-end chip is awakened by an external interference signal, the analog front-end chip directly or indirectly supplies power to the control unit to enable the control unit to work, and then the control unit sends a power-down signal to the analog front-end chip to power the analog front-end chip down.

Abstract: The present disclosure provides a battery pack power supply system and a battery pack power supply method.

Abstract: The invention provides a battery pack diagnostic method and a battery pack diagnostic device. The method includes following steps: S1: detecting a battery temperature and an ambient temperature of the battery pack; S2: detecting a pre-load voltage of a discharge port of the battery pack before loading and a post-load voltage after loading; S3: detecting a charge voltage of a charge port of the battery pack and a discharge voltage of the discharge port; S4: detecting whether a hot-plugging interface of the battery pack has a hot-plugging signal. Compared with the prior arts, the present battery pack diagnostic method can quickly and comprehensively detect the battery pack and accurately determine the fault location, which improves a work efficiency of the maintenance personnel.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

Abstract: A battery pack charging and discharging protection system comprises a battery pack and a power input controlling circuit connected with the battery pack. The system has a voltage regulator unit and a charging and discharging protection unit. The protection unit includes a coupling wake-up circuit, a power-off acceleration circuit, an MCU self-locking circuit and a button detection circuit. The coupling wake-up circuit is connected with the power input controlling circuit. The power-off acceleration circuit is connected with the coupling wake-up circuit. Compared to the conventional technology, the present invention adopts single-wire compatible communication and coupled wake-up mode to achieve the autonomous power-off of the battery pack in time, avoiding over-discharge of the battery caused by the long-term self-consumption of the battery pack.

Abstract: The invention provides a voltage balancing system for voltage balancing. The voltage balancing system includes an analog front end arranged in parallel with the cell group, a micro control unit communicating with the analog front end, a communication isolation module connected between the analog front end and the micro control unit, and a balancing module. The input of the balancing module is connected to the cell group to input the total voltage of the cell group. The output of the balancing module is connected to the micro control unit and the communication isolation module to output the operating voltage of the micro control unit and the communication isolation module.

Abstract: A voltage sampling circuit is provided for sampling voltage of at least two sets of cells in a battery pack includes at least two analog front ends including a low-side analog front end connected to a first set of cells and a high-side analog front end connected to a second set of cells, a subtractor has a positive input end and a negative input end, the positive input end connecting to the output of the high-side analog front end for receiving the analog voltage output by the high-side analog front end. When the first set of cells is connected with the second set of cells in series, the negative input end of the subtractor connecting to the total positive the first set of cells, when the first set of cells is connected with the second set of cells in parallel, the negative input end of the subtractor is grounded.

Abstract: DCMD and VMD systems and methods for use in desalination applications are provided. The DCMD and VMD systems employ coated porous hydrophobic hollow fiber membranes. The coatings advantageously function to essentially eliminate pore wetting of the membrane, while permitting substantially unimpeded water vapor permeance through the fiber walls. The DCMD and VMD membranes are characterized by larger fiber bore diameters and wall thicknesses. The membranes substantially reduce the loss of brine sensible heat, e.g., heat loss via conductive heat flux through the membrane wall and the vapor space and, in exemplary embodiments, the brine-side heat transfer coefficient is dramatically enhanced by horizontal/vertical cross flow of brine over the outside surface of the coated fibers. Superior water vapor fluxes are achieved with the systems and methods.

Abstract: A fixed-site-membrane comprising a support structure coated with crosslinked polyvinylamine, wherein the crosslinking agent is a compound comprising a fluoride. The membrane comprises water, such as by being swelled in water vapour. A process for producing the membranes, and the use of such membranes for separation of carbon dioxide (CO2) from gas mixtures are disclosed.

Abstract: DCMD and VMD systems and methods for use in desalination applications are provided. The DCMD and VMD systems employ coated porous hydrophobic hollow fiber membranes. The coatings advantageously function to essentially eliminate pore wetting of the membrane, while permitting substantially unimpeded water vapor permeance through the fiber walls. The DCMD and VMD membranes are characterized by larger fiber bore diameters and wall thicknesses. The membranes substantially reduce the loss of brine sensible heat, e.g., heat loss via conductive heat flux through the membrane wall and the vapor space and, in exemplary embodiments, the brine-side heat transfer coefficient is dramatically enhanced by horizontal/vertical cross flow of brine over the outside surface of the coated fibers. Superior water vapor fluxes are achieved with the systems and methods.