The invention provides a thermal management device for energy storage system, a method for controlling the thermal management device for energy storage system, and an energy storage system, wherein the thermal management device for energy storage system comprises a heat dissipation system, a temperature transducer, a data acquisition module, a management module and a data interaction module; the heat dissipation system comprises refrigerant circulating heat exchange components for heat dissipation of energy storage system, wherein the refrigerant circulating heat exchange components perform heat exchange through phase change of refrigerant; the data acquisition module is connected with the temperature transducer, and is used for acquiring the external environment temperature and the working environment temperature of energy storage system; the management module is used for conducting heating value analysis of energy storage system, and then performing heat dissipation control and management according to the heating value analysis and the external environment temperature; the data interaction module is used for connecting the network for data interaction. The energy storage system comprises battery packs, a battery management system, a bidirectional converter, an energy management system and the above thermal management device for energy storage system. During the control of thermal management, data are acquired in real time to determine and control the refrigerant quantity required for refrigerant circulation and thus realize efficient heat dissipation of energy storage system.

The invention provides a thermal management device for energy storage system, a method for controlling the thermal management device for energy storage system, and an energy storage system, wherein the thermal management device for energy storage system comprises a heat dissipation system, a temperature transducer, a data acquisition module, a management module and a data interaction module; the heat dissipation system comprises refrigerant circulating heat exchange components for heat dissipation of energy storage system, wherein the refrigerant circulating heat exchange components perform heat exchange through phase change of refrigerant; the data acquisition module is connected with the temperature transducer, and is used for acquiring the external environment temperature and the working environment temperature of energy storage system; the management module is used for conducting heating value analysis of energy storage system, and then performing heat dissipation control and management according to the heating value analysis and the external environment temperature; the data interaction module is used for connecting the network for data interaction. The energy storage system comprises battery packs, a battery management system, a bidirectional converter, an energy management system and the above thermal management device for energy storage system. During the control of thermal management, data are acquired in real time to determine and control the refrigerant quantity required for refrigerant circulation and thus realize efficient heat dissipation of energy storage system.

Provided are: an electric storage device having improved reliability in charging a storage battery; and a charging method. This electric storage device is provided with: an SOC calculation section which calculates a charge rate when a battery voltage reached a predetermined value, in the cases where the battery voltage reached the predetermined value when a lithium ion storage battery is being charged; a voltage difference calculation section, which calculates a battery voltage difference corresponding to a difference between the charge rate and a charge rate at which lithium is deposited; a charge complete voltage calculation means, which calculates a charge complete voltage by adding the voltage difference to the battery voltage obtained when the battery voltage reached the predetermined value; and a charge control means, which completes the charging of the lithium ion storage battery in the cases where the battery voltage reached the charge complete voltage.

An output protector for chargers connected to the output terminal of charger, comprising a MOS tube as electronic switch, a light switchover signal terminal, a power output V+ terminal, a power GND terminal connected to the source of the MOS tube, and a power output V− terminal connected to the drain of the MOS tube. The power output V+ terminal and power GND terminal are connected to the output terminal anode and cathode of charger respectively. The light switchover signal terminal is connected to the charging state signal output end of charger. The power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery, and the output protector has a triode on-unit which drives the MOS tube after the power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery respectively.

An output protector for chargers connected to the output terminal of charger, comprising a MOS tube as electronic switch, a light switchover signal terminal, a power output V+ terminal, a power GND terminal connected to the source of the MOS tube, and a power output V− terminal connected to the drain of the MOS tube. The power output V+ terminal and power GND terminal are connected to the output terminal anode and cathode of charger respectively. The light switchover signal terminal is connected to the charging state signal output end of charger. The power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery, and the output protector has a triode on-unit which drives the MOS tube after the power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery respectively.

An output protector for chargers connected to the output terminal of charger, comprising a MOS tube as electronic switch, a light switchover signal terminal, a power output V+ terminal, a power GND terminal connected to the source of the MOS tube, and a power output V− terminal connected to the drain of the MOS tube. The power output V+ terminal and power GND terminal are connected to the output terminal anode and cathode of charger respectively. The light switchover signal terminal is connected to the charging state signal output end of charger. The power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery, and the output protector has a triode on-unit which drives the MOS tube after the power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery respectively.

An output protector for chargers connected to the output terminal of charger, comprising a MOS tube as electronic switch, a light switchover signal terminal, a power output V+ terminal, a power GND terminal connected to the source of the MOS tube, and a power output V− terminal connected to the drain of the MOS tube. The power output V+ terminal and power GND terminal are connected to the output terminal anode and cathode of charger respectively. The light switchover signal terminal is connected to the charging state signal output end of charger. The power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery, and the output protector has a triode on-unit which drives the MOS tube after the power output V+ terminal and power output V− terminal are connected to the anode and cathode of battery respectively.

An electronic device including a voltage divider adaptively changing a voltage division ratio is provided. The electronic device comprises a rechargeable battery; a connector configured to connected the electronic device with an external electronic device; a voltage divider comprising a plurality of capacitors and a plurality of switches for switching an electrical path between each of the plurality of capacitors and the rechargeable battery, wherein the voltage divider is configured to provide three or more voltage division ratios; and a processor operably coupled with the voltage divider and the connector, wherein the processor is configured to: receive an indicator indicating a first voltage of a first power from the external electronic device; select a voltage division ratio from the three or more division ratios, based at least in part on the indicator; and control the plurality of switches on the basis of the selected voltage division ratio, and wherein the voltage divider is configured to: charge a rechargeable battery with a second voltage by dividing the first voltage according to the selected voltage division ratio.

A battery charger circuit having a regulator controller configured to control the switching transistors of a switching voltage regulator. A power path switch is disposed intermediate an output of the switching voltage regulator and a terminal of a battery to be charged, with the power path switch including at least two transistor segments having common respective drain electrodes, common respective source electrodes and separate respective gate electrodes. A power path switch controller operates to sequentially turn ON the at least two transistor segments of the power path switch, preferably in the order of a decreasing ON resistance.

A charger comprises an input circuit that receives power from a power source, a converter circuit, an output circuit, and a switching circuit. The converter circuit is connected between the input circuit and a signal ground of the charger and converts the power from a first voltage to a second voltage. The signal ground is connected to a chassis ground of the charger. The output circuit is connected between an output of the converter circuit and the signal ground and the chassis ground, and outputs the second voltage to an output connector of the charger. The switching circuit is connected between the output of the input circuit and an electrically conducting casing of the output connector, and controls the converter circuit. The switching circuit and the electrically conducting casing of the output connector are not connected to the signal ground and the chassis ground of the charger.