137results about How to "Increase charging voltage" patented technology

A charging method includes a constant-current charging step wherein a constant charge current is supplied to a secondary battery to be charged to a predetermined end voltage; and a constant-voltage charging step wherein the predetermined end voltage is maintained by reducing the charge current after said secondary battery is charged to the end voltage, wherein: said constant-current charging step includes the charging step to be carried out with the end voltage set to OCV which is a voltage when no current is flowing, and with a voltage of a charge terminal of said battery pack set to an overvoltage above said OCV, and said constant-voltage charging step includes the step of reducing the voltage across the charge terminals to the after the voltage across the charge terminals is increased to the overvoltage or after the charge current of the charge terminal is reduced to or below a predetermined current level.

A multi-battery charging system for reduced fuel consumption and emissions for an automotive vehicle. The system starts the vehicle with a start battery in a fuel savings manner, removing electrical torque from the alternator shaft, and allows a second (run) battery to provide all or some of the current required by the vehicle loads as a fuel savings measure. The system also utilizes an electrically heated catalytic converter (EHC) and a third (EHC or storage) battery to provide a 3 to 15 second preheat and/or a 20 second current, during vehicle start, to the EHC heater coil, e.g., of a small EHC located in series with a standard catalytic converter for emissions reduction to reduce emissions during start. The start battery is recharged after start and switched out of the system fully charged for future vehicle starts. The run battery is recharged when its charge level drops below a predetermined level with an on board battery charging device powered from a 115 volt or 220 volt ac power line source external to the vehicle.

The invention relates to high voltage resistant and high temperature resistant safety type electrolyte for a lithium ion battery adopting a manganese material as an anode, and a use thereof, specifically to high voltage resistant and high temperature resistant safety type electrolyte for a lithium ion battery adopting a manganese material as an anode. The electrolyte comprises a non-aqueous organic solvent, a lithium salt, a film forming additive and a stabilizing additive. The electrolyte further comprises: a high voltage resistant and high temperature resistant additive, wherein the high voltage resistant and high temperature resistant additive comprises one selected from Li2B12F12-XHX ( the X is an integer more than or equal to zero and less than or equal to 11), Li2B12Cl12-XHX (the X is an integer more than or equal to zero and less than or equal to 11), or a mixture formed through mixing the Li2B12F12-XHX and the Li2B12Cl12-XHX according to any ratio, the use amount of the high voltage resistant and high temperature resistant additive is 1-15% of the total mass of the electrolyte; a high voltage resistant overcharge-proof additive, wherein the high voltage resistant overcharge-proof additive comprises fluorinated anisole, fluorinated diphenyl sulfide or a mixture formed through mixing the fluorinated anisole and the fluorinated diphenyl sulfide according to any ratio, the use amount of the high voltage resistant overcharge-proof additive is 1-10% of the total mass of the electrolyte. With the present invention, the lithium ion battery adopting the manganese material has performances of high temperature resistance, safety and high voltage resistance, the charging voltage of the manganese material can be increased to more than 4.5 V.

The invention provides a charger outputting different voltages in a self-adaptation mode and an implementation method of the charger. The charger comprises a charging protocol recognition unit and a charging control unit, wherein the charging protocol recognition unit is used for detecting a terminal detecting port, recognizing a charging protocol matched with the mobile terminal and outputting a corresponding feedback signal; the charging control unit is used for feeding back a signal and controlling the output of the voltage regulated in the matched charging protocol to the terminal detecting port. The method includes the steps that the terminal detecting port of the mobile terminal is detected, the charging protocol matched with the mobile terminal is determined, and the current output voltage is changed to the voltage regulated in the charging protocol and then output to the terminal detecting port. According to the embodiment of the charger outputting different voltages in the self-adaptation mode and the implementation method of the charger, the charger can output multiple voltages in the self-adaptation mode, and the requirement of different terminals for voltage can be met; charging voltage can be boosted, large-current charging is guaranteed, EMC is reduced, and the requirement for peripheral components can also be lowered.

A power plant outputs motive power by driving a motor (22) using electric power from a direct-current power source (32). When the direct-current power source (32) has a low temperature, the direct-current power source is rapidly heated, whereby the performance can fully be demonstrated. In the power plant in which a capacitor (30) is installed so as to connect a positive electrode bus (26) and a negative electrode bus (28) of an inverter circuit (24) and the direct-current power source (32) is also installed so as to connect the negative electrode bus (28) of the inverter circuit (24) and a neutral point of the motor (22), when a power source temperature (Tb) of the direct-current power source (32) detected by a temperature sensor (50) is less than or equal to a threshold temperature (Tblow) at which supply of required electric power to the motor (22) is possible, an electronic control unit (40) sets a voltage between terminals of the capacitor (30) higher than normal and also sets a frequency of a carrier wave lower than normal, and performs switching control of transistors (T1 to T6) Thus, a ripple of a neutral point current which flows into the direct-current power source (32) can be increased, whereby it is possible to promote calorification of the direct current power source (32).

A charging system is provided which includes: a secondary battery which includes a heat-resistant member having a heat-resistance property between a negative electrode and a positive electrode thereof; a charging-voltage supply section which supplies a charging voltage for charging the secondary battery; a charge control section which controls the operation of the charging-voltage supply section on the basis of a reference voltage corresponding to the voltage between the negative electrode and the positive electrode in a full-charge state where the lithium-reference electric potential of the negative electrode is substantially zero volts; and a mode-setting acceptance section which chooses and accepts the setting of either of an ordinary charge mode and a high-voltage charge mode, in which if the mode-setting acceptance section accepts the setting of the ordinary charge mode, then the charge control section allows the charging-voltage supply section to supply, to the secondary battery, a first set voltage equal to, or below, the reference voltage as the charging voltage, and if the mode-setting acceptance section accepts the setting of the high-voltage charge mode, then the charge control section allows the charging-voltage supply section to supply, to the secondary battery, a second set voltage above the reference voltage as the charging voltage, so that the secondary battery is charged.

Each of a plurality of pump stages has an input node and an output node and performs a charge pump operation in response to any one of the first and second clock signals. The plurality of pump stages include a first pump stage, in which a charge transfer transistor is connected between the input node and the output node. One end of a pump capacitor is connected to the output node, and the other end is supplied with one of the first and second clock signals corresponding to the first pump stage. A connection switcher connects to the gate of the charge transfer transistor any one of the output node of a pump stage which is supplied with one of the clock signals corresponding to the first pump stage and the input node of a pump stage which is supplied with the other clock signal not corresponding to the first pump stage and which is included in a pump stage row not including the first pump stage.

A nonaqueous electrolyte secondary battery of the invention has a positive electrode having a positive electrode active material, a negative electrode, and a nonaqueous electrolyte having electrolyte salt in a nonaqueous solvent. The electric potential of the positive electrode active material is 4.4 to 4.6 V relative to lithium, and the nonaqueous electrolyte contains a compound expressed by structural formula (I) below. The quantity of compound added is preferably 0.1% to 2% by mass. Also, the positive electrode active material preferably comprises a mixture of a lithium-cobalt composite oxide which is LiCoO₂ containing at least both zirconium and magnesium and a lithium-manganese-nickel composite oxide that has a layer structure and contains at least both manganese and nickel. Thanks to such structure, a nonaqueous electrolyte secondary battery can be provided that is charged to charging termination potential of 4.4 to 4.6 V relative to lithium and that has enhanced overcharging safety.

[Chemical Formula 1]

A battery charger for a portable electronic device includes a linear charger to generate a substantially constant current for charging the battery and a switching voltage regulator to convert power supplied by an external adapter to a supply voltage for the linear charger. A feedback circuit controls operation of the switching voltage regulator so that the voltage supplied to the linear charger is substantially equal to the combination of the battery voltage and the drain-to-source voltage of the linear charger. In this way, power dissipation by the linear charger is minimized without requiring the use of a high accuracy current limited adapter.

The invention discloses an electrolyte containing an inorganic additive and a lithium-ion battery containing the electrolyte. The electrolyte comprises an organic solvent, a lithium salt electrolyte, the inorganic additive and an organic additive; the inorganic additive is one or a mixture of two or more of dry aluminum oxide, dry silicon oxide, dry magnesium oxide, dry zinc oxide and dry titanium dioxide and has the particle size less than 100 nm. The electrolyte provided by the invention can reduce the surface activity of a cathode material, thereby suppressing side reaction between an electrode material and the electrolyte, increasing a battery charging voltage and improving the cycle comprehensive performance of the electrolyte, can improve wettability and good imbibition of the electrolyte for a diaphragm and suppress a micro-short circuit, can efficiently improve the electrochemical performance of a lithium battery for neutralizing free harmful gases such as hydrogen fluoride and fluorine gas, and can reduce water content in the electrolyte.

A method of charging a battery includes following steps: First, a charging voltage is provided to charge the battery. Afterward, a charging control variable is judged whether to reach to an adjustment value. Afterward, the charging voltage is adjusted with a first voltage difference to continuously charge the battery when the charging control variable reaches to the adjustment value. Afterward, a health state value of the battery is judged whether less than or equal to a critical health state value. Finally, the charging voltage is increased with a second voltage difference to continuously charge the battery when the health state value of the battery is less than or equal to the critical health state value.

The invention relates to a controlling device and a controlling method for charging operation of a battery, that is to say, it is a device and method to optimize charging stations of the batteryby adjusting charging capacity of the battery. The method includes reading an actual full charge capacity of the battery and a design capacity of the battery. The actual full charge capacity of the battery is compared with the design capacity of the battery. A charge voltage and a charge current are adjusted if the actual full charge capacity is less than the design capacity. The charge voltage and the charge current in adjusting step is used for controlling the charging operation of the battery. This invention determines the charging station, if the nonce full charge capacity is less than the design capacity, the charging operation of the battery is controlled by the adjusted charge voltage and charge current which are adjusted by decreasing charge current and increasing charge voltage. This invention can properly adjusts the full charge capacity of the battery and increases the charging efficiency.

To provide a positive electrode material mixture for a non-aqueous secondary battery, which is less likely to be gelled and has a good applicability to a current collector, and is capable of producing a battery capable of sufficiently exhibiting practical performance. A positive electrode material mixture which comprises a cathode active material, a binder containing a fluorinated copolymer having polymerized units derived from tetrafluoroethylene and polymerized units derived from propylene, and an aqueous medium, wherein the cathode active material is that the pH of a supernatant obtained by mixing the cathode active material with water is at least 10, and a positive electrode and a secondary battery, obtainable by employing it.

The invention discloses a silicon-carbon composite negative pole material, a preparation method thereof and a lithium ion battery using foamed metal as a negative pole current collector, belonging to the field of the lithium ion battery. The lithium ion battery using foamed metal as a negative pole current collector comprises foamed metal used as the negative pole current collector and the silicon-carbon composite negative pole material; the three-dimensional pore conduction network structure and the high porosity of the foamed metal are beneficial to the contact between silicon active substances and the current collector, and the foamed metal has high adhesion strength, so that the great volume effect of the silicon active substances can be well relieved, and the silicon active substances are not prone to fall in the charging/discharging process, thereby effectively promoting the cycling stability of the silicon-carbon composite negative pole material; the silicon-carbon composite negative pole material of which the general formula is Si-C-X has a disperse carrier and a high-capacity lithium-storing material containing the silicon active substances; and the disperse carrier is a carbon material having stable lithium-storing capacity and reversible lithium intercalation/deintercalation performance, thereby obviously improving the capacity and the rate discharging performance of the lithium ion battery.

The embodiment of the invention provides a signal output circuit, a driving IC, a display device and a driving method thereof, relates to the technical field of display, and can improve the display effect. The signal output circuit comprises a receiving unit and an initial signal output unit; the receiving unit is configured to receive an indication signal indicating an image refresh frequency, wherein the refresh frequency is one of at least two set refresh frequencies; the initial signal output unit is configured to output initial signals in one-to-one correspondence with the refresh frequencies for different refresh frequencies according to the indication signal, wherein the initial signals comprise a pulse in each repetition duration, and the repetition durations of the different initial signals are the same; for different starting signals, the duty ratios of other pulses except the first pulse in each frame of time are the same fixed value; the refresh frequency of the first pulsein each frame of time is inversely proportional to the duty ratio under the condition that the low level is effective, and the refresh frequency is directly proportional to the duty ratio under the condition that the high level is effective.

The invention provides long-acting electret PP non-woven fabric. The long-acting electret PP non-woven fabric is mainly prepared from the following components in parts by weight: 30 to 35 parts of electret master batch, 36 to 44 parts of melt-blown polypropylene, 8 to 17 parts of surface-treated silicon dioxide, 3 to 5 parts of polyvinylidene fluoride, 5 to 7 parts of polytetrafluoroethylene and 3to 5 parts of PFA. According to the long-acting electret PP non-woven fabric and the preparation method thereof provided by the invention, after the non-woven fabric is treated by an electret process, the filtering performance and charge storage performance of fibers are greatly improved, the high temperature resistance and high humidity resistance of the non-woven fabric are effectively improved, meanwhile, the hydrophobic and oleophobic properties of the fibers are also improved, and the service life is prolonged. In addition, the long-acting electret non-woven fabric also has the functionsof antibiosis, disinfection, deodorization and the like.

The invention relates to the field of lithium ion battery material, especially relates to a method for improving storage performance of lithium cobalt oxide at high voltage and high temperature. The traditional two stage method is employed by the invention, and comprises the following steps: adding special additives and controlling high temperature reaction temperature, obtaining lithium cobalt oxide products of particle size which accords with the requirement, doping additives into the lithium cobalt oxide structure, thereby guaranteeing the structure stability of lithium cobalt oxide during excess lithium removing under high voltage. The key step is that the synthesized finished product lithium cobalt oxide which accords with the requirement is used as raw material, a very simple surface treatment is used without high temperature treatment once more, thereby greatly improving high temperature storage performance under high voltage.

The present invention relates to a method for charging an electrical device (102) with a charger (101) via a data interface (103). The data interface (103) comprises at least a first data line (D+) and a second data line (D−) coupling the charger (101) and the electrical device (102). According to the method, the charger (101) and the electrical device (102) are coupled through the first and second data lines (D+, D−). At the charger (101) the first and second data lines (D+, D−) are short-circuited (301). The electrical device (102) detects, if the first and second data lines (D+, D−) are short-circuited and in response to the detected short-circuit (301) at the charger (101), the electrical device (102) short-circuits (401) the first and second data lines (D+, D−). Then, the charger (101) opens the short-circuit (301) of the first and second data lines (D+, D−) and detects, if the first and second data lines (D+, D−) are short-circuited at the electrical device (102). The charger (101) supplies a charging current to at least one of the first and second data lines (D+, D−) in response to the detected short-circuit (401) at the electrical device (102).

The invention relates to a liquid flow energy-storage battery system which consists of a deposition-type zinc negative pole, negative electrolyte, a negative pole storage tank, a positive pole, positive electrolyte, a positive pole storage tank, a liquid pump, a pipeline and a control system. The negative electrolyte is charging state electrolyte and discharging state electrolyte; an acid solution containing zinc ions can be adopted in charging, and an alkaline zincate solution is adopted in discharging; the electrolytes can be sent into the battery from the storage tanks through the pipeline by the liquid pump; and the liquid flow battery system has the advantage that the actual voltage efficiency is more than 100%.

A phosphazene compound and an ionic liquid are added to a non-aqueous electrolyte to provide a less flammable electric double layer capacitor in which decline in storage characteristics under a high temperature and deterioration under a high charging voltage are suppressed.