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451results about How to "Increase charging rate" patented technology

Fast charging of battery using adjustable voltage control

A battery cell charger for rapidly charging a lithium ion battery cell (or string of series-parallel connected cells) having a maximum battery cell voltage the battery cell charging system including: a circuit for charging the battery cell using an adjustable voltage charging-profile to apply a charging voltage and a charging current to the battery cell wherein the adjustable voltage charging-profile includes: a first charging stage with a constant first stage charging current and an increasing battery cell voltage with the first stage charging current provided until the first stage charging voltage is about equal to a first stage complete voltage less than the maximum battery cell voltage; one or more intermediate charging stages, each intermediate stage selected from the group consisting of one or more of an intermediate constant voltage stage that provides a decreasing charging current, an intermediate constant current stage that produces an increasing battery cell voltage, and combinations thereof; and a final charging stage with a constant final stage charging voltage about equal to an intermediate stage complete voltage and a decreasing final stage charging current with the final stage charging voltage provided until the final stage charging current reaches a desired charge complete level.
Owner:TESLA INC

Negative electrode material for quickly rechargeable graphite lithium-ion battery and preparation method of negative electrode material

The invention discloses a negative electrode material for a quickly rechargeable graphite lithium-ion battery and a preparation method of the negative electrode material. The preparation method of the negative electrode material for the quickly rechargeable graphite lithium-ion battery comprises the following steps: (1) mixing a mixture containing a graphite precursor and bitumen and heating the mixture for kneading and crushing, wherein the mean grain size D50 of the graphite precursor ranges from 5 to 10 microns, and the mass ratio of the graphite precursor to the bitumen ranges from 50:50 to 90:10; (2) performing heat treatment at a temperature within the range of 300-700 DEG C under the protection of an inert gas; and (3) carrying out graphitizing. The mean grain size D50 of the negative electrode material prepared by use of the preparation method for the quickly rechargeable graphite lithium-ion battery is within the range of 5-15 microns and the specific surface area of the negative electrode material is below 2.0m2 / g; the first discharge capacity of a negative electrode, manufactured by use of the negative electrode material for the quickly rechargeable graphite lithium-ion battery, is more than 355mAh / g, and the initial charge-discharge efficiency of the battery is above 90%; if the battery is quickly charged (1.5C) for 45 minutes, the capacity of the battery can be above 80%; in short, the product is high in discharge capacity and charge / discharge efficiency, and good in rate capability. The invention also relates to a battery comprising the negative electrode material for the quickly rechargeable graphite lithium-ion battery.
Owner:SHANGHAI SHANSHAN TECH CO LTD

Method and system for charge rate adjustment to enhance battery cycle life

ActiveUS20070139008A1Enhances capacity lifeEnhance battery cycle lifeElectric powerBattery load switchingElectric vehicleCharge rate
Methods and systems are disclosed for charge current adjustment to enhance battery cycle life thereby allowing batteries to be charged quickly without accelerating the aging process of the battery. As the charge capacity of the battery degrades over time, the charge current for the battery charging cycles is also reduced so that the effective charge rate for the battery is adjusted to account for the reduction in charge capacity. In this way, battery capacity life is enhanced by avoiding an accelerated charge rate as the battery capacity drops over the operational life of the battery. The methods and systems disclosed are useful for battery-powered information handling systems, as well as other devices where fast charging and long cycle life is desirable, such as cell phones, personal digital assistants (PDAs), electric vehicles and / or any other battery powered devices.
Owner:DELL PROD LP

Fast charging of battery using adjustable voltage control

A battery cell charger for rapidly charging a lithium ion battery cell (or string of series-parallel connected cells) having a maximum battery cell voltage the battery cell charging system including: a circuit for charging the battery cell using an adjustable voltage charging-profile to apply a charging voltage and a charging current to the battery cell wherein the adjustable voltage charging-profile includes: a first charging stage with a constant first stage charging current and an increasing battery cell voltage with the first stage charging current provided until the first stage charging voltage is about equal to a first stage complete voltage less than the maximum battery cell voltage; one or more intermediate charging stages, each intermediate stage selected from the group consisting of one or more of an intermediate constant voltage stage that provides a decreasing charging current, an intermediate constant current stage that produces an increasing battery cell voltage, and combinations thereof; and a final charging stage with a constant final stage charging voltage about equal to an intermediate stage complete voltage and a decreasing final stage charging current with the final stage charging voltage provided until the final stage charging current reaches a desired charge complete level.
Owner:TESLA INC

Driving method and driving circuit for display panel, and display device

InactiveCN106875905AIncrease charging rateSolve the problem of poor screen displayStatic indicating devicesCharge rateEngineering
The invention provides a driving method and a driving circuit for a display panel, and a display device. The display panel comprises Y grid lines. According to the scanning sequence of the grid lines, the Y grid lines are divided into multiple grid line groups. Each grid line group comprises at least one grid line. The driving method comprises steps of determining the i-th grid line to be scanned; adjusting the original charging time of the scanning signal corresponding to the i-th grid line to an adjusted charging time, wherein the adjusted charging line corresponding to each grid line in each grid line group is equal, and in a direction gradually away from the source drive, the adjusted charging time corresponding to each grid line group is gradually increased; and based on the adjusted charging time corresponding to the i-th grid line, outputting the scanning signal corresponding to the i-th grid line to the i-th grid line. The charging time corresponding to each grid line is adjusted, the charging rate of the pixel line with the insufficient charging rate is improved, and the charging rate of each line of pixels is enabled to be equal or close.
Owner:BOE TECH GRP CO LTD +1

Rapidly-charged graphite lithium ion battery anode material and preparation method thereof

The invention discloses a rapidly-charged graphite lithium ion battery anode material and a preparation method thereof. The preparation method for the rapidly-charged graphite lithium ion battery anode material comprises the following steps of: (1) mixing a mixture containing natural graphite and asphalt, and heating, kneading and smashing the mixture, wherein the average grain size D50 of the natural graphite is 5 to 10 micrometers, and the mass rate of the natural graphite to the asphalt is (50:50) to (90:10); (2) carrying out heat treatment at 300-700 DEG C under the protection of an inert gas; and (3) performing graphitizing. The average grain size D50 of the rapidly-charged graphite lithium ion battery anode material prepared according to the method is ranging from 5 micrometers to 15 micrometers, the specific surface area is less than 2.0 m<2>/g, the initial discharging capacity of the battery prepared from the rapidly-charged graphite lithium ion battery anode material is over 360 mAh/g, the initial charging and discharging efficiency is over 90 percent, the charging rate (1.5C) is over 80 percent, and a product is high in discharging capacity and charging and discharging efficiency and good in rate capability. The invention also relates to a battery, and the battery comprises the rapidly-charged graphite lithium ion battery anode material.
Owner:SHANGHAI SHANSHAN TECH CO LTD

Negative electrode material preparation method, negative electrode material, negative electrode piece and lithium ion battery

InactiveCN108063221AAvoid reunionAvoid large specific surface areaCell electrodesSecondary cellsIonCvd graphene
The invention provides a negative electrode material preparation method, a negative electrode material, a negative electrode piece and a lithium ion battery. The negative electrode material preparation method comprises the following steps: mixing and heating a core material and a heteroelement-containing polymer or a heteroelement-containing ionic liquid; mixing and heating the core material coated with the heteroelement-containing polymer or the heteroelement-containing ionic liquid and functionalized graphene; and sintering the functionalized graphene, the heteroelement-containing polymer orthe heteroelement-containing ionic liquid and the core material to obtain the negative electrode material with the surface of the core material being fixedly coated with the graphene by doping carbon. The negative electrode material preparation method allows the negative electrode material with the core material coated with doped carbon fixed graphene to be obtained through fixing graphene by doping carbon, so graphene is stably fixed on the surface of the core material, and graphene agglomeration is avoided.
Owner:HUAWEI TECH CO LTD

Information processing method and device

The invention discloses an information processing method and device. The method is applied to electronic equipment, and comprises the steps of detecting whether the operation that the human body touches the electronic equipment exists or not in the battery charging state of the electronic equipment; setting a provided charging current on the battery of the electronic equipment as a first charging current value when the fact that the human body touches the electronic equipment is detected; setting the provided charging current on the battery of the electronic equipment as a second charging current value when the fact that the human body does not touch the electronic equipment is detected, wherein the second charging current value is bigger than the first charging current value. The method reduces the influences that operation inconvenience is brought to the using of the electronic equipment by the user in the charging process under the condition that small influences are brought to the charging efficiency of the electronic equipment.
Owner:LENOVO (BEIJING) CO LTD

Electrolytes for iron flow battery

ActiveUS20170179516A1Rapidly produceHigh charge rateRegenerative fuel cellsIndirect fuel cellsChemistryIron redox
A method of operating an iron redox flow battery system may comprise fluidly coupling a plating electrode of an iron redox flow battery cell to a plating electrolyte; fluidly coupling a redox electrode of the iron redox flow battery cell to a redox electrolyte; fluidly coupling a ductile plating additive to one or both of the plating electrolyte and the redox electrolyte; and increasing an amount of the ductile plating additive to the plating electrolyte in response to an increase in the plating stress at the plating electrode. In this way, ductile Fe can be plated on the negative electrode, and the performance, reliability and efficiency of the iron redox flow battery can be maintained. In addition, iron can be more rapidly produced and plated at the plating electrode, thereby achieving a higher charging rate for all iron flow batteries.
Owner:ESS TECHNOLOGY
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