257results about How to "Reduce charging current" patented technology

The invention discloses an Li traction battery series parallel change-over charging method and a charging device. The charging device comprises a power main loop comprising a rectifier circuit, a DC filtering capacitor, a pre-charging circuit, a voltage sensor, a switch bridge circuit, a charging current sensor and a series parallel change-over switch, a control circuit board comprising a parallel branch signal unit, a switch signal drive control unit, a coil signal circuit, a voltage current signal circuit, a control processor and a signal display unit, a serial charging circuit comprising a filter inductor, a filter capacitor and an output voltage sensor, and a parallel charging circuit comprising a primary coil, a feedback coil, an iron core, a plurality of secondary coils of a multi-winding transformer and a plurality of series parallel charging unit. The pre-charging, serial charging and parallel charging are carried out by the charging method according to a set pre-charging voltage value and an end voltage value. The method and the device provided by the invention reduce the cost and volume of charging devices, maintain the balance of charging capacity of every Li traction battery electrical core, ensure adequate protection and best working status for each battery unit and improve safety and service life cycle of Li traction battery.

A battery cell charging system, including a charger and a controller, for low-temperature (below about zero degrees Celsius) charging a lithium ion battery cell, the battery cell charging system includes: 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 having: a non-low-temperature charging stage for charging the battery cell using a charging profile adapted for battery cell temperatures above about zero degrees Celsius; and a low-temperature charging stage with a variable low-temperature stage charging current that decreases responsive to a battery cell temperature falling below zero degrees Celsius.

A charging cable A for use in charging a battery of an electrically-driven vehicle includes a power plug 14 to be detachably connected to a receptacle outlet 12 of a commercially available power source, a charging coupler 16 to be detachably connected to the electrically-driven vehicle C, a temperature sensor 14a for detecting a temperature of an electric circuit between the power plug 14 and the charging coupler 16, and a charging device 20 having a controller 20a for controlling a current value that flows from the power plug 14 to the charging coupler 16. This configuration can minimize the charging time and enhance the durability between the charging cable and the receptacle outlet and between the charging cable and the charging coupler.

A disclosed battery charger comprises multiple interfaces provided corresponding to multiple mobile devices, the interfaces being connected to the mobile devices in wired or wireless connection; a charge parameter setting unit setting one or more charge parameters for the mobile devices; a switching control unit switching timing of charging the multiple mobile devices based on the charge parameters set by the charge parameter setting unit; and a charging unit charging one of the mobile devices selected by the switching control unit.

The invention provides a charge control method of a rechargeable battery and a portable computer. The charge control method comprises the following steps: acquiring charge current control parameters of the rechargeable battery; modifying a first charge current of the charge current of the rechargeable battery into a second charge current, wherein the second charge current is less than the first charge current; and using the second charge current to charge the rechargeable battery. The charge control method is used to change the existing mode that the battery is charged by the maximal current, thus improving the service life of the rechargeable battery.

When charging of a secondary battery is started, a power source section for supplying an electric current for charging the secondary battery gradually increases the supply amount of the current. If the charging current has reached a predetermined first threshold current, the power source section is operative to set the supply amount of the current to a predetermined constant current for a constant current charging. If a terminal voltage of the secondary battery has reached a predetermined threshold voltage, the power source section is operative to supply a predetermined voltage for a constant voltage charging to the secondary battery.

The invention discloses a system and a method for reducing a heating value in mobile terminal charging. The method includes the steps that A, a clock management module sends temperature detection signals every other cycle, and a central processing unit (CPU) carries out temperature detection according to the temperature detection signals; B, an obtained temperature value is compared with an over-temperature threshold value of a battery and a power management chip in a memorizer by the CPU, and if the temperature value exceeds the over-temperature threshold value, charging currents are reduced; and C, the CPU detects the temperature of the battery and the power management chip after a cycle interval through a microprocessor, and if the temperature exceeds the over-temperature threshold value, the power management chip is controlled through the microprocessor to close a charging function. According to the system and the method, the heating value of a mobile phone in the charging process can be reduced, if the heating value of the mobile phone reaches the threshold value, the current value of constant current charging is halved, and if the temperature is not reduced below a prewarning value yet, the charging function is closed. Until the temperature of the mobile phone returns to be in a normal temperature, the charging function is opened again. According to the system and the method, not only is the temperature of the mobile phone in the charging process is reduced, but also safety of the mobile phone in the charging process is further improved.

The present disclosure discloses a charging control method and device and an charging system for an electric vehicle. A method applied to a gun-shaped charging coupler comprises: detecting a press state of a latch button of the gun-shaped charging coupler; and sending a control signal to a charging pile connected with the gun-shaped charging coupler according to a detection result, the control signal being used for allowing the charging pile to obtain a charging control strategy, and controlling the charging pile to execute an operation corresponding to the charging control strategy. In such a way, when an electric vehicle is charged, the safety in the charging process can be improved with prolonging of the service lives of the gun-shaped charging coupler and a charging outlet and protection on the safety of people.

The invention provides storage equipment and a standby battery charging method and control device therefor. The method comprises the steps: judging whether the cell temperature sampling value of a standby battery is greater than a preset threshold value or not when the standby battery is in a charging state; controlling a cooling fan of the standby battery to increase the rotating speed when the cell temperature sampling value of the standby battery is greater than the preset threshold value, so as to reduce the environment temperature of the standby battery, thereby enabling the standby battery to dissipate heat in a better way, and reducing the cell temperature. Meanwhile, through judging whether the time when the cell temperature sampling value is greater than the preset threshold value is greater than a preset time duration or not, the method obtains a control effect of reducing the cell temperature through reducing the environment temperature. If the time when the cell temperature sampling value is greater than the preset threshold value is greater than the preset time duration, it indicates that the heat dissipation capability of the external environment cannot effectively achieve the control of the cell temperature, and the charging current of the standby battery is controlled to be reduced at this moment, so as to reduce the cell temperature, and prevent the overheating of a cell from affecting the service life of the standby battery.

A charge equalizer for a string of series-connected batteries includes a shunt path for each of the batteries. The equalizer measures the voltage of each of the batteries of the string and then closes a switch in the shunt path associated with the highest voltage battery for a predetermined time. Then the switches of all of the shunt paths are opened and the cycle repeats. In this way, charging is equalized in the batteries of the string, regardless of whether or not any of the batteries of the string is in an over charged condition.