Abstract:
PROBLEM TO BE SOLVED: To enable efficient charging of a secondary battery. SOLUTION: A charging current controller 11 selectively inputs power from a first external power source 16 or a second external power source 18 and outputs a part of the power to a charger 22 for charging a battery 23. A reference value supplying means gives a first reference value which corresponds to the capacity of the first source 16, when the charging controller 11 is connected to the first source 16 and gives a second reference value which corresponds to the capacity of the second source 18, when the charging controller 11 is connected to the second source 18. A current detector 13 detects a current, which the charging controller 11 receives from the first source 16 or a second source 18. A charging current control circuit 15 controls the charging current of the charger 22, so as not to exceed the first or second reference value detected by the current detector 13.
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply unit having an internal AC adaptor on which an exterior AC adaptor is also mounted and portable electronic equipment. SOLUTION: Each DC output of an exterior AC adaptor 10 and an internal AC adapter 20 is transmitted to a DC/DC converter 30 through its own output line. A power supply switching circuit 50 which performs connection/interruption is arranged on the output line on the exterior AC converter. The adaptor 20 includes an AC power supply input detecting means which notifies an electronic equipment body side whether the adaptor 20 itself has an external AC input and asserts a detection signal when the external AC input exists. In the electronic equipment, the circuit 50 interrupts the output line on the exterior AC adaptor side in response to it. On the other hand, when the external AC input does not exist; a detection signal is negated and the output line on the exterior AC adaptor side is connected in response to it.
Abstract:
PROBLEM TO BE SOLVED: To detect a wireless access point from a mobile computer such as a note PC, a PDA and the like without using a special device for detecting access points. SOLUTION: The card for wireless network communication includes an access point detecting circuit which detects wireless access points via a wireless antenna. The access point detecting circuit is provided with an electric power inflow path which supplies electric power in response to a request for access point detection from a user, when the power of a device is off or suspended to which the card for wireless network communication is attached. The card for communication allows the access point detecting circuit to operate in response to power supply from the electric power inflow path. When the access point detecting circuit detects a wireless access point in response to the instruction, access point detection signals are transmitted to a detection indicator or a detection voice output device. In this way, wireless access points can be detected without starting up the above device. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent a phenomenon that only a specific battery or battery block deteriorates in an electrical apparatus with which a plurality of battery blocks or a plurality of batteries can be connected. SOLUTION: A hybrid battery 100 so constructed that it can be connected to the main unit of an electrical apparatus that consumes power comprises cell block A 101 and cell block B 111. The cell block A comprises one or more battery cells and is discharged after charging and thereby supplies power to the main unit of the electrical apparatus. The cell block B comprises one or more battery cells and is discharged after charging and thereby supplies power to the main unit of the electrical apparatus. The cell block B and the cell block A is alternatively made active. A cell block to be made active is selected by a CPU 120 based on the number of charging/discharging cycles of the cell block A 101 and the number of charging/discharging cycles of the cell block B 111. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To properly guide a user who is using an electrical appliance to effectively use the result of a battery diagnosis or the like. SOLUTION: This system is provided with: a notebook-sized PC (notebook- sized personal computer) 10 connected to a network 20 and equipped with a battery for supplying power to the main body by performing battery charging/ discharging; and a management server 30 connected to the network 20 for diagnosing the battery of the notebook-sized PC 10. This notebook-sized PC 10 accesses a Web page provided by the management server 30 through the network 20 by using a browser, designates a URL in an HTML document transmitted from the management server 30, and transmits the information file of the battery to the management server 30. Then, the management server 30 reads the information file, analyzes the information of the battery, determines whether a security period has expired, and transmits the analysis result to the notebook-sized PC 10. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a voltage converter that can reduce the circuit area by incorporating a protection circuit to a switching element where high-speed switching is a requirement so as to solve a problem of the layout of the protection circuit. SOLUTION: The voltage converter that converts an input voltage (Vin) 11 into an output voltage (Vout) 18, is provided with a 1st FET (FET 1) 21 that applies ON/OFF switching to the input voltage (Vin) 11 to provide an output of a voltage, a 2nd FET (FET 2) 14 that provides an output of a voltage for a period when the 1st FET (FET 1) 21 is turned off, a PWM controller 15 that controls the switching operation of the 1st FET (FET 1) 21 and the 2nd FET (FET 2) 14, and the protection circuit 30 that receives its operating power from a drain terminal 22 of the 1st FET (FET 1) 21 and short-circuits a gate terminal 23 and a source terminal 24 of the 1st FET (FET 1) 21 when the temperature of the 1st FET (FET 1) 21 and the 2nd FET (FET 2) 14 reaches a prescribed temperature or over.
Abstract:
PROBLEM TO BE SOLVED: To detect a generation of a memory effect more accurately, while making a secondary cell operate as usual. SOLUTION: It is so regarded that a memory effect is generated, when a cell voltage during discharge is measured and the fact that the cell voltage is too low against the charging current, is detected. The electric power supply device comprises an intelligent cell 12 supplying electric power to a main body circuit, a current measuring circuit 30 measuring a current during discharge, a voltage measuring circuit 40 measuring a voltage during discharge, and a controller 15 detecting the generation of memory effect by judging whether the voltage during discharge measured against the current during discharge when the detected cell capacity is lower than the prescribed capacity, is lower than the prescribed voltage or not.
Abstract:
PROBLEM TO BE SOLVED: To obtain a power source device, a power source capacity information correction device and a power source capacity information correction method, that can precisely correct the capacity information and to obtain a computer that can precisely correct the capacity information of the built-in power source. SOLUTION: The computer comprises a memory 104, equipped in the main battery 64A of the power source storing the capacity of the battery 106 and the total capacity against the cycle number of the battery 106, and as a correction information to correct the above capacity information. A CPU 102 detects the cycle number of the battery 106, based on the accumulated value of the charged amount of the battery 106. By obtaining the total capacity against the cycle number from this correction information, the capacity information is corrected based on the total capacity obtained.
Abstract:
PROBLEM TO BE SOLVED: To obtain a power supply device, a power supply-switching device, and a computer for reducing power loss and at the same time costs. SOLUTION: The number of FETs for switching a power supply that are provided in an internal circuit 120 is reduced by using FETs that are in protection circuits 110A and 110B being provided at a main battery 64A and a second battery 64B and are not shown in a figure as FETs for switching a power supply that switch a power supply path to a DC-DC converter 66 from the main battery 64A and the second battery 64B.
Abstract:
PROBLEM TO BE SOLVED: To obtain a method which controls the discharging operation and the charging operation of a plurality of secondary batteries and in which the batteries can be charged in a short time and with good efficiency. SOLUTION: When a discharging operation is started, a plurality of secondary batteries are parallel-discharged without fail (Step 11). Consequently, all of the plurality of secondary batteries at the start of a charging operation have free capacities. By the free capacities, the parallel charging operation of the plurality of secondary batteries is realized without fail. As a result, the plurality of secondary batteries can he charged in a short time and with good efficiency.