Abstract: A data communication device includes: a communication execution unit that executes serial communication of an asynchronous type; a bit variance detection block that detects a variance between bits in communication data which the communication execution unit receives from a remote communicating party; a timer that measures a low-level pulse width which is a low-level pulse duration and which is determined with the position of the variance between bits detected by the bit variance detection block; and a control unit that performs transmission speed recognizing processing on the communication data according to the low-level pulse width measured by the timer, wherein based on the confirmation that the low-level pulse width is a low-level pulse width equivalent to a bit width compatible with low-speed communication data, the control unit recognizes the transmission speed for the communication data as a low speed.

Abstract: A battery pack has a charge and discharge count measuring part (131) configured to measure the number of times of charges and discharges of a secondary battery based on the summed value of the charge current for the secondary battery, and a decay rate output part (132) configured to compute a decay rate that indicates a degree of decay of the secondary battery based on the number of times of charges and discharges measured by the charge and discharge count measuring part (131) and to output it to a device being a discharge load. For example, the charge and discharge count measuring part (131) repeatedly sums the detected values of the charge current to a predetermined threshold, and counts up the number of times of charges and discharges every time when the summed value reaches the threshold.

Abstract: A power supply system is provided. The power supply system includes electronic equipment adapted to control power supply based on battery identification information from a battery installed in a battery housing section; and a power supply plate, the power supply plate including a plate main body installed in the battery housing section of the electronic equipment, and a cable, one end of which is connected to the plate main body and the other end of which is led through a lead-out hole of the battery housing section out of the electronic equipment, the other end also having a connector formed thereon which is connected to a power source, wherein power is supplied from the power source connected to the connector of the power supply plate to the electronic equipment.

Abstract: A data communication device includes: a communication execution unit that executes serial communication of an asynchronous type; a bit variance detection block that detects a variance between bits in communication data which the communication execution unit receives from a remote communicating party; a timer that measures a low-level pulse width which is a low-level pulse duration and which is determined with the position of the variance between bits detected by the bit variance detection block; and a control unit that performs transmission speed recognizing processing on the communication data according to the low-level pulse width measured by the timer, wherein based on the confirmation that the low-level pulse width is a low-level pulse width equivalent to a bit width compatible with low-speed communication data, the control unit recognizes the transmission speed for the communication data as a low speed.

Abstract: A battery protection operation having higher safety is performed in a battery pack. Presence/absence of plural abnormal states including at least an overcharge state and an overdischarge state based on detected results of voltage between a positive terminal and a negative terminal of a battery cell as well as an overcurrent charge state and an overcurrent discharge state indicating that charge current and discharge current are excessive respectively based on detected results of charge and discharge current of the battery cell are determined at any time and an abnormality determination flag showing a determination result of respective abnormal states as a flag is stored.

Abstract: A battery pack has a charge and discharge count measuring part (131) configured to measure the number of times of charges and discharges of a secondary battery based on the summed value of the charge current for the secondary battery, and a decay rate output part (132) configured to compute a decay rate that indicates a degree of decay of the secondary battery based on the number of times of charges and discharges measured by the charge and discharge count measuring part (131) and to output it to a device being a discharge load. For example, the charge and discharge count measuring part (131) repeatedly sums the detected values of the charge current to a predetermined threshold, and counts up the number of times of charges and discharges every time when the summed value reaches the threshold.

Abstract: A power supply system is provided. The power supply system includes electronic equipment adapted to control power supply based on battery identification information from a battery installed in a battery housing section; and a power supply plate, the power supply plate including a plate main body installed in the battery housing section of the electronic equipment, and a cable, one end of which is connected to the plate main body and the other end of which is led through a lead-out hole of the battery housing section out of the electronic equipment, the other end also having a connector formed thereon which is connected to a power source, wherein power is supplied from the power source connected to the connector of the power supply plate to the electronic equipment.

Abstract: A battery device includes: a battery cell; a case that accommodates the battery cell; a battery side positive terminal and a battery side negative terminal provided in the case and electrically connected to the battery cell; a battery side communication terminal provided in the case; a battery side communication unit accommodated in the case and communicating with electronic equipment via the battery side communication terminal, the battery side communication unit provided under a changeable communication condition; and a battery side discrimination terminal provided in the case; a battery side control unit accommodated in the case, discriminating a magnitude of a voltage of the battery side discrimination terminal, and changing the communication condition based on a result of the discrimination.