Abstract: Provided is a laser oscillator including: anti-surge capacitor (44) that is connected in parallel with bypass switch (43) between first and second nodes (N1), (N2); first diode (45) that is connected in parallel with light emission circuit (42) and bypass switch (43) and in series with anti-surge capacitor (44) on a side close to first node (N1), and that rectifies a current to allow the current to flow in a direction from first node (N1) toward anti-surge capacitor (44); and current supply circuit (60) that supplies the current to light emission circuit (42) using electrostatic energy stored in anti-surge capacitor (44).

Abstract: A control unit performs stop control of causing a power supply circuit to stop supplying the supply current, if a supply current is determined to exceed a predetermined threshold, determines whether an input AC voltage is abnormal, with supply of the supply current to the power supply circuit stopped by the stop control, and causes the power supply circuit to resume supplying the supply current, if the input AC voltage is determined not to be abnormal.

Abstract: In impact detection device to be mounted on power storage pack, an impact detection circuit compares detection values of three axes output from a three-axis accelerometer sensor with thresholds set to different values according to mechanical characteristics of power storage pack, and detects an impact outside an allowable range. For example, power storage pack includes wound cylindrical cells, and a threshold of an axis in a direction along a winding axis may be set to a value smaller in absolute value than thresholds of other two axes.

Abstract: A cell voltage measurement unit measures a voltage of each of a plurality of cells that are series-connected. A total voltage measurement unit measures a total voltage of the plurality of cells. A controller manages an internal impedance of each of the plurality of cells. The controller detects a ripple of the total voltage measured by the total voltage measurement unit, estimates a ripple of each cell voltage by multiplying the detected ripple of the total voltage by a ratio of the internal impedance of each cell to a resultant internal impedance of the plurality of cells, and determines whether the ripple of each cell voltage is within an allowable voltage range.

Abstract: In a power storage system, each of a plurality of power storage modules includes at least one cell, and the plurality of power storage modules are connected in series. A management device manages the plurality of power storage modules. Each of the plurality of power storage modules contains a first insulation unit having a primary side and a secondary side that are insulated from each other. The first insulation unit outputs a signal containing information of at least one cell to a communication line. The signal is referenced to predetermined standard voltage between a voltage at one end and a voltage at the other end of the plurality of power storage modules. The management device contains a second insulation unit having a primary side and a secondary side that are insulated from each other, and a circuit unit insulated from the communication line by the second insulation unit.

Abstract: A plurality of controlling circuits control a plurality of respective shutdown switches to turn ON/OFF. A first signal system transmits, in a direction from one end of the plurality of controlling circuits to the other end of the plurality of controlling circuits, a significant signal during a normal operation and a non-significant signal when the operation needs to be stopped. The second signal system transmits, in a direction from the other end of the plurality of controlling circuits to the one end of the plurality of controlling circuits, a significant signal during the normal operation and a non-significant signal when the operation needs to be stopped. The other end of the plurality of controlling circuits transmits the non-significant signal through second signal system when a signal received through first signal system is the non-significant signal.

Abstract: A cell voltage measurement unit measures a voltage of each of a plurality of cells that are series-connected. A total voltage measurement unit measures a total voltage of the plurality of cells. A controller manages an internal impedance of each of the plurality of cells. The controller detects a ripple of the total voltage measured by the total voltage measurement unit, estimates a ripple of each cell voltage by multiplying the detected ripple of the total voltage by a ratio of the internal impedance of each cell to a resultant internal impedance of the plurality of cells, and determines whether the ripple of each cell voltage is within an allowable voltage range.

Abstract: In each of battery modules (120) of a battery block (100) configuring a battery management system (10), a first insulating device having a first insulation distance is disposed between a first region (132) in which a battery side controller (146) is installed and a second region (134) in which a first communication unit (150) is installed. In a control device (200) coupled to the battery block (100) with a communication line, a second insulating device (234) having a second insulation distance is disposed between a relay region (222) and a third region (220) in which a second communication unit is installed, and a third insulating device (236) having a third insulation distance is disposed between the relay region (222) and a fourth region (224) in which a control controller unit (238) is installed.

Abstract: A battery management system includes a circuit board having a first region provided with a voltage measuring unit, a second region provided with a controller, a relay region that is disposed at a first insulation distance from the first region and at a second insulation distance from the second region, and a third region provided with an interface connecting unit. The third region is disposed at a third insulation distance from the second region. The third insulation distance is shorter than each of the first and the second insulation distances. The battery management system further includes a first insulating device connecting between the first region and the relay region, a second insulating device connecting between the relay region and the second region, and a third insulating device connecting between the second region and the third region.

Abstract: A plurality of controlling circuits control a plurality of respective shutdown switches to turn ON/OFF. A first signal system transmits, in a direction from one end of the plurality of controlling circuits to the other end of the plurality of controlling circuits, a significant signal during a normal operation and a non-significant signal when the operation needs to be stopped. The second signal system transmits, in a direction from the other end of the plurality of controlling circuits to the one end of the plurality of controlling circuits, a significant signal during the normal operation and a non-significant signal when the operation needs to be stopped. The other end of the plurality of controlling circuits transmits the non-significant signal through second signal system when a signal received through first signal system is the non-significant signal.

Abstract: In a power storage system, each of a plurality of power storage modules includes at least one cell, and the plurality of power storage modules are connected in series. A management device manages the plurality of power storage modules. Each of the plurality of power storage modules contains a first insulation unit having a primary side and a secondary side that are insulated from each other. The first insulation unit outputs a signal containing information of at least one cell to a communication line. The signal is referenced to predetermined standard voltage between a voltage at one end and a voltage at the other end of the plurality of power storage modules. The management device contains a second insulation unit having a primary side and a secondary side that are insulated from each other, and a circuit unit insulated from the communication line by the second insulation unit.

Abstract: An abnormality notification switch is switched on when a power storage module is abnormal but is switched off when the power storage module is normal. A first detection element outputs a signal indicating an abnormality of the power storage module when detecting that an electric current flows along an electric current line. A second detection element is inserted into an electric current line between a node and a second high-side reference potential that has a higher potential than a potential of a first high-side reference potential. The second detection element outputs a signal indicating an occurrence of a disconnection when detecting that no electric current flows along this electric current line. A retaining circuit retains a potential at the node higher than the first high-side reference potential and lower than the second high-side reference potential.

Abstract: In each of battery modules (120) of a battery block (100) configuring a battery management system (10), a first insulating device having a first insulation distance is disposed between a first region (132) in which a battery side controller (146) is installed and a second region (134) in which a first communication unit (150) is installed. In a control device (200) coupled to the battery block (100) with a communication line, a second insulating device (234) having a second insulation distance is disposed between a relay region (222) and a third region (220) in which a second communication unit is installed, and a third insulating device (236) having a third insulation distance is disposed between the relay region (222) and a fourth region (224) in which a control controller unit (238) is installed.

Abstract: In an electric device housing rack, cooling air drawn in by an air inlet from outside of a casing is guided to a first housing and a second housing by a flow divider, and then the cooling air passes through a ventilation opening and inside of a secondary battery module via a heat vent, whereby the secondary battery module is cooled.

Abstract: An abnormality notification switch is switched on when a power storage module is abnormal but is switched off when the power storage module is normal. A first detection element outputs a signal indicating an abnormality of the power storage module when detecting that an electric current flows along an electric current line. A second detection element is inserted into an electric current line between a node and a second high-side reference potential that has a higher potential than a potential of a first high-side reference potential. The second detection element outputs a signal indicating an occurrence of a disconnection when detecting that no electric current flows along this electric current line. A retaining circuit retains a potential at the node higher than the first high-side reference potential and lower than the second high-side reference potential.

Abstract: A battery management system includes a circuit board having a first region provided with a voltage measuring unit, a second region provided with a controller, a relay region that is disposed at a first insulation distance from the first region and at a second insulation distance from the second region, and a third region provided with an interface connecting unit. The third region is disposed at a third insulation distance from the second region. The third insulation distance is shorter than each of the first and the second insulation distances. The battery management system further includes a first insulating device connecting between the fist region and the relay region, a second insulating device connecting between the relay region and the second region, and a third insulating device connecting between the second region and the third region.

Abstract: In an electric device housing rack, cooling air drawn in by an air inlet from outside of a casing is guided to a first housing and a second housing by a flow divider, and then the cooling air passes through a ventilation opening and inside of a secondary battery module via a heat vent, whereby the secondary battery module is cooled.