Abstract: An activation system of a work machine includes a vehicle body control unit outputting a control signal to drive a vehicle body of the work machine with power supplied by a power source, and an authentication unit performing authentication of an operator of the work machine. The activation system of a work machine first activates the authentication unit, and activates the vehicle body control unit when the authentication unit authenticates that the operator boarding the work machine is a specific operator.

Abstract: A work machine start-up system includes a control unit configured to control a work machine, a proximity detection unit configured to detect that a specific operator is in close proximity to the work machine, and a start-up unit configured to start at least part of the control unit when it is detected that the specific operator is in close proximity to the work machine.

Abstract: An authentication unit performs authentication of an operator. A storage unit stores setting data associated with a plurality of operators. A vehicle body control unit outputs a control signal to drive a vehicle body of the work machine with power supplied by a power source, based on the setting data associated with the authenticated operator. The authentication unit receives the authentication when the power source is stopped and does not receive the authentication when the power source is driven.

Abstract: A battery pack includes a first battery module, a first battery case accommodating the first battery module, a second battery module, and a second battery case placed on an upper side of the first battery case so as to overlap each other and accommodating the second battery module. The second battery module is fixed to a fastening portion formed on a bottom surface of the second battery case and bulging downward. A hole portion for accommodating the fastening portion is provided on an upper surface of the first battery case at a position overlapping the fastening portion when viewed from above.

Abstract: A battery pack includes a first battery case accommodating a plurality of cells, and a second battery case laminated above the first battery case and accommodating a plurality of cells. The first battery case has a first through-hole on an upper surface. The second battery case has a second through-hole on a bottom surface which communicates with the first through-hole. The battery pack includes a communication port composed of the first through-hole and the second through-hole, a gas discharge valve which is provided only in either the first battery case or the second battery case and opens when internal pressure of the battery pack is higher than a predetermined value, and a temperature sensor provided on a gas flow path connected to the gas discharge valve.

Abstract: A battery pack includes a first battery case accommodating a plurality of cells, and a second battery case laminated above the first battery case and accommodating a plurality of cells. The first battery case has a first through-hole on an upper surface. The second battery case has a second through-hole on a bottom surface which communicates with the first through-hole. The battery pack includes a communication port composed of the first through-hole and the second through-hole, a gas discharge valve which is provided only in either the first battery case or the second battery case and opens when internal pressure of the battery pack is higher than a predetermined value, and a temperature sensor provided on a gas flow path connected to the gas discharge valve.

Abstract: A battery pack includes a first battery module, a first battery case accommodating the first battery module, a second battery module, and a second battery case placed on an upper side of the first battery case so as to overlap each other and accommodating the second battery module. The second battery module is fixed to a fastening portion formed on a bottom surface of the second battery case and bulging downward. A hole portion for accommodating the fastening portion is provided on an upper surface of the first battery case at a position overlapping the fastening portion when viewed from above.

Abstract: A vehicle power supply system includes: a battery module; a cooling fan configured to taken in air from a passenger compartment of a vehicle; an upstream-side inlet duct that is disposed on an upstream side of the cooling fan; and a downstream-side inlet duct that is disposed on a downstream side of the cooling fan to connect the cooling fan and the battery module together. The cooling fan is disposed obliquely forwards or obliquely rearwards of the battery module, the downstream-side inlet duct is disposed on a lateral side of the battery module, the downstream-side inlet duct has a branching portion configured to divide air discharged from a discharge port of the cooling fan and to supply the air to the battery module, the branching portion is disposed between the cooling fan and the battery module, and the discharge port is directed towards the battery module.

Abstract: A battery cooling structure for a vehicle includes: a battery storage space that is defined underneath a luggage compartment provided behind a rear seat and covered by a rear floor; a battery module that is stored in the battery storage space; a battery cooling unit that cools the battery module using air taken in from a passenger compartment, and discharges air into the battery storage space; a partition member that separates the battery storage space and a rear seat underside space that is provided underneath the rear seat; a passenger compartment-bound exhaust air flow path that returns an exhaust air discharged into the battery storage space to the passenger compartment by way of the rear seat underside space and an exhaust air passage hole formed in the partition member; and a luggage compartment-bound exhaust air flow path that discharges the exhaust air into the luggage compartment.

Abstract: A battery cooling structure for a vehicle includes: a battery storage space that is defined underneath a luggage compartment provided behind a rear seat and covered by a rear floor; a battery module that is stored in the battery storage space; a battery cooling unit that cools the battery module using air taken in from a passenger compartment, and discharges air into the battery storage space; a partition member that separates the battery storage space and a rear seat underside space that is provided underneath the rear seat; a passenger compartment-bound exhaust air flow path that returns an exhaust air discharged into the battery storage space to the passenger compartment by way of the rear seat underside space and an exhaust air passage hole formed in the partition member; and a luggage compartment-bound exhaust air flow path that discharges the exhaust air into the luggage compartment.

Abstract: A vehicle power supply system includes: a battery module; a cooling fan configured to taken in air from a passenger compartment of a vehicle; an upstream-side inlet duct that is disposed on an upstream side of the cooling fan; and a downstream-side inlet duct that is disposed on a downstream side of the cooling fan to connect the cooling fan and the battery module together. The cooling fan is disposed obliquely forwards or obliquely rearwards of the battery module, the downstream-side inlet duct is disposed on a lateral side of the battery module, the downstream-side inlet duct has a branching portion configured to divide air discharged from a discharge port of the cooling fan and to supply the air to the battery module, the branching portion is disposed between the cooling fan and the battery module, and the discharge port is directed towards the battery module.