A lower structure for a vehicle includes a battery unit which is provided under a vehicle body floor, a frame member which extends in a front-rear direction on a vehicle-width-direction outer side of the battery unit, a high-voltage cable which extends forward from a front portion of the battery unit, and a fixing member which fixes a rear portion of the battery unit to the frame member, and the fixing member is configured to be fractured when an inward collision load in a vehicle width direction is input to a position in front of a position of a center of gravity of a first battery unit.

A rear suspension cross member (4) is suspended and supported on a lower side of a floor (2), and a drive unit (8) including a driving motor (9), an inverter (10) and a transaxle (11) is mounted on the rear suspension cross member (4). A power supply unit (20) including a junction box (21), a charger (22) and a DC-AC inverter (23) is mounted on the floor (2), and a terminal block (21a) of the junction box (21) is connected to a terminal block (10a) of the inverter (10) via a motor-side power cable (42). The junction box (21) and the inverter (10) are disposed on opposite sides of each other with respect to a center line (L) in the left-right direction of the vehicle body.

Disclosed is a battery pack fixing system. The battery pack fixing system comprises a locking mechanism (1), wherein the locking mechanism (1) is arranged on the contact surface of a battery pack (2) and a support (3), and the battery pack (2) is unlocked or locked on the support (3) by rotating the locking mechanism (1). According to the battery pack fixing system, the battery pack (2) is unlocked or locked on the support (3) by using the rotation movement of the locking mechanism (1) in different directions, so that the objective of fixing the battery pack (2) on the support (3) is achieved; and compared with a traditional locking mechanism, the battery pack fixing system has advantages such as being firmer in fixing and highly reliable. Further disclosed are a mounting method and a dismounting method for the battery pack.

A battery pack and a vehicle are provided. The battery pack is fixed to the vehicle and is configured to provide electric energy for the vehicle. The battery pack includes a cell array. The cell array includes at least one cell. The cell includes electrode terminals for leading out current. A first direction is defined as a front-to-rear direction of the vehicle. The electrode terminals are oriented parallel to the first direction.

An electric vehicle may include: a body comprising a compartment on a front side of a cabin; a component frame located in the compartment, and connected to the body; and a circuit case located on the component frame, comprising therein a control circuit configured to control a traction motor, and constituted of metal. The component frame may comprise: a plurality of crossmembers extending along a vehicle left-right direction; and a connection member connecting the plurality of crossmembers to each other. The plurality of crossmembers may comprise a rear crossmember which is a rearmost crossmember of the plurality of crossmembers. The circuit case may be on the front side of a rear end of the rear crossmember in a top view.

A vehicle-body structure both protects a battery and provides a routing member below a floor panel that improves underfloor aerodynamic performance. Embodiments of a vehicle-body structure may include: a routing member that extends in a vehicle front-rear direction on a vehicle-width-direction outer side of a battery frame below a floor panel; a cover member that extends from a lower side of a battery to a lower side of the routing member; battery-frame fixation portions that fix the battery frame to side sills; and cover-member fixation portions that fix a vehicle-width-direction end portion of the cover member to the side sills. The routing member and the battery-frame fixation portions may be positioned on a vehicle-width-direction inner side of the cover-member fixation portions.

A vehicle-body structure increases comfort inside a vehicle cabin and improves vehicle-body stiffness. A battery housing portion in which a battery is housed and a battery non-housing portion in which the battery is not housed are provided alongside in a vehicle front-rear direction below the vehicle cabin. A second frame portion disposed at the battery non-housing portion is larger than a first frame portion disposed at the battery housing portion in a vehicle width direction.

In an electric work vehicle, a power feeding assembly which connects a battery device to a power controller unit so as to feed power includes a fixed connector which is fixed to the battery device and electrically connected to the battery device, a cable harness connected to a power controller unit, and a free connector which is connected to an end of the cable harness and connectable to a fixed connector, and a connecting operation tool is configured to be movable the free connector between the connecting position in which the free connector is connected to the fixed connector and the detaching position.

A battery unit for a vehicle is provided. The battery unit includes a lower case having two battery compartments arranged in a direction toward opposite sides of the vehicle, respectively, and a connecting portion bent to be convex upwardly between the two battery compartments. A reinforcing structure is disposed on the connecting portion. Two battery modules are installed in the two battery compartments, respectively and a power wire is electrically connected to at least one of the two battery modules and extends from one of the two battery compartments to the other one of the two battery compartments through the connecting portion.

A drive unit includes an internal combustion engine (21) disposed in an engine compartment (10), a first electric motor (31) and a second electric motor (33), and an inverter (27) disposed above an electromotive unit (23). The drive unit has: a first harness (41) that connects the inverter and the first electric motor; a second harness (42) that connects the inverter and the second electric motor; a step portion (51) formed so as to be recessed on one side or the other side, in the left-right direction, of the upper end of the inverter; and an AC terminal block (55) disposed in the step portion. The first harness and the second harness respectively extend downward from the DC terminal block while extending outward, and are respectively connected to upper parts of the first electric motor and the second electric motor.