A battery pack for a vehicle electrical system includes a casing for receiving one or more battery modules. The battery modules are insertable into a casing of the battery pack by sliding couplers along pairs of rails and are securable to the ends of the rails. After insertion, the rails thermally insulate one battery module from other battery modules coupled to the casing. In some examples, a first stiffness or a first mechanical frequency of the casing with the one or more battery modules inserted may differ from a second stiffness or a second mechanical frequency associated with a body of a vehicle or another component associated therewith by a threshold amount. Additionally, the casing may be configured with vents for venting the hot gases, such as those generated by a battery module in a thermal runaway event.

A vehicle battery protection structure includes a vehicle frame member, a first duct, and a second duct. The vehicle frame member is disposed in a region including a battery. The vehicle frame member has a through hole. The battery is mountable on a vehicle. The first duct is disposed on an outside of the battery at a location oriented toward an outside of the vehicle. The second duct is inserted through the through hole of the vehicle frame member. The second duct is disposed to overlap the first duct in a vertical direction of the first duct on the outside of the battery at the location oriented toward the outside of the vehicle.

A vehicle lower structure includes a battery pack arranged under a floor panel and having: first and second battery units that are separately arranged from each other on both sides in the vehicle width direction of the propeller shaft; and a battery cover. The battery cover has a first battery accommodation section, a second battery accommodation section, and a coupling section that couples the first and second battery accommodation section and extends in the vehicle width direction. The coupling section includes a fragile section between the first and second battery accommodation sections in the vehicle width direction.

A vehicle lower structure includes: first and second battery units that are arranged under a floor panel and on both sides in a vehicle width direction of a propeller shaft; right and left floor frames disposed on a lower surface side of the floor panel. The floor frame has a front inclined section and a width increased section. The first and second battery units are arranged between the width increased sections 52 of the right and left floor frames. A battery-related electrical component, a width of each of which in the vehicle width direction is less than a width of each of the first and second battery units, is arranged between the front inclined sections.

A midfloor module (10, 11) for a motor vehicle has a frame structure (10) with a battery frame (10). The battery frame (10) has multiple battery modules (11), and multiple tank volumes (1, 2, 2+) that can be used optionally for fuel. A motor vehicle that is equipped with such a midfloor module (10, 11) also is provided as well as a method for manufacturing the midfloor module (10,11).

A body floor (1) for an electric vehicle (2) has a battery frame (3) that receives battery modules (4). An interior cover (5) separates an interior (6) from the battery modules (4). At least one crossmember (7, 8) extends transverse to a vehicle longitudinal direction (9) and is on the battery side of the interior cover (5). A seat attachment (10) for connecting a vehicle seat (11) is arranged on the interior side of the interior cover (5). The battery modules (4) are attached to the crossmember (7, 8) by the battery frame (3), and the body floor (1) is a supporting component of the body structure of a vehicle (2). The seat attachment (10) is attached to the body floor (1) on the battery side of the interior cover (5). With this construction, the vehicle seat is low while simultaneously arranging battery modules below the vehicle seat.

A battery system (20) has first and second battery module assemblies (31, 32), a conduction housing (40), a terminal box (50), and a power electronics housing (60). The first and second battery module assemblies (31, 32) are spaced from one another so that two footwells (35, 36) are formed between the first battery module assembly (31) and the second battery module assembly (32). A first section (42) of the conduction housing (40) extends between the footwells (35, 36). A power electronics (61) is provided in the power electronics housing (60). The terminal box (50) comprises at least a first terminal (51) for a first consumer (91). First conductors (41) are provided in the conduction housing (40) and electrically interconnect the first battery module assembly (31), the second battery module assembly (32), at least a first terminal (51), and the power electronics (61).

To decrease the retraction amount of a traveling motor at front collision. A vehicle-body structure includes a floor panel constituting a floor of an occupant space including a seat on which a passenger sits, a center frame disposed to be higher than and away from the floor panel at a vehicle-width-direction central portion of the occupant space and extending in a vehicle front-rear direction, and a connecting member extending upward from the floor panel, having an upper portion fixed to the center frame, and connecting the center frame to the floor panel. A traveling motor is arranged on a vehicle front side of the connecting member.

To suppress vibration and noise due to load input from a rear suspension device, a left-side load input portion that is fixed to a left-side rear-side frame and to which a load from a rear suspension device is input, and a right-side load input portion that is fixed to a right-side rear-side frame and to which a load from a rear suspension device is input are provided. A cross member is provided at a position lower than the left-side load input portion and the right-side load input portion to which loads from the rear suspension devices are input. The cross member and the left-side load input portion are connected through a left-side rear connection frame. The cross member and the right-side load input portion are connected through a right-side rear connection frame.

To sufficiently improve the distortion stiffness of a vehicle body with minimized influence on comfort in an occupant space. A vehicle-body structure includes a floor panel constituting a floor of an occupant space including a seat on which a passenger sits, and a center frame disposed to be higher than and away from the floor panel at a vehicle-width-direction central portion of the occupant space and extending in a vehicle front-rear direction. The center frame is arranged at a downward tilt toward the vehicle rear side. A rear portion of the center frame is connected to the floor panel.