An electric work vehicle includes a plurality of battery mounting portions, a plurality of battery packs that can be detachably mounted to the battery mounting portions, a main body contact provided for each one of the battery mounting portions and electrically connected with the battery back mounted to the battery mounting portion, a power feeding circuit to which the main body contact is parallel connected, a battery switch configured to block flow of electric power from the battery pack to the power feeding circuit, a switch operating portion for operating the battery switch, a charged amount estimating portion for estimating a charged power of the battery pack mounted to the battery mounting portion, an electric motor driven by power fed from at least one battery pack via the power feeding circuit, and a driving wheel receiving power transmitted from the electric motor.

There is provided a vehicle rear portion structure that can improve torsional rigidity of a rear body that has side members and a cross member. A bracket has a top wall portion to which an HV (high voltage) battery is fixed. Further, the bracket has a first leg portion, that extends from a front end portion of the top wall portion toward a vehicle lower side and that is fixed to a first rear cross member, and a second leg portion, that extends from a vehicle transverse direction outer side end portion of the top wall portion toward the vehicle lower side and that is fixed to a rear side member.

A frame for an electric vehicle (10) comprising: a head pipe (12) and at least two rear tubes (13) extending rearwardly from the head pipe (12); an electric battery module (24) used as a power source for powering the electric vehicle comprising at least one battery located below rear portion (13B) of said rear tubes (13); a protective frame structure (23) for securely mounting said battery module (24); wherein said protective frame structure (23) is fixed to said rear tubes (13) of said frame and provided substantially centrally and downwardly of said vehicle (10).

A vehicle frame assembly includes a plurality of members, a tray, at least one insulation member, and at least one battery. The plurality of members define a first void. The tray is coupled to at least one member of the plurality of members. The tray defines a second void. The at least one insulation member is disposed within the first void or the second void. The at least one battery is disposed within the first void and the second void.

An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.

A fuel cell vehicle includes: a stack frame providing a fuel cell stack, the stack frame being placed in front of a vehicle cabin; and a fuel tank placed behind the stack frame. The stack frame includes a central member, a right member joined to the central member, a left member joined to the central member, and a front cross member. The front cross member is joined to front edge portions of the central member, the right member, and the left member. A front-end portion of a first joining portion between the central member and the right member and a front-end portion of a second joining portion between the central member and the left member overlap with a third joining portion of the front cross member with the front edge portions of the central member, the right member, and the left member.

An embodiment running bare chassis assembly includes a front frame on which a front suspension is mounted, a rear frame assembly on which a battery carrier is mounted, wherein the rear frame assembly comprises, a first rear frame on which a rear suspension is mounted, a second rear frame coupled to the first rear frame and on which a radiator is mounted, and a battery carrier frame on which the battery carrier is mounted and which is coupled to the first rear frame through a second engagement, and a center frame coupled to the front frame and the rear frame assembly through a first engagement, wherein a stress distribution due to the first engagement is greater than a stress distribution due to the second engagement.

A lithium ion batteries and electric vehicles including lithium ion batteries are provided. An exemplary lithium ion battery includes a cathode including a cathode active material comprising at least 50 wt. %, based on a total weight of the cathode active material, of LiFe.sub.xMn.sub.(1-x)PO.sub.4, wherein X is from 0.01 to 0.5.

A battery pack for a vehicle includes: a case having an air outlet and an air inlet; a battery having a plurality of battery cells and disposed in the case; a first temperature detector for detecting a temperature of the at least one battery cell; a second temperature detector for detecting a temperature of air to be discharged through the air outlet; and a fan inducing a flow of air suctioned through the air inlet to be discharged to the air outlet, and to rotate based on at least one of cell temperature information about the temperature of the at least one battery cell detected by the first temperature detector or discharge temperature information about a discharge air temperature detected by the second temperature detector.

A reinforcing element (10) for a motor vehicle body (1) comprising protection means (30, 31, 40, 41, 42) for protection against an impact at the rear of the vehicle, characterised in that it comprises at least two tubes (20, 22) to be positioned, generally, in the length direction of the vehicle, and a rigid contact surface (30, 31, 70) turned towards the rear, the rigid contact surface (30, 31, 70) and the two tubes (20, 22) being arranged with respect to each other in order to allow the vehicle to move in case of an impact at the rear.