Battery pack and electric vehicle

An electric vehicle, comprising a vehicle body and a battery pack, wherein

• the battery pack comprises a housing and multiple electrode core strings electrically connected to each other and disposed in the housing;
• the housing comprises a housing body, the housing body comprises multiple sub-housings connected to each other, and at least one of the sub-housings comprises at least one reinforcing plate;
• each of the sub-housings comprises a top plate and a bottom plate oppositely arranged in a first direction, the first direction is a height direction of the housing, the at least one reinforcing plate is arranged between the top plate and the bottom plate, the at least one reinforcing plate is connected to the top plate and the bottom plate and divides an interior of a corresponding sub-housing into multiple accommodating cavities, and at least one of the accommodating cavities comprises at least one of the electrode core strings;
• each of the electrode core strings comprises multiple electrode core assemblies connected and arranged in a second direction, the electrode core assemblies are disposed in an encapsulation film, a length of the electrode core string extends in the second direction, and the second direction is a length direction of the housing or a width direction of the housing;
• the housing comprises a first edge beam and a second edge beam disposed on two opposite sides of the housing body along a third direction, and a mounting component disposed outside the housing body and configured to be connected and fixed to an external structure, wherein each of the first edge beam and the second edge beam comprises a cavity, and the cavity is divided into multiple sub-cavities by at least one partition plate;
• and
• the battery pack is fixed to the vehicle body through the mounting component.