A secondary battery includes: an electrode assembly including a negative electrode tab at a first end and a positive electrode tab at a second end; a case including a pair of first side portions facing each of a pair of long side portions of the electrode assembly, and a pair of second side portions facing each of a pair of short side portions of the electrode assembly, the case being open in directions of the negative electrode tab and the positive electrode tab; and a retainer between at least one of the second side portions and the electrode assembly and including a concave-convex structure.

A battery cassette is disclosed. The battery cassette may include a frame including one or more hollow tubes. The battery cassette may further include a seal component having one or more hollow tubes aligned with the hollow tubes of the frame. The frame and the seal component may be configured to receive one or more battery cells in the hollow tubes.

A battery cassette is disclosed. The battery cassette may include a frame including one or more hollow tubes. The battery cassette may further include a seal component having one or more hollow tubes aligned with the hollow tubes of the frame. The frame and the seal component may be configured to receive one or more battery cells in the hollow tubes.

An electric vehicle (1) has a battery (2) in an underfloor arrangement. The battery (2) is arranged in a battery space (4) that is delimited by body members (5, 6, 7, 8) of a body (3). The battery space (4) also is delimited at a bottom side of the electric vehicle (1) by way of a protective plate (9). The battery (2) has a connection element (10, 11) at least on a side oriented toward one of the body members (7, 8), and the body member (7, 8) has a recess (12, 13) in which the connection element (10, 11) is arranged.

Embodiments include enclosures for protecting electronics such as circuit board and battery assemblies in high-pressure environments. Customized pressure distribution structures are positioned around the electronics. The pressure distribution structures include cavities that are sized to distribute pressure across the electronics in a predetermined manner based on known pressure tolerances of components or portions of the electronics. The pressure distribution structures may include various features such as vias for enhancing thermal conductivity. The enclosure may be sealed and surrounded by an envelope. Methods for manufacturing such enclosures are disclosed.

Embodiments include enclosures for protecting electronics such as circuit board and battery assemblies in high-pressure environments. Customized pressure distribution structures are positioned around the electronics. The pressure distribution structures include cavities that are sized to distribute pressure across the electronics in a predetermined manner based on known pressure tolerances of components or portions of the electronics. The pressure distribution structures may include various features such as vias for enhancing thermal conductivity. The enclosure may be sealed and surrounded by an envelope. Methods for manufacturing such enclosures are disclosed.

A battery pack and an electric vehicle are provided. The battery pack includes a cell array and two first reinforcing plates. The cell array includes a number of cells. Each of the cells is defined with a length L, a thickness D, and a height H between the length L and the thickness D. The number of cells are arranged along a thickness direction, and the cells are adhered to each other by a structural adhesive. The two first reinforcing plates are arranged opposite to each other and are respectively adhered to two surfaces of the cell array along the arrangement direction of the cells, and are configured to constrain relative positions between the cells.

An electric vehicle including a battery assembly with at least two rows of battery cells attached to a battery frame structure. The battery frame structure has a number of accommodating cavities, arranged in a matrix, each battery cell being placed in a respective accommodating cavity and connected to adjacent walls of the respective accommodating cavity via a flowable bonding substance being inserted in a gap between the cells and the walls of the respective cavity.

An electric vehicle including a battery assembly with at least two rows of battery cells attached to a battery frame structure. The battery frame structure has a number of accommodating cavities, arranged in a matrix, each battery cell being placed in a respective accommodating cavity and connected to adjacent walls of the respective accommodating cavity via a flowable bonding substance being inserted in a gap between the cells and the walls of the respective cavity.

A bottom structure for an electric vehicle including at least a first and second beam-shaped battery modules extending in a length direction. Each module is formed by a number interconnected cells and has two longitudinal sides, two transverse sides and a top side covered by a cover plate. The modules are mutually interconnected along their longitudinal sides via an adhesive.