System, methods, and other embodiments described herein relate to determining an improved electrode design of a battery. In one embodiment, a method includes computing one or more equivalent circuits as porous electrode transmission line models corresponding to one or more electrode designs. Individual circuits of the equivalent circuits define an arrangement of electrode elements having at least two geometric degrees of freedom. The electrode designs are defined according to battery specifications indicating at least a battery volume, and a separator thickness. The method includes determining attributes for the equivalent circuits according to the at least the two geometric degrees of freedom in which the equivalent circuits are defined. The method includes identifying a target design of the electrode designs associated with one of or more of the attributes satisfying a circuit threshold. The target design improves one or more of the attributes in relation to the battery.

A vehicle battery pack case includes a battery bolt provided on a lateral side of a vehicle frame; a first nut provided outside the battery bolt, externally and internally formed with an internal screw thread and an external screw thread, of which tightening directions are opposite to each other, and tightened to the battery bolt through the internal screw thread; and a second nut provided outside the battery bolt and the first nut, and tightened to the first nut through the external screw thread formed on the first nut.

A vehicle battery pack case includes a battery bolt provided on a lateral side of a vehicle frame; a first nut provided outside the battery bolt, externally and internally formed with an internal screw thread and an external screw thread, of which tightening directions are opposite to each other, and tightened to the battery bolt through the internal screw thread; and a second nut provided outside the battery bolt and the first nut, and tightened to the first nut through the external screw thread formed on the first nut.

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.

A battery module includes a plurality of battery cells having electrode terminals respectively at one end and the other end thereof and having a vent unit opened to discharge gas to the outside when an internal pressure increases over a predetermined level; a cell frame having an accommodation space for accommodating the plurality of battery cells and have a plurality of exposure holes opened so that the gas discharged from the battery cell moves to the outside; a screen member fixed to the cell frame to seal the exposure hole and configured to open a region thereof corresponding to the exposure hole by a gas pressure when gas is discharged from the vent unit of the battery cell; and a protection plate configured to fix the screen member to the cell frame and have a plurality of communication holes located corresponding to the exposure holes.

A power storage device includes: a first case that accommodates a plurality of stacked first power storage cells: and a second case that accommodates a plurality of stacked second power storage cells. The first case has a first reinforcement portion extending in a first direction, and the second case has a second reinforcement portion extending in a second direction intersecting the first direction. The first case and the second case are provided to overlap with each other along a third direction intersecting the first direction and the second direction, and are joined to each other.

A power storage device includes: a first case that accommodates a plurality of stacked first power storage cells: and a second case that accommodates a plurality of stacked second power storage cells. The first case has a first reinforcement portion extending in a first direction, and the second case has a second reinforcement portion extending in a second direction intersecting the first direction. The first case and the second case are provided to overlap with each other along a third direction intersecting the first direction and the second direction, and are joined to each other.

Provided are a battery pack case and a battery pack including the same. A battery pack case is capable of preventing heat from propagating from a trigger module to a normal module by providing a flow channel, through which gas generated during a thermal runaway situation is flowable, in frames constituting the battery pack case, and discharging the gas or like to the outside through the flow channel.

Provided are a battery pack case and a battery pack including the same. A battery pack case is capable of preventing heat from propagating from a trigger module to a normal module by providing a flow channel, through which gas generated during a thermal runaway situation is flowable, in frames constituting the battery pack case, and discharging the gas or like to the outside through the flow channel.