A ballistic resistant case for a secondary battery having a rectangular metal case (160) with a panel (160p) connected to the bottom wall and the side walls to divide the internal space of the case into cell pack receiving bays (160b). A bus bar (170) extends from the front wall, across the top of the panel, to the rear wall. A connector (162, 170f, 180a) secures the cover (180) to the panel (160p) with the bus bar (170) sandwiched therebetween. The bus bar (170) reinforces a central portion of the cover (180) and prevents the panel (160p) and the walls from deflecting to provide ballistic protection for the cell packs (24).

The invention relates to an electric battery (1) for a motor vehicle which is electrically or partly electrically driven or a movable or stationary unit, having a battery housing (5) and a plurality of battery cells (2) arranged therein. The aim of the invention is to allow such an electric battery (1) to be produced with minimal costs and technical structural complexity while still having a high degree of operational reliability. This is achieved in that the battery housing (5) is made of an expanded or foamed plastic.

A battery module includes a battery cell stack in which a plurality of battery cells are stacked, a module frame for housing the battery cell stack, and an end plate for covering the front and rear surfaces of the battery cell stack and coupled to the module frame, wherein the end plate is formed of an insulating material.

A battery module includes a battery cell stack in which a plurality of battery cells are stacked, a module frame for housing the battery cell stack, and an end plate for covering the front and rear surfaces of the battery cell stack and coupled to the module frame, wherein the end plate is formed of an insulating material.

A battery module includes: a plurality of battery cells each of which has a flat shape; a plurality of elastic spacers laminated and disposed alternately with the battery cells; and a restraining member configured to restrain the battery cells and the elastic spacers in a laminating direction of the battery cells. Each of the elastic spacers has a sheet portion that extends between two adjacent battery cells and a plurality of protrusions that protrudes from one surface of the sheet portion. The protrusions are disposed at an equal interval along at least a first direction. When an interval between the protrusions in the first direction is x and a dimension of each protrusion in the first direction is y, relationships of 4 mm≤y≤18 mm, y≥4/9x−10/3, and y≤x−2 are satisfied.

A battery module includes: a plurality of battery cells each of which has a flat shape; a plurality of elastic spacers laminated and disposed alternately with the battery cells; and a restraining member configured to restrain the battery cells and the elastic spacers in a laminating direction of the battery cells. Each of the elastic spacers has a sheet portion that extends between two adjacent battery cells and a plurality of protrusions that protrudes from one surface of the sheet portion. The protrusions are disposed at an equal interval along at least a first direction. When an interval between the protrusions in the first direction is x and a dimension of each protrusion in the first direction is y, relationships of 4 mm≤y≤18 mm, y≥4/9x−10/3, and y≤x−2 are satisfied.

A battery cell includes a casing provided with an accommodation space; and an electrode assembly accommodated in the accommodation space and contacting the casing. The electrode assembly may include a negative electrode including a first current collector and a negative electrode mixture applied to the first current collector; a positive electrode including a second current collector and a positive electrode mixture applied to the second current collector; a separator interposed between the positive electrode and the negative electrode; and a guide member accommodating at least one of the negative electrode and the positive electrode and pressurized or stretched by at least one of the negative electrode and the positive electrode to contract or expand.

A battery cell includes a casing provided with an accommodation space; and an electrode assembly accommodated in the accommodation space and contacting the casing. The electrode assembly may include a negative electrode including a first current collector and a negative electrode mixture applied to the first current collector; a positive electrode including a second current collector and a positive electrode mixture applied to the second current collector; a separator interposed between the positive electrode and the negative electrode; and a guide member accommodating at least one of the negative electrode and the positive electrode and pressurized or stretched by at least one of the negative electrode and the positive electrode to contract or expand.

A vehicle battery mounting structure includes a battery case, which has a reinforcing member disposed between battery modules therein. The mounting structure includes battery side members, which have a plurality of closed cross-sections, are provided on opposite sides of the battery case, respectively, and are coupled to lower sides of frame side members. The mounting structure further includes a middle through-fastener, which extends through the reinforcing member of the battery case and is coupled to a vehicle body cross member.

A vehicle battery mounting structure includes a battery case, which has a reinforcing member disposed between battery modules therein. The mounting structure includes battery side members, which have a plurality of closed cross-sections, are provided on opposite sides of the battery case, respectively, and are coupled to lower sides of frame side members. The mounting structure further includes a middle through-fastener, which extends through the reinforcing member of the battery case and is coupled to a vehicle body cross member.