An embodiment is directed to a contact plate configured to establish electrical bonds between battery cells in a battery module, including at least one primary conductive layer, and a set of bonding connectors that are configured to provide direct electrical bonds between the contact plate and terminals of a group of battery cells, the set of bonding connectors being configured to connect the group of battery cells in parallel with each other, wherein at least one bonding connector in the set of bonding connectors is configured with a higher fuse rating than each other bonding connector in the set of bonding connectors so as to contain arcs among the set of bonding connectors to the at least one bonding connector.

A battery, a powered device, and a method and device for preparing a battery are provided. In some embodiments, the battery includes battery cells; a box body; and a partition assembly configured to partition the box body into a first accommodating portion and a second accommodating portion, wherein the first accommodating portion is configured to accommodate an electrical component, the second accommodating portion is configured to accommodate the battery cells, a communication portion is formed in the partition assembly, the electrical component and the battery cells are electrically connected via a connecting component, the connecting component penetrates the communication portion, the partition assembly has a first partition component and a second partition component that are connected, and the communication portion is formed by assembling the first partition component and the second partition component.

A battery, a powered device, and a method and device for preparing a battery are provided. In some embodiments, the battery includes battery cells; a box body; and a partition assembly configured to partition the box body into a first accommodating portion and a second accommodating portion, wherein the first accommodating portion is configured to accommodate an electrical component, the second accommodating portion is configured to accommodate the battery cells, a communication portion is formed in the partition assembly, the electrical component and the battery cells are electrically connected via a connecting component, the connecting component penetrates the communication portion, the partition assembly has a first partition component and a second partition component that are connected, and the communication portion is formed by assembling the first partition component and the second partition component.

A battery pack includes: a first secondary battery cell and a second secondary battery cell each having a cylindrical shape and connected in series and/or in parallel with each other; a housing case; and a longitudinal partition plate having a thermal insulation property, and disposed at an interface between the first secondary battery cell and the second secondary battery cell housed in the internal space of the housing case. The longitudinal partition plate constitutes a first thermal insulator that projects from a side facing the side surface of the cylindrical shape of the first secondary battery cell, and constitutes a second thermal insulator that projects from a side facing the side surface of the cylindrical shape of the second secondary battery cell.

Disclosed is a battery pack in which a seating recess is provided in a horizontal frame so that connection members pass through the horizontal frame through the seating recess, thereby maximizing a height of the horizontal frame. A vertical frame cover is provided in a vertical frame to secure a height of the vertical frame side in each module space. A sealing member is provided in the seating recess to seal the seating recess. A double shielding structure, including a module space cover shielding each module space and a battery pack cover shielding a battery pack housing as a whole, is provided to maximize airtightness of the battery pack.

A rechargeable battery includes: an electrode assembly formed by disposing first and second electrodes on either side of each separator, the first and second electrodes each having coated regions and uncoated region tabs; a case for accommodating the electrode assembly; and a cap plate attached to an opening of the case to close and seal the case and having a vent plate formed integrally with a vent hole, wherein the vent plate is formed beyond the thickness of the cap plate.

A battery pack includes a pack housing including a plurality of accommodation spaces; a partition member coupled to the pack housing and partitioning a space of the pack housing into the plurality of accommodation spaces; a plurality of pack units respectively disposed in the plurality of accommodation spaces; a first pack cover in contact with the partition member and covering at least one of the plurality of accommodation spaces or the pack unit; and a second pack cover covering the first pack cover and the pack housing.

An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit is repeatedly disposed and has same number of electrodes and separators which are alternately disposed and integrally combined, or (b) a structure in which at least two kinds of radical units are disposed in a predetermined order, and an auxiliary unit disposed on at least one among an uppermost part or a lowermost part of the cell stack part. The one kind of radical unit of (a) has a four-layered structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked, and each of the at least two kinds of radical units are stacked by ones in the predetermined order to form the four-layered structure or the repeating structure.

An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit is repeatedly disposed and has same number of electrodes and separators which are alternately disposed and integrally combined, or (b) a structure in which at least two kinds of radical units are disposed in a predetermined order, and an auxiliary unit disposed on at least one among an uppermost part or a lowermost part of the cell stack part. The one kind of radical unit of (a) has a four-layered structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked, and each of the at least two kinds of radical units are stacked by ones in the predetermined order to form the four-layered structure or the repeating structure.

A partition plate includes a partition substrate, a positive electrode membrane, a negative electrode membrane, and an insulation layer. The positive electrode membrane and the negative electrode membrane are respectively located on two surfaces of the partition substrate. The insulation layer is disposed on the partition substrate and the insulation layer is disposed at a periphery of the positive electrode membrane. A zone surrounded by orthographic projection of an outer edge of the insulation layer on the partition substrate covers orthographic projection of the negative electrode membrane on the partition substrate. This application can improve self-discharge and safety performances of electrochemical apparatuses.