The disclosure provides a battery pack and a battery cell. The battery pack includes a plurality of battery cells, wherein two adjacent battery cells in the plurality of battery cells are connected to each other by a conductive adhesive layer, and each battery cell includes a cathode collector, a cathode layer, a separator, an anode layer and an anode collector which are stacked in a thickness direction; and the plurality of battery cells are sequentially stacked in the thickness direction to form the battery pack, and the battery pack is able to form a current channel in the thickness direction when charged or discharged; wherein the conductive adhesive layer is provided with two opposite main surfaces, one main surface being connected to the cathode collector of one battery cell, and the other main surface being connected to the anode collector of the other battery cell.

A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell casing comprises an open-ended ceramic container having a via hole providing an electrically conductive pathway extending through the container. A metal lid closes the open-end of the container. An electrode assembly housed inside the casing comprises an anode current collector deposited on an inner surface of the ceramic container in contact with the electrically conductive pathway in the via hole. An anode active material contacts the current collector and a cathode active material contacts the metal lid. A separator is disposed between the anode and cathode active materials. That way, the electrically conductive pathway serves as a negative terminal, and the lid, electrically isolated from the conductive pathway by the ceramic container, serves as a positive terminal. The negative and positive terminals are configured for electrical connection to a load.

A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell casing comprises an open-ended ceramic container having a via hole providing an electrically conductive pathway extending through the container. A metal lid closes the open-end of the container. An electrode assembly housed inside the casing comprises an anode current collector deposited on an inner surface of the ceramic container in contact with the electrically conductive pathway in the via hole. An anode active material contacts the current collector and a cathode active material contacts the metal lid. A separator is disposed between the anode and cathode active materials. That way, the electrically conductive pathway serves as a negative terminal, and the lid, electrically isolated from the conductive pathway by the ceramic container, serves as a positive terminal. The negative and positive terminals are configured for electrical connection to a load.

The embodiments of the present application provide a battery cell, a method and system for manufacturing a battery cell, a battery and an electrical device. The battery cell includes: an electrode assembly, including a first tab and a second tab with opposite polarities; a casing for accommodating the electrode assembly, wherein the casing includes a cylinder body and a cover body connected to the cylinder body, the cylinder body is disposed around an outer periphery of the electrode assembly, the cover body is provided with an electrode lead-out hole, and at least part of the cover body is used for electrically connecting a first connecting member of the battery and the first tab; and an electrode terminal for electrically connecting a second connecting member of the battery and the second tab.

A battery comprises a first polarity terminal that is attached via a first insulating member to an opening of an outer case. A first polarity plate includes: a first core formed of a conductive material; and a first active material layer. A first drawn-out portion is formed from a side of the first core on the first polarity terminal side thereof being drawn further out than a side of the first active material layer on the first polarity terminal side thereof. The first drawn-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body. A first surface of a first polarity collector plate contacts the surface of the first bent portion on the first polarity terminal side, and the first polarity terminal connects directly or via a conductive member to a second surface of the first polarity collector plate.

The present invention comprises: an electrode assembly in which a separator is interposed in between a first electrode and a second electrode; a case for accommodating the electrode assembly; a cap plate for sealing an opening at the upper end of the case, wherein a first terminal electrically connected to the first electrode of the electrode assembly is integrally formed with the cap plate; at least one stepped portion protruding upward from the cap plate; and a plate terminal arranged on the exterior of the cap plate, wherein the plate terminal is provided with, on a bottom part thereof, a recessed groove having a size and a depth corresponding to the size and the height of the stepped portion. A secondary battery, according to one embodiment of the present invention, is provided with the protruding stepped portion on the cap plate so that the terminal can be fixed so as to prevent shifting to the left or to the right.

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.

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 secondary battery includes an outer package member, a battery device, and a non-aqueous solution. The outer package member includes iron. The battery device and the non-aqueous solution are contained inside the outer package member. The battery device includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode and the negative electrode are opposed to each other and are wound. The positive electrode and the negative electrode are each impregnated with the electrolytic solution. The negative electrode is electrically coupled to the outer package member, and includes at least one selected from the group consisting of polyvinylidene difluoride, a polyacrylic acid, a polyacrylic acid salt, polyacrylonitrile, and derivatives thereof. The non-aqueous solution is disposed in at least a portion of a space around the battery device inside the outer package member. The electrolytic solution and the non-aqueous solution each include a dinitrile compound. A content of the dinitrile compound in the electrolytic solution is less than 0.01 wt %. A content of the dinitrile compound in the non-aqueous solution is greater than or equal to 0.01 wt % and less than or equal to 0.1 wt %.

A battery cell assembly, including a cell having a first electrode and a second electrode rolled together to form a cylindrical shape; a first end cap disposed on a first end of the cell and contacting the first electrode; a second end cap disposed on a second end of the cell and contacting the second electrode; and a jacket configured to couple the first end cap and the second end cap to the cell, the jacket made from a non-conductive material.