A connection structure of laminate cells is provided. Each of the laminate cells includes a pouch including a laminate film, an electrode assembly enclosed in the pouch, and a plate-shaped terminal connected internally of the pouch to the electrode assembly and extending out of the pouch along one side edge of the pouch. The plate-shaped terminal includes a bent tip. The pouches are stacked on each other, the bent tips of the plate-shaped terminals are overlapped with each other, and the bent tips are intermittently joined together in an overlapped portion where the bent tips are overlapped with each other.

A connection structure of laminate cells is provided. Each of the laminate cells includes a pouch including a laminate film, an electrode assembly enclosed in the pouch, and a plate-shaped terminal connected internally of the pouch to the electrode assembly and extending out of the pouch along one side edge of the pouch. The plate-shaped terminal includes a bent tip. The pouches are stacked on each other, the bent tips of the plate-shaped terminals are overlapped with each other, and the bent tips are intermittently joined together in an overlapped portion where the bent tips are overlapped with each other.

The disclosure relates to a technical field of batteries, and a battery and a battery apparatus are provided. The battery includes a cell, and the cell includes a cell body and tab portions. Each of the tab portions extends from one side of the cell body. The battery further includes a housing. The housing is a hollow structure, and the hollow structure is formed inside the housing. The cell is disposed in the housing, and the housing includes a first surface and a second surface opposite to each other. The first surface is provided with liquid injecting holes, and the liquid injecting holes penetrate the first surface and do not penetrate the second surface. An orthographic projection of the cell body on the first surface does not overlap the liquid injecting holes.

An embodiment of the present invention relates to a pouch-type secondary battery. According to embodiment of the present invention, the pouch-type secondary battery includes: an case configured to house an electrode assembly from which electrode tab are drawn out; sealing parts formed by adhering the case along outer peripheries of the electrode assembly; and folding parts formed by folding the sealing parts of surfaces on which the electrode tab drawn to an outside of the case is not formed, wherein a length of the folding part has a relationship with a thickness of the electrode assembly as the following equation: H≤T/2 (wherein, H is the height of the folded folding part, T is the thickness of the electrode assembly, based on a cross-section perpendicular to a direction in which the electrode tabs of the electrode assembly are drawn out).

An electrode lead for achieving the above object is provided. The electrode lead includes a first electrode lead having one end connected to an electrode tab protruding from one side of an electrode assembly, a second electrode lead having one end connected to the other end of the first electrode lead and the other end protruding to the outside of a battery case accommodating the electrode assembly, and a connection part configured to connect the first electrode lead to the second electrode lead, wherein the connection part is formed by a cured adhesive applied between the first electrode lead and the second electrode lead. The adhesive is formed by a mixture of a conductor and a solvent. The solvent is formed by a mixture of a polymer and a diluent. The solvent contains 5 wt % to 15 wt % of the diluent.

Disclosed is a battery cell, which includes a battery case having an accommodation portion in which a battery assembly is positioned, and a sealing portion formed by sealing an outer periphery thereof by heat fusion; an electrode lead electrically connected to an electrode tab included in the battery assembly, the electrode lead protruding out of the battery case through the sealing portion; and a lead film positioned adjacent to the sealing portion on at least one of a first side and a second side of the electrode lead, wherein the lead film includes a gas discharge portion formed to extend from an inside of the battery case to an outside of the battery case, and the gas discharge portion is opened on a side disposed inside of the battery case.

A battery cell includes an electrode assembly including a plurality of electrode tabs, an electrode lead to which the plurality of electrode tabs are connected, a protective member accommodating a welded portion to which the plurality of electrode tabs and the electrode lead are welded therein, and a case accommodating the electrode assembly and the protective member therein, wherein the protective member includes a first cover disposed on one side of the welded portion and a second cover disposed on the other side of the welded portion and coupled to the first cover.

A battery assembly includes a cell stack including a plurality of battery cells stacked together, a busbar assembly coupled to the cell stack and including a busbar electrically connected to an electrode lead of at least one of the battery cells, a plate unit configured to cover at least a portion of a side surface of the cell stack, a sensing unit coupled to the busbar assembly and disposed outside of the cell stack, and a cell monitoring unit installed on the plate unit and coupled to the sensing unit.

A flexible multi-layer packaging material is provided. The packaging material includes a first film layer, a second film in layer, and at least one electrochemical cell located within the first and second film layers. The electrochemical cell comprises an anode, a cathode, an anode current collector, a cathode current collector, and an electrolyte by which the anode and the cathode are ionically connected. At least one of the first and second film layers is a multi-layer laminate comprising an outer insulating layer, an inner insulating layer, and a conductive moisture barrier layer between the inner and outer insulating layers and in electrical contact with the electrolyte, wherein the conductive moisture barrier layer comprises an anode material such that the conductive moisture barrier layer defines both the anode and the anode current collector of the at least one electrochemical cell or wherein the conductive moisture barrier layer comprises a cathode material such that the conductive moisture barrier layer defines both the cathode and the cathode current collector of the at least one electrochemical cell. A battery pouch cell and a pack of consumer goods comprising a container formed from such a packaging material are also provided.

Disclosed is a negative electrode for a secondary battery, the negative electrode including: a negative electrode current collector; and a negative electrode mixture layer provided on the negative electrode current collector. The negative electrode mixture layer contains a graphite powder and a polymer electrolyte. A powder compact spring-back ratio of the graphite powder is 15 to 35%. Furthermore, disclosed is a secondary battery including: a positive electrode; the above-described negative electrode; and an electrolyte layer provided between the positive electrode and the negative electrode. Further, disclosed is a negative electrode material for a secondary battery, the negative electrode material containing a graphite powder and a polymer electrolyte.