Provided is a battery assembly, which includes a cover plate and a pole. The pole penetrates the cover plate and is fixed with the cover plate by riveting. For the battery assembly provided by the application, the pole and the cover plate are fixed by riveting. Compared with the fixing method of welding, it not only simplifies the fixing operation, improves the production efficiency, but also reduces the production cost. Also provided are a preparation method of a battery assembly, a battery and an electric vehicle.

An electrochemical energy storage cell comprising a cell winding received in a casing, wherein the casing is closed at least on one end face by a cover, wherein the cover has a fixing portion for fixing the cover on the casing and a pole portion for contacting a conductor of the cell winding, wherein the fixing portion and the pole portion are connected to one another via a compensating element, wherein the compensating element is formed to be elastic and electrically insulating.

A battery includes a battery cell and a terminal post. The first casing includes a first arc sidewall and a flat sidewall connected to the first arc sidewall and the first sidewall. The terminal post is disposed on the flat sidewall. Instead of disposing the terminal post on top of the battery, increased thickness of the battery due to the terminal post is avoided in the present disclosure. The internal space of an electrode device can be fully utilized. In addition, it can prevent the terminal post from occupying the top of the battery and decreasing the number of the electrode plates. Thus, the present disclosure can avoid the reduce of the number of the electrode plates and increase the energy density of the battery.

A battery includes a battery cell and a terminal post. The first casing includes a first arc sidewall and a flat sidewall connected to the first arc sidewall and the first sidewall. The terminal post is disposed on the flat sidewall. Instead of disposing the terminal post on top of the battery, increased thickness of the battery due to the terminal post is avoided in the present disclosure. The internal space of an electrode device can be fully utilized. In addition, it can prevent the terminal post from occupying the top of the battery and decreasing the number of the electrode plates. Thus, the present disclosure can avoid the reduce of the number of the electrode plates and increase the energy density of the battery.

The present application relates to the field of batteries, in particular to a battery, a battery module and an electric equipment. The battery of the present application includes: a connection member, including a first connection portion configured to be electrically connected with an electrode assembly and a second connection portion configured to be electrically connected with an electrode terminal, and the first connection portion is in a folded state along a crease relative to the second connection portion; the crease is arranged between a first end face and a second end face of the first connection portion; and when the connection member is in an expanded state, the second end face and the first end face are arranged along a length direction.

A heat rejection panel comprising a first and a second plate. The first plate comprises an oscillating heat pipe face having a plurality of first opened elongated recesses formed therein, and the second plate comprises an oscillating heat pipe face having a plurality of second open elongated recesses formed therein. The first plate oscillating heat pipe face is hermetically sealed to the second plate oscillating heat pipe face forming a bond joint therebetween. The first plate caps the second open elongated recesses and the second plate caps the first open elongated recesses such that first open elongated recesses are physically and fluidly connected to the second open elongated recesses, thereby forming at least one non-planar oscillating heat pipe channel within the panel that reciprocates back and forth across the bond joint having the bond joint as a longitudinal axis.

An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.

The present invention provides a lithium secondary battery which includes an electrode assembly to which an electrode tap is attached, an electrode tap receptor configured to house a portion of the electrode assembly such that a portion of the electrode tap protrudes to an outside, and a case configured to surround the electrode assembly and seal the electrode assembly together with the electrode tap receptor, wherein the electrode tap receptor includes a gas barrier layer.

A riveting structure of an electrode terminal includes a battery can, an electrode terminal riveted through a through-hole formed in a bottom of the battery can, and a gasket between the battery can and the electrode terminal, in which the electrode terminal includes a body portion inserted into the through-hole, an outer flange portion extending along an outer surface of the bottom of the battery can and an inner flange portion extending toward an inner surface of the bottom of the battery can, in which the body portion and the outer flange portion respectively have inner cavities connected to each other, and in which the inner flange portion has an opening portion connected to the inner cavities and opened in a direction toward the inside of the battery can.

A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly, a lower end of the cylindrical can being electrically connected to the negative electrode plate; a terminal passing through a top surface of the cylindrical can and electrically connected to the positive electrode plate; and a cap plate coupled at the lower end of the cylindrical can. The cap plate is sealed to the lower end of the cylindrical can by welding.