The present disclosure relates to a cap assembly and a power battery. The cap assembly comprises a cap plate including a top surface, a bottom surface opposed to the top surface in a thickness direction and a liquid injection hole penetrating through the cap plate from the top surface to the bottom surface, the liquid injection hole having an inlet provided on the top surface and an outlet provided on the bottom surface; and a blocking member provided on the bottom surface, a projection of the blocking member in the thickness direction at least partially covers the outlet, wherein a fluid channel is formed between the blocking member and the cap plate, and the fluid channel communicates with the outlet of the liquid injection hole. The cap assembly can be applied to the power battery.

Provided is a top cover structure for power battery, including a first electrode assembly, a second electrode assembly, a top cover plate electrically connected with the first electrode assembly, and a deformable plate attached to the top cover plate; the second electrode assembly includes a second electrode terminal, a second connecting block, a second insulating piece in which a via-hole and an gas-guide hole are defined, an upper sealing piece arranged between the second insulating piece and the second connecting block and including a sealing area for deforming space and a sealing area for electrode terminal, and a lower sealing piece arranged between the second insulating piece and the top cover plate and enclosing the via-hole for deformable plate. The sealing area for deforming space encloses the via-hole and the gas-guide hole, the sealing area for electrode terminal enclose the second electrode terminal.

A cell, in particular a button cell, and to a method for manufacturing such a cell, the method includes providing a first part and a second part intended to respectively form the lid and the cup of the housing, the first part including an edge area with a zone inclined or perpendicular with respect to a center axis of the housing; applying a layer of adhesive on the edge area of the first part; then inserting the first part into an open end of the second part, the layer of adhesive on the edge area being finally turned towards the open end of the second part; closing the housing by bending an upper portion of the side wall on the zone of the edge area provided with the layer of adhesive, and curing the layer of adhesive to form an adhesive joint sealing the housing.

For the battery capable of bidirectional output in the embodiments, the two ends of the battery are both provided with a battery anode and a battery cathode respectively, such that any end of the battery can provide an anode output terminal and a cathode output terminal simultaneously. Circuit wiring of the battery can be optimized during use, and the first end of the battery capable of bidirectional output is provided with a first battery anode which protrudes outwards, and the second end thereof is provided with a second battery cathode which protrudes outwards. The battery in has a structure which is similar to that of a common battery, thus the battery can be charged with a common charger, then short circuiting is prevented, and no charger needs to be specially designed.

A battery cell includes: (i) a cylindrical cell housing having a hollow cylinder; (ii) an electrically conductive closure plate closing the hollow cylinder at an end face and having an opening; (iii) an electrode of a first electrical polarity and an electrode of a second electrical polarity opposite to the first polarity, the electrodes being separated by a separator; (iv) an electrically conductive rod, which extends along a longitudinal axis of the hollow cylinder as far as the opening, so that, at a first end of the rod, the rod is electrically contactable through the opening. The electrode of the first polarity is electrically connected to the closure plate. The electrode of the second polarity is electrically connected to the electrically conductive rod at a second end of the rod different from the first end, the electrically conductive rod being electrically isolated from the electrically conductive closure plate.

A cylindrical battery cell, a battery and a method for forming cylindrical battery cell are provided. In the cylindrical cell, an aluminum terminal of a cap component is welded with an aluminum current collector, a copper terminal of the cap component is welded with a first copper current collector which is connected to a copper component; the copper component is at least partly configured on a lateral surface of the jellyroll structure and is isolated from the aluminum current collector. Therefore, the thickness of the cell housing is decreased and an energy gravimetric and volumetric density of the cell is increased.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case configured to be connected to the first electrode to accommodate the electrode assembly, and including an opening to receive the electrode assembly; a cap plate configured to be coupled with the case to cover an outer area of the opening, and including a through-hole to expose a central area of the opening; and a terminal plate configured to be connected to the second electrode and to be insulation-bonded to the cap plate, and including a flange portion covering the through-hole, and a protrusion penetrating the through-hole from the flange portion.

Provided is a top cover structure for power battery, including a first electrode assembly, a second electrode assembly, a top cover plate electrically connected with the first electrode assembly, and a deformable plate attached to the top cover plate; the second electrode assembly includes a second electrode terminal, a second connecting block, a second insulating piece in which a via-hole and an gas-guide hole are defined, an upper sealing piece arranged between the second insulating piece and the second connecting block and including a sealing area for deforming space and a sealing area for electrode terminal, and a lower sealing piece arranged between the second insulating piece and the top cover plate and enclosing the via-hole for deformable plate. The sealing area for deforming space encloses the via-hole and the gas-guide hole, the sealing area for electrode terminal enclose the second electrode terminal.

Hearing devices configured to fit within the bony portion of the ear canal and batteries that may be used with same.

A battery structure is disclosed. The battery structure includes a first current collector layer, a first active material layer, a spacer layer, a first plastic frame, a second active material layer and a second current collector layer. The first active material layer is disposed on the first current collector layer. The spacer layer is disposed on the first active material and completely covers the top surface of the first active material layer. The first plastic frame is disposed on the side wall of the spacer layer and the top of the first plastic frame has a protruding part which extends to the top surface of the spacer. The second active material layer is disposed on the spacer layer and the protruding part. The second active material is isolated from the first active material via the space layer and the protruding part. The second current collector layer is disposed on the second active material layer.