Battery, in particular a button battery, and method of manufacturing same
AssigneeThe Swatch Group Research and Development Ltd
InventorOlga REINAUER
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a battery, in particular a button battery, including a case, provided with a container and a cap, and a polymer gasket, in particular made of polypropylene, compressed and bonded between the container and the cap. The method successively includes a step of implanting a silicatised layer by tribochemical sand blasting on all or part of the surface of the gasket, a step of adding a layer of adhesive to the surface of the gasket including the silicatised layer and/or on all or part of the surface of the container and of the surface of the cap intended to be joined to the gasket, a step of assembling the case with the gasket positioned by compression and bonding with the layer of adhesive between the container and the cap.
Claims15
A method of manufacturing a battery, comprising:
- a case provided with a container and a cap,
- a polymer gasket made of a polyolefin-based thermoplastic resin, said polymer gasket being compressed between the container and the cap and bonded to the case in order to seal the case and galvanically isolate the container from the cap;
- the method comprising successively:
- a step of implanting, by tribochemical sand blasting on all or part of the surface of the polymer gasket intended to be joined to the case, alumina particles coated in silica in order to form, on all or part of said surface of the polymer gasket, a silicatised layer,
- a step of adding a layer of adhesive to the surface of the polymer gasket comprising the silicatised layer and/or on all or part of the surface of the container and/or of the surface of the cap intended to be joined to the polymer gasket,
- a step of assembling the case with the polymer gasket positioned by compression between the container and the cap and bonded to the case with said layer of adhesive.
A battery, comprising:
- a case provided with a container and a cap,
- a polymer gasket made of a polyolefin-based thermoplastic resin, the polymer gasket being compressed between the container and the cap and bonded to the case with a layer of adhesive in order to seal the case and galvanically isolate the container from the cap;
- wherein the polymer gasket comprises a silicatised layer implanted on all or part of the surface thereof, the silicatised layer being located at least partially under the layer of adhesive, in order to improve the adhesion between the polymer gasket and the layer of adhesive.
Dependencies are inferred from the claim text.