Battery and producing method thereof
AssigneeJapan Storage Battery Co., Ltd.
InventorsTAKEFUMI INOUE, KAZUMASA MATSUO, HIROAKI YOSHIDA
Life of this patent
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Abstract
A battery has a battery case body made of aluminum or aluminum alloy, and a battery cover fitted into the battery case body made of aluminum or aluminum alloy. The battery case body and said battery cover have bonding areas, respectively, which are connected by laser welding. In the battery, the thickness of each of bonding areas of a battery case body and a battery cover is smaller than that of the remaining areas.
Claims9
A battery comprising:
- a battery case body comprising aluminum or aluminum alloy;
- and
- a battery cover fitted into said battery case body comprising aluminum or aluminum alloy, said battery case body and said battery cover having bonding areas, respectively, which are connected by laser welding;
- wherein said bonding areas of the battery case body and battery cover are mated with each other and the thickness of said bonding areas is smaller than that of the remaining areas of the battery case body and battery cover.
A battery comprising:
- a battery case body comprising aluminum or aluminum alloy;
- and
- a battery cover fitted into said battery case body comprising aluminum or aluminum alloy, said battery case body and said battery cover having bonding areas, respectively, which are connected by laser welding;
- wherein an oxygen content of aluminum in the bonding areas of the battery case body and battery cover is 1000 ppm or lower.
A battery comprising:
- a battery case body comprising aluminum or aluminum alloy;
- and
- a battery cover fitted into said battery case body comprising aluminum or aluminum alloy, said battery case body and said battery cover having bonding areas, respectively, which are connected by laser welding;
- wherein a cladding material of aluminum or aluminum alloy having a lower melting point than that of the case body is bonded to at least a bonding face of at least one of said battery case body and battery cover.
A method of manufacturing a battery, comprising the steps of:
- forming a notch at an outer edge of a bonding face of at least one of a battery case body and battery cover, which comprise aluminum or aluminum alloy;
- fitting said battery cover into said battery case body so as to constitute a groove due to the notch;
- and
- irradiating the groove with laser light for laser welding said bonding areas of said battery case body and battery cover.
A method of manufacturing a battery comprising the steps of:
- subjecting laser-light-irradiated surface of bonding areas of a battery case body and a battery cover, which comprises aluminum or aluminum alloy, to surface processing so that the surface roughness ranges from 1 μm to 100 μm;
- fitting said battery cover into said battery case body;
- and
- irradiating the bonding areas with laser light for laser welding said bonding areas of said battery case body and battery cover.
Dependencies are inferred from the claim text.