The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2011
Filed:
Oct. 12, 2010
Per Onnerud, Framingham, MA (US);
Phillip E. Partin, Grafton, MA (US);
Richard V. Chamberlain, Ii, Fairfax Station, VA (US);
Jan-roger B. Linna, Boston, MA (US);
Mimmo Elia, Belmont, MA (US);
Per Onnerud, Framingham, MA (US);
Phillip E. Partin, Grafton, MA (US);
Richard V. Chamberlain, II, Fairfax Station, VA (US);
Jan-Roger B. Linna, Boston, MA (US);
Mimmo Elia, Belmont, MA (US);
Boston-Power, Inc., Westborough, MA (US);
Abstract
A low pressure current interrupt device (CID) activates at a minimal threshold internal gauge pressure in a range of, for example, between about 4 kg/cmand about 9 kg/cm. Preferably, the CID includes a first conductive plate and a second conductive plate in electrical communication with the first conductive plate, the electrical communication between the first and the second conductive plates being interrupted at the minimal threshold internal gauge pressure. More preferably, the first conductive plate includes a frustum having a first end and a second end, a base extending radially from a perimeter of the first end of the frustum, and an essentially planar cap sealing the second end of the frustum. The first end has a broader diameter than the second end. More preferably, the second conductive plate is in electrical contact with the essentially planar cap through a weld. A battery, preferably a lithium-ion battery, comprises a CID as described above. A method of manufacturing such a CID comprises forming first and second conductive plates as described above, and welding the second conductive plate onto the first conductive plate while a temperature of the first conductive plate is controlled so as not to exceed the melting point of a surface of the first conductive plate opposite the weld.