CPC H01M 6/02 (2013.01) [H01M 4/08 (2013.01); H01M 6/164 (2013.01); H01M 6/166 (2013.01); H01M 4/364 (2013.01); H01M 4/405 (2013.01); H01M 4/667 (2013.01); H01M 50/533 (2021.01); H01M 2300/004 (2013.01)] | 9 Claims |
1. A lithium primary battery comprising:
an electrode body;
a nonaqueous electrolyte solution;
a battery can that houses the electrode body and the nonaqueous electrolyte solution;
a sealing body that seals an opening of the battery can; and
a current collecting wire that electrically connects the electrode body and the sealing body,
wherein the electrode body includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode,
the negative electrode includes metal lithium, or includes metal lithium and a lithium alloy,
the current collecting wire includes:
a first lead connected to one of the positive electrode and the negative electrode;
a second lead connected to the sealing body or the battery can; and
an overdischarge suppressing element interposed between the first lead and the second lead,
the overdischarge suppressing element includes:
a first metal layer connected to the first lead, the first metal layer being thinner than the first lead;
a second metal layer connected to the second lead, the second metal layer being thinner than the second lead; and
a conductive layer interposed between the first metal layer and the second metal layer disposed to face each other,
the conductive layer includes a resin and a conductive material dispersed in the resin,
an insulating plate is arranged between the electrode body and the sealing body, and the overdischarge suppressing element is arranged between the insulating plate and the sealing body,
the conductive material inserts lithium ions at a potential that is lower than a potential of the positive electrode, and
wherein a distance from a connection between the first lead and the positive electrode or the negative electrode to a center of the overdischarge suppressing element is less than or equal to 2L/3 where L represents a length of the current collecting wire.
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