Rechargeable battery having a plate terminal and a bolt terminal
View Patent ↗A rechargeable battery including an electrode assembly; a case including a cavity, the electrode assembly being in the cavity; a cap plate coupled with an opening of the case; and an electrode terminal extending through a terminal hole of the cap plate, the electrode terminal being electrically insulated from the cap plate and electrically connected to the electrode assembly, wherein the electrode terminal includes a plate terminal disposed on an external surface of the cap plate, and a bolt terminal extending at least partially in and being secured to the plate terminal.
1. A rechargeable battery, comprising:
an electrode assembly;
a case including a cavity, the electrode assembly being in the cavity;
a cap plate coupled with an opening of the case; and
an electrode terminal extending through a terminal hole of the cap plate, the electrode terminal being electrically insulated from the cap plate and electrically connected to the electrode assembly, wherein the electrode terminal includes
a plate terminal on an external surface of the cap plate and including a screw portion, and
a bolt terminal including a first bolt extending at least partially in and being screwed to the screw portion of the plate terminal, the bolt terminal further including a second bolt connected to the first bolt and protruding outside the plate terminal and outside the rechargeable battery, a diameter of the second bolt being less than a diameter of the first bolt, wherein the plate terminal includes a raised spot that is deformed when the first bolt is coupled with the screw portion, the raised spot extending above the first bolt, and wherein the raised spot includes a rivet to further fasten the first bolt and the plate terminal.
2. The rechargeable battery as claimed in claim 1 , wherein
the screw portion of the plate terminal includes a female thread, and
the first bolt includes a male thread.
3. The rechargeable battery as claimed in claim 2 , wherein
the plate terminal includes
a protrusion extending from a center portion of the screw portion and protruding in a direction parallel to a direction in which the screw portion extends, the protrusion supporting the bolt terminal.
4. The rechargeable battery as claimed in claim 3 , wherein
the plate terminal includes a space between the protrusion and a sidewall of the screw portion.
5. The rechargeable battery as claimed in claim 3 , further including
an insulator between the plate terminal and the cap plate, wherein
a portion of the insulator is under the protrusion and the bolt terminal, the portion of the insulator supporting a side of the protrusion.
6. The rechargeable battery as claimed in claim 1 , wherein
a top surface of the first bolt and the raised spot of the plate terminal corresponding in position to the top surface include a welding bead.
7. The rechargeable battery as claimed in claim 1 , wherein
the raised spot further includes a groove below an external surface of the plate terminal.
8. The rechargeable battery as claimed in claim 1 , wherein
the bolt terminal has a tightening recess on a top surface thereof.
9. The rechargeable battery as claimed in claim 1 , wherein
the plate terminal and the cap plate include the same material, and
the bolt terminal includes a material different from the material included in the plate terminal.
10. The rechargeable battery as claimed in claim 1 , wherein
the plate terminal includes aluminum, and
the bolt terminal includes aluminum.
11. The rechargeable battery as claimed in claim 1 , wherein
the plate terminal includes aluminum, and
the bolt terminal includes stainless steel.
12. A rechargeable battery, comprising:
a case;
an electrode assembly in the case;
a cap plate coupled with the case; and
an electrode terminal extending through a terminal hole of the cap plate, the electrode terminal being electrically insulated from the cap plate and electrically connected to the electrode assembly, the electrode terminal including:
a plate terminal on an external surface of the cap plate and including a screw portion, and
a bolt terminal including a first bolt extending at least partially in and being screwed to the screw portion of the plate terminal, the bolt terminal further including a second bolt connected to the first bolt and protruding outside the plate terminal and outside the rechargeable battery, a diameter of the second bolt being less than a diameter of the first bolt, the plate terminal including a raised spot that is deformed when the first bolt is coupled with the screw portion, the raised spot extending above the first bolt, and the raised spot further including a bus bar receiving groove below an external surface of the plate terminal.
13. A rechargeable battery, comprising:
an electrode assembly;
a case including a cavity, the electrode assembly being in the cavity;
a cap plate coupled with an opening of the case; and
an electrode terminal extending through a terminal hole of the cap plate, the electrode terminal being electrically insulated from the cap plate and electrically connected to the electrode assembly, wherein the electrode terminal includes
a plate terminal on an external surface of the cap plate and including a screw portion, and
a bolt terminal including a first bolt extending at least partially in and being screwed to the screw portion of the plate terminal, the bolt terminal further including a second bolt connected to the first bolt and protruding outside the plate terminal and outside the rechargeable battery, a diameter of the second bolt being less than a diameter of the first bolt, wherein the plate terminal includes a raised spot that is deformed when the first bolt is coupled with the screw portion, the raised spot extending above the first bolt.