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A mandrel for use in a battery assembly may include a positive mandrel portion and a negative mandrel portion. Each of the mandrel portions may include a connector element coupling region and an electrode coupling region. The connector element coupling region may be configured to be coupled to a con

A mandrel for use in a battery assembly may include a positive mandrel portion and a negative mandrel portion. Each of the mandrel portions may include a connector element coupling region and an electrode coupling region. The connector element coupling region may be configured to be coupled to a connector element and the electrode coupling region may be configured to be coupled to an electrode.

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1. A mandrel for an electrode assembly comprising: a positive mandrel portion and a negative mandrel portion spaced apart from the positive mandrel portion, wherein at least one mandrel portion of the positive mandrel portion and the negative mandrel portion comprises: a connector element coupling p

1. A mandrel for an electrode assembly comprising: a positive mandrel portion and a negative mandrel portion spaced apart from the positive mandrel portion, wherein at least one mandrel portion of the positive mandrel portion and the negative mandrel portion comprises: a connector element coupling portion configured for coupling the mandrel portion to a connector element, wherein the connector element coupling portion comprises a first conductive material, andan electrode coupling portion electrically coupled to the connector element coupling portion and configured for coupling the mandrel portion to an electrode, wherein the electrode coupling portion comprises a second conductive material,wherein at least a portion of the electrode coupling portion is positioned adjacent to at least a portion of the connector element coupling portion to mechanically couple the connector element coupling portion and the electrode coupling portion. 2. The mandrel of claim 1, wherein the second conductive material is different than the first conductive material. 3. The mandrel of claim 1, wherein at least a portion of the electrode coupling portion is wrapped about at least a portion of the connector element coupling portion to mechanically couple the connector element coupling portion and the electrode coupling portion. 4. The mandrel of claim 1, wherein each of the connector element coupling portion and the electrode coupling portion comprises an outer surface and an inner surface, wherein at least 15% of the inner surface of the electrode coupling portion is positioned adjacent to at least 15% of the outer surface of the connector element coupling portion to mechanically couple the connector element coupling portion and the electrode coupling portion. 5. The mandrel of claim 1, wherein at least a portion of the connector element coupling portion and at least a portion of the electrode coupling portion are crimped to each other to mechanically couple the connector element coupling portion and the electrode coupling portion. 6. The mandrel of claim 1, wherein at least one mandrel portion of the positive mandrel portion and the negative mandrel portion further comprises a tying portion positioned between the at least a portion of the electrode coupling portion and the at least a portion of the connector element coupling portion positioned adjacent to each other to further mechanically couple the connector element coupling portion and the electrode coupling portion. 7. The mandrel of claim 1, wherein the connector element coupling portion defines a connector element region configured to be coupled to a connector element. 8. The mandrel of claim 1, wherein the connector element coupling portion defines a connector element channel configured for receiving a connector element to be coupled therein. 9. The mandrel of claim 8, wherein one of the connector element coupling portion and the electrode coupling portion defines one or more finger portions configured to contact a connector element located in the connector element channel. 10. The mandrel of claim 1, wherein the electrode coupling portion defines at least a planar surface for coupling an electrode thereto. 11. The mandrel of claim 1, wherein the mandrel further comprises a removable portion removably coupled to both of the positive mandrel portion and the negative mandrel portion. 12. The mandrel of claim 1, wherein the first conductive material comprises titanium and the second conductive material comprises aluminum. 13. The mandrel of claim 1, wherein the connector element comprises the first conductive material and the electrode comprises the second conductive material. 14. A mandrel for an electrode assembly comprising: a positive mandrel portion and a negative mandrel portion spaced apart from the positive mandrel portion, wherein at least one mandrel portion of the positive mandrel portion and the negative mandrel portion comprises: a connector element coupling portion comprising a first conductive material, wherein the connector element coupling portion defines a plurality of alternating fold portions spaced apart from one another defining a connector element coupling region configured for coupling the mandrel portion to a connector element, andan electrode coupling portion electrically coupled to the connector element coupling portion and configured for coupling the mandrel portion to an electrode, wherein the electrode coupling portion comprises a second conductive material,wherein at least a portion of the electrode coupling portion is positioned adjacent to at least a portion of the connector element coupling portion to mechanically couple the connector element coupling portion and the electrode coupling portion. 15. A method of providing an electrode assembly comprising a mandrel portion, the method comprising: providing a connector element coupling portion, wherein the connector element coupling portion comprises a first conductive material;providing an electrode coupling portion, wherein the electrode coupling portion comprises a second conductive material;coupling at least a portion of the connector element coupling portion to at least a portion of the electrode coupling portion to electrically and mechanically couple the connector element coupling portion and the electrode coupling portion, wherein the connector element coupling portion is configured for coupling the mandrel portion to a connector element and the electrode coupling portion configured for coupling the mandrel portion to an electrode. 16. The method of claim 15, wherein the second conductive material is different than the first conductive material. 17. The method of claim 15, wherein coupling at least a portion of the connector element coupling portion to at least a portion of the electrode coupling portion comprises wrapping at least a portion of the electrode coupling portion about at least a portion of the connector element coupling portion. 18. The method of claim 15, wherein coupling at least a portion of the connector element coupling portion to at least a portion of the electrode coupling portion comprises welding at least a portion of the electrode coupling portion to at least a portion of the connector element coupling portion. 19. The method of claim 15, wherein each of the connector element coupling portion and the electrode coupling portion comprises an outer surface and an inner surface, and wherein coupling at least a portion of the connector element coupling portion to at least a portion of the electrode coupling portion comprises: positioning at least a portion of the inner surface of the electrode coupling portion adjacent to at least a portion of the outer surface of the connector element coupling portion, andprogressively coupling the electrode coupling portion and the connector element coupling portion. 20. The method of claim 15, wherein the method further comprises providing a tying portion, and wherein coupling at least a portion of the connector element coupling portion to at least a portion of the electrode coupling portion comprises positioning the tying portion between the at least a portion of the electrode coupling portion and the at least a portion of the connector element coupling portion positioned adjacent to each other to further mechanically couple the connector element coupling portion and the electrode coupling portion. 21. The method of claim 15, wherein the method further comprises forming a connector element channel in the connector element coupling portion configured for receiving a connector element to be coupled therein. 22. The method of claim 21, wherein the method further comprises: providing a connector element,positioning the connector element in the channel, andcoupling the connector element to the connector element coupling portion. 23. The method of claim 15, wherein the method further comprises: providing an electrode,positioning the electrode adjacent to at least an electrode coupling region of the electrode coupling portion, andcoupling the electrode to the electrode coupling portion. 24. The method of claim 15, wherein the method further comprises: providing a removable portion removably coupled to at least one of the connector element coupling portion and the electrode coupling portion, andremoving the removable portion after winding at least one electrode about the mandrel portion. 25. The method of claim 15, wherein the first conductive material comprises titanium and the second conductive material comprises aluminum. 26. The method of claim 15, wherein the connector element comprises the first conductive material and the electrode comprises the second conductive material. 27. An implantable medical device comprising: an electrode assembly comprising: a positive mandrel portion and a negative mandrel portion spaced apart from the positive mandrel portion, wherein at least one mandrel portion of the positive mandrel portion and the negative mandrel portion comprises: a connector element coupling portion configured for coupling the mandrel portion to a connector element, wherein the connector element coupling portion comprises a first conductive material, andan electrode coupling portion electrically coupled to the connector element coupling portion and configured for coupling the mandrel portion to an electrode, wherein the electrode coupling portion comprises a second conductive material,wherein at least a portion of the electrode coupling portion is positioned adjacent to at least a portion of the connector element coupling portion to mechanically couple the connector element coupling portion and the electrode coupling portion.