Battery assembly processes
A manufacturing process flow and accompanying methods for assembling a battery module are designed to increase efficiency, reduce a footprint of the manufacturing process, reduce manufacturing time, allow for increased flexibility, and reduce costs. The process flow takes advantage of robotic functionality to combine multiple manufacturing and quality assurance operations.
1. A method for assembly of a battery module, comprising:
obtaining a battery module shell;
placing a plurality of battery cells in the battery module shell;
electrically coupling the battery cells; and
electrically coupling a control circuit to the battery cells wherein electrically coupling the battery cells comprises coupling a single flexible circuit to all of the plurality of battery cells;
wherein each of the plurality of battery cells comprises a positive electrode and a negative electrode, and coupling the flexible circuit to the plurality of battery cells comprises coupling the flexible circuit to each positive electrode and each negative electrode; and
wherein the plurality of battery cells are arranged in rows, and the flexible circuit is coupled to each positive electrode and each negative electrode in each row simultaneously.
2. The method of claim 1 , wherein the battery module comprises a first half having a first opening and a second half having a second opening opposite the first opening.
3. The method of claim 2 , further comprising placing a first plurality of battery cells in the first half and a second plurality of battery cells in the second half.
4. The method of claim 3 , further comprising electrically coupling the first plurality of battery cells and electrically coupling the second plurality of battery cells.
5. The method of claim 4 , further comprising electrically coupling the first plurality of battery cells to the second plurality of battery cells.
6. A method for assembly of a battery module, comprising:
obtaining a battery module shell for containing battery cells, the module shell having a retainer plate with rows of openings adapted to at least partially receive battery cells therein;
arranging battery cells into rows corresponding to the rows of openings in the retainer plate;
robotically grasping at least one row of battery cells and placing the battery cells into at least one row of openings in the retainer plate while simultaneously electrically testing each battery cell;
electrically coupling the battery cells in the module shell;
electrically coupling a control circuit to the battery cells; coupling each of the battery cells to the retainer plate; and
coating at least a portion of each opening in the retainer plate with an adhesive accelerator prior to placing the battery cells into the openings,
wherein coupling each of the battery cells to the retainer plate comprises placing an adhesive on each of the battery cells prior to placing the battery cells into the openings in the retainer plate.
7. A method for assembly of a battery module, comprising:
obtaining a battery module shell for containing battery cells, the module shell having a retainer plate with rows of openings adapted to at least partially receive battery cells therein;
arranging battery cells into rows corresponding to the rows of openings in the retainer plate, the batteries having an electrode end and a non-electrode end;
robotically grasping at least one row of battery cells at the electrode end and performing the following steps while continuing to grasp the battery cells:
electrically testing each battery cell;
placing an adhesive on the non-electrode end of each battery cell;
placing the non-electrode end of the battery cells into the openings in the retainer plate such that the adhesive contacts the retainer plate;
electrically coupling the battery cells in the module shell; and
electrically coupling a control circuit to the battery cells;
wherein electrically coupling the battery cells comprises coupling a single flexible circuit to the battery cells.
8. The method of claim 7 , wherein placing the adhesive on the non-electrode end of each battery cell comprises placing a designated amount of the adhesive in a ring-shaped pattern on the non-electrode end.
9. The method of claim 8 , further comprising applying a force to the battery cell when placing the non-electrode end of the battery cell into the opening in the retainer plate and causing the adhesive to flow.
10. The method of claim 9 , wherein causing the adhesive to flow comprises causing the adhesive to coat a portion of the non-electrode end of the battery but leaving a central portion of the non-electrode end uncovered with adhesive.
11. The method of claim 7 , wherein each of the electrode ends of the battery cells comprises a positive electrode and a negative electrode, and coupling the flexible circuit to the battery cells comprises coupling the flexible circuit to each positive electrode and each negative electrode.
12. The method of claim 7 , wherein coupling the flexible circuit to each positive electrode and each negative electrode comprises laser welding the flexible circuit to each positive electrode and to each negative electrode.
13. The method of claim 7 , further comprising joining multiple battery modules together to form a battery string.