Co-molded components of a redox flow battery stack
A cell plate assembly of a redox flow battery has a frame body and a cell plate in fluidic communication. Cell plates, electrolyte pathways and other components of the frame plate assembly may be overmolded inside a frame. Plates, frames and tubes may all be robustly sealed. One piece bonded plug and frames enable reduced use of O-rings and other wear items.
1. A frame plate assembly comprising:
a frame having a frame body made of frame body material;
a plurality of electrolyte pathways disposed within the body;
a plurality of joining members, wherein the plurality of electrolyte pathways couple to a cell plate via the joining members, which are configured to extend at least partially within the plurality of electrolyte pathways and to fluidically couple the plurality of electrolyte pathways to the cell plate;
the cell plate having a front face, wherein at least a portion of the front face has been overmolded with the frame body material such that an overmolding frame body material covers the plurality of joining members and at least a portion of the front face and couples to the frame body; and
wherein the overmolding frame body material forms a seal between the cell plate and the plurality of the electrolyte pathways.
2. The frame assembly of claim 1 , wherein the portion is defined by a perimeter of the front face of the cell plate.
3. The frame plate assembly of claim 1 , wherein the electrolyte pathways are a tubular shape.
4. The frame plate assembly of claim 1 , wherein the overmolding frame body material allows the cell plate to rotate by at least 1 degree about an axis independently from the frame of the frame plate assembly.
5. The frame plate assembly of claim 1 , wherein the cell plate is more rigid than the overmolding frame body material.
6. The frame plate assembly of claim 1 , further comprising a cell plate flatness of 0.0005 millimeters per linear inch; and a frame plate flatness of 0.0005 inches per linear inch.
7. The frame plate assembly of claim 3 , wherein each joining member comprises a tubular member configured as a nipple or configured as a press fit, a snap fit or a threaded connection.
8. The frame plate assembly of claim 7 , wherein each joining member resiliently engages with the cell plate.
9. The frame plate assembly of claim 7 , wherein the cell plate includes a plurality of receiving elements configured to receive the tubular joining member.
10. The frame plate assembly of claim 3 , wherein each joining member comprises tubing configured as a nipple having one or more flanges extending radially out from the tubing, the one or more flanges configured to resiliently engage with an inner surface of an orifice of a cell plate.
11. The frame plate assembly of claim 10 , wherein each joining member includes plural flanges configured to be received by at least one corresponding ridge in an orifice of the cell plate.
12. The frame plate assembly of claim 7 , wherein each joining member includes a threaded surface configured to be received in corresponding threads of an inner annular surface of an electrolyte pathway of the cell plate.
13. The frame plate assembly of claim 3 , wherein the plurality of joining members are incorporated into the cell end of the plurality of electrolyte pathways.