Contact plate including at least one bonding connector configured to establish electrical bonds to terminals of at least one group of battery cells in a battery module
Embodiments are directed to contact plates configured to establish electrical bonds between battery cells in a battery module. In a first embodiment, the contact plate includes at least one primary conductive layer including a hole that is aligned with two or more terminals of two or more battery cells in a group of battery cells that are configured to be connected in parallel with each other, and a bonding connector configured to provide direct electrical bonds between the contact plate and the two or more terminals of the two or more battery cells. In a second embodiment, a contact plate includes at least one primary conductive layer and a set of bonding connectors made from at least one material that is selected to match at least one material used for the terminals of the at least one group of battery cells.
1. A contact plate configured to establish electrical bonds between battery cells in a battery module, comprising:
at least one primary conductive layer including a contact area that is aligned with two or more terminals of two or more battery cells in a parallel group of battery cells (P-Group); and
a bonding connector configured to provide an electrical coupling between the contact plate and the two or more terminals of the two or more battery cells.
2. The contact plate of claim 1 , wherein the at least one primary conductive layer includes a single-layer busbar.
3. The contact plate of claim 1 , wherein the two or more terminals correspond to two or more negative terminals of the two or more battery cells.
4. The contact plate of claim 3 ,
wherein the two or more battery cells are adjacent to each other,
wherein the two or more negative terminals correspond to two or more negative cell rims of the two or more battery cells, and
wherein the bonding connector is configured to be pressed down and welded onto a region that includes portions from each of the two or more negative cell rims to form the electrical coupling.
5. The contact plate of claim 1 , wherein the bonding connector is welded directly to the two or more terminals.
6. The contact plate of claim 1 , further comprising:
a cell terminal connection layer that is joined in part with the at least one primary conductive layer,
wherein the bonding connector corresponds to a section of the cell terminal connection layer that is not joined with the at least one primary conductive layer.
7. The contact plate of claim 6 ,
wherein the at least one primary conductive layer comprises two primary conductive layers that partially sandwich the cell terminal connection layer, and
wherein the bonding connector corresponds to a non-sandwiched part of the cell terminal connection layer.
8. The contact plate of claim 1 ,
wherein the at least one primary conductive layer includes a first material with a first conductivity, and
wherein the bonding connector comprises a second material with a second conductivity that is less than the first conductivity.
9. The contact plate of claim 8 ,
wherein the first material comprises aluminum or copper, and
wherein the second material comprises steel or aluminum.
10. The contact plate of claim 1 , wherein the contact area corresponds to a sidewall of the at least one primary conductive layer.
11. The contact plate of claim 10 , wherein the sidewall is defined by a hole in the at least one primary conductive layer.
12. The contact plate of claim 1 , wherein the contact area is on a top of the contact plate.
13. The contact plate of claim 12 , wherein the at least one primary conductive layer includes a groove on the top of the contact plate into which the bonding connector is inserted.
14. The contact plate of claim 1 , further comprising:
another bonding connector configured to provide an electrical coupling between the contact plate and at least one terminal of at least one battery cell of another P-Group that is connected in series with the P-Group.
15. The contact plate of claim 1 , wherein the bonding connector is homogeneously configured with a single material.
16. The contact plate of claim 15 , wherein the single material comprises steel or aluminum.