Battery module including a heat pipe positioned in proximity to a terminal component at a positive or negative terminal of the battery module
An embodiment is directed to a battery module, including a plurality of battery cell groups that are connected in series with each other, each of the plurality of battery cell groups including a plurality of battery cells that are connected to each other in parallel, a first terminal component at a first terminal of the battery module, the first terminal corresponding to either a positive terminal of the battery module or a negative terminal of the battery module, and a first heat pipe positioned in proximity to the first terminal component and configured to transfer heat away from the first terminal component.
1. A battery module, comprising:
a plurality of battery cell groups that are connected in series with each other, each of the plurality of battery cell groups including a plurality of battery cells that are connected to each other in parallel;
a contact plate that is connected to one of the plurality of battery cell groups at a terminal of the battery module, the terminal corresponding to either a positive terminal of the battery module or a negative terminal of the battery module, wherein a positive or negative high-voltage (HV) connector protrudes out of the battery module, and wherein the HV connector is integrated as part of the contact plate or is directly coupled to the contact plate;
a cooling plate integrated into the battery module and configured to be cooled by an external liquid cooling system; and
a heat pipe coupled to the contact plate in proximity to the HV connector of the contact plate and configured to transfer heat away from the HV connector and towards the cooling plate.
2. The battery module of claim 1 , further comprising:
a layer of thermally conductive and electrically insulative material arranged between the contact plate and the heat pipe, such that the heat pipe and the contact plate are not directly coupled,
wherein the layer of thermally conductive and electrically insulative material facilitates heat to be transferred from the contact plate to the heat pipe while mitigating electricity from being transferred from the contact plate to the heat pipe.
3. The battery module of claim 2 , wherein the layer of thermally conductive and electrically insulative material includes insulation foil.
4. The battery module of claim 3 , wherein the insulation foil includes Kapton foil, ceramic insulation, anodized aluminum, or a combination thereof.
5. The battery module of claim 2 , further comprising:
a gap filler layer positioned between the layer of thermally conductive and electrically insulative material and the first heat pipe.
6. The battery module of claim 1 , wherein the contact plate includes a set of bonding connectors that establish direct electrical bonds with positive or negative terminals of one of the plurality of battery cell groups.
7. The battery module of claim 1 , wherein the heat pipe is positioned in proximity to a thickest portion of the contact plate that is associated with a highest current expectation across the contact plate.
8. The battery module of claim 1 , wherein the HV connector is configured to plug into an external component that is separate from the battery module.
9. The battery module of claim 1 ,
wherein the contact plate is arranged on a first vertical side of the plurality of battery cell groups,
wherein the cooling plate is arranged on a horizontal side of the plurality of battery cell groups that is underneath the HV connector and also on a second vertical side of the plurality of battery cell groups that is opposite the first vertical side, and
wherein the heat pipe is configured to transfer heat away from the contact plate and towards the cooling plate on the horizontal side.
10. The battery module of claim 1 , wherein the cooling plate is arranged on an opposite side of the plurality of battery cells relative to the contact plate.