Housing for a conformal wearable battery
A molded housing may enclose an electronic component and include an electrically conductive contact component embedded within an exterior wall to conduct electricity between an interior and an exterior of the casing. The contact component may include two knurled areas separated by a recessed groove. The knurled areas and recessed groove may be coplanar with the exterior wall. The knurled areas and recessed groove may form an interface with the molded casing to seal the casing against ingress of liquid into the interior. The molded casing may include an upper housing and a lower housing formed from a combination of a rigid member and a flexible member. The rigid member may have a plurality of rigid regions, and the flexible member may have a plurality of flexible regions formed between neighboring rigid regions. The flexible member may be molded onto the rigid member using a two-shot injection molding process. In some examples, the contact component may be secured to a contact carrier, where the contact carrier is then secured to the exterior housing.
1. A conformal wearable battery comprising:
a plurality of battery cells arranged in a grid-like pattern, wherein the plurality of battery cells includes a positive terminal and a negative terminal to provide electricity through a transfer of electrons between the positive terminal and negative terminal; and
a housing that includes:
a first shell formed from a first member having a first plurality of rigid regions and a second member that has a first flexible region located between a first rigid region and a second rigid region of the first plurality of rigid regions, and wherein the first shell includes a front wall with an outward facing surface formed from outward facing surfaces of the first plurality of rigid regions and an outward facing surface of the second member,
wherein each rigid region of the first plurality of rigid regions is spaced apart from an adjacent rigid region, and is connected to the adjacent rigid region, by a channel on the first member, wherein the channel is visible along an inward facing surface of the front wall of the first shell; and
a second shell attached to the first shell, wherein the second shell includes a third member having a second plurality of rigid regions and a fourth member that has a second flexible region located between a first rigid region and a second rigid region of the second plurality of rigid regions, and wherein the second shell has an outward facing surface formed from outward facing surfaces of the second plurality of rigid regions and an outward facing surface of the second member;
wherein the first member is formed as a unitary member and the second member is joined to the first member,
wherein the first member is formed from a first material and the second member is formed from a second material, wherein the first material has a hardness that is greater than a hardness of the second material; and
wherein the first shell connects to the second shell to form an interior cavity that receives the plurality of battery cells.
2. The conformal wearable battery of claim 1 , wherein the third member is formed from the first material and the fourth member is formed from the second material.
3. The conformal wearable battery of claim 2 , wherein the first material comprises a polycarbonate, and the second material comprises a thermoplastic elastomer.
4. The conformal wearable battery of claim 1 , wherein the first rigid region of the first plurality of rigid regions includes a first outward facing surface, a first inward facing surface, and a first edge region along a majority of a perimeter of the first rigid region extending between the first outward facing surface and the first inward facing surface.
5. The housing of claim 4 , wherein the first edge region includes a first edge surface and a second edge surface, wherein the first edge surface and the second edge surface extend in different directions.
6. The housing of claim 5 , wherein the second member has a second edge region that has a complementary structure to the first edge region such that the first member and the second member are substantially coplanar on adjacent surfaces of the first edge region.
7. A housing for a plurality of battery cells arranged in a grid-like pattern, the housing comprising:
a first shell having a first member having a plurality of rigid regions and a second member that has a flexible region located between a first rigid region and a second rigid region of the plurality of rigid regions, and wherein a first wall of the first shell has an outward facing surface formed from outward facing surfaces of the plurality of rigid regions and an outward facing surface of the second member,
a second shell attached to the first shell forming an interior cavity between the first shell and the second shell,
wherein the first member is formed as a unitary member and the second member is joined to the first member, and
wherein the first member is formed from a first material and the second member is formed from a second material, wherein the first material having a first hardness and the second material has a second hardness, wherein the first hardness is greater than the second hardness; and
wherein each rigid region of the plurality of rigid regions is spaced apart from an adjacent rigid region, and is connected to the adjacent rigid region, by a channel on the first member, wherein the channel is visible along an inward facing surface of the first wall of the first shell.
8. The housing of claim 7 , wherein the plurality of rigid regions are arranged in an array with the plurality of rigid regions in both a horizontal direction and a vertical direction that correspond to the grid-like pattern of the plurality of battery cells.
9. The housing of claim 7 , wherein the channel acts as a living hinge.
10. The housing of claim 7 , wherein the channel has a thickness that is less than a thickness of the first rigid region.
11. The housing of claim 7 , wherein the first rigid region of the plurality of rigid regions includes a first outward facing surface, a first inward facing surface, and a first edge region along a majority of a perimeter of the first rigid region extending between the first outward facing surface and the first inward facing surface.
12. The housing of claim 11 , wherein the first edge region includes a first edge surface that extends substantially perpendicular to the first outward facing surface and a second edge surface has a portion that extends substantially perpendicular to the first edge surface.
13. The housing of claim 12 , wherein the second edge surface includes a curved portion.
14. The housing of claim 7 , wherein a thickness of the first rigid region is substantially the same as a thickness of the flexible region, wherein the thickness of the first rigid region is measured at a center of the first rigid region and the thickness of the flexible region is measured at a location adjacent a first edge region of the first rigid region.
15. The housing of claim 7 , wherein the second shell includes a third member having a second plurality of rigid regions and a fourth member that has a second flexible region located between a first rigid region and a second rigid region of the second plurality of rigid regions, and wherein a first wall of the second shell has an outward facing surface formed from outward facing surfaces of the plurality of rigid regions and an outward facing surface of the second member.
16. The housing of claim 7 , wherein the second member includes a plurality of horizontal grooves and a plurality of vertical grooves.
17. A housing for a plurality of battery cells arranged in a grid-like pattern, the housing comprising:
a first shell having a first member having a plurality of rigid regions and a second member that has a flexible region located between a first rigid region and a second rigid region of the plurality of rigid regions, and wherein a first wall of the first shell has an outward facing surface formed from outward facing surfaces of the plurality of rigid regions and an outward facing surface of the second member, wherein the plurality of rigid regions are arranged in an array with the plurality of rigid regions in both a horizontal direction and a vertical direction that correspond to the grid-like pattern of the plurality of battery cells and each rigid region of the plurality of rigid regions are spaced apart from an adjacent rigid region and is connected to the adjacent rigid region by a channel,
wherein the first member is formed as a unitary member and the second member is joined to the first member,
wherein the first member is formed from a first material and the second member is formed from a second material, wherein the first material having a first hardness and the second material has a second hardness, wherein the first hardness is greater than the second hardness; and
wherein each rigid region of the plurality of rigid regions is spaced apart from an adjacent rigid region, and is connected to the adjacent rigid region, by a channel on the first member, wherein the channel is visible along an inward facing surface of the first wall of the first shell.
18. The conformal wearable battery of claim 1 , wherein the first member and the second member are joined at an interface between the first rigid region of the first member and the first flexible region of the second member, wherein the first rigid region and the first flexible region have complementary edge regions that include substantially perpendicular surfaces on the first rigid region.