Finger-proof battery module bus bar connector assembly
A bus bar assembly includes, among other things, a nonconductive terminal cap that is configured to at least partially surround an electrically conductive terminal. The terminal cap has a perimeter wall that is configured to circumscribe at least a portion of the terminal to provide a gap that is configured to expose the terminal. The terminal cap includes a first attachment feature. The terminal cap also includes a bus bar that has an end that is configured to mechanically and electrically engage the terminal in an assembled condition. The terminal cap further includes a nonconductive shroud that encloses the bus bar. The shroud includes a second attachment feature that is configured to removably engage the first attachment feature in the assembled condition to secure the shroud to the terminal cap.
1. A battery module, comprising:
a first battery cell having an electrically conductive first male terminal;
a second battery cell having an electrically conductive second male terminal;
nonconductive first and second terminal caps configured to at least partially surround the first and second male terminals, the first and second terminal cap each having a perimeter wall configured to circumscribe at least a portion of the first and second male terminals to provide a gap exposing the first and second male terminals, the first and second terminal cap each include a first attachment feature;
a bus bar having a first female terminal arranged on a first end of the bus bar and a second female terminal arranged at a second end of the bus bar, wherein the first female terminal encloses three sides of the first end and the second female terminal encloses three sides of the second end, wherein the first and second female terminals receive the first and second male terminals through openings proximate a fourth side of the first and seconds ends, respectively, when in an assembled condition, wherein the first end is laterally offset from the second end such that the first end of the bus bar is in direct contact with one side of the first male terminal and the second end of the bus bar is in direct contact with an opposite side of the second male terminal; and
a nonconductive shroud enclosing the bus bar, wherein the shroud includes second attachment features removably engaging the first attachment feature of the first and second terminal caps in the assembled condition to secure the shroud to the first and second terminal caps.
2. The battery module of claim 1 , wherein the first and second terminal caps each have a post arranged interiorly of the perimeter wall, wherein the first and second male terminals terminal each have a perimeter edge bounding opposing faces of the first and second male terminals, and wherein the posts receive the first and second terminals and surround the perimeter edge leaving the opposing faces exposed.
3. The battery module of claim 2 , wherein the perimeter wall extends beyond the post, and the posts extends beyond the first and second male terminals and wherein the perimeter wall and the post cooperating to render the gap as finger-proof per code IP2XB of International Electrotechnical Commission (IEC) Standard 60529.
4. The battery module of claim 1 , wherein one of the first and second attachment features is a cantilevered beam defining a slot, and the other of the first and second attachment features is a protrusion, the protrusion interlocking within the slot in the assembled condition.
5. The battery module of claim 1 , wherein the shroud includes multiple shroud portions cooperating with one another to enclose the bus bar, the multiple shroud portions include first and second shroud portions nested relative to one another in an overlapping relationship.
6. The battery module of claim 1 , wherein each perimeter wall has a U-shape arranged on at least three sides of the first or second terminals.
7. The battery module of claim 1 , wherein the gap in the first terminal cap and the gap in the second terminal cap are arranged on opposite sides of the first and second male terminals.
8. The battery module of claim 2 , wherein the gap is provided between the post and the perimeter wall.
9. The battery module of claim 2 , wherein the bus bar is in direct contact with one of the opposing faces of the first or second male terminal and the first or second female terminal is in direct contact with the opposite opposing face of the first or second male terminal.
10. The battery module of claim 1 , wherein the first and second female terminals are arranged laterally offset from one another.
11. The battery module of claim 10 , wherein the first and second ends of the bus bar are arranged parallel to one another.
12. The battery module of claim 11 , wherein the bus bar defines two equal oblique angles between the first and second ends of the bus bars.