Battery pack

Abstract

A battery pack assembly includes a housing, a battery cell assembly, and a fan. The housing having a plurality of sides and defining an internal cavity. The battery cell assembly positioned in the internal cavity. The battery cell assembly includes a plurality of battery cells and a frame supporting the battery cells. The frame includes a first support member, a second support member, and a plurality of leg members connecting the first support member and the second support member. The first support member and the second support member each has a body extending between a first edge and a second edge opposite the first edge. The body defines a plurality of openings configured to align with one of the battery cells. The fan is configured to circulate air within the housing and through the battery cell assembly.

1 .- 44 . (canceled) 
     
     
         45 . A battery pack assembly comprising:
 a housing; and   one or more plurality of battery cell assemblies received in the housing, each of the one or more plurality of battery cell assemblies including:
 a frame at least partially defining an internal cavity therewithin, 
 a plurality of battery cells positioned in the internal cavity, and 
 a heat sink including a body having a first side and a second side opposite the first side, a plurality of fins extending from the first side, and a plurality of projections extending from the second side, the fins being external to the internal cavity, and the plurality of projections positioned within the internal cavity, 
 wherein the projections are positioned between the battery cells such that the battery cells and the projections are sequentially arranged within the internal cavity in at least one direction. 
   
     
     
         46 . The battery pack assembly of  claim 45 , where one or more of the projections includes a channel extending partially therethrough, and wherein each of the one or more plurality of battery cell assemblies further includes a heating rod received in each of the channels. 
     
     
         47 . The battery pack assembly of  claim 46 , wherein the body of the heat sink includes a plurality of openings, wherein each opening is connected to one of the channels, and wherein the heating rod is inserted through the respective opening into the channel. 
     
     
         48 . The battery pack assembly of  claim 47 , wherein each of the openings are positioned between some of the plurality of fins on the first side of the body of the heat sink. 
     
     
         49 . The battery pack assembly of  claim 47 , wherein an end of each heating rod is positioned external to the respective aligned channel and opening. 
     
     
         50 . The battery pack assembly of  claim 45 , wherein each of the one or more plurality of battery cell assemblies includes adhesive material positioned in the internal cavity, wherein the adhesive material contacts the projections and the battery cells, and wherein the adhesive material is thermally conductive to facilitate heat transfer between the battery cells and the projections. 
     
     
         51 . The battery pack assembly of  claim 45 , wherein each of the plurality of projections extends from the second side of the body to an end, wherein each of the plurality of projections extends parallel to each of the battery cells, and wherein the end of each of the projections is positioned adjacent an end of one of the battery cells. 
     
     
         52 . The battery pack assembly of  claim 45 , wherein the frame includes a plurality of support members, each support member positioned between a battery cell and an adjacent one of the plurality of projections, wherein each of the support members is configured to locate one of the battery cells and one of the projections in the internal cavity. 
     
     
         53 . The battery pack assembly of  claim 45 , further comprising a fan assembly positioned within the housing and proximate one of the one or more battery cell assemblies, wherein the fan assembly is operable to direct airflow past the fins of the one or more plurality of battery cell assemblies. 
     
     
         54 . The battery pack assembly of  claim 45 , further comprising a cover coupled to the frame, wherein the frame, the cover, and the second side of the body of the heat sink cooperatively define the internal cavity. 
     
     
         55 . The battery pack assembly of  claim 45 , further comprising a plurality of connectors supported by the frame, each of the connectors connected to two or more of the battery cells. 
     
     
         56 . A battery pack assembly comprising:
 a housing; and   one or more plurality of battery cell assemblies received in the housing, each of the one or more plurality of battery cell assemblies including:
 a frame at least partially defining an internal cavity therewithin, 
 a plurality of battery cells positioned in the internal cavity, 
 a heat sink including a body having a first side and a second side opposite the first side, and a plurality of projections extending from the second side, the first side being external to the internal cavity, the plurality of projections positioned within the internal cavity, and one or more of the projections including a channel extending partially therethrough, and 
 a plurality of heating rods, each heating rod received in one of the channels, wherein the projections are positioned between the battery cells such that the battery cells and the projections are sequentially arranged within the internal cavity. 
   
     
     
         57 . The battery pack assembly of  claim 56 , wherein one or more of the projections includes a channel extending partially therethrough, and wherein each of the one or more plurality of battery cell assemblies further includes a heating rod received in each of the channels. 
     
     
         58 . The battery pack assembly of  claim 57 , wherein the body of the heat sink includes a plurality of openings, wherein each opening is connected to one of the channels, and wherein the heating rod is inserted through the respective opening into the channel. 
     
     
         59 . The battery pack assembly of  claim 56 , wherein each of the one or more plurality of battery cell assemblies includes adhesive material positioned in the internal cavity, wherein the adhesive material contacts the projections and the battery cells, and wherein the adhesive material is thermally conductive to facilitate heat transfer between the battery cells and the projections. 
     
     
         60 . The battery pack assembly of  claim 56 , wherein each of the plurality of projections extends from the second side of the body to an end, wherein each of the plurality of projections extends parallel to each of the battery cells, and wherein the end of each of the projections is positioned adjacent an end of one of the battery cells. 
     
     
         61 . The battery pack assembly of  claim 56 , further comprising a cover coupled to the frame, wherein the frame, the cover, and the second side of the body of the heat sink cooperatively define the internal cavity. 
     
     
         62 . A battery cell assembly for a battery pack, the battery cell assembly comprising:
 a frame at least partially defining an internal cavity therewithin;   a plurality of battery cells positioned in the internal cavity; and   a heat sink including a body having a first side and a second side opposite the first side, a plurality of fins extending from the first side, and a plurality of projections extending from the second side, the fins being external to the internal cavity, and the plurality of projections positioned within the internal cavity, one or more of the projections including a channel extending partially therethrough,   wherein the projections are positioned between the battery cells such that the battery cells and the projections are sequentially arranged within the internal cavity.   
     
     
         63 . The battery cell assembly of  claim 62 , further comprising one or more heating rods, each of the one or more heating rods received in one of the channels. 
     
     
         64 . The battery cell assembly of  claim 62 , further comprising adhesive material positioned in the internal cavity, wherein the adhesive material contacts the projections and the battery cells, and wherein the adhesive material is thermally conductive to facilitate heat transfer between the battery cells and the projections. 
     
     
         65 .- 84 . (canceled)