Method for producing a battery module and battery module
The invention relates to a method for producing a battery module having a plurality of prismatic battery cells ( 2, 20 ) which are arranged next to one another in a longitudinal direction ( 4 ) of the battery module ( 1 ) and in particular are additionally braced with one another, wherein the plurality of battery cells ( 2 ) are furthermore received in an interior ( 30 ) of a housing ( 3 ) of the battery module ( 1 ), wherein the plurality of battery cells ( 2, 20 ) are positioned in the housing ( 3 ) prior to the curing of an adhesive which is positioned in each case between a bottom surface ( 31 ) of the housing ( 3 ) of the battery module ( 1 ) and a bottom surface ( 21 ) of the battery cells ( 2 ), and in particular is fixed until the adhesive cures.
1 . A method for producing a battery module having a plurality of prismatic battery cells ( 2 , 20 ), which are arranged next to one another in a longitudinal direction ( 4 ) of the battery module ( 1 ), the method comprising:
positioning the plurality of prismatic battery cells ( 2 ) in an interior ( 30 ) of a housing ( 3 ) of the battery module ( 1 ),
inserting two compressing elements ( 11 ) arranged on a same longitudinal end of the battery module ( 1 ) between the housing ( 3 ) and a single end-most prismatic battery cell ( 2 ) of the plurality of prismatic battery cells ( 2 ), the two compressing elements ( 11 ) being separated from one another to provide an air gap therebetween in a direction perpendicular to the longitudinal direction and therefore also creating an air gap between the housing ( 3 ) and the single end-most prismatic battery cell ( 2 ) adjacent the two compressing elements ( 11 ), the two compressing elements ( 11 ) further being independently insertable into the battery module such that the two compressing elements can be inserted to different extents,
curing an adhesive, which is positioned in each case between a bottom surface ( 31 ) of the housing ( 3 ) of the battery module ( 1 ) and a bottom surface ( 21 ) of the plurality of prismatic battery cells ( 2 ), after positioning the plurality of prismatic battery cells ( 2 , 20 ) in the housing ( 3 ).
2 . The method according to claim 1 , said compressing elements ( 11 ) tapering perpendicularly to the longitudinal direction ( 4 ) of the battery module ( 1 ) in a direction of the bottom surface ( 31 ) of the housing ( 3 ).
3 . The method according to claim 2 , wherein the compressing element ( 11 ) is formed from a polymeric material.
4 . The method according to claim 1 , wherein the two compressing elements ( 11 ) are received in a form-fitting manner in a receptacle ( 153 ) of the housing ( 3 ) of the battery module ( 1 ).
5 . The method according to claim 1 , further comprising arranging a supporting element ( 12 ) between the housing ( 3 ) of the battery module ( 1 ) and the plurality of prismatic battery cells ( 2 ) opposite the two compressing elements ( 11 ) in the longitudinal direction ( 4 ) of the battery module ( 1 ).
6 . The method according to claim 5 , wherein the supporting element ( 12 ) comprises an opening ( 123 ) and contact surfaces ( 121 , 122 ).
7 . The method according to claim 5 , further comprising connecting the supporting element ( 12 ) in a form-fitting or cohesive manner to an end plate ( 5 ) or to the housing ( 3 ).
8 . The method according to claim 5 , wherein the supporting element ( 12 ) is formed from a polymeric material.
9 . The method according to claim 1 , wherein the housing ( 3 ) comprises a temperature-control element ( 13 ) directly adjacent to the bottom surfaces ( 21 ) of the plurality of prismatic battery cells ( 2 ).
10 . The method according to claim 1 , further comprising bracing the plurality of prismatic battery cells ( 2 ) between two end plates ( 5 ) by way of at least one clamping element ( 6 ).
11 . The method according to claim 10 , further comprising arranging an adhesive ( 8 ) between a side surface ( 23 ) of the plurality of prismatic battery cells ( 2 ) and the clamping element ( 6 ).
12 . The method according claim 1 , further comprising arranging a respective spacer element ( 9 ) between two battery cells of the plurality of prismatic battery cells ( 2 ) arranged adjacent to one another.
13 . A method for producing a battery module having a plurality of prismatic lithium-ion battery cells ( 200 ), which are arranged next to one another in a longitudinal direction ( 4 ) of the battery module ( 1 ) and are additionally braced with one another, the method comprising:
positioning the plurality of prismatic lithium-ion battery cells ( 2 ) in an interior ( 30 ) of a housing ( 3 ) of the battery module ( 1 ),
inserting two compressing elements ( 11 ) arranged on a same longitudinal end of the battery module ( 1 ) between the housing ( 3 ) and a single end-most prismatic lithium-ion battery cell ( 2 ) of the plurality of prismatic lithium-ion battery cells ( 2 ), the two compressing elements ( 11 ) being separated from one another to provide an air gap therebetween in a direction perpendicular to the longitudinal direction and therefore also creating an air gap between the housing ( 3 ) and the single end-most prismatic lithium-ion battery cell ( 2 ) adjacent the two compressing elements ( 11 ), the two compressing elements ( 11 ) further being independently insertable into the battery module such that the two compressing elements can be inserted to different extents,
curing an adhesive, which is positioned in each case between a bottom surface ( 31 ) of the housing ( 3 ) of the battery module ( 1 ) and a bottom surface ( 21 ) of the prismatic lithium-ion battery cells ( 2 ), after positioning the plurality of prismatic lithium-ion battery cells ( 2 , 20 ) in the housing ( 3 ).
14 . The method according to claim 13 , said compressing elements ( 11 ) tapering perpendicularly to the longitudinal direction ( 4 ) of the battery module ( 1 ) in a direction of the bottom surface ( 31 ) of the housing ( 3 ) and having two contact surfaces ( 111 , 112 ) which are arranged at an angle ( 113 ) of at least four degrees with respect to one another.
15 . The method according to claim 13 , wherein the two compressing elements ( 11 ) are received in a form-fitting manner in a receptacle ( 153 ) of the housing ( 3 ) of the battery module ( 1 ), wherein the receptacle ( 153 ) forms an angle ( 154 ) of at least four degrees with respect to a vertical direction ( 41 ) of the battery module ( 1 ) arranged perpendicularly to the longitudinal direction ( 4 ).
16 . The method according to claim 13 , further comprising arranging a supporting element ( 12 ) between the housing ( 3 ) of the battery module ( 1 ) and the plurality of prismatic lithium-ion battery cells ( 2 ) opposite the two compressing elements ( 11 ) in the longitudinal direction ( 4 ) of the battery module ( 1 ).
17 . The method according to claim 16 , wherein the supporting element ( 12 ) comprises an opening ( 123 ) and contact surfaces ( 121 , 122 ).
18 . The method according to claim 13 , wherein the housing ( 3 ) comprises a temperature-control element ( 13 ) which is directly adjacent to the bottom surfaces ( 21 ) of the prismatic lithium-ion battery cells ( 2 ) and which is in the form of a temperature-control chamber through which temperature-control fluid can flow.
19 . The method according to claim 13 , bracing the plurality of prismatic lithium-ion battery cells ( 2 ) between two end plates ( 5 ) by way of at least one clamping band ( 60 ), wherein the at least one clamping band ( 60 ) is cohesively connected to the end plates ( 5 ) in a welded manner.
20 . The method according to claim 19 , further comprising arranging an adhesive ( 8 ) between a side surface ( 23 ) of a battery cell of the plurality of prismatic lithium-ion battery cells ( 2 ) and a clamping element ( 6 ), wherein the adhesive ( 8 ) furthermore has thermally conductive additives.