Battery shell having a reinforcing nonwoven, method of production, and traction battery
A battery shell includes a reinforcing nonwoven with long fibers and a polymer matrix.
1 . A battery shell of a traction battery, the battery shell comprising:
a bottom and side walls,
an inner side, and
an outer side, characterized in that the battery shell has a reinforcing nonwoven of long fibers and a polymer matrix,
wherein the battery shell is formed by a plunge edge mold.
2 . The battery shell according to claim 1 , characterized in that the long fibers have a length between 0.5 mm and 20 mm.
3 . The battery shell according to claim 1 , characterized in that the battery shell has a fiber volume fraction greater than or equal to 20%.
4 . The battery shell according to claim 1 , characterized in that the polymer matrix is a thermoplastic material.
5 . The battery shell according to claim 1 , characterized in that the long fibers have a glass fiber and/or a carbon fiber and/or an aramid fiber.
6 . The battery shell according to claim 1 , characterized in that the battery shell has a metal insert for fastening the battery shell.
7 . The battery shell according to claim 1 , characterized in that at least one side wall of the battery shell has a deviating height.
8 . A method of production of the battery shell of claim 1 , wherein the method comprises the following steps:
forming the battery shell from a preform having the reinforcing nonwoven using a plunge edge mold having a cavity; and
demolding the battery shell.
9 . The method according to claim 8 , characterized in that a molding compound for the preform is provided by mixing a molten thermoplastic material with long fibers.
10 . The method according to claim 8 , characterized in that, prior to forming the battery shell, the preform is formed by an extruder nozzle and/or introduced into the plunge edge mold.
11 . The method according to claim 10 , characterized in that the extruder nozzle is a wide slot nozzle.
12 . The method according to claim 10 , characterized in that the cavity of the plunge edge mold has a variable volume.
13 . The method according to claim 8 , characterized in that an insert is introduced into the cavity before the battery shell is formed.
14 . The method according to claim 8 , characterized in that, prior to forming the battery shell, a metal insert for fastening the battery shell is introduced into the cavity.
15 . A traction battery having a battery shell according to claim 1 .
16 . The battery shell according to claim 1 , characterized in that the polymer matrix is made of a polypropylene, PA6 or PA6.6.
17 . The battery shell according to claim 6 , wherein the metal insert has an internal thread.
18 . The method of claim 14 , wherein the metal insert is brought into an operative connection with a holding device in the cavity when introduced into the cavity.
19 . The battery shell of claim 1 , wherein the plunge edge mold has at least partially circumferential plunge edges for guiding a core of the mold and/or for sealing a cavity of the mold.
20 . The battery shell of claim 19 , wherein the plunge edges extend in a direction in which the plunge edge mold can be opened and closed.