Method of producing an encapsulated battery cell
A method of producing an encapsulated battery cell ( 1 ), includes: a) braiding a battery cell ( 1 ′) with a fibre roving ( 8 ba ) to create a braid around the battery cell ( 1 ′); b) impregnating the braid with a resin material ( 8 ad ); and c) curing the resin material ( 8 ad ).
1 . A method of producing an encapsulated battery cell, comprising:
a. braiding a battery cell with a fibre roving to create a braid around the battery cell;
b. impregnating the braid with a resin material; and
c. curing the resin material.
2 . The method according to claim 1 , wherein a ceramic material is used for the fibre roving.
3 . The method according to claim 1 , wherein the fibre roving comprises a material having a strength retention of at least 50% at 800 degrees Celsius.
4 . The method according to claim 1 , wherein the fibre roving comprises a material having a thermal conductivity of at most 0.25 W/(m·K) at 800 degrees Celsius.
5 . The method according to claim 1 , wherein the fibre roving comprises a material with an expansion coefficient below 8 μm/(m*L).
6 . The method according to claim 1 , wherein the resin material comprises a fire-retardant material.
7 . The method according to claim 1 , wherein the braid is applied directly to an outer casing of the battery cell.
8 . The method according to claim 1 , wherein the braiding is carried out such that the braid protrudes at at least one end relative to the battery cell.
9 . The method according to claim 8 , wherein the braid is formed at said at least one end with a reduced dimension compared to a remainder of the braid.
10 . The method according to claim 8 , wherein the braid is formed at said at least one end with an opening toward the exterior.
11 . The method according to claim 1 , further comprising curing the resin material by Ultra Violet, UV, radiation or at a temperature of at most 80 degrees Celsius.
12 . The method according to claim 1 , wherein the resin material comprises an exothermic reactive material cured at a temperature of at most 80 degrees Celsius and is cured by a catalyst material.
13 . The method according to claim 1 , wherein a plurality of battery cells are arranged continuously one behind the other as a battery cell string, and the method includes continuously feeding the battery cell string to a braiding device, and the braiding device continuously provides the battery cells with said braid as a continuous braid.
14 . The method according to claim 13 , further comprising placing a spacer material between adjacent ones of the battery cells in the string prior to feeding said battery cell string to the braiding device.
15 . The method according to claim 13 , further comprising feeding the battery cells to the braiding device through a tubular feed, with said feed being cut obliquely to a course thereof, whereby the battery cell string is already provided with the braiding on one side, while the battery cell string is still supported by the tubular feed on another side.
16 . The method according to claim 13 , wherein the battery cell string together with the braid is passed through a first bath with the resin material and then through a second bath with a catalyst material, an Ultra Violet, UV, irradiation device, or a temperature curing device to cure the resin material.
17 . The method according to claim 13 , further comprising cutting the battery cell string to length between the individual battery cells using a cutting device.
18 . An encapsulated battery cell formed by the method according to claim 1 .