VENTING AND FILTERING COMPONENTS FOR ENCAPSULATED THERMAL BARRIERS
The present disclosure relates to materials and systems to manage thermal runaway issues in energy storage systems. Exemplary embodiments include an insulation layer that is encapsulated to form an insulation barrier. A particle capture layer is included in the insulation barrier. The particle capture layer captures particles released from the insulation barrier during compression of the insulation barrier.
1 . An insulation barrier for use in an electrical energy storage system, the insulation barrier comprising:
at least one insulation layer;
an encapsulation layer at least partially surrounding the insulation layer, the encapsulation layer comprising one or more openings; and
a particle capture layer coupled to the encapsulation layer and positioned between the at least one insulation layer and the encapsulation layer;
wherein particles and gas produced during compression of the insulation barrier flow toward the one or more openings of the encapsulation layer and wherein the particles are at least partially retained within the particle capture layer.
2 . The insulation barrier of claim 1 , wherein the particle capture layer is positioned on an exterior surface of the encapsulation layer over the one or more openings, and wherein particles produced during compression of the insulation barrier pass through the one or more openings of the encapsulation layer and are at least partially retained within the particle capture layer.
3 . The insulation barrier of claim 2 , wherein the encapsulation layer comprises an elongated opening, and wherein the encapsulation layer partially covers the insulation layer such that the elongated opening in the encapsulation layer is positioned along a side of the insulation layer, and wherein the particle capture layer is coupled to the encapsulation layer such that the particle capture layer is positioned over the elongated opening in the encapsulation layer.
4 . The insulation barrier of claim 2 , wherein the encapsulation layer comprises a plurality of openings positioned along one or more sides of the insulation layer, and wherein the particle capture layer is coupled to the encapsulation layer such that the particle capture layer is positioned over the plurality of openings in the encapsulation layer.
5 . The insulation barrier of claim 3 , wherein the particle capture layer is coupled to the encapsulation layer by an adhesive material.
6 . The insulation barrier of claim 5 , wherein the adhesive material is positioned proximate to the opening such that the adhesive material acts as a barrier to the flow of the particles and gas directing the particles and gas into the particle capture layer.
7 . The insulation barrier of claim 1 , wherein the particle capture layer is positioned inside of the encapsulation layer, and wherein, during use, particles and gasses produced during compression of the insulation barrier pass into the particle capture layer before passing through the one or more openings of the encapsulation layer and are at least partially retained within the particle capture layer.
8 . The insulation barrier of claim 1 , wherein the particle capture layer comprises a foam material.
9 . The insulation barrier of claim 1 , wherein the particle capture layer comprises a woven material, a non-woven material, or a webbed material.
10 . The insulation barrier of claim 1 , further comprising one or more polymer films coupled to the particle capture layer, wherein the polymer films inhibit and/or capture particles during compression of the insulation barrier.
11 . The insulation barrier of claim 10 , wherein one or more of the polymer films are in the form of a filter that inhibits the flow of particles through the polymer film and allows the passage of gases through polymer film.
12 . The insulation barrier of claim 10 , wherein one of the polymer films covers a portion of the particle capture layer opposite the insulation layer.
13 . The insulation barrier of claim 10 , wherein one of the polymer films covers a portion of the insulation layer and the particle capture layer.
14 . The insulation barrier of claim 1 , wherein the insulation layer has a thermal conductivity through a thickness dimension of said insulation layer of less than about 50 mW/m-K at 25° C. and less than about 60 mW/m-K at 600° C.
15 . The insulation barrier of claim 1 , wherein the insulation layer comprises an aerogel.
16 . The insulation barrier of claim 1 , wherein the encapsulation layer comprises a polymeric material.
17 . The insulation barrier of claim 14 , wherein the encapsulation layer comprises a polymeric material and a metal layer embedded in the polymeric material.
18 . A battery module comprising:
a plurality of battery cells, and
one or more insulation barriers according to claim 17 ;, wherein at least one insulation barrier is disposed between adjacent battery cells.
19 . An electrical power system comprising one or more battery modules as described in claim 18 .
20 . A device or vehicle comprising a battery module according to claim 18 .
21 . The device of claim 20 , wherein said device is a laptop computer, PDA, mobile phone, tag scanner, audio device, video device, display panel, video camera, digital camera, desktop computers, military portable computers, military phones, laser range finders, digital communication device, intelligence gathering sensor, electronically integrated apparel, night vision equipment, power tool, calculator, radio, remote controlled appliance, GPS device, handheld and portable television, car starters, flashlights, acoustic devices, portable heating device, portable vacuum cleaner or a portable medical tool.
22 . The vehicle of claim 20 , wherein the vehicle is an electric vehicle.