Battery housings for accommodating swelling of electrode assemblies
View Patent ↗Battery housings and batteries are presented for accommodating swelling of an electrode assembly. In one aspect, a battery includes an electrode assembly that includes a cathode and an anode. The battery also includes a receptacle that includes at least one feedthrough disposed through one or more sides of the receptacle. A lid is sealed to the receptacle. The receptacle, the at least one feedthrough, and the lid form a sealed volume in which the electrode assembly and an electrolyte are disposed. The lid is configured to displace from a first position to a second position in response to a swelling of the electrode assembly within the sealed volume. The receptacle is configured to strain less than the lid during the swelling of the electrode assembly. The second position of the lid may correspond to an expanded volume of the electrode assembly that is 15% greater than an initial volume.
1. A battery, comprising:
an electrode assembly comprising a cathode and an anode;
a receptacle comprising at least one feedthrough disposed through one or more sides of the receptacle; and
a lid sealed to the receptacle;
wherein the receptacle, the at least one feedthrough, and the lid form a sealed volume in which the electrode assembly and an electrolyte are disposed;
wherein the lid is configured to displace from a first position to a second position in response to a swelling of the electrode assembly within the sealed volume; and
wherein the receptacle is configured to strain less than the lid during the swelling of the electrode assembly.
2. The battery of claim 1 , wherein the second position of the lid corresponds to an expanded volume of the electrode assembly that is 15% greater than an initial volume.
3. The battery of claim 2 , wherein the electrode assembly and the lid are separated by a gap no greater than 15% of an initial thickness of the electrode assembly.
4. The battery of claim 1 , wherein the lid defines an undulating section that expands from the first position to the second position.
5. The battery of claim 1 , wherein the lid includes a flexible element to expand from the first position to the second position.
6. The battery of claim 1 further comprising a seal between the lid and the receptacle.
7. The battery of claim 1 , wherein the lid comprises a laminate comprising a metal layer and a polymer layer.
8. The battery of claim 7 , wherein the metal layer comprises aluminum and the polymer layer comprises polypropylene.
9. The battery of claim 1 , comprising a sealing compound disposed between the receptacle and the lid.
10. The battery of claim 9 wherein the sealing compound comprises a polymer.
11. The battery of claim 10 , wherein the polymer comprises polypropylene.
12. The battery of claim 1 , wherein the receptacle is configured to strain no greater than 0.1% during the swelling of the electrode assembly.
13. The battery of claim 1 , wherein the one or more sides of the receptacle each have an exterior surface and an interior surface connected by an edge.
14. The battery of claim 13 , wherein a seal is formed between the lid and the edge of at least one side.
15. The battery of claim 13 , wherein a seal is formed between the lid and the exterior surface of at least one side.
16. The battery of claim 13 , wherein a seal is formed between the lid and the interior surface of at least one side.