Battery sealing

Abstract

Battery sealing is disclosed. Several battery systems include multiple layers of one or more of a polymer, a metal, and a fiber.

Description

Technical Field

[0001]

[0013] Embodiments described herein generally relate to sealing of batteries. Background Art

[0002] The seal area of ​​a battery cell is the most important area for battery safety and integrity for controlling moisture and air ingress. Specifically, defects in the seal area may expose the internal components of the battery. However, simply increasing the seal application time, pressure, and temperature does not solve the seal area problem.

[0003] A typical pouch sealing wall for sealing a battery includes a first layer of a first polymer such as nylon, a second layer of aluminum or other metal, and a third layer of a second polymer such as polypropylene. In a typical structure, there are two pouch walls, and the second polymer layers face each other and are sealed on the edges. With current sealing arrangements and processes, air and moisture may penetrate the battery cell, the moisture reacts with the battery material, gas is generated, and battery swelling occurs. Summary of the invention

[0004] One aspect of the present disclosure relates to a bladder wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; a third layer comprising a second polymer; and a fourth layer comprising a high temperature fiber.

[0005] Another aspect of the present disclosure relates to a bladder wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; a third layer comprising a high temperature fiber; and a fourth layer comprising a second polymer.

[0006] Yet another aspect of the present disclosure relates to a capsule wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; and a third layer comprising a second polymer; wherein the first layer, the second layer, and the third layer include edges; wherein the edges include a first fold of approximately 180 degrees; and wherein the edges include a second fold of approximately 90 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In the accompanying drawings, which are not necessarily drawn to scale, similar reference numerals may describe similar components in different views. Similar reference numerals with different letter suffixes may represent different instances of similar components. Some embodiments are shown by way of example and not limitation in the figures of the accompanying drawings.

[0008] Figure 1A and Figure 1B is a diagram of an embodiment of a battery sealing system.

[0009] Figure 2 is a diagram of another embodiment of a battery sealing system.

[0010] Figure 3A , Figure 3B and Figure 3C is a diagram of another embodiment of a battery sealing system.

[0011] Figure 4 is a diagram of another embodiment of a battery sealing system.

[0012] Figure 5 is a diagram of another embodiment of a battery sealing system. DETAILED DESCRIPTION

[0013] Figure 1A and Figure 1B is a diagram of an embodiment of a battery sealing system. Figure 1A Shown are bladder walls 100 and 110 which, when implemented, surround and enclose a battery 120 . Figure 1A Also shown are a first layer 102, a second layer 104, a third layer 106, and a fourth layer 108. The first layer 102 includes a first polymer. The second layer 104 includes a metal. The third layer 106 includes a second polymer. The fourth layer 108 includes a high temperature fiber. Figure 1A It can be seen that the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer. As with other embodiments disclosed herein, Figure 1A and Figure 1B The multiple layers of embodiments and the materials of these multiple layers increase the mechanical strength of the bladder, which can withstand external damage caused by screws or other sharp objects.

[0014] In one embodiment, the first polymer is a first thermoplastic polymer resin, and the second polymer is a second thermoplastic polymer resin. The first thermoplastic polymer resin and the second thermoplastic polymer resin have different melting points. The first thermoplastic polymer resin can be terephthalate, and the second thermoplastic polymer resin can be polypropylene. The metal layer can be aluminum, copper or stainless steel. The high temperature fiber can be a polyester fiber.

[0015] like Figure 1A As shown, the first layer 102 is an outer layer of the bladder wall. The fourth layer 108 is an inner layer of the bladder wall, i.e., it is immediately adjacent to the battery 120. The fourth layer 108 is configured for positioning adjacent to the battery cell and for sealing to the second bladder using the fourth layer. However, in another embodiment, the second bladder wall may not have the fourth layer 108. In one embodiment, the fourth layer 108 is an integral layer of the bladder wall. In another embodiment, the fourth layer comprises a non-integral layer of the bladder wall, i.e., it is added to the existing bladder wall; it is not included in the initial formation of the bladder wall.

[0016] like Figure 1AAs shown, the fourth layer 108 is on the capsule wall 100, but not on the capsule wall 110. Figure 1A When the two capsule walls are sealed together, the fourth layer 108 is adhered to the third layer 106 of the capsule wall 110. In another embodiment, as Figure 1B As shown, both bladder walls 100 and 110 include a fourth layer 108 which are then sealed to one another.

[0017] Figure 2 is a diagram of another embodiment of a battery sealing system 200. Figure 2 In the embodiment, the capsule wall for sealing the battery includes a first layer 202, a second layer 204, a third layer 206 and a fourth layer 208. The first layer 202 is a first polymer. The second layer 204 is a metal. The third layer 206 is a high temperature fiber. The fourth layer 208 is a second polymer. Figure 2 As shown, the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

[0018] The first polymer is a first thermoplastic polymer resin, and the second polymer is a second thermoplastic polymer resin. The first thermoplastic polymer resin and the second thermoplastic polymer resin have different melting points. In one embodiment, the first thermoplastic polymer resin is polyethylene terephthalate, and the second thermoplastic polymer resin is polypropylene. The metal layer can be aluminum, copper or stainless steel. The high temperature fiber can be a polyester fiber, such as mylar. The high temperature fiber can have a melting point greater than 100 degrees Celsius, is an electrical insulator, is chemically stable to organic solvents, has a thickness of less than 15 microns, is flexible, includes no more than two layers, and has an open grid structure. In addition, in one embodiment, the first layer is about 10 microns thick, the second layer is about 30 microns thick, the third layer is about 5 microns thick, and the fourth layer is about 20 microns thick.

[0019] The first layer is an outer layer of the pouch. The fourth layer is an inner layer of the pouch, ie, the fourth layer is located adjacent to the battery cell.

[0020] When the capsule wall is used to seal the battery, the second capsule wall having the second polymer layer is placed adjacent to the second polymer layer of the first capsule wall, so that the second polymer layer of each capsule wall forms a seal. The second capsule wall is similar to the first capsule wall, including a high temperature fiber layer, a metal layer and a first polymer layer. On the second capsule wall, the high temperature fiber layer is adjacent to the metal layer, and the metal layer is adjacent to the first polymer layer.

[0021] Figure 3A , Figure 3B and Figure 3C is a diagram of another embodiment of a battery sealing system. Figure 3A , the battery sealing system includes a first layer 302, a second layer 304 and a third layer 306. Figure 3AAs further shown in FIG. 1 , the second layer 304 is adjacent to the first layer 302, and the third layer 306 is adjacent to the second layer 304. In one embodiment, as Figure 3C As shown, the third layer 306 extends beyond the first layer 302. The first layer is a first polymer and the third layer is a second polymer. The first polymer can be a first thermoplastic polymer resin, such as polyethylene terephthalate, and the second polymer can be a second thermoplastic polymer resin, such as polypropylene. The first thermoplastic polymer resin and the second thermoplastic polymer resin can have different melting points. The second layer is a metal. The metal can be aluminum, copper, or stainless steel. Figure 3B and Figure 3C As shown, the first layer, the second layer and the third layer are first folded at an angle of about 180 degrees, and then the first layer, the second layer and the third layer are folded at an angle of about 90 degrees. In one embodiment, the adhesive is placed adjacent to the 90 degree fold.

[0022] Figure 4 is a diagram of another embodiment of a battery sealing system 400 . Figure 4 A battery sealing system 400 is shown including a first layer 402, a second layer 404, a third layer 406, and a fourth layer 408. The first layer may be a high temperature fiber, the second layer is a metal, the third layer is another layer of the high temperature fiber, and the fourth layer is a polymer. Figure 4 As shown, the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer. The polymer can be a thermoplastic polymer resin, such as polyethylene terephthalate or polypropylene. The metal can be aluminum, copper or stainless steel. The high temperature fiber can be a polyester fiber. The first layer is the outer layer of the capsule wall, and the fourth layer is the inner layer of the capsule wall. The fourth layer is configured to be positioned adjacent to the battery cell and to be sealed to the second capsule wall using the fourth layer. In one embodiment, the first layer is about 10 microns thick, the second layer is about 20 microns thick, the third layer is about 10 microns thick, and the fourth layer is about 10 microns thick.

[0023] Figure 5 5 is a diagram of another embodiment of a battery sealing system 500. The battery sealing system 500 includes a first layer 502, a second layer 504, a third layer 506, and a fourth layer 508. The first layer is a high temperature fiber, such as a polyester fiber. The second layer is a first polymer. The third layer is another layer of the high temperature fiber. The fourth layer is a second polymer. The second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer. The first layer includes an outer layer of the bladder wall, and the fourth layer includes an inner layer of the bladder wall, and the fourth layer is configured to be positioned adjacent to the battery cell and to be sealed to the second bladder using the fourth layer. In one embodiment, the first layer is about 10 microns thick, the second layer is about 20 microns thick, the third layer is about 10 microns thick, and the fourth layer is about 10 microns thick.

[0024] Example

[0025] The first example is a bag wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; a third layer comprising a second polymer; and a fourth layer comprising a high temperature fiber.

[0026] The second example includes all of the features of the first example, and optionally includes a capsule wall, wherein the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

[0027] Example 3 includes all the features of Examples 1 to 2, and optionally includes a capsule wall, wherein the first polymer includes a first thermoplastic polymer resin, and the second polymer includes a second thermoplastic polymer resin, the first thermoplastic polymer resin and the second thermoplastic polymer resin have different melting points; and wherein the metal includes aluminum, copper or stainless steel.

[0028] The fourth example includes all features of the first to third examples and optionally includes a bladder wall, wherein the first layer comprises an outer layer of the bladder wall and the fourth layer comprises an inner layer of the bladder wall, the fourth layer being configured for positioning adjacent to a battery cell.

[0029] The fifth example includes all of the features of the first to fourth examples, and optionally includes a capsule wall, wherein the fourth layer includes an integral layer of the capsule wall.

[0030] The sixth example includes all of the features of the first to fifth examples, and optionally includes a capsule wall, wherein the fourth layer includes a non-integral layer of the capsule wall.

[0031] The seventh example includes all of the features of the first to sixth examples, and optionally includes a bladder wall, wherein the high temperature fiber includes polyester fiber.

[0032] The eighth example is a bag wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; a third layer comprising a high temperature fiber; and a fourth layer comprising a second polymer.

[0033] A ninth example includes all of the features of the eighth example, and optionally includes a capsule wall, wherein the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

[0034] The tenth example includes all of the features of the eighth to ninth examples and optionally includes a bladder wall wherein the high temperature fiber includes polyester fiber.

[0035] The 11th example includes all the features of the 8th to 10th examples, and optionally includes a bladder wall, wherein the first polymer includes a first thermoplastic polymer resin, and the second polymer includes a second thermoplastic polymer resin, the first thermoplastic polymer resin and the second thermoplastic polymer resin having different melting points; wherein the metal includes aluminum, copper or stainless steel; and wherein the high temperature fiber includes polyester fiber.

[0036] The twelfth example includes all of the features of the eighth to eleventh examples and optionally includes a bladder wall, wherein the first layer comprises an outer layer of the bladder and the fourth layer comprises an inner layer of the bladder, the fourth layer being configured for positioning adjacent to the battery cell.

[0037] The 13th example includes all of the features of the 8th to 12th examples, and optionally includes a bladder wall including a fifth layer including high temperature fibers; a sixth layer including metal; and a seventh layer including a first polymer.

[0038] The 14th example includes all of the features of the 8th to 13th examples, and optionally includes a capsule wall, wherein the fifth layer is adjacent to the fourth layer, the sixth layer is adjacent to the fifth layer, and the seventh layer is adjacent to the sixth layer.

[0039] Example 15 is a capsule wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising a metal; and a third layer comprising a second polymer; wherein the first layer, the second layer, and the third layer include edges; wherein the edges include a first fold of approximately 180 degrees; and wherein the edges include a second fold of approximately 90 degrees.

[0040] A sixteenth example includes all of the features of the fifteenth example, and optionally includes a capsule wall, wherein the second layer is adjacent to the first layer, and the third layer is adjacent to the second layer.

[0041] The seventeenth example includes all of the features of the fifteenth to sixteenth examples, and optionally includes a capsule wall including an adhesive positioned adjacent to the second fold.

[0042] The 18th example includes all of the features of the 15th to 17th examples, and optionally includes a capsule wall wherein the third layer is longer than the first layer.

[0043] The 19th example includes all the features of the 15th to 18th examples, and optionally includes a capsule wall, wherein the first polymer includes a first thermoplastic polymer resin, and the second polymer includes a second thermoplastic polymer resin, the first thermoplastic polymer resin and the second thermoplastic polymer resin have different melting points; and wherein the metal includes aluminum, copper or stainless steel.

[0044] The 20th example is a bag wall for sealing a battery, comprising: a first layer comprising high temperature fibers; a second layer comprising metal; a third layer comprising high temperature fibers; and a fourth layer comprising a polymer.

[0045] The 21st example includes all of the features of the 20th example, and optionally includes a capsule wall, wherein the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

[0046] The 22nd example includes all of the features of the 20th to 21st examples, and optionally includes a bladder wall, wherein the polymer includes a first thermoplastic polymer resin; wherein the metal includes aluminum, copper, or stainless steel; and wherein the high temperature fiber includes polyester fiber.

[0047] The 23rd example includes all of the features of the 20th to 22nd examples, and optionally includes a bladder wall, wherein the first layer comprises an outer layer of the bladder wall, and the fourth layer comprises an inner layer of the bladder wall, and the fourth layer is configured to be positioned adjacent to the battery cell.

[0048] The 24th example is a bag wall for sealing a battery, comprising: a first layer comprising polyester fiber; a second layer comprising a first polymer; a third layer comprising polyester fiber; and a fourth layer comprising a second polymer.

[0049] The 25th example includes all of the features of the 24th example, and optionally includes a capsule wall, wherein the second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

[0050] The 26th example includes all of the features of the 24th to 25th examples, and optionally includes a bladder wall, wherein the first layer comprises an outer layer of the bladder wall, and the fourth layer comprises an inner layer of the bladder wall, and the fourth layer is configured to be positioned adjacent to the battery cell.

[0051] The above detailed description includes reference to the accompanying drawings, which form a part of the detailed description. The accompanying drawings show specific embodiments that can be put into practice by way of illustration. These embodiments are also referred to as "examples" in this article. Such examples may include elements other than the elements shown or described. However, examples including the elements shown or described are also contemplated. In addition, examples (or one or more aspects of the examples) using any combination or arrangement of those elements shown or described are also contemplated with respect to a specific example (or one or more aspects of a specific example) or with respect to other examples (or one or more aspects of other examples) shown or described herein.

[0052] Publications, patents, and patent documents cited in this document are incorporated herein by reference in their entirety, as if individually incorporated by reference. In the event of an inconsistency between the usages of this document and those so incorporated by reference, the usage in the incorporated reference(s) supplements that of this document; for conflicting inconsistencies, the usage in this document controls.

[0053] In this document, as is common in patent literature, the terms "a" or "an" are used to include one or more than one, regardless of any other examples or uses of "at least one" or "one or more". In this document, unless otherwise indicated, the term "or" is used to refer to a non-exclusive or, such that "A or B" includes "A but not B", "B but not A", and "A and B". In the claims, the terms "including" and "in which" are used as the plain English equivalents of the corresponding terms "comprising" and "wherein". In addition, in the claims, the terms "including" and "comprising" are open-ended, that is, systems, devices, articles, or processes that include elements other than those listed after such terms in the claims are still considered to fall within the scope of the claim. In addition, in the claims, the terms "first", "second", and "third", etc. are used only as labels and are not intended to imply a numerical order of their objects.

[0054] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more aspects thereof) may be used in combination with other examples. For example, a person of ordinary skill in the art may use other embodiments after reading the above description. The abstract enables the reader to quickly determine the nature of the technical disclosure. The abstract is submitted, but it should be understood that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the above specific embodiments, various features may be grouped together to streamline the present disclosure. However, the claims may not set forth each feature disclosed herein, because the embodiments may be characterized by a subset of the features. In addition, the embodiments may include fewer features than those disclosed in a particular example. Therefore, the claims are incorporated into the specific embodiments herein, wherein the claims themselves exist as separate embodiments. The scope of the embodiments disclosed herein is to be determined with reference to the claims and the full scope of equivalents given by these claims.

Claims

1. A capsule wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising metal; a third layer comprising a second polymer; as well as The fourth layer contains high temperature fibers.

2. The capsule wall according to claim 1, wherein: The second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

3. The capsule wall according to claim 1, wherein: The first polymer includes a first thermoplastic polymer resin, and the second polymer includes a second thermoplastic polymer resin, the first thermoplastic polymer resin and the second thermoplastic polymer resin having different melting points; and wherein the metal includes aluminum, copper, or stainless steel.

4. The capsule wall according to claim 1, wherein: The first layer comprises an outer layer of the bladder wall and the fourth layer comprises an inner layer of the bladder wall, the fourth layer being configured for positioning adjacent to a battery cell.

5. The capsule wall according to claim 1, wherein: The fourth layer comprises an integral layer of the capsule wall.

6. The capsule wall according to claim 1, wherein: The fourth layer comprises a non-integral layer of the capsule wall.

7. The capsule wall according to claim 1, wherein: The high temperature fiber includes polyester fiber.

8. A capsule wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising metal; a third layer comprising high temperature fibers; as well as A fourth layer comprises a second polymer.

9. The capsule wall according to claim 8, wherein: The second layer is adjacent to the first layer, the third layer is adjacent to the second layer, and the fourth layer is adjacent to the third layer.

10. The capsule wall according to claim 8, wherein: The high temperature fiber includes polyester fiber.

11. The capsule wall according to claim 8, wherein: The first polymer includes a first thermoplastic polymer resin and the second polymer includes a second thermoplastic polymer resin, the first thermoplastic polymer resin and the second thermoplastic polymer resin having different melting points; wherein the metal includes aluminum, copper or stainless steel; and wherein the high temperature fiber includes polyester fiber.

12. The capsule wall according to claim 8, wherein: The first layer comprises an outer layer of the bladder and the fourth layer comprises an inner layer of the bladder, the fourth layer being configured for positioning adjacent to a battery cell.

13. The capsule wall according to claim 8, comprising: a fifth layer comprising said high temperature fiber; a sixth layer comprising the metal; as well as A seventh layer comprises the first polymer.

14. The capsule wall according to claim 13, wherein: The fifth layer is adjacent to the fourth layer, the sixth layer is adjacent to the fifth layer, and the seventh layer is adjacent to the sixth layer.

15. A capsule wall for sealing a battery, comprising: a first layer comprising a first polymer; a second layer comprising metal; and a third layer comprising a second polymer; wherein the first layer, the second layer, and the third layer include edges; wherein the edge comprises a first fold of approximately 180 degrees; and Wherein, the edge includes a second fold of approximately 90 degrees.

16. The capsule wall according to claim 15, wherein: The second layer is adjacent to the first layer, and the third layer is adjacent to the second layer.

17. The capsule wall of claim 15 including an adhesive positioned adjacent the second fold.

18. The capsule wall according to claim 15, wherein: The third layer is longer than the first layer.

19. The capsule wall according to claim 15, wherein: The first polymer comprises a first thermoplastic polymer resin, and the second polymer comprises a second thermoplastic polymer resin, The first thermoplastic polymer resin and the second thermoplastic polymer resin have different melting points; And wherein the metal includes aluminum, copper or stainless steel.

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