Systems and methods for interleaved introduction of multi-layer pouch cells

Abstract

The invention provides a system and a method for staggered introduction of multi-layer pouch cells. Methods and systems are provided for making an interleaved introduced multi-layer soft package, wherein the interleaved introduced multi-layer soft package is configured to be interleaved in formation, aging, and testing (FAamp; and during the period T), the chemicals are released into the soft-package cell battery as required. In one example, a system may include a primary pouch and one or more chemical pouches adjacent to the primary pouch. The primary pouch may include an electrode stack and include a cathode tab and an anode tab, and the chemical pouch may be configured to add a chemical to the primary pouch on demand. In some examples, the chemical pouch may include an electrolyte or other additive, which may be based on the FAamp; the T process and the chemical properties of each chemical are added to the main pouch on demand.

Description

Technical Field

[0001] This specification relates generally to methods and systems for manufacturing lithium-ion batteries, and more specifically to methods and systems for introducing one or more liquid components into pouch cells in an alternating sequence. Background Technology

[0002] During a typical manufacturing process for pouch cells, electrode sheets are stacked within the fabricated multilayer pouch. The electrode sheet stack may include cathode and anode contacts. Once the electrode sheet stack is placed within the multilayer pouch, an electrolyte solution is added. In some examples, one or more additives may be added to the multilayer pouch simultaneously with the addition of the electrolyte solution. Additives may include flame retardants, low-temperature performance enhancers, cycle life extenders, etc., depending on the requirements of the final product. These additives are added together with the electrolyte and can therefore be specifically selected for their stability during the manufacturing process, particularly during the formation, aging, and testing (FA&T) processes. Once the additives and electrolyte are added to the multilayer pouch, it can be sealed, preventing further addition of chemicals to the pouch. FA&T can begin after the multilayer pouch is sealed. During formation, a solid electrolyte layer (SEI) is formed at the interface between the anode and the electrolyte. Summary of the Invention

[0003] In one example, a configuration for an interleaved multilayer pouch cell in an energy storage device includes a main pouch cell housing an electrode stack and at least one chemical pouch cell adjacent to the main pouch cell. The at least one chemical pouch cell contains a compound, and is configured to add the compound to the main pouch cell at a controlled time. The main pouch cell and the one or more chemical pouch cells are formed from a common multilayer pouch cell material sheet. In this way, the multilayer pouch cell can be sealed during FA&T to prevent material from entering or leaving the multilayer pouch cell from the outside, but chemicals can be added to the main pouch cell on command during FA&T. As an example, the one or more chemical pouch cells include an electrolyte, one or more additives, and an electrolyte refill. Mechanisms such as fracturing seals or one or more sliding clamps can separate each chemical pouch cell from the main pouch cell. The seals can be broken or one or more sliding clamps can be moved to selectively and fluidly connect the chemical pouch cells to the main pouch cell as needed to add chemicals contained within the chemical pouch cells to the main pouch cell. The electrolyte can be added prior to the start of FA&T to facilitate the formation process. Formation may involve passing an electric current through the electrolyte, and some of the electrolyte in the main pack may be depleted. After formation, a chemical pack containing additives can be added to the main pack as needed, along with refills of the electrolyte and lithium. This allows for precise addition of chemicals to the main pack at the appropriate time based on the chemistry of each chemical and the FA&T process. Adding chemicals as needed can reduce chemical degradation during FA&T by allowing chemicals to be added after processes that may initiate or increase the rate of chemical degradation. Adding chemicals as needed also allows for replenishment of chemicals after they have been depleted during FA&T. During this process, the main pack containing the electrolyte stack can remain sealed to prevent the entry or exit of materials not included in the chemical pack. Additionally, gases generated during FA&T can be collected in the chemical pack, sealed, and removed from the main pack. Using a chemical pack adjacent to the main pack for dispensing chemicals and collecting gases allows these functions to be performed without the fabrication of additional containers, such as external chemical packs or gas removal packs.

[0004] It should be understood that the above description of the invention is provided to present a series of concepts further described in the detailed embodiments in a simplified form. This is not intended to identify key or essential features of the claimed subject matter, the scope of which is uniquely defined by the claims appended to the detailed embodiments. Furthermore, the claimed subject matter is not limited to embodiments that address any shortcomings mentioned above or in any part of this disclosure. Attached Figure Description

[0005] Figure 1 It is a method for manufacturing interleaved pouch cells.

[0006] Figure 2 This is a flowchart showing a method for manufacturing a pouch cell battery comprising one or more chemical pouches with interleaved introduction, the one or more chemical pouches containing an electrolyte and / or other additives.

[0007] Figure 3 This is an illustration of an example of a multi-layered flexible pack with chemical packaging, presented in an interlaced manner.

[0008] Figure 4 This is a diagram of the interlaced, multi-layered soft packaging assembled from the opened portion of a chemical soft package.

[0009] Figure 5 It is a diagram of a multi-layered soft pack with interlaced introduction of parts filled with chemical soft packs.

[0010] Figure 6 It is a diagram of a multi-layered flexible packaging for chemicals, with electrolytes and additives interspersed throughout.

[0011] Figure 7 It is a diagram of a multi-layered soft pack of chemicals that is compressed by rollers.

[0012] Figure 8 It is a diagram of a multi-layered soft pack constructed with one or more clamps interleaved, the clamps being configured to seal the multi-layered soft pack.

[0013] Figure 9 It is a diagram of an interleaved multi-layered soft pack, in which clamps are moved and rollers are applied to empty the contents of the chemical soft pack into the main soft pack.

[0014] Figure 10 It is a diagram of a multi-layered soft pack where the contents of a chemical soft pack are emptied into a main soft pack.

[0015] Figure 11 This is a flowchart describing a method for manufacturing a multilayer soft pack with staggered introduction of one or more self-sealing ports.

[0016] Figure 12 It is a diagram of a multi-layered soft pack with one or more self-sealing ports interleaved.

[0017] Figure 13 It is a diagram of a multi-layered soft pack with alternating layers that are sealed at the self-sealing port. Detailed Implementation

[0018] The following description relates to systems and methods that allow for the delayed and / or orderly addition of chemicals to pouch cell batteries. Pouch cell batteries can be multilayered pouches with staggered introductions, comprising a main pouch housing (e.g., containing) an electrode stack or electrode roll. This can be based on... Figure 1The method described herein is used to assemble pouch cells. In some examples, the interleaved multilayer pouch may include layers positioned above the main pouch according to... Figure 2 The method described in the document manufactures and in Figure 3 One or more chemical pouches are shown. Interleaved, multi-layered pouches can be assembled first with opened chemical pouches, as... Figure 4 As shown. Figure 6 As shown, before sealing the chemical pouch, the chemical dispenser can be used as follows: Figure 5 One or more chemicals are shown filling the chemical pouch. The chemical pouch may contain an electrolyte and / or other additive components, such as flame retardants that can be added at a time during the manufacturing process suitable for the chemical reactivity of the additives. For example, the formation step in the manufacturing process of a pouch cell battery includes passing a charge through the cell to form an SEI. Some additives are not electrochemically stable and may degrade under the conditions applied during the formation step. Therefore, it may be advantageous to add these additives after the formation step is complete. In one example, the chemical pouch may be separated from the main pouch by a rupture seal that can rupture when pressure is applied to the chemical pouch by rollers, such as... Figure 7 As shown in the example. In other examples, such as Figure 8 The example shown illustrates a clamp that separates a chemical pouch from a main pouch. As the clamp is removed from the bottom of the chemical pouch and pressure is applied to it via rollers, the contents of each chemical pouch can be added to the main pouch, as... Figure 9 As shown in the image. Once emptied, chemicals from the chemical pouch may accumulate in the main pouch, such as... Figure 10 As shown. In Figure 12 In other examples shown, one or more self-sealing ports may be integrally formed into one or more sides of the main soft package. This can be determined according to... Figure 11 The method shown herein is for manufacturing a multilayered pouch with interleaved injection ports. The injection ports may allow electrolytes and other additives to be added to the main pouch at different stages of the FA&T process, but prevent liquid from overflowing from the main pouch. Once all additives and electrolytes have been added to the main pouch, the injection ports can be sealed later under heating. The sealed injection ports can be... Figure 13 As shown in the diagram. If excess gas is generated within the main package, the location of the injection port can later be used as the location for venting the gas.

[0019] Figure 1This is a flowchart describing method 100, an example of a method for manufacturing an interleaved pouch cell battery. Method 100 can be performed by one or more manufacturing machines designed to perform one or more functions within method 100 and / or by a skilled worker capable of performing one or more of the functions within method 100. Method 100 can be performed in a controlled environment to prevent moisture and / or debris from contacting the components of the interleaved pouch cell battery. At 102, method 100 includes preparing electrode sheets. Preparing electrode sheets can begin by creating an electrode slurry, which may include a binder, active material, conductive material, and optionally a solvent. The binder or solvent combines the other components into a homogeneous paste, and in some examples may be polyvinylidene fluoride. The active material generates electrical energy during battery discharge. In one example, the active material is lithium metal oxide for the cathode and graphite for the anode. The conductive material increases the conductivity of the electrode slurry, and an example conductive material is graphite. The binder, active material, and solvent can be agitated in a vacuum to form a bubble-free homogeneous paste called a slurry. The slurry can then be added to a coater, in which it is poured onto a conductive metal foil. The coater scrapes off excess slurry from the conductive metal foil and dries the foil. Once dry, the conductive metal foil is compressed and cut to the desired size and shape using a roller press to form electrode sheets. Conductive tips remain on the electrode sheets.

[0020] At position 106, an electrode stack is formed. One electrode stack includes a separator that prevents electrical contact between the cathode and anode of the battery but allows ions to pass through. The separator is placed between one or more electrode sheets. In the electrode stack, the electrode sheets and separators are stacked vertically, and may include one or more stacks containing a separator between two electrode sheets. In other examples, a jelly roll may be used instead of an electrode stack. A jelly roll can resemble an electrode stack because the separator is placed between layers of electrode sheets. However, the separator can be rolled between two layers to form multiple layers of electrode sheets and separators in a jelly roll. Jelly rolls or electrode stacks can be used in pouch cells and can be selected based on the battery specifications. Additional figures may refer to an electrode stack; however, in other examples, an electrode stack may be replaced by a jelly roll.

[0021] At point 108, a multilayer pouch for interleaved introduction of chemicals is formed, and an electrode stack is inserted into the interleaved multilayer pouch. The method used to form the interleaved multilayer pouch can vary depending on its design. The pouch can be configured to irreversibly add additives. In this way, additives can be introduced in an interleaved manner without later removal, which could potentially contaminate the environment inside the pouch. For example, regarding… Figure 2A method for forming a multilayered soft pack with multiple fragile chemical pouches through staggered introduction is described. (About...) Figure 11 A method for forming an interleaved multilayer pouch is described, the interleaved multilayer pouch including an injection port through which additives, electrolytes, and other chemicals are introduced into the interleaved multilayer pouch. The interleaved multilayer pouch is formed from a flat sheet of material such as an aluminum laminate, wherein a first side of the sheet is configured to contact internal components of a pouch cell, and a second side of the sheet is configured to face outwards. The sheet can be folded such that the first side faces inwards and the second side faces outwards, and one or more sides of the sheet are heat-sealed to form the interleaved multilayer pouch consisting of two layers of the sheet. In other examples, two separate sheets are placed on top of each other and sealed on at least one side to form the interleaved multilayer pouch. One or more sides of the interleaved multilayer pouch are kept open to allow the addition of an electrode stack. The electrode stack is placed in the multilayer pouch through the unsealed side. Heat sealing may include applying heat to a portion of the multilayer pouch to fuse the two layers of the sheet together, thereby forming a seal in the interleaved multilayer pouch. At 110, one or more portions of the interleaved multilayer pouch are sealed to enclose the electrode stack within the main pouch of the interleaved multilayer pouch. The main pouch is the portion of the interleaved multilayer pouch that houses the electrode stack and is the pouch to which chemicals are added.

[0022] At point 112, one or more additives are optionally added to one or more chemical pouches within an interleaved, multi-layered pouch. If according to... Figure 2 The described method forms an interleaved, multi-layered pouch, which can be executed in step 112, wherein multiple fracturing pouches are formed above the main pouch. An additive is added to the chemical pouch, and then the chemical pouch is sealed, but the seal on the main pouch can be broken to fluidly connect the main pouch and the chemical pouch to release the additive into the main pouch as needed. According to... Figure 11 In the example of the method described to form the main soft package, step 112 can be skipped, and the method can proceed to step 114.

[0023] At 114, method 100 includes performing a formation, aging, and testing (FA&T) process on a pouch cell while adding one or more additives to the pouch. Formation may include passing current through the cell for the first time and forming a solid electrolyte interface (SEI) layer at the interface between the anode and electrolyte within the main pouch. Aging may include aging the manufactured cell, which may include waiting for chemical reactions occurring during manufacturing to cease. Testing may include testing the battery's power output, testing the strength of the seals included in the pouch cell, and / or various other tests. Additives may degrade during the formation phase due to the electrochemical stability of some additives. Chemicals may be introduced into the main pouch in an interleaved manner to allow the addition of chemicals at the optimal stage of FA&T based on the chemistry of each additive and the FA&T process. Interleaved chemical introduction cannot be performed with a conventional pouch cell because conventional pouches are completely sealed before FA&T begins. Chemicals cannot be introduced into a completely sealed conventional pouch without breaking the seal between the inside and outside of the conventional pouch.

[0024] The staggered introduction multilayer pouch described herein allows for the introduction of chemicals into the master pouch on demand without disrupting the seals separating the interior from the exterior of the staggered introduction multilayer pouch. This allows for FA&T to be performed in a typical manner, while also allowing for the addition of chemicals on demand during FA&T. In one example, an initial amount of electrolyte can be introduced into the master pouch before the formation process, and a refill amount of electrolyte can be introduced into the master pouch after the formation process to compensate for electrolyte loss during FA&T. Method 100 ends after 114.

[0025] Figure 2 It describes the manufacture of flexible packaging containing one or more chemicals (such as those related to...). Figure 3 A flowchart of a method 200 for constructing a pouch cell battery with an interleaved multilayer pouch (303) is described. Method 200 is performed at 108 of method 100. As described above with respect to 108, an interleaved multilayer pouch is constructed, which allows for the interleaved release of chemicals into the main pouch. After starting, method 200 proceeds to 206.

[0026] At 206, method 200 may include tightly sealing a first side and a second side of an interleaved multilayer pouch. The first and second sides may be vertical sides parallel to each other and positioned on opposite sides of the interleaved multilayer pouch. The interleaved multilayer pouch may have a first side, a second side, a third side, and a fourth side. The third and fourth sides may be horizontal sides parallel to each other and positioned on opposite sides of the interleaved multilayer pouch. The third and fourth sides may be perpendicular to the first and second sides. In some examples, the third side may be positioned below the fourth side relative to a vertical axis. The third side may be sealed during the construction of the interleaved multilayer pouch, and an electrode stack is placed within the interleaved multilayer pouch after the bottom is sealed. At the end of 206, the interleaved multilayer pouch may be a pouch sealed on the first, second, and third sides and open on the fourth side. At 206, the interleaved multilayer pouch contains an electrode stack. At 208, the method includes forming one or more chemical pouches with fracturing seals adjacent to a main pouch. The main pouch may include part of a multi-layered pouch containing an electrode stack and includes space for adding chemicals. The chemical pouches may be positioned adjacent to the main pouch and may be constructed by creating one or more tight vertical seals parallel to a first side and a second side. The tight vertical seals may extend a certain height from the fourth side toward the third side. The tight seal may be a fluid-impermeable seal, impermeable to gases and liquids, and prevents rupture under pressure applied to break the fracturing seal. The tight vertical seals prevent any chemicals added to the chemical pouches from leaking into adjacent chemical pouches. In a first example, a bottom may be added to each chemical pouch by creating a fracturing seal that separates each chemical pouch from the main pouch. A heat seal may be used at a lower thermal setting or by applying heat for a shorter duration than that used to create the fluid-impermeable seal. In a second example, a bottom may be added to each chemical pouch by applying one or more sliding clamps between the main pouch and the chemical pouches. One or more sliding clamps can be moved or removed to fluidly attach one or more chemical pouches to a main pouch. The chemical pouches can be held open at the top of each chemical pouch along a fourth side. At 210, method 200 includes filling each chemical pouch with one or more additives or electrolytes. The staggered, multi-layered pouches can be weighed during the process, and a certain mass of additive or electrolyte can be added to each chemical pouch, depending on the amount of each additive or electrolyte used in the construction of the pouch battery. In some examples, the additive can be a liquid (such as an electrolyte solution); however, solid additives are also possible.

[0027] At 212, the opening along the fourth side of each chemical pack is sealed with a fluid-impermeable seal to enclose the additive or electrolyte within each chemical pack. 212 can be an example of the additive process described at 112 of method 100. At 214, pressure is sequentially applied to one or more chemical packs to empty the contents of each chemical pack into a master pack. Rollers can apply pressure to each chemical pack, thereby creating pressure within the chemical pack that breaks the fracturing seal at the bottom of each chemical pack. In some examples, a clamp can be used to seal the bottom of the chemical pack, and the clamp can be moved to empty each chemical pack while the rollers ensure that all additive material is discharged from the chemical pack. This can occur during the FA&T described with respect to 114 of method 100. Each chemical pack can be emptied in an FA&T step specific to the chemical properties of the additive and the requirements of the FA&T process. For example, an electrochemically unstable flame retardant can be added after the formation process.

[0028] At point 216, all additives have been added to the master pouch, and FA&T has ended. The addition of chemicals and the FA&T process generate gases during the chemical reaction. The multilayer pouch can be positioned such that these gases fill the chemical pouch upon release. A tight heat seal is then formed between the master pouch and the chemical pouch, and the chemical pouch is trimmed from the master pouch. The chemical pouch and the gases therein can then be discarded, leaving the fully assembled pouch cell battery in the master pouch. After point 216, method 200 ends.

[0029] Figure 3 This is a schematic diagram of a pouch cell battery 300 assembled according to method 200. The pouch cell battery 300 can be described relative to a Cartesian coordinate system 301. The Cartesian coordinate system may include a y-axis parallel to the vertical dimensions of the components within the pouch cell battery. Top and above can refer to components in a positive y-position relative to other components, while bottom and below can refer to components in a negative y-position relative to other components. Height can be used to describe the extent of components parallel to the y-axis. The x-axis is parallel to the longitudinal direction, and width can describe the extent of components parallel to the x-axis. The z-axis can define the thickness of the components.

[0030] At 208 of method 200, an interleaved multilayer soft pack 303 is formed, the interleaved multilayer soft pack including a main soft pack 302, a first chemical soft pack 304, a second chemical soft pack 306, a third chemical soft pack 308, and a fourth chemical soft pack 310. The interleaved multilayer soft pack 303 may include at least one chemical soft pack, and in addition to Figure 3 In addition to the four soft packages shown, a number of other soft packages are also considered to be within the scope of this disclosure.

[0031] The width of the main pouch 302 along the x-axis can be equal to the combined width of the first chemical pouch 304, the second chemical pouch 306, the third chemical pouch 308, and the fourth chemical pouch 310 along the x-axis. In some examples, the first chemical pouch 304, the second chemical pouch 306, the third chemical pouch 308, the fourth chemical pouch 310, and the other chemical pouches of the pouch cell 300 can have the same width. In other examples, the first chemical pouch 304, the second chemical pouch 306, the third chemical pouch 308, the fourth chemical pouch 310, and the other chemical pouches of the pouch cell 300 can have variable widths to accommodate different additive dosages. For example, if a large amount of initial electrolyte is required, the chemical pouch containing the initial electrolyte may be wider than the chemical pouch containing a smaller amount of additives. In some examples, each chemical pouch has the same height, and the top 307 of the main pouch separates the main pouch 302 from the chemical pouches. In some examples, the top 307 of the main soft pack includes one or more smaller fracturing seals, each configured to fluidly connect the chemical soft pack to the main soft pack 302 upon rupture of the fracturing seal. The top 307 of the main soft pack may extend a width along the x-axis along the top 305 of the staggered multilayer soft pack 303. An electrode stack 312 may be placed within the main soft pack 302. In some examples, the electrode stack 312 may be a jelly roll. The electrode stack 312 may be coupled to anode tabs 314 and cathode tabs 316, respectively extending through the vertical sides of the staggered multilayer soft pack 303. The vertical sides of the staggered multilayer soft pack 303 may be sealed around the anode tabs 314 and cathode tabs 316 such that material sealed within the main soft pack 302 does not leak from the main soft pack 302 into the surrounding environment.

[0032] Figure 4This is an illustration of a fillable, staggered-introduced pouch cell 400, a stage in the manufacturing process described at 208 of method 200. In some examples, the bottom seal 424 may be a crease instead of a seal. The bottom seal 424 may be applied at 108 of method 100. A first vertical side seal 420 and a second vertical side seal 422, each sealed at 206 of method 200, may be present. The first vertical side seal 420 may seal around the anode tab 314, and the second vertical side seal 422 may tightly seal around the cathode tab 316, such that neither gas nor liquid can leave or enter the staggered-introduced multilayer pouch 303 through the first vertical side seal 420 or the second vertical side seal 422. The first vertical side seal 420 and the second vertical side seal 422 may extend the entire height along the y-axis of the staggered-introduced multilayer pouch 303. A first vertical seal 404, a second vertical seal 406, and a third vertical seal 408 may be present, extending along the y-axis to a certain height from the top 305 of the staggered multi-layered pouch 303. In some examples, each vertical seal may extend along the y-axis to the same height from the top 305 of the staggered multi-layered pouch 303. Each vertical seal may be a fluid-impermeable seal separating the chemical pouches. A rupture seal (such as a first rupture seal 412) may form part of the bottom of each chemical pouch and the top 307 of the main pouch. When force is applied to the chemical pouch, the rupture seal can be opened, which may empty the contents of the chemical pouch into the main pouch 302. The first chemical pouch 304 includes a left side formed by a first vertical side seal 420, a right side formed by a first vertical seal 404, and a bottom formed by a first rupture seal 412. The second chemical soft pack 306 includes a left side formed by a first vertical seal 404, a right side formed by a second vertical seal 406, and a bottom formed by a second fracturing seal 414. The third chemical soft pack 308 includes a left side formed by a second vertical seal 406, a right side formed by a third vertical seal 408, and a bottom formed by a third fracturing seal 416. The fourth chemical soft pack 310 includes a left side formed by a third vertical seal 408, a right side formed by a second vertical side seal 422, and a bottom formed by a fourth fracturing seal 418. During this stage of manufacturing, each chemical soft pack may have an open top.

[0033] Figure 5 This is a schematic diagram depicting a fillable interleaved pouch cell battery 400, wherein the fillable interleaved pouch cell battery 400 is located at 210 of method 200, wherein the chemical pouch of the fillable interleaved pouch cell battery 400 is filled. (The last part, "via...", appears to be incomplete and unrelated to the preceding text. It has been left as is.) Figure 5 In the manufacturing stage shown, the pouch cell is positioned below the filling machine 502.

[0034] The filling machine 502 may include a first dispenser 504, a second dispenser 506, a third dispenser 508, and a fourth dispenser 510. The filling machine 502 may be configured to store individual chemicals and dispense them into each of the dispensers. In some examples, multiple filling machines may perform the function of the filling machine 502. The first dispenser 504 may be configured to dispense a first chemical 512 into a first chemical pouch 304, the second dispenser 506 may be configured to dispense a second chemical 514 into a second chemical pouch 306, the third dispenser 508 may be configured to dispense a third chemical 516 into a third chemical pouch 308, and the fourth dispenser 510 may be configured to dispense a fourth chemical 518 into a fourth chemical pouch 310.

[0035] Chemicals can be added to chemical pouches one at a time via a dispenser. In one example, a first chemical 512 can be dispensed first, followed by a second chemical 514, a third chemical 516, and a fourth chemical 518. In some examples, the first chemical 512 is an electrolyte. In some examples, the fillable, interleaved pouch cell 400 is positioned on a scale, allowing for accurate determination of the mass of each chemical added to each chemical pouch. In some examples, the dispenser associated with the pouch stops dispensing chemicals once the measured mass of chemicals has been added to the pouch. For example, the first dispenser 504 can be turned off if the scale has measured that the target mass of the first chemical 512 has been added to the first chemical pouch 304. Once the predetermined mass of each additive or electrolyte has been added to each chemical pouch, the top of each chemical pouch can be sealed. In some examples, each chemical pouch can be sealed once the appropriate amount of chemicals has been added before filling another chemical pouch. For example, the first chemical pouch 304 can be filled and sealed before the second chemical pouch 306 is filled and sealed. In other examples, all chemical pouches can be filled, and then all chemical pouches can be sealed.

[0036] Figure 6This is a diagram of a sealed, interleaved pouch cell battery 600. The sealed, interleaved pouch cell battery 600 can be formed at 212 of method 200, wherein chemical pouches that can be filled with the interleaved pouch cell battery 400 are sealed. A first chemical pouch 304 can be sealed by a top seal 602, a second chemical pouch 306 can be sealed by a second top seal 604, a third chemical pouch 308 can be sealed by a third top seal 606, and a fourth chemical pouch can be sealed by a fourth top seal 608. As described above, the first top seals can be applied in any order; in some examples, the top seals can be applied individually, and in some examples, they can form a single, continuous top seal applied simultaneously to all chemical pouches.

[0037] Figure 7 This is a diagram of a staggered, sealed pouch cell 600 at 214 of method 200, where rollers are applied to one or more chemical pouches to empty the contents of the chemical pouches into a master pouch 302. In this example, roller 702 is applied to a first chemical pouch 304. In some examples, the roller may be configured to have the same width along the x-axis as the first chemical pouch 304. In some examples, the roller may apply pressure to the first chemical pouch 304. When sufficient pressure is applied to the first pouch, a first fracturing seal 412 may rupture, releasing a first chemical 512 into the master pouch 302. Roller 702 may be operated in such a way that the chemical within the chemical pouch is applied to each chemical pouch during a desired time period for release into the master pouch during FA&T. For example, the first chemical 512 may be an electrolyte released just before formation begins. After formation occurs, roller 702 can be applied to the second chemical pack 306 to release the second chemical 514 into the main pack 302. The second chemical 514 can be an electrolyte refill to replenish the electrolyte consumed during formation. In some examples, rollers can be applied to the first chemical pack 304, followed by the second chemical pack 306, the third chemical pack 308, and the fourth chemical pack 310; however, other sequences are also possible.

[0038] Figure 8 Depicting according to Figure 2Method 200 is an alternative arrangement for assembling the pouch cell battery 800. As a supplement to or alternative to one or more seals (such as bottom seal 424, first fracturing seal 412, second fracturing seal 414, third fracturing seal 416, and fourth fracturing seal 418), the pouch cell battery 800 can be assembled using one or more jigs. The pouch cell battery 800 may include a jig device 810 comprising a sliding jig 802, a bottom jig 804, a first crossbar 806, and a second crossbar 808. In one example, the jig device 810 may be coupled to the multilayer pouch at 108 during the manufacture of the staggered multilayer pouch and after the electrode stack has been inserted into the main pouch 302. The jig device 810 may be secured to the exterior of the pouch cell battery 800. The first crossbar 806 and the second crossbar 808 may be vertically positioned across the electrode stack 312. In some examples, the first crossbar 806 and the second crossbar 808 can connect the bottom clamp 804 to the sliding clamp 802. The bottom clamp 804 can be secured above the bottom of the staggered multi-layer pouch 303 and its width along the x-axis is slightly greater than the width of the staggered multi-layer pouch 303. The bottom clamp 804 can include a first clamping member on the front side 812 of the pouch cell 800 and a second clamping member on the back side of the pouch cell 800. The back side of the pouch cell 800 can be a view of the pouch cell 800 seen from the -z direction (e.g., the negative z direction), while conversely, the front side 812 is a view of the pouch cell 800 seen from the +z direction (e.g., the positive z direction). A portion of the main pouch 302 can be between the first clamping member and the second clamping member, and the first clamping member and the second clamping member can be securely coupled to create a clamping seal. The sliding clamp 802 can be similar to the bottom clamp 804 because it includes a first clamping member on the front side 812 of the staggered multi-layered pouch 303 and a second clamping member on the back side of the staggered multi-layered pouch 303. The sliding clamp 802 can create a clamping seal across the top of the main pouch 302. The sliding clamp 802 can have the same width along the x-axis as the bottom clamp 804.

[0039] A sliding clamp 802 can replace the first fracturing seal 412, the second fracturing seal 414, the third fracturing seal 416, and the fourth fracturing seal 418 of the fillable interleaved pouch cell 400. The sliding clamp 802 can be configured to translate longitudinally along the x-axis to open the bottom of each chemical pouch and selectively fluidly connect each chemical pouch to the main pouch one at a time, as... Figure 9As shown in the diagram. In some examples, the sliding clamp 802 may be replaced by one or more clamps, each clamp replacing a single fracturing seal. In some examples, the clamps may be released to selectively and fluidly attach the corresponding chemical pouch to the main pouch. Alternatively or additionally, one or more clamps may be sliding clamps. For example, a first sliding clamp 814 may replace a first fracturing seal 412, a second sliding clamp 816 may replace a second fracturing seal 414, a third sliding clamp 818 may replace a third fracturing seal 416, and a fourth sliding clamp 820 may replace a fourth fracturing seal 418. Each sliding clamp may be removed to empty the contents of the corresponding chemical pouch into the main pouch 302. For example, a third sliding clamp 818 may be removed to empty the contents of a third chemical pouch 308 into the main pouch 302.

[0040] exist Figure 9 In China, it has already been based on Figure 2 Method 200 fills each chemical pouch, and it is time to add the first chemical 512 to the master pouch. To introduce the first chemical 512 into the master pouch 302, the sliding clamp 802 has been translated in the +x direction (e.g., the positive x direction) to remove the seal on the bottom of the first chemical pouch 304. The roller 702 applies pressure to the first chemical pouch 304 to ensure that all of the first chemical 512 is discharged from the first chemical pouch 304 into the master pouch 302. During the FA&T process, each chemical can be added to the master pouch at different times, and the sliding clamp 802 can be translated in the +x direction to open the bottom of each chemical pouch to add the chemical to the master pouch. In another example, the first sliding clamp 814 has been removed from the first chemical pouch 304 to introduce the first chemical 512 into the master pouch 302. The roller 702 is still applied to the first chemical pouch to discharge all of the first chemical 512 from the first chemical pouch 304.

[0041] Whether via, Figures 4 to 7 The fragile seal shown is still via Figures 8 to 9 The sliding clamp 802 shown adds chemicals to the main soft package 302. First chemical 512, second chemical 514, third chemical 516, and fourth chemical 518 are all added to the main soft package 302. Figure 10 As shown in the image.

[0042] exist Figure 10In this process, a chemical mixture 1000, consisting of a first chemical 512, a second chemical 514, a third chemical 516, and a fourth chemical 518, is collected within a main soft pack 302. Reactions between the chemicals and the FA&T process may produce gases as byproducts. The staggered, multi-layered soft packs 303 can be positioned such that gases are collected in a first chemical soft pack 304, a second chemical soft pack 306, a third chemical soft pack 308, and a fourth chemical soft pack 310. Once the gases are collected in the chemical soft packs, a gas seal 1002 can be applied to separate the main soft pack 302 from the chemical soft packs. The gas seal 1002 can be a gas-tight seal created by heat sealing. In this way, some of the gases generated during FA&T are sealed within the chemical soft packs. The chemical soft packs can then be trimmed along the gas seal 1002 to separate them from the main soft pack 302. Chemical pouches such as the first chemical pouch 304, the second chemical pouch 306, the third chemical pouch 308, and the fourth chemical pouch 310 can then be discarded, and the main pouch 302 forms a fully assembled pouch cell battery.

[0043] about Figure 11 Alternative methods for assembling pouch cells are described. Figure 11 This is a flowchart depicting method 1100 for manufacturing a pouch cell including one or more injection ports, through which chemicals may be added during FA&T. In some examples, one injection port is added to the pouch cell; however, other examples may include two injection ports. Method 1100 may be performed at 108 of method 100, wherein an interleaved multilayer pouch is formed and an electrode stack is added to the interleaved multilayer pouch. At 1106, method 1100 includes placing the injection ports on each vertical side of the interleaved multilayer pouch. Method 1100 may describe a method of adding two injection ports to a pouch cell, but in some examples, method 1100 may be tailored to one injection port or other number of injection ports to be added to the pouch cell. The injection port may be placed between two layers of the sheet constituting the interleaved multilayer pouch and may be positioned slightly above the cathode and anode of the pouch cell relative to the y-axis. The injection port may be self-sealing and heat-resistant.

[0044] At 1108, the vertical side of the interleaved multilayer package is sealed at the main package sealing temperature. During the sealing process, the injection port can be held in place. In some examples, the outer surface of the port (e.g., the surface coplanarly in contact with the main package) can be coated with an adhesive configured to form a fluid-impermeable seal with the main package. The injection port can be heat-resistant at the main package sealing temperature, such that the heat-sealing process of sealing the vertical side does not affect the injection port, but allows the vertical side to seal tightly around the injection port and around the cathode and anode. The fluid-impermeable seal prevents gas and liquid from entering or leaving the interleaved multilayer package. In some examples, a plastic can be applied to the outer layer of the port to create a sealing bond with the package, which further seals the interface between the port and the package. The interleaved multilayer package can have a bottom, a top, and two vertical sides. The bottom can be sealed during the formation of the interleaved multilayer package, and an electrode stack can be placed within the interleaved multilayer package. At the end of step 1108, the staggered multilayer pouch can be a pouch sealed on three sides and open at the top. An electrode stack can be inserted through the open top, and a heat seal can be applied to the top, allowing chemicals to enter or exit the pouch through an injection port. In some examples, the injection port may be the only orifice for allowing material to enter or exit the staggered multilayer pouch.

[0045] At 1110, one or more additives or electrolytes are sequentially injected into the staggered multilayer pouch through the injection ports. Additives and electrolytes can be injected during FA&T, and the timing of injection for each chemical can depend on the nature of the chemical. The staggered multilayer pouch can be moved to an electrolyte filling station, where electrolytes are added to the staggered multilayer pouch through one or more of the injection ports. The electrolyte filling station is similar to filling machine 502 in that it includes one or more dispensers, each configured to dispense one or more chemicals. In embodiments where the electrolyte filling station is used to dispense chemicals through the injection ports, each dispenser may include a nozzle configured to be coupled to the injection port. The nozzle may be configured to deliver chemicals through the injection port without spilling. In some examples, each dispenser may include two nozzles, a first nozzle configured to be coupled to a first injection port and a second nozzle configured to be coupled to a second injection port. Dispensing chemicals through two injection ports at a time allows chemicals to be delivered to the staggered multilayer pouch at a faster rate compared to dispensing chemicals through a single injection port. FA&T can be performed after adding electrolytes and chemicals (such as flame retardants and additives), and refilled electrolytes can be added to the soft pack.

[0046] At 1112, method 1100 includes allowing gas to escape through a port. During FA&T, gas may be generated as a byproduct of various chemical reactions involved in FA&T. To prevent expansion, this gas can be removed from the pouch cell before the manufacturing process is complete. Instead of trapping the gas in the pouch, sealing, and removing it, the gas can escape through the injection port. In some examples, one or more steps of FA&T can be performed in a vacuum. In some examples, gas leaving the pouch through the injection port can be captured and disposed of.

[0047] At 1114, method 1100 includes a thermally shut-off injection port. The injection port can be configured to seal under conditions of an applied inlet duct sealing temperature. The port sealing temperature can be higher than the main pouch sealing temperature of the impermeable seal used to form the main pouch. Once the injection port is sealed, material exiting or entering the pouch is prevented. Excess material can be trimmed from the injection port before or after sealing. Once sealed, the injection port can be used as a predetermined rupture point. If the pouch cell requires servicing or has reached the end of its lifespan, the sealed injection port can be opened as an initial point for destructive entry into the pouch cell. In other examples, if a threshold pressure inside the main pouch is exceeded, the sealed port can be opened to vent gases generated during normal use of the pouch cell battery, or to inject an inhibitor into the pouch cell before it is opened.

[0048] Figure 12 This is an example of a pouch cell battery 1200 assembled according to method 1100. The pouch cell battery 1200 may include interleaved multilayer pouches 1201. The interleaved multilayer pouches 1201 may be rectangular in shape and may include two layers of material sealed together at one or more sides of the interleaved multilayer pouches 1201. The interleaved multilayer pouches 1201 may include a main pouch 1204, and in some examples may optionally include an upper pouch 1202. The upper pouch 1202 may be adjacent to the main pouch 1204 and may be configured to trap gases generated during FA&T. In alternative examples, the interleaved multilayer pouches 1201 may not include an upper pouch 1202, and gases generated during FA&T may be discharged through ports (e.g., a first port 1214 and / or a second port 1216).

[0049] The main pouch 1204 may be rectangular in shape and includes a bottom seal 1224, a top seal 1226, a first vertical side seal 1220, and a second vertical side seal 1222. The bottom seal 1224 may be parallel to the top seal 1226 and may have the same length as the top seal 1226. The first vertical side seal 1220 may be parallel to the second vertical side seal 1222 and may have the same height as the first vertical side seal 1220. The first vertical side seal 1220 may be perpendicular to the bottom seal 1224. The first vertical side seal 1220, the second vertical side seal 1222, and the top seal 1226 may be formed by heat sealing, the heat sealing fusing together to form two layers of material in the interleaved multilayer pouch 1201. The bottom seal 1224 may be formed by heat sealing, or it may be a crease in the material sheet constituting the interleaved multilayer pouch 1201.

[0050] In some examples, the upper soft pack may include a top seal 1226 shared with the main soft pack 1204, and may share a first vertical side 1220 and a second vertical side 1222 with the main soft pack 1204. The main soft pack may also include a gas seal 1228 parallel to the top seal 1226. The gas seal 1228 may be positioned below the top seal 1226 relative to the y-axis and may extend between the first vertical side 1220 and the second vertical side 1222. The gas seal 1228 may separate the main soft pack 1204 from the upper soft pack 1202. In examples where the staggered multilayer soft pack 1201 does not include the upper soft pack 1202, the gas seal 1228 may be the top seal of the main soft pack 1204.

[0051] A bottom seal 1224 can be created first, and an electrode stack 1206 can be inserted into the main pouch 1204. The electrode stack 1206 can be coupled to an anode tab 1208 and a cathode tab 1210. The anode tab 1208 and cathode tab 1210 can be metallic and can serve as contacts for external electronics to connect to the pouch cell 1200. A first port 1214 can be positioned above the anode tab 1208, and a second port 1216 can be positioned above the cathode tab 1210. The first port 1214 and the second port 1216 can be conical and made of plastic or another material. The ports can be configured to allow the injection of chemicals from the outside of the staggered multilayer pouch 1201 into the interior of the main pouch 1204. When the first vertical side seal 1220 and the second vertical side seal 1222 are applied, the first port 1214 and the second port 1216 can be held in place by one or more clamps. As described in 1108 of method 1100, the injection port can be heat-sealed in place within the vertical seal without melting. Once the vertical side seal is formed, the top seal 1226 can be formed via heat sealing. In this way, the main package 1204 is sealed, and material can enter or exit the main package 1204 through the first port 1214 and the second port 1216. In some examples, the injection port may be the only orifice through which material can enter or exit the main package 1204. Chemicals added to the main package 1204 through the port can be collected in a chemical mixture 1212 within the main package 1204. Chemicals can be added through the port at any time during FA&T.

[0052] During FA&T, gases may be generated, which may collect in the upper portion of the main pouch 1204. In an example where the staggered multilayer pouch 1201 includes an upper pouch 1202, a gas seal 1228 can be formed after FA&T to separate the upper pouch 1202 from the main pouch 1204. The upper pouch may contain a portion of the gases generated during FA&T, which can reduce the amount of gas within the main pouch 1204. The upper pouch 1202 can be separated from the main pouch 1204 by a cut along the gas seal 1228. After separation, the upper pouch 1202 can be disposed of, and the main pouch 1204 can be used to form a pouch cell battery.

[0053] Alternatively or concurrently, the gas generated within the main package 1204 during FA&T can be removed from the main package 1204 via one or more injection ports, such as first port 1214 and second port 1216. In some examples, the staggered multilayer package 1201 may not include the upper package 1202, and gas can be removed only via one or more injection ports. In some examples, FA&T can be performed in a vacuum to facilitate gas removal from the main package 1204 via first port 1214 and second port 1216.

[0054] Figure 13 The pouch cell 1200 is shown after the first port 1214 and the second port 1216 have been heat-sealed and excess material (such as, optionally, the upper pouch 1202) has been trimmed from them. The first port 1214 can be redirected to a first predetermined rupture point 1302, and the second port 1216 can be redirected to a second predetermined rupture point 1304. The predetermined rupture points can serve as points for entering the main pouch 1204 for gas removal, for destructively entering the pouch cell 1200, or for injecting inhibitors before opening the pouch cell 1200. In other examples, the predetermined rupture points can be used to release gas from the pouch cell 1200 if excessive gas generation occurs.

[0055] The technical effect of methods 100, 200, and 1100 is to produce interleaved multilayer pouch cells configured to allow the addition of one or more electrolytes or additives to the pouch cell as needed before, during, and after FA&T. Adding chemicals as needed during FA&T allows for the addition of chemicals as soon as they are used in the FA&T process and / or during FA&T phases that contribute to the chemical properties of the chemicals, which can reduce chemical degradation. For example, adding an electrolyte to the pouch cell immediately before formation can reduce electrolyte degradation. In another example, adding electrochemically unstable chemicals to the pouch cell after formation can limit the degradation of these additives. Additionally, the interleaved multilayer pouch cells manufactured according to methods 100, 200, and 1100 may include mechanisms for removing gases generated during FA&T from the pouch cell, which can improve the pouch cell lifespan.

[0056] This disclosure provides support for a configuration of interleaved multilayer pouch cells for energy storage devices, the configuration comprising: a main pouch containing an electrode stack; and at least one chemical pouch adjacent to the main pouch, wherein the at least one chemical pouch contains a compound, and the main pouch and the at least one chemical pouch are formed from a common multilayer pouch material sheet, and the at least one chemical pouch is configured to add the compound to the main pouch at a controlled time. In a first example of the system, the chemical pouch is fluid-sealed to the main pouch by a seal. In a second example of the system optionally including the first example, the seal is fracturing to fluidly couple the chemical pouch to the main pouch. In a third example of the system optionally including one or both of the first and second examples, the chemical pouch is fluid-sealed to the main pouch by a sliding clamp. In a fourth example of the system optionally including one or more of the first to third examples, the sliding clamp is configured to translate to selectively fluidly couple the chemical pouch to the main pouch. In a fifth example, which optionally includes one or more of the first to fourth examples, the chemical pouch is fluid-sealed to the main pouch by a clamp. In a sixth example, which optionally includes one or more of the first to fifth examples, the clamp is configured to fluidly engage the chemical pouch to the main pouch when released.

[0057] This disclosure also provides support for a configuration of interleaved multilayer pouch cells for energy storage devices, the configuration including: a main pouch housing an electrode stack; and a port positioned within a seal of the main pouch, wherein the port is configured to remain open at a main pouch sealing temperature and to be sealed at a port sealing temperature to form a sealed port, wherein the port sealing temperature is higher than the main pouch sealing temperature. In a first example of the system, the port is configured to allow the introduction of chemicals into the main pouch. In a second example of the system optionally including the first example, the sealed port is configured to rupture at a pressure higher than a threshold pressure within the main pouch. In a third example of the system optionally including one or both of the first and second examples, the outer surface of the port is coated with an adhesive configured to form a fluid-impermeable seal with the main pouch. In a fourth example of the system optionally including one or more of the first to third examples, the port is a self-sealing port.

[0058] This disclosure also provides support for a method for interleaved multilayer pouch cell, the method comprising: sealing an electrode stack within a multilayer pouch cell to form the interleaved multilayer pouch cell, wherein the interleaved multilayer pouch cell is configured for irreversible addition of additives; adding one or more additives to the interleaved multilayer pouch cell; and performing formation, aging, and testing of the electrode stack while adding the one or more additives to the interleaved multilayer pouch cell. In a first example of the method, sealing the electrode stack within the multilayer pouch cell includes placing a self-sealing port on the side of the multilayer pouch cell. In a second example of the method, optionally including the first example, adding the one or more additives to the interleaved multilayer pouch cell includes injecting the additives through the self-sealing port. In a third example of the method, optionally including one or both of the first and second examples, the method further comprises: heat-sealing the self-sealing port after performing formation, aging, and testing, and adding the one or more additives. In a fourth example, which optionally includes one or more of the first to third examples, sealing the electrode stack within the multilayer pouch cell comprises: forming a main pouch housing the electrode stack and a chemical pouch housing the one or more additives via heat sealing and / or clamping. In a fifth example, which optionally includes one or more of the first to fourth examples, sealing the electrode stack within the multilayer pouch cell further comprises: adding one of the one or more additives to the chemical pouch before sealing to form an interleaved multilayer pouch cell. In a sixth example, which optionally includes one or more of the first to fifth examples, adding the one or more additives comprises adding them from the chemical pouch to the main pouch by breaking a fracturing seal or removing a clamp. In a seventh example, which optionally includes one or more of the first to sixth examples, adding the one or more additives comprises: applying pressure to the chemical pouch using a roller to move the one or more additives from the chemical pouch to the main pouch.

[0059] Figures 3 to 10 and Figures 12 to 13Example configurations with the relative positioning of various components are shown. Unless otherwise stated, in at least one example, if such components are shown to be in direct contact or directly connected, they may be referred to as being in direct contact or directly connected, respectively. Similarly, in at least one example, components shown to be adjacent to or next to each other may be referred to as being adjacent to or next to each other, respectively. As an example, components that are in coplanar contact with each other may be referred to as being in coplanar contact. As another example, in at least one example, components positioned apart from each other with only space between them and no other components may be referred to as being so. As yet another example, components shown to be above / below each other, on opposite sides of each other, or to the left / right of each other may be referred to as being so relative to each other. Furthermore, as shown in the figures, in at least one example, the topmost component or the apex of a component may be referred to as the “top” of the component, and the bottommost component or the lowest point of a component may be referred to as the “bottom” of the component. As used herein, top / bottom, upper / lower, above / below may be relative to the vertical axis of the figures and are used to describe the positioning of the components of the figures relative to each other. Thus, in one example, an component shown above other components is located directly above the other components. As another example, the shapes of the elements depicted in the figures may be described as having those shapes (e.g., such as circular, straight, planar, curved, rounded, chamfered, angled, etc.). Furthermore, in at least one example, elements shown as intersecting each other may be described as intersecting elements or intersecting one another. Further still, in one example, an element shown as being inside another element or outside another element may be described as such.

[0060] According to the present invention, a configuration for an interleaved multilayer pouch cell for an energy storage device is provided, comprising: a main pouch containing an electrode stack; and at least one chemical pouch adjacent to the main pouch, wherein the at least one chemical pouch contains a compound, and the main pouch and the at least one chemical pouch are formed from a common multilayer pouch material sheet, and the at least one chemical pouch is configured to add the compound to the main pouch at a controlled time.

[0061] According to an embodiment, the chemical soft package is fluidly sealed to the main soft package by a seal.

[0062] According to an embodiment, the seal is fracture-resistant to fluidly connect the chemical pouch to the main pouch.

[0063] According to an embodiment, the chemical soft package is fluid-sealed to the main soft package by a sliding clamp.

[0064] According to an embodiment, the sliding clamp is configured to translate to selectively and fluidly attach the chemical pouch to the main pouch.

[0065] According to an embodiment, the chemical soft package is fluid-sealed to the main soft package by a clamp.

[0066] According to an embodiment, the clamp is configured to fluidly connect the chemical pouch to the main pouch when released.

[0067] According to the present invention, a configuration of an interleaved multilayer pouch cell for an energy storage device is provided, comprising: a main pouch containing an electrode stack; and a port located within a seal of the main pouch, wherein the port is configured to remain open at a main pouch sealing temperature and be sealed at a port sealing temperature higher than the main pouch sealing temperature.

[0068] According to an embodiment, the port is configured to allow the introduction of chemicals into the main soft package.

[0069] According to an embodiment, the sealed port is configured to rupture when the pressure exceeds a threshold within the main soft package.

[0070] According to an embodiment, the outer surface of the port is coated with an adhesive, which is configured to form a fluid-impermeable seal with the main soft package.

[0071] According to an embodiment, the port is a self-sealing port.

[0072] According to the present invention, a method for interleaved multilayer pouch cell includes: sealing an electrode stack within a multilayer pouch cell to form the interleaved multilayer pouch cell, wherein the interleaved multilayer pouch cell is configured for irreversible addition of additives; adding one or more additives to the interleaved multilayer pouch cell; and performing formation, aging, and testing of the electrode stack while adding the one or more additives to the interleaved multilayer pouch cell.

[0073] In one aspect of the invention, sealing the electrode stack within the multilayer pouch cell includes placing a self-sealing port on the side of the multilayer pouch cell.

[0074] In one aspect of the invention, adding the one or more additives to the interleaved multilayer pouch cell includes injecting the additives through the self-sealing port.

[0075] In one aspect of the invention, the method includes heat-sealing the self-sealing port after performing formation, aging and testing, and adding the one or more additives.

[0076] In one aspect of the invention, sealing the electrode stack within the multilayer pouch cell comprises: forming a main pouch containing the electrode stack and a chemical pouch containing one or more additives via heat sealing and / or clamping.

[0077] In one aspect of the invention, sealing the electrode stack within the multilayer pouch cell further includes adding one of one or more additives to the chemical pouch before sealing to form an interleaved multilayer pouch cell.

[0078] In one aspect of the invention, adding the one or more additives includes adding them from the chemical pouch to the master pouch by breaking a fracturing seal or removing a clamp.

[0079] In one aspect of the invention, adding the one or more additives comprises: applying pressure to the chemical pouch using a roller to move the one or more additives from the chemical pouch to the main pouch.

Claims

1. A configuration of interleaved multilayer pouch cells for an energy storage device, comprising: The main soft package contains the electrode stack; as well as At least one chemical soft pack, adjacent to the main soft pack, wherein the at least one chemical soft pack contains a compound, and the main soft pack and the at least one chemical soft pack are formed from a common multilayer soft pack material sheet, and the at least one chemical soft pack is configured to add the compound to the main soft pack at a controlled time.

2. The interleaved multilayer pouch cell as claimed in claim 1, wherein the chemical pouch is fluidly sealed to the main pouch by a sealant.

3. The interleaved multilayer pouch cell as claimed in claim 2, wherein the seal is fracture-resistant to fluidly connect the chemical pouch to the main pouch.

4. The interleaved multilayer pouch cell as described in claim 1, wherein the chemical pouch is fluid-sealed to the main pouch by a sliding clamp.

5. The interleaved multilayer pouch cell of claim 4, wherein the sliding clamp is configured to translate to selectively and fluidly connect the chemical pouch to the main pouch.

6. The interleaved multilayer pouch cell as claimed in claim 1, wherein the chemical pouch is fluid-sealed to the main pouch by a clamp.

7. The interleaved multilayer pouch cell of claim 6, wherein the clamp is configured to fluidly connect the chemical pouch to the main pouch when released.

8. A method for interleaved introduction of multilayer pouch cells, comprising: The electrode stack is sealed within a multilayer pouch cell to form the interleaved multilayer pouch cell, wherein the interleaved multilayer pouch cell is configured for the irreversible addition of additives. One or more additives are added to the interleaved multilayer pouch cell; as well as The electrode stack is formed, aged, and tested while one or more of the additives are added to the interleaved multilayer pouch cell.

9. The method of claim 8, wherein sealing the electrode stack within the multilayer pouch cell comprises placing a self-sealing port on the side of the multilayer pouch cell.

10. The method of claim 9, wherein adding the one or more additives to the interleaved multilayer pouch cell comprises injecting the additives through the self-sealing port.

11. The method of claim 9, further comprising heat-sealing the self-sealing port after performing formation, aging and testing, and adding the one or more additives.

12. The method of claim 8, wherein sealing the electrode stack within the multilayer pouch cell comprises: A main soft package for housing the electrode stack and a chemical soft package for housing one or more additives are formed by heat sealing and / or clamping.

13. The method of claim 12, wherein sealing the electrode stack within the multilayer pouch cell further comprises: Before sealing to form the interleaved multilayer pouch cell, one of the one or more additives is added to the chemical pouch.

14. The method of claim 12, wherein adding the one or more additives comprises adding them from the chemical pouch to the master pouch by breaking a fracturing seal or removing a clamp.

15. The method of claim 12, wherein adding the one or more additives comprises: Pressure is applied to the chemical pouch using rollers to move the one or more additives from the chemical pouch to the main pouch.

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