Electrode assembly and its battery device

Abstract

This invention provides an electrode assembly and its battery device, which utilizes a first strip current collector layer and a second strip current collector layer to sandwich multiple electrochemical systems, and is completely enclosed by a frame, so that the electrochemical systems are independent of each other, with only charge transfer and no electrochemical reaction. The frame located between two adjacent electrochemical systems, as well as the first and second strip current collector layers adhered to the frame, can be bent together to form a bending section, so that the electrochemical systems can be folded and stacked to adjacent electrochemical systems, completing vertical stacking along the Z-axis. This not only facilitates mass production, but also reduces the number of series or parallel electrode tabs, thereby reducing the energy density loss due to space configuration.

Description

Technical Field

[0001] The present invention provides an electrode assembly, particularly an electrode assembly and battery device thereof that is bent and stacked in the Z-axis direction. Background Technology

[0002] In recent years, with the rapid development of various portable electronic products, electric vehicles, and energy storage power stations, there has been a growing demand for energy storage devices with high energy density and environmental protection capabilities. Lithium-ion batteries have become the preferred choice, leading to the development of various secondary batteries such as lithium-ion, magnesium-ion, and sodium-ion batteries. Therefore, maximizing energy density within a limited space has always been a key focus for the entire related industry.

[0003] For example, in the case of Chinese Patent CN103959540 (see Figure 1A), a negative electrode 12 and a positive electrode 13 are formed by coating both sides of a single current collector 11. The current collector 11 is then bent, and a separator 14 is placed at the interface between the two adjacent electrodes to form a Z-shaped cell fold. In another case by the same applicant, such as Chinese Patent CN110521045, a Z-shaped cell fold involves forming multiple negative electrode patterns with predetermined spacing on a current collector and multiple positive electrode patterns with predetermined spacing on another current collector. The spacing pattern area is an area without electrode material coating, and a separator is used to separate the positive and negative electrode patterns; however, it still falls under the category of electrode material stacking. Furthermore, as shown in Figure 1B, in the case of Taiwan Patent TW94104832, a flexible separator 15 is used for bending. The negative electrode 16 and positive electrode 17 are simply attached to both sides of the separator 15, and vertical stacking is achieved using the separator 15 for insulation. However, all of the above technologies involve directly stacking positive and negative electrode layer materials through a separator. Without a buffer component, the bending stress can easily cause the positive and negative electrode layer materials to break. Furthermore, due to the shared electrolyte, problems such as voltage limitation or uneven electric field distribution may arise.

[0004] In view of this, the present invention addresses the above-mentioned deficiencies by proposing a novel electrode assembly and its battery device. Summary of the Invention

[0005] The main objective of this invention is to provide an electrode assembly and its battery device, wherein the electrode assembly is in a Z-shaped folded stacked state, and the bending position only has a strip current collector layer and a plastic frame, so as not to cause the electrode layer to break.

[0006] Another objective of this invention is to provide an electrode assembly and its battery device, wherein the electrode assembly is stacked and electrically connected after being folded in a Z-shape, reducing the number of series or parallel tabs, improving production efficiency and flexibility in power demand matching, reducing production difficulty, and reducing energy density loss in space configuration.

[0007] Another objective of this invention is to provide an electrode assembly and its battery device, wherein the electrode assembly is formed by directly sandwiching an electrochemical system and a frame between two strip current collector layers, thus enabling mass production and facilitating mass production and commercialization.

[0008] This invention proposes an electrode assembly, which mainly includes a first strip-shaped current collector layer, a second strip-shaped current collector layer, an adhesive frame, multiple electrochemical systems, and multiple bends. The first and second strip-shaped current collector layers sandwich multiple electrochemical systems, which are completely enclosed by the adhesive frame, ensuring that each electrochemical system is independent and only involves charge transfer without electrochemical reaction. The adhesive frame between two adjacent electrochemical systems, as well as the first and second strip-shaped current collector layers adhered to the frame, can be bent together to form the bend, allowing the electrochemical systems to be stacked vertically along the same axis. Therefore, the completely enclosed electrochemical systems are independent and only involve charge transfer without electrochemical reaction, eliminating the defects caused by electrolyte sharing. Furthermore, the bend is only the adhesive frame and the adhered strip-shaped current collector layers, thus avoiding the problem of electrode layer breakage due to bending.

[0009] On the other hand, the battery device provided by the present invention can be constructed by housing the electrode assembly, and the space between the electrode assembly and the housing can be filled with a heat dissipation agent or a flame retardant to improve heat dissipation efficiency to maintain battery performance and improve the safety of the battery device. Attached Figure Description

[0010] Figures 1A and 1B are schematic diagrams of Z-shaped cell folding in the prior art.

[0011] Figure 2A This is a three-dimensional schematic diagram of the electrode assembly of the present invention.

[0012] Figure 2B This is a side view of the electrode assembly of the present invention.

[0013] Figure 2C This is an exploded view of the electrode assembly of the present invention before bending.

[0014] Figure 2D This is a schematic diagram of the electrode assembly of the present invention before bending.

[0015] Figure 2E This is a schematic diagram showing the addition of stress-reinforcing material to the electrode assembly of the present invention.

[0016] Figure 3 This is a schematic diagram of another embodiment of the electrode assembly of the present invention.

[0017] Figure 4 This is a schematic diagram of another embodiment of the adhesive frame of the electrode assembly of the present invention.

[0018] Figures 5A-5E This is a schematic diagram of the bending and stacking operation of the electrode assembly of the present invention.

[0019] Figure 5F This is a schematic diagram showing the addition of a heat dissipation and current collector to the electrode assembly of the present invention.

[0020] Figures 6A-6H This is a schematic diagram of the electrode assembly of the present invention applied to a battery device with an aluminum-clad casing.

[0021] Figures 7A-7H This is a schematic diagram of another embodiment of the electrode assembly of the present invention applied to a battery device with an aluminum cladding casing.

[0022] Figure 8A This is a schematic diagram of the electrode assembly of the present invention applied to a battery device with a button-like battery casing.

[0023] Figure 8B This is a schematic diagram of the electrode assembly of the present invention applied to a battery device with an insulating coating on a button-like battery casing.

[0024] Figure 8C This is another schematic diagram of the electrode assembly of the present invention applied to a battery device with an insulating coating on a button-like battery casing.

[0025] Figure Labels

[0026] 11 Current collectors

[0027] 12 Negative electrode

[0028] 13 Positive electrode

[0029] 14. Diaphragm

[0030] 15 Isolation Layers

[0031] 16 Negative electrode

[0032] 17 Positive electrode

[0033] 30 Electrode Assembly

[0034] 301 Electrochemical System

[0035] 31. Diaphragm

[0036] 32 First strip current collector layer

[0037] 321 Stress-Reinforced Material

[0038] 33 Second strip current collector layer

[0039] 331 Stress-Reinforced Material

[0040] 34 First active material layer

[0041] 35 Second active material layer

[0042] 36 Frame

[0043] 361 Opening groove

[0044] 362 Modified Silicone Layer

[0045] 363 Modified Silicone Layer

[0046] 364 silicone layer

[0047] 38. Bend

[0048] 41 Heat dissipation current collector

[0049] 411 Ontology

[0050] 412 Extension

[0051] 42 Heat dissipation current collector

[0052] 421 Ontology

[0053] 422 Extension

[0054] 51 Aluminum Clad

[0055] 52 Conductive handle

[0056] 53 Conductive handle

[0057] 61. Outer shell

[0058] 611 Top Case

[0059] 612 Lower Shell

[0060] 613 Insulation materials

[0061] 614 Insulating Coating

[0062] 615 Conductive Bus

[0063] 616 Insulator Detailed Implementation

[0064] To make the advantages, spirit, and features of the present invention more readily apparent, detailed descriptions and discussions will follow with reference to the embodiments and accompanying drawings. It should be noted that these embodiments are merely representative examples of the present invention and are not intended to limit the scope of the invention. The purpose of providing these embodiments is solely to make the disclosure of the present invention more thorough and easily understood.

[0065] The terminology used in the various embodiments disclosed in this invention is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments disclosed in this invention. Unless explicitly indicated otherwise, the singular forms used also include the plural forms. Unless otherwise specified, all terms used in this specification (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed in this invention pertain. The foregoing terms (such as those defined in general-purpose dictionaries) are to be interpreted as having the same meaning as in the context of the same technical field and are not to be interpreted as having an idealized or overly formal meaning unless explicitly defined in the various embodiments disclosed in this invention.

[0066] In the description of this specification, references to terms such as "an embodiment," "a specific embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0067] In the description of this invention, unless otherwise specified or limited, it should be noted that the terms "coupled", "connected", and "set up" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be directly connected or connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0068] Please also refer to Figures 2A to 2D The figures show a perspective view, a side view, an exploded view of the electrode assembly before bending, and a view before bending, respectively, of the electrode assembly disclosed in this invention. The electrode assembly 30 of this invention mainly includes a first strip-shaped current collector layer 32 and a second strip-shaped current collector layer 33, multiple electrochemical systems 301, a frame 36, and a bending portion 38. The first strip-shaped current collector layer 32 and the second strip-shaped current collector layer 33 sandwich multiple electrochemical systems 301 and the frame 36. The frame 36 completely encloses the sides of any electrochemical system 301, with the first strip-shaped current collector layer 32 adhered to its top and the second strip-shaped current collector layer 33 adhered to its bottom. After being enclosed by the frame 36, the multiple electrochemical systems 301 are independent of each other, that is, these multiple electrochemical systems 301 only transfer charge through the current collector layers 32 and 33 and do not undergo electrochemical reactions with each other. The adhesive frame 36 located between two adjacent electrochemical systems 301, as well as the first strip current collector layer 32 and the second strip current collector layer 33 adhered to the adhesive frame 36, can be bent together to form a bent portion 38.

[0069] Looking only at the component breakdown diagram (see) Figure 2C The frame 36 has multiple openings 361 connecting its upper and lower surfaces. Each opening 361 is the location for an electrochemical system 301, and the two ends of the electrochemical system 301 are in contact with the first strip current collector layer 32 and the second strip current collector layer 33, respectively. Each electrochemical system 301 is completely enclosed by the frame 36, so that each electrochemical system 301 is independent of each other, with only charge transfer and no electrochemical reaction. Of course, the frame can also be in a non-single component state as needed, for example, multiple independent frames, such as... Figure 3 As shown.

[0070] The materials commonly used for the first strip current collector layer 32 and the second strip current collector layer 33 are copper and aluminum, but they can also be other metals or metal alloys such as nickel, tin, silver, and gold, or conductive polymer materials, for example, formed by mixing conductive materials into a polymer substrate. Because they are in strip form, they can be manufactured in large batches using patterned coating methods, which facilitates mass production.

[0071] Each electrochemical system 301 includes a first active material layer 34 and a second active material layer 35, and a separator 31 sandwiched between the first active material layer 34 and the second active material layer 35. In the manufacturing process, the first active material layer 34 is patterned and coated on the first strip current collector layer 32 at a predetermined interval, and the second active material layer 35 is patterned and coated on the second strip current collector layer 33 at the same predetermined interval, such that each second active material layer 35 corresponds to one first active material layer 34, and each separator 31 is sandwiched between a first active material layer 34 and its corresponding second active material layer 35, and stacked to form an electrochemical system 301. The membrane 31 can be made of polymer materials, ceramic materials, or glass fiber materials, and has micropores that allow ions to pass through. These micropores can be through-holes or ant holes (non-linear, interconnected structures), or even directly achieved using porous materials. When the ceramic material is selected from insulating materials, it can be micron- and nano-sized titanium dioxide (TiO2), aluminum trioxide (Al2O3), silicon dioxide (SiO2), or alkylated ceramic particles. The ceramic material can also be selected from oxide solid electrolytes, such as lithium lanthanum zirconium oxide (Li7La3Zr2O). 12Lithium aluminum titanium phosphate (LATP) or lithium titanium aluminum phosphate (LLZO) are used as the ceramic material. Alternatively, the ceramic material can be a mixture of the aforementioned insulating ceramic material and an oxide solid electrolyte. When the separator 31 contains a ceramic material, it may also contain a polymeric adhesive, such as polyvinylidene fluoride (PVDF), polyvinylidene fluoride-co-trichloroethylene (PVDF-HFP), polytetrafluoroethylene (PTFE), acrylic acid glue, epoxy resin, polyethylene oxide (PEO), polyacrylonitrile (PAN), or polyimide (PI).

[0072] In this regard, the predetermined spacing between the first active material layer 34 and the second active material layer 35 during coating can be adjusted as needed, and the size and predetermined spacing between each first active material layer 34 are not necessarily required to be consistent. Similarly, the corresponding second active material layers 35 are shown in the figure mainly as having the same size and equal spacing, but this is only for illustration and is not particularly limited.

[0073] A frame 36 is disposed around the electrochemical system 301, with its top end adhered to the first strip current collector layer 32 and its bottom end adhered to the second strip current collector layer 33. The frame 36 completely encloses each electrochemical system 301. The electrolyte system is impregnated / mixed in the first active material layer 34 and the second active material layer 35, and can be a liquid, colloidal, solid electrolyte, or a mixture of any combination thereof. The electrochemical system 301 can convert chemical energy into electrical energy for use (power supply) or convert electrical energy into chemical energy for storage in the system (charging) through its active material components, thereby simultaneously achieving ion conduction and migration. The generated electrons can be directly led outward from the first strip current collector layer 32 and the second strip current collector layer 33. Therefore, through the complete enclosure of the frame 36, each electrochemical system 301 is independent of each other, with only charge transfer and no electrochemical reaction. For example, the adhesive frame 36 can be applied to the first strip current collector layer 32 and the second strip current collector layer 33 respectively, and then the first strip current collector layer 32 and the second strip current collector layer 33 are heated and pressurized to join the adhesive frames on both sides, or it can be applied to a single current collector layer (the first strip current collector layer 32 or the second strip current collector layer 33) and then bonded, etc.

[0074] The frame 36 can be made of epoxy resin, polyethylene, polypropylene, polyurethane, thermoplastic polyimide, silicone resin, acrylic resin, silicone, or UV-curable adhesive. To improve the encapsulation effect of the frame 36, when silicone is used, it can be designed with a three-layer structure. Please refer to [link to relevant documentation]. Figure 4The upper and lower layers are modified silicone layers 362 and 363, respectively, while the middle layer is a silicone layer 364 used to bond the upper and lower modified silicone layers 362 and 363. This allows the modified silicone layer 362 to adhere to the first strip current collector layer 32, the modified silicone layer 363 to adhere to the second strip current collector layer 33, and the silicone layer 364 to be sandwiched between them. The modified silicone layers 362 and 363 on both sides are made by adjusting the composition ratio of addition-type silicone and condensation-type silicone, or by adding additives, to modify the silicone, making it suitable for bonding heterogeneous materials (i.e., the first strip current collector layer 32 and the second strip current collector layer 33). This design improves the adhesion between the interfaces, resulting in a higher overall appearance integrity and improved production yield.

[0075] For the formed electrode assembly, please refer to Figure 2D The adhesive frame 36 between two adjacent electrochemical systems 301, as well as the first strip current collector layer 32 and the second strip current collector layer 33 adhered to the adhesive frame 36, can be bent together to form a bend 38, so that the electrochemical systems 301 are stacked perpendicularly to each other along the same axis (details to follow), forming a shape as shown below. Figure 2A-2B The Z-shaped configuration; on the other hand, to further ensure the integrity of the first strip current collector layer 32 and the second strip current collector layer 33 after bending, stress reinforcements 321 and 331 may be included on at least a portion of the outer surface of one of the first strip current collector layer 32 and the second strip current collector layer 33. Please refer to Figure 2E The first strip current collector layer 32 and the second strip current collector layer 33, which serve as external electrical connections (e.g., as conductive shanks as described later), do not have stress reinforcement materials 321 and 331. Stress reinforcement materials 321 and 331 are used to increase the structural stress of the first strip current collector layer 32 and the second strip current collector layer 33. The stress reinforcement materials 321 and 331 are selected from polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PC), polystyrene (PS), polyimide, nylon, polyethylene terephthalate, polyurethane, acrylic, epoxy resin, silicone, and combinations thereof.

[0076] For instructions on bending, please refer to [link / reference]. Figure 5A The outermost electrochemical system 301 is bent to the adjacent electrochemical system 301 via its frame 36 and the bend 38 formed by the first strip current collector layer 32 and the second strip current collector layer 33 at this location (see Figure 5BThen, the previously stacked electrochemical system 301 is used for reverse folding. Similarly, the bent part is located on its frame 36 along with the first strip current collector layer 32 and the second strip current collector layer 33 at that position. Therefore, with the buffer of the frame, the electrode layer (i.e., the active material layer) will not be affected during the bending process. Then, the electrode assembly is stacked in sequence in both forward and reverse directions, and in the same direction vertically, until the entire electrode assembly is stacked (please refer to the following steps). Figure 5C-5E The electrode assembly 30 is formed in a Z-shaped vertical stack. After stacking, since the first strip current collector layer 32 and the second strip current collector layer 33 are shared, they can form a configuration in which multiple electrochemical systems 301 (battery cells) are connected in parallel.

[0077] Meanwhile, in addition to the fact that the bending point does not involve the electrode layer, thus avoiding the electrode layer from breaking; because the first strip current collector layer 32 and the second strip current collector layer 33 are mostly made of metal materials, which have a certain degree of ductility, the frame 36 can be made of a more flexible material (such as silicone), which can help the bending and stacking process to proceed smoothly.

[0078] On the other hand, to enhance its heat dissipation effect, please refer to Figure 5F It can be further provided with heat dissipation current collectors 41 and 42, which have a body 411 and 421 and multiple extensions 412 and 422 extending from the body 411 and 421. The extensions 412 and 422 are disposed between the stacked electrochemical systems 301 and are in contact with the first strip current collector layer 32 and the second strip current collector layer 33. Because it is a large-area contact method, combined with the selection of its material, the heat dissipation area can be increased, and the heat generated by the electrochemical system 301 can be dissipated smoothly. At the same time, it can also serve as an additional electrical contact.

[0079] In practical applications, the aforementioned electrode assembly 30 can be housed and encapsulated in a casing to form a battery device. For a most common example, please refer to [link to relevant documentation]. Figure 6A 6B, the outer casing can be an aluminum-clad 51 made of an aluminum-plastic film, with conductive handles 52 and 53 to conduct electricity outwards. In the embodiment shown in this figure, the electrode assembly 30 is composed of an odd number of electrochemical systems, and the conductive handles 52 and 53 extend outwards from the side of the electrode assembly. Specifically, this side refers to the side extending along the long axis of the electrode assembly 30, or the side perpendicular to the bending and stacking direction of the electrode assembly 30, and the conductive handles 52 and 53 are located on the same side. On the other hand, the electrode assembly 30 can also be composed of an even number of electrochemical systems. Please refer to [reference needed]. Figure 6C , 6D The conductive handles 52 and 53 are also located on the same side. Please also refer to... Figure 6E , 6FIn the case of an electrode assembly 30 consisting of an odd number of electrochemical systems, the conductive handles 52 and 53 can also be positioned on opposite sides of the electrochemical system 301 and extend outwards; or as... Figure 6G , 6H In the case of an electrode assembly 30 consisting of an even number of electrochemical systems, the conductive handles 52 and 53 can also be positioned on opposite sides of the electrochemical system 301 and extend outwards.

[0080] Furthermore, in addition to the aforementioned conductive handles 52 and 53 extending outwards perpendicular to the bending direction of the electrode assembly 30, the conductive handles 52 and 53 can also be designed to extend from the end face of the electrode assembly 30, that is, parallel to the bending direction of the electrode assembly 30. Please refer to [link to relevant documentation]. Figure 7A , 7B In a configuration where electrode assembly 30 is formed by an odd number of electrochemical systems, conductive handles 52 and 53 can extend from their ends to opposite sides (outer sides) of the two phases, or to the same side (see...). Figure 7C , 7D For an example of an electrode assembly 30 formed by an even number of electrochemical systems, please refer to [link / reference needed]. Figure 7E , 7F The conductive handles 52 and 53 can be extended by pulling out from two different ends of the electrode assembly 30 or from two identical end segments (see...). Figure 7G , 7H As can be seen from the above-described embodiments, the electrode assembly 30 implemented in the Z-shaped parallel stack of the present invention can have an odd number or an even number of electrochemical systems 30, thus improving the production efficiency of the electrode assembly 30, increasing the flexibility in power demand configuration, and reducing the difficulty of production.

[0081] On the other hand, such as Figure 7A As shown, the casing also adopts a button cell-like casing 61 form. The first strip current collector layer 32 and the second strip current collector layer 33 of the electrode assembly 30 can directly contact the upper and lower output electrodes of the button cell-like casing 61 to form an electrical connection. It should be noted that, as shown in the figure, the electrode assembly 30 is designed as an electrochemical system of unequal length to maximize its capacity density in conjunction with the button cell-like casing 61 form. However, this is not a limitation to using only this unequal length design. If mass production consistency is considered, other designs can also be adopted. Figure 5EThe battery can be of equal length or any other shape. A heat-dissipating agent or flame retardant is filled between the casing (including the aforementioned aluminum-clad 51 type, the button-cell battery casing 61 type, or any other shape) and the electrode assembly 30 to improve heat dissipation efficiency, maintain battery performance, and enhance the safety of the battery device. The button-cell battery casing 61 has a metal upper casing 611 and a metal lower casing 612, which are electrically insulated from each other by an insulating material 613. Furthermore, please refer to... Figure 8B If the outer surfaces of the first strip current collector layer 32 and the second strip current collector layer 33 are not provided with stress reinforcement or other insulating structures, an insulating coating 614 may be formed on a portion of the inner surface of the upper shell 611 or the lower shell 612 (which is not the default electrical connection position) to avoid improper electrical transfer between the inner surface of the upper shell 611 or the lower shell 612 and the first strip current collector layer 32 or the second strip current collector layer 33.

[0082] The foregoing Figure 8B In this context, electrode assembly 30 represents a state consisting of an odd number of electrochemical systems. For a state where electrode assembly 30 represents an even number of electrochemical systems, please refer to [link to relevant documentation]. Figure 8C Since the upper and lower sides of the electrode assembly 30 have the same polarity, it is necessary to conduct the power of the other polarity to the lower housing 612 through the conductive bus 615. At the same time, in order to prevent the conductive bus 615 from short-circuiting, an insulator 616 can be provided at an appropriate position to block it. The conductive bus 615 can also be designed as the aforementioned heat dissipation collector. The other identical parts will not be described in detail.

[0083] In summary, this invention proposes an electrode assembly and its battery device. Multiple electrochemical systems are sandwiched between a first strip-shaped current collector layer and a second strip-shaped current collector layer, and completely enclosed by a frame. This allows the electrochemical systems to operate independently, with only charge transfer and no electrochemical reaction. The frame between two adjacent electrochemical systems, along with the first and second strip-shaped current collector layers adhered to it, can be bent to form a bend, enabling the electrochemical systems to be stacked onto adjacent systems, achieving vertical stacking along the Z-axis. This not only facilitates mass production but also reduces the need for series or parallel electrode tabs, thereby lowering energy density loss due to space constraints. Furthermore, the strip-shaped current collector layer design allows for the direct patterning of active material layers and the frame for mass production, facilitating mass production.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. An electrode assembly comprising: A first strip current collector layer and a second strip current collector layer; Multiple electrochemical systems are directly sandwiched between the first strip current collector layer and the second strip current collector layer; A frame has multiple open slots, and the electrochemical system is located in the open slots. One layer of the frame is adhered to the first strip current collector layer, and another layer of the frame is adhered to the second strip current collector layer. The frame, the first strip current collector layer, and the second strip current collector layer completely enclose each electrochemical system, so that each electrochemical system is independent of each other and there is only charge transfer without electrochemical reaction. as well as Multiple bends, each bend being formed by bending together a frame located between two adjacent electrochemical systems and the first and second strip current collectors adhered to the frame, so that the multiple electrochemical systems are stacked on top of each other. Each of these electrochemical systems comprises: A first active material layer is in contact with the first strip-shaped current collector layer; A second active material layer is in contact with the second strip-shaped current collector layer; as well as A diaphragm is disposed between the first active material layer and the second active material layer.

2. The electrode assembly of claim 1, wherein the bends cause the electrochemical systems to be connected in parallel in a zigzag vertical stack along the same axis.

3. The electrode assembly according to claim 1 further includes a heat dissipation current collector having a body and a plurality of extensions extending from the body, the extensions being disposed between the stacked electrochemical systems and in contact with the outer surface of the first strip current collector or the second strip current collector.

4. The electrode assembly according to claim 1, wherein the first active material layer and the second active material layer are impregnated with an electrolyte system, the electrolyte system being a colloidal, liquid, solid electrolyte or a combination thereof.

5. The electrode assembly of claim 4, wherein the electrolyte systems of the electrochemical systems are isolated from each other by the encapsulation of the film frame.

6. The electrode assembly according to claim 1, wherein the adhesive frame comprises a silicone layer and two modified silicone layers on both sides of the silicone layer, wherein one of the modified silicone layers is bonded to the first strip current collector layer, and the other modified silicone layer is bonded to the second strip current collector layer.

7. The electrode assembly according to claim 1, wherein at least one of the first strip current collector layers and the second strip current collector layer further includes a stress reinforcing member on its outer side to increase the structural stress of the first strip current collector layer or the second strip current collector layer.

8. The electrode assembly according to claim 7, wherein the stress-reinforcing material is selected from polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PC), polystyrene (PS), polyimide, nylon, polyethylene terephthalate, polyurethane, acrylic, epoxy resin, silicone, and combinations thereof.

9. The electrode assembly according to claim 1, wherein the first strip current collector layer and the second strip current collector layer each have a conductive handle, and the two conductive handles are located on opposite sides of the electrode assembly.

10. The electrode assembly according to claim 1, wherein the first strip current collector layer and the second strip current collector layer each have a conductive handle, and the two conductive handles are located on the same side of the electrode assembly.

11. The electrode assembly according to claim 1, wherein the electrochemical system comprises an odd number of components.

12. The electrode assembly according to claim 1, wherein the electrochemical system comprises an even number of components.

13. A battery device comprising an electrode assembly as described in claim 1, comprising a housing.

14. The battery device of claim 13, wherein a heat dissipation agent or a flame retardant is filled between the housing and the electrode assembly.

15. The battery device of claim 13, wherein the housing is an aluminum cladding or an outer shell composed of an upper shell and a lower shell.

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