Separator-free battery

Abstract

The utility model relates to a diaphragm-free battery. The diaphragm-free battery comprises: an electrode assembly comprising an electrode plate, the electrode plate comprises an electrode plate and a ceramic coating, the ceramic coating is arranged on the electrode plate, and the electrode plate is divided into a positive electrode plate and a negative electrode plate; the insulation assembly is used for achieving isolation and insulation between the electrodes, the electrode plate is arranged on the insulation assembly and comprises an insulation frame, the insulation frame is provided with a separation sheet, the separation sheet and the insulation frame form an electrode plate containing cavity, the electrode plate is arranged in the electrode plate containing cavity, and a ceramic coating of the electrode plate abuts against the separation sheet. And the length and the width of the electrode plate are respectively the same as the cavity length and the cavity width of the electrode plate accommodating cavity. According to the invention, short circuit between the electrode plates can be prevented, the risk of electric leakage is reduced, the safety is improved, the contact area of the electrodes is increased, the overall energy density and conversion efficiency are improved, and the condition of electrode displacement or deformation caused by size mismatching is avoided.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a separatorless battery. Background Technology

[0002] Lithium-ion batteries, as the mainstream energy storage devices, are widely used in electric vehicles, consumer electronics, and renewable energy storage. Their basic working principle involves the charging and discharging of energy through the insertion and extraction of lithium ions. In this process, the separator, as a crucial component of the battery, plays a vital role. The separator's main function is to physically isolate the positive and negative electrodes to prevent short circuits, while allowing lithium ions to pass freely, ensuring the normal operation of the battery. However, the choice and performance of the separator material directly affect the battery's safety, energy density, and cycle life.

[0003] In related technologies, battery separators typically utilize high-molecular polymer materials such as polyethylene (PE) and polypropylene (PP). Optimized porous structure design increases porosity to improve ionic conductivity. Furthermore, the introduction of ceramic composite materials enhances the separator's thermal stability and puncture resistance.

[0004] However, in related technologies, separator materials are prone to melting and shrinkage under high temperatures, which can lead to internal short circuits in the battery and potentially thermal runaway, jeopardizing battery safety. Secondly, the manufacturing process of existing separators is complex; continuous improvements in material selection and coating technology mean higher production costs, and consistent quality control is difficult to achieve during mass production. Furthermore, separators may be subjected to mechanical stress during battery assembly and use, leading to cracking or deformation. Utility Model Content

[0005] Therefore, it is necessary to provide a membraneless battery that can fix the electrode plates and isolate the edges of the electrode plates to avoid short circuits, in order to address the above-mentioned technical problems.

[0006] This application provides a separatorless battery, comprising:

[0007] An electrode assembly includes an electrode sheet, the electrode sheet comprising an electrode plate and a ceramic coating, the ceramic coating being disposed on the electrode plate, and the electrode sheet being divided into a positive electrode sheet and a negative electrode sheet;

[0008] An insulating component is used to achieve isolation and insulation between electrodes. Electrode sheets are placed on the insulating component, which includes an insulating frame. The insulating frame is provided with a separating sheet. The separating sheet and the insulating frame form an electrode receiving cavity. The electrode sheets are placed in the electrode receiving cavity. The ceramic coating of the electrode sheets abuts against the separating sheet. The length and width of the electrode sheets are the same as the length and width of the electrode receiving cavity, respectively.

[0009] In one embodiment, the insulating frame further includes a tab placement area, which is connected to the receiving cavity, and the tabs of the electrode plates are placed in the tab placement area.

[0010] The separator sheet is positioned in the non-tab placement area of ​​the insulating frame.

[0011] In one embodiment, the tab placement area includes a tab placement groove, in which the tab sheet is placed, and the bottom of the tab placement groove is on the same plane as the same side surface of the separating sheet.

[0012] In one embodiment, when an electrode tab placement area is provided in the insulating frame, an electrode receiving cavity is provided, and the first surface of the separating sheet is on the same plane as the first surface of the insulating frame.

[0013] The electrode receiving cavity houses either a positive electrode or a negative electrode, with the ceramic coating of either the positive or negative electrode abutting against the second surface of the separating sheet.

[0014] In one embodiment, the sum of the thickness of the electrode sheet and the thickness of the separator sheet is equal to the thickness of the insulating frame.

[0015] In one embodiment, when there are two electrode placement areas in the insulating frame, the separator divides the electrode receiving cavity into a positive electrode receiving cavity and a negative electrode receiving cavity.

[0016] The ceramic coating of the positive electrode sheet abuts against the first side of the separator sheet, and the ceramic coating of the negative electrode sheet abuts against the second side of the separator sheet.

[0017] In one embodiment, the sum of the thickness of the positive electrode, the thickness of the negative electrode, and the thickness of the separator sheet is equal to the thickness of the insulating frame.

[0018] In one embodiment, the electrode plate includes an electrode current collector and an electrode coating layer, the electrode coating layer being disposed on the electrode current collector and the ceramic coating layer being disposed on the electrode coating layer.

[0019] In one embodiment, the positive electrode includes a positive electrode coating layer, and the negative electrode includes a negative electrode coating layer;

[0020] The length of the negative electrode coating is greater than the length of the positive electrode coating, and the width of the negative electrode coating is greater than the width of the positive electrode coating.

[0021] In one embodiment, the membraneless battery comprises a non-aqueous liquid electrolyte solution.

[0022] The aforementioned membrane-free battery, by setting a separator sheet in the insulating frame, forms an electrode receiving cavity to facilitate the placement of the electrode sheets. The insulating frame, in which the electrode sheets are placed, can withstand a certain degree of external pressure and heat during use, thus providing the battery's durability. Furthermore, the insulating frame isolates the positive and negative electrode sheets, and the ceramic coating of the electrode sheets abuts against the separator sheet, effectively preventing short circuits between the electrode sheets, reducing the risk of leakage, and improving safety. The size of the electrode receiving cavity matches the length and width of the electrode sheets, increasing the contact area of ​​the electrodes, which helps to improve the overall energy density and conversion efficiency, and avoids electrode displacement or deformation due to size mismatch. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of an insulating frame provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of an insulating frame provided in another embodiment of this application;

[0027] Figure 4 This is a schematic flowchart of a method for manufacturing a membraneless battery according to an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10 - Battery cell, 110 - Electrode plate, 120 - Insulating frame;

[0030] 111 - Positive electrode plate, 112 - Negative electrode plate;

[0031] 121-Separating sheet, 122-Electrode placement area, 123-Electrode placement groove. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] The applicant notes that in lithium-ion batteries, the separator's role is to physically isolate the positive and negative electrodes to prevent short circuits, while allowing lithium ions to pass through for ion migration during charging and discharging. However, typical separators are made of polymers, which may shrink or melt under high temperatures, leading to internal short circuits and thermal runaway. Furthermore, the separator increases internal resistance, affecting battery performance. Separator materials need to possess good insulation, mechanical strength, and chemical stability, but these properties are difficult to achieve perfectly in a single material, limiting separator selection and design. Additionally, separator manufacturing requires sophisticated processes, and material selection and coating technologies are still under development, increasing manufacturing costs and complexity. During battery assembly and use, the separator may be subjected to mechanical stress, leading to cracking or deformation and potentially causing internal short circuits.

[0039] Based on the above, to avoid electrode displacement or deformation due to size mismatch, which could lead to short circuits between electrode plates, a separatorless battery is provided. This separatorless battery includes several battery cells 10. (See also...) Figure 1 , Figure 1 A schematic diagram of the structure of a battery cell 10 provided in one embodiment is shown. The battery cell 10 includes an electrode assembly and an insulating assembly, with the electrode plates 110 disposed on the insulating assembly.

[0040] The insulation assembly includes an insulation frame 120. See also... Figure 2 and Figure 3 , Figure 2 A schematic diagram of the structure of an insulating frame 120 provided in one embodiment is shown. Figure 3 A schematic diagram of an insulating frame 120 according to another embodiment is shown. The insulating frame 120 is provided with a partition sheet 121, and the insulating frame 120 and the partition sheet 121 form an electrode receiving cavity, in which the electrode electrode 110 is disposed. Figure 1 The length of the electrode receiving cavity is the same as the length of the electrode electrode 110, and the width of the electrode receiving cavity is the same as the width of the electrode electrode 110. In some embodiments, the insulating frame 120 is an insulating frame rubber ring, which is electrochemically inert and can maintain its structure and function without damage during battery charge and discharge cycles, thereby ensuring the safety and reliability of the battery. The materials used include, but are not limited to, rubber, polybutadiene rubber, polyacrylamide, polyacrylonitrile, polyacrylic acid, carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyvinyl butyral, polyvinylpyrrolidone, polyN-vinyl acetamide, crosslinked acrylic resin, polyurethane, and epoxy resin, and are preferably fluororubber in this application. The insulating frame is a rectangular outer frame with a certain thickness, ranging from 0.5 to 2 mm, preferably 1 mm.

[0041] The battery electrode includes an electrode plate and a ceramic coating, with the ceramic coating disposed on the electrode plate. The ceramic coating of the electrode 110 faces the separator 121 and abuts against the separator 121. The electrode 110 is divided into a positive electrode 111 and a negative electrode 112.

[0042] The aforementioned membrane-free battery, by setting a separator sheet 121 in the insulating frame 120, forms an electrode receiving cavity to facilitate the placement of the electrode sheets 110. The insulating frame 120, on which the electrode sheets 110 are placed, can withstand a certain degree of external pressure and heat during use, thus improving the battery's durability. Furthermore, the insulating frame 120 isolates the positive electrode sheet 111 and the negative electrode sheet 112. The ceramic coating of the electrode sheet 110 abuts against the separator sheet 121, effectively preventing short circuits between the electrode sheets 110, reducing the risk of leakage, and improving safety. The size of the electrode receiving cavity matches the length and width of the electrode sheet 110, increasing the contact area of ​​the electrode, which helps to improve the overall energy density and conversion efficiency, and avoids electrode displacement or deformation due to size mismatch.

[0043] In some embodiments, continue reading Figure 2 and Figure 3The insulating frame 120 also includes a tab placement groove 123, which extends outward from the tab placement area 122. The electrode receiving cavity formed by the insulating frame 120 and the separating sheet 121 communicates with the tab placement area 122, and the tabs of the electrode plates 110 are positioned corresponding to the tab placement area 122. The separating sheet 121 is located in the non-tab placement area 122 of the insulating frame; that is, no separating sheet 121 is provided in the tab placement area 122 of the insulating frame 120. In one embodiment, the separating sheet 121 and the insulating frame 120 are an integrated structure, with the separating sheet 121 located on the inner wall of the insulating frame. The length of the separating sheet 121 is 0.5-3 mm, and preferably 2 mm.

[0044] At the protruding part of the electrode tab, the rectangular outer frame and the inner sheet need to be hollowed out to prevent the electrode tab from being exposed. At the same time, the outer frame at this position also needs to extend outward to accommodate the protruding electrode tab and provide it with support and positioning.

[0045] The tab placement area 122 includes a tab placement groove 123, in which the tab is placed. The bottom of the tab placement groove 123 is on the same plane as the same side surface of the separating sheet 121.

[0046] In some embodiments, continue reading Figure 2 When an electrode placement area 122 is provided in the insulating frame 120, an electrode receiving cavity is provided, and the first surface of the separating sheet 121 is on the same plane as the first surface of the insulating frame 120.

[0047] When the positive electrode 111 is placed in the electrode receiving cavity, the ceramic coating of the positive electrode 111 abuts against the second surface of the separating sheet 121. Or

[0048] When the negative electrode 112 is placed in the electrode receiving cavity, the ceramic coating of the negative electrode 112 abuts against the second surface of the separating sheet 121.

[0049] When a positive electrode 111 or a negative electrode 112 is placed in the electrode receiving cavity, the depth of the electrode receiving cavity is the same as the thickness of the electrode 110, that is, the sum of the thickness of the electrode 110 and the thickness of the separating sheet 121 is equal to the thickness of the insulating frame 120.

[0050] In some embodiments, continue reading Figure 3 When there are two electrode placement areas 122 in the insulating frame 120, the separating sheet 121 and the insulating frame 120 form two electrode receiving cavities, which are the positive electrode receiving cavity and the negative electrode receiving cavity, respectively.

[0051] At this time, the ceramic coating of the positive electrode 111 abuts against the first side of the separator 121, and the ceramic coating of the negative electrode abuts against the second side of the separator 121. Simultaneously, the sum of the thicknesses of the positive electrode 111, the negative electrode 112, and the separator 121 equals the thickness of the insulating frame 120.

[0052] In some embodiments, the electrode plate includes an electrode current collector and an electrode coating layer, the electrode coating layer being disposed on the electrode current collector, and a ceramic coating being disposed on the electrode coating layer. The coating layer comprises a mixture of an active material, a conductive agent, and a binder. The electrode 112 includes a positive electrode coating layer and a negative electrode 112 includes a negative electrode coating layer. The positive electrode coating layer comprises a positive electrode material mixture of an active material, a conductive agent, and a binder, and the negative electrode 112 comprises a negative electrode material mixture of a negative electrode active material, a conductive agent, and a binder.

[0053] Furthermore, the length of the negative electrode coating layer is greater than the length of the positive electrode coating layer, and the width of the negative electrode coating layer is greater than the width of the positive electrode coating layer. In an exemplary embodiment, a separatorless battery is provided, which includes a plurality of battery cells 10. The battery cell 10 includes an electrode assembly and an insulating assembly, with electrode plates 110 disposed on the insulating assembly. An insulating frame 120 is provided with a separating sheet 121, and the insulating frame 120 and the separating sheet 121 form an electrode receiving cavity, in which the electrode plates 110 are disposed. The cavity length of the electrode receiving cavity is the same as the plate length of the electrode plate 110, and the cavity width of the electrode receiving cavity is the same as the plate width of the electrode plate 110.

[0054] The insulating frame also includes a tab placement groove 123, and the insulating frame 120 extends outward at the tab placement area 122. The electrode receiving cavity formed by the insulating frame 120 and the separating sheet 121 communicates with the tab placement area 122, and the electrode tabs of the electrode sheet 110 are placed corresponding to the tab placement area 122. The separating sheet 121 is located in the non-tab placement area 122 of the insulating frame, meaning that the tab placement area 122 of the insulating frame 120 does not have a separating sheet 121. In the extended portion of the tab, the rectangular outer frame and the inner sheet need to be hollowed out to prevent the tab from protruding. Simultaneously, the outer frame at this location also needs to extend outward to accommodate the extended tab and provide support and positioning.

[0055] The tab placement area 122 includes a tab placement groove 123, in which the electrode tab is placed. The bottom of the tab placement groove 123 is on the same plane as the same side surface of the separator sheet 121. An electrode receiving cavity is provided, with the first surface of the separator sheet 121 on the same plane as the first surface of the insulating frame 120. When a positive electrode 111 is placed in the electrode receiving cavity, the ceramic coating of the positive electrode 111 abuts against the second surface of the separator sheet 121. Alternatively, when a negative electrode 112 is placed in the electrode receiving cavity, the ceramic coating of the negative electrode 112 abuts against the second surface of the separator sheet 121. Therefore, when either the positive electrode 111 or the negative electrode 112 is placed in the electrode receiving cavity, the depth of the electrode receiving cavity is the same as the thickness of the electrode 110, meaning the sum of the thickness of the electrode 110 and the thickness of the separator sheet 121 equals the thickness of the insulating frame 120.

[0056] The battery electrode includes an electrode plate and a ceramic coating, with the ceramic coating disposed on the electrode plate. The ceramic coating of the electrode 110 faces the separator 121 and abuts against the separator 121. The electrode 110 is divided into a positive electrode 111 and a negative electrode 112.

[0057] The electrode plate includes an electrode current collector and an electrode coating layer. The electrode coating layer is disposed on the electrode current collector, and a ceramic coating layer is disposed on the electrode coating layer. The coating layer comprises a mixture of active material, conductive agent, and binder. The electrode includes a positive electrode coating layer, and the negative electrode 112 includes a negative electrode coating layer. The positive electrode coating layer comprises a positive electrode material mixture of active material, conductive agent, and binder, and the negative electrode 112 comprises a negative electrode material mixture of negative active material, conductive agent, and binder.

[0058] Furthermore, the length of the negative electrode coating layer is greater than the length of the positive electrode coating layer, and the width of the negative electrode coating layer is greater than the width of the positive electrode coating layer.

[0059] In one exemplary embodiment, a separatorless battery is provided, comprising a plurality of battery cells 10. Each battery cell 10 includes an electrode assembly and an insulating assembly, with electrode plates 110 disposed on the insulating assembly. An insulating frame 120 is provided with a separating sheet 121, and the insulating frame 120 and the separating sheet 121 form an electrode receiving cavity, within which the electrode plates 110 are disposed. The length of the electrode receiving cavity is the same as the length of the electrode plate 110, and the width of the electrode receiving cavity is the same as the width of the electrode plate 110.

[0060] The insulating frame also includes a tab placement groove 123, and the insulating frame 120 extends outward at the tab placement area 122. The electrode receiving cavity formed by the insulating frame 120 and the separating sheet 121 communicates with the tab placement area 122, and the electrode tabs of the electrode sheet 110 are placed corresponding to the tab placement area 122. The separating sheet 121 is located in the non-tab placement area 122 of the insulating frame, meaning that the tab placement area 122 of the insulating frame 120 does not have a separating sheet 121. In the extended portion of the tab, the rectangular outer frame and the inner sheet need to be hollowed out to prevent the tab from protruding. Simultaneously, the outer frame at this location also needs to extend outward to accommodate the extended tab and provide support and positioning.

[0061] The tab placement area 122 includes two tab placement slots 123. A separator sheet 121 and an insulating frame 120 form two electrode receiving cavities, which are respectively a positive electrode receiving cavity and a negative electrode receiving cavity. At this time, the ceramic coating of the positive electrode 111 abuts against the first surface of the separator sheet 121, and the ceramic coating of the negative electrode abuts against the second surface of the separator sheet 121. Simultaneously, the sum of the thickness of the positive electrode 111, the thickness of the negative electrode 112, and the thickness of the separator sheet 121 is equal to the thickness of the insulating frame 120.

[0062] The battery electrode includes an electrode plate and a ceramic coating, with the ceramic coating disposed on the electrode plate. The ceramic coating of the electrode 110 faces the separator 121 and abuts against the separator 121. The electrode 110 is divided into a positive electrode 111 and a negative electrode 112.

[0063] The electrode plate includes an electrode current collector and an electrode coating layer. The electrode coating layer is disposed on the electrode current collector, and a ceramic coating layer is disposed on the electrode coating layer. The coating layer comprises a mixture of active material, conductive agent, and binder. The electrode includes a positive electrode coating layer, and the negative electrode 112 includes a negative electrode coating layer. The positive electrode coating layer comprises a positive electrode material mixture of active material, conductive agent, and binder, and the negative electrode 112 comprises a negative electrode material mixture of negative active material, conductive agent, and binder.

[0064] Furthermore, the length of the negative electrode coating layer is greater than the length of the positive electrode coating layer, and the width of the negative electrode coating layer is greater than the width of the positive electrode coating layer.

[0065] In one exemplary embodiment, such as Figure 4 As shown, this application provides a method for manufacturing a separatorless battery, which is applicable to the separatorless battery described in any of the above embodiments, and includes:

[0066] Step 402: Apply a ceramic coating to the surface of the electrode plate to obtain an electrode sheet.

[0067] The electrode plates are divided into positive electrode plates and negative electrode plates.

[0068] For example, a mixture of positive electrode materials, including a positive electrode active material, a conductive agent, and a binder, is coated onto a current collector to form a positive electrode coating layer, resulting in an electrode plate with a current collector and a positive electrode active material stacked together. A ceramic slurry is then coated onto the positive electrode surface to fabricate a positive electrode sheet, with a ceramic coating thickness of 2 μm. Typically, the thickness of a positive electrode sheet is 18-25 μm.

[0069] Similarly, the negative electrode 112 adopts the same method.

[0070] Step 404: Cut the electrode sheet according to the preset electrode sheet parameters to obtain the target positive electrode sheet and the target negative electrode sheet;

[0071] For example, the positive and negative electrode sheets are cut to the required size to obtain a target-sized positive electrode sheet and a target-sized negative electrode sheet for assembling a battery.

[0072] Step 406: Assemble the negative electrode, insulating frame and positive electrode stacked in sequence to obtain a membrane-free battery.

[0073] For example, the negative electrode 112 is first adsorbed onto the worktable using a suction cup, and then the insulating frame is adsorbed and stacked onto the negative electrode 112, so that the negative electrode is placed in the negative electrode placement area of ​​the insulating frame. Finally, the positive electrode 111 is adsorbed and stacked onto the positive electrode 111 placement area of ​​the insulating frame. The negative electrode 112, the insulating frame and the positive electrode 111 are stacked from bottom to top; stacking and packaging are performed.

[0074] Furthermore, the membrane-free battery may contain a non-aqueous liquid electrolyte solution, which may include lithium salts dissolved in an organic solvent or a mixture of organic solvents. Many conventional non-aqueous liquid electrolyte solutions can be used in the battery.

[0075] Suitable lithium salts typically possess inert anions. A non-limiting list of lithium salts that can dissolve in organic solvents or mixtures of organic solvents to form non-aqueous liquid electrolyte solutions includes: lithium hexafluorophosphate (LiPF6); lithium perchlorate (LiClO4), lithium tetrachloroaluminate (LiAlCl4), lithium iodide (LiI), lithium bromide (LiBr), lithium thiocyanate (LiSCN), lithium tetrafluoroborate (LiBF4), lithium difluorooxalate borate (LiBF2(C2O4)) (LiODFB), lithium tetraphenylborate (LiB(C6H5)2) (LiODFB), and lithium tetraphenylborate (LiB(C6H5)2) (LiODFB). 4) Lithium bis(oxalate)borate (LiB(C2O4)2) (LiBOB), lithium tetrafluorooxalate phosphate (LiPF4(C2O4)) (LiFOP), lithium nitrate (LiNO3), lithium hexafluoroarsenate (LiAsF6), lithium trifluoromethanesulfonate (LiCF3SO3), lithium bis(trifluoromethanesulfonylimide) (LITFSI) (LiN(CF3SO2)2), lithium bis(fluorosulfonylimide) (LiN(FSO2)2) (LIFSI), and combinations thereof. In some variations, the lithium salt is selected from lithium hexafluorophosphate (LiPF6), lithium bis(trifluoromethanesulfonylimide) (LiTFSI) (LiN(CF3SO2)2), lithium bis(fluorosulfonylimide) (LiN(FSO2)2) (LiFSI), lithium fluoroalkylphosphonate (LiFAP), lithium phosphate (Li3PO4), and combinations thereof.

[0076] These and other similar lithium salts are soluble in a variety of organic solvents, including but not limited to various alkyl carbonate esters such as cyclic carbonates (e.g., ethylene carbonate (EC), propylene carbonate (PC), butyl carbonate (BC), fluoroethylene carbonate (FEC)), linear carbonates (e.g., dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC)), aliphatic carboxylic acid esters (e.g., methyl formate, methyl acetate, methyl propionate), γ-lactones (e.g., γ-butyrolactone, γ-valerolactone), chain ethers (e.g., 1,2-dimethoxyethane (DME), 1,2-diethoxyethane, ethoxymethoxyethane), cyclic ethers (e.g., tetrahydrofuran, 2-methyltetrahydrofuran), 1,3-dioxolane (DOL), sulfur compounds (e.g., sulfolane), and combinations thereof. In various aspects, electrolyte 50 may comprise a concentration of one or more of the lithium salts greater than or equal to 1 M to less than or equal to about 2 M. In some variations, such as when the electrolyte has a lithium concentration greater than about 2 M or has an ionic liquid, the electrolyte 50 may include one or more diluents, such as fluoroethylene carbonate (FEC) and / or hydrofluoroether (HFE).

[0077] Afterwards, the packaged wafers undergo baking, liquid injection, sealing, formation, aging, testing, and quality inspection to obtain the product.

[0078] Furthermore, the battery cell 10 structure and battery manufacturing method described in any of the above embodiments can also be applied to solid-state batteries without separators, by combining the solid electrolyte layer with the positive or negative electrode and then assembling them according to the assembly sequence described above.

[0079] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," "ideal embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A separatorless battery, characterized in that, It includes several battery cells, said battery cell comprising: An electrode assembly includes an electrode sheet, the electrode sheet comprising an electrode plate and a ceramic coating, the ceramic coating comprising a solid electrolyte disposed on the electrode plate, and the electrode sheet being divided into a positive electrode sheet and a negative electrode sheet; An insulating component is provided for isolating and insulating the electrode edge. The electrode sheet is disposed on the insulating component and includes an insulating frame. The insulating frame is provided with a separating sheet. The separating sheet and the insulating frame form an electrode receiving cavity. The electrode sheet is disposed in the electrode receiving cavity. The ceramic coating of the electrode sheet abuts against the separating sheet. The length and width of the electrode sheet are the same as the length and width of the electrode receiving cavity, respectively.

2. The membraneless battery according to claim 1, characterized in that, The insulating frame further includes an electrode tab placement area, which is connected to the accommodating cavity, and the electrode tabs of the electrode plates are arranged corresponding to the electrode tab placement area; The separating sheet is disposed in the non-tab placement area of ​​the insulating frame.

3. The membraneless battery according to claim 2, characterized in that, The electrode placement area includes an electrode placement groove, in which the electrode tab is placed. The bottom of the electrode placement groove is on the same plane as the same side surface of the separating sheet.

4. The separatorless battery according to claim 3, characterized in that, When there is one electrode tab placement area in the insulating frame, there is one electrode receiving cavity, and the first surface of the separating sheet is on the same plane as the first surface of the insulating frame; The electrode receiving cavity is provided with either a positive electrode or a negative electrode, and the ceramic coating of the positive electrode or the ceramic coating of the negative electrode abuts against the second surface of the separating sheet.

5. The membraneless battery according to claim 4, characterized in that, The sum of the thickness of the electrode sheet and the thickness of the separating sheet is equal to the thickness of the insulating frame.

6. The membraneless battery according to claim 3, characterized in that, When there are two electrode placement areas in the insulating frame, the separator sheet divides the electrode receiving cavity into a positive electrode receiving cavity and a negative electrode receiving cavity. The ceramic coating of the positive electrode abuts against the first side of the separator sheet, and the ceramic coating of the negative electrode abuts against the second side of the separator sheet.

7. The membraneless battery according to claim 6, characterized in that, The sum of the thickness of the positive electrode, the thickness of the negative electrode, and the thickness of the separator sheet is equal to the thickness of the insulating frame.

8. The membraneless battery according to claim 1, characterized in that, The electrode plate includes an electrode current collector and an electrode coating layer, wherein the electrode coating layer is disposed on the electrode current collector and the ceramic coating layer is disposed on the electrode coating layer.

9. The membraneless battery according to claim 8, characterized in that, The positive electrode includes a positive electrode coating layer, and the negative electrode includes a negative electrode coating layer; The length of the negative electrode coating layer is greater than the length of the positive electrode coating layer, and the width of the negative electrode coating layer is greater than the width of the positive electrode coating layer.

10. The separatorless battery according to claim 1, characterized in that, The membraneless battery includes a non-aqueous liquid electrolyte solution.

Images