Upper and lower surface meshing microstructure battery cell, battery and manufacturing method

Abstract

The present invention relates to the technical field of batteries, and specifically discloses an upper and lower surface meshing microstructured battery cell, a battery and a manufacturing method thereof. The upper and lower surface meshing microstructured battery cell includes: a first substrate, a second substrate, a first electrode, a second electrode, a first current collector and a second current collector; one side of the first current collector is in contact with the lower surface of the first substrate, and the other side of the first current collector is provided with the first electrode. One side of the second current collector is in contact with the upper surface of the first substrate, and the other side of the second current collector is provided with the second electrode; the first electrode and the second electrode are in a two-dimensional distribution structure and are meshed with each other, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane. In the present invention, by meshing the first electrode and the second electrode, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane, the risk of positive and negative electrode contact short circuit is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to an upper and lower surface meshing microstructure battery cell, a battery and a manufacturing method thereof. Background Art

[0002] With the emerging development of flexible electronics, corresponding flexible power supply devices have received increasing attention. Compared with traditional flexible pouch batteries, flexible batteries with electrode layers and collector layers directly integrated on the battery package have lower material costs and process costs, as well as higher production speeds.

[0003] In new thin-film battery structures, the sandwich battery structure with a separator and the coplanar battery structure with two electrodes on the same plane, as two mainstream structures, have different advantages and disadvantages. In the sandwich battery structure, the two electrodes are oppositely arranged and insulated from each other by a separator to conduct electricity, so the capacitance per unit area is relatively high, but the structure and production process are relatively complex; in the coplanar battery structure, the two electrodes are physically separated, so the separator can be omitted, and the pattern design is more flexible, but due to the reduced electrode coverage area, compared with the sandwich structure battery, the capacitance is lower and the battery internal resistance is larger.

[0004] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main object of the present invention is to provide an upper and lower surface meshing microstructure battery cell, a battery and a manufacturing method thereof, aiming to solve the technical problem of reducing the battery internal resistance while eliminating the risk of short circuit between the positive and negative electrodes of the non-separator sandwich structure battery in the prior art.

[0006] To achieve the above object, the present invention proposes an upper and lower surface meshing microstructure battery cell, which includes: a first electrode, a second electrode, a first collector, a second collector, a first substrate and a second substrate;

[0007] Wherein, one side of the first collector is in contact with the lower surface of the first substrate, and the first electrode is provided on the other side of the first collector; one side of the second collector is in contact with the upper surface of the first substrate, and the second electrode is provided on the other side of the second collector; the first electrode and the second electrode are opposite polarity electrodes, and they are two-dimensional distributed structures and are meshed with each other, and there is an isolation area between the projections of the first electrode and the second electrode on the same plane.

[0008] Optionally, a first isolation line and / or a second isolation line are / is provided in the isolation area; the first isolation line is provided on the lower surface of the first substrate, and the second isolation line is provided on the upper surface of the second substrate.

[0009] Optionally, the first isolation line and / or the second isolation line is a porous layer, the porous layer does not cover or partially covers the first collector and / or the second collector, and the porous layer has a certain thickness and rigidity.

[0010] Optionally, the first isolation line and / or the second isolation line is a hydrophobic layer;

[0011] The hydrophobic layer extends to the projection area of the anti-polarity electrode on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the anti-polarity electrode;

[0012] The polarity of the anti-polarity electrode is opposite to the polarity of the electrode on the same substrate as the hydrophobic layer.

[0013] Optionally, a porous layer is further provided on the hydrophobic layer, and there is no overlapping area between the porous layer and the projection of the anti-polarity electrode on the same substrate.

[0014] Optionally, the first isolation line and / or the second isolation line is an adhesive layer;

[0015] The adhesive layer extends to the projection area of the anti-polarity electrode on the substrate where the adhesive layer is located, and the adhesive layer partially or completely covers the anti-polarity electrode;

[0016] The polarity of the anti-polarity electrode is opposite to the polarity of the electrode on the same substrate as the adhesive layer.

[0017] Optionally, one of the first isolation line and the second isolation line is an adhesive layer, and the other isolation line is a hydrophobic layer;

[0018] The hydrophobic layer extends to the projection area of the anti-polarity electrode on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the anti-polarity electrode;

[0019] When the hydrophobic layer is a smooth hydrophobic layer, the adhesive layer is not bonded to the hydrophobic layer.

[0020] In addition, to achieve the above object, the present invention also provides an upper and lower meshing micro-structure battery, the upper and lower meshing micro-structure battery includes: a sealing glue frame and the upper and lower meshing micro-structure battery core, and the upper and lower meshing micro-structure battery core is disposed in the sealing glue frame; when the isolation line in the isolation area is an adhesive layer, the sealing glue frame and the isolation line are made of the same material.

[0021] In addition, to achieve the above object, the present invention also provides a method for manufacturing an upper and lower meshing micro-structure battery, the method for manufacturing an upper and lower meshing micro-structure battery includes:

[0022] A hydrophobic layer is provided in the non-electrode regions on the first substrate and the second substrate by printing or spraying, and the hydrophobic layer completely covers the non-electrode regions;

[0023] A collector electrode and an electrode are respectively printed or coated in the electrode regions on the first substrate and the second substrate; the first electrode on the first substrate and the second electrode on the second substrate are opposite electrodes to each other, and they are arranged in a two-dimensional distribution structure and are meshed with each other, and there is an isolation region between the projections of the first electrode and the second electrode in the same plane.

[0024] Optionally, after the step of providing the hydrophobic layer in the non-electrode regions on the first substrate and the second substrate by printing or spraying, and the hydrophobic layer completely covers the non-electrode regions, the method further includes:

[0025] When the first electrode and / or the second electrode has good conductivity, inks are respectively placed in the electrode regions on the first substrate and / or the second substrate to dip the corresponding first electrode and / or the second electrode.

[0026] The present invention provides an upper and lower surface meshing micro-structure battery cell, a battery and a manufacturing method thereof. The upper and lower surface meshing micro-structure battery cell includes: a sealing glue frame and an upper and lower surface meshing micro-structure battery cell disposed within the sealing glue frame; the upper and lower surface meshing micro-structure battery cell includes: a first substrate, a second substrate, a first electrode, a second electrode, a first current collector and a second current collector; one side of the first current collector is in contact with the lower surface of the first substrate, and the other side of the first current collector is provided with the first electrode; one side of the second current collector is in contact with the upper surface of the first substrate, and the other side of the second current collector is provided with the second electrode; the first electrode and the second electrode are fractal structures and are meshed with each other, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane. In the present invention, by meshing the first electrode and the second electrode, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane, the relative positions of the upper and lower electrodes are fixed by means of rigid isolation or pasting the opposite substrates, avoiding the risk of contact short circuit of the positive and negative electrodes during battery production assembly and bending applications. In addition, since the two-dimensional distributed micro-structure can fully exert its advantage of reducing internal resistance only at a smaller pattern size, and the mesh number of the screen printing is inevitably limited by the particle size of the electrode active material particles and edge burrs are generated, the present invention avoids the contact of the two electrodes caused by burrs through the hierarchical setting of the isolation layer (i.e., the isolation layer partially covers the current collector). Further, in order to exceed the resolution limit of screen printing (~0.1 mm), the present invention performs a hydrophilic-hydrophobic design on different regions of the substrate, and designs a simple and effective coating process for coating the two-dimensional distributed micro-structure electrode by using the surface tension of the ink. Finally, the present invention also designs positioning holes to further increase the reliability of electrode assembly, and simultaneously sets a sealing glue layer and an isolation wire glue layer to simplify the production steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on the structures shown in these drawings without creative efforts.

[0028] Figure 1 It is an exploded view of the first embodiment of the upper and lower surface meshing micro-structure battery cell of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the first embodiment of the upper and lower surface meshing micro-structure battery cell of the present invention;

[0030] Figure 3 It is a schematic electrode structure diagram of the first embodiment of the upper and lower surface meshing micro-structure battery cell of the present invention;

[0031] Figure 4 Cross-sectional schematic view of the first structure of the second embodiment of the upper and lower meshing microstructure battery cell of the present invention;

[0032] Figure 5 Cross-sectional schematic view of the second structure of the second embodiment of the upper and lower meshing microstructure battery cell of the present invention;

[0033] Figure 6 Cross-sectional schematic view of the third structure of the second embodiment of the upper and lower meshing microstructure battery cell of the present invention;

[0034] Figure 7 Cross-sectional schematic view of the fourth structure of the second embodiment of the upper and lower meshing microstructure battery cell of the present invention;

[0035] Figure 8 Schematic view of the structure of the second embodiment of the upper and lower meshing microstructure battery cell of the present invention with the adhesive layer and the sealant frame provided simultaneously;

[0036] Figure 9 Schematic view of the first process of the manufacturing method of the upper and lower meshing microstructure battery cell of the present invention;

[0037] Figure 10 Schematic view of the second process of the manufacturing method of the upper and lower meshing microstructure battery cell of the present invention.

[0038] Explanation of the reference numerals in the drawings:

[0039] Label Name Label Name 1 First Electrode 2 Second Electrode 3 First Collector 4 Second Collector 5 First Substrate 6 Second Substrate 7 First Isolation Line 8 Second Isolation Line 9 Sealing Glue Frame 11～12 First to Second Electrode Arms 13 Electrode Connection Arm 111～118 First to Eighth Electrode Extension Arms 100 Positioning Hole

[0040] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0043] Referring to Figure 1 , Figure 1 is a schematic view of the structure of the upper and lower meshing microstructure battery cell proposed in the first embodiment of the present invention. In this embodiment, the upper and lower meshing microstructure battery cell includes: a sealant frame and an upper and lower meshing microstructure battery cell disposed within the sealant frame; the upper and lower meshing microstructure battery cell includes: a first electrode 1, a second electrode 2, a first current collector 3, a second current collector 4, a first substrate 5, and a second substrate 6;

[0044] One side of the first collector 3 is disposed on the lower surface of the first substrate 5, and the first electrode 1 is provided on the other side of the first collector 3. One side of the second collector 4 is disposed on the upper surface of the second substrate 6, and the second electrode 2 is provided on the other side of the second collector 4. The first electrode 1 and the second electrode 2 are opposite-polarity electrodes. The first electrode 1 and the second electrode 2 are in a two-dimensional distribution structure, and an isolation region is provided between the first electrode 1 and the second electrode 2.

[0045] It should be noted that the upper and lower meshing microstructural battery core is the part for performing chemical reactions to generate voltage or current. The upper and lower meshing microstructural battery core includes a first electrode 1, a second electrode 2, and an electrolyte capable of completing redox reactions. Of course, it also includes a first collector 3 and a second collector 4 for leading out the generated voltage or current. The collector can lead out the voltage or current obtained from the redox reaction on the electrode by using a tab to connect a lead wire. The sealant frame can form a complete battery housing with the first substrate 5 and the second substrate 6. The first electrode 1 is one of the positive electrode or the negative electrode, and the second electrode 2 is the other electrode, and the polarities of the first electrode 1 and the second electrode 2 are opposite.

[0046] Refer to Figure 2 , it should be understood that the electrode bodies of the first electrode 1 and the second electrode 2 are separated from each other, and the electrode bodies of the first electrode 1 and the second electrode 2 are meshed. Among them, in order to avoid internal short circuit of the battery, the first electrode 1 and the second electrode 2 do not directly contact each other, and there is a certain spacer region between the first electrode 1 and the second electrode 2. Among them, in the physical structure of the battery, the electrode bodies of the first electrode 1 and the second electrode 2 can be arranged in the same plane, and in the case of being in the same plane, there is no contact between the first electrode 1 and the second electrode 2. The two-dimensional distributed electrodes can be in a fractal structure. Since the fractal structure can well cover the entire two-dimensional plane through self-similar shapes, it is convenient to design battery patterns on surfaces of different shapes, and it is beneficial to the export of charges on the basis of increasing the relative electrode surface area. In this embodiment, the fractal structure can be a Peano fractal structure. In practical applications, it can also be other fractal structures, such as Hilbert fractal structure or deformed fractal structure; for special patterns, such as strip patterns, the practical application pattern can be a strip interdigitated pattern. Refer to Figure 2 , in this embodiment, the two-dimensional distributed electrode structure is described as a Peano fractal structure. This structure is only one kind of implementable electrode structure situation. Among them, the structures of the first electrode 1 and the second electrode 2 can also be other structures, including Figure 2 higher-dimensional Peano structures of unit structures.

[0047] Refer to Figure 3, in this embodiment, the first electrode 1 and the second electrode 2 each include a first electrode arm 11, an electrode connection arm 13, and a second electrode arm 12 that are connected in sequence. The first electrode arm 11 and the second electrode arm 12 are disposed opposite to each other; the first electrode 1 and the second electrode 2 are centrosymmetrically arranged. The first electrode arm 11 of the second electrode 2 extends into the space between the first electrode arm 11 and the second electrode arm 12 of the first electrode 1. The first electrode arm 11 of the first electrode 1, the first electrode arm 11 of the second electrode 2, the second electrode arm 12 of the first electrode 1, and the second electrode arm 12 of the second electrode 2 are arranged in sequence. In addition, first to fourth electrode extension arms are provided on the inner sides of the first electrode arms 11 of the first electrode 1 and the second electrode 2; fifth to seventh electrode extension arms are provided on the inner sides of the second electrode arms 12; the first to third electrode extension arms are arranged perpendicular to the first electrode arm 11 to which they are connected in sequence. The fourth electrode extension arm 114 is provided at one end of the second electrode extension arm 112 away from the first electrode arm 11 to which it is connected; the fifth electrode extension arm 115 and the sixth extension arm 116 are arranged perpendicular to the second electrode arm 12 in sequence. The fifth electrode extension arm 115 is flush with one end of the fourth electrode extension arm 114, the sixth electrode extension arm 116 is flush with the other end of the fourth electrode extension arm 114, the seventh electrode extension arm 117 is provided at one end of the sixth electrode extension arm 116, the other end of the sixth electrode extension arm 116 is connected to the second electrode arm 12, one end of the seventh electrode extension arm 117 is flush with the second electrode extension arm 112, and the other end of the seventh electrode extension arm 117 is flush with the third electrode extension arm 113. Eighth electrode extension arms are provided on the inner sides of the electrode connection arms 13 of the first electrode 1 and the second electrode 2; the eighth electrode extension arm 118 provided on the electrode connection arm 13 is perpendicular to the electrode connection arm 13, and one end of the eighth electrode extension arm 118 is connected to the inner side of the electrode connection arm, and the other end is flush with the first connection arm 111. It should be understood that the specific structures of the first electrode 1 and the second electrode 2 are symmetrically arranged with respect to the center points of the electrodes. The first electrode 1 and the second electrode 2 have the same size and the same number of electrode arms, electrode connection arms, and electrode extension arms, and the arrangement manners of the corresponding electrode arms, electrode connection arms, and electrode extension arms are symmetrically arranged with respect to the center points of the electrodes.

[0048] In a specific implementation, the first electrode 1 and the second electrode 2 in the upper and lower meshing microstructure battery cells are respectively disposed on the first current collector 3 and the second current collector 4, and then are respectively disposed on the corresponding first substrate 5 and second substrate 6. And when viewed in projection, there is a certain interval area, i.e., an isolation area, between the first electrode 1 and the second electrode 2. In this embodiment, the upper and lower meshing microstructure battery cells can be added with electrolyte and then encapsulated to form a complete upper and lower meshing microstructure battery.

[0049] In this embodiment, an upper and lower meshing microstructure battery cell is provided. The upper and lower meshing microstructure battery cell includes: a sealing glue frame and a two-dimensional distributed microstructure battery cell disposed in the sealing glue frame. The two-dimensional distributed microstructure is preferably a Peano fractal structure; the two-dimensional distributed microstructure battery cell includes: a first substrate, a second substrate, a first electrode, a second electrode, a first current collector and a second current collector; one side of the first current collector is in contact with the lower surface of the first substrate, and the other side of the first current collector is provided with the first electrode. One side of the second current collector is in contact with the upper surface of the first substrate, and the other side of the second current collector is provided with the second electrode; the first electrode and the second electrode are fractal structures and are meshed with each other, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane. In this embodiment, by designing the first electrode and the second electrode as a two-dimensional distributed structure and meshing them, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane, the risk of positive and negative electrode contact short circuit is avoided, and without setting a separator, the thickness of the battery cell can be further reduced.

[0050] Based on the first embodiment of the above-mentioned upper and lower meshing microstructure battery cell, a second embodiment of the upper and lower meshing microstructure battery cell of the present invention is proposed.

[0051] Refer to Figure 2 and Figure 4 In this embodiment, a first isolation line 7 and / or a second isolation line 8 are / is provided in the isolation area; the first isolation line 7 is disposed on the lower surface of the first substrate 5, and the second isolation line 8 is disposed on the upper surface of the second substrate 6.

[0052] Refer to Figure 2, it should be understood that the isolation region provided between the first electrode 1 and the second electrode 2 can ensure that there is no short circuit between the first electrode 1 and the second electrode 2 when the battery structure remains in its current state. However, in the application scenario where the battery cell structure is bent or when the electrodes undergo relative displacement, there may still be a short circuit between the first electrode 1 and the second electrode 2 within the battery cell. Therefore, in this embodiment, an isolation line can be provided within the isolation region between the first electrode 1 and the second electrode 2. When the structure of the upper and lower meshing micro-structure battery changes, the isolation line within the isolation region can effectively prevent the possible short circuit between the first electrode 1 and the second electrode 2.

[0053] Referring to Figure 4 , it should be noted that one or two isolation lines can be provided within the isolation region. In the case of using two isolation lines, a first isolation line 7 and a second isolation line 8 are provided. The first isolation line 7 can be provided on the lower surface of the first substrate 5. The positional relationship between the first isolation line 7 and the second isolation line with respect to the first collector 3 on the first substrate 5 is not limited, as long as the first isolation line 7 is between the first collector 3 and the second electrode 2; similarly, the second isolation line 8 can be provided on the upper surface of the second substrate 6. In the case of providing only one isolation line, a relatively thick isolation line can be directly provided to directly separate one side of the first electrode 1 and one side of the second electrode 2 within the battery cell. One side of this isolation line is directly connected to the lower surface of the first substrate 5, and the other side is directly connected to the upper surface of the second substrate 6. When the structure of the upper and lower meshing micro-structure battery changes, in the case of providing two isolation lines, the first isolation line 7 can isolate the first collector 3 on the first substrate 5 from the second electrode 2; similarly, the second isolation line 8 can isolate the second collector 4 on the second substrate 6 from the first electrode 1. In the case of using only one isolation line, the isolation line can be a porous structure, and the electrolyte can pass through this isolation line to undergo redox reactions on the corresponding electrodes.

[0054] Referring to Figure 5 , in this embodiment, the first isolation line 7 and / or the second isolation line 8 can be a porous layer, which can directly leave the first collector 3 not covered or partially covered by the first isolation line 7, and the second collector 4 not covered or partially covered by the second isolation line 8. The porous layer has a certain thickness and rigidity.

[0055] It should be understood that, referring to Figure 4, when the isolation line is a porous layer with a certain thickness and rigidity, the porous layer is directly disposed in the isolation region, and the porous layer does not cover the collector. The porous layer with a certain thickness and rigidity can isolate the structures on both sides of the first electrode 1 and the second electrode 2 in the isolation region. During the printing process of the collector and the electrodes, there may be certain burrs. Therefore, during the setting process of the isolation line, the isolation line can also partially cover the corresponding collector to prevent the burrs on the collector from being directly connected to the electrodes with opposite polarities and causing a short circuit. When setting one or two isolation lines, the isolation line can be a porous layer with a certain thickness and rigidity. During the bending process of the battery, the porous layer can generate a certain rigid force by using its own rigidity to prevent the electrodes from directly contacting the collectors with opposite polarities. In addition, during the bending process of the battery, the porous layer with a certain thickness can also cover the collector by using its own thickness to prevent the electrodes from directly contacting the collectors with opposite polarities.

[0056] It should be understood that, in this embodiment, the first isolation line 7 and / or the second isolation line 8 can also be a hydrophobic layer;

[0057] The hydrophobic layer extends to the projection area of the electrode with opposite polarity on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the electrode with opposite polarity;

[0058] Wherein, the polarity of the electrode with opposite polarity is opposite to the polarity of the electrode on the same substrate as the hydrophobic layer. The first isolation line 7 and the first electrode 1 are both on the first substrate 5 at the same time. Therefore, the electrode with opposite polarity corresponding to the first isolation line 7 is the second electrode 2. Similarly, the electrode with opposite polarity corresponding to the second isolation line 8 is the first electrode 1.

[0059] It should be noted that when setting one or two isolation lines, the isolation line can also use a hydrophobic layer as the isolation line. During the printing process of the electrode material, the hydrophobic isolation line can optimize the neatness of the printing of the electrode material by using its own hydrophobicity, so that the printed electrode material is more neat and there are no burrs, avoiding short circuits caused by burrs. During the specific process of setting the isolation line, a porous layer with a certain thickness and rigidity or a hydrophobic isolation line can be selected according to actual needs.

[0060] In addition, in this embodiment, when the first isolation line 7 and / or the second isolation line 8 is a hydrophobic layer, a porous layer can also be directly disposed on the hydrophobic layer, and there is no overlapping area between the projection of the porous layer and the electrode with opposite polarity on the same substrate.

[0061] In this embodiment, the isolation line can also be set by using an adhesive layer material. When there are two isolation lines in the isolation region, they can be named the first adhesive layer and the second adhesive layer for easy distinction. The first isolation line 7 can also be the first adhesive layer, and correspondingly, the second isolation line 8 can be the second adhesive layer.

[0062] It should be understood that during the bending process of the upper and lower meshing microstructure battery, a short circuit may occur between the first electrode 1 and the second electrode 2 because the positions of the electrode, the current collector or the substrate change during the bending process, resulting in contact between one side of the second electrode 2 and one side of the first electrode 1. Therefore, during the setting of the isolation process, the positions of the current collector, the electrode and the substrate can be directly fixed by setting an adhesive glue layer, so as to avoid contact between the current collector and the electrode with opposite polarity. In addition, due to the relatively soft characteristics of the glue layer, using the glue layer as the isolation line can adapt to the bending scenario of the battery. During the printing process of the battery cell core, two glue layers are set as the isolation lines, wherein the first glue layer is arranged between the first substrate 5 and the second electrode 2 to fix the positions of the first substrate 5 and the second electrode 2; the second glue layer is arranged between the second substrate 6 and the first electrode 1 to fix the positions of the second substrate 6 and the first electrode 1. The glue layer is arranged on the first substrate 5 and / or the second substrate 6, and the glue layer extends to the projection area of the electrode with opposite polarity on the substrate where the glue layer is located, and the glue layer partially or completely covers the electrode with opposite polarity.

[0063] In addition, in this embodiment, when there are two isolation lines made of different materials in the isolation area, one of the first isolation line 7 or the second isolation line 8 can be a glue layer, and the other isolation line can be a hydrophobic layer; when the hydrophobic layer is a smooth hydrophobic layer, the glue layer is not adhered to the hydrophobic layer.

[0064] In this case, the glue layer extends to the projection area of the electrode with opposite polarity on the substrate where the glue layer is located, and the glue layer partially or completely covers the electrode with opposite polarity, while the hydrophobic layer extends to the projection area of the electrode with opposite polarity on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the electrode with opposite polarity.

[0065] Refer to Figure 6 and Figure 7 , in this embodiment, the position between the first substrate 5 and the second electrode 2 can be fixed by the glue layer, and then the second substrate 6 and the first electrode 1 can be isolated by using the hydrophobic layer. Of course, in this embodiment, the position between the second substrate 6 and the first electrode 1 can also be fixed by the glue layer, and then the first substrate 5 and the second electrode 2 can be isolated by using the hydrophobic layer. Among them, the hydrophobic layer can be a silicone oil layer composed of silicone oil material. When the area of the isolation area is relatively large, through Figure 6 or Figure 7 's setting method, this can avoid the first substrate 5 and the second substrate 6 being adhered together, resulting in a reduction in the storage space of the electrolyte and a reduction in the battery capacity. In Figure 7In [the above case], when the isolation layer is set as a hydrophobic layer, the isolation lines can be set by spraying through a template. In addition, when the conductivity of the electrode is good enough, there is no need to set a collector electrode, that is, when the electrode and the collector electrode are combined into one layer, a hydrophobic layer substrate can be directly set, exposing the area where the electrode needs to be covered, and then the fractal electrode can be set by scraping or directly dipping, thereby simplifying the setting process and the specific structure of the battery. A glue layer is set at one end inside the battery cell, and a hydrophobic layer is set at the other end, which can effectively prevent the upper and lower substrates from sticking together; the hydrophobic isolation layer can partially or completely cover the counter-polarity electrode.

[0066] In addition, if a hydrophobic layer is not used, a rigid porous layer with a certain thickness can be set on one substrate, and a glue layer can be set on the other substrate, which can further fix the relative positions of the first electrode and the second electrode, and further avoid the situation of short circuit between the electrodes.

[0067] Referring to Figure 8 , in this embodiment, the electrode can be a thin-film electrode. Generally, a sealing structure needs to be set around the thin-film electrode to seal the electrolyte. When the isolation line of the electrode is set as a glue layer, the sealing glue frame can be made of the same material as the isolation line, and during the manufacturing process of the battery structure, the isolation line and the sealing glue frame can be set simultaneously, which can reduce the complexity of the battery manufacturing process to a certain extent.

[0068] In addition, referring to Figure 1 , a preset number of positioning holes 100 are provided at corresponding positions of the first substrate 5 and the second substrate 6. The positioning holes 100 are used to fix the positions of the first substrate 5 and the second substrate 6 during the assembly process. In addition, setting a rigid object in the positioning holes can also fix the relative positions of the electrodes during the bending process. It should be noted that Figure 1 shows two pairs of positioning holes 100. During the specific encapsulation process of the battery, more pairs of positioning holes 100 can be set, and the number of pairs of positioning holes 100 can be set according to the firmness of the battery encapsulation.

[0069] In this embodiment, by setting an isolation line between the first electrode and the second electrode and defining the specific material of the isolation line, it is possible to increase the battery capacity while avoiding short circuits inside the battery due to changes in the battery structure. In addition, by defining the specific structure of the electrode body, the area utilization rate can be more effectively improved, and the battery capacity can be further increased.

[0070] In addition, to achieve the above object, the present invention provides an upper and lower meshing microstructural battery, and the upper and lower meshing microstructural battery includes: a sealant frame and an upper and lower meshing microstructural battery cell disposed within the sealant frame. Since the upper and lower meshing microstructural battery includes the above-mentioned upper and lower meshing microstructural battery cell, all structures of the above-mentioned upper and lower meshing microstructural battery cell are applicable within the upper and lower meshing microstructural battery.

[0071] In addition, to achieve the above object, with reference to Figure 9 , the present invention provides a method for manufacturing an upper and lower meshing microstructural battery cell, and the method for manufacturing an upper and lower meshing microstructural battery cell includes:

[0072] Step S10: A hydrophobic layer is disposed in the non-electrode regions on the first substrate and the second substrate by printing or spraying, and the hydrophobic layer completely covers the non-electrode regions;

[0073] It should be understood that electrode regions and non-electrode regions are usually provided on the substrate, wherein the electrode regions are used to dispose electrode layers, including electrodes and current collectors; specific material structures of isolation lines are usually disposed in the non-electrode regions. The isolation region is within the non-electrode region.

[0074] Step S20: A current collector and an electrode are respectively printed or coated in the electrode regions on the first substrate and the second substrate;

[0075] It should be understood that after the first electrode and the second electrode are disposed, an isolation line may further be disposed in the isolation region between the first electrode and the second electrode. The isolation line is a porous layer having a certain thickness and rigidity, and the porous layer is disposed above the hydrophobic layer to prevent the first electrode and the second electrode from contacting during use. In addition, in the present embodiment, an electrode on one substrate may be directly disposed as an electrode layer containing a hydrophobic layer; for the electrode on the other substrate, without disposing a hydrophobic layer, it may be directly disposed by printing and then the electrode on this substrate is position-fixed with the electrode on the other substrate by disposing an adhesive layer; the electrode layer including the hydrophobic layer and the electrode layer fixed by disposing the adhesive layer are combined within the same battery cell, and the relative positions of the upper and lower electrodes are fixed by the adhesive layer to prevent possible short circuits between the upper and lower electrodes due to changes in the battery cell structure.

[0076] When the conductivity of the electrode is good enough and there is no need to dispose a current collector, that is, when the electrode and the current collector are combined into one layer, with reference to Figure 10 , in the present embodiment, step S20 may further be:

[0077] Step S20': When the conductivity of the first electrode and / or the second electrode is good, corresponding first electrode and / or second electrode are respectively dipped with ink in the electrode regions on the first substrate and / or the second substrate.

[0078] It should be noted that when the conductivity of the electrode is good, conduction can be directly carried out through the electrode. In this case, it is not necessary to set up a collector, and the charge inside the battery can still be led out. Therefore, during the setting process, the first electrode and / or the second electrode with good conductivity can be directly set in the area outside the hydrophobic layer on the corresponding substrate. There is an overlapping area between the projection of the hydrophobic layer and the counter-polarity electrode on the same substrate plane, and the hydrophobic layer partially or completely covers the counter-polarity electrode. Of course, when the conductivity of the electrode on a substrate is good, the electrode can be directly fabricated on this substrate by dipping with ink. When the conductivity of the electrode on the other substrate is poor, the fabrication can be completed by the above-mentioned method of setting the electrode and the collector.

[0079] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

[0080] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

[0081] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0082] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

Claims

1. A top and bottom meshing microstructure battery cell, characterized in that The upper and lower surface meshing microstructure battery cell includes: a first electrode, a second electrode, a first current collector, a second current collector, a first substrate, and a second substrate; Wherein, one side of the first current collector is in contact with the lower surface of the first substrate, the other side of the first current collector is provided with the first electrode, one side of the second current collector is in contact with the upper surface of the second substrate, and the other side of the second current collector is provided with the second electrode; the first electrode and the second electrode are opposite-polarity electrodes, both are two-dimensional distribution structures and are meshed with each other, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane; A first isolation line and / or a second isolation line are provided in the isolation area; the first isolation line is provided on the lower surface of the first substrate, and the second isolation line is provided on the upper surface of the second substrate; The first isolation line and / or the second isolation line partially cover the corresponding current collector, and the first isolation line and / or the second isolation line partially or completely cover the opposite-polarity electrode, preventing burrs on the current collector or the opposite-polarity electrode from causing a short circuit; An electrolyte is also provided in the upper and lower surface meshing microstructure battery cell; The first electrode and the second electrode are fractal structures.

2. The upper and lower surface meshing microstructure battery cell according to claim 1, characterized in that, The first isolation line and / or the second isolation line are porous layers, the porous layers do not cover or partially cover the first current collector and / or the second current collector, and the porous layers have a certain thickness and rigidity.

3. The upper and lower surface meshing microstructure battery cell according to claim 1, characterized in that, The first isolation line and / or the second isolation line are hydrophobic layers; The hydrophobic layer extends to the projection area of the opposite-polarity electrode on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the opposite-polarity electrode; The polarity of the opposite-polarity electrode is opposite to the polarity of the electrode on the same substrate as the hydrophobic layer.

4. The upper and lower surface meshing microstructure battery cell according to claim 3, wherein A porous layer is also provided on the hydrophobic layer, and there is no overlapping area between the porous layer and the projection of the opposite-polarity electrode on the same substrate.

5. The upper and lower surface meshing microstructure battery cell according to claim 1, characterized in that, The first isolation line and / or the second isolation line are adhesive layers; The adhesive layer extends to the projection area of the opposite-polarity electrode on the substrate where the adhesive layer is located, and the adhesive layer partially or completely covers the opposite-polarity electrode; The polarity of the opposite-polarity electrode is opposite to the polarity of the electrode on the same substrate as the adhesive layer.

6. The upper and lower surface meshing microstructure battery cell according to claim 5, characterized in that, One of the first isolation line and the second isolation line is an adhesive layer, and the other isolation line is a hydrophobic layer; The hydrophobic layer extends to the projection area of the opposite-polarity electrode on the substrate where the hydrophobic layer is located, and the hydrophobic layer partially or completely covers the opposite-polarity electrode; When the hydrophobic layer is a smooth hydrophobic layer, the adhesive layer is not bonded to the hydrophobic layer.

7. A battery with upper and lower surface meshing microstructures, characterized in that, The upper and lower surface meshing microstructure battery includes: a sealing rubber frame and the upper and lower surface meshing microstructure battery cell according to any one of claims 1-6, and the upper and lower surface meshing microstructure battery cell is arranged in the sealing rubber frame; when the isolation line in the isolation area is an adhesive layer, the sealing rubber frame and the isolation line are made of the same material.

8. A manufacturing method of an upper and lower surface meshing microstructure battery cell, characterized in that, The manufacturing method of the upper and lower surface meshing microstructure battery cell is used to manufacture the upper and lower surface meshing microstructure battery cell according to any one of claims 1-6; the manufacturing method of the upper and lower surface meshing microstructure battery cell includes: A hydrophobic layer is provided in the non-electrode areas on the first substrate and the second substrate by printing or spraying, and the hydrophobic layer completely covers the non-electrode areas; A collector electrode and an electrode are respectively printed or coated in the electrode areas on the first substrate and the second substrate; the first electrode on the first substrate and the second electrode on the second substrate are opposite electrodes to each other, and they are arranged in a two-dimensional distribution structure and mesh with each other, and there is an isolation area between the projections of the first electrode and the second electrode in the same plane.

9. The manufacturing method of the upper and lower surface meshing microstructure battery cell according to claim 8, characterized in that, After the step of providing the hydrophobic layer in the non-electrode areas on the first substrate and the second substrate by printing or spraying, and the hydrophobic layer completely covers the non-electrode areas, the following steps are further included: When the first electrode and / or the second electrode has good conductivity, ink is placed in the electrode areas on the first substrate and / or the second substrate to dip the corresponding first electrode and / or the second electrode.

Images