CN113314757A - Structure-integrated battery unit, preparation method thereof, structure-integrated battery pack and electronic equipment - Google Patents
Structure-integrated battery unit, preparation method thereof, structure-integrated battery pack and electronic equipment Download PDFInfo
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- CN113314757A CN113314757A CN202110541550.4A CN202110541550A CN113314757A CN 113314757 A CN113314757 A CN 113314757A CN 202110541550 A CN202110541550 A CN 202110541550A CN 113314757 A CN113314757 A CN 113314757A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/76—Containers for holding the active material, e.g. tubes, capsules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of batteries, in particular to a structurally integrated battery unit which comprises a first electrode body, an electrolyte body and a second electrode body which are sequentially arranged from outside to inside, wherein any one or two of a first current collector in the first electrode body and a second current collector in the second electrode body is a structural support of the structurally integrated battery unit. Because each structure integrated battery unit has the functions of energy storage and structure support, the material can be saved, a cavity for installing the battery is not required to be additionally arranged, and the volume of the equipment can be reduced; because can be the disconnect-type setting with every structure integration unit, then can be based on the demand "unite two into one" and then make the two high-efficient fusions of energy storage device and structure, alleviate equipment weight. In addition, the invention also provides a structure-integrated battery pack and an electronic device with the battery pack, which also have the technical effects. The preparation method based on the invention can improve the preparation yield so as to realize large-scale production.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of energy storage, in particular to a structure-integrated battery unit, a preparation method of the structure-integrated battery unit, a structure-integrated battery pack and electronic equipment.
[ background of the invention ]
For traditional electronic digital products, electric vehicles or unmanned aerial vehicles, the general way is to concentrate the battery to settle in the fuselage, and group battery volume weight is great. In current battery installation, because the group battery installation is comparatively concentrated, often still need additionally provide installation accommodating space for the group battery, consequently, the whole volume of equipment that leads to electrified pond and weight are all great, consequently, need provide a neotype battery structure urgently to solve the bulky problem that just needs additionally to set up the space of holding battery of group battery, realize the promotion of lithium cell and have lithium cell electronic equipment duration. Therefore, how to save the weight and volume of the system to the maximum extent becomes a hot point of research.
[ summary of the invention ]
In order to solve the technical problems of large size and heavy weight of a battery pack and equipment provided with batteries in the prior art, the invention provides a structure-integrated battery unit, a structure-integrated battery and equipment with the battery.
In order to solve the technical problems, the invention provides the following technical scheme: the structure-integrated battery unit comprises a first electrode body, an electrolyte body and a second electrode body which are sequentially arranged from outside to inside, wherein the first electrode body comprises a first current collector and a first electrode which are electrically connected, the second electrode body comprises a second current collector and a second electrode which are electrically connected, and any one or two of the first current collector and the second current collector is a structural support of the structure-integrated battery unit.
Preferably, the first current collector comprises a positive current collector, the first electrode comprises a positive electrode, the second electrode comprises a negative electrode and the second current collector comprises a negative current collector; or the first current collector comprises an anode current collector, the first electrode comprises an anode, the second electrode comprises a cathode and the second current collector comprises a cathode current collector.
Preferably, the positive current collector comprises any one or a mixture of several of a metal material, a carbon material and a conductive semiconductor; and/or the negative current collector comprises any one or combination of stainless steel, copper, nickel, gold, chromium, platinum and titanium.
Preferably, the first current collector and the second current collector have the same shape, and the distance L between the first current collector and the second current collector is the same.
Preferably, the structurally integrated battery cell further includes a first conductive plate and a second conductive plate electrically connected to a peripheral device, wherein the first conductive plate is electrically connected to a first current collector, and the second conductive plate is electrically connected to a second current collector.
Preferably, the shape of the structural support formed by the first current collector enclosure comprises any one of a polygon, a circle and an ellipse.
Preferably, the first current collector and/or the second current collector are porous structures, and the porosity of the first current collector and/or the second current collector is 10% -90%.
In order to solve the technical problems, the invention also provides the following technical scheme: a structure-integrated battery pack comprises a plurality of structure-integrated battery units, wherein the plurality of structure-integrated battery units are regularly or irregularly distributed.
In order to solve the technical problems, the invention also provides the following technical scheme: an electronic device includes the above-described structure-integrated battery pack, which is disposed in a concentrated or dispersed manner, as a case or a built-in structural member of the electronic device.
In order to solve the technical problems, the invention also provides the following technical scheme: a method for preparing a structurally integrated battery unit is characterized by comprising the following steps: which comprises the following steps: preparing at least one current collector with a three-dimensional configuration; forming an electrode corresponding to the current collector on one main surface of the current collector or in the current collector to form an electrode element; and combining the electrode element and the electrolyte body to obtain a structurally integrated battery unit; wherein the current collector serves as a structural support for the structurally integrated battery cell.
Compared with the prior art, the structurally integrated battery unit, the structurally integrated battery and the equipment with the battery provided by the invention have the following advantages:
the structure-integrated battery unit comprises a first electrode body, an electrolyte body and a second electrode body which are sequentially arranged from outside to inside, wherein the first electrode body comprises a first current collector and a first electrode, the second electrode body comprises a second current collector and a second electrode, and any one or two of the first current collector and the second current collector is a structural support member of the structure-integrated battery unit; further, because can be the disconnect-type setting with every structure integration unit, consequently, can "unite two into one" and then make both high-efficient the fusing with energy storage device and structure based on the demand, be favorable to alleviateing equipment weight.
In the invention, the positive current collector may be arranged to coat the positive electrode, the electrolyte body, the negative electrode and the negative current collector; or the negative current collector coats the negative electrode, the electrolyte body, the positive electrode and the positive current collector. Different arrangement modes can improve the applicability of the structure-integrated battery unit, and the structure of the corresponding structure-integrated battery unit can be adjusted based on actual needs, so that the optimal energy storage and structural performance are achieved.
For the limitation of the materials of the positive current collector and the negative current collector, the mechanical property of the battery unit with the integrated structure can be improved based on the selection of specific materials while the battery unit with the integrated structure has a better energy storage effect.
In the invention, when the shapes of the first current collector and the second current collector in the structurally integrated battery cell are the same, the distance L between the first current collector and the second current collector is the same, so that the battery energy storage performance of the structurally integrated battery cell prepared based on the method is more stable, and the accommodating space defined between the first current collector and the second current collector is the same due to the equal distance defined between the first current collector and the second current collector, so that the structurally integrated battery cell has better mechanical performance.
In the present invention, in order to enable the structurally integrated battery cell to be better electrically connected with a peripheral device, the structurally integrated battery cell further includes a first electrically conductive plate and a second electrically conductive plate electrically connected with the peripheral device, wherein the first electrically conductive plate is electrically connected with a first current collector, and the second electrically conductive plate is electrically connected with a second current collector.
In the invention, the shape of the structural support part formed by enclosing the first current collector comprises any one of a polygon, a circle and an ellipse, and based on the selection of different shapes, the structurally integrated battery unit with different energy storage performance and mechanical performance can be obtained, thereby meeting different application scenes. And when the shapes of the first current collector and the second current collector are different, the energy storage performance and the mechanical property of the structurally integrated battery unit are also different.
Further, in the invention, the first current collector and/or the second current collector are/is in a porous structure with porosity, and the first current collector and the second current collector are set to be in a porous structure, so that the battery energy storage performance of the battery unit with the integrated structure can be improved. In addition, the structural support piece of the structurally integrated battery unit can be made to be a porous structure, so that the toughness and flexibility of the structural support piece can be improved, and the mechanical property requirements of different products on the structurally integrated battery unit can be met.
The invention also provides a structure-integrated battery pack, which comprises a plurality of structure-integrated battery units, wherein the plurality of structure-integrated battery units are regularly or irregularly distributed. The battery pack can be conveniently embedded into an equipment structure of the battery pack to be installed in a distributed mode by adopting the obtained structure-integrated battery unit, so that an energy device and a structural member can be efficiently integrated, the weight of the equipment is favorably reduced, the size of the equipment is reduced, the effective load of the equipment is increased, and the service life of the equipment is prolonged.
Furthermore, in the electronic device provided by the invention, the battery pack with the structure integrated therein can store electric energy and bear the load to serve as a structural material, and the structural material is used as a shell or a built-in structural component of the electronic device. Based on the configuration, the overall mass of the electronic equipment can be effectively reduced, the volume of the electronic equipment is reduced, the design is simplified, and the efficiency of the system is improved. And the programmable and self-adaptive distributed energy support is realized by utilizing the integrated integration of distributed layout energy, structure and information and the coupling operation of energy and information.
The invention also provides a preparation method of the structurally integrated battery unit, which comprises the following specific steps of firstly preparing at least one current collector with a three-dimensional configuration; forming an electrode corresponding to one main surface of the current collector to form an electrode element; and combining the electrode element and the electrolyte body to obtain a structurally integrated battery unit; wherein the current collector serves as a structural support for the structurally integrated battery cell. Based on the steps, the preparation process of the structurally integrated battery unit can be simplified, and the stability of the energy storage performance of the prepared structurally integrated battery unit can be improved. Because the positive current collector and the negative current collector which are used as the structural support members are independently prepared, the controllability of a mechanical framework of the prepared structure-integrated battery unit can be improved, and the preparation yield of the structure-integrated battery unit is further improved, so that large-scale production is realized.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a structurally integrated battery cell provided in a first embodiment of the present invention.
Fig. 2 is a schematic sectional view taken along a-a in fig. 1.
Fig. 3 is a schematic structural view of the structurally integrated battery cell shown in fig. 1 having a first conductive plate and a second conductive plate.
Fig. 4 is a structural view illustrating a separated state of the structurally integrated battery cell shown in fig. 3.
Fig. 5 is one of the schematic diagrams of the current collector in a porous structure.
Fig. 6 is a second schematic diagram of the current collector having a porous structure.
Fig. 7 is a schematic view of the hole rib shown in fig. 6 enclosing to form a hole.
Fig. 8 is a schematic structural view of a structurally integrated battery pack provided in a second embodiment of the present invention.
Fig. 9 is a schematic diagram of the arrangement of the structurally integrated battery cells in the structurally integrated battery pack in an array.
Fig. 10 is a schematic structural diagram of a plurality of structurally integrated battery cells sharing a first electrical connection plate and a second electrical connection plate to achieve electrical connection.
Fig. 11 is a schematic structural diagram of an electronic device according to a third embodiment of the present invention.
Fig. 12 is a schematic structural diagram of a flying device according to a fourth embodiment of the present invention.
Fig. 13 is an enlarged schematic view at B in fig. 12.
Fig. 14 is a schematic flow chart illustrating a method for manufacturing a structurally integrated battery cell according to a fifth embodiment of the present invention.
Fig. 15 is a schematic flow chart illustrating steps of a modification of the method for manufacturing a structurally integrated battery cell according to the present invention.
The attached drawings indicate the following:
10. a structurally integrated battery cell; 1. a first electrode body; 2. a second electrode body; 11. a first current collector; 12. a first electrode; 13. an electrolyte body; 14. a second electrode; 15. a second current collector; 101. a positive current collector; 102. a positive electrode; 103. a negative current collector; 104. a negative electrode; 105. an electrolyte body; 108. an accommodating space; 106. a first conductive plate; 107. a second conductive plate; 109. a porous structure; 110. a structural support;
30. a structurally integrated battery pack; 301. a first electrical connection plate; 302. a second electrical connection plate; 309. a sensing control unit;
40. an electronic device; 50. a flying device; 51. an airfoil.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Reference in the specification to "one embodiment," "a preferred embodiment," "an embodiment," or "embodiments" means that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the invention and may be in more than one embodiment. The appearances of the phrases "in one embodiment," "in an embodiment," or "in various embodiments" in various places in the specification are not necessarily all referring to the same embodiment or embodiments.
Specific terminology is used throughout the description for illustration and is not to be construed as limiting. A service, function, or resource is not limited to a single service, function, or resource; the use of these terms may refer to grouped related services, functions or resources, which may be distributed or aggregated.
Referring to fig. 1, a first embodiment of the present invention provides a structurally integrated battery unit 10, which includes a first electrode body 1, an electrolyte body 13, and a second electrode body 2, which are sequentially disposed from outside to inside, wherein the first electrode body 1 encloses and forms an accommodating space 108, and the electrolyte body 13 and the second electrode body 2 are disposed in the accommodating space 108.
Specifically, the first electrode body 1 includes a first current collector 11 and a first electrode 12 that are electrically connected, and the second electrode body 2 includes a second electrode 14 and a second current collector 15 that are electrically connected. The surfaces of the first current collector 11 and the second current collector 15 which are oppositely arranged can form the first electrode 12 and the second electrode 14 respectively; in other embodiments, the first electrode 12 may also be embedded in whole or in part within the first current collector 11 and/or the second electrode 14 may be embedded in whole or in part within the second current collector 15.
In the present embodiment, either one or both of the first current collector 11 and the second current collector 15 are structural supports of the structurally integrated battery cell 10.
In order to meet the requirement that the first current collector 11 and/or the second current collector 15 is used as a structural support of the structurally integrated battery cell 10, the mechanical properties of the first current collector 11 and/or the second current collector 15 need to meet certain requirements, and the requirements on the mechanical properties of the first current collector 11 and the second current collector 15 may be adjusted correspondingly based on the selection of specific materials of the structurally integrated battery cell 10 and specific application scenarios thereof.
The shape of the structural support 110 formed by enclosing the first current collector 11 includes any one of a polygon, a circle and an ellipse; the shape of the structural support 110 formed by the first current collector 11 and the second current collector 15 may be the same or different.
For better illustration of the structurally integrated battery cell 10, in conjunction with the illustration of fig. 2, the following definitions can be further made: the first current collector 11 comprises a positive current collector 101, the first electrode 12 comprises a positive electrode 102, the second electrode 14 comprises a negative electrode 104 and the second current collector 15 comprises a negative current collector 103.
Or in other embodiments, the first current collector 11 includes a negative current collector 103, the first electrode 12 includes a negative electrode 104, the second electrode 14 includes a positive electrode 102 and the second current collector 15 includes a positive current collector 101.
As shown in fig. 2, the positive electrode current collector 101, the positive electrode 102, the electrolyte body 105, the negative electrode 104, and the negative electrode current collector 103 are sequentially sleeved. Either or both of the positive electrode current collector 101 and the negative electrode current collector 103 may be a structural support 110 of the structurally integrated battery cell 10.
In some embodiments, when the positive electrode current collector 101 is used as a structural support 110 of a structurally integrated battery, a receiving space 108 may be formed in the structural support 110, and the positive electrode 102, the negative electrode 104, the electrolyte body 105, and the negative electrode current collector 103 are disposed in the receiving space 108, as shown in fig. 1 and 2.
With reference to fig. 2, the distance between the positive electrode current collector 101 and the negative electrode current collector 102 is set as a distance L, and in order to improve the battery performance of the structurally integrated battery cell 10, the shapes enclosed by the positive electrode current collector 101 and the negative electrode current collector 102 are the same, so that the distances L between the positive electrode current collector 101 and the negative electrode current collector 103 are equal in the structurally integrated battery cell 10.
Specifically, the thicknesses of the positive electrode current collector 101, the positive electrode 102, the negative electrode current collector 103, the negative electrode 104, and the electrolyte body 105 may be adjusted based on actual needs.
As shown in fig. 2, in another embodiment of the present embodiment, the positive electrode current collector 101 is disposed on the outermost layer, and the negative electrode current collector 103 is disposed in a space surrounded by the positive electrode current collector 101.
Further, in order to satisfy the requirements for the structural strength and the energy storage function of the structurally integrated battery cell 10, the materials of the positive electrode current collector 101, the positive electrode 102, the negative electrode current collector 103, the negative electrode 104, and the electrolyte body 105 need to be further limited.
Specifically, the positive electrode collector 101 includes a metal material, a carbon fiber, a conductive semiconductor, and the like.
The positive electrode 102 includes any one or a combination of several of lithium cobaltate, lithium iron phosphate, nickel cobalt manganese ternary material, nickel cobalt aluminum, lithium vanadium phosphate, lithium manganate, lithium nickelate, and the like.
The negative current collector 103 may include, but is not limited to, any one or a combination of stainless steel, copper, nickel, gold, chromium, platinum, titanium, and the like.
The negative electrode 104 may include metallic lithium, graphite, lithium titanate, silicon negative electrode alloys, and the like.
Further, the material of the electrolyte body 105 may include, for example, Li3N, sulfide, amorphous borate salt (Li2O-B2O3–SiO2) Silicate (Li)2O-V2O5-SiO2)、LiPON、Li3xLa2/3-xTiO3(LLTO)，LiNbO3、LiTaO、Li1+ xMxTi2-x(PO4)3(LATP)、Li3OCl、Li7La3Zr2O12(LLZO), and the like.
In some embodiments of the present embodiment, the positive electrode 102 may be formed on a surface of the positive electrode current collector 101 facing the negative electrode current collector 103 by 3D printing, surface deposition, plating, spraying, injection molding, or the like, or a part of the positive electrode 102 may be embedded into the positive electrode current collector 101 during the molding process.
Similarly, the negative electrode 104 may also be formed on a surface of the negative electrode current collector 103 facing the positive electrode current collector 101 by 3D printing, surface deposition, plating, spraying, injection molding, or the like, or a part of the negative electrode 104 is embedded in the negative electrode current collector 103.
Since a receiving space is formed between the positive electrode 102 and the negative electrode 104, in some embodiments of the present invention, the electrolyte body 105 may be formed between the positive electrode 102 and the negative electrode 104 by pouring a solid electrolyte slurry into the receiving space 108. It is understood that in other embodiments, the electrolyte body 105 may also be formed between the positive electrode 102 and the negative electrode 104 based on methods such as 3D printing, surface deposition, plating, spray forming, and the like.
In some variations of this embodiment, the electrolyte body 105 may be formed between the positive electrode current collector 101 and the negative electrode current collector 103, and then a positive electrode layer 102 and a negative electrode layer 104 may be formed on two opposite main surfaces of the electrolyte body 105 corresponding to the positive electrode current collector 101 and the negative electrode current collector 103 by means of 3D printing, surface deposition, plating, spraying, injection molding, and the like.
In the present embodiment, as shown in fig. 3, in order to lead the electric energy source of the structurally integrated battery cell 10 to the peripheral devices for the charge and discharge function, the structurally integrated battery cell 10 may further include a first conductive plate 106 and a second conductive plate 107. As shown in fig. 4, the first conductive plate 106 may be electrically connected to the positive current collector 101, and the second conductive plate 107 is electrically connected to the negative current collector 103. In order to make the structurally integrated battery cell 10 more diversified, the first conductive plate 106 and the positive electrode current collector 101, and the second conductive plate 107 and the negative electrode current collector 103 may be integrally molded or joined to achieve electrical connection.
In another embodiment, the first conductive plate 106 may be electrically connected to the negative electrode current collector 103, and the second conductive plate 107 may be electrically connected to the positive electrode current collector 101.
Referring to fig. 5-6, in some embodiments of the invention, the positive current collector 101 and/or the negative current collector 103 may also include a porous structure 109. In these embodiments, when the positive electrode current collector 1011 and/or the negative electrode current collector 103 are the porous structure 109, the accommodating space 108 enclosed by the positive electrode current collector 1011 and/or the negative electrode current collector 103 may also be understood as including a space formed in the porous structure in addition to the space enclosed by the positive electrode current collector 101 and/or the negative electrode current collector 103, and in this case, the corresponding positive electrode 102 may be partially or completely embedded in the positive electrode current collector 101 having the porous structure.
Specifically, as shown in fig. 5-6, the porous structure 109 of the positive electrode current collector 101 and/or the negative electrode current collector 103 may include a pore rib 1091 and a pore 1092 surrounded by the pore rib 1091. The porosity of the porous structure 109 satisfies 10-90%, wherein, specifically, the porosity may further be 10-30%, 20-40%, 30-60%, 60-70%, 75-85%, or 80-90%.
It is understood that the cross-sectional shape of the holes 1092 includes, but is not limited to, any one or combination of hexagonal, diamond, quadrilateral, triangular, circular, oval or any other shape. Wherein, as shown in fig. 5, the cross-sectional shape of the hole 1092 is hexagonal; as shown in fig. 6, the cross-sectional shape of the holes 1092 is diamond-shaped.
It is understood that the maximum cross-sectional dimension of the holes 1092 is less than 1cm, and in particular, the maximum cross-sectional dimension of the holes 1092 may be less than 500 μm.
In order that the porous structure 109 may have sufficient mechanical strength, as shown in fig. 7, the range of the maximum cross-sectional dimension r of the ribs 1091 needs to be greater than 10 μm, and further, the maximum cross-sectional dimension r of the ribs 1091 may be greater than 100 μm or the like. The selection of the maximum cross-sectional dimension r of the ribs 1091 is associated with the structural characteristics of the structurally integrated battery cell 10 comprising the positive current collector 101 and/or the negative current collector 103 as structural supports, and is herein by way of example only and not by way of limitation.
It is understood that, in order to meet the usage requirement of a plurality of lithium batteries, in the embodiment, the distribution of the corresponding holes 1092 may be regular distribution or irregular distribution. Herein, the regular distribution of holes 1092 may be understood as the holes 1092 having the same cross-sectional shape are distributed in an array, or the holes 1092 having at least one or more cross-sectional shapes are distributed periodically. The irregular distribution can be understood as that the holes 1092 have an irregular cross-sectional shape or the holes 1092 have a disordered distribution. In this embodiment, the distribution of the holes 1092 may be adjusted based on actual requirements.
Based on the above-mentioned definition related to the ribs 1091 and the holes 1092, the conductive porous structure with mechanical properties can be provided for the positive electrode current collector 101 and/or the negative electrode current collector 103, and the conductive porous structure can provide a supporting framework for the structural integrated unit 10.
It is understood that when both the positive electrode current collector 101 and the negative electrode current collector 103 have a porous structure, the structurally integrated unit 10 may obtain superior mechanical properties.
It is understood that, when the positive electrode current collector 101 is a porous structure, the material thereof includes, but is not limited to, a metal material, a carbon fiber, a conductive semiconductor, and the like. When the negative current collector 103 is a porous structure, the material thereof may include, but is not limited to, any one or a combination of stainless steel, copper, nickel, gold, chromium, platinum, titanium, and the like.
Referring to fig. 8, a structurally integrated battery pack 30 according to a second embodiment of the present invention includes a plurality of structurally integrated battery cells 10 as described in the first embodiment. Specifically, taking the structurally integrated battery cell 10 described in the first embodiment as an example, as shown in fig. 9, the positive electrode current collector 101 and the negative electrode current collector 103 of a plurality of structurally integrated battery cells 10 share the first electrical connection plate 301 and the second electrical connection plate 302. It is understood that in the structure-integrated battery pack 30, the plurality of structure-integrated battery cells 10 may be regularly distributed or irregularly distributed.
Wherein a regular distribution of the plurality of structurally integrated battery cells 10 may be as shown in fig. 9, and a plurality of the structurally integrated battery cells 10 may be distributed in a column. Further, as shown in fig. 10, the structurally integrated battery cells 10 may be distributed in an array.
The irregular distribution of the plurality of structurally integrated battery cells 10 may be a dispersed distribution.
In the present embodiment, the different distribution manners of the structurally integrated battery cells 10 can be adjusted based on the specific application scenario of the structurally integrated battery pack 30.
As shown in fig. 8 and 9, the distance R between the adjacent structurally integrated battery cells 10 may be different depending on the usage scenario of the structurally integrated battery cells 10 and the material selected. The distance R is set to provide a certain distance between the structurally integrated battery packs 30, so that the structurally integrated battery packs 30 can be used as different structural members of different electronic devices.
In the present embodiment, in order to form a battery as a whole between the plurality of the structurally integrated battery cells 10, the positive electrode current collector 101 and the negative electrode current collector 103 of each structurally integrated battery cell 10 are electrically connected to each other.
As shown in fig. 10, a plurality of the structure-integrated battery cells 10 share the first and second electrical connection plates 301 and 302 to achieve electrical connection. In other embodiments, a plurality of the structurally integrated battery cells 10 may be electrically connected directly by a wire. Wherein, the electrical connection relationship among the plurality of structurally integrated battery cells 10 is a series connection.
Further, as shown in fig. 10, the structure-integrated battery pack 30 further includes a sensing control unit 309, and the sensing control unit 309 can be electrically connected to the structure-integrated battery unit 10 and monitor the operation state of the structure-integrated battery unit 10, so that real-time detection of temperature, pressure, current, potential, internal resistance, and the like inside the structure-integrated battery unit can be realized, and controllability, stability, and safety of the structure-integrated battery pack 30 can be improved.
It is understood that, in actual use, the structurally integrated battery pack 30 may also be composed of structurally integrated battery cells 10 of various sizes and/or shapes to meet different structural strength requirements, and the structurally integrated battery pack 30 may be composed of structurally integrated battery cells 10 of two different sizes.
The specific limitations regarding the structurally integrated battery cell 10 are the same as those described in the first embodiment, and will not be described herein again.
To better explain the application of the structure-integrated battery pack 30, as shown in fig. 11, in the third embodiment of the present invention, an electronic device 40 is further provided, and the electronic device 40 includes, but is not limited to, a product with a battery pack that needs to satisfy both lightweight battery devices and structural strength requirements, such as an automobile, an aircraft, and the like.
The structurally integrated battery pack 30 may be used as a housing or a built-in structure of the electronic device 40. The battery pack 30 with the integrated structure can be used as a shell or a main structural member of an automobile or a flight device due to the special structure of the battery pack, and can be used as a lithium battery with an energy storage function and a structural function of two-in-one, so that the requirement of future diversified product design can be met.
The structure integrated battery pack 30 is arranged in the electronic equipment 40, so that the design of an energy storage device can be greatly simplified, the maintenance and the replacement are convenient, the structure integrated battery pack 30 can have the functions of energy storage and structure, and no additional mechanical device is needed, so that the size of the electronic equipment 40 is further reduced, the volume utilization efficiency of the electronic equipment 40 can be greatly improved, the space of the electronic equipment 40 is fully utilized, and the weight of the electronic equipment 40 can be reduced.
Specifically, as shown in fig. 12, the fourth embodiment of the present invention further provides a flying device 50, and the corresponding flying device 50 may be an aircraft such as a carrier aircraft, an unmanned aerial vehicle, etc. With the application of the flying device 50 in many fields such as aerial photography, agricultural plant protection, remote delivery, sport shooting, etc., the application is more and more extensive. The flight time and the load capacity of the aircraft become important indexes for evaluating the performance of the aircraft, and the performance is mainly influenced by the battery performance and the weight of the whole aircraft.
Specifically, the flight device 50 includes the structurally integrated battery pack 30 as provided in the second embodiment, and the structurally integrated battery pack 30 may be used as a wing, a fuselage, and other structural members of the flight device 50, and may also be used as a chassis of the flight device 50, so as to fully utilize the limited space of the flight device 50, and a lithium battery with integrated structural functions is disposed in the space, so that the flight device 50 can meet the requirement of flight intensity, and at the same time, the weight of the flight device 50 can be further reduced, so as to improve the effective flight time of the flight device 50.
In the present embodiment, in order to meet the requirements of different flight devices 50, structurally integrated battery packs 30 with different mechanical strengths, specifications, sizes and overall shapes may be disposed at different positions of the flight devices 50. As shown in fig. 12 and 13, a plurality of the structurally integrated battery packs 30 are composed of a plurality of structurally integrated battery cells 10 having a hexagonal structure at the wing 51 of the flying device 50, and a plurality of the structurally integrated battery packs 30 may be composed of structurally integrated battery cells 10 having other shapes at the bottom of the body of the flying device 50.
The structurally integrated battery pack 30 applicable to the flight device 50 provided by the invention integrates two independent systems, namely an energy storage device (which can provide energy for the flight device 50) and a structural component (which can provide structural support and protection for the flight device 50), which account for 30% and 20% of the total weight of the flight device 50, and distributes the energy storage device and the structural component at various positions of the aircraft as required to serve as the structural component, so that the space and the mass of equipment can be greatly saved, and even the energy storage without volume and mass is realized, and considerable benefits can be obtained in the aspect of improving the system performance.
Further, since the corresponding structure-integrated battery pack 30 may be formed by integrating the battery units 10 by a plurality of independent structures, energy storage devices that may be originally concentrated can be dispersed as needed, so that a problem of large concentrated heat release caused by concentrated arrangement of the energy storage devices is reduced, and stability of the flying apparatus 50 can be improved.
Referring to fig. 14, a fifth embodiment of the present invention provides a method for preparing a structurally integrated battery cell S60, which includes the following steps:
step P1, preparing at least one current collector with a three-dimensional configuration;
step P2, forming an electrode corresponding to the current collector on one main surface of the current collector or in the current collector to form an electrode element; and
step P3, combining the electrode-based member with the electrolyte body to obtain a structurally integrated battery cell.
In step P1, the current collector having a three-dimensional structure may serve as a structural support of the structurally integrated battery cell, and the corresponding current collectors may be a positive electrode current collector and a negative electrode current collector.
Further, in step P2, an electrode corresponding to the current collector may be formed on one main surface of the current collector to form an electrode member; an electrode corresponding to the current collector may also be formed within the current collector. The corresponding electrode may also be a positive electrode or a negative electrode, for example, a positive electrode may be formed on the main surface of the positive electrode current collector, a negative electrode may be formed on the main surface of the negative electrode current collector, and a positive electrode piece and a negative electrode piece may be obtained correspondingly.
In the above step P3, the positive electrode member, the negative electrode member and the electrolyte body may be combined to obtain the structurally integrated battery cell.
Specifically, when the current collector with the three-dimensional configuration encloses and forms an accommodating space, the positive electrode piece and the negative electrode piece can be combined in an embedded mode, and after combination, the positive electrode of the positive electrode piece and the negative electrode of the negative electrode piece are arranged in opposite directions. At this time, the electrolyte body may be disposed between the positive electrode and the negative electrode.
In some specific embodiments of this embodiment, as shown in fig. 15, the steps P1-P3 may further include the following steps:
step S1, preparing a positive electrode current collector and a negative electrode current collector, wherein the positive electrode current collector and/or the negative electrode current collector are used as structural supports of the structurally integrated battery unit;
step S2, forming a positive electrode on one main surface of the positive electrode current collector to obtain a positive electrode piece, and forming a negative electrode on one main surface of the negative electrode current collector to obtain a negative electrode piece;
step S3, combining the positive electrode member and the negative electrode member so that the positive electrode and the negative electrode are oppositely arranged;
step S4, forming an electrolyte body between the positive electrode and the negative electrode; and
in step S5, packaging is performed to obtain a structurally integrated battery cell.
It is understood that, in the step S1, the positive electrode current collector and/or the negative electrode current collector corresponding to the three-dimensional structure can simultaneously have the characteristics of the mechanical structure, and thus can be used as a structural member. In the structurally integrated battery cell, either one or both of the positive electrode current collector and the negative electrode current collector may be provided as a three-dimensional structure. Specifically, the negative electrode current collector may have a layered structure or a three-dimensional structure, such as when the positive electrode current collector has a three-dimensional structure.
Specifically, when the positive electrode current collector and the negative electrode current collector both have a three-dimensional structure, the three-dimensional structures of the positive electrode current collector and the negative electrode current collector may be the same or different. The cross-sectional shapes of the positive electrode current collector and the negative electrode current collector may include, but are not limited to, any one of a hexagon, a diamond, a quadrangle, a triangle, a circle, an ellipse, or any other arbitrary shape.
In step S2, a positive electrode is formed on one main surface of the positive electrode current collector to obtain a positive electrode member, wherein the positive electrode member includes a positive electrode current collector and a positive electrode formed on the positive electrode current collector. And forming a negative electrode on one main surface of the negative electrode current collector to obtain a negative electrode piece, wherein the negative electrode piece comprises the negative electrode current collector and the negative electrode formed on the negative electrode current collector. Specifically, the positive electrode or the negative electrode can be correspondingly formed on the positive current collector and the negative current collector by adopting the modes of 3D printing, surface deposition, plating, spraying, injection molding and the like.
Further, in the above step S2, the corresponding positive electrode and/or negative electrode may also be partially or completely embedded into the positive electrode current collector and the negative electrode current collector based on 3D printing, surface deposition, plating, spraying, injection molding, and the like.
It is understood that the above steps S1 and S2 can be interchanged based on actual preparation requirements.
The positive electrode member and the negative electrode member are combined so that the positive electrode and the negative electrode are disposed to face each other in the above step S3, and thus a sheathing structure may be formed between the positive electrode member and the negative electrode member, and further, the solid electrolyte slurry may be formed between the positive electrode and the negative electrode by means of 3D printing, surface deposition, plating, spraying, injection molding, or the like in step S4.
Specifically, since the positive electrode current collector and/or the negative electrode current collector mentioned in the above steps are porous structures. Taking the negative electrode current collector as an example of a porous structure, the negative electrode may be filled in the porous structure of the negative electrode current collector, and the electrolyte body may be formed by growing on the surface of the negative electrode.
Further, between step S4 and step S5, the method may further include:
step S4A, forming a first conductive plate and a second conductive plate electrically connected to the positive current collector and the negative current collector, respectively;
it is understood that a plurality of the structurally integrated units may be further grouped into a structurally integrated battery pack.
In the above steps, the content of the specific material limitations of the negative current collector, the negative electrode, the positive current collector, the positive electrode, and the electrolyte body can refer to the content described in the first embodiment, and will not be described herein again.
It is to be understood that in the present invention patent, the descriptions for the same technical features in the first to fifth embodiments described above may be mutually cited. The examples and embodiments are given by way of illustration only and are not intended to limit the present invention.
Compared with the prior art, the invention provides a structure-integrated battery unit, a structure-integrated battery and a flight device, which have the following beneficial effects:
the structure-integrated battery unit comprises a first electrode body, an electrolyte body and a second electrode body which are sequentially arranged from outside to inside, wherein the first electrode body comprises a first current collector and a first electrode, the second electrode body comprises a second current collector and a second electrode, and any one or two of the first current collector and the second current collector is a structural support member of the structure-integrated battery unit; further, because can be the disconnect-type setting with every structure integration unit, consequently, can "unite two into one" and then make both high-efficient the fusing with energy storage device and structure based on the demand, be favorable to alleviateing equipment weight.
The invention also provides a structure-integrated battery pack, which comprises a plurality of structure-integrated battery units, wherein the plurality of structure-integrated battery units are regularly or irregularly distributed. The battery pack can be conveniently embedded into an equipment structure of the battery pack to be installed in a distributed mode by adopting the obtained structure-integrated battery unit, so that an energy device and a structural member can be efficiently integrated, the weight of the equipment is favorably reduced, the size of the equipment is reduced, the effective load of the equipment is increased, and the service life of the equipment is prolonged.
Furthermore, in the electronic device provided by the invention, the battery pack with the structure integrated therein can store electric energy and bear the load to serve as a structural material, and the structural material is used as a shell or a built-in structural component of the electronic device. Based on the configuration, the overall mass of the electronic equipment can be effectively reduced, the volume of the electronic equipment is reduced, the design is simplified, and the efficiency of the system is improved. And the programmable and self-adaptive distributed energy support is realized by utilizing the integrated integration of distributed layout energy, structure and information and the coupling operation of energy and information.
The invention also provides a preparation method of the battery unit with the integrated structure, which comprises the specific steps of firstly preparing and obtaining the anode current collector and the cathode current collector, then respectively forming the anode and the cathode on the anode current collector and the cathode current collector, and then forming the solid electrolyte body. Based on the steps, the preparation process of the structurally integrated battery unit can be simplified, and the stability of the energy storage performance of the prepared structurally integrated battery unit can be improved. Because the positive current collector and the negative current collector which are used as the structural support members are independently prepared, the controllability of a mechanical framework of the prepared structure-integrated battery unit can be improved, and the preparation yield of the structure-integrated battery unit is further improved, so that large-scale production is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
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Application publication date: 20210827 |