CN113314758A - Structure integrated battery unit, battery pack thereof and electronic equipment - Google Patents

Structure integrated battery unit, battery pack thereof and electronic equipment Download PDF

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Publication number
CN113314758A
CN113314758A CN202110542663.6A CN202110542663A CN113314758A CN 113314758 A CN113314758 A CN 113314758A CN 202110542663 A CN202110542663 A CN 202110542663A CN 113314758 A CN113314758 A CN 113314758A
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China
Prior art keywords
current collector
integrated battery
structurally integrated
positive electrode
negative electrode
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Pending
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CN202110542663.6A
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Chinese (zh)
Inventor
杜萍
伍芳
王欣全
张晓琨
彭晓丽
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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Priority to CN202110542663.6A priority Critical patent/CN113314758A/en
Publication of CN113314758A publication Critical patent/CN113314758A/en
Pending legal-status Critical Current

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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

Abstract

The invention relates to the technical field of batteries, in particular to a structure-integrated battery unit and a battery pack. In the invention, the arrangement of the current collector with the porous structure can effectively increase the contact area between the active material of the structurally integrated battery unit and the current collector, provide a rapid electronic transmission channel to obtain better energy storage performance, and in addition, can improve the toughness and flexibility when used as a structural support member to meet the mechanical performance requirements of different products on the structurally integrated battery unit. The structure-integrated battery pack contained in the electronic equipment can store electric energy, bear the weight of the battery pack and serve as a structural material, utilize energy storage and integrate the structure integrally, and a distributed energy support scheme with wide applicability can be provided.

Description

Structure integrated battery unit, battery pack thereof and electronic equipment
[ 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 battery pack and electronic equipment.
[ background of the invention ]
With the popularization of electronic digital products, electric vehicles or aircrafts, the problems of endurance, battery heating, service life and safety of the aircraft are paid more and more attention. The conventional energy storage module generally arranges batteries in a machine body in a centralized manner, so that the battery pack has large volume and weight and poor battery performance. Therefore, it is desirable to provide a novel battery structure, which has the problem of large volume and weight, and thus, the endurance of the lithium battery and the electronic device having the lithium battery is improved.
[ summary of the invention ]
In order to overcome the technical problems in the prior art, the invention provides a battery unit with an integrated structure, a battery pack and an electronic device.
In order to solve the technical problems, the invention provides the following technical scheme: a structure integrated battery unit comprises a positive electrode, an electrolyte body, a negative electrode and current collectors respectively electrically connected with the positive electrode and the negative electrode, wherein the current collector of at least one electrode is of a porous structure, and the current collector is a structure support of the structure integrated battery unit.
Preferably, the porosity of the porous structure is 10% to 90%.
Preferably, the porous structure comprises a pore rib and a pore formed by the pore rib.
Preferably, the maximum cross-sectional dimension of the aperture is less than 1 cm.
Preferably, the cross-sectional shape of the holes comprises any one or a combination of a hexagon, a diamond, a quadrangle, a triangle, a circle, an ellipse or any other shape.
Preferably, the current collector electrically connected with the positive electrode is a positive electrode current collector, and the current collector electrically connected with the negative electrode is a negative electrode current collector; the anode current collector, the anode, the electrolyte body, the cathode and the cathode current collector are sequentially arranged from outside to inside; or the negative current collector, the negative electrode, the electrolyte body, the positive electrode and the positive current collector are arranged in sequence from outside to inside.
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 positive electrode current collector, and the second conductive plate is electrically connected to a negative electrode 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.
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, and which serves as a case or a structural member of the electronic device.
Compared with the prior art, the battery unit with the integrated structure, the battery pack and the electronic equipment have the advantages that:
the structure-integrated battery unit provided by the invention comprises a positive electrode, an electrolyte body, a negative electrode and current collectors respectively electrically connected with the positive electrode and the negative electrode, wherein the current collector of at least one electrode is of a porous structure, and the current collector is a structure support of the structure-integrated battery unit. In the invention, the corresponding current collector can be used as a structural support of the structurally integrated battery unit, and the current collector can have a porous structure, so that the structurally integrated battery unit has the function of the structural support, and meanwhile, the arrangement of the current collector with the porous structure can effectively increase the contact area between the active material of the structurally integrated battery unit and the current collector, provide a rapid electron transmission channel and further obtain better energy storage performance. Furthermore, due to the arrangement of the porous structure current collector, the toughness and flexibility of the structure integrated battery unit can be improved when the structure integrated battery unit is used as a structure support piece, so that the mechanical property requirements of different products on the structure integrated battery unit are met.
In the invention, the porosity of the porous structure is 10-90%, and the porous structure with specific porosity can enable the corresponding structure-integrated battery unit to have different energy storage performance and mechanical property, so that the optimal structure-integrated battery unit can be obtained based on requirements.
In the invention, the porous structure comprises a pore rib and a pore formed by enclosing the pore rib. Based on the setting of hole muscle and hole, can further improve the controllability to the porous structure that the mass flow body contains to can further refine the area of contact between the active material of control structure integration battery unit and the mass flow body, simultaneously, it is further right the correlation of the biggest cross section size of hole is injectd, and based on the relation of demand adjustment hole muscle and hole, and then improves the energy storage performance and the mechanical properties of structure integration battery unit.
In the present invention, the cross-sectional shape of the hole includes any one or a combination of a hexagon, a diamond, a quadrangle, a triangle, a circle, an ellipse, or any other arbitrary shape. Aiming at the selection of different cross section shapes of the holes, various mechanical property requirements can be met.
In the invention, the current collector electrically connected with the anode is an anode current collector, and the current collector electrically connected with the cathode is a cathode current collector; the anode current collector, the anode, the electrolyte body, the cathode and the cathode current collector are sequentially arranged from outside to inside; or the negative current collector, the negative electrode, the electrolyte body, the positive electrode and the positive current collector are arranged in sequence from outside to inside. Arranging the corresponding structure integrated battery unit into a positive current collector 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.
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.
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.
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.
Further, in the electronic device provided by the invention, the battery pack with the structure integrated therein can store electric energy and carry the electric energy to serve as a structural material, and the structural material can be used as a shell or a 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. The distributed energy supporting scheme with wide applicability can be provided by utilizing the distributed layout energy storage and the structure integration.
[ 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 (Li)2O-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 battery pack and electronic equipment thereof, which have the following beneficial effects:
the structure-integrated battery unit provided by the invention comprises a positive electrode, an electrolyte body, a negative electrode and current collectors respectively electrically connected with the positive electrode and the negative electrode, wherein the current collector of at least one electrode is of a porous structure, and the current collector is a structure support of the structure-integrated battery unit. In the invention, the corresponding current collector can be used as a structural support of the structurally integrated battery unit, and the current collector can have a porous structure, so that the structurally integrated battery unit has the function of the structural support, and meanwhile, the arrangement of the current collector with the porous structure can effectively increase the contact area between the active material of the structurally integrated battery unit and the current collector, provide a rapid electron transmission channel and further obtain better energy storage performance. Furthermore, due to the arrangement of the porous structure current collector, the toughness and flexibility of the structure integrated battery unit can be improved when the structure integrated battery unit is used as a structure support piece, so that the mechanical property requirements of different products on the structure integrated battery unit are 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.
Further, in the electronic device provided by the invention, the battery pack with the structure integrated therein can store electric energy and carry the electric energy to serve as a structural material, and the structural material can be used as a shell or a 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. The distributed energy supporting scheme with wide applicability can be provided by utilizing the distributed layout energy storage and the structure integration.
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)

1. The structure-integrated battery unit is characterized by comprising a positive electrode, an electrolyte body, a negative electrode and current collectors respectively electrically connected with the positive electrode and the negative electrode, wherein the current collector of at least one electrode is of a porous structure, and the current collectors are structural support members of the structure-integrated battery unit.
2. The structurally integrated battery cell as defined in claim 1, wherein: the porosity of the porous structure is 10% -90%.
3. The structurally integrated battery cell as defined in claim 1, wherein: the porous structure comprises a pore rib and a pore formed by the pore rib in a surrounding mode.
4. The structurally integrated battery cell as defined in claim 3, wherein: the maximum cross-sectional dimension of the hole is less than 1 cm.
5. The structurally integrated battery cell as defined in claim 3, wherein: the cross section of the holes comprises any one or combination of a hexagon, a rhombus, a quadrangle, a triangle, a circle, an ellipse or other arbitrary shapes.
6. The structurally integrated battery cell as defined in claim 1, wherein: the current collector electrically connected with the anode is an anode current collector, and the current collector electrically connected with the cathode is a cathode current collector; the anode current collector, the anode, the electrolyte body, the cathode and the cathode current collector are sequentially arranged from outside to inside; or the negative current collector, the negative electrode, the electrolyte body, the positive electrode and the positive current collector are arranged in sequence from outside to inside.
7. The structurally integrated battery cell as defined in claim 6, wherein: the structure integration battery unit still includes first conductive plate and the second conductive plate of being connected with peripheral hardware electricity, wherein, first conductive plate is connected with the anodal mass flow body electricity, the second conductive plate with the negative pole mass flow body electricity is connected.
8. The structurally integrated battery cell as defined in claim 6, wherein: 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.
9. A structure integration group battery which characterized in that: the battery pack comprises a plurality of structurally integrated battery units as defined in any one of claims 1 to 8, wherein the structurally integrated battery units are regularly or irregularly distributed among the structurally integrated battery units.
10. An electronic device, characterized in that: which comprises the structurally integrated battery pack according to claim 9, which is disposed in a concentrated or dispersed manner, and which serves as a case or a structural member of an electronic device.
CN202110542663.6A 2021-05-18 2021-05-18 Structure integrated battery unit, battery pack thereof and electronic equipment Pending CN113314758A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070002523A1 (en) * 2003-03-31 2007-01-04 Nobuo Ando Organic electrolyte capacitor
CN105047943A (en) * 2015-07-04 2015-11-11 广东烛光新能源科技有限公司 Flexible device and preparation method thereof
CN106159314A (en) * 2015-04-15 2016-11-23 微宏动力系统（湖州）有限公司 All-solid lithium-ion battery and preparation method thereof
CN112751073A (en) * 2020-12-02 2021-05-04 电子科技大学 Structurally integrated battery, preparation method thereof and equipment with battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070002523A1 (en) * 2003-03-31 2007-01-04 Nobuo Ando Organic electrolyte capacitor
CN106159314A (en) * 2015-04-15 2016-11-23 微宏动力系统（湖州）有限公司 All-solid lithium-ion battery and preparation method thereof
CN105047943A (en) * 2015-07-04 2015-11-11 广东烛光新能源科技有限公司 Flexible device and preparation method thereof
CN112751073A (en) * 2020-12-02 2021-05-04 电子科技大学 Structurally integrated battery, preparation method thereof and equipment with battery

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