CN116742222B - Energy storage device, outer envelope and electronic equipment - Google Patents
Energy storage device, outer envelope and electronic equipment Download PDFInfo
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- CN116742222B CN116742222B CN202311032224.6A CN202311032224A CN116742222B CN 116742222 B CN116742222 B CN 116742222B CN 202311032224 A CN202311032224 A CN 202311032224A CN 116742222 B CN116742222 B CN 116742222B
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- side plate
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- 238000004146 energy storage Methods 0.000 title claims abstract description 126
- 239000003292 glue Substances 0.000 claims abstract description 57
- 239000011247 coating layer Substances 0.000 claims abstract description 24
- 239000012790 adhesive layer Substances 0.000 claims description 55
- 239000010410 layer Substances 0.000 claims description 52
- 239000012528 membrane Substances 0.000 claims description 14
- 238000010030 laminating Methods 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 31
- 238000000576 coating method Methods 0.000 abstract description 31
- 230000037303 wrinkles Effects 0.000 abstract description 11
- 230000005611 electricity Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- 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
Abstract
The application provides an energy storage device, an outer coating film and electronic equipment, wherein the energy storage device comprises a side plate and an outer coating film, the outer coating film comprises a bottom coating part, a first side coating part and a second side coating part, the first side coating part is provided with a first notch groove, the second side coating part is provided with a second notch groove, the first side coating part comprises a first attaching part and a first side attaching part, the second side coating part comprises a second attaching part and a second side attaching part, the bottom coating part is attached to the outer surface of the side plate, the first attaching part is laminated on the surface of the bottom coating part, which is away from the side plate, the glue coating layer of the first attaching part is adhered with the glue coating layer of the first side attaching part, is laminated on the outer surface of the side plate, and is exposed out of the first notch groove. The attachment position of the outer coating film on the side plate is easy to correct, wrinkles are not easy to occur, and the service life of the electronic equipment is ensured.
Description
Technical Field
The application relates to the technical field of energy storage devices, in particular to an energy storage device, an outer coating film and electronic equipment.
Background
The housing of the energy storage device is typically metallic and is electrically conductive and requires an insulating outer envelope to cover the housing of the energy storage device. In the prior art, the coating of the casing is usually performed using an outer coating film coated with a glue layer. However, when the cladding, because the casing relates to the surface subsides of a plurality of different directions, the part that the casing surface of different directions exceeded in the turning position needs to fold and establishes, because the overcoat all is coated with the rubberizing layer, is easily glued together by electrostatic attraction each other to dislocation and fold because of the dislocation leads to when attaching easily takes place, and then influences pad pasting efficiency. In addition, the electronic equipment generally uses hundreds to thousands of energy storage devices at the same time, and in order to ensure that the electronic equipment has higher service life, the consistency of the outer coating film structure of the energy storage devices is required to be high.
Disclosure of Invention
The embodiment of the application aims to provide an energy storage device, an outer coating film and electronic equipment, wherein the outer coating film is used for easily correcting the misplacement position when the outer coating film is attached to the shell of the energy storage device, so that the outer coating film is not easy to wrinkle on the shell of the energy storage device, the outer coating film attached to the shell of the energy storage device is high in structural consistency, and the service life of the electronic equipment is further guaranteed.
The embodiment of the application provides an energy storage device, which comprises a shell and an outer coating film, wherein the shell comprises a bottom plate, two oppositely arranged panels and two oppositely arranged side plates, the two panels and the two side plates are fixedly connected to the same side of the bottom plate, the two side plates are fixedly connected between the two panels, the outer coating film comprises a first film,
the first film comprises a body and a rubberized layer covering one side surface of the body, the first film comprises a bottom film, two face masks and two side films, the bottom film is used for covering the outer surface of the bottom plate, the two face masks are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the two panels, and the two side films are respectively used for covering the outer surfaces of the two side plates; each side film comprises a bottom wrapping part, a first side wrapping part and a second side wrapping part, wherein the first side wrapping part and the second side wrapping part are connected to the opposite sides of the bottom wrapping part;
each side film is provided with a first notch groove and a second notch groove which is arranged at intervals with the first notch groove; the first notch groove is arranged on the first side wrapping part, penetrates through the first side wrapping part along the thickness direction of the first side wrapping part and penetrates through the outer edge of the first side wrapping part, and the bottom surface of the first notch groove is arranged at intervals with the inner edge of the first side wrapping part; the second notch groove is arranged on the second side wrapping part, penetrates through the second side wrapping part along the thickness direction of the second side wrapping part and penetrates through the outer edge of the second side wrapping part, and the bottom surface of the second notch groove is arranged at intervals with the inner edge of the second side wrapping part;
The first side wrapping part comprises a first attaching part and a first side attaching part, the first attaching part is connected between the side surface of the first notch groove facing the bottom wrapping part and the bottom wrapping part, and the first side attaching part is connected with the first attaching part; the second side wrapping part comprises a second attaching part and a second side attaching part, the second attaching part is connected between the side surface of the second notch groove facing the bottom wrapping part and the bottom wrapping part, and the second side attaching part is connected with the second attaching part;
the surface of the first side attaching part, which is provided with the glue coating layer, is laminated and attached to one surface of the first attaching part, which is provided with the glue coating layer, of the first side attaching part, the surface of the bottom attaching part, which is not provided with the glue coating layer, is folded and attached to the outer surface of the side plate, and a part of the first notch groove is exposed;
in the second side wrapping part, the second attaching part is folded relative to the bottom wrapping part, a surface of the second attaching part, which is not provided with the glue coating layer, is laminated and attached to a part of the surface of the bottom wrapping part, which is away from the side plate, which is not provided with the glue coating layer, the second side attaching part is folded relative to the second attaching part, a surface of the second attaching part, which is provided with the glue coating layer, is laminated and attached to a part of the surface of the bottom wrapping part, which is away from the side plate, which is not provided with the glue coating layer, the outer surface of the side plate, and a surface of the first side attaching part, which is away from the side plate, which is not provided with the glue coating layer, are laminated and attached to a part of the second incision groove;
The surface of the part of the bottom wrapping part, which is away from the side plate and is not provided with the rubberized layer, is exposed.
The application provides an energy storage device, which can avoid the problem that a side film folds in the wrapping process by arranging the first notch groove on the first side wrapping part and the second notch groove on the second side wrapping part in the side film, thereby being beneficial to improving the consistency of the energy storage device, prolonging the service life of electronic equipment and being convenient for folding the side film. In addition, the glue coating layer of the first attaching portion in the first side wrapping portion is adhered to the glue coating layer of the first side attaching portion, so that the surface of the first attaching portion, which faces away from the first side attaching portion, is free of the glue coating layer, that is, the surface of the first attaching portion, which faces towards the bottom wrapping portion, is free of the glue coating layer. When the first attaching portion is stacked on the surface of the bottom package portion, which is away from the side plate, as the surface of the first attaching portion, which faces the bottom package portion, is not coated with the adhesive layer, under the condition that the first side package portion is askew or wrong in attaching, an operator can lift the first film from the first attaching portion without adhesiveness, so that the film attaching position can be corrected again. Meanwhile, the glue coating layer of the second attaching part in the second side wrapping part is adhered to the glue coating layer of the second side attaching part, so that the surface of the second attaching part, which is away from the second side attaching part, is free of the glue coating layer. That is, the surface of the second attaching portion facing the bottom wrapping portion has no adhesive coating layer, so that when the second side wrapping portion is askew or misplaced, the operator can lift the first film from the non-adhesive second attaching portion to correct the film attaching position again.
The first film is used for easily correcting the misplacement position when being attached to the shell of the energy storage device, so that the outer film is not easy to wrinkle on the shell of the energy storage device, the outer film attached to the shell of the energy storage device is high in structural consistency, and the service life of electronic equipment is guaranteed.
In one possible embodiment, the outer wrapping film further comprises two second films, each second film comprises a first film portion and a second film portion connected with the first film portion, the first film portion comprises a surface, facing away from the side plate, provided with a first adhesive layer and another surface, facing the side plate, not provided with the first adhesive layer, the first film portion is arranged between the side plate and the bottom wrapping portion, and a surface, facing the side plate, provided with the first adhesive layer is bonded with the bottom wrapping portion, provided with a glue coating layer, the second film portion comprises a surface, facing the side plate, provided with a second adhesive layer, the second film portion protrudes relative to the outer edge of the bottom wrapping portion, and a surface, provided with the second adhesive layer, is bonded with the outer surface of the side plate. When the bonding position of the bottom wrapping part and the side plate is misplaced, the second film part of the second film is easily lifted to uncover the bottom wrapping part from the side plate, so that the attaching position of the bottom wrapping part on the side plate can be adjusted, the attaching position of the bottom wrapping part can be corrected when the bottom wrapping part is attached askew, and the first film is prevented from being wrinkled when wrapping the shell. In addition, the surface of the first film part facing the side plate has no adhesiveness, so that the second film is easier to uncover from the side plate, and further, the second film is conveniently lifted to adjust the attaching position of the bottom package part on the side plate, and the first film is further ensured to cover the shell, so that wrinkles are not easy to occur.
In one possible embodiment, the side plate is provided with a groove, an opening of the groove is formed in an outer surface of the side plate, the groove is recessed from the outer surface of the side plate toward an inner side of the housing and penetrates through an end surface of the side plate toward the bottom plate, and a surface, provided with the second adhesive layer, of the second film portion toward the side plate is adhered to the outer surface of the side plate and partially covers the opening of the groove. Through set up the recess on the curb plate, when mentioning the second membrane portion of first membrane, can guide the recess alignment of second membrane portion and curb plate to realize fixing a position the position of second membrane portion on the curb plate, thereby ensure that the end package portion that bonds with first membrane portion can not appear misplacing in the bonding position of curb plate, and then further avoided the side membrane to appear the problem of fold at the parcel in-process.
In one possible embodiment, the width of the groove is D, the width of the orthographic projection of the second film portion on the side plate is L, D < L, so that the second film portion extends beyond the groove in the width direction of the groove, and the portion of the second film portion above the groove is suspended. On the one hand, when the second membrane portion is adhered to the outer surface of the side plate, the bottom wrapping portion is not easy to wrinkle, so that the outer coating is smooth. On the other hand, when the bonding position of the bottom package part and the side plate is misplaced, the second film is easy to uncover by lifting the suspended part of the second film above the groove, so that the bottom package part is easy to uncover from the side plate, the attaching position of the bottom package part on the side plate can be adjusted, the attaching position of the bottom package part can be corrected when the bottom package part is attached askew, and the first film is not easy to wrinkle when the first film covers the shell.
In one possible implementation, D/l=0.7 to 0.8. Too small a ratio of D/L may cause excessive adhesion of the material of the second adhesive layer of the second film portion to the outer surface of the side plate located at both sides of the groove, and when the second film portion is misaligned with the groove to cause the second film portion to be attached to the outer surface of the side plate, correction is inconvenient. Too large a ratio of D/L may cause the edges of the second film portion in the X-axis width direction to be not reliably attached to the outer surfaces of the side plates on both sides of the groove.
In one possible embodiment, the width of the bottom package is W1, the width of the orthographic projection of the bottom package on the side plate is W2, w2=w1, i.e. the bottom package can be leveled and adhered to the outer surface of the side plate by the second film.
In one possible embodiment, the depth extending from the opening of the first kerf slot to the bottom surface of the first kerf slot is Z1, and the depth extending from the opening of the second kerf slot to the bottom surface of the second kerf slot is Z2, 0.ltoreq.IZ2-Z1.ltoreq.1 mm.
In one possible embodiment, the width of the first side pocket is W3, 45% or less Z1/W3 or less 65%, and the width of the second side pocket is W4, 45% or less Z2/W4 or less 65%.
In one possible embodiment, the distance between the side surface of the first incision groove facing the foundation bag portion and the edge of the foundation bag portion facing the first incision groove is h1, and the distance between the side surface of the second incision groove facing the foundation bag portion and the edge of the foundation bag portion facing the second incision groove is h2, 0.ltoreq.h1-h2.ltoreq.1 mm.
In one possible embodiment, the width of the first side pocket is W3, 0.4.ltoreq.h1/W3.ltoreq.0.7, and the width of the second side pocket is W4, 0.4.ltoreq.h2/W4.ltoreq.0.7.
The embodiment of the application also provides an outer coating film, which comprises a body and a glue coating layer coated on the body, wherein the glue coating layer is used for attaching the shell of the energy storage device, and the outer coating film comprises a first film;
the first film comprises a bottom film, two face masks and two side films, wherein the bottom film is used for covering the outer surface of the bottom plate, the two face masks are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the two panels, and the two side films are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the side plates;
each side film comprises a bottom wrapping part, a first side wrapping part and a second side wrapping part, wherein the first side wrapping part and the second side wrapping part are connected to the opposite sides of the bottom wrapping part;
each side film is provided with a first notch groove and a second notch groove which is arranged at intervals with the first notch groove, the first notch groove is arranged on the first side wrapping part, the first notch groove penetrates through the first side wrapping part along the thickness direction of the first side wrapping part and penetrates through the outer edge of the first side wrapping part, and the bottom surface of the first notch groove and the inner edge of the first side wrapping part are arranged at intervals;
The second notch groove is arranged on the second side wrapping part and is positioned on two opposite sides of the bottom film from the first notch groove, penetrates through the second side wrapping part along the thickness direction of the second side wrapping part and penetrates through the outer edge of the second side wrapping part, and the bottom surface of the second notch groove is arranged at intervals with the inner edge of the second side wrapping part;
each side film is provided with a first inclined crease and a second inclined crease, the first inclined crease comprises a first fixed end and a first free end, the first fixed end is an intersection point of the side film, the first mask and the bottom film, the first free end and the side surface of the first notch towards the second notch are intersected, the distance between the first free end and the bottom surface of the first notch is H1, and H1 is larger than 0;
the second inclined crease comprises a second fixed end and a second free end, the second fixed end is an intersection point of the side film, the second mask and the bottom film, the second free end and the second notch groove are arranged in an intersecting manner towards the side surface of the first notch groove, the distance between the second free end and the bottom surface of the second notch groove is H2, and H2 is larger than 0;
the first side wrapping part comprises a first attaching part and a first side attaching part, and the first inclined crease is connected between the first side attaching part and the first attaching part; the second side wrapping part comprises a second attaching part and a second side attaching part, and the second inclined crease is connected between the second side attaching part and the second attaching part.
The outer envelope that this embodiment provided through set up first incision groove and second incision groove at the side membrane, controls first incision groove simultaneously and compares in the excessive cutting volume of first oblique crease to and the second incision groove compares in the excessive cutting volume of second oblique crease, has avoided the problem of fold to appear in the parcel process, thereby has promoted energy memory's uniformity, does benefit to and promotes electronic equipment life, the folding side membrane of being convenient for simultaneously.
In one possible embodiment, the outer wrapping film further comprises two second films, each second film comprises a first film portion and a second film portion connected with the first film portion, the first film portion comprises a surface provided with a first bonding layer and another surface not provided with the first bonding layer, the first bonding layer is bonded with the glue coating layer of the bottom wrapping portion, the outer edge of the second film portion opposite to the bottom wrapping portion protrudes, and the surface, away from the bottom wrapping portion, of the second film portion is provided with the second bonding layer. In addition, during the process of folding along the first oblique crease and the second oblique crease, the over-cut amount of the first notch groove compared with the first oblique crease and the over-cut amount of the second notch groove compared with the second oblique crease are uncontrollable, so that the crease and the bubble can be caused when the side film covers the side plate due to the inconformity of the crease positions of the first oblique crease and the second oblique crease. According to the application, the side film of the first film is bonded by using the second film, the second film is lifted up to drive the middle sole wrapping part of the side film to be bonded with the outer surface of the side plate, and meanwhile, the middle sole wrapping part of the side film can be leveled by using the second film, so that the flatness of the side plate wrapped by the middle sole wrapping part can be ensured. When the problem that the wrinkles or the bubbles occur due to the fact that the dislocation occurs in the bonding positions of the bottom wrapping portion and the side plates, the bottom wrapping portion can be separated from the side plates by pulling the second film, so that the adjustment of the wrapping position of the bottom wrapping portion on the side plates is achieved, the flatness of the side plates wrapped by the bottom wrapping portion is guaranteed, the consistency of the energy storage device is improved, and the service life of the electronic equipment is prolonged.
In one possible implementation manner, the H1 is 0.3mm to 0.6mm, so that the first notch is ensured to be compared with the over-cut amount of the first oblique crease, the side film is ensured not to be wrinkled when being folded along the first oblique crease, and the attaching reliability of the first film is improved.
In a possible implementation manner, the H2 is 0.3mm to 0.6mm, so that the second notch groove is ensured to be compared with the over-cut amount of the second oblique crease, the side film is ensured not to be wrinkled when being folded along the second oblique crease, and the attaching reliability of the first film is improved.
In one possible embodiment, h1=h2.
The embodiment of the application also provides electronic equipment, which is provided with the energy storage device, and the energy storage device supplies power for the electronic equipment.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an application scenario diagram of an energy storage device provided by an embodiment of the present application applied to an energy storage system;
Fig. 2 is a schematic structural diagram of an energy storage device according to an embodiment of the present application;
FIG. 3 is an exploded view of the energy storage device of FIG. 2;
FIG. 4 is a schematic view of a side plate of a housing assembly of the energy storage device shown in FIG. 3;
FIG. 5 is a schematic side view of a second membrane of an outer envelope of the energy storage device of FIG. 3;
FIG. 6 is a schematic top view of the second film of FIG. 5;
FIG. 7 is a schematic view of a first membrane of an outer envelope of the energy storage device of FIG. 3 in an expanded state;
FIG. 8 is a schematic cross-sectional view of the energy storage device shown in FIG. 2;
FIG. 9 is a schematic view of a portion of a flow chart of the assembly of the housing and the outer membrane of the energy storage device shown in FIG. 2;
FIG. 10 is a schematic flow diagram of another portion of the assembly of the housing and the outer envelope of the energy storage device of FIG. 2;
fig. 11 is a schematic side view of a second membrane of an outer envelope in an energy storage device according to a second embodiment of the application.
Reference numerals: a photovoltaic panel 2000; a fan 3000; a power grid 4000; an energy storage device 1; a housing assembly 100; 200. An outer envelope; 300. A positive electrode post; 400. A negative electrode column; 101. A housing; 102. A top patch; 110. A side plate; 120. A bottom plate; 130. A panel; 140. A top cover; 111. An outer surface; 113. An inner surface; 115. A groove; 51. a hollowed-out part; 210. A second film; 220. A first film; 211. A body; 212. An adhesive layer; 211a, a first face; 211b, a second face; r1, a first body portion; r2, a second body portion; q1, a first adhesive layer; q2, a second bonding layer; q3, a third bonding layer; 10. a first film portion; 30. a second film portion; p1, side films; p1a, side film; p1b, side film; p2, a bottom film; p3, a mask; p3a, a first mask; p3b, a second mask; p4, top film; p10, a bottom packaging part; p30, a first side wrapping; p31, the first laminating part; p33, a first side paste part; p50, a second side wrapping part; p51, the second laminating part; p53, second side patch portion; 203a, a first kerf slot; 203b, a first kerf slot; 204a, a second cutout groove; 204b, a second cutout groove; 240. a first diagonal fold; 250. A second diagonal fold; 201. A first edge; 202. a second edge; 221. side edge folds; 222a, first bottom edge folds; 222b, second bottom edge folds; 223. and (5) creasing the top edge.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Because of the strong timeliness and space properties of energy required by people, in order to reasonably utilize the energy and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then converted into another energy form, and the energy is released in a specific energy form based on future application. At present, the generation of green electric energy generally depends on photovoltaic, wind power, water potential and the like, but wind energy, solar energy and the like generally have the problems of strong intermittence and large fluctuation, which can cause unstable power grid, insufficient peak electricity consumption, too much electricity consumption and unstable voltage can cause damage to the electric power, so that the problem of 'wind abandoning and light abandoning' possibly occurs due to insufficient electricity consumption requirement or insufficient power grid acceptance, and the problem needs to be solved by relying on energy storage. The energy is converted into other forms of energy through physical or chemical means and is stored, the energy is converted into electric energy when needed and released, in short, the energy storage is similar to a large-scale 'charge pal', the electric energy is stored when the photovoltaic and wind energy are sufficient, and the stored electric power is released when needed.
Taking electrochemical energy storage as an example, the scheme provides an energy storage device, wherein a group of chemical batteries are arranged in the energy storage device, chemical elements in the chemical batteries are mainly used as energy storage media, and the charge and discharge process is accompanied with chemical reaction or change of the energy storage media.
The existing energy storage (i.e. energy storage) application scene is wider, including aspects such as (wind and light) power generation side energy storage, electric network side energy storage, base station side energy storage and user side energy storage, the types of corresponding energy storage devices include:
(1) The large energy storage container applied to the energy storage scene at the power grid side can be used as a high-quality active and reactive power regulation power supply in the power grid, so that the load matching of electric energy in time and space is realized, the renewable energy consumption capability is enhanced, and the large energy storage container has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation.
(2) The small and medium energy storage electric cabinet is applied to industrial and commercial energy storage scenes (banks, markets and the like) at the user side, and the main operation mode is peak clipping and valley filling. Because of the large price difference of the electricity charge at the peak-valley position according to the electricity consumption requirement, after the energy storage equipment is arranged by a user, in order to reduce the cost, the energy storage cabinet/box is charged usually in the electricity price valley period; and in the peak period of electricity price, the electricity in the energy storage equipment is released for use, so that the purpose of saving electricity charge is achieved.
Referring to fig. 1, fig. 1 is an application scenario diagram of an energy storage device 1 applied to an energy storage system according to an embodiment of the present application. The energy storage device 1 provided by the embodiment of the application is applied to an energy storage system, the energy storage system comprises an electric energy conversion device (a photovoltaic panel 2000), a wind energy conversion device (a fan 3000), a power grid 4000 and the energy storage device 1, and the energy storage device 1 can be used as an energy storage cabinet and can be installed outdoors. In particular, the photovoltaic panel 2000 may convert solar energy into electric energy during low electricity price period, and the energy storage device 1 is used to store the electric energy and supply the electric power to the electric grid 4000 during peak electricity consumption or supply the electric power during power failure/power outage of the electric grid 4000. The wind energy conversion device (fan 3000) can convert wind energy into electric energy, and the energy storage device 1 is used for storing the electric energy and supplying the electric network 4000 at the time of peak electricity consumption or supplying the electric network 4000 with electricity at the time of power failure/power failure. The transmission of the electric energy can be performed by adopting a high-voltage cable.
The number of the energy storage devices 1 may be several, and the several energy storage devices 1 are connected in series or parallel, and the several energy storage devices 1 are supported and electrically connected by using a separator (not shown). In this embodiment, "a plurality of" means two or more. The energy storage device 1 may be further provided with an energy storage box for accommodating the energy storage device 1.
It is understood that the energy storage device 1 may include, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, and the like. The practical application form of the energy storage device provided by the embodiment of the application can be, but is not limited to, the listed products, and can also be other application forms, and the embodiment of the application does not strictly limit the application form of the energy storage device 1.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of an energy storage device 1 according to an embodiment of the present application, and fig. 3 is an exploded structural diagram of the energy storage device 1 shown in fig. 2.
For convenience of description, the length direction of the energy storage device 1 shown in fig. 2 is defined as the Y-axis direction, the width direction is defined as the X-axis direction, the height is defined as the Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. The terms of "top" and "bottom" and other directions mentioned in the description of the energy storage device 1 according to the embodiments of the present application are described according to the directions shown in fig. 2 of the specification, where the direction toward the positive Z axis is "top" and the direction toward the negative Z axis is "bottom", which do not limit the energy storage device 1 in the practical application scenario.
The energy storage device 1 includes a housing assembly 100, a battery cell (not shown in fig. 2 and 3), a positive post 300, a negative post 400, and an outer envelope 200. The battery cell is mounted on the inner side of the housing assembly 100, the positive electrode column 300 and the negative electrode column 400 are both mounted on the housing assembly 100 and are electrically connected with the battery cell, and the outer envelope 200 is attached to the housing assembly 100.
Specifically, in this embodiment, the battery cell includes a positive electrode sheet, a negative electrode sheet, and a separator located between the positive electrode sheet and the negative electrode sheet. And after the positive plate, the diaphragm and the negative plate are sequentially stacked, winding to form the battery cell. The positive electrode post 300 is electrically connected with the positive electrode plate to realize the electrical connection between the positive electrode post 300 and the battery cell. The negative electrode column 400 is electrically connected with the negative electrode sheet to realize electrical connection between the negative electrode column 400 and the battery cell. The positive electrode post 300 and the negative electrode post 400 each protrude from the housing assembly 100 in a direction away from the battery cell, so that the energy storage device 1 is electrically connected to external equipment.
Referring to fig. 3 and fig. 4 in combination, fig. 4 is a schematic structural diagram of a side plate 110 of the housing assembly 100 in the energy storage device 1 shown in fig. 3.
The housing assembly 100 includes a housing 101 and a top patch 102, the top patch 102 being mounted to a top side of the housing 101. The longitudinal direction of the housing 101 is the Y-axis direction, the width direction is the X-axis direction, and the height direction is the Z-axis direction.
Specifically, the housing 101 includes two oppositely disposed side panels 110, a bottom panel 120, two oppositely disposed face panels 130, and a top cover 140. The two side plates 110 are disposed opposite to each other in the first direction, i.e., in the Y-axis direction in this embodiment. The two panels 130 are disposed opposite to each other along the second direction, i.e., along the X-axis direction in the present embodiment. The bottom plate 120 and the top cover 140 are disposed opposite to each other in the third direction, i.e., in the Z-axis direction in this embodiment. The two side plates 110 and the two face plates 130 are fixedly connected to the same side of the bottom plate 120. Both side plates 110 are fixedly connected between the two panels 130. The top cover 140 is fixedly coupled to the same side of the two side plates 110 and the two face plates 130. The two side plates 110, the bottom plate 120, the two panels 130 and the top cover 140 together enclose a housing cavity, and the housing cavity can house the battery cell. Illustratively, the side panels 110, the bottom panel 120, the face panel 130, and the top cover 140 are all made of aluminum. Herein, the "outer surface" of the housing 101 refers to a surface of the housing 101 facing away from the accommodating cavity. Wherein the "top surface" of the top cover 140 refers to the surface of the top cover 140 facing away from the side plate 110.
The side plate 110 includes an outer surface 111 and an inner surface 113 disposed opposite to each other, wherein the outer surface 111 of the side plate 110 is a surface of the side plate 110 facing away from the accommodating cavity, and the inner surface 113 of the side plate 110 is a surface of the side plate 110 facing toward the accommodating cavity. The side plate 110 is provided with a groove 115, and an opening of the groove 115 is provided on the outer surface 111 of the side plate 110. The groove 115 is recessed from the outer surface 111 of the side plate 110 toward the inner surface 113 of the side plate 110, and penetrates the end surface of the side plate 110 toward the bottom plate 120 and penetrates the end surface of the side plate 110 toward the top cover 140. In other embodiments, the groove 115 may not extend through the end surface of the side plate 110 facing the top cover 140, but may extend through only the end surface of the side plate 110 facing the bottom plate 120. In the present embodiment, the width of the side plate 110 is W, and the width of the groove 115 is D.
The top patch 102 is mounted to the top side of the top cover 140. The top patch 102 is provided with two hollowed-out portions 51, and the two hollowed-out portions 51 are arranged at intervals along the Y-axis direction. Each hollowed-out portion 51 penetrates through the top patch 102 along the thickness direction of the top patch 102, and is used for exposing the positive electrode post 300 and the negative electrode post 400 respectively.
Referring to fig. 3, 5 and 6 in combination, fig. 5 is a schematic side view of the second film 210 of the outer envelope 200 in the energy storage device 1 shown in fig. 3, and fig. 6 is a schematic top view of the second film 210 shown in fig. 5. Fig. 6 is a plan view from the second surface 211b to the first surface 211 a.
The outer envelope 200 includes a second film 210 and a first film 220. In this embodiment, there are two second films 210, one first film 220, and both second films 210 are bonded to the first film 220.
Each of the second films 210 includes a body 211 and an adhesive layer 212 covering the body 211. The body 211 includes a first face 211a and a second face 211b disposed opposite to each other in the thickness direction of the body 211. The body 211 includes a first body portion R1 and a second body portion R2 connected to the first body portion R1. The adhesive layer 212 includes a first adhesive layer Q1 provided on the first body portion R1 and a second adhesive layer Q2 provided on the second body portion R2.
The second film 210 includes a first film portion 10 and a second film portion 30. The first film portion 10 includes a first body portion R1 and a first adhesive layer Q1. In this embodiment, the first adhesive layer Q1 is adhered to the first face 211a of the first body portion R1. The second film portion 30 includes a second body portion R2 and a second adhesive layer Q2. In this embodiment, the second adhesive layer Q2 is adhered to the second face 211b of the second body portion R2. The width of the second film portion 30 extending in the X-axis width direction is H.
Referring to fig. 7, fig. 7 is a schematic view illustrating a region division of the first film 220 of the outer envelope 200 in the energy storage device 1 shown in fig. 3 in an expanded state.
The first film 220 includes a body and a coating layer coated on one side surface of the body. Wherein the body is an insulating layer for protecting the casing 101. The adhesive layer is coated on one side surface of the body and is used to bond the body and the case 101. When the first film 220 is attached to the housing 101, the adhesive layer faces the housing 101, the body is coated on the outer surface of the housing 101, and the top patch 102 covers part of the body of the first film 220.
Specifically, the first film 220 includes two side films P1, a bottom film P2, two face films P3, and two top films P4. In the Y-axis direction, two side films P1 are respectively located at opposite ends of the base film P2. The carrier film P2 is connected between the two side films P1. In the present embodiment, the two masks P3 include a first mask P3a and a second mask P3b. Along the X-axis direction, the films are respectively positioned on two opposite sides of the bottom film P2 and are connected between the two side films P1. One top film P4 is connected to one side of the two side films P1 toward the positive X-axis direction, and is connected to the first face film P3 a. The other top film P4 is connected to one side of the two side films P1 facing the negative X-axis direction and connected to the second face film P3b. Wherein each side film P1 is used to cover the outer surface of one side plate 110, the bottom film P2 is used to cover the outer surface of the bottom plate 120, and the first and second films P3a and P3b are respectively used to cover the outer surfaces of two panels 130. Each of the top films P4 is for partially covering the outer peripheral edge of the top surface of the top cover 140.
The width of each side film P1 is greater than 1/2W, i.e., the width of each side film P1 is greater than half the width of the side plate 110. Specifically, in the present embodiment, the two side films P1 are a side film P1a and a side film P1b, respectively, the side film P1a is located at one side of the bottom film P2 along the negative Y-axis direction, and the side film P1b is located at one side of the bottom film P2 along the positive Y-axis direction. The width of the side film P1a is L1, and D1 is more than 1/2W. The width of the side film P1b is L2, and L2 is more than 1/2W. In this embodiment, l1=l2. In other embodiments, L1 and L2 may not be equal.
Wherein each side film P1 includes a bottom package P10, a first side package P30, and a second side package P50. In each side film P1, the bottom package portion P10 adjoins the bottom film P2. The first side wrapping portion P30 is adjacent to the first face film P3 a. The second side wrapping portion P50 is adjacent to the second panel P3b, and is connected to the first side wrapping portion P30 at opposite sides of the bottom wrapping portion P10 along the X-axis direction. The bottom wrapping portions P10 of the two side films P1 are connected to opposite sides of the bottom film P2 along the Y-axis direction, the first side wrapping portions P30 of the two side films P1 are connected to opposite sides of the first panel P3a along the Y-axis direction, and the second side wrapping portions P50 of the two side films P1 are connected to opposite sides of the second panel P3b along the Y-axis direction. The width of the bottom package P10 is W1, the width of the first side package P30 is W3, and the width of the second side package P50 is W4. In this embodiment, w1=w3=w4=width L1 of the side film P1 a.
Each side film P1 is provided with a first slit groove and a second slit groove spaced from the first slit groove, in this embodiment, the side film P1a is provided with a first slit groove 203a and a second slit groove 204a, and the side film P1b is provided with a first slit groove 203b and a second slit groove 204b. The first cutout groove 203a in the side film P1a and the first cutout groove 203b in the side film P1b are located on opposite sides of the first panel P3a in the Y-axis direction, and the second cutout groove 204a in the side film P1a and the second cutout groove 204a in the side film P1b are located on opposite sides of the second panel P3b in the Y-axis direction. The first notch 203a in the side film P1a may be the same as or different from the first notch 203b in the side film P1 b. The second cutout groove 204a in the side film P1a and the second cutout groove 204b in the side film P1b may be the same or different. Hereinafter, the side film P1a will be described as an example.
In the side film P1a, the second slit groove 204a is provided at an interval from the first slit groove 203a in the X-axis direction. Specifically, the first notch 203a is provided in the first side pocket P30. The first cutout groove 203a penetrates the first side pocket P30 in the thickness direction of the first side pocket P30, and penetrates the outer edge of the first side pocket P30. The bottom surface of the first notch 203a is spaced apart from the inner edge of the first side pocket P30. The depth extending from the opening of the first notch 203a to the bottom surface of the first notch 203a is Z1. The distance between the side surface of the first cutout groove 203a facing the bottom package P10 and the edge of the bottom package P10 facing the first cutout groove 203a is h1.
The first side wrapping portion P30 includes a first attaching portion P31 and a first side attaching portion P33 connected to the first attaching portion P31. Wherein, the first attaching portion P31 is connected between the side surface of the first notch 203a facing the bottom package P10 and the bottom package P10. In some embodiments, 45% and less than or equal to Z1/W3 and less than or equal to 65%, when the bottom package portion P10 is folded upwards, it can be ensured that the bottom package portion P10 can be flat and fully attached to the corresponding position of the outer surface of the side plate 110, because the bottom surface of the first notch 203a is folded upwards at the maximum, if the depth Z1 of the first notch 203a is too small, the maximum degree of upward folding of the bottom package portion P10 is reflected by the maximum depth of the first notch 203a, at this time, the too shallow first notch 203a causes the bottom package portion P10 to be folded upwards to an insufficient extent, and wrinkles and bulges occur between the bottom package portion P10 and the bottom film P2, which is inconvenient for the bottom package portion P10 to be folded upwards. If the depth Z1 of the first incision groove 203a is too large, at this time, the maximum width of the bottom wrapping portion P10 is taken as the maximum degree of upward folding, and although upward flat folding is realized, there is an overflow first incision groove 203a, that is, the first incision groove 203a exposed outside is too long, on the one hand, in order to realize flat wrapping when the first film 220 of the outer wrapping film 200 is folded upward, the first film 220 is pulled by hand to be stretched and flattened, at this time, if the first incision groove 203a is too large, under the condition that the films on both sides of the first incision groove 203a are unevenly stressed, the first film 220 is cracked again from the position of the first incision groove 203a when the first film 220 is stretched and attached, so that the first film 220 is wasted, and the yield of the battery core and the film attaching efficiency of the energy storage device 1 are affected; in addition, the housing 101 of the energy storage device 1 is made of metal, and the first notch 203a is too deep in the later use process of the energy storage device 1, so that moisture, dust impurities and electrostatic dust enter between the first film 220 and the housing 101 of the energy storage device 1 from the first notch 203a, which results in failure of the adhesive layer of the first film 220, further resulting in falling of the first film 220, and affecting the safety performance of the energy storage device 1.
In some embodiments, h1/W3 is 0.4-0.7, and too small h1 is inconvenient for the first attaching portion P31 to fold up smoothly, and when h1 is too large, the attaching area of the first attaching portion P31 to the first side attaching portion P33 is larger, and the remaining d1 (see fig. 10) portion of the corresponding first side attaching portion P33 is narrower, resulting in too narrow attaching area of the first side attaching portion P33 to the bottom package portion P10, which is detrimental to the strength and stability of the first film 220 of the outer envelope (200); and h1 is too large or even exceeds the width W3 of the first side wrapping portion P30, the first attaching portion P31 is not capable of covering the exposed portion of the first notch 203a even if it is folded up, and since the first notch 203a has a certain width, there is a gap between the films on two sides of the first notch 203a, which is easy to cause the attachment failure of the outer wrapping film 200, and thus the short circuit risk of the energy storage device 1 is caused.
The second notch 204a is provided in the second side pocket P50. The second slit groove 204a penetrates the second side wrapping portion P50 in the thickness direction of the second side wrapping portion P50 of the side film P1, and penetrates the outer edge of the second side wrapping portion P50. The bottom surface of the second notch 204a is spaced apart from the inner edge of the second side pack P50. The depth extending from the opening of the second kerf slot 204a to the bottom surface of the second kerf slot 204a is Z2. Wherein, Z2-Z1 is more than or equal to 0 and less than or equal to 1mm. In the present embodiment, z2=z1 so as to form the first kerf slots 203a and the second kerf slots 204a using the same dicing standard dicing. The distance between the side surface of the second cutout groove 204a facing the first cutout groove 203a and the edge of the bottom package P10 facing the second cutout groove 204a is h2. The h is more than or equal to 0 and less than or equal to 1mm from h1 to h2. In this embodiment, h1—h2=0, i.e., h2=h1, is advantageous for making the exposed first notch 203a and the second notch 204a symmetrical, so that the coating appearance of the outer envelope 200 is regular.
The second side wrapping portion P50 includes a second attaching portion P51 and a second side attaching portion P53 connected to the second attaching portion P51. The second attaching portion P51 is connected between the side surface of the second notch 204a facing the bottom package P10 and the bottom package P10.
In some embodiments, 45% and less than or equal to Z2/W4 and less than or equal to 65%, when the bottom package portion P10 is folded upwards, it can be ensured that the bottom package portion P10 can be flat and fully attached to the corresponding position of the outer surface of the side plate 110, because the bottom surface of the second notch 204a is folded upwards at the maximum, if the depth Z2 of the second notch 204a is too small, the maximum degree of upward folding of the bottom package portion P10 is reflected by the maximum depth of the second notch 204a, at this time, the too shallow second notch 204a causes the bottom package portion P10 to be folded upwards to an insufficient extent, and wrinkles and bulges occur between the bottom package portion P10 and the bottom film P2, which is inconvenient for the bottom package portion P10 to be folded upwards. If the depth Z2 of the second incision slot 204a is too large, at this time, the maximum width of the bottom wrapping portion P10 is taken as the maximum degree of upward folding, and although upward flat folding is realized, there is an overflow second incision slot 204a, that is, the second incision slot 204a exposed outside is too long, on the one hand, in order to realize flat wrapping when the first film 220 of the outer wrapping film 200 is folded upward, the first film 220 is pulled by hand to be stretched and flattened, at this time, if the second incision slot 204a is too large, under the condition that the films on both sides of the second incision slot 204a are unevenly stressed, the second incision slot 204a is cracked again from the position of the second incision slot 204a when the first film 220 is stretched and attached, so that the first film 220 is wasted, and the yield of the battery core and the film attaching efficiency of the energy storage device 1 are affected; in addition, the housing 101 of the energy storage device 1 is made of metal, and the second notch 204a is too deep in the later use process of the energy storage device 1, so that moisture, dust impurities and electrostatic dust enter between the first film 220 and the housing 101 of the energy storage device 1 from the second notch 204a, which causes the adhesive layer of the first film 220 to fail, further causing the first film 220 to drop, and affecting the safety performance of the energy storage device 1.
In some embodiments, h2/W3 is 0.4-0.7, and too small h2 is inconvenient for the second attaching portion P51 to fold up smoothly, and when h1 is too large, the attaching area of the second attaching portion P51 to the second attaching portion P51 is larger, and the remaining d2 (see fig. 10) portion of the corresponding second attaching portion P51 is narrower, resulting in too narrow attaching area of the second side attaching portion P53 to the bottom package portion P10, which is detrimental to the strength and stability of the first film 220 of the outer envelope (200); and h1 is too large or even exceeds the width W4 of the second side wrapping portion P50, the second attaching portion P51 does not cover the exposed portion of the second notch 204a even if it is folded up, and since the second notch 204a has a certain width, there is a gap between the films on two sides of the second notch 204a, which easily results in adhesion failure of the outer wrapping film 200, and thus a short circuit risk of the energy storage device 1 is caused.
In this embodiment, the extending direction of the first notch 203a is parallel to the extending direction of the second notch 204a, that is, the extending direction from the opening of the first notch 203a to the bottom surface of the first notch 203a is parallel to the extending direction from the opening of the second notch 204a to the bottom surface of the second notch 204a, and the cutting device can quickly form the first notch 203a and the second notch 204a by translating only the first film 220 without adjusting the angle.
A first diagonal fold 240 and a second diagonal fold 250 are also provided in each side film P1. Taking the side film P1a as an example, the first oblique crease is located at the first side wrapping portion P30. Specifically, the first diagonal fold 240 includes a first fixed end M1 and a first free end N1. The first fixed end M1 is an intersection point of the side film P1, the bottom film P2 and the first surface film P3 a. The first free end N1 is disposed to intersect with a side surface of the first kerf 203a facing the second kerf 204a, i.e., the first free end N1 is located between the opening of the first kerf 203a and the bottom surface of the first kerf 203 a. The distance between the first free end N1 of the first diagonal fold 240 and the bottom surface of the first notch 203a is H1, H1 is greater than 0, which ensures that the first notch 203a is more than the over-cut amount of the first diagonal fold 240, on one hand, the side film P1 of the first film 220 is convenient to fold along the first diagonal fold 240 when being attached, on the other hand, the first film 220 is ensured not to be wrinkled, the attaching reliability of the first film 220 is improved, on the other hand, after the first film 220 is attached, the over-cut part of the first notch 203a is ensured to be exposed, and the side film P1 of the first film 220 is convenient to be uncovered when the attaching position needs to be adjusted after the attaching. Exemplary, 0.3 mm.ltoreq.H1.ltoreq.0.6 mm.
The second diagonal fold 250 is located at the second side pocket P50. Specifically, the second diagonal crease 250 includes a second fixed end M2 and a second free end N2. The second fixed end M2 is an intersection point of the side film P1, the bottom film P2 and the second surface film P3 b. The second free end N2 is disposed to intersect the side surface of the second kerf slot 204a facing the first kerf slot 203a, i.e., the second free end N2 is located between the opening of the second kerf slot 204a and the bottom surface of the second kerf slot 204 a. The distance between the second free end N2 of the second diagonal crease 250 and the bottom surface of the second notch groove 204a is H2, and H2 is greater than 0, so that compared with the overscut amount of the second diagonal crease 250, the second notch groove 204a is ensured to be convenient to fold along the second diagonal crease 250 when the side film P1 of the first film 220 is attached, the first film 220 is ensured not to be wrinkled, the attaching reliability of the first film 220 is improved, and on the other hand, after the first film 220 is attached, the overscut part of the second notch groove 204a is ensured to be exposed, so that the side film P1 of the first film 220 is convenient to be uncovered when the attaching position needs to be adjusted after the first film 220 is attached. Exemplary, 0.3 mm.ltoreq.H2.ltoreq.0.6 mm. In this embodiment, h2=h1, that is, the crease positions of the second diagonal crease 250 on the side surface of the second kerf slot 204a facing the first kerf slot 203a are equal to the crease positions of the first diagonal crease 240 on the side surface of the first kerf slot 203a facing the second kerf slot 204 a. It is to be understood that in other embodiments, h2+.h1 is also possible.
In this embodiment, the first film 220 is integrally formed and rectangular, which is beneficial to cutting and forming the material of the first film 220, so as to reduce the processing procedure and reduce the cost. The first film 220 includes two first edges 201 and two second edges 202. The two first edges 201 are disposed opposite to each other along the Y-axis direction, and the two first edges 201 are the outer edges of the side films P1a and P1b, that is, the outer edges of the bottom package P10, the first side package P30, and the second side package P50, respectively. Each first edge 201 extends along the X-axis direction. The two second edges 202 are disposed opposite to each other along the X-axis direction, and the two second edges 202 are the outer edges of the two top films P4, respectively. Each second edge 202 extends along the Y-axis direction.
The first film 220 is provided with two side edge folds 221, a first bottom edge fold 222a, a second bottom edge fold 222b, and two top edge folds 223. The two side folds 221, the two top folds 223 and the two first edges 201 define two side films P1, respectively. The two side folds 221 are the inner edges of the side films P1a and P1b, that is, the inner edges of the bottom package P10, the first side package P30, and the second side package P50.
Specifically, the two side edge folds 221 are located between the two first edges 201, and are spaced apart along the Y-axis direction. The two side folds 221 are inner edges of the two side films P1, and each side film P1 can be folded along one side fold 221 relative to the bottom film portion S2. In this embodiment, two side folds 221 each extend along the X-axis direction and each extend from one second edge 202 to the other second edge 202.
The first bottom edge folds 222a and the second bottom edge folds 222b are located between the two second edges 202 and are spaced apart along the X-axis direction. The first bottom edge crease 222a is connected between the bottom film P2 and the first face film P3a, and the second bottom edge crease 222b is connected between the bottom film P2 and the second face film P3 b. The first panel P3a may be folded over against the carrier film P2 along the first bottom edge fold 222a, and the second panel P3b may be folded over against the carrier film P2 along the second bottom edge fold 222 b. The distance between the first bottom edge crease 222a and the second bottom edge crease 222b is the width W3 of the bottom film P2, and W3 is approximately equal to the width W1 of the side plate 110.
In this embodiment, the first bottom edge crease 222a and the second bottom edge crease 222b each extend along the Y-axis direction and each extend from one first edge 201 to the other first edge 201. The intersection point formed by the intersection of the first bottom edge crease 222a and one side edge crease 221 is the first fixed end M1 of the first oblique crease 240, and the intersection point formed by the intersection of the second bottom edge crease 222b and the other side edge crease 221 is the second fixed end M2 of the second oblique crease 250.
Two top edge folds 223 are each located between two second edges 202 and are located on both sides of the first bottom edge fold 222a and the second bottom edge fold 222 b. Two top edge folds 223 are located at opposite ends of the side film P1a and the side film P1b, respectively, wherein one top edge fold 223 is connected between the side film P1a and one top film P4, and the other top edge fold 223 is connected between the side film P1b and one top film P4. The two top edge folds 223 are the inner edges of the two top film portions S4, respectively. In this embodiment, two top edge folds 223 each extend along the Y-axis direction and each extend from one first edge 201 to the other first edge 201.
The side edge crease 221, the first bottom edge crease 222a, the second bottom edge crease 222b, and the first edge 201 define a bottom package portion P10 of the bottom package portions P10 of the side film P1. The first bottom edge crease 222a, the first diagonal crease 240, the side surface of the first kerf slot 203a facing the second kerf slot 204a, and the first edge 201 define a first conforming portion P31 in the foundation bag portion P10. First diagonal fold 240, side edge fold 221, top edge fold 223, and first edge 201 define a first side flap portion P33 of first side pocket P30 of side film P1. The first bottom edge crease 222a, the second diagonal crease 250, and the side surface of the second kerf slot 204a facing the first kerf slot 203a, and the first edge 201 define a second conforming portion P51 in the foundation bag portion P10. The second diagonal fold 250, the side edge fold 221, the top edge fold 223, and the first edge 201 define a second side flap portion P53 of the second side pocket P50 of the side film P1. The two side folds 221, the first bottom fold 222a, and the second bottom fold 222b define a bottom film P2. Two side edge folds 221, a first bottom edge fold 222a, and a top edge fold 223 define a first panel P3a, and two side edge folds 221, a second bottom edge fold 222b, and a top edge fold 223 define a second panel P3b. The two top edge folds 223, the two first edges 201, and the two second edges 202 define two top films P4, respectively.
Referring to fig. 3, fig. 7 and fig. 8 in combination, fig. 8 is a schematic cross-sectional structure of the energy storage device 1 shown in fig. 2. Fig. 8 (a) shows a schematic cross-sectional structure of the energy storage device 1 at A-A, fig. 8 (a) shows a schematic cross-sectional structure of the energy storage device 1 at B-B, and fig. 8 (a) shows a schematic cross-sectional structure of the energy storage device 1 at C-C.
In the energy storage device 1, each of the second films 210 is adhered between one side plate 110 of the casing 101 and one side film P1 of the first film 220, respectively. In each second film 210, the first film portion 10 is disposed between the side plate 110 and the bottom package portion P10 of the side film P1 of the first film 220, and a surface of the first film portion 10 facing away from the side plate 110 is adhered to a surface of the bottom package portion P10 facing the side plate 110. Specifically, the surface of the first film portion 10 provided with the first adhesive layer Q1 is adhered to the adhesive layer of the bottom package portion P10 facing the side plate 110 in the one side film P1 of the first film 220. At this time, the surface of the first film portion 10 where the first adhesive layer Q1 is not provided faces the side plate 110, i.e., the surface of the first film portion 10 facing the side plate 110 has no adhesiveness, so that the second film 210 is more easily peeled off from the side plate 110. The second film portion 30 protrudes in the negative Y-axis direction with respect to the outer edge of the bottom package portion P10, and the surface of the second film portion 30 provided with the second adhesive layer Q2 is adhered to the outer surface of the side plate 110. Specifically, the surface of the second film portion 30 provided with the second adhesive layer Q2 faces the side plate 110, is adhered to the outer surface of the side plate 110, and partially covers the opening of the groove 115, i.e., the second film portion 30 at least partially covers the groove 115 in the width direction of the groove 115. In the present embodiment, the width of the orthographic projection of the second film portion 30 on the side plate 110 is L, and L is substantially equal to the width H of the second film portion 30. The width D < L of the groove 115, that is, the second film portion 30 exceeds the edge of the opening of the groove 115 in the X-axis width direction of the groove 115.
In the first film 220, two side films P1 respectively cover the outer surfaces of the side plates 110, and cover the second film 210, two bottom films P2 respectively cover the outer surfaces of the bottom plates 120, first and second films P3a and P3b respectively cover the outer surfaces of the two panels 130, and two top films P4 respectively cover the outer peripheral edges of the top surfaces of the top covers 140.
Specifically, in each side film P1, the surface of the bottom package P10 provided with the glue layer is attached to the outer surface of the side plate 110 and the surface of the first film portion 10 of the second film 210 facing away from the side plate 110. The width of the front projection of the bottom package P10 on the side plate 110 along the length direction of the side plate 110 is W2, that is, the width of the front projection of the bottom package P10 on the side plate 110 along the Z-axis direction is W2. W2=width W1 of the bottom package P10, i.e., the width of the bottom package P10 is equal to the width of the side panel 110 covered by the bottom package P10, i.e., the bottom package P10 can be leveled and adhered to the outer surface of the side panel 110 by the second film 210. It will be appreciated that in some embodiments, since the corner of the energy storage device 1 is the R-angle, the area of the film applied by the corner outer envelope 200 is slightly larger than the area of the film applied by the corner of the right angle type, and there is a margin, so the width W2 of the side plate 110 of the energy storage device 1 covered by the bottom package P10 is slightly smaller than the width W1 of the bottom package P10, and for example, W1-W2=0.2 mm to 1mm, and at this time, W1 and W2 can be considered to be approximately equal.
The first attaching portion P31 of the first side wrapping portion P30 is folded relative to the bottom wrapping portion P10, and a surface of the first attaching portion P31, which is not provided with the glue layer, is attached to a portion of the surface of the bottom wrapping portion P10, which is away from the side plate 110, and is not provided with the glue layer. The first side attaching portion P33 is folded relative to the first attaching portion P31, and the surface of the first side attaching portion P33 provided with the glue layer is laminated and attached to the surface of the first attaching portion P31 provided with the glue layer, the surface of the portion of the bottom wrapping portion P10 facing away from the side plate 110 and not provided with the glue layer, and the surface of the laminated and attached side plate 110, and a part of the first notch 203a is exposed.
In the second side wrapping portion P50, the second attaching portion P51 is folded relative to the bottom wrapping portion P10, and a surface of the second attaching portion P51, which is not provided with the glue layer, is laminated and attached to a portion of the surface of the bottom wrapping portion P10, which is away from the side plate 110, which is not provided with the glue layer. The second side attaching portion P53 is folded relative to the second attaching portion P51, and a surface of the second side attaching portion P53, on which the glue layer is provided, is laminated and attached to a surface of the second attaching portion P51, a portion of a surface of the bottom wrapping portion P10, which is away from the side plate 110 and is not provided with the glue layer, an outer surface of the side plate 110, and a surface of the first side attaching portion P33, which is away from the side plate 110 and is not provided with the glue layer, and a portion of the second notch 204a is exposed. The surface of the portion of the bottom package P10 facing away from the side plate 110, where the glue layer is not provided, is exposed.
Referring to fig. 7, fig. 9, and fig. 10 in combination, fig. 9 is a schematic view illustrating a part of a flow of assembling the casing 101 and the outer envelope 200 in the energy storage device 1 shown in fig. 2, and fig. 10 is a schematic view illustrating another part of a flow of assembling the casing 101 and the outer envelope 200 in the energy storage device 1 shown in fig. 2.
In assembling the energy storage device 1, the bottom plate 120 of the casing 101 is placed on the bottom film P2 of the first film 220 in the outer envelope 200, and the glue layer of the first film 220 faces the casing 101. Two edges of the bottom plate 120 extending along the X-axis direction are placed corresponding to the two side edge folds 221, and two edges of the bottom plate 120 along the Y-axis direction are placed corresponding to the two bottom edge folds 222, so as to realize that the bottom film P2 covers the outer surface of the bottom plate 120. The first film 220 is folded along the two bottom edge folds 222 toward the case 101, respectively, so that the first and second panels P3a and P3b are adhered to and cover the outer surfaces of the two panels 130, respectively. At this time, two side edge folds 221 are placed corresponding to edges of the side plate 110 extending in the Z-axis direction, and two top edge folds 223 are placed corresponding to outer circumferential edges of the top surface of the top cover 140.
The first adhesive layer Q1 of the first film portion 10 of the two second films 210 in the outer envelope 200 is adhered to the adhesive layer of the bottom package P10 of the two side films P1 of the first film 220 to bond the first film portion 10 to the adhesive layer of the bottom package P10, thereby bonding the first film portion 10 of the two second films 210 to the first film 220. At this time, the second film portion 30 of the second film 210 protrudes with respect to the outer edge of the bottom package portion P10 of the second film 210, and the second adhesive layer Q2 of the second film portion 30 faces away from the bottom package portion P10.
The second film portion 30 of the second film 210 is lifted up, the second film portion 30 is aligned with the groove 115 of the side plate 110, and the second adhesive layer Q2 of the second film portion 30 facing the side plate 110 is adhered to the outer surface of the side plate 110 and partially covers the opening of the groove 115. At this time, the surface of the first film portion 10 provided with the first adhesive layer Q1 faces away from the side plate 110 and is adhered to the adhesive layer of the bottom package portion P10. The surface of the first film portion 10 on which the first adhesive layer Q1 is not provided faces the side plate 110, and the surface of the second film portion 30 on which the second adhesive layer Q2 is not provided faces away from the side plate 110. The second film portion 30 drives the bottom package portion P10 of the first film 220 to fold along the side edge crease 221 towards the side panel 110, so that the bottom package portion P10 adheres to and covers the outer surface of the end portion of the side panel 110 towards the bottom panel 120, and the bottom package portion P10 partially covers the opening of the groove 115 of the side panel 110. Meanwhile, the first attaching portion P31 is folded along the first oblique crease 240, so that the glue layer of the first attaching portion P31 in the first side wrapping portion P30 is adhered to the glue layer of the first side attaching portion P33, and the surface of the first attaching portion P31 facing away from the first side attaching portion P33 has no glue layer. The second attaching portion P51 is folded along the second oblique crease 250, so that the glue layer of the second attaching portion P51 in the second side wrapping portion P50 is adhered to the glue layer of the second side attaching portion P53, and the surface of the second attaching portion P51 facing away from the second side attaching portion P53 has no glue layer.
The first side attaching portion P33 of the first side package P30 of the first film 220 is folded along the side edge crease 221, and the first attaching portion P31 adhered to the first side attaching portion P33 is folded, so that the first side attaching portion P33 covers and adheres to the outer surface of the side plate 110 and the second film portion 30 at least partially covers the second film 210. At this time, the first attaching portion P31 is located between the bottom package P10 and the first side package P30, and since the surface of the first attaching portion P31 facing away from the first side package P30 has no glue layer, i.e. the surface of the first attaching portion P31 facing toward the bottom package P10 has no glue layer, when the first side package P30 is askew or misattached, the operator can lift the first film 220 from the first attaching portion P31 without adhesion, so as to re-correct the film attaching position.
The second side attaching portion P53 of the second side wrapping portion P50 of the first film 220 is folded along the side edge crease 221, and the second attaching portion P51 adhered to the second side attaching portion P53 is folded, so that the second side attaching portion P53 covers and adheres to the outer surface of the side plate 110, a portion of the second film portion 30 of the second film 210, and the outer surface of the first side attaching portion P33 facing away from the side plate 110. At this time, the second attaching portion P51 is located between the bottom package portion P10 and the second side attaching portion P53, and since the surface of the second attaching portion P51 facing away from the second side attaching portion P53 has no adhesive layer, i.e. the surface of the second attaching portion P51 facing toward the bottom package portion P10 has no adhesive layer, when the second side package portion P50 is askew or misattached, the operator can lift the first film 220 from the non-adhesive second attaching portion P51 to re-correct the film attaching position.
By alternately covering the first side wrap P30 and the second side wrap P50 in the first film 220, it is achieved that the side film P1 of the first film 220 can completely cover the outer surface of the side plate 110. It is to be understood that in other embodiments, the second side wrapping portion P50 may be folded first and then the first side wrapping portion P30 may be folded, and the folding sequence of the first side wrapping portion P30 and the second side wrapping portion P50 is not limited in the present application.
The top film P4 of the first film 220 is then folded along the two top edge folds 223 toward the case 101 such that a portion of the top film P4 covers the outer peripheral surface of the top cover 140. Finally, the top patch 102 is mounted on the top surface of the top cover 140 facing away from the side plate 110, so that the top patch 102 is attached to the top surface of the top cover 140 facing away from the side plate 110, and two top films P4 are covered, so that the energy storage device 1 is prepared and formed.
In addition, the first diagonal fold 240 and the second diagonal fold 250 are generally formed by a flanging device, and standard folds are generally preset when the actual folds of the first diagonal fold 240 and the second diagonal fold 250 are formed. Since the first free ends N1 of the actual creases of the first diagonal crease 240 and the second free ends N2 of the actual creases of the second diagonal crease 250 may be offset from the standard creases when the crease is actually made, a problem of creasing when the side film P1 wraps the side panel 110 of the case 101 due to the offset of the actual creases of the first diagonal crease 240 and the second diagonal crease 250 is easily caused. According to the energy storage device 1 provided by the application, the first notch groove 203a and the second notch groove 204a are arranged on the side film P1, and meanwhile, the over-cutting amount of the first notch groove 203a compared with the first inclined crease 240 and the over-cutting amount of the second notch groove 204a compared with the second inclined crease 250 are controlled, so that the problem of wrinkling in the wrapping process is avoided, the consistency of the energy storage device 1 is improved, the service life of electronic equipment is prolonged, and meanwhile, the side film P1 is convenient to fold.
During the folding process along the first diagonal fold 240 and the second diagonal fold 250, the over-cut of the first notch 203a compared to the first diagonal fold 240 and the over-cut of the second notch 204a compared to the second diagonal fold 250 are not controllable, which may cause the problem of wrinkles and bubbles when the side film P1 covers the side panel 110 due to the inconsistent folding positions of the first diagonal fold 240 and the second diagonal fold 250. According to the application, the second film 210 is used for bonding the side film P1 of the first film 220, and the second film 210 is lifted up to drive the middle sole package part P10 of the side film P1 to be bonded with the outer surface of the side plate 110, and meanwhile, the middle sole package part P10 of the side film P1 can be leveled by using the second film 210, so that the flatness of the sole package part P10 for coating the side plate 110 can be ensured. When the problem of wrinkling or air bubbles and the like occurs due to the dislocation of the bonding positions of the bottom packaging part P10 and the side plate 110, the second film 210 can be pulled to separate the bottom packaging part P10 from the side plate 110, so that the adjustment of the packaging position of the bottom packaging part P10 on the side plate 110 is realized, the flatness of the bottom packaging part P10 coating the side plate 110 is further ensured, the uniformity of the energy storage device 1 is improved, and the service life of electronic equipment is prolonged.
In addition, the groove 115 is arranged on the side plate 110, and when the second film part 30 of the second film 210 is lifted, the second film part 30 can be guided to be aligned with the groove 115 of the side plate 110, so that the position of the second film part 30 on the side plate 110 is positioned, the bonding position of the bottom package part P10 bonded with the first film part 10 on the side plate 110 is further ensured not to be misplaced, and the problem that the bottom package part P10 is wrinkled in the wrapping process is further avoided. In this embodiment, the groove 115 may be preset at a middle position of the side plate 110 in the width direction when the housing 101 is processed, and the second film 210 may be preset at a middle position of the side film P1 of the first film 220 by a machine, so as to ensure that the bonding position of the bottom package P10 on the side plate 110 is not dislocated after the groove 115 is aligned with and bonded to the bottom package P10 of the second film 210. It will be appreciated that in other embodiments, the predetermined position of the groove 115 on the side plate 110 and the predetermined position of the second film 210 on the first film 220 may be other positions that can achieve adhesion of the pull bottom package P10 to the outer surface of the side plate 110.
In addition, in the embodiment, by controlling the width D of the groove 115 to be smaller than the width L of the orthographic projection of the second film portion 30 on the side plate 110, the second film portion 30 can extend beyond the groove 115 along the width direction of the groove 115, the second film portion 30 partially covers the opening of the groove 115, and the portion of the second film portion 30 above the groove 115 is suspended. On the one hand, when the second film portion 30 is adhered to the outer surface of the side plate 110, the bottom package portion P10 is not easily wrinkled, thereby facilitating the coating of the outer envelope 200. On the other hand, when the bonding position of the bottom package P10 and the side plate 110 is dislocated, the bottom package P10 is easily lifted from the side plate 110 by lifting the suspended portion of the second film 210 above the groove 115, so as to facilitate adjustment of the attaching position of the bottom package P10 on the side plate 110, thereby facilitating correction of the attaching position of the bottom package P10 when the bottom package P10 is attached askew, and further ensuring that wrinkles are not easy to occur when the first film 220 covers the casing 101. In this embodiment, D/l=0.7 to 0.8. Too small a ratio of D/L may cause excessive adhesion of the material of the second adhesive layer Q2 of the second film portion 30 to the outer surface of the side plate 110 located on opposite sides of the groove 115 in the X-axis direction, and when the second film portion 30 is misaligned in the groove 115 to cause the second film portion 30 to be distorted on the outer surface of the side plate 110, correction is inconvenient. An excessively large D/L ratio may cause the edges of the second film portion 30 in the X-axis width direction to be not reliably adhered to the outer surfaces of the side plates 110 on the opposite sides of the groove 115 in the X-axis direction.
The embodiment of the application also provides electronic equipment, which is provided with the energy storage device 1, wherein the energy storage device 1 is used for providing power for the electronic equipment. The electronic device may include a vehicle, an electronic device, or an unmanned aerial vehicle. The electronic equipment comprises a notebook, a tablet, a mobile phone and the like.
Referring to fig. 11, fig. 11 is a schematic side view of a second film 210 of an outer envelope 200 in an energy storage device 1 according to a second embodiment of the present application.
The second film 210 of the outer envelope 200 of the energy storage device 1 in the second embodiment has the same structure as the second film 210 of the first embodiment, except that in the second embodiment, the first film portion 10 of the second film 210 is further provided with a third adhesive layer Q3, and the third adhesive layer Q3 is adhered to the second surface 211b of the first body portion R1.
Specifically, in the energy storage device 1, the first adhesive layer Q1 of the first film portion 10 in the second film 210 faces away from the side plate 110 and is adhered to the adhesive layer of the bottom package portion P10 facing the side plate 110. The third adhesive layer Q3 of the first film portion 10 faces the side plate 110 and is adhered to the outer surface of the side plate 110.
The above disclosure is illustrative of the preferred embodiments of the present application and, of course, should not be taken as limiting the scope of the application, and those skilled in the art will recognize that all or part of the process for practicing the embodiments described herein can be practiced with equivalent arrangements which are within the purview of the present application.
Claims (12)
1. The utility model provides an energy storage device, its characterized in that includes shell and outer envelope, the shell includes bottom plate, two panels that set up relatively and two curb plates that set up relatively, two the panel and two curb plates are all fixed connection in the same side of bottom plate, two the curb plate is all fixed connection between two the panel, outer envelope includes a first membrane,
the first film comprises a body and a gluing layer covered on one side surface of the body, the first film comprises a bottom film, two face masks and two side films, the bottom film is used for covering the outer surface of the bottom plate, the two face masks are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the two panels, and the two side films are respectively used for covering the outer surfaces of the two side plates; each side film comprises a bottom wrapping part, a first side wrapping part and a second side wrapping part, wherein the first side wrapping part and the second side wrapping part are connected to the opposite sides of the bottom wrapping part, the bottom wrapping parts of the two side films are connected to the opposite sides of the bottom film, the first side wrapping parts of the two side films are connected to the opposite sides of one mask, and the second side wrapping parts of the two side films are connected to the opposite sides of the other mask;
Each side film is provided with a first notch groove and a second notch groove which is arranged at intervals with the first notch groove; the first notch groove is formed in the first side wrapping portion, penetrates through the first side wrapping portion in the thickness direction of the first side wrapping portion and penetrates through the outer edge of the first side wrapping portion, and the bottom surface of the first notch groove is arranged at intervals with the inner edge of the first side wrapping portion; the second notch groove is formed in the second side wrapping portion, penetrates through the second side wrapping portion in the thickness direction of the second side wrapping portion and penetrates through the outer edge of the second side wrapping portion, and the bottom surface of the second notch groove is arranged at intervals with the inner edge of the second side wrapping portion;
the depth extending from the opening of the first incision groove to the bottom surface of the first incision groove is Z1, and the depth extending from the opening of the second incision groove to the bottom surface of the second incision groove is Z2, and is more than or equal to 0 and less than or equal to |Z2-Z1| and less than or equal to 1mm; the distance between the side surface of the first notch groove facing the bottom wrapping part and the edge of the bottom wrapping part facing the first notch groove is h1, the distance between the side surface of the second notch groove facing the bottom wrapping part and the edge of the bottom wrapping part facing the second notch groove is h2, and the distance is more than or equal to 0 and less than or equal to |h1-h2| and less than or equal to 1mm;
The width of the first side wrapping part is W3, Z1/W3 is more than or equal to 45% and less than or equal to 65%, h1/W3 is more than or equal to 0.4 and less than or equal to 0.7, the first side wrapping part comprises a first attaching part and a first side attaching part, the first attaching part is connected between the side surface of the first notch groove, which faces the bottom wrapping part, and the first side attaching part is connected with the first attaching part; the width of the second side wrapping part is W4, Z2/W4 is more than or equal to 45% and less than or equal to 65%, h2/W4 is more than or equal to 0.4 and less than or equal to 0.7, the second side wrapping part comprises a second attaching part and a second side attaching part, the second attaching part is connected between the side surface of the second notch groove, which faces the bottom wrapping part, and the second side attaching part is connected with the second attaching part;
each side film is provided with a first inclined crease and a second inclined crease, the first inclined crease comprises a first fixed end and a first free end, the first fixed end is an intersection point of the side film, one mask and the bottom film, the first free end and the side surface of the first incision groove, which faces the second incision groove, are intersected, and the distance between the first free end and the bottom surface of the first incision groove is H1, and H1 is larger than 0; the second inclined crease comprises a second fixed end and a second free end, the second fixed end is an intersection point of the side film, the other mask and the bottom film, the second free end and the side surface of the second incision groove, which faces the first incision groove, are intersected, the distance between the second free end and the bottom surface of the second incision groove is H2, and H2 is larger than 0;
The first oblique crease is connected between the first side attaching part and the first attaching part, and the second oblique crease is connected between the second side attaching part and the second attaching part;
the surface of the first side attaching part is provided with a rubberizing layer and is laminated on one surface of the first attaching part, the surface of the bottom attaching part is away from the side plate and is not provided with the rubberizing layer, and the surface of the first attaching part is laminated on the outer surface of the side plate and exposes a part of the first incision groove;
in the second side wrapping portion, the second attaching portion is folded relative to the bottom wrapping portion, a surface of the second attaching portion, which is not provided with a glue layer, is laminated and attached to a part of the surface of the bottom wrapping portion, which is away from the side plate, which is not provided with the glue layer, the second side attaching portion is folded relative to the second attaching portion, a surface of the second side attaching portion, which is provided with the glue layer, is laminated and attached to a surface of the second attaching portion, which is away from the side plate, which is not provided with the glue layer, a part of the surface of the bottom wrapping portion, which is away from the side plate, which is not provided with the glue layer, and an outer surface of the side plate, which is laminated and attached to a part of the surface of the first side attaching portion, which is away from the side plate, which is not provided with the glue layer, are exposed;
The surface of the part of the bottom wrapping part, which is away from the side plate and is not provided with the rubberized layer, is exposed.
2. The energy storage device of claim 1, wherein the outer wrap film further comprises two second films, each of the second films comprising a first film portion and a second film portion connected to the first film portion, the first film portion comprising a surface facing away from the side plate provided with a first adhesive layer and another surface facing the side plate not provided with a first adhesive layer, the first film portion being disposed between the side plate and the bottom wrap portion and provided with a surface of the first adhesive layer being adhered to a surface of the bottom wrap portion facing the side plate provided with a glue layer, the second film portion comprising a surface of the side plate provided with a second adhesive layer facing the outer edge of the bottom wrap portion, the second film portion protruding with respect to the outer edge of the bottom wrap portion and provided with a surface of the second adhesive layer being adhered to the outer surface of the side plate.
3. The energy storage device according to claim 2, wherein the side plate is provided with a groove, an opening of the groove is formed in an outer surface of the side plate, the groove is recessed from the outer surface of the side plate toward an inner side of the housing and penetrates through the side plate toward an end surface of the bottom plate, and the second film portion is bonded to the outer surface of the side plate toward a surface of the side plate provided with the second adhesive layer and partially covers the opening of the groove.
4. The energy storage device of claim 3, wherein the width of the groove is D, and the width of the orthographic projection of the second film portion on the side plate is L, D < L.
5. The energy storage device of claim 4, wherein D < L = 0.7-0.8.
6. The energy storage device of any of claims 2 to 5, wherein the width of the bottom wrap portion is W1, and the width of the orthographic projection of the bottom wrap portion on the side plates is W2, w2=w1.
7. The outer wrapping film comprises a body and a glue coating layer coated on the body, and is used for attaching a shell of an energy storage device, and is characterized in that the shell comprises a bottom plate, two oppositely arranged panels and two oppositely arranged side plates, the two panels and the two side plates are fixedly connected to the same side of the bottom plate, the two side plates are fixedly connected between the two panels, and the outer wrapping film comprises a first film;
the first film comprises a bottom film, two face films and two side films, wherein the bottom film is used for covering the outer surface of the bottom plate, the two face films are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the two panels, and the two side films are positioned on two opposite sides of the bottom film and are respectively used for covering the outer surfaces of the side plates;
Each side film comprises a bottom wrapping part, a first side wrapping part and a second side wrapping part, wherein the first side wrapping part and the second side wrapping part are connected to the opposite sides of the bottom wrapping part, the bottom wrapping parts of the two side films are connected to the opposite sides of the bottom film, the first side wrapping parts of the two side films are connected to the opposite sides of one mask, and the second side wrapping parts of the two side films are connected to the opposite sides of the other mask;
each side film is provided with a first notch groove and a second notch groove which is arranged at intervals with the first notch groove, the first notch groove is arranged on the first side wrapping part, the first notch groove penetrates through the first side wrapping part along the thickness direction of the first side wrapping part and penetrates through the outer edge of the first side wrapping part, and the bottom surface of the first notch groove and the inner edge of the first side wrapping part are arranged at intervals; the second notch groove is arranged on the second side wrapping part and is positioned on two opposite sides of the bottom film from the first notch groove, the second notch groove penetrates through the second side wrapping part along the thickness direction of the second side wrapping part and penetrates through the outer edge of the second side wrapping part, and the bottom surface of the second notch groove is arranged at intervals with the inner edge of the second side wrapping part;
The depth extending from the opening of the first incision groove to the bottom surface of the first incision groove is Z1, and the depth extending from the opening of the second incision groove to the bottom surface of the second incision groove is Z2, and is more than or equal to 0 and less than or equal to |Z2-Z1| and less than or equal to 1mm; the distance between the side surface of the first notch groove facing the bottom wrapping part and the edge of the bottom wrapping part facing the first notch groove is h1, the distance between the side surface of the second notch groove facing the bottom wrapping part and the edge of the bottom wrapping part facing the second notch groove is h2, and the distance is more than or equal to 0 and less than or equal to |h1-h2| and less than or equal to 1mm;
the width of the first side wrapping part is W3, Z1/W3 is more than or equal to 45% and less than or equal to 65%, h1/W3 is more than or equal to 0.4 and less than or equal to 0.7, the first side wrapping part comprises a first attaching part and a first side attaching part, the first attaching part is connected between the side surface of the first notch groove, which faces the bottom wrapping part, and the first side attaching part is connected with the first attaching part; the width of the second side wrapping part is W4, Z2/W4 is more than or equal to 45% and less than or equal to 65%, h2/W4 is more than or equal to 0.4 and less than or equal to 0.7, the second side wrapping part comprises a second attaching part and a second side attaching part, the second attaching part is connected between the side surface of the second notch groove, which faces the bottom wrapping part, and the second side attaching part is connected with the second attaching part; each side film is provided with a first inclined crease and a second inclined crease, the first inclined crease comprises a first fixed end and a first free end, the first fixed end is an intersection point of the side film, one mask and the bottom film, the first free end and the side surface of the first incision groove, which faces the second incision groove, are intersected, and the distance between the first free end and the bottom surface of the first incision groove is H1, and H1 is larger than 0; the second inclined crease comprises a second fixed end and a second free end, the second fixed end is an intersection point of the side film, the other mask and the bottom film, the second free end and the side surface of the second incision groove, which faces the first incision groove, are intersected, the distance between the second free end and the bottom surface of the second incision groove is H2, and H2 is larger than 0;
The first oblique crease is connected between the first side attaching part and the first attaching part, and the second oblique crease is connected between the second side attaching part and the second attaching part;
the surface of the first side attaching part is provided with a rubberized layer, is used for laminating and attaching to a surface of the first attaching part, a part surface of the bottom wrapping part, which is not provided with the rubberized layer, and is used for laminating and attaching to the outer surface of the side plate, and is used for exposing part of the first notch groove;
in the second side wrapping portion, the second attaching portion can be folded relative to the bottom wrapping portion, a surface of the second attaching portion, which is not provided with a glue layer, is used for laminating and attaching to a portion surface, which is away from the side plate, of the bottom wrapping portion, which is not provided with the glue layer, the second side attaching portion can be folded relative to the second attaching portion, a surface, which is provided with the glue layer, of the second side attaching portion is used for laminating and attaching to a surface, which is away from the second attaching portion, of the second attaching portion, which is provided with the glue layer, a portion surface, which is away from the side plate, which is not provided with the glue layer, of the bottom wrapping portion, an outer surface of the side plate, and a surface, which is away from the side plate, which is not provided with the glue layer, of the first side attaching portion, which is used for laminating and attaching to the first side attaching portion, which is away from the side plate, and is used for exposing the second notch;
The surface of the part of the bottom wrapping part, which is away from the side plate and is not provided with the rubberized layer, can be exposed.
8. The outer envelope of claim 7, wherein the outer envelope further comprises two second films, each of the second films comprising a first film portion and a second film portion connected to the first film portion, the first film portion comprising a surface provided with a first adhesive layer and another surface not provided with a first adhesive layer, and being provided with the first adhesive layer adhered to the adhesive layer of the base, the second film portion being convex with respect to an outer edge of the base, and a surface of the second film portion facing away from the base being provided with a second adhesive layer.
9. The outer envelope of claim 7, wherein H1 is 0.3mm to 0.6mm.
10. The outer envelope of claim 7, wherein H2 is 0.3mm to 0.6mm.
11. The outer envelope of claim 7, wherein h1=h2.
12. An electronic device having an energy storage device as claimed in any one of claims 1 to 6, said energy storage device powering said electronic device.
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| CN202311032224.6A CN116742222B (en) | 2023-08-16 | 2023-08-16 | Energy storage device, outer envelope and electronic equipment |
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| CN202311032224.6A CN116742222B (en) | 2023-08-16 | 2023-08-16 | Energy storage device, outer envelope and electronic equipment |
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| CN116742222A CN116742222A (en) | 2023-09-12 |
| CN116742222B true CN116742222B (en) | 2023-10-13 |
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| CN116365147A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | Energy storage battery, energy storage device and electric equipment |
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| CN218677337U (en) * | 2022-11-30 | 2023-03-21 | 蜂巢能源科技股份有限公司 | Packaging film and battery |
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| CN116742222A (en) | 2023-09-12 |
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