CN116706457A - Battery coating film, secondary battery and electric equipment - Google Patents
Battery coating film, secondary battery and electric equipment Download PDFInfo
- Publication number
- CN116706457A CN116706457A CN202310981096.3A CN202310981096A CN116706457A CN 116706457 A CN116706457 A CN 116706457A CN 202310981096 A CN202310981096 A CN 202310981096A CN 116706457 A CN116706457 A CN 116706457A
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- coating film
- battery
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- 239000011248 coating agent Substances 0.000 title claims abstract description 171
- 238000000576 coating method Methods 0.000 title claims abstract description 171
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 239000010408 film Substances 0.000 claims 13
- 239000013039 cover film Substances 0.000 claims 5
- 238000011084 recovery Methods 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 10
- 238000003912 environmental pollution Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 16
- 230000000977 initiatory effect Effects 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920006257 Heat-shrinkable film Polymers 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a battery coating film, a secondary battery and electric equipment, wherein the battery coating film is provided with two pre-cut lines which are arranged at intervals, so that the battery coating film is provided with a tearing part positioned between the two pre-cut lines; the battery coating film is also provided with a plurality of gaps which are arranged at intervals along the extending direction of at least one precut line, the gaps comprise a first sub-gap and a second sub-gap which are respectively positioned at two sides of the precut line, and the second sub-gap is positioned at the tearing part. The battery coating film, the secondary battery and the electric equipment provided by the embodiment of the invention can conveniently tear the battery coating film from the single battery, and the recovery of the battery coating film is convenient, so that the problems of environmental pollution and resource waste caused by burning the battery coating film can be solved.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a battery coating film, a secondary battery and electric equipment.
Background
The secondary battery (Rechargeable battery) is also called a rechargeable battery or a storage battery, and is a battery that can be continuously used by activating an active material by charging after discharging the battery. The recyclable characteristic of the secondary battery gradually becomes a main power source of electric equipment, and the consumption of electrode materials for preparing the secondary battery is gradually increased along with the gradual increase of the use amount of the secondary battery, so that the price of raw materials is continuously increased. Therefore, efficient recovery of materials in a large number of retired secondary batteries is increasingly important in the full life cycle management of secondary batteries.
At present, the secondary battery is more concerned about improvement of the performance of the secondary battery in a production link, and the design that the subsequent secondary battery is convenient to disassemble after retirement so as to be convenient to recycle is not considered, so that when the retired secondary battery is recycled, the secondary battery is mainly recycled through steps of crushing, screening, magnetic separation, collection and the like, and materials with relatively high price such as lithium, cadmium, nickel and the like in the secondary battery are usually recycled, but materials with relatively low price or parts made of materials with relatively low price cannot be reasonably recycled, for example, parts made of plastic materials such as an outer coating are usually incinerated after crushing, so that the environment is polluted, the waste of resources is also caused, and the recycling rate of the secondary battery is relatively low.
Disclosure of Invention
The embodiment of the invention discloses a battery coating film, a secondary battery and electric equipment, which can conveniently tear the battery coating film from a single battery, and is convenient for recycling the battery coating film, so that the problems of environmental pollution and resource waste caused by incineration of the battery coating film can be solved.
In order to achieve the above object, in a first aspect, the present invention discloses a battery wrapping film provided with two precuts arranged at an interval such that the battery wrapping film has a tear portion located between the two precuts; and battery coating film still is provided with along at least one a plurality of breach that the extending direction interval of tangent line was arranged in advance, the breach is including being located first sub-breach and the second sub-breach of tangent line both sides in advance, the second sub-breach is located tear the portion of drawing, battery coating film other parts except tear the portion of drawing have enclose and form the first contour line of first sub-breach, tear the portion of drawing have enclose and form the second contour line of second sub-breach.
Through being provided with two precuts line that the interval set up on the battery coating film to make the battery coating film have the tear portion that is located between two precuts line, and still be provided with a plurality of breachs of arranging along the extending direction interval of at least one precut line on the battery coating film, in order to tear tearing portion back, can form two at least initial portions that are used for next tearing process on the battery coating film, first sub-breach and second sub-breach can be separated, and can be located the portion that two adjacent sub-breachs formed the perk in initial portion and tear the portion, this is because the battery coating film is ductile, after tearing portion, the portion that the initial portion is located two adjacent sub-breachs can break away from the surface of battery cell and lose viscidity and perk, thereby tear tearing portion earlier when separating battery coating film and battery cell, then can pinch or grasp this other parts that the battery coating film remains tear down from battery cell, make the tear of battery coating film more convenient, make things convenient for the battery coating film's the portion that is located two adjacent sub-breachs of initial portion, and can compare the waste of the film and carry out the environmental protection and can compare the waste of the film when the environmental protection is compared to the film that the waste is carried out to the film of the waste of the battery coating film.
As an alternative embodiment, in an embodiment of the first aspect of the present invention, the first contour of the first sub-notch and/or the second contour of the second sub-notch comprises at least one arc segment. So when tearing the portion of tearing, because the existence of arc section for the force of tearing can carry out stress dispersion at the arc section, prevent that horizontal tearing from being torn along with tearing the portion and being torn together, and lead to the initial part of battery coating film can't form the condition of tearing the portion of tearing, thereby ensure tearing the portion of tearing that can be located two adjacent first sub-breach in initial part and form the portion of tearing of perk, and then conveniently pinch or hold this portion of tearing and tear the remaining other parts of battery coating film from the battery cell, make the tearing of battery coating film more convenient, made things convenient for the recovery of battery coating film, and then be favorable to improving the recovery efficiency of battery coating film.
As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the first contour line of the first sub-notch and/or the second contour line of the second sub-notch includes a first arc segment, and the first arc segment is located at a middle position of the first contour line and/or the second contour line.
When tearing the tear portion after, through holding or holding the portion of tearing that plays that is located two adjacent breachs to when tearing the film process that other parts that will battery coating left from the battery of next stage tear down, this is when tearing initial part to first arc section, because the existence of first arc section, make the tearing force can carry out stress dispersion at first arc section, and can not appear transversely tearing and lead to tearing the condition of film process disconnection, in order to ensure the integrality of battery coating film tearing process, thereby make the tearing of battery coating film more convenient, make things convenient for the recovery of battery coating film, and then be favorable to improving the recovery efficiency of battery coating film. The first arc segment may be a circular arc segment or a parabolic segment.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the first sub-notch and/or the second sub-notch are stepped notches, the stepped notch includes a first notch portion and a second notch portion that are mutually communicated, the first notch portion is further away from the second sub-notch or the first sub-notch than the second notch portion in a direction perpendicular to the pre-tangent line, the first contour line and/or the second contour line includes a first sub-contour line enclosing to form the first notch portion and a second sub-contour line enclosing to form the second notch portion, and the first arc segment is located at a middle position of the first sub-contour line; the width of the first notch portion is smaller than the width of the second notch portion in the extending direction of the precut line to form a step line between the first notch portion and the second notch portion.
Through designing first sub-breach and second sub-breach as the ladder type breach that includes first breach portion and second breach portion, and make the width of the second breach portion that is close to the second sub-breach of first sub-breach be less than the width of first breach portion, make the width of the second breach portion that is close to the first sub-breach of second sub-breach be less than the width of first breach portion, thereby make the tear portion and play the width of the position that the portion passes through the precut line connection relatively less, and then tear the portion easily, make the tearing of tear portion more laborsaving, swiftly, can also ensure simultaneously to form at the initial portion and play the portion, for tearing other parts that remain with the battery coating film from the battery cell and provide the position of being pinched or held, so that the tearing of battery coating film.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, a second arc segment is disposed at a connection position between the first sub-contour line and the step line, and a third arc segment is disposed at a connection position between the second sub-contour line and the step line.
When preparing to tear initial part like this, from beginning to tear the portion and tear the battery coating film to second arc section, when the third arc section gradually, can utilize second arc section and third arc section to carry out stress dispersion to the tearing force who comes to here, and be unlikely to because this part sets up to the right angle, and appear horizontal tearing to lead to tearing the portion fracture and influence the problem of follow-up dyestripping, so that tear the portion and can be followed second arc section, third arc section and upwarp gradually, so as to pinch or hold this portion of tearing, thereby be convenient for tear the battery coating film, with retrieve the battery coating film.
As an alternative embodiment, in the example of the first aspect of the present invention, a distance between two adjacent notches is 1mm-3mm in an extending direction of the precut line. Through controlling the distance between two adjacent breach between 1mm-3 mm's scope, can ensure to play to tear the portion and tear when tearing the portion of tearing, can also ensure simultaneously to play to tear the portion and tear and can perk after tearing the portion to in order to pinch or grasp this portion of tearing, thereby be convenient for tear battery coating film, in order to retrieve battery coating film.
In an embodiment of the first aspect of the present invention, the precut line extends to a boundary line of the battery coating film, so that the connection between the periphery of the tearing portion and other portions of the battery coating film except for the tearing portion is an unstable connection, and the boundary line segment between the two precut lines can be used as a tearing position for tearing the tearing portion, so that the boundary line segment between the two precut lines can be pinched or clamped, and the whole tearing portion is torn along the extending direction of the precut line, so that the whole tearing portion is conveniently torn away from the battery coating film, and the tearing of the tearing portion is more convenient.
Or, the battery coating film is further provided with two hidden tangents which are arranged at intervals, the two hidden tangents are respectively connected between the two pre-tangent lines, and the two hidden tangents are respectively positioned at two ends of the pre-tangent line. Like this, two pre-cut lines and two hidden tangent lines can enclose and close and form closed loop structure for the periphery of tearing portion and battery coating film are all unstable connection except tearing the connection between other parts of portion, thereby be convenient for tear whole tearing portion and leave battery coating film, make tearing portion tear more convenient.
As an alternative embodiment, in the embodiment of the first aspect of the present invention, the battery wrapping film is further provided with a tear line, and an extending direction of the tear line and an extending direction of the precut line are disposed at an angle. Therefore, the battery coating film can be provided with a plurality of starting tearing points, so that the battery coating film is convenient to tear, and when the battery coating film is torn, the battery coating film can be torn down quickly along the easy-to-tear line, and the tearing and recycling efficiency of the battery coating film is effectively improved. In addition, the design of a plurality of starting tearing points is also convenient for tearing films in the next process by utilizing the starting part of the starting tearing points even if faults occur in the film tearing process.
In a second aspect, the present invention discloses a secondary battery, where the secondary battery includes a single battery and the battery coating film according to the first aspect, and the battery coating film coats the outer surface of the single battery. The secondary battery with the battery coating film according to the first aspect can also be used for conveniently tearing the battery coating film from the single battery, so that the battery coating film can be conveniently recovered, and the problems of environmental pollution and resource waste caused by incineration of the battery coating film can be solved.
As an alternative embodiment, in an example of the second aspect of the present invention, the unit cell includes a peripheral wall, a bottom side wall and a top side wall, the bottom side wall is connected to one end of the peripheral wall, and the top side wall is connected to the other end of the peripheral wall and is disposed opposite to the top side wall; the battery coating film comprises a first part coated on the peripheral wall, a second part coated on the bottom side wall and a third part coated on the top side wall, wherein the first part, the second part and the third part are all provided with the tearing part.
Like this, battery coating film can all be equipped with the portion of tearing on a plurality of faces such as side, top surface and bottom surface of battery cell to make battery coating film correspond the part of every face of battery cell all can be after tearing the portion of tearing, form two at least initial portions that are used for next tearing process, so that tear remaining part to battery coating film on every face of battery cell, can improve battery coating film's dyestripping efficiency greatly.
In a third aspect, the invention discloses an electric device, which is provided with the secondary battery according to the second aspect. The electric equipment with the secondary battery according to the second aspect has the beneficial effects of the battery coating film according to the first aspect, so that the electric equipment disclosed by the third aspect of the invention can also tear the battery coating film from the single battery more conveniently, and the recovery of the battery coating film is facilitated, so that the problems of environmental pollution and resource waste caused by burning the battery coating film can be solved.
Compared with the prior art, the invention has the beneficial effects that:
according to the battery coating film, the secondary battery and the electric equipment, the two precuts are arranged at intervals on the battery coating film, so that the battery coating film is provided with the tearing parts between the two precuts, and the battery coating film is also provided with the plurality of notches which are arranged at intervals along the extending direction of at least one precut, so that after the tearing parts are torn, at least two initial parts for the next tearing process are formed on the battery coating film, the first sub notch and the second sub notch can be separated, and the part of the initial part, which is positioned on the adjacent two first sub notches, forms the raised tearing parts, because the battery coating film is ductile, after the tearing parts are torn, the part, which is positioned on the adjacent two first sub notches, of the initial part is separated from the surface of a single battery and loses viscosity so as to be raised, when the battery coating film and the single battery are separated, then the tearing parts can be torn or clamped, the rest parts of the battery coating film can be taken down from the single battery, the battery coating film can be conveniently broken, the problem of the secondary battery can be solved, the environmental pollution can be solved, the secondary battery coating film can be conveniently recovered, and the environmental pollution can be caused, and the secondary battery coating film can be conveniently recovered, and the environmental pollution can be conveniently is avoided when the film is coated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing a first structure of a battery coating film according to an embodiment of the present invention;
fig. 2 is a schematic view showing a second structure of a battery coating film according to an embodiment of the present invention;
fig. 3 is a schematic view of a third structure of a battery coating film according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the battery wrapping film of FIG. 3 after tearing the tear portion;
FIG. 5 is a partial enlarged view at M in FIG. 4;
fig. 6 is a schematic view of a fourth structure of a battery coating film according to an embodiment of the present invention;
FIG. 7 is a partial enlarged view at N in FIG. 6;
fig. 8 is a schematic view of a fifth structure of a battery coating film according to an embodiment of the present invention;
fig. 9 is a schematic structural view of a secondary battery according to an embodiment of the present invention.
Description of the main reference numerals
100-a secondary battery;
10-a battery coating film; 10 a-a first part; 10 b-a second part; 10 c-a third part; 11-precutting line; 12-a tear-off portion; 13 a-notch; 13 b-tear-off portion; 131-a first sub-notch; 132-a second sub-notch; 1311-a first notch portion; 1312-a second notched portion; 1313-step line; 133-a first contour; 133 a-a first sub-contour; 133 b-a second sub-contour; 1331-a first arc segment; 1332-a second arc segment; 1333-third arc segment; 134-a second contour; 14-boundary line; 15-hidden tangent line; 16-an easy-to-tear line;
20-single battery; 21-an outer peripheral wall; 22-bottom sidewalls; 23-top side wall.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
The technical scheme of the invention will be further described with reference to the examples and the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the invention discloses a battery coating film, which can be used for coating the outer surface of a single battery to play an insulating role. Specifically, the battery wrapping film 10 is provided with two precut lines 11 arranged at intervals so that the battery wrapping film 10 has a tear portion 12 located between the two precut lines 11; the battery coating film 10 is further provided with a plurality of notches 13a arranged at intervals along the extending direction of at least one precut line 11, that is, as shown in fig. 1, the battery coating film 10 may be provided with a plurality of notches 13a arranged at intervals along the extending direction of one precut line 11, or, as shown in fig. 2 and 3, the battery coating film 10 may be provided with a plurality of notches 13a arranged at intervals along the extending direction of two precut lines 11, respectively. The notch 13a includes a first sub-notch 131 and a second sub-notch 132 respectively located at two sides of the precut line 11, that is, the notch 13a is divided into the first sub-notch 131 and the second sub-notch 132 by the precut line 11, wherein the second sub-notch 132 is located at the tearing portion 12. The dashed line in the notch 13a in fig. 1-3 does not mean that the precut line 11 extends into the notch 13a, but rather, the first sub-notch 131 and the second sub-notch 132 are defined.
After tearing the tearing portion 12, as shown in fig. 4 and 5, at least two initial portions for the next tearing process are formed on the battery coating film 10, the first sub-notch 131 and the second sub-notch 132 are separated, and a tilted tearing portion 13b is formed at the portion of the initial portion located between the adjacent two first sub-notches 131, which is because the battery coating film 10 is ductile, after tearing the tearing portion 12, the portion of the initial portion located between the adjacent two first sub-notches 131 is separated from the surface of the single battery and loses viscosity to be tilted, so that when separating the battery coating film 10 from the single battery, the tearing portion 12 is torn first, and then the tearing portion 13b can be pinched or clamped to tear the rest of the battery coating film 10 from the single battery, so that the battery coating film 10 is more convenient to tear, the recovery of the battery coating film 10 is facilitated, the recovery efficiency of the battery coating film 10 is further facilitated, and compared with the method of breaking the battery coating film 10 and the waste caused by the incineration of the energy source of the secondary battery can be effectively solved.
In this embodiment, the notch 13a may be integrally punched and formed during the manufacturing process of the battery coating film 10, so that the manufacturing process of the battery coating film 10 may be simplified, and the first sub-notch 131 and the second sub-notch 132 form a complete notch 13a shape. And it will be appreciated that the tear portion 12 and the tear portion 13b are connected by the precut line 11 before the tear portion 12 has been torn, the first sub-notch 131 being located at the starting portion and the second sub-notch 132 being located at the tear portion 12.
In this embodiment, the battery coating film 10 may be a heat-shrinkable film made of a thermoplastic material, such as a polyvinyl chloride heat-shrinkable film, a biaxially oriented polyolefin shrink film, a polyester heat-shrinkable film, etc., so that when the battery coating film 10 is coated on the outer surface of the single battery, the battery coating film 10 can shrink and be tightly adhered to the outer surface of the single battery in a heating manner, and the operation is convenient and simple.
In the present embodiment, the precut line 11 may have various implementations, for example, the precut line 11 may be a score line provided on the battery coating film 10, a broken line formed by a plurality of small through holes provided on the battery coating film 10 in a spaced arrangement, or the like. As to what kind of structure the precut line 11 is, it is possible to determine according to the specific situation, and is not limited in the present embodiment.
As can be seen from the foregoing, the notch 13a is integrally punched and formed during the manufacturing process of the battery coating film 10, so the first sub-notch 131 and the second sub-notch 132 are each composed of a complete line segment.
In some embodiments, the shape of the notch 13a may be circular, approximately circular, oval, approximately elliptical, or other shapes whose contour lines include arc segments, and then the first contour line 133 of the first sub-notch 131 and/or the second contour line 134 of the second sub-notch 132 include at least one arc segment (e.g., arc segments), that is, the first contour line 133 of the first sub-notch 131 may include at least one arc segment, or the second contour line 134 of the second sub-notch 132 may include at least one arc segment, or the first contour line 133 of the first sub-notch 131 and the second contour line 134 of the second sub-notch 132 may each include at least one arc segment. Preferably, the first contour 133 of the first sub-notch 131 and the second contour 134 of the second sub-notch 132 each include at least one arc segment. When tearing the portion 12 of tearing, because the existence of arc for the tearing force can carry out stress dispersion at the arc, prevent that the battery coating film 10 from tearing along with tearing portion 12 and tear, and lead to the unable condition of forming the portion 13b of tearing of the initiating part of battery coating film 10, thereby ensure to tear after tearing portion 12, can be in the initiating part be located the portion of two adjacent first sub-breach 131 and form the portion 13b of tearing of perk, and then conveniently pinch or hold this portion 13b of tearing off the other parts of battery coating film 10 remainder from the battery cell, make the tearing of battery coating film 10 more convenient, make things convenient for the recovery of battery coating film 10, and then be favorable to improving the recovery efficiency of battery coating film 10.
The dashed lines present in the notch 13a in fig. 6, 7 are shown by way of example in connection with fig. 4 to 7, wherein the dashed lines do not mean that the precut line 11 extends into the notch 13a, but rather in order to divide the first sub-notch 131 and the second sub-notch 132. The first contour 133 of the first sub-notch 131 and/or the second contour 134 of the second sub-notch 132 includes a first arc 1331, where the first arc 1331 is located at a middle position of the first contour 133 and/or the second contour 134, i.e., there may be and only the first contour 133 of the first sub-notch 131 includes the first arc 1331, and then the first arc 1331 is located at a middle position of the first contour 133 of the first sub-notch 131, or there may also be and only the second contour 134 of the second sub-notch 132 includes the first arc 1331, where the first arc 1331 is located at a middle position of the second contour 134 of the second sub-notch 132, or, where the first contour 133 of the first sub-notch 131 and the second contour 134 each include the first arc 1331, and the first arc 1331 of the second contour 134 are located at a middle position of the first contour 133, and the second arc 1331 of the second contour 134 are located at a middle position of the second contour 134. Preferably, the first contour line 133 of the first sub-notch 131 and the second contour line 134 of the second sub-notch 132 each include a first arc line 1331, the first arc line 1331 of the first contour line 133 is located at a middle position of the first contour line 133, and the first arc line 1331 of the second contour line 134 is located at a middle position of the second contour line 134.
When tearing the tear portion 12, through holding or holding the tear portion 13b that is located two adjacent notches 13a, in order to carry out the tear film process that other parts that will remain of battery coating film 10 of next stage tear down from the battery cell, when tearing the initial part to first pitch arc section 1331, this is because the existence of first pitch arc section 1331 for tear force can carry out stress dispersion at first pitch arc section 1331, and can not appear transversely tearing and lead to tearing the circumstances of membrane process disconnection, in order to ensure the integrality of battery coating film 10 tear film process, thereby make the tear of battery coating film 10 more convenient, the recovery of battery coating film 10 has been made things convenient for, and then be favorable to improving the recovery efficiency of battery coating film 10. The first arc section 1331 may be a circular arc section or a parabolic section.
In some embodiments, as shown in fig. 5 to 7, the first sub-notch 131 and/or the second sub-notch 132 may be a stepped notch, that is, there may be and only the first sub-notch 131 is a stepped notch, or there may also be and only the second sub-notch 132 is a stepped notch, or both the first sub-notch 131 and the second sub-notch 132 are stepped notches. Preferably, the first sub-notch 131 and the second sub-notch 132 are each a stepped notch, the stepped notch includes a first notch portion 1311 and a second notch portion 1312 that are in communication with each other, in a direction perpendicular to the precut line 11, for example, in a direction X0-X1 in fig. 3, 4 and 5, the first notch portion 1311 is further away from the second sub-notch 132 or the first sub-notch 131 than the second notch portion 1312, that is, the first notch portion 1311 of the first sub-notch 131 is further away from the second sub-notch 132 than the second notch portion 1312, and the first notch portion 1311 of the second sub-notch 132 is further away from the first sub-notch 131 than the second notch portion 1312, the first contour 133 and the second contour 134 each include a first sub-contour 133a surrounding the first notch portion 1311 and a second sub-contour 133b surrounding the second notch portion 1312, the first arc segment 1331 being located at a middle position of the first sub-contour 133 a; and the width of the first notch portion 1311 is smaller than the width of the second notch portion 1312 in the extending direction of the precut line 11 to form a stepped line 1313 between the first notch portion 1311 and the second notch portion 1312. By designing the first sub-notch 131 and the second sub-notch 132 to include the stepped notch of the first notch portion 1311 and the second notch portion 1312, and making the width of the second notch portion 1312 of the first sub-notch 131 closer to the second sub-notch 132 smaller than the width of the first notch portion 1311, the width of the second notch portion 1312 of the second sub-notch 132 closer to the first sub-notch 131 is smaller than the width of the first notch portion 1311, the width of the position where the tear portion 12 and the tear portion 13b are connected by the precut line 11 is relatively small, and the tear portion 12 is easily torn, so that the tear portion 12 is more labor-saving and quick, while also ensuring that the tear portion 13b is formed at the starting portion, providing a pinched or held position for tearing off the remaining portion of the battery wrapping film 10 from the single battery cell, so that the tear portion of the battery wrapping film 10 is easily torn.
Further, as shown in fig. 6 and 7, the junction of the first sub-profile line 133a and the step line 1313 is provided with a second arc 1332, and the junction of the second sub-profile line 133b and the step line 1313 is provided with a third arc 1333. Thus, when the tearing initiation portion is prepared, when the battery wrapping film 10 is gradually torn from the tearing initiation portion 13b to the second arc line 1332 and the third arc line 1333, the second arc line 1332 and the third arc line 1333 can be utilized to perform stress dispersion on the tearing force coming to the tearing initiation portion, so that the problem that the subsequent tearing film is affected due to the fact that the tearing initiation portion 13b is broken because the tearing initiation portion is arranged at a right angle is avoided, and the tearing initiation portion 13b can gradually tilt along the second arc line 1332 and the third arc line 1333 so as to pinch or clamp the tearing initiation portion 13b, thereby facilitating tearing of the battery wrapping film 10 and recycling the battery wrapping film 10.
Wherein, the second arc line 1332 and the third arc line 1333 may be arc line segments or parabolic line segments.
In some embodiments, the distance between two adjacent notches 13a in the extending direction of the precut line 11 is 1mm-3mm, i.e. the width of the tear-off portion 13b in the extending direction of the precut line 11 is 1mm-3mm, such as 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.3mm, 2.5mm, 2.7mm or 3mm, etc. It will be appreciated that if the distance between two adjacent notches 13a in the extending direction of the precut line 11 is too small, the width of the tear-off portion 13b in the extending direction of the precut line 11 is too small, so that the tear-off portion 13b is easily torn by the tear-off portion 12 when the tear-off portion 12 is torn, thereby being unfavorable for the film tearing at the next stage, whereas if the distance between two adjacent notches 13a in the extending direction of the precut line 11 is too large, the width of the tear-off portion 13b in the extending direction of the precut line 11 is too large, and the tear-off portion 13b cannot be completely lifted after the tear-off portion 12 is torn, thereby also being unfavorable for the film tearing at the next stage. Therefore, by controlling the distance between the adjacent two notches 13a to be in the range of 1mm to 3mm, it is possible to ensure that the tear-off portion 13b is not torn by the tear-off portion 12 when the tear-off portion 12 is torn, and at the same time, it is also ensured that the tear-off portion 13b can be tilted after the tear-off portion 12 is torn off, so as to pinch or hold the tear-off portion 13b, thereby facilitating the tearing of the battery wrapping film 10 to recover the battery wrapping film 10.
As an alternative embodiment, as shown in fig. 6, the precut line 11 extends to the boundary line 14 of the battery wrapping film 10, so that the connection between the periphery of the tearing portion 12 and other portions of the battery wrapping film 10 except for the tearing portion 12 is an unstable connection, and the boundary line segment between the precut lines 11 can be used as a tearing position for tearing the tearing portion 12, so that the boundary line segment between the precut lines 11 can be pinched or clamped, and the whole tearing portion 12 is torn along the extending direction of the precut line 11, thereby facilitating the tearing of the whole tearing portion 12 away from the battery wrapping film 10, and facilitating the tearing of the tearing portion 12.
As an alternative embodiment, as shown in fig. 8, wherein the dashed line present in the notch 13a of fig. 8 does not mean that the precut line 11 extends into the notch 13a, but rather in order to divide the first sub-notch 131 and the second sub-notch 132. The battery coating film 10 is further provided with two hidden tangents 15 arranged at intervals, the two hidden tangents 15 are respectively connected between the two pre-tangent lines 11, and the two hidden tangents 15 are respectively positioned at two ends of the pre-tangent line 11. Like this, two pre-cut lines 11 and two hidden cut lines 15 can enclose and close and form the closed loop structure for the peripheral edge of tearing portion 12 and battery coating film 10 are all unstable connection except tearing portion 12 between other parts, thereby be convenient for tear whole tearing portion 12 from battery coating film 10, make tearing portion 12 tear more convenient. In this embodiment, when the battery coating film 10 needs to be torn, a force in a direction substantially perpendicular to the hidden tangent line 15 is applied to other parts of the battery coating film 10 except for the tearing portion 12, so that the hidden tangent line 15 is torn to form a tearing notch, and one side edge of the tearing notch formed on the tearing portion 12 is the tearing position for tearing the tearing portion 12, so that one side edge of the tearing notch formed on the tearing portion 12 can be pinched or clamped to pull the tearing portion 12, so that the whole tearing portion 12 is torn away from the battery coating film 10, and then the other remaining parts of the battery coating film 10 are torn off from the single battery.
In the present embodiment, the hidden line 15 may have various implementations, for example, the hidden line 15 may be a score line provided on the battery coating film 10, a broken line formed by a plurality of small through holes provided on the battery coating film 10 in a spaced arrangement, or the like. As to what kind of structure the hidden line 15 is, it is not limited in the present embodiment, and may be any kind according to circumstances.
In some embodiments, as shown in fig. 6 and 8, the battery wrapping film 10 is further provided with a tear line 16, where the extending direction of the tear line 16 and the extending direction of the precut line 11 are disposed at an angle, that is, the extending direction of the tear line 16 and the extending direction of the precut line 11 are not parallel, and the angle between the extending direction of the tear line 16 and the extending direction of the precut line 11 may be 30 °, 45 °, 60 °, 75 °, 80 °, 90 ° or the like, and preferably the angle between the extending direction of the tear line 16 and the extending direction of the precut line 11 is 90 °. Therefore, the battery coating film 10 can be provided with a plurality of starting tearing points, so that the battery coating film 10 is greatly convenient to tear, and when the battery coating film 10 is torn, the battery coating film 10 can be quickly torn down along the easy-to-tear line 16, and the tearing and recycling efficiency of the battery coating film 10 is effectively improved. In addition, the design of a plurality of starting tearing points is also convenient for tearing films in the next process by utilizing the starting part of the starting tearing points even if faults occur in the film tearing process.
For example, the hidden lines 15 may be a plurality of hidden lines 15 disposed at intervals, and the plurality of hidden lines 15 respectively extend to the boundary line 14 of the battery coating film 10, so that the boundary line segment between the two hidden lines 15 can be used as a tearing position for tearing the battery coating film 10, that is, the boundary line segment between the two hidden lines 15 can be pinched or clamped, and the battery coating film 10 is torn along the extending direction of the hidden lines 15, thereby facilitating the tearing of the battery coating film 10.
In the present embodiment, the easy-to-tear line 16 may have various implementations, for example, the easy-to-tear line 16 may be a score line provided on the battery coating film 10, a broken line formed by a plurality of small through holes provided on the battery coating film 10 in a spaced arrangement, or the like. As to what kind of structure the tear line 16 is, it is not limited in this embodiment, and may be any kind according to circumstances.
Referring to fig. 9, a secondary battery 100 is disclosed in a second aspect of the present invention, the secondary battery 100 includes a unit cell 20 and a battery coating film 10 as described above, and the battery coating film 10 is coated on the outer surface of the unit cell 20. It will be appreciated that the secondary battery 100 having the battery coating film 10 described above can bring about the same or similar advantageous effects as those of the battery coating film 10, and specific reference may be made to the description of the embodiment of the battery coating film 10, and the details thereof will not be repeated here. The unit cell 20 may be a prismatic cell, a circular cell, or the like. And the unit cell 20 may include a case having an opening in which the electrode assembly is built in, an electrode assembly, and an end cap assembly sealably disposed at the opening.
In some embodiments, the secondary battery 100 may include one single battery 20, or may include a plurality of single batteries 20 to form a battery module, a battery pack, a battery system, or the like. When the secondary battery 100 includes a plurality of unit cells 20, the plurality of unit cells 20 are arranged in an array, and thus, the interval between two adjacent unit cells 20 increases the thickness of the two-layer battery coating film 10, thereby facilitating the improvement of the creepage distance of the unit cells 20 and thus facilitating the improvement of the safety of the secondary battery 100. It can be appreciated that the practical application scenario of the secondary battery 100 provided by the embodiment of the present application may be, but is not limited to, the listed products, and may also be other application scenarios, and the embodiment of the present application does not strictly limit the application scenario of the secondary battery 100.
In some embodiments, the unit cell 20 includes a peripheral wall 21, a bottom side wall 22 and a top side wall 23, wherein the bottom side wall 22 is connected to one end of the peripheral wall 21, and the top side wall 23 is connected to the other end of the peripheral wall 21 and is disposed opposite to the top side wall 23; the battery coating film 10 includes a first portion 10a coated on the outer peripheral wall 21, a second portion 10b coated on the bottom side wall 22, and a third portion 10c coated on the top side wall 23, wherein the first portion 10a, the second portion 10b, and the third portion 10c each have a tear portion 12. In this way, the battery coating film 10 can be provided with the tearing portion 12 on a plurality of sides such as a side, a top surface and a bottom surface of the single battery 20, so that the portion of the battery coating film 10 corresponding to each side of the single battery 20 can form at least two initial portions for the next tearing process after the tearing portion 12 is torn, so that the remaining portion of the battery coating film 10 on each side of the single battery 20 is torn, and the film tearing efficiency of the battery coating film 10 can be greatly improved.
When the single battery is a rectangular battery, the outer peripheral wall of the single battery includes four sub peripheral walls, and the tearing part is arranged at the position of the battery coating film corresponding to the sub peripheral wall with the larger area for the four sub peripheral walls of the single battery, especially for the sub peripheral wall with the larger area, so that the film tearing efficiency of the battery coating film can be further improved.
A third aspect of the application discloses an electrical consumer (not shown) having a secondary battery as described hereinbefore. It can be appreciated that, with the electric device having the secondary battery described above, since the secondary battery can bring the same or similar beneficial effects as the battery coating film, the electric device can also bring the same or similar beneficial effects as the battery coating film, and the description of the embodiment of the battery coating film will be omitted herein.
The technical solution described in the embodiments of the present application is applicable to electric equipment using a secondary battery, such as an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc., wherein the spacecraft is, for example, an airplane, a rocket, a space plane, and a spacecraft, etc., the electric toy includes, for example, a fixed or mobile electric toy, specifically, an electric automobile toy, an electric ship toy, and an electric aircraft toy, etc., and the electric tool includes, for example, a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, specifically, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.
The secondary battery described in the embodiments of the present application is not limited to the above-described electric devices, but for simplicity of description, the following embodiments are described by taking an electric automobile as an example. The electric automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extending automobile. The interior of the electric vehicle may be provided with a secondary battery, and specifically, for example, the secondary battery may be provided at the bottom or the head or the tail of the electric vehicle. The secondary battery may be used for power supply of an electric vehicle, for example, the secondary battery may be used as an operation power source of the electric vehicle. The electric vehicle may further include a controller and a motor, the controller being used, for example, to control the secondary battery to supply power to the motor. The secondary battery can be used for starting, navigating and the like of the electric automobile, and of course, the secondary battery can also be used for driving the electric automobile to run, and the secondary battery can be used for substituting or partially substituting fuel oil or natural gas to provide driving for the electric automobile.
The above describes a battery coating film, a secondary battery and electric equipment disclosed in the embodiment of the present application in detail, and specific examples are applied to describe the principle and implementation of the present application, and the description of the above embodiments is only used to help understand the battery coating film, the secondary battery and electric equipment and core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present application, the present disclosure should not be construed as limiting the present application in summary.
Claims (11)
1. A battery coating film, characterized in that the battery coating film (10) is provided with two precut lines (11) arranged at intervals, so that the battery coating film (10) has a tearing part (12) between the two precut lines (11);
the battery coating film (10) is further provided with a plurality of notches (13 a) which are arranged along at least one extending direction of the precut line (11) at intervals, the notches (13 a) comprise a first sub-notch (131) and a second sub-notch (132) which are respectively positioned at two sides of the precut line (11), the second sub-notch (132) is positioned at the tearing part (12), other parts of the battery coating film (10) except the tearing part (12) are provided with a first contour line (133) which surrounds and forms the first sub-notch (131), and the tearing part (12) is provided with a second contour line (134) which surrounds and forms the second sub-notch.
2. The battery cover film according to claim 1, wherein the first contour line (133) of the first sub-notch (131) and/or the second contour line (134) of the second sub-notch (132) comprises at least one arc segment.
3. The battery cover film according to claim 1, wherein the first contour line (133) of the first sub-notch (131) and/or the second contour line (134) of the second sub-notch (132) comprises a first arc segment (1331), the first arc segment (1331) being located at a middle position of the first contour line (133) and/or the second contour line (134).
4. A battery coating film according to claim 3, wherein the first sub-notch (131) and/or the second sub-notch (132) is a stepped notch including a first notch portion (1311) and a second notch portion (1312) communicating with each other, the first notch portion (1311) being further away from the second sub-notch (132) or the first sub-notch (131) than the second notch portion (1312) in a direction perpendicular to the pre-cut line (11), the first contour line (133) and/or the second contour line (134) including a first sub-contour line (133 a) enclosing the first notch portion (1311) and a second sub-contour line (133 b) enclosing the second notch portion (1312), the first arc line (1331) being located at a middle position of the first sub-contour line (133 a);
the width of the first notch portion (1311) is smaller than the width of the second notch portion (1312) in the extending direction of the precut line (11) to form a step line (1313) between the first notch portion (1311) and the second notch portion (1312).
5. The battery coating film according to claim 4, wherein a second arc segment (1332) is provided at a junction of the first sub-profile line (133 a) and the step line (1313), and a third arc segment (1333) is provided at a junction of the second sub-profile line (133 b) and the step line (1313).
6. Battery coating film according to claim 1, characterized in that the distance between two adjacent notches (13 a) in the extension direction of the precut line (11) is 1mm-3mm.
7. Battery cover film according to any one of claims 1-6, characterized in that the pre-cut line (11) extends to the borderline (14) of the battery cover film (10), or that the battery cover film (10) is further provided with two hidden cut lines (15) arranged at intervals, the two hidden cut lines (15) being connected between the two pre-cut lines (11), respectively, and the two hidden cut lines (15) being located at both ends of the pre-cut line (11), respectively.
8. Battery coating film according to any one of claims 1-6, characterized in that the battery coating film (10) is further provided with frangible lines (16), the direction of extension of the frangible lines (16) being arranged at an angle to the direction of extension of the pre-cut line (11).
9. A secondary battery, characterized in that the secondary battery (100) comprises a unit cell (20) and the battery coating film (10) according to any one of claims 1 to 8, the battery coating film (10) being coated on the outer surface of the unit cell (20).
10. The secondary battery (100) according to claim 9, wherein the unit cell (20) includes a peripheral wall (21), a bottom side wall (22), and a top side wall (23), the bottom side wall (22) being connected to one end of the peripheral wall (21), the top side wall (23) being connected to the other end of the peripheral wall (21) and being disposed opposite to the top side wall (23);
The battery coating film (10) comprises a first part (10 a) coated on the peripheral wall (21), a second part (10 b) coated on the bottom side wall (22) and a third part (10 c) coated on the top side wall (23), wherein the first part (10 a), the second part (10 b) and the third part (10 c) are provided with the tearing part (12).
11. A powered device, characterized in that it has a secondary battery (100) as claimed in claim 9 or 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310981096.3A CN116706457A (en) | 2023-08-07 | 2023-08-07 | Battery coating film, secondary battery and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310981096.3A CN116706457A (en) | 2023-08-07 | 2023-08-07 | Battery coating film, secondary battery and electric equipment |
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| CN116706457A true CN116706457A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310981096.3A Pending CN116706457A (en) | 2023-08-07 | 2023-08-07 | Battery coating film, secondary battery and electric equipment |
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| CN (1) | CN116706457A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1919698A (en) * | 2006-09-19 | 2007-02-28 | 陈毕峰 | Packaging film stay and preparation method and apparatus thereof |
| CN204399696U (en) * | 2014-12-27 | 2015-06-17 | 刘兴丹 | The auxiliary band of complex film |
| CN215184227U (en) * | 2021-06-01 | 2021-12-14 | 东莞新能德科技有限公司 | Battery coating film, battery pack and electronic device |
-
2023
- 2023-08-07 CN CN202310981096.3A patent/CN116706457A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1919698A (en) * | 2006-09-19 | 2007-02-28 | 陈毕峰 | Packaging film stay and preparation method and apparatus thereof |
| CN204399696U (en) * | 2014-12-27 | 2015-06-17 | 刘兴丹 | The auxiliary band of complex film |
| CN215184227U (en) * | 2021-06-01 | 2021-12-14 | 东莞新能德科技有限公司 | Battery coating film, battery pack and electronic device |
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