CN116706459A - Outer envelope, energy storage device and electric equipment - Google Patents
Outer envelope, energy storage device and electric equipment Download PDFInfo
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- CN116706459A CN116706459A CN202310981217.4A CN202310981217A CN116706459A CN 116706459 A CN116706459 A CN 116706459A CN 202310981217 A CN202310981217 A CN 202310981217A CN 116706459 A CN116706459 A CN 116706459A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 239000012528 membrane Substances 0.000 claims description 140
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 21
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 12
- 239000003792 electrolyte Substances 0.000 description 8
- 238000004880 explosion Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920006257 Heat-shrinkable film Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 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
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 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
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920006300 shrink film Polymers 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
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses an outer coating film, an energy storage device and electric equipment, wherein the energy storage device is provided with an explosion-proof valve, the outer coating film comprises a first film and a second film, the first film is used for coating part of the surface of the energy storage device and exposing the explosion-proof valve, the second film is connected with the first film and is used for being arranged opposite to the explosion-proof valve, the second film is provided with a weak area, the weak area is broken when the explosion-proof valve is exploded or poked so as to form a tearing notch, and the tearing notch is used for tearing the tearing position of the second film. The outer envelope, the energy storage device and the electric equipment provided by the embodiment of the invention can be torn off from the surface of the single battery so as to facilitate the recovery of the outer envelope, thereby solving the problems of environmental pollution and resource waste caused by the incineration of the outer envelope and improving the recovery rate of the single battery.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to an outer coating film, an energy storage device and electric equipment.
Background
As the amount of use of the battery increases, consumption of electrode materials for preparing the battery increases, which results in an increase in raw material prices, and the battery needs to be retired for recycling after a certain period of use.
However, in the related art, expensive materials, such as lithium and cadmium, in the battery are mainly recovered through steps of crushing, screening, magnetic separation, collecting and the like, but reasonable recovery cannot be performed on cheaper materials or parts made of cheaper materials, for example, parts made of plastic materials such as an outer coating are usually burned after crushing, so that environment is polluted, resources are wasted, and the recovery rate of the battery is low.
Disclosure of Invention
The embodiment of the invention discloses an outer coating film, an energy storage device and electric equipment, which can tear the outer coating film off the surface of a single battery so as to facilitate the recovery of the outer coating film, thereby solving the problems of environmental pollution and resource waste caused by the incineration of the outer coating film and improving the recovery rate of the single battery.
In order to achieve the above object, in a first aspect, the present invention discloses an outer coating film for coating the surface of a single battery, the single battery is provided with an explosion-proof valve, and the outer coating film includes:
the first membrane is used for coating part of the surface of the single battery and exposing the explosion-proof valve; and
The second diaphragm, the second diaphragm with first diaphragm links to each other, just second diaphragm at least part be used for with explosion-proof valve is connected, the second diaphragm is equipped with the weak area, the weak area is in explosion-proof valve is exploded or by the time of stabbing open to form and play and tear the breach, play and tear the breach and be used for tearing the play of second diaphragm and tear the position.
The outer wrapping film comprises the first film and the second film, the first film is wrapped on the part surface of the single battery to expose the explosion-proof valve of the single battery, the second film and the explosion-proof valve are arranged oppositely, and the second film is provided with the weak area, so that after the explosion-proof valve is exploded or poked, the weak area on the second film can be broken due to weak connection strength of the weak area, so that a tearing notch is formed, the tearing notch can be used as a tearing position for tearing the second film, the second film can be torn by taking the tearing notch as a tearing point, the second film can drive the first film to tear off the surface of the single battery, the outer wrapping film can be conveniently torn off from the single battery, and compared with the mode of crushing, burning and the like of the retired single battery, the outer wrapping film can be conveniently and easily and conveniently disassembled, the outer wrapping film can be conveniently and quickly disassembled, the battery can be conveniently and effectively recovered, the waste of the single battery can be reduced, and the single battery can be effectively recovered.
In an embodiment of the first aspect of the present invention, a covering length of the first membrane covering the unit cell is greater than a covering length of the second membrane covering the unit cell in a length direction of the unit cell, and a first arc chamfer is formed at a connection position of the first membrane and the second membrane.
It is known that the outer wrapping film is ductile, and when the second film is torn, the first film is driven to tear the first film towards two sides of the width direction of the single battery, if the first film is required to be torn off in one time, when the first film is torn off, the length of a tearing area of the first film is larger than the width of the second film in the length direction of the single battery, and the first film is not broken when the first film is torn off, so that the continuity of tearing the first film is ensured, and therefore, in the length direction of the single battery, the covering length of the first film covering the single battery is required to be ensured to be larger than the covering length of the second film covering the single battery, so that when the first film is torn off, the first film is ensured to be torn off in one time. Meanwhile, a first circular arc chamfer is formed at the joint of the first membrane and the second membrane, so that when the second membrane drives the first membrane to tear along the width direction of the single battery, the first circular arc chamfer can generate forward tearing force perpendicular to the width direction of the single battery for the first membrane, so that the tearing force can be along the first circular arc chamfer for forward extension, after the second membrane is torn, the situation that midway breakage occurs after the first membrane is torn is avoided, and a tearing area widened along the length direction of the single battery can be formed for the first membrane, so that the first membrane is torn continuously.
In an alternative embodiment, in an embodiment of the first aspect of the present invention, at least two first hidden tangents are provided on the second film, and the at least two first hidden tangents form the weak area. When the second diaphragm covers the explosion-proof valve, the at least two first hidden tangents can be just right to the explosion-proof valve, so that when the explosion-proof valve is exploded, the airflow in the single battery can directly and positively impact the first hidden tangents, the first hidden tangents can be punched more easily and smoothly to form a tearing notch, two sides of the tearing notch are tearing positions for tearing the second diaphragm, and the side edges of the tearing notch can be pinched or clamped to pull the second diaphragm so as to drive the first diaphragm to be torn from the surface of the single battery. And through setting up two at least first hidden tangent lines on the second diaphragm, after first hidden tangent line department is punched and is formed and play tearing breach, the region that is located two adjacent first hidden tangent lines of second diaphragm is broken easily and is divided into two perk limit, also can pinch or hold this perk limit like this and tear the second diaphragm for the tearing of outer diolame is more convenient, thereby can improve outer diolame recovery efficiency effectively.
As an alternative embodiment, in an embodiment of the first aspect of the present invention, the at least two first hidden tangents are disposed parallel to each other. It can be known that if the first hidden tangents intersect at a point, the structural strength of the intersection of the first hidden tangents is weaker than that of other positions of the first hidden tangents, so that under the action of a smaller external force, for example, the intersection of the first hidden tangents is mistakenly touched, the intersection of the first hidden tangents is broken, and dust, powder and electrolyte enter the explosion-proof valve through cracks at the intersection of the first hidden tangents to pollute the explosion-proof valve, thereby influencing the service life of the explosion-proof valve and normal valve opening. Therefore, the first hidden tangent lines are limited to be mutually parallel, so that the first hidden tangent lines can be ensured to be broken under the action of enough external force, the situation that the first hidden tangent lines are randomly broken due to false collision is avoided, and the situation that dust, powder, electrolyte and the like pollute an explosion-proof valve is reduced or avoided.
In an optional implementation manner, in an embodiment of the first aspect of the present invention, the first hidden tangent lines are two, and the second membrane is provided with two second hidden tangent lines, where one second hidden tangent line is connected to one end of the two first hidden tangent lines and is located at the same end of the two first hidden tangent lines, and the other second hidden tangent line is connected to the other end of the two first hidden tangent lines and is located at the same end of the two first hidden tangent lines. Thus, the two first hidden tangent lines and the two second hidden tangent lines are enclosed to form a closed-loop structure, when the single battery is in thermal runaway, the central part of the closed-loop structure can be separated from the second diaphragm, so that a larger tearing notch is formed on the second diaphragm, the side edge of the tearing notch is convenient to pinch or hold to tear the second diaphragm, the outer envelope is more convenient to tear, and the recovery efficiency of the outer envelope can be effectively improved; meanwhile, more high-temperature high-pressure gas can be ensured to leave the inside of the single battery from the tearing notch in time, the possibility of explosion of the single battery is greatly reduced, and the safety of the single battery is further improved.
In an optional implementation manner, in an embodiment of the first aspect of the present invention, the second hidden tangent line is an arc line, and a second arc chamfer is formed at a connection position of the second hidden tangent line and the first hidden tangent line. So, when the monomer battery takes place thermal runaway to when making the central part of closed loop structure break away from the second diaphragm, the position department of connecting between first hidden tangent line and the second hidden tangent line is difficult for appearing the condition that the atress is concentrated, can prevent to appear between first hidden tangent line and the second hidden tangent line by tearing, tear the condition of breaking even, thereby can avoid the condition that the central part that leads to closed loop structure can not wholly break away from the second diaphragm because of appear tearing or tearing between first hidden tangent line and the second hidden tangent line.
In an embodiment of the first aspect of the present invention, the explosion-proof valve has an elliptical structure, the explosion-proof valve has a long axis direction, the explosion-proof valve is provided with at least two scores, two ends of each score are located at two ends of the explosion-proof valve in the long axis direction, the at least two first hidden tangents are parallel to the long axis direction, and projections of each first hidden tangents on the explosion-proof valve are respectively overlapped with each score.
When the single battery is out of control, the explosion-proof valve is exploded from the notch by the high-temperature and high-pressure gas generated in the single battery, and the high-temperature and high-pressure gas is released from the notch to form concentrated impact force on the first hidden tangent line, so that a weak area formed by a plurality of first hidden tangent lines can be broken more quickly to form a tearing notch, and the second diaphragm can be torn and pulled by taking the tearing notch as a tearing point to drive the first diaphragm to be torn from the surface of the single battery, so that the outer envelope is conveniently torn from the single battery, and the outer envelope is conveniently recovered; meanwhile, the high-temperature and high-pressure gas in the single battery can be conveniently and quickly separated from the inside of the single battery from the tearing notch, the possibility of explosion of the single battery can be greatly reduced, and the safety of the single battery is further improved.
In an alternative embodiment, in an embodiment of the first aspect of the present invention, the first membrane has a first area for covering the bottom of the unit cell, and the first area is provided with a plurality of third hidden tangents extending along the length direction of the unit cell.
It can be known that when tearing the second diaphragm, the first diaphragm is driven to tear the first diaphragm towards two sides of the width direction of the single battery, and then the first diaphragm is torn towards the thickness direction of the single battery, and a plurality of third hidden tangents extending along the length direction of the single battery are arranged on the first area, so that at least one third hidden tangents can be formed on two sides of the width direction of the single battery, at least one starting position of a tearing opening is formed on two sides of the width direction of the single battery, if the first diaphragm is broken when being torn to the bottom of the single battery in the process of tearing the first diaphragm, the whole outer envelope cannot be torn continuously, and the tearing opening formed at the third hidden tangents can be the starting position of a continuous tearing film so as to tear the whole outer envelope.
In an optional implementation manner, in an embodiment of the first aspect of the present invention, a plurality of fourth hidden tangents are disposed on two sides of the first area in a length direction of the unit cell, and the fourth hidden tangents are located between the two adjacent third hidden tangents.
Like this, the bottom of battery cell can form the initial position of two at least mouths of tearing in the ascending both sides of length direction of battery cell, because first diaphragm has stronger ductility generally, after the broken tearing of fourth hidden tangent line, the part that lies in two adjacent mouths of tearing of first diaphragm can break away from battery cell's surface, forms a part and can be used to by the perk region of pinching or holding to can pinch or hold this perk region and tear first diaphragm, make the tearing of first diaphragm more convenient, thereby can improve the recovery efficiency of outer diolame effectively. And the design of many tearing openings also is convenient for tear the membrane in-process even appear the fault, also can utilize the beginning position of this tearing opening to continue the dyestripping of next process.
As an alternative implementation manner, in the embodiment of the first aspect of the present invention, the first membrane and the second membrane are integrally formed by injection molding, so that when the first membrane is torn through the second membrane, a situation that a break is not easy to occur between the second membrane and the first membrane can be caused.
In a second aspect, the invention discloses an energy storage device, which comprises a single battery and the outer membrane according to the first aspect, wherein the single battery is provided with an explosion-proof valve, the first membrane of the outer membrane is coated on part of the surface of the single battery and exposes out of the explosion-proof valve, and the second membrane is arranged opposite to the explosion-proof valve. The energy storage device with the outer envelope in the first aspect can tear the outer envelope from the surface of the single battery, so that the outer envelope can be recovered conveniently, and the problems of environmental pollution and resource waste caused by incineration of the outer envelope can be solved, so that the recovery rate of the energy storage device is improved.
In a third aspect, the invention discloses a powered device, which is provided with an energy storage device according to the second aspect. The electric equipment with the energy storage device according to the second aspect has the beneficial effects of the outer coating according to the first aspect, so that the electric equipment disclosed by the third aspect of the invention can tear the outer coating from the surface of the single battery so as to facilitate recovery of the outer coating, thereby solving the problems of environmental pollution and resource waste caused by burning the outer coating and improving the recovery rate of the energy storage device.
Compared with the prior art, the invention has the beneficial effects that:
according to the outer envelope, the energy storage device and the electric equipment, the outer envelope comprises the first membrane and the second membrane, the first membrane is wrapped on the part surface of the single battery to expose the explosion-proof valve of the single battery, the second membrane is arranged opposite to the explosion-proof valve, and the second membrane is provided with the weak area, so that after the explosion-proof valve is exploded or poked, the weak area on the second membrane is broken due to the weak connection strength of the weak area, so that a tearing notch is formed, at the moment, the tearing notch can be used as a tearing position for tearing the second membrane, the second membrane can be torn by taking the tearing notch as a tearing point, and the second membrane can drive the first membrane to tear off the surface of the single battery, so that the outer envelope is conveniently torn off from the single battery, and compared with the mode of crushing, burning and the like when the retired single battery is recovered, the outer envelope is relatively simple and convenient to disassemble the outer envelope, the tearing notch can be used as a tearing notch, the tearing efficiency of the outer envelope can be reduced, the waste of the single battery can be effectively reduced, and the recycling efficiency of the outer envelope can be effectively improved.
In addition, the second membrane can replace the original protection patch of the explosion-proof valve, namely, the second membrane can play a role in preventing electrolyte from dripping on the explosion-proof valve and other external impurities from falling on the explosion-proof valve in the single battery production process, so that the situation that dust, powder, electrolyte and the like pollute the explosion-proof valve is reduced or even avoided, and the service life of the explosion-proof valve is prolonged; and meanwhile, the normal valve opening of the explosion-proof valve can be ensured.
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 diagram of an energy storage device according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the structure of an outer envelope disclosed in an embodiment of the present invention;
FIG. 3 is a first schematic illustration of a second diaphragm according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second construction of a second diaphragm according to an embodiment of the present invention;
FIG. 5 is a schematic view of a third construction of a second diaphragm according to an embodiment of the present invention;
fig. 6 is a schematic view of a second diaphragm covering an explosion-proof valve according to an embodiment of the present invention.
Description of the main reference numerals
100-an energy storage device;
10-coating; 11-a first membrane; 111-a first region; 1111-a third hidden tangent; 1112-fourth hidden tangent; 12-a second membrane; 121-a region of weakness; 121 a-a first hidden tangent; 121 b-edge-lifting; 122-a second hidden tangent; 13-a first arc chamfer; 14-chamfering the second arc;
20-single battery; 21-explosion-proof valve; 211-scoring.
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 application will be further described with reference to the examples and the accompanying drawings.
The embodiment of the application discloses an outer coating film, as shown in fig. 1, the outer coating film 10 can be used for coating the surface of a single battery 20, and the single battery 20 is provided with an explosion-proof valve 21. The unit cell 20 may be a prismatic cell or a circular cell. The case where the outer coating film 10 is coated on the surface of the rectangular battery is described as an example (as shown in fig. 1), and for convenience of description, the length direction of the unit battery 20 shown in fig. 1 is defined as the left-right direction, the width direction of the unit battery 20 is the front-rear direction, the thickness direction of the unit battery 20 is the up-down direction, and the left-right direction, the front-rear direction, and the up-down direction are perpendicular to each other. In this embodiment, the terms "upper" and "lower" and the like are described according to the directions shown in fig. 1 of the specification, which do not limit the battery cell 20 in the practical application scenario.
As shown in fig. 1 and 2, the outer coating film 10 includes a first film 11 and a second film 12, where the first film 11 is used to cover a part of the surface of the unit battery 20 and expose the explosion-proof valve 21, and the first film 11 is also called an insulating blue film, and the function of the insulating blue film is mainly that after the unit batteries 20 form a battery module in a group, the adjacent housings of the unit batteries 20 can be arranged in an insulating manner. The second membrane 12 is connected to the first membrane 11, and the second membrane 12 is at least partially connected to the explosion-proof valve 21, i.e. it may be that the entire second membrane 12 is connected to the explosion-proof valve 21, or that a portion of the second membrane 12 is connected to the explosion-proof valve 21, and another portion is connected to the surface of the unit cell 20, and the second membrane 12 is provided with a weakened area 121, which weakened area 121 is connected to the explosion-proof valve 21 to be broken when the explosion-proof valve 21 is exploded or poked, so as to form a tear-off notch for tearing the outer envelope 10.
That is, when the single battery 20 is thermally out of control, a large amount of gas is generated in the single battery 20 to make the explosion-proof valve 21 burst, which means that the single battery 20 cannot be used continuously and needs to be recovered, because the connection strength of the weak area 121 is weak, when the explosion-proof valve 21 bursts, the weak area 121 on the second membrane 12 is broken to form a tearing notch, at this time, the tearing notch can be used as a tearing position for tearing the second membrane 12, so that the second membrane 12 can be torn by taking the tearing notch as a tearing point, and the second membrane 12 can drive the first membrane 11 to tear from the surface of the single battery 20, so that the outer membrane 10 can be conveniently torn from the single battery 20, and the outer membrane 10 can be recovered conveniently; or, although the explosion-proof valve 21 is not exploded, the performance of the explosion-proof valve 21 fails, the single battery 20 cannot be used continuously, and needs to be recovered, and the recovery of the single battery 20 is to tear the explosion-proof valve 21 to discharge the gas accumulated in the single battery 20, and the weak area 121 of the second membrane 12 is to be torn when the explosion-proof valve 21 is torn, so that the weak area 121 on the second membrane 12 can be torn to form a tearing notch, and at the moment, the tearing notch can also tear the tearing position of the second membrane 12, so that the second membrane 12 can tear the second membrane 12 by taking the tearing notch as a tearing point, and the second membrane 12 can drive the first membrane 11 to tear off the surface of the single battery 20, so that the outer membrane 10 can be torn off the single battery 20, and the outer membrane 10 can be recovered conveniently.
Therefore, compared with the mode of crushing, burning and the like the outer envelope 10 and the like when the retired single battery 20 is recovered, the outer envelope 10 provided by the application is coated on the surface of the single battery 20, so that the outer envelope 10 outside the single battery 20 is easy and convenient to disassemble, the recovery of the outer envelope 10 is convenient and quick, the recovery efficiency of the single battery 20 can be improved, the recovery rate of the single battery 20 can be effectively improved, the pollution can be reduced, and the waste of resources can be reduced.
In addition, the second membrane 12 can replace the original protection patch of the explosion-proof valve, that is, the second membrane 12 can play a role in preventing the electrolyte from dripping onto the explosion-proof valve 21 and preventing other external impurities from falling onto the explosion-proof valve 21 in the production process of the single battery 20, so as to reduce or even avoid the situation that dust, powder, electrolyte and the like pollute the explosion-proof valve 21, thereby being beneficial to prolonging the service life of the explosion-proof valve 21; at the same time, the normal opening of the explosion-proof valve 21 can be ensured.
It should be explained that, in the present application, the first membrane 11 is coated on a part of the surface of the single battery 20 and exposes the explosion-proof valve 21 on the single battery 20, that is, the explosion-proof valve 21 is not coated by the first membrane 11, so that the explosion-proof valve 21 can be exposed on the first membrane 11, but is coated by the second membrane 12 with the weak area 121, so that when the single battery 20 is out of control, the weak area 121 is more easily broken and broken under the action of external force to form a tearing notch, and the second membrane 12 can be torn by taking the tearing notch as a tearing point, so as to drive the first membrane 11 to be torn from the surface of the single battery 20, thereby facilitating the recovery of the outer envelope 10; meanwhile, the explosion-proof valve 21 can be smoothly flushed away, so that the explosion-proof valve 21 can be timely actuated, high-temperature and high-pressure gas can be timely discharged from the inside of the single battery 20, and the safety of the single battery 20 is improved. In the coating process, the second membrane 12 is attached above the explosion-proof valve 21 to cover the corresponding area of the explosion-proof valve 21, then the first membrane 11 is attached to the large surface of the single battery 20, and when the first membrane 11 is coated on the top of the single battery 20, a part of the first membrane 11 is attached to a part of the second membrane 12.
The "actuation" referred to in the present application means that the explosion-proof valve 21 is actuated or activated to a state such that the internal pressure of the unit cell 20 is released. The action by the explosion proof valve 21 may include, but is not limited to: at least a portion of the explosion proof valve 21 breaks, is torn or opened, etc. When the explosion-proof valve 21 is actuated, high-temperature and high-pressure gas inside the single battery 20 is discharged from the actuated portion. In this way, the cell 20 can be depressurized under controlled pressure, thereby avoiding a potentially more serious accident.
In this embodiment, the first film 11 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 first film 11 is coated on a portion of the surface of the unit cell 20, the first film 11 can be shrunk and tightly adhered to a portion of the surface of the unit cell 20 by heating, which is convenient and simple to operate. Similarly, the second membrane 12 and the first membrane 11 can be made of the same material, so that the materials for manufacturing the outer envelope 10 can be relatively single, which is beneficial to reducing the manufacturing cost of the outer envelope 10.
In some embodiments, the first membrane 11 and the second membrane 12 may be integrally injection molded, so that when the first membrane 11 is torn by the second membrane 12, a fracture is unlikely to occur between the second membrane 12 and the first membrane 11; the two may be separately manufactured and then connected, such as adhesion, and the like, and the present invention is not limited thereto.
In some embodiments, in the length direction of the single battery 20, the coverage length of the first membrane 11 covering the single battery 20 is greater than the coverage length of the second membrane 12 covering the single battery 20, and the connection part of the first membrane 11 and the second membrane 12 is formed with a first arc chamfer 13. It is known that the outer wrapping film 10 is ductile and can pull the first film 11 to tear the first film 11 toward both sides of the width direction of the unit cell 20 while tearing the second film 12, if it is desired to tear the first film 11 at one time, the length of the tearing area of the first film 11 is greater than the width of the second film 12 in the length direction of the unit cell 20 when tearing the first film 11, so that the first film 11 is not broken when tearing to ensure the continuity of tearing the first film 11, so that it is necessary to ensure that the covering length of the first film 11 covering the unit cell 20 is greater than the covering length of the second film 12 covering the unit cell 20 in the length direction of the unit cell 20, so as to ensure that the first film 11 can be torn at one time when tearing the first film 11. Meanwhile, a first arc chamfer 13 is formed at the joint of the first membrane 11 and the second membrane 12, when the second membrane 12 drives the first membrane 11 to tear along the width direction of the single battery 20, the first arc chamfer 13 can generate forward tearing force perpendicular to the width direction of the single battery 20 for the first membrane 11, so that the tearing force can be carried out along the first arc chamfer 13, and therefore after the second membrane 12 is torn, the situation that midway breakage occurs after the first membrane 11 is torn is avoided, and a tearing area which is widened along the length direction of the single battery 20 can be formed for the first membrane 11, so that the first membrane 11 can be torn continuously.
In addition, the setting of first circular arc chamfer 13, when pulling second diaphragm 12 and driving first diaphragm 11 and tearing from battery cell 20, the condition that the position department of being connected between first diaphragm 11 and the second diaphragm 12 is difficult for appearing the atress concentrated can prevent to appear between first diaphragm 11 and the second diaphragm 12 by tearing, tear the condition of breaking even to can avoid tearing or tearing the condition and leading to first diaphragm 11 and the condition that second diaphragm 12 can not be once torn down because of appearing between first diaphragm 11 and the second diaphragm 12.
In this embodiment, the weakened area 121 is an area of the second film sheet 12 having a structural strength smaller than that of the first film sheet 11 and the second film sheet 12. The structural strength mentioned in the embodiment of the present application refers to: fracture resistance properties of the corresponding structure. The higher the structural strength is, the less the structure is likely to break under the action of external force; the smaller the structural strength, the greater the likelihood of the structure breaking under the action of external forces. The weakened area 121 is more easily broken by an external force than the first and second diaphragms 11 and 12. The weakened area 121 may have various implementations, for example, the weakened area 121 may be a hidden line provided on the second film 12, a thinned groove provided on the second film 12, or the like. As to what kind of structure the weakened area 121 is specifically, it may be determined according to circumstances, and is not limited in this embodiment.
Preferably, the weakened area 121 is a hidden line provided on the second film 12, and the hidden line may be a score line provided on the second film 12, or may be a plurality of through holes provided on the second film 12 in a spaced arrangement, or the like. As to what kind of structure the hidden line is, it can be determined according to the specific situation, and the embodiment is not limited thereto.
In some embodiments, as shown in fig. 1 to 4, at least two first hidden lines 121a are disposed on the second film 12, that is, a plurality of first hidden lines 121a, for example, two, three, four, five or more, are disposed on the second film 12, and the at least two first hidden lines 121a form the weak area 121. The first hidden tangent line 121a shown in fig. 3 is connected to the boundary line of the second membrane 12, the first hidden tangent line 121a shown in fig. 4 is not connected to the boundary line of the second membrane 12, and when the second membrane 12 is covered on the explosion-proof valve 21, the at least two first hidden tangent lines 121a may be opposite to the explosion-proof valve 21, so that when the explosion-proof valve 21 is exploded, the airflow in the unit cell 20 may directly impact the first hidden tangent line 121a, so that the first hidden tangent line 121a may be punched more easily and smoothly to form a tearing notch, and two sides of the tearing notch may tear the tearing position of the second membrane 12, so as to pinch or clamp the side of the tearing notch to tear the second membrane 12, so as to drive the first membrane 11 to tear from the surface of the unit cell 20. And through setting up two at least first hidden tangent lines 121a on second diaphragm 12, after first hidden tangent line 121a department is punched out and is formed and tear the breach, the region that is located adjacent two first hidden tangent lines 121a of second diaphragm 12 is broken easily and is divided into two perk limit 121b, also can pinch or hold this perk limit 121b and tear second diaphragm 12 like this for the tearing of outer package membrane 10 is more convenient, thereby can improve outer package membrane 10's recovery efficiency effectively.
It can be appreciated that when the first hidden line 121a is two, after the first hidden line 121a is punched to form a tearing notch, the second membrane 12 may form two raised edges 121b; when the first hidden tangent lines 121a are three, after being punched at the first hidden tangent lines 121a to form tearing notches, the second membrane 12 can form four tilted edges 121b; when the first hidden lines 121a are four, after the first hidden lines 121a are punched to form tearing notches, the second membrane 12 may form six raised edges 121b, and so on.
In some embodiments, the plurality of first hidden lines 121a are disposed parallel to each other. It can be known that if the first hidden tangents 121a intersect at a point, the structural strength of the intersection of the first hidden tangents 121a is weaker than that of other positions of the first hidden tangents 121a, so that under the action of a smaller external force, for example, the intersection of the first hidden tangents 121a is mistakenly touched, the intersection of the first hidden tangents 121a may be broken, and thus dust, powder and electrolyte enter the explosion-proof valve 21 through the cracks at the intersection of the first hidden tangents 121a to pollute the explosion-proof valve 21, and the service life of the explosion-proof valve 21 and normal valve opening are affected. Therefore, by defining the plurality of first hidden-cut lines 121a to be disposed parallel to each other, it is possible to ensure that the first hidden-cut lines 121a are broken by a sufficiently large external force, so as to avoid the situation that the first hidden-cut lines 121a are broken at will by a false touch, thereby reducing or avoiding the situation that dust, powder, electrolyte, and the like contaminate the explosion-proof valve 21.
As shown in fig. 5, the first hidden lines 121a are two, and two second hidden lines 122 are disposed on the second film 12, wherein one second hidden line 122 is connected to one end of the two first hidden lines 121a and is located at the same end of the two first hidden lines 121a, and the other second hidden line 122 is connected to the other end of the two first hidden lines 121a and is located at the same end of the two first hidden lines 121 a. Thus, the two first hidden tangent lines 121a and the two second hidden tangent lines 122 are enclosed to form a closed loop structure, so that when the single battery 20 is out of control, the central part of the closed loop structure can be separated from the second membrane 12, thereby forming a larger tearing notch on the second membrane 12, not only facilitating pinching or clamping the side edge of the tearing notch to tear the second membrane 12, but also facilitating the tearing of the outer coating 10, and effectively improving the recovery efficiency of the outer coating 10; meanwhile, more high-temperature high-pressure gas can be ensured to leave the inside of the single battery 20 from the tearing notch in time, the possibility of explosion of the single battery 20 is greatly reduced, and the safety of the single battery 20 is further improved.
The second hidden line 122 may be a score line provided on the second film 12, or may be a plurality of through holes provided on the second film 12 in a spaced arrangement, or the like. As to what kind of structure the second hidden line 122 is, it can be determined according to the specific situation, and the embodiment is not limited thereto.
In some embodiments, the second hidden tangent line 122 may be an arc, and the connection between the second hidden tangent line 122 and the first hidden tangent line 121a forms the second arc chamfer 14. Thus, when the single battery 20 is out of control, so that the central part of the closed loop structure is separated from the second membrane 12, the situation that the stress is concentrated is not easy to occur at the connecting position between the first hidden tangent line 121a and the second hidden tangent line 122, and the situation that the first hidden tangent line 121a and the second hidden tangent line 122 are torn or even broken can be prevented, thereby avoiding the situation that the central part of the closed loop structure cannot be integrally separated from the second membrane 12 due to the situation that the first hidden tangent line 121a and the second hidden tangent line 122 are torn or broken.
In the present embodiment, as shown in fig. 1, 2 and 6, the explosion-proof valve 21 may have a square structure, a circular structure, an oval structure, or the like. Illustratively, the explosion proof valve 21 is of an oval configuration, and the explosion proof valve 21 has a major axis direction and a minor axis direction. The explosion-proof valve 21 is provided with at least two scores 211, such as two, three, four, five or more scores 211, and the like, both ends of each score 211 are located at both ends of the explosion-proof valve 21 in the long axis direction thereof, the plurality of first hidden tangents 121a are parallel to the long axis direction of the explosion-proof valve 21, and the projections of each first hidden tangents 121a on the explosion-proof valve 21 are partially overlapped with each score 211, for example, as shown in fig. 6, the score 211 is two, the first hidden tangents 121a are two, the projection of one first hidden tangents 121a on the explosion-proof valve 21 is partially overlapped with one score 211, and the projection of the other first hidden tangents 121a on the explosion-proof valve 21 is partially overlapped with the other score 211. When the single battery 20 is in thermal runaway, the explosion-proof valve 21 is exploded from the notch 211 by high-temperature high-pressure gas generated in the single battery 20, and the high-temperature high-pressure gas can be released from the notch 211 at the moment, because the projection of the first hidden tangent line on the explosion-proof valve is partially overlapped with the notch, concentrated impact force can be formed on the first hidden tangent line 121a, and the impact area of the exploded explosion-proof valve 21 is partially overlapped with the weak areas 121 formed by the plurality of first hidden tangent lines 121a, so that the weak areas 121 formed by the plurality of first hidden tangent lines 121a can be broken more quickly when the explosion-proof valve 21 is exploded, and a tearing notch is formed, so that the second membrane 12 can be torn and pulled by taking the tearing notch as a tearing point, and the first membrane 11 is driven to be torn off from the surface of the single battery 20, thereby facilitating the removal of the outer envelope 10 from the single battery 20, and the recovery of the outer envelope 10; meanwhile, the high-temperature and high-pressure gas in the single battery 20 can be conveniently and quickly separated from the inside of the single battery 20 from the tearing notch, the possibility of explosion of the single battery 20 can be greatly reduced, and the safety of the single battery 20 is further improved.
In some embodiments, the first membrane 11 has a first area 111 for wrapping the bottom of the unit cell 20, where the first area 111 is provided with a plurality of third hidden tangents 1111 extending along the length direction of the unit cell 20, for example, two, three, four, five, six or more strips, etc. It can be known that when the second membrane 12 is torn, the first membrane 11 is firstly driven to tear the first membrane 11 towards two sides of the width direction of the single battery 20, then the first membrane 11 is torn towards the thickness direction of the single battery 20, and by arranging a plurality of third hidden lines 1111 extending along the length direction of the single battery 20 on the first area 111, at least one third hidden line 1111 can be formed on two sides of the width direction of the single battery 20, so that at least one initial position of a tearing opening is formed on two sides of the width direction of the single battery 20, if the first membrane 11 is torn to the bottom of the single battery 20 in the process of tearing, the whole outer envelope 10 cannot be continuously torn off, and the tearing opening formed at the third hidden lines 1111 can be the initial position of a continuous tearing film so as to facilitate tearing off the whole outer envelope 10.
The third hidden line 1111 may be a score line provided on the first region 111, a plurality of through holes provided on the first region 111 in a spaced arrangement, or the like. As to what kind of structure the third hidden line 1111 is, it is not limited in the present embodiment, and may be any kind according to circumstances.
In some embodiments, the first region 111 is provided with a plurality of fourth hidden-cut lines 1112 on both sides of the unit cell 20 in the length direction, for example, two, three, four, five, six or more, and the fourth hidden-cut lines 1112 are located between two adjacent third hidden-cut lines 1111. Like this, the bottom of battery cell 20 can form the initial position of two at least tearing openings in the both sides of battery cell 20's length direction, because first diaphragm 11 usually has stronger ductility, after fourth hidden tangent 1112 breaks away from tearing opening, the part that lies in two adjacent tearing openings of first diaphragm 11 can break away from battery cell 20's surface, forms a part and can be used for being pinched or the perk region of holding, thereby can pinch or hold this perk region and tear first diaphragm 11, make the tearing of first diaphragm 11 more convenient, thereby can improve the recovery efficiency of outer diolame 10 effectively. And the design of many tearing openings also is convenient for tear the membrane in-process even appear the fault, also can utilize the beginning position of this tearing opening to continue the dyestripping of next process.
Illustratively, the fourth hidden line 1112 may be a score line disposed on the first region 111, or may be a plurality of through holes disposed on the first region 111 in a spaced arrangement, or the like. As to what kind of structure the fourth hidden line 1112 is, it is not limited in the present embodiment, and may be any kind according to circumstances.
Referring to fig. 1, a second aspect of the present application discloses an energy storage device, the energy storage device 100 includes a single battery 20 and an outer membrane 10 as described above, the single battery 20 is provided with an explosion-proof valve 21, the first membrane 11 of the outer membrane 10 is wrapped on a part of the outer surface of the single battery 20 and exposes the explosion-proof valve 21, and the second membrane 12 is disposed opposite to the explosion-proof valve 21. It will be appreciated that the energy storage device 100 having the outer envelope 10 as described above can bring about the same or similar advantageous effects as the outer envelope 10, and specific reference may be made to the description of the embodiment of the outer envelope 10, which is not repeated here.
In this embodiment, the energy storage device 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 energy storage device 100 includes a plurality of unit cells 20, the plurality of unit cells 20 are arranged in an array, so that the interval between two adjacent unit cells 20 increases the thickness of the two outer envelopes 10, thereby being beneficial to improving the creepage distance of the unit cells 20 and further improving the safety of the energy storage device 100. It can be appreciated that the practical application scenario of the energy storage device 100 provided in the embodiment of the present application may be, but is not limited to, the listed products, and other application scenarios, and the embodiment of the present application does not strictly limit the application scenario of the energy storage device 100.
Wherein, the unit cell 20 comprises a housing, an electrode assembly and an end cover assembly, the housing is provided with an opening, the electrode assembly is arranged in the housing, the end cover assembly is arranged at the opening in a sealing way, and the explosion-proof valve 21 is arranged on the end cover assembly.
A third aspect of the application discloses a powered device (not shown) having an energy storage device as described hereinbefore. It can be appreciated that, since the energy storage device can bring the same or similar beneficial effects as the outer wrapping film, the electric device can also bring the same or similar beneficial effects as the outer wrapping film, and the description of the embodiment of the outer wrapping film can be referred to specifically, and will not be repeated here.
The technical solution described in the embodiments of the present application is applicable to electric equipment using an energy storage device, such as an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc., where the spacecraft is, for example, an aircraft, a rocket, a space plane, and a spacecraft, etc., and the electric toy includes, for example, a fixed or mobile electric toy, specifically, for example, 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, for example, 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 energy storage device 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 an energy storage device, in particular, for example, the energy storage device may be provided at the bottom or the head or tail of the electric vehicle. The energy storage device may be used for power supply of an electric vehicle, for example, the energy storage device may be used as an operating power source of the electric vehicle. The electric vehicle may further include a controller and a motor, the controller for controlling the energy storage device to supply power to the motor, for example. The energy storage device can be used for starting, navigating and the like of the electric automobile, and of course, the energy storage device can also be used for driving the electric automobile to run, and the energy storage device can be used for substituting or partially substituting fuel oil or natural gas to provide driving for the electric automobile.
The above describes in detail an outer coating film, an energy storage device and electric equipment disclosed in the embodiments of the present application, and specific examples are applied to describe the principles and implementation of the present application, and the description of the above embodiments is only used to help understand the outer coating film, the energy storage device, the electric equipment and the 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 (12)
1. The utility model provides an outer membrane for cladding is at the surface of battery cell (20), battery cell (20) are equipped with explosion-proof valve (21), outer membrane (10) include:
the first membrane (11) is used for coating part of the surface of the single battery (20) and exposing the explosion-proof valve (21); and
the second diaphragm (12), second diaphragm (12) with first diaphragm (11) links to each other, just second diaphragm (12) at least partly be used for with explosion-proof valve (21) are connected, second diaphragm (12) are equipped with weak area (121), weak area (121) are in explosion-proof valve (21) are exploded or are broken when being poked, in order to form and play tearing breach, play tearing breach is used for tearing play of second diaphragm (12) tear the position.
2. The outer envelope according to claim 1, wherein a covering length of the first membrane (11) covering the unit cell (20) is longer than a covering length of the second membrane (12) covering the unit cell (20) in a length direction of the unit cell (20), and a first circular arc chamfer (13) is formed at a joint of the first membrane (11) and the second membrane (12).
3. The outer envelope according to claim 1, characterized in that the second membrane (12) is provided with at least two first hidden cuts (121 a), the at least two first hidden cuts (121 a) constituting the weakened zone (121).
4. A coating according to claim 3, wherein the at least two first hidden tangents (121 a) are arranged parallel to each other.
5. A coating according to claim 3, wherein the first hidden lines (121 a) are two, and the second membrane (12) is provided with two second hidden lines (122), wherein one of the second hidden lines (122) is connected to one end of the two first hidden lines (121 a) and is located at the same end of the two first hidden lines (121 a), and the other of the second hidden lines (122) is connected to the other end of the two first hidden lines (121 a) and is located at the same end of the two first hidden lines (121 a).
6. The outer envelope of claim 5, wherein the second hidden tangent (122) is an arc, and a second circular arc chamfer (14) is formed at a junction of the second hidden tangent (122) and the first hidden tangent (121 a).
7. A coating according to claim 3, wherein the explosion-proof valve (21) has an oval structure, the explosion-proof valve (21) has a long axis direction, the explosion-proof valve (21) is provided with at least two scores (211), both ends of each score (211) are located at both ends of the explosion-proof valve (21) in the long axis direction, the at least two first hidden tangents (121 a) are parallel to the long axis direction, and projections of each first hidden tangents (121 a) on the explosion-proof valve (21) are partially overlapped with each score (211) respectively.
8. The outer envelope according to any one of claims 1-7, wherein the first membrane (11) has a first region (111) for covering the bottom of the unit cell (20), the first region (111) being provided with a plurality of third hidden tangents (1111) extending in the length direction of the unit cell (20).
9. The outer envelope according to claim 8, wherein the first region (111) is provided with a plurality of fourth hidden tangents (1112) on both sides in the length direction of the unit cells (20), the fourth hidden tangents (1112) being located between two adjacent ones of the third hidden tangents (1111).
10. The outer envelope according to any one of claims 1-7, characterized in that the first membrane (11) and the second membrane (12) are integrally injection molded.
11. An energy storage device, characterized in that the energy storage device (100) comprises a single battery (20) and an outer envelope (10) according to any one of claims 1-10, the single battery (20) is provided with an explosion-proof valve (21), the first membrane (11) of the outer envelope (10) is coated on part of the surface of the single battery (20) and exposes the explosion-proof valve (21), and the second membrane (12) is at least partially connected with the explosion-proof valve (21).
12. A powered device, characterized in that the powered device has an energy storage device (100) as claimed in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310981217.4A CN116706459A (en) | 2023-08-07 | 2023-08-07 | Outer envelope, energy storage device and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310981217.4A CN116706459A (en) | 2023-08-07 | 2023-08-07 | Outer envelope, energy storage device and electric equipment |
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| CN116706459A true CN116706459A (en) | 2023-09-05 |
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| CN202310981217.4A Pending CN116706459A (en) | 2023-08-07 | 2023-08-07 | Outer envelope, energy storage device and electric equipment |
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| CN216015604U (en) * | 2021-11-02 | 2022-03-11 | 中航锂电科技有限公司 | Battery with a battery cell |
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| WO2018126544A1 (en) * | 2017-01-05 | 2018-07-12 | 华为技术有限公司 | Battery and mobile terminal |
| CN209374510U (en) * | 2018-11-30 | 2019-09-10 | 金山电化工业（惠州）有限公司 | Battery pack with quick dyestripping recovery structure |
| CN109904353A (en) * | 2019-01-31 | 2019-06-18 | 欣旺达电子股份有限公司 | The coating method and rectangular lithium ion battery of coat insulating film |
| CN212517326U (en) * | 2020-07-21 | 2021-02-09 | 中航锂电（洛阳）有限公司 | Battery module |
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